Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

12 files changed, 4734 insertions, 0 deletions

diff --git a/auth/ntlmssp/gensec_ntlmssp.c b/auth/ntlmssp/gensec_ntlmssp.c
new file mode 100644
index 0000000..329d8eb
--- /dev/null
+++ b/auth/ntlmssp/gensec_ntlmssp.c
@@ -0,0 +1,246 @@
+/*
+ *  Unix SMB/CIFS implementation.
+ *  Version 3.0
+ *  NTLMSSP Signing routines
+ *  Copyright (C) Luke Kenneth Casson Leighton 1996-2001
+ *  Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003-2005
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "includes.h"
+#include "auth/ntlmssp/ntlmssp.h"
+#include "auth/gensec/gensec.h"
+#include "auth/gensec/gensec_internal.h"
+#include "auth/ntlmssp/ntlmssp_private.h"
+
+NTSTATUS gensec_ntlmssp_magic(struct gensec_security *gensec_security,
+			      const DATA_BLOB *first_packet)
+{
+	if (ntlmssp_blob_matches_magic(first_packet)) {
+		return NT_STATUS_OK;
+	} else {
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+}
+
+/**
+ * Return the NTLMSSP master session key
+ *
+ * @param ntlmssp_state NTLMSSP State
+ */
+
+NTSTATUS gensec_ntlmssp_session_key(struct gensec_security *gensec_security,
+				    TALLOC_CTX *mem_ctx,
+				    DATA_BLOB *session_key)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+	struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
+
+	if (ntlmssp_state->expected_state != NTLMSSP_DONE) {
+		return NT_STATUS_NO_USER_SESSION_KEY;
+	}
+
+	if (!ntlmssp_state->session_key.data) {
+		return NT_STATUS_NO_USER_SESSION_KEY;
+	}
+	*session_key = data_blob_talloc(mem_ctx, ntlmssp_state->session_key.data, ntlmssp_state->session_key.length);
+	if (!session_key->data) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	return NT_STATUS_OK;
+}
+
+bool gensec_ntlmssp_have_feature(struct gensec_security *gensec_security,
+				 uint32_t feature)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+	struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
+
+	if (feature & GENSEC_FEATURE_SIGN) {
+		if (!ntlmssp_state->session_key.length) {
+			return false;
+		}
+		if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SIGN) {
+			return true;
+		}
+	}
+	if (feature & GENSEC_FEATURE_SEAL) {
+		if (!ntlmssp_state->session_key.length) {
+			return false;
+		}
+		if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SEAL) {
+			return true;
+		}
+	}
+	if (feature & GENSEC_FEATURE_SESSION_KEY) {
+		if (ntlmssp_state->session_key.length) {
+			return true;
+		}
+	}
+	if (feature & GENSEC_FEATURE_DCE_STYLE) {
+		return true;
+	}
+	if (feature & GENSEC_FEATURE_ASYNC_REPLIES) {
+		if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
+			return true;
+		}
+	}
+	if (feature & GENSEC_FEATURE_SIGN_PKT_HEADER) {
+		return true;
+	}
+	if (feature & GENSEC_FEATURE_NEW_SPNEGO) {
+		if (!ntlmssp_state->session_key.length) {
+			return false;
+		}
+		if (!(ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SIGN)) {
+			return false;
+		}
+		return ntlmssp_state->new_spnego;
+	}
+
+	return false;
+}
+
+NTSTATUS gensec_ntlmssp_start(struct gensec_security *gensec_security)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp;
+
+	gensec_ntlmssp = talloc_zero(gensec_security,
+				     struct gensec_ntlmssp_context);
+	if (!gensec_ntlmssp) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	gensec_security->private_data = gensec_ntlmssp;
+	return NT_STATUS_OK;
+}
+
+NTSTATUS gensec_ntlmssp_sign_packet(struct gensec_security *gensec_security,
+				    TALLOC_CTX *sig_mem_ctx,
+				    const uint8_t *data, size_t length,
+				    const uint8_t *whole_pdu, size_t pdu_length,
+				    DATA_BLOB *sig)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+	NTSTATUS nt_status;
+
+	nt_status = ntlmssp_sign_packet(gensec_ntlmssp->ntlmssp_state,
+					sig_mem_ctx,
+					data, length,
+					whole_pdu, pdu_length,
+					sig);
+
+	return nt_status;
+}
+
+NTSTATUS gensec_ntlmssp_check_packet(struct gensec_security *gensec_security,
+				     const uint8_t *data, size_t length,
+				     const uint8_t *whole_pdu, size_t pdu_length,
+				     const DATA_BLOB *sig)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+	NTSTATUS nt_status;
+
+	nt_status = ntlmssp_check_packet(gensec_ntlmssp->ntlmssp_state,
+					 data, length,
+					 whole_pdu, pdu_length,
+					 sig);
+
+	return nt_status;
+}
+
+NTSTATUS gensec_ntlmssp_seal_packet(struct gensec_security *gensec_security,
+				    TALLOC_CTX *sig_mem_ctx,
+				    uint8_t *data, size_t length,
+				    const uint8_t *whole_pdu, size_t pdu_length,
+				    DATA_BLOB *sig)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+	NTSTATUS nt_status;
+
+	nt_status = ntlmssp_seal_packet(gensec_ntlmssp->ntlmssp_state,
+					sig_mem_ctx,
+					data, length,
+					whole_pdu, pdu_length,
+					sig);
+
+	return nt_status;
+}
+
+/*
+  wrappers for the ntlmssp_*() functions
+*/
+NTSTATUS gensec_ntlmssp_unseal_packet(struct gensec_security *gensec_security,
+				      uint8_t *data, size_t length,
+				      const uint8_t *whole_pdu, size_t pdu_length,
+				      const DATA_BLOB *sig)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+	NTSTATUS nt_status;
+
+	nt_status = ntlmssp_unseal_packet(gensec_ntlmssp->ntlmssp_state,
+					  data, length,
+					  whole_pdu, pdu_length,
+					  sig);
+
+	return nt_status;
+}
+
+size_t gensec_ntlmssp_sig_size(struct gensec_security *gensec_security, size_t data_size)
+{
+	return NTLMSSP_SIG_SIZE;
+}
+
+NTSTATUS gensec_ntlmssp_wrap(struct gensec_security *gensec_security,
+			     TALLOC_CTX *out_mem_ctx,
+			     const DATA_BLOB *in,
+			     DATA_BLOB *out)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+
+	return ntlmssp_wrap(gensec_ntlmssp->ntlmssp_state,
+			    out_mem_ctx,
+			    in, out);
+}
+
+
+NTSTATUS gensec_ntlmssp_unwrap(struct gensec_security *gensec_security,
+			       TALLOC_CTX *out_mem_ctx,
+			       const DATA_BLOB *in,
+			       DATA_BLOB *out)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+
+	return ntlmssp_unwrap(gensec_ntlmssp->ntlmssp_state,
+			      out_mem_ctx,
+			      in, out);
+}
diff --git a/auth/ntlmssp/gensec_ntlmssp_server.c b/auth/ntlmssp/gensec_ntlmssp_server.c
new file mode 100644
index 0000000..ab92f4d
--- /dev/null
+++ b/auth/ntlmssp/gensec_ntlmssp_server.c
@@ -0,0 +1,245 @@
+/*
+   Unix SMB/Netbios implementation.
+   Version 3.0
+   handle NLTMSSP, client server side parsing
+
+   Copyright (C) Andrew Tridgell      2001
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2005
+   Copyright (C) Stefan Metzmacher 2005
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "system/network.h"
+#include "lib/tsocket/tsocket.h"
+#include "auth/ntlmssp/ntlmssp.h"
+#include "../librpc/gen_ndr/ndr_ntlmssp.h"
+#include "auth/ntlmssp/ntlmssp_ndr.h"
+#include "auth/ntlmssp/ntlmssp_private.h"
+#include "../libcli/auth/libcli_auth.h"
+#include "../lib/crypto/crypto.h"
+#include "auth/gensec/gensec.h"
+#include "auth/gensec/gensec_internal.h"
+#include "auth/common_auth.h"
+#include "param/param.h"
+#include "param/loadparm.h"
+#include "libds/common/roles.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
+
+/**
+ * Return the credentials of a logged on user, including session keys
+ * etc.
+ *
+ * Only valid after a successful authentication
+ *
+ * May only be called once per authentication.
+ *
+ */
+
+NTSTATUS gensec_ntlmssp_session_info(struct gensec_security *gensec_security,
+				     TALLOC_CTX *mem_ctx,
+				     struct auth_session_info **session_info)
+{
+	NTSTATUS nt_status;
+	struct gensec_ntlmssp_context *gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+	uint32_t session_info_flags = 0;
+
+	if (gensec_security->want_features & GENSEC_FEATURE_UNIX_TOKEN) {
+		session_info_flags |= AUTH_SESSION_INFO_UNIX_TOKEN;
+	}
+
+	session_info_flags |= AUTH_SESSION_INFO_DEFAULT_GROUPS;
+	session_info_flags |= AUTH_SESSION_INFO_NTLM;
+
+	if (gensec_security->auth_context && gensec_security->auth_context->generate_session_info) {
+		nt_status = gensec_security->auth_context->generate_session_info(gensec_security->auth_context, mem_ctx, 
+										 gensec_ntlmssp->server_returned_info,
+										 gensec_ntlmssp->ntlmssp_state->user,
+										 session_info_flags,
+										 session_info);
+	} else {
+		DEBUG(0, ("Cannot generate a session_info without the auth_context\n"));
+		return NT_STATUS_INTERNAL_ERROR;
+	}
+
+	NT_STATUS_NOT_OK_RETURN(nt_status);
+
+	nt_status = gensec_ntlmssp_session_key(gensec_security, *session_info,
+					       &(*session_info)->session_key);
+	if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_USER_SESSION_KEY)) {
+		(*session_info)->session_key = data_blob_null;
+		nt_status = NT_STATUS_OK;
+	}
+
+	return nt_status;
+}
+
+/**
+ * Start NTLMSSP on the server side
+ *
+ */
+NTSTATUS gensec_ntlmssp_server_start(struct gensec_security *gensec_security)
+{
+	NTSTATUS nt_status;
+	struct ntlmssp_state *ntlmssp_state;
+	struct gensec_ntlmssp_context *gensec_ntlmssp;
+	const char *netbios_name;
+	const char *netbios_domain;
+	const char *dns_name;
+	const char *dns_domain;
+	enum server_role role;
+
+	role = lpcfg_server_role(gensec_security->settings->lp_ctx);
+
+	nt_status = gensec_ntlmssp_start(gensec_security);
+	NT_STATUS_NOT_OK_RETURN(nt_status);
+
+	gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+
+	ntlmssp_state = talloc_zero(gensec_ntlmssp,
+				    struct ntlmssp_state);
+	if (!ntlmssp_state) {
+		return NT_STATUS_NO_MEMORY;
+	}
+	gensec_ntlmssp->ntlmssp_state = ntlmssp_state;
+
+	ntlmssp_state->role = NTLMSSP_SERVER;
+
+	ntlmssp_state->expected_state = NTLMSSP_NEGOTIATE;
+
+	ntlmssp_state->allow_lm_response =
+		lpcfg_lanman_auth(gensec_security->settings->lp_ctx);
+
+	if (ntlmssp_state->allow_lm_response &&
+	    gensec_setting_bool(gensec_security->settings,
+				"ntlmssp_server", "allow_lm_key", false))
+	{
+		ntlmssp_state->allow_lm_key = true;
+	}
+
+	ntlmssp_state->force_old_spnego = false;
+
+	if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "force_old_spnego", false)) {
+		/*
+		 * For testing Windows 2000 mode
+		 */
+		ntlmssp_state->force_old_spnego = true;
+	}
+
+	ntlmssp_state->neg_flags =
+		NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_VERSION;
+
+	if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "128bit", true)) {
+		ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_128;
+	}
+
+	if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "56bit", true)) {
+		ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_56;
+	}
+
+	if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "keyexchange", true)) {
+		ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_KEY_EXCH;
+	}
+
+	if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "alwayssign", true)) {
+		ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
+	}
+
+	if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "ntlm2", true)) {
+		ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
+	}
+
+	if (ntlmssp_state->allow_lm_key) {
+		ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
+	}
+
+	/*
+	 * We always allow NTLMSSP_NEGOTIATE_SIGN and NTLMSSP_NEGOTIATE_SEAL.
+	 *
+	 * These will be removed if the client doesn't want them.
+	 */
+	ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
+	ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
+
+
+	if (role == ROLE_STANDALONE) {
+		ntlmssp_state->server.is_standalone = true;
+	} else {
+		ntlmssp_state->server.is_standalone = false;
+	}
+
+	if (gensec_security->settings->server_netbios_name) {
+		netbios_name = gensec_security->settings->server_netbios_name;
+	} else {
+		netbios_name = lpcfg_netbios_name(gensec_security->settings->lp_ctx);
+	}
+
+	if (gensec_security->settings->server_netbios_domain) {
+		netbios_domain = gensec_security->settings->server_netbios_domain;
+	} else {
+		netbios_domain = lpcfg_workgroup(gensec_security->settings->lp_ctx);
+	}
+
+	if (gensec_security->settings->server_dns_name) {
+		dns_name = gensec_security->settings->server_dns_name;
+	} else {
+		const char *dnsdomain = lpcfg_dnsdomain(gensec_security->settings->lp_ctx);
+		char *lower_netbiosname;
+
+		lower_netbiosname = strlower_talloc(ntlmssp_state, netbios_name);
+		NT_STATUS_HAVE_NO_MEMORY(lower_netbiosname);
+
+		/* Find out the DNS host name */
+		if (dnsdomain && dnsdomain[0] != '\0') {
+			dns_name = talloc_asprintf(ntlmssp_state, "%s.%s",
+						   lower_netbiosname,
+						   dnsdomain);
+			talloc_free(lower_netbiosname);
+			NT_STATUS_HAVE_NO_MEMORY(dns_name);
+		} else {
+			dns_name = lower_netbiosname;
+		}
+	}
+
+	if (gensec_security->settings->server_dns_domain) {
+		dns_domain = gensec_security->settings->server_dns_domain;
+	} else {
+		dns_domain = lpcfg_dnsdomain(gensec_security->settings->lp_ctx);
+	}
+
+	ntlmssp_state->server.netbios_name = talloc_strdup(ntlmssp_state, netbios_name);
+	NT_STATUS_HAVE_NO_MEMORY(ntlmssp_state->server.netbios_name);
+
+	ntlmssp_state->server.netbios_domain = talloc_strdup(ntlmssp_state, netbios_domain);
+	NT_STATUS_HAVE_NO_MEMORY(ntlmssp_state->server.netbios_domain);
+
+	ntlmssp_state->server.dns_name = talloc_strdup(ntlmssp_state, dns_name);
+	NT_STATUS_HAVE_NO_MEMORY(ntlmssp_state->server.dns_name);
+
+	ntlmssp_state->server.dns_domain = talloc_strdup(ntlmssp_state, dns_domain);
+	NT_STATUS_HAVE_NO_MEMORY(ntlmssp_state->server.dns_domain);
+
+	ntlmssp_state->neg_flags |= ntlmssp_state->required_flags;
+	ntlmssp_state->conf_flags = ntlmssp_state->neg_flags;
+
+	return NT_STATUS_OK;
+}
+
diff --git a/auth/ntlmssp/ntlmssp.c b/auth/ntlmssp/ntlmssp.c
new file mode 100644
index 0000000..745f262
--- /dev/null
+++ b/auth/ntlmssp/ntlmssp.c
@@ -0,0 +1,408 @@
+/*
+   Unix SMB/Netbios implementation.
+   Version 3.0
+   handle NLTMSSP, client server side parsing
+
+   Copyright (C) Andrew Tridgell      2001
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2005
+   Copyright (C) Stefan Metzmacher 2005
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+struct auth_session_info;
+
+#include "includes.h"
+#include <tevent.h>
+#include "lib/util/tevent_ntstatus.h"
+#include "auth/ntlmssp/ntlmssp.h"
+#include "auth/ntlmssp/ntlmssp_private.h"
+#include "../libcli/auth/libcli_auth.h"
+#include "librpc/gen_ndr/ndr_dcerpc.h"
+#include "auth/gensec/gensec.h"
+#include "auth/gensec/gensec_internal.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
+
+/**
+ * Callbacks for NTLMSSP - for both client and server operating modes
+ *
+ */
+
+static const struct ntlmssp_callbacks {
+	enum ntlmssp_role role;
+	enum ntlmssp_message_type command;
+	NTSTATUS (*sync_fn)(struct gensec_security *gensec_security,
+			    TALLOC_CTX *out_mem_ctx,
+			    DATA_BLOB in, DATA_BLOB *out);
+	struct tevent_req *(*send_fn)(TALLOC_CTX *mem_ctx,
+				      struct tevent_context *ev,
+				      struct gensec_security *gensec_security,
+				      const DATA_BLOB in);
+	NTSTATUS (*recv_fn)(struct tevent_req *req,
+			    TALLOC_CTX *out_mem_ctx,
+			    DATA_BLOB *out);
+} ntlmssp_callbacks[] = {
+	{
+		.role		= NTLMSSP_CLIENT,
+		.command	= NTLMSSP_INITIAL,
+		.sync_fn	= ntlmssp_client_initial,
+	},{
+		.role		= NTLMSSP_CLIENT,
+		.command	= NTLMSSP_NEGOTIATE,
+		.sync_fn	= gensec_ntlmssp_resume_ccache,
+	},{
+		.role		= NTLMSSP_SERVER,
+		.command	= NTLMSSP_NEGOTIATE,
+		.sync_fn	= gensec_ntlmssp_server_negotiate,
+	},{
+		.role		= NTLMSSP_CLIENT,
+		.command	= NTLMSSP_CHALLENGE,
+		.sync_fn	= ntlmssp_client_challenge,
+	},{
+		.role		= NTLMSSP_SERVER,
+		.command	= NTLMSSP_AUTH,
+		.send_fn	= ntlmssp_server_auth_send,
+		.recv_fn	= ntlmssp_server_auth_recv,
+	}
+};
+
+
+static NTSTATUS gensec_ntlmssp_update_find(struct gensec_security *gensec_security,
+					   struct gensec_ntlmssp_context *gensec_ntlmssp,
+					   const DATA_BLOB input, uint32_t *idx)
+{
+	uint32_t ntlmssp_command;
+	uint32_t i;
+
+	if (gensec_ntlmssp->ntlmssp_state->expected_state == NTLMSSP_DONE) {
+		/* We are strict here because other modules, which we
+		 * don't fully control (such as GSSAPI) are also
+		 * strict, but are tested less often */
+
+		DEBUG(1, ("Called NTLMSSP after state machine was 'done'\n"));
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	if (!input.length) {
+		switch (gensec_ntlmssp->ntlmssp_state->role) {
+		case NTLMSSP_CLIENT:
+			if (gensec_ntlmssp->ntlmssp_state->resume_ccache) {
+				/*
+				 * make sure gensec_ntlmssp_resume_ccache()
+				 * will be called
+				 */
+				ntlmssp_command = NTLMSSP_NEGOTIATE;
+				break;
+			}
+
+			ntlmssp_command = NTLMSSP_INITIAL;
+			break;
+		case NTLMSSP_SERVER:
+			if (gensec_security->want_features & GENSEC_FEATURE_DATAGRAM_MODE) {
+				/* 'datagram' mode - no neg packet */
+				ntlmssp_command = NTLMSSP_NEGOTIATE;
+			} else {
+				/* This is normal in SPNEGO mech negotiation fallback */
+				DEBUG(2, ("Failed to parse NTLMSSP packet: zero length\n"));
+				return NT_STATUS_INVALID_PARAMETER;
+			}
+			break;
+		default:
+			DEBUG(1, ("NTLMSSP state has invalid role %d\n",
+				  gensec_ntlmssp->ntlmssp_state->role));
+			return NT_STATUS_INVALID_PARAMETER;
+		}
+	} else {
+		if (!msrpc_parse(gensec_ntlmssp->ntlmssp_state,
+				 &input, "Cd",
+				 "NTLMSSP",
+				 &ntlmssp_command)) {
+			DEBUG(1, ("Failed to parse NTLMSSP packet, could not extract NTLMSSP command\n"));
+			dump_data(2, input.data, input.length);
+			return NT_STATUS_INVALID_PARAMETER;
+		}
+	}
+
+	if (ntlmssp_command != gensec_ntlmssp->ntlmssp_state->expected_state) {
+		DEBUG(2, ("got NTLMSSP command %u, expected %u\n", ntlmssp_command,
+			  gensec_ntlmssp->ntlmssp_state->expected_state));
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	for (i=0; i < ARRAY_SIZE(ntlmssp_callbacks); i++) {
+		if (ntlmssp_callbacks[i].role == gensec_ntlmssp->ntlmssp_state->role &&
+		    ntlmssp_callbacks[i].command == ntlmssp_command) {
+			*idx = i;
+			return NT_STATUS_OK;
+		}
+	}
+
+	DEBUG(1, ("failed to find NTLMSSP callback for NTLMSSP mode %u, command %u\n",
+		  gensec_ntlmssp->ntlmssp_state->role, ntlmssp_command));
+
+	return NT_STATUS_INVALID_PARAMETER;
+}
+
+struct gensec_ntlmssp_update_state {
+	const struct ntlmssp_callbacks *cb;
+	NTSTATUS status;
+	DATA_BLOB out;
+};
+
+static void gensec_ntlmssp_update_done(struct tevent_req *subreq);
+
+static struct tevent_req *gensec_ntlmssp_update_send(TALLOC_CTX *mem_ctx,
+						     struct tevent_context *ev,
+						     struct gensec_security *gensec_security,
+						     const DATA_BLOB in)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+	struct tevent_req *req = NULL;
+	struct gensec_ntlmssp_update_state *state = NULL;
+	NTSTATUS status;
+	uint32_t i = 0;
+
+	req = tevent_req_create(mem_ctx, &state,
+				struct gensec_ntlmssp_update_state);
+	if (req == NULL) {
+		return NULL;
+	}
+
+	status = gensec_ntlmssp_update_find(gensec_security,
+					    gensec_ntlmssp,
+					    in, &i);
+	if (tevent_req_nterror(req, status)) {
+		return tevent_req_post(req, ev);
+	}
+
+	if (ntlmssp_callbacks[i].send_fn != NULL) {
+		struct tevent_req *subreq = NULL;
+
+		state->cb = &ntlmssp_callbacks[i];
+
+		subreq = state->cb->send_fn(state, ev,
+					    gensec_security,
+					    in);
+		if (tevent_req_nomem(subreq, req)) {
+			return tevent_req_post(req, ev);
+		}
+		tevent_req_set_callback(subreq,
+					gensec_ntlmssp_update_done,
+					req);
+		return req;
+	}
+
+	status = ntlmssp_callbacks[i].sync_fn(gensec_security,
+					      state,
+					      in, &state->out);
+	state->status = status;
+	if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+		tevent_req_done(req);
+		return tevent_req_post(req, ev);
+	}
+	if (tevent_req_nterror(req, status)) {
+		return tevent_req_post(req, ev);
+	}
+
+	tevent_req_done(req);
+	return tevent_req_post(req, ev);
+}
+
+static void gensec_ntlmssp_update_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req =
+		tevent_req_callback_data(subreq,
+		struct tevent_req);
+	struct gensec_ntlmssp_update_state *state =
+		tevent_req_data(req,
+		struct gensec_ntlmssp_update_state);
+	NTSTATUS status;
+
+	status = state->cb->recv_fn(subreq, state, &state->out);
+	TALLOC_FREE(subreq);
+	if (GENSEC_UPDATE_IS_NTERROR(status)) {
+		tevent_req_nterror(req, status);
+		return;
+	}
+
+	state->status = status;
+	tevent_req_done(req);
+}
+
+static NTSTATUS gensec_ntlmssp_update_recv(struct tevent_req *req,
+					   TALLOC_CTX *out_mem_ctx,
+					   DATA_BLOB *out)
+{
+	struct gensec_ntlmssp_update_state *state =
+		tevent_req_data(req,
+		struct gensec_ntlmssp_update_state);
+	NTSTATUS status;
+
+	*out = data_blob_null;
+
+	if (tevent_req_is_nterror(req, &status)) {
+		tevent_req_received(req);
+		return status;
+	}
+
+	*out = state->out;
+	talloc_steal(out_mem_ctx, state->out.data);
+	status = state->status;
+	tevent_req_received(req);
+	return status;
+}
+
+static NTSTATUS gensec_ntlmssp_may_reset_crypto(struct gensec_security *gensec_security,
+						bool full_reset)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+	struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
+	NTSTATUS status;
+	bool reset_seqnums = full_reset;
+
+	if (!gensec_ntlmssp_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
+		return NT_STATUS_OK;
+	}
+
+	status = ntlmssp_sign_reset(ntlmssp_state, reset_seqnums);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(1, ("Could not reset NTLMSSP signing/sealing system (error was: %s)\n",
+			  nt_errstr(status)));
+		return status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+static const char *gensec_ntlmssp_final_auth_type(struct gensec_security *gensec_security)
+{
+	return GENSEC_FINAL_AUTH_TYPE_NTLMSSP;
+}
+
+static const char *gensec_ntlmssp_oids[] = {
+	GENSEC_OID_NTLMSSP,
+	NULL
+};
+
+static const struct gensec_security_ops gensec_ntlmssp_security_ops = {
+	.name		= "ntlmssp",
+	.sasl_name	= GENSEC_SASL_NAME_NTLMSSP, /* "NTLM" */
+	.auth_type	= DCERPC_AUTH_TYPE_NTLMSSP,
+	.weak_crypto    = true,
+	.oid            = gensec_ntlmssp_oids,
+	.client_start   = gensec_ntlmssp_client_start,
+	.server_start   = gensec_ntlmssp_server_start,
+	.magic 	        = gensec_ntlmssp_magic,
+	.update_send	= gensec_ntlmssp_update_send,
+	.update_recv	= gensec_ntlmssp_update_recv,
+	.may_reset_crypto= gensec_ntlmssp_may_reset_crypto,
+	.sig_size	= gensec_ntlmssp_sig_size,
+	.sign_packet	= gensec_ntlmssp_sign_packet,
+	.check_packet	= gensec_ntlmssp_check_packet,
+	.seal_packet	= gensec_ntlmssp_seal_packet,
+	.unseal_packet	= gensec_ntlmssp_unseal_packet,
+	.wrap           = gensec_ntlmssp_wrap,
+	.unwrap         = gensec_ntlmssp_unwrap,
+	.session_key	= gensec_ntlmssp_session_key,
+	.session_info   = gensec_ntlmssp_session_info,
+	.have_feature   = gensec_ntlmssp_have_feature,
+	.final_auth_type = gensec_ntlmssp_final_auth_type,
+	.enabled        = true,
+	.priority       = GENSEC_NTLMSSP
+};
+
+static const struct gensec_security_ops gensec_ntlmssp_resume_ccache_ops = {
+	.name		= "ntlmssp_resume_ccache",
+	.weak_crypto    = true,
+	.client_start   = gensec_ntlmssp_resume_ccache_start,
+	.update_send	= gensec_ntlmssp_update_send,
+	.update_recv	= gensec_ntlmssp_update_recv,
+	.session_key	= gensec_ntlmssp_session_key,
+	.have_feature   = gensec_ntlmssp_have_feature,
+	.enabled        = true,
+	.priority       = GENSEC_NTLMSSP
+};
+
+_PUBLIC_ NTSTATUS gensec_ntlmssp_init(TALLOC_CTX *ctx)
+{
+	NTSTATUS ret;
+
+	ret = gensec_register(ctx, &gensec_ntlmssp_security_ops);
+	if (!NT_STATUS_IS_OK(ret)) {
+		DEBUG(0,("Failed to register '%s' gensec backend!\n",
+			gensec_ntlmssp_security_ops.name));
+		return ret;
+	}
+
+	ret = gensec_register(ctx, &gensec_ntlmssp_resume_ccache_ops);
+	if (!NT_STATUS_IS_OK(ret)) {
+		DEBUG(0,("Failed to register '%s' gensec backend!\n",
+			gensec_ntlmssp_resume_ccache_ops.name));
+		return ret;
+	}
+
+	return ret;
+}
+
+static struct gensec_security *gensec_find_child_by_ops(struct gensec_security *gensec_security,
+							const struct gensec_security_ops *ops)
+{
+	struct gensec_security *current = gensec_security;
+
+	while (current != NULL) {
+		if (current->ops == ops) {
+			return current;
+		}
+
+		current = current->child_security;
+	}
+
+	return NULL;
+}
+
+uint32_t gensec_ntlmssp_neg_flags(struct gensec_security *gensec_security)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp;
+
+	gensec_security = gensec_find_child_by_ops(gensec_security,
+					&gensec_ntlmssp_security_ops);
+	if (gensec_security == NULL) {
+		return 0;
+	}
+
+	gensec_ntlmssp = talloc_get_type_abort(gensec_security->private_data,
+					       struct gensec_ntlmssp_context);
+	return gensec_ntlmssp->ntlmssp_state->neg_flags;
+}
+
+const char *gensec_ntlmssp_server_domain(struct gensec_security *gensec_security)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp;
+
+	gensec_security = gensec_find_child_by_ops(gensec_security,
+					&gensec_ntlmssp_security_ops);
+	if (gensec_security == NULL) {
+		return NULL;
+	}
+
+	gensec_ntlmssp = talloc_get_type_abort(gensec_security->private_data,
+					       struct gensec_ntlmssp_context);
+	return gensec_ntlmssp->ntlmssp_state->server.netbios_domain;
+}
diff --git a/auth/ntlmssp/ntlmssp.h b/auth/ntlmssp/ntlmssp.h
new file mode 100644
index 0000000..658d3fa
--- /dev/null
+++ b/auth/ntlmssp/ntlmssp.h
@@ -0,0 +1,151 @@
+/*
+   Unix SMB/CIFS implementation.
+   SMB parameters and setup
+   Copyright (C) Andrew Tridgell 1992-1997
+   Copyright (C) Luke Kenneth Casson Leighton 1996-1997
+   Copyright (C) Paul Ashton 1997
+   Copyright (C) Andrew Bartlett 2010
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "../librpc/gen_ndr/ntlmssp.h"
+
+struct auth_context;
+struct auth_serversupplied_info;
+struct tsocket_address;
+struct auth_user_info_dc;
+struct gensec_security;
+struct ntlmssp_state;
+
+/* NTLMSSP mode */
+enum ntlmssp_role
+{
+	NTLMSSP_SERVER,
+	NTLMSSP_CLIENT
+};
+
+/* NTLMSSP message types */
+enum ntlmssp_message_type
+{
+	NTLMSSP_INITIAL = 0 /* samba internal state */,
+	NTLMSSP_NEGOTIATE = 1,
+	NTLMSSP_CHALLENGE = 2,
+	NTLMSSP_AUTH      = 3,
+	NTLMSSP_UNKNOWN   = 4,
+	NTLMSSP_DONE      = 5 /* samba final state */
+};
+
+#define NTLMSSP_FEATURE_SESSION_KEY        0x00000001
+#define NTLMSSP_FEATURE_SIGN               0x00000002
+#define NTLMSSP_FEATURE_SEAL               0x00000004
+#define NTLMSSP_FEATURE_CCACHE		   0x00000008
+
+union ntlmssp_crypt_state;
+
+struct ntlmssp_state
+{
+	enum ntlmssp_role role;
+	uint32_t expected_state;
+
+	bool unicode;
+	bool use_ntlmv2;
+	bool use_ccache;
+	bool resume_ccache;
+	bool use_nt_response;  /* Set to 'False' to debug what happens when the NT response is omited */
+	bool allow_lm_response;/* The LM_RESPONSE code is not very secure... */
+	bool allow_lm_key;     /* The LM_KEY code is not very secure... */
+
+	const char *user;
+	const char *domain;
+	uint8_t *nt_hash;
+	uint8_t *lm_hash;
+
+	DATA_BLOB negotiate_blob;
+	DATA_BLOB challenge_blob;
+	bool new_spnego;
+	bool force_old_spnego;
+
+	struct {
+		const char *netbios_name;
+		const char *netbios_domain;
+		struct AV_PAIR_LIST av_pair_list;
+	} client;
+
+	struct {
+		bool is_standalone;
+		const char *netbios_name;
+		const char *netbios_domain;
+		const char *dns_name;
+		const char *dns_domain;
+		NTTIME challenge_endtime;
+		struct AV_PAIR_LIST av_pair_list;
+	} server;
+
+	DATA_BLOB internal_chal; /* Random challenge as supplied to the client for NTLM authentication */
+
+	DATA_BLOB chal; /* Random challenge as input into the actual NTLM (or NTLM2) authentication */
+	DATA_BLOB lm_resp;
+	DATA_BLOB nt_resp;
+	DATA_BLOB session_key;
+
+	uint32_t conf_flags;
+	uint32_t required_flags;
+	uint32_t neg_flags; /* the current state of negotiation with the NTLMSSP partner */
+
+	bool force_wrap_seal;
+
+	union ntlmssp_crypt_state *crypt;
+};
+
+/* The following definitions come from libcli/auth/ntlmssp_sign.c  */
+
+NTSTATUS ntlmssp_sign_packet(struct ntlmssp_state *ntlmssp_state,
+			     TALLOC_CTX *sig_mem_ctx,
+			     const uint8_t *data, size_t length,
+			     const uint8_t *whole_pdu, size_t pdu_length,
+			     DATA_BLOB *sig);
+NTSTATUS ntlmssp_check_packet(struct ntlmssp_state *ntlmssp_state,
+			      const uint8_t *data, size_t length,
+			      const uint8_t *whole_pdu, size_t pdu_length,
+			      const DATA_BLOB *sig) ;
+NTSTATUS ntlmssp_seal_packet(struct ntlmssp_state *ntlmssp_state,
+			     TALLOC_CTX *sig_mem_ctx,
+			     uint8_t *data, size_t length,
+			     const uint8_t *whole_pdu, size_t pdu_length,
+			     DATA_BLOB *sig);
+NTSTATUS ntlmssp_unseal_packet(struct ntlmssp_state *ntlmssp_state,
+			       uint8_t *data, size_t length,
+			       const uint8_t *whole_pdu, size_t pdu_length,
+			       const DATA_BLOB *sig);
+NTSTATUS ntlmssp_wrap(struct ntlmssp_state *ntlmssp_state,
+		      TALLOC_CTX *out_mem_ctx,
+		      const DATA_BLOB *in,
+		      DATA_BLOB *out);
+NTSTATUS ntlmssp_unwrap(struct ntlmssp_state *ntlmssp_stae,
+			TALLOC_CTX *out_mem_ctx,
+			const DATA_BLOB *in,
+			DATA_BLOB *out);
+NTSTATUS ntlmssp_sign_reset(struct ntlmssp_state *ntlmssp_state,
+			    bool reset_seqnums);
+NTSTATUS ntlmssp_sign_init(struct ntlmssp_state *ntlmssp_state);
+
+bool ntlmssp_blob_matches_magic(const DATA_BLOB *blob);
+
+/* The following definitions come from auth/ntlmssp/gensec_ntlmssp.c  */
+
+NTSTATUS gensec_ntlmssp_init(TALLOC_CTX *ctx);
+
+uint32_t gensec_ntlmssp_neg_flags(struct gensec_security *gensec_security);
+const char *gensec_ntlmssp_server_domain(struct gensec_security *gensec_security);
diff --git a/auth/ntlmssp/ntlmssp_client.c b/auth/ntlmssp/ntlmssp_client.c
new file mode 100644
index 0000000..af1642d
--- /dev/null
+++ b/auth/ntlmssp/ntlmssp_client.c
@@ -0,0 +1,1020 @@
+/*
+   Unix SMB/Netbios implementation.
+   Version 3.0
+   handle NLTMSSP, client server side parsing
+
+   Copyright (C) Andrew Tridgell      2001
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2005
+   Copyright (C) Stefan Metzmacher 2005
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+struct auth_session_info;
+
+#include "includes.h"
+#include "auth/ntlmssp/ntlmssp.h"
+#include "../libcli/auth/libcli_auth.h"
+#include "auth/credentials/credentials.h"
+#include "auth/gensec/gensec.h"
+#include "auth/gensec/gensec_internal.h"
+#include "param/param.h"
+#include "auth/ntlmssp/ntlmssp_private.h"
+#include "../librpc/gen_ndr/ndr_ntlmssp.h"
+#include "../auth/ntlmssp/ntlmssp_ndr.h"
+#include "../nsswitch/libwbclient/wbclient.h"
+
+#include "lib/crypto/gnutls_helpers.h"
+#include <gnutls/gnutls.h>
+#include <gnutls/crypto.h>
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
+
+/*********************************************************************
+ Client side NTLMSSP
+*********************************************************************/
+
+/**
+ * Next state function for the Initial packet
+ *
+ * @param ntlmssp_state NTLMSSP State
+ * @param out_mem_ctx The DATA_BLOB *out will be allocated on this context
+ * @param in A NULL data blob (input ignored)
+ * @param out The initial negotiate request to the server, as an talloc()ed DATA_BLOB, on out_mem_ctx
+ * @return Errors or NT_STATUS_OK.
+ */
+
+NTSTATUS ntlmssp_client_initial(struct gensec_security *gensec_security,
+				TALLOC_CTX *out_mem_ctx,
+				DATA_BLOB in, DATA_BLOB *out)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+	struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
+	NTSTATUS status;
+	const DATA_BLOB version_blob = ntlmssp_version_blob();
+
+	/* generate the ntlmssp negotiate packet */
+	status = msrpc_gen(out_mem_ctx,
+		  out, "CddAAb",
+		  "NTLMSSP",
+		  NTLMSSP_NEGOTIATE,
+		  ntlmssp_state->neg_flags,
+		  "", /* domain */
+		  "", /* workstation */
+		  version_blob.data, version_blob.length);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0, ("ntlmssp_client_initial: failed to generate "
+			  "ntlmssp negotiate packet\n"));
+		return status;
+	}
+
+	if (DEBUGLEVEL >= 10) {
+		struct NEGOTIATE_MESSAGE *negotiate = talloc(
+			ntlmssp_state, struct NEGOTIATE_MESSAGE);
+		if (negotiate != NULL) {
+			status = ntlmssp_pull_NEGOTIATE_MESSAGE(
+				out, negotiate, negotiate);
+			if (NT_STATUS_IS_OK(status)) {
+				NDR_PRINT_DEBUG(NEGOTIATE_MESSAGE,
+						negotiate);
+			}
+			TALLOC_FREE(negotiate);
+		}
+	}
+
+	ntlmssp_state->negotiate_blob = data_blob_dup_talloc(ntlmssp_state,
+							     *out);
+	if (ntlmssp_state->negotiate_blob.length != out->length) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
+
+	return NT_STATUS_MORE_PROCESSING_REQUIRED;
+}
+
+NTSTATUS gensec_ntlmssp_resume_ccache(struct gensec_security *gensec_security,
+				TALLOC_CTX *out_mem_ctx,
+				DATA_BLOB in, DATA_BLOB *out)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+	struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
+	uint32_t neg_flags = 0;
+	uint32_t ntlmssp_command;
+	NTSTATUS status;
+	bool ok;
+
+	*out = data_blob_null;
+
+	if (in.length == 0) {
+		/*
+		 * This is compat code for older callers
+		 * which were missing the "initial_blob"/"negotiate_blob".
+		 *
+		 * That means we can't calculate the NTLMSSP_MIC
+		 * field correctly and need to force the
+		 * old_spnego behaviour.
+		 */
+		DEBUG(10, ("%s: in.length==%u force_old_spnego!\n",
+			   __func__, (unsigned int)in.length));
+		ntlmssp_state->force_old_spnego = true;
+		ntlmssp_state->neg_flags |= ntlmssp_state->required_flags;
+		ntlmssp_state->required_flags = 0;
+		ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
+		return NT_STATUS_MORE_PROCESSING_REQUIRED;
+	}
+
+	/* parse the NTLMSSP packet */
+
+	if (in.length > UINT16_MAX) {
+		DEBUG(1, ("%s: reject large request of length %u\n",
+			__func__, (unsigned int)in.length));
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	ok = msrpc_parse(ntlmssp_state, &in, "Cdd",
+			 "NTLMSSP",
+			 &ntlmssp_command,
+			 &neg_flags);
+	if (!ok) {
+		DEBUG(1, ("%s: failed to parse NTLMSSP Negotiate of length %u\n",
+			__func__, (unsigned int)in.length));
+		dump_data(2, in.data, in.length);
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	if (ntlmssp_command != NTLMSSP_NEGOTIATE) {
+		DEBUG(1, ("%s: no NTLMSSP Negotiate message (length %u)\n",
+			__func__, (unsigned int)in.length));
+		dump_data(2, in.data, in.length);
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	ntlmssp_state->neg_flags = neg_flags;
+	DEBUG(3, ("Imported Negotiate flags:\n"));
+	debug_ntlmssp_flags(neg_flags);
+
+	if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_UNICODE) {
+		ntlmssp_state->unicode = true;
+	} else {
+		ntlmssp_state->unicode = false;
+	}
+
+	if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SIGN) {
+		gensec_security->want_features |= GENSEC_FEATURE_SIGN;
+	}
+
+	if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SEAL) {
+		gensec_security->want_features |= GENSEC_FEATURE_SEAL;
+	}
+
+	ntlmssp_state->conf_flags = ntlmssp_state->neg_flags;
+	ntlmssp_state->required_flags = 0;
+
+	if (DEBUGLEVEL >= 10) {
+		struct NEGOTIATE_MESSAGE *negotiate = talloc(
+			ntlmssp_state, struct NEGOTIATE_MESSAGE);
+		if (negotiate != NULL) {
+			status = ntlmssp_pull_NEGOTIATE_MESSAGE(
+				&in, negotiate, negotiate);
+			if (NT_STATUS_IS_OK(status)) {
+				NDR_PRINT_DEBUG(NEGOTIATE_MESSAGE,
+						negotiate);
+			}
+			TALLOC_FREE(negotiate);
+		}
+	}
+
+	ntlmssp_state->negotiate_blob = data_blob_dup_talloc(ntlmssp_state,
+							     in);
+	if (ntlmssp_state->negotiate_blob.length != in.length) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
+
+	return NT_STATUS_MORE_PROCESSING_REQUIRED;
+}
+
+/**
+ * Next state function for the Challenge Packet.  Generate an auth packet.
+ *
+ * @param gensec_security GENSEC state
+ * @param out_mem_ctx Memory context for *out
+ * @param in The server challnege, as a DATA_BLOB.  reply.data must be NULL
+ * @param out The next request (auth packet) to the server, as an allocated DATA_BLOB, on the out_mem_ctx context
+ * @return Errors or NT_STATUS_OK.
+ */
+
+NTSTATUS ntlmssp_client_challenge(struct gensec_security *gensec_security,
+				  TALLOC_CTX *out_mem_ctx,
+				  const DATA_BLOB in, DATA_BLOB *out)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+	struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
+	uint32_t chal_flags, ntlmssp_command, unkn1 = 0, unkn2 = 0;
+	DATA_BLOB server_domain_blob;
+	DATA_BLOB challenge_blob;
+	DATA_BLOB target_info = data_blob(NULL, 0);
+	char *server_domain;
+	const char *chal_parse_string;
+	const char *chal_parse_string_short = NULL;
+	const char *auth_gen_string;
+	DATA_BLOB lm_response = data_blob(NULL, 0);
+	DATA_BLOB nt_response = data_blob(NULL, 0);
+	DATA_BLOB session_key = data_blob(NULL, 0);
+	DATA_BLOB lm_session_key = data_blob(NULL, 0);
+	DATA_BLOB encrypted_session_key = data_blob(NULL, 0);
+	NTSTATUS nt_status;
+	int flags = 0;
+	const char *user = NULL, *domain = NULL, *workstation = NULL;
+	bool is_anonymous = false;
+	const DATA_BLOB version_blob = ntlmssp_version_blob();
+	const NTTIME *server_timestamp = NULL;
+	uint8_t mic_buffer[NTLMSSP_MIC_SIZE] = { 0, };
+	DATA_BLOB mic_blob = data_blob_const(mic_buffer, sizeof(mic_buffer));
+	gnutls_hmac_hd_t hmac_hnd = NULL;
+	int rc;
+
+	TALLOC_CTX *mem_ctx = talloc_new(out_mem_ctx);
+	if (!mem_ctx) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	if (!msrpc_parse(mem_ctx,
+			 &in, "CdBd",
+			 "NTLMSSP",
+			 &ntlmssp_command,
+			 &server_domain_blob,
+			 &chal_flags)) {
+		DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#1)\n"));
+		dump_data(2, in.data, in.length);
+		talloc_free(mem_ctx);
+
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	data_blob_free(&server_domain_blob);
+
+	DEBUG(3, ("Got challenge flags:\n"));
+	debug_ntlmssp_flags(chal_flags);
+
+	nt_status = ntlmssp_handle_neg_flags(ntlmssp_state,
+					     chal_flags, "challenge");
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		return nt_status;
+	}
+
+	if (ntlmssp_state->unicode) {
+		if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO) {
+			chal_parse_string = "CdUdbddB";
+		} else {
+			chal_parse_string = "CdUdbdd";
+			chal_parse_string_short = "CdUdb";
+		}
+		auth_gen_string = "CdBBUUUBdbb";
+	} else {
+		if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO) {
+			chal_parse_string = "CdAdbddB";
+		} else {
+			chal_parse_string = "CdAdbdd";
+			chal_parse_string_short = "CdAdb";
+		}
+
+		auth_gen_string = "CdBBAAABdbb";
+	}
+
+	if (!msrpc_parse(mem_ctx,
+			 &in, chal_parse_string,
+			 "NTLMSSP",
+			 &ntlmssp_command,
+			 &server_domain,
+			 &chal_flags,
+			 &challenge_blob, 8,
+			 &unkn1, &unkn2,
+			 &target_info)) {
+
+		bool ok = false;
+
+		DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#2)\n"));
+
+		if (chal_parse_string_short != NULL) {
+			/*
+			 * In the case where NTLMSSP_NEGOTIATE_TARGET_INFO
+			 * is not used, some NTLMSSP servers don't return
+			 * the unused unkn1 and unkn2 fields.
+			 * See bug:
+			 * https://bugzilla.samba.org/show_bug.cgi?id=10016
+			 * for packet traces.
+			 * Try and parse again without them.
+			 */
+			ok = msrpc_parse(mem_ctx,
+				&in, chal_parse_string_short,
+				"NTLMSSP",
+				&ntlmssp_command,
+				&server_domain,
+				&chal_flags,
+				&challenge_blob, 8);
+			if (!ok) {
+				DEBUG(1, ("Failed to short parse "
+					"the NTLMSSP Challenge: (#2)\n"));
+			}
+		}
+
+		if (!ok) {
+			dump_data(2, in.data, in.length);
+			talloc_free(mem_ctx);
+			return NT_STATUS_INVALID_PARAMETER;
+		}
+	}
+
+	if (DEBUGLEVEL >= 10) {
+		struct CHALLENGE_MESSAGE *challenge =
+			talloc(ntlmssp_state, struct CHALLENGE_MESSAGE);
+		if (challenge != NULL) {
+			NTSTATUS status;
+			challenge->NegotiateFlags = chal_flags;
+			status = ntlmssp_pull_CHALLENGE_MESSAGE(
+					&in, challenge, challenge);
+			if (NT_STATUS_IS_OK(status)) {
+				NDR_PRINT_DEBUG(CHALLENGE_MESSAGE,
+						challenge);
+			}
+			TALLOC_FREE(challenge);
+		}
+	}
+
+	if (chal_flags & NTLMSSP_TARGET_TYPE_SERVER) {
+		ntlmssp_state->server.is_standalone = true;
+	} else {
+		ntlmssp_state->server.is_standalone = false;
+	}
+	/* TODO: parse struct_blob and fill in the rest */
+	ntlmssp_state->server.netbios_name = "";
+	ntlmssp_state->server.netbios_domain = talloc_move(ntlmssp_state, &server_domain);
+	ntlmssp_state->server.dns_name = "";
+	ntlmssp_state->server.dns_domain = "";
+
+	if (challenge_blob.length != 8) {
+		talloc_free(mem_ctx);
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	is_anonymous = cli_credentials_is_anonymous(gensec_security->credentials);
+	cli_credentials_get_ntlm_username_domain(gensec_security->credentials, mem_ctx,
+						 &user, &domain);
+
+	workstation = cli_credentials_get_workstation(gensec_security->credentials);
+
+	if (user == NULL) {
+		DEBUG(10, ("User is NULL, returning INVALID_PARAMETER\n"));
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	if (domain == NULL) {
+		DEBUG(10, ("Domain is NULL, returning INVALID_PARAMETER\n"));
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	if (workstation == NULL) {
+		DEBUG(10, ("Workstation is NULL, returning INVALID_PARAMETER\n"));
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	if (is_anonymous) {
+		ntlmssp_state->neg_flags |= NTLMSSP_ANONYMOUS;
+		/*
+		 * don't use the ccache for anonymous auth
+		 */
+		ntlmssp_state->use_ccache = false;
+	}
+	if (ntlmssp_state->use_ccache) {
+		struct samr_Password *nt_hash = NULL;
+
+		/*
+		 * If we have a password given we don't
+		 * use the ccache
+		 */
+		nt_hash = cli_credentials_get_nt_hash(gensec_security->credentials,
+						      mem_ctx);
+		if (nt_hash != NULL) {
+			ZERO_STRUCTP(nt_hash);
+			TALLOC_FREE(nt_hash);
+			ntlmssp_state->use_ccache = false;
+		}
+	}
+
+	if (ntlmssp_state->use_ccache) {
+		struct wbcCredentialCacheParams params;
+		struct wbcCredentialCacheInfo *info = NULL;
+		struct wbcAuthErrorInfo *error = NULL;
+		struct wbcNamedBlob auth_blobs[2];
+		const struct wbcBlob *wbc_auth_blob = NULL;
+		const struct wbcBlob *wbc_session_key = NULL;
+		wbcErr wbc_status;
+		size_t i;
+		bool new_spnego = false;
+
+		params.account_name = user;
+		params.domain_name = domain;
+		params.level = WBC_CREDENTIAL_CACHE_LEVEL_NTLMSSP;
+
+		auth_blobs[0].name = "challenge_blob";
+		auth_blobs[0].flags = 0;
+		auth_blobs[0].blob.data = in.data;
+		auth_blobs[0].blob.length = in.length;
+		auth_blobs[1].name = "negotiate_blob";
+		auth_blobs[1].flags = 0;
+		auth_blobs[1].blob.data = ntlmssp_state->negotiate_blob.data;
+		auth_blobs[1].blob.length = ntlmssp_state->negotiate_blob.length;
+		params.num_blobs = ARRAY_SIZE(auth_blobs);
+		params.blobs = auth_blobs;
+
+		wbc_status = wbcCredentialCache(&params, &info, &error);
+		wbcFreeMemory(error);
+		if (!WBC_ERROR_IS_OK(wbc_status)) {
+			return NT_STATUS_WRONG_CREDENTIAL_HANDLE;
+		}
+
+		for (i=0; i<info->num_blobs; i++) {
+			if (strequal(info->blobs[i].name, "auth_blob")) {
+				wbc_auth_blob = &info->blobs[i].blob;
+			}
+			if (strequal(info->blobs[i].name, "session_key")) {
+				wbc_session_key = &info->blobs[i].blob;
+			}
+			if (strequal(info->blobs[i].name, "new_spnego")) {
+				new_spnego = true;
+			}
+		}
+		if ((wbc_auth_blob == NULL) || (wbc_session_key == NULL)) {
+			wbcFreeMemory(info);
+			return NT_STATUS_WRONG_CREDENTIAL_HANDLE;
+		}
+
+		session_key = data_blob_talloc(mem_ctx,
+					       wbc_session_key->data,
+					       wbc_session_key->length);
+		if (session_key.length != wbc_session_key->length) {
+			wbcFreeMemory(info);
+			return NT_STATUS_NO_MEMORY;
+		}
+		*out = data_blob_talloc(mem_ctx,
+					wbc_auth_blob->data,
+					wbc_auth_blob->length);
+		if (out->length != wbc_auth_blob->length) {
+			wbcFreeMemory(info);
+			return NT_STATUS_NO_MEMORY;
+		}
+		ntlmssp_state->new_spnego = new_spnego;
+
+		wbcFreeMemory(info);
+		goto done;
+	}
+
+	if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
+		flags |= CLI_CRED_NTLM2;
+	}
+	if (ntlmssp_state->use_ntlmv2) {
+		flags |= CLI_CRED_NTLMv2_AUTH;
+	}
+	if (ntlmssp_state->use_nt_response) {
+		flags |= CLI_CRED_NTLM_AUTH;
+	}
+	if (ntlmssp_state->allow_lm_response) {
+		flags |= CLI_CRED_LANMAN_AUTH;
+	}
+
+	if (target_info.length != 0 && !is_anonymous) {
+		struct AV_PAIR *pairs = NULL;
+		uint32_t count = 0;
+		enum ndr_err_code err;
+		struct AV_PAIR *timestamp = NULL;
+		struct AV_PAIR *eol = NULL;
+		uint32_t i = 0;
+		const char *service = NULL;
+		const char *hostname = NULL;
+
+		err = ndr_pull_struct_blob(&target_info,
+					ntlmssp_state,
+					&ntlmssp_state->server.av_pair_list,
+					(ndr_pull_flags_fn_t)ndr_pull_AV_PAIR_LIST);
+		if (!NDR_ERR_CODE_IS_SUCCESS(err)) {
+			return ndr_map_error2ntstatus(err);
+		}
+
+		count = ntlmssp_state->server.av_pair_list.count;
+		/*
+		 * We need room for Flags, SingleHost,
+		 * ChannelBindings and Target
+		 */
+		pairs = talloc_zero_array(ntlmssp_state, struct AV_PAIR,
+					  count + 4);
+		if (pairs == NULL) {
+			return NT_STATUS_NO_MEMORY;
+		}
+
+		for (i = 0; i < count; i++) {
+			pairs[i] = ntlmssp_state->server.av_pair_list.pair[i];
+		}
+
+		ntlmssp_state->client.av_pair_list.count = count;
+		ntlmssp_state->client.av_pair_list.pair = pairs;
+
+		eol = ndr_ntlmssp_find_av(&ntlmssp_state->client.av_pair_list,
+					  MsvAvEOL);
+		if (eol == NULL) {
+			return NT_STATUS_INVALID_PARAMETER;
+		}
+
+		timestamp = ndr_ntlmssp_find_av(&ntlmssp_state->client.av_pair_list,
+						MsvAvTimestamp);
+		if (timestamp != NULL) {
+			uint32_t sign_features =
+					GENSEC_FEATURE_SESSION_KEY |
+					GENSEC_FEATURE_SIGN |
+					GENSEC_FEATURE_SEAL;
+
+			server_timestamp = &timestamp->Value.AvTimestamp;
+
+			if (ntlmssp_state->force_old_spnego) {
+				sign_features = 0;
+			}
+
+			if (gensec_security->want_features & sign_features) {
+				struct AV_PAIR *av_flags = NULL;
+
+				av_flags = ndr_ntlmssp_find_av(&ntlmssp_state->client.av_pair_list,
+							       MsvAvFlags);
+				if (av_flags == NULL) {
+					av_flags = eol;
+					eol++;
+					count++;
+					*eol = *av_flags;
+					av_flags->AvId = MsvAvFlags;
+					av_flags->Value.AvFlags = 0;
+				}
+
+				av_flags->Value.AvFlags |= NTLMSSP_AVFLAG_MIC_IN_AUTHENTICATE_MESSAGE;
+				ntlmssp_state->new_spnego = true;
+			}
+		}
+
+		{
+			struct AV_PAIR *SingleHost = NULL;
+
+			SingleHost = eol;
+			eol++;
+			count++;
+			*eol = *SingleHost;
+
+			/*
+			 * This is not really used, but we want to
+			 * add some more random bytes and match
+			 * Windows.
+			 */
+			SingleHost->AvId = MsvAvSingleHost;
+			SingleHost->Value.AvSingleHost.token_info.Flags = 0;
+			SingleHost->Value.AvSingleHost.token_info.TokenIL = 0;
+			generate_random_buffer(SingleHost->Value.AvSingleHost.token_info.MachineId,
+					sizeof(SingleHost->Value.AvSingleHost.token_info.MachineId));
+			SingleHost->Value.AvSingleHost.remaining = data_blob_null;
+		}
+
+		{
+			struct AV_PAIR *ChannelBindings = NULL;
+
+			ChannelBindings = eol;
+			eol++;
+			count++;
+			*eol = *ChannelBindings;
+
+			/*
+			 * gensec doesn't support channel bindings yet,
+			 * but we want to match Windows on the wire
+			 */
+			ChannelBindings->AvId = MsvChannelBindings;
+			memset(ChannelBindings->Value.ChannelBindings, 0,
+			       sizeof(ChannelBindings->Value.ChannelBindings));
+		}
+
+		service = gensec_get_target_service(gensec_security);
+		hostname = gensec_get_target_hostname(gensec_security);
+		if (service != NULL && hostname != NULL) {
+			struct AV_PAIR *target = NULL;
+
+			target = eol;
+			eol++;
+			count++;
+			*eol = *target;
+
+			target->AvId = MsvAvTargetName;
+			target->Value.AvTargetName = talloc_asprintf(pairs, "%s/%s",
+								     service,
+								     hostname);
+			if (target->Value.AvTargetName == NULL) {
+				return NT_STATUS_NO_MEMORY;
+			}
+		}
+
+		ntlmssp_state->client.av_pair_list.count = count;
+		ntlmssp_state->client.av_pair_list.pair = pairs;
+
+		err = ndr_push_struct_blob(&target_info,
+					ntlmssp_state,
+					&ntlmssp_state->client.av_pair_list,
+					(ndr_push_flags_fn_t)ndr_push_AV_PAIR_LIST);
+		if (!NDR_ERR_CODE_IS_SUCCESS(err)) {
+			return NT_STATUS_NO_MEMORY;
+		}
+	}
+
+	nt_status = cli_credentials_get_ntlm_response(gensec_security->credentials, mem_ctx,
+						      &flags, challenge_blob,
+						      server_timestamp, target_info,
+						      &lm_response, &nt_response,
+						      &lm_session_key, &session_key);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		return nt_status;
+	}
+
+	if (!(flags & CLI_CRED_LANMAN_AUTH)) {
+		/* LM Key is still possible, just silly, so we do not
+		 * allow it. Fortunetly all LM crypto is off by
+		 * default and we require command line options to end
+		 * up here */
+		ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+	}
+
+	if (!(flags & CLI_CRED_NTLM2)) {
+		/* NTLM2 is incompatible... */
+		ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
+	}
+
+	if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
+	    && ntlmssp_state->allow_lm_key && lm_session_key.length == 16) {
+		DATA_BLOB new_session_key = data_blob_talloc(mem_ctx, NULL, 16);
+		if (lm_response.length == 24) {
+			nt_status = SMBsesskeygen_lm_sess_key(lm_session_key.data,
+							      lm_response.data,
+							      new_session_key.data);
+			if (!NT_STATUS_IS_OK(nt_status)) {
+				return nt_status;
+			}
+		} else {
+			static const uint8_t zeros[24];
+			nt_status = SMBsesskeygen_lm_sess_key(lm_session_key.data,
+                                                              zeros,
+                                                              new_session_key.data);
+			if (!NT_STATUS_IS_OK(nt_status)) {
+				return nt_status;
+			}
+		}
+		session_key = new_session_key;
+		dump_data_pw("LM session key\n", session_key.data, session_key.length);
+	}
+
+
+	/* Key exchange encryptes a new client-generated session key with
+	   the password-derived key */
+	if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
+		/* Make up a new session key */
+		uint8_t client_session_key[16];
+		gnutls_cipher_hd_t cipher_hnd;
+		gnutls_datum_t enc_session_key = {
+			.data = session_key.data,
+			.size = session_key.length,
+		};
+
+		generate_random_buffer(client_session_key, sizeof(client_session_key));
+
+		/* Encrypt the new session key with the old one */
+		encrypted_session_key = data_blob_talloc(ntlmssp_state,
+							 client_session_key, sizeof(client_session_key));
+		dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key.data, encrypted_session_key.length);
+
+		rc = gnutls_cipher_init(&cipher_hnd,
+					GNUTLS_CIPHER_ARCFOUR_128,
+					&enc_session_key,
+					NULL);
+		if (rc < 0) {
+			nt_status = gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+			ZERO_ARRAY(client_session_key);
+			goto done;
+		}
+		rc = gnutls_cipher_encrypt(cipher_hnd,
+					   encrypted_session_key.data,
+					   encrypted_session_key.length);
+		gnutls_cipher_deinit(cipher_hnd);
+		if (rc < 0) {
+			nt_status = gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+			ZERO_ARRAY(client_session_key);
+			goto done;
+		}
+
+		dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length);
+
+		/* Mark the new session key as the 'real' session key */
+		session_key = data_blob_talloc(mem_ctx, client_session_key, sizeof(client_session_key));
+		ZERO_ARRAY(client_session_key);
+	}
+
+	/* this generates the actual auth packet */
+	nt_status = msrpc_gen(mem_ctx,
+		       out, auth_gen_string,
+		       "NTLMSSP",
+		       NTLMSSP_AUTH,
+		       lm_response.data, lm_response.length,
+		       nt_response.data, nt_response.length,
+		       domain,
+		       user,
+		       workstation,
+		       encrypted_session_key.data, encrypted_session_key.length,
+		       ntlmssp_state->neg_flags,
+		       version_blob.data, version_blob.length,
+		       mic_blob.data, mic_blob.length);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		talloc_free(mem_ctx);
+		return nt_status;
+	}
+
+	if (DEBUGLEVEL >= 10) {
+		struct AUTHENTICATE_MESSAGE *authenticate =
+			talloc(ntlmssp_state, struct AUTHENTICATE_MESSAGE);
+		if (authenticate != NULL) {
+			NTSTATUS status;
+			authenticate->NegotiateFlags = ntlmssp_state->neg_flags;
+			status = ntlmssp_pull_AUTHENTICATE_MESSAGE(
+				out, authenticate, authenticate);
+			if (NT_STATUS_IS_OK(status)) {
+				NDR_PRINT_DEBUG(AUTHENTICATE_MESSAGE,
+						authenticate);
+			}
+			TALLOC_FREE(authenticate);
+		}
+	}
+
+	/*
+	 * We always include the MIC, even without:
+	 * av_flags->Value.AvFlags |= NTLMSSP_AVFLAG_MIC_IN_AUTHENTICATE_MESSAGE;
+	 * ntlmssp_state->new_spnego = true;
+	 *
+	 * This matches a Windows client.
+	 */
+	rc = gnutls_hmac_init(&hmac_hnd,
+			      GNUTLS_MAC_MD5,
+			 session_key.data,
+			 MIN(session_key.length, 64));
+	if (rc < 0) {
+		nt_status = gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		goto done;
+	}
+
+	rc = gnutls_hmac(hmac_hnd,
+			 ntlmssp_state->negotiate_blob.data,
+			 ntlmssp_state->negotiate_blob.length);
+	if (rc < 0) {
+		gnutls_hmac_deinit(hmac_hnd, NULL);
+		nt_status = gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		goto done;
+	}
+	rc = gnutls_hmac(hmac_hnd, in.data, in.length);
+	if (rc < 0) {
+		gnutls_hmac_deinit(hmac_hnd, NULL);
+		nt_status = gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		goto done;
+	}
+	rc = gnutls_hmac(hmac_hnd, out->data, out->length);
+	if (rc < 0) {
+		gnutls_hmac_deinit(hmac_hnd, NULL);
+		nt_status = gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		goto done;
+	}
+
+	gnutls_hmac_deinit(hmac_hnd, mic_buffer);
+
+	memcpy(out->data + NTLMSSP_MIC_OFFSET, mic_buffer, NTLMSSP_MIC_SIZE);
+	ZERO_ARRAY(mic_buffer);
+
+	nt_status = NT_STATUS_OK;
+done:
+	ZERO_ARRAY_LEN(ntlmssp_state->negotiate_blob.data,
+		       ntlmssp_state->negotiate_blob.length);
+	data_blob_free(&ntlmssp_state->negotiate_blob);
+
+	ntlmssp_state->session_key = session_key;
+	talloc_steal(ntlmssp_state, session_key.data);
+
+	DEBUG(3, ("NTLMSSP: Set final flags:\n"));
+	debug_ntlmssp_flags(ntlmssp_state->neg_flags);
+
+	talloc_steal(out_mem_ctx, out->data);
+
+	ntlmssp_state->expected_state = NTLMSSP_DONE;
+
+	if (gensec_ntlmssp_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
+		nt_status = ntlmssp_sign_init(ntlmssp_state);
+		if (!NT_STATUS_IS_OK(nt_status)) {
+			DEBUG(1, ("Could not setup NTLMSSP signing/sealing system (error was: %s)\n",
+				  nt_errstr(nt_status)));
+			talloc_free(mem_ctx);
+			return nt_status;
+		}
+	}
+
+	talloc_free(mem_ctx);
+	return nt_status;
+}
+
+NTSTATUS gensec_ntlmssp_client_start(struct gensec_security *gensec_security)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp;
+	struct ntlmssp_state *ntlmssp_state;
+	NTSTATUS nt_status;
+
+	nt_status = gensec_ntlmssp_start(gensec_security);
+	NT_STATUS_NOT_OK_RETURN(nt_status);
+
+	gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+
+	ntlmssp_state = talloc_zero(gensec_ntlmssp,
+				    struct ntlmssp_state);
+	if (!ntlmssp_state) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	gensec_ntlmssp->ntlmssp_state = ntlmssp_state;
+
+	ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
+
+	ntlmssp_state->role = NTLMSSP_CLIENT;
+
+	ntlmssp_state->client.netbios_domain = lpcfg_workgroup(gensec_security->settings->lp_ctx);
+	ntlmssp_state->client.netbios_name = cli_credentials_get_workstation(gensec_security->credentials);
+
+	ntlmssp_state->unicode = gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "unicode", true);
+
+	ntlmssp_state->use_nt_response = \
+		gensec_setting_bool(gensec_security->settings,
+				    "ntlmssp_client",
+				    "send_nt_response",
+				    true);
+
+	ntlmssp_state->allow_lm_response = lpcfg_client_lanman_auth(gensec_security->settings->lp_ctx);
+
+	ntlmssp_state->allow_lm_key = (ntlmssp_state->allow_lm_response
+					      && (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "allow_lm_key", false)
+						  || gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "lm_key", false)));
+
+	ntlmssp_state->use_ntlmv2 = lpcfg_client_ntlmv2_auth(gensec_security->settings->lp_ctx);
+
+	ntlmssp_state->force_old_spnego = gensec_setting_bool(gensec_security->settings,
+						"ntlmssp_client", "force_old_spnego", false);
+
+	ntlmssp_state->expected_state = NTLMSSP_INITIAL;
+
+	ntlmssp_state->neg_flags =
+		NTLMSSP_NEGOTIATE_NTLM |
+		NTLMSSP_NEGOTIATE_VERSION |
+		NTLMSSP_REQUEST_TARGET;
+
+	if (ntlmssp_state->unicode) {
+		ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
+	} else {
+		ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
+	}
+
+	if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "128bit", true)) {
+		ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_128;
+	}
+
+	if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "56bit", false)) {
+		ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_56;
+	}
+
+	if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "lm_key", false)) {
+		ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
+	}
+
+	if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "keyexchange", true)) {
+		ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_KEY_EXCH;
+	}
+
+	if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "alwayssign", true)) {
+		ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
+	}
+
+	if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "ntlm2", true)) {
+		ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
+	} else {
+		/* apparently we can't do ntlmv2 if we don't do ntlm2 */
+		ntlmssp_state->use_ntlmv2 = false;
+	}
+
+	if (ntlmssp_state->use_ntlmv2) {
+		ntlmssp_state->required_flags |= NTLMSSP_NEGOTIATE_NTLM2;
+		ntlmssp_state->allow_lm_response = false;
+		ntlmssp_state->allow_lm_key = false;
+	}
+
+	if (ntlmssp_state->allow_lm_key) {
+		ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
+	}
+
+	if (gensec_security->want_features & GENSEC_FEATURE_SESSION_KEY) {
+		/*
+		 * We need to set this to allow a later SetPassword
+		 * via the SAMR pipe to succeed. Strange.... We could
+		 * also add  NTLMSSP_NEGOTIATE_SEAL here. JRA.
+		 *
+		 * Without this, Windows will not create the master key
+		 * that it thinks is only used for NTLMSSP signing and
+		 * sealing.  (It is actually pulled out and used directly)
+		 *
+		 * We don't require this here as some servers (e.g. NetAPP)
+		 * doesn't support this.
+		 */
+		ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
+	}
+	if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
+		ntlmssp_state->required_flags |= NTLMSSP_NEGOTIATE_SIGN;
+
+		if (gensec_security->want_features & GENSEC_FEATURE_LDAP_STYLE) {
+			/*
+			 * We need to handle NTLMSSP_NEGOTIATE_SIGN as
+			 * NTLMSSP_NEGOTIATE_SEAL if GENSEC_FEATURE_LDAP_STYLE
+			 * is requested.
+			 */
+			ntlmssp_state->force_wrap_seal = true;
+		}
+	}
+	if (ntlmssp_state->force_wrap_seal) {
+		bool ret;
+
+		/*
+		 * We want also work against old Samba servers
+		 * which didn't had GENSEC_FEATURE_LDAP_STYLE
+		 * we negotiate SEAL too. We may remove this
+		 * in a few years. As all servers should have
+		 * GENSEC_FEATURE_LDAP_STYLE by then.
+		 */
+		ret = gensec_setting_bool(gensec_security->settings,
+					  "ntlmssp_client",
+					  "ldap_style_send_seal",
+					  true);
+		if (ret) {
+			ntlmssp_state->required_flags |= NTLMSSP_NEGOTIATE_SEAL;
+		}
+	}
+	if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
+		ntlmssp_state->required_flags |= NTLMSSP_NEGOTIATE_SIGN;
+		ntlmssp_state->required_flags |= NTLMSSP_NEGOTIATE_SEAL;
+	}
+	if (gensec_security->want_features & GENSEC_FEATURE_NTLM_CCACHE) {
+		ntlmssp_state->use_ccache = true;
+	}
+
+	ntlmssp_state->neg_flags |= ntlmssp_state->required_flags;
+	ntlmssp_state->conf_flags = ntlmssp_state->neg_flags;
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS gensec_ntlmssp_resume_ccache_start(struct gensec_security *gensec_security)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp = NULL;
+	NTSTATUS status;
+
+	status = gensec_ntlmssp_client_start(gensec_security);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+
+	gensec_ntlmssp = talloc_get_type_abort(gensec_security->private_data,
+					       struct gensec_ntlmssp_context);
+	gensec_ntlmssp->ntlmssp_state->use_ccache = false;
+	gensec_ntlmssp->ntlmssp_state->resume_ccache = true;
+	gensec_ntlmssp->ntlmssp_state->expected_state = NTLMSSP_NEGOTIATE;
+
+	return NT_STATUS_OK;
+}
diff --git a/auth/ntlmssp/ntlmssp_ndr.c b/auth/ntlmssp/ntlmssp_ndr.c
new file mode 100644
index 0000000..ea5d6f0
--- /dev/null
+++ b/auth/ntlmssp/ntlmssp_ndr.c
@@ -0,0 +1,134 @@
+/*
+   Unix SMB/Netbios implementation.
+   NTLMSSP ndr functions
+
+   Copyright (C) Guenther Deschner 2009
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "../librpc/gen_ndr/ndr_ntlmssp.h"
+#include "ntlmssp_ndr.h"
+
+#define NTLMSSP_PULL_MESSAGE(type, blob, mem_ctx, r) \
+do { \
+	enum ndr_err_code __ndr_err; \
+	ZERO_STRUCTP(r); /* in order to deal with unset neg flags */\
+	__ndr_err = ndr_pull_struct_blob(blob, mem_ctx, r, \
+			(ndr_pull_flags_fn_t)ndr_pull_ ##type); \
+	if (!NDR_ERR_CODE_IS_SUCCESS(__ndr_err)) { \
+		return ndr_map_error2ntstatus(__ndr_err); \
+	} \
+	if (!mem_equal_const_time(r->Signature, "NTLMSSP\0", 8)) { \
+		return NT_STATUS_INVALID_PARAMETER; \
+	} \
+	return NT_STATUS_OK; \
+} while(0);
+
+#define NTLMSSP_PUSH_MESSAGE(type, blob, mem_ctx, r) \
+do { \
+	enum ndr_err_code __ndr_err; \
+	__ndr_err = ndr_push_struct_blob(blob, mem_ctx, r, \
+			(ndr_push_flags_fn_t)ndr_push_ ##type); \
+	if (!NDR_ERR_CODE_IS_SUCCESS(__ndr_err)) { \
+		return ndr_map_error2ntstatus(__ndr_err); \
+	} \
+	return NT_STATUS_OK; \
+} while(0);
+
+
+/**
+ * Pull NTLMSSP NEGOTIATE_MESSAGE struct from a blob
+ * @param blob The plain packet blob
+ * @param mem_ctx A talloc context
+ * @param r Pointer to a NTLMSSP NEGOTIATE_MESSAGE structure
+ */
+
+NTSTATUS ntlmssp_pull_NEGOTIATE_MESSAGE(const DATA_BLOB *blob,
+					TALLOC_CTX *mem_ctx,
+					struct NEGOTIATE_MESSAGE *r)
+{
+	NTLMSSP_PULL_MESSAGE(NEGOTIATE_MESSAGE, blob, mem_ctx, r);
+}
+
+/**
+ * Pull NTLMSSP CHALLENGE_MESSAGE struct from a blob
+ * @param blob The plain packet blob
+ * @param mem_ctx A talloc context
+ * @param r Pointer to a NTLMSSP CHALLENGE_MESSAGE structure
+ */
+
+NTSTATUS ntlmssp_pull_CHALLENGE_MESSAGE(const DATA_BLOB *blob,
+					TALLOC_CTX *mem_ctx,
+					struct CHALLENGE_MESSAGE *r)
+{
+	NTLMSSP_PULL_MESSAGE(CHALLENGE_MESSAGE, blob, mem_ctx, r);
+}
+
+/**
+ * Pull NTLMSSP AUTHENTICATE_MESSAGE struct from a blob
+ * @param blob The plain packet blob
+ * @param mem_ctx A talloc context
+ * @param r Pointer to a NTLMSSP AUTHENTICATE_MESSAGE structure
+ */
+
+NTSTATUS ntlmssp_pull_AUTHENTICATE_MESSAGE(const DATA_BLOB *blob,
+					   TALLOC_CTX *mem_ctx,
+					   struct AUTHENTICATE_MESSAGE *r)
+{
+	NTLMSSP_PULL_MESSAGE(AUTHENTICATE_MESSAGE, blob, mem_ctx, r);
+}
+
+/**
+ * Push NTLMSSP NEGOTIATE_MESSAGE struct into a blob
+ * @param blob The plain packet blob
+ * @param mem_ctx A talloc context
+ * @param r Pointer to a NTLMSSP NEGOTIATE_MESSAGE structure
+ */
+
+NTSTATUS ntlmssp_push_NEGOTIATE_MESSAGE(DATA_BLOB *blob,
+					TALLOC_CTX *mem_ctx,
+					const struct NEGOTIATE_MESSAGE *r)
+{
+	NTLMSSP_PUSH_MESSAGE(NEGOTIATE_MESSAGE, blob, mem_ctx, r);
+}
+
+/**
+ * Push NTLMSSP CHALLENGE_MESSAGE struct into a blob
+ * @param blob The plain packet blob
+ * @param mem_ctx A talloc context
+ * @param r Pointer to a NTLMSSP CHALLENGE_MESSAGE structure
+ */
+
+NTSTATUS ntlmssp_push_CHALLENGE_MESSAGE(DATA_BLOB *blob,
+					TALLOC_CTX *mem_ctx,
+					const struct CHALLENGE_MESSAGE *r)
+{
+	NTLMSSP_PUSH_MESSAGE(CHALLENGE_MESSAGE, blob, mem_ctx, r);
+}
+
+/**
+ * Push NTLMSSP AUTHENTICATE_MESSAGE struct into a blob
+ * @param blob The plain packet blob
+ * @param mem_ctx A talloc context
+ * @param r Pointer to a NTLMSSP AUTHENTICATE_MESSAGE structure
+ */
+
+NTSTATUS ntlmssp_push_AUTHENTICATE_MESSAGE(DATA_BLOB *blob,
+					   TALLOC_CTX *mem_ctx,
+					   const struct AUTHENTICATE_MESSAGE *r)
+{
+	NTLMSSP_PUSH_MESSAGE(AUTHENTICATE_MESSAGE, blob, mem_ctx, r);
+}
diff --git a/auth/ntlmssp/ntlmssp_ndr.h b/auth/ntlmssp/ntlmssp_ndr.h
new file mode 100644
index 0000000..e619231
--- /dev/null
+++ b/auth/ntlmssp/ntlmssp_ndr.h
@@ -0,0 +1,38 @@
+/*
+   Unix SMB/Netbios implementation.
+   NTLMSSP ndr functions
+
+   Copyright (C) Guenther Deschner 2009
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+NTSTATUS ntlmssp_pull_NEGOTIATE_MESSAGE(const DATA_BLOB *blob,
+					TALLOC_CTX *mem_ctx,
+					struct NEGOTIATE_MESSAGE *r);
+NTSTATUS ntlmssp_pull_CHALLENGE_MESSAGE(const DATA_BLOB *blob,
+					TALLOC_CTX *mem_ctx,
+					struct CHALLENGE_MESSAGE *r);
+NTSTATUS ntlmssp_pull_AUTHENTICATE_MESSAGE(const DATA_BLOB *blob,
+					   TALLOC_CTX *mem_ctx,
+					   struct AUTHENTICATE_MESSAGE *r);
+NTSTATUS ntlmssp_push_NEGOTIATE_MESSAGE(DATA_BLOB *blob,
+					TALLOC_CTX *mem_ctx,
+					const struct NEGOTIATE_MESSAGE *r);
+NTSTATUS ntlmssp_push_CHALLENGE_MESSAGE(DATA_BLOB *blob,
+					TALLOC_CTX *mem_ctx,
+					const struct CHALLENGE_MESSAGE *r);
+NTSTATUS ntlmssp_push_AUTHENTICATE_MESSAGE(DATA_BLOB *blob,
+					   TALLOC_CTX *mem_ctx,
+					   const struct AUTHENTICATE_MESSAGE *r);
diff --git a/auth/ntlmssp/ntlmssp_private.h b/auth/ntlmssp/ntlmssp_private.h
new file mode 100644
index 0000000..4d84e33
--- /dev/null
+++ b/auth/ntlmssp/ntlmssp_private.h
@@ -0,0 +1,192 @@
+/*
+ *  Unix SMB/CIFS implementation.
+ *  Version 3.0
+ *  NTLMSSP Signing routines
+ *  Copyright (C) Andrew Bartlett 2003-2005
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* For structures internal to the NTLMSSP implementation that should not be exposed */
+
+#include <gnutls/gnutls.h>
+#include <gnutls/crypto.h>
+
+struct auth_session_info;
+
+struct ntlmssp_crypt_direction {
+	uint32_t seq_num;
+	uint8_t sign_key[16];
+	gnutls_cipher_hd_t seal_state;
+};
+
+union ntlmssp_crypt_state {
+	/* NTLM */
+	struct ntlmssp_crypt_direction ntlm;
+
+	/* NTLM2 */
+	struct {
+		struct ntlmssp_crypt_direction sending;
+		struct ntlmssp_crypt_direction receiving;
+	} ntlm2;
+};
+
+struct gensec_ntlmssp_context {
+	/* For GENSEC users */
+	void *server_returned_info;
+
+	/* used by both client and server implementation */
+	struct ntlmssp_state *ntlmssp_state;
+};
+
+/* The following definitions come from auth/ntlmssp_util.c  */
+
+void debug_ntlmssp_flags(uint32_t neg_flags);
+NTSTATUS ntlmssp_handle_neg_flags(struct ntlmssp_state *ntlmssp_state,
+				  uint32_t neg_flags, const char *name);
+const DATA_BLOB ntlmssp_version_blob(void);
+
+/* The following definitions come from auth/ntlmssp_server.c  */
+
+const char *ntlmssp_target_name(struct ntlmssp_state *ntlmssp_state,
+				uint32_t neg_flags, uint32_t *chal_flags);
+NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state,
+				  TALLOC_CTX *out_mem_ctx,
+				  const DATA_BLOB in, DATA_BLOB *out);
+NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state,
+			     TALLOC_CTX *out_mem_ctx,
+			     const DATA_BLOB request, DATA_BLOB *reply);
+/* The following definitions come from auth/ntlmssp/ntlmssp_client.c  */
+
+
+/**
+ * Next state function for the Initial packet
+ *
+ * @param ntlmssp_state NTLMSSP State
+ * @param out_mem_ctx The DATA_BLOB *out will be allocated on this context
+ * @param in A NULL data blob (input ignored)
+ * @param out The initial negotiate request to the server, as an talloc()ed DATA_BLOB, on out_mem_ctx
+ * @return Errors or NT_STATUS_OK.
+ */
+NTSTATUS ntlmssp_client_initial(struct gensec_security *gensec_security,
+				TALLOC_CTX *out_mem_ctx,
+				DATA_BLOB in, DATA_BLOB *out) ;
+
+NTSTATUS gensec_ntlmssp_resume_ccache(struct gensec_security *gensec_security,
+				TALLOC_CTX *out_mem_ctx,
+				DATA_BLOB in, DATA_BLOB *out);
+
+/**
+ * Next state function for the Challenge Packet.  Generate an auth packet.
+ *
+ * @param gensec_security GENSEC state
+ * @param out_mem_ctx Memory context for *out
+ * @param in The server challnege, as a DATA_BLOB.  reply.data must be NULL
+ * @param out The next request (auth packet) to the server, as an allocated DATA_BLOB, on the out_mem_ctx context
+ * @return Errors or NT_STATUS_OK.
+ */
+NTSTATUS ntlmssp_client_challenge(struct gensec_security *gensec_security,
+				  TALLOC_CTX *out_mem_ctx,
+				  const DATA_BLOB in, DATA_BLOB *out) ;
+NTSTATUS gensec_ntlmssp_client_start(struct gensec_security *gensec_security);
+NTSTATUS gensec_ntlmssp_resume_ccache_start(struct gensec_security *gensec_security);
+
+/* The following definitions come from auth/ntlmssp/gensec_ntlmssp_server.c  */
+
+
+/**
+ * Next state function for the Negotiate packet (GENSEC wrapper)
+ *
+ * @param gensec_security GENSEC state
+ * @param out_mem_ctx Memory context for *out
+ * @param in The request, as a DATA_BLOB.  reply.data must be NULL
+ * @param out The reply, as an allocated DATA_BLOB, caller to free.
+ * @return Errors or MORE_PROCESSING_REQUIRED if (normal) a reply is required.
+ */
+NTSTATUS gensec_ntlmssp_server_negotiate(struct gensec_security *gensec_security,
+					 TALLOC_CTX *out_mem_ctx,
+					 const DATA_BLOB request, DATA_BLOB *reply);
+
+struct tevent_req *ntlmssp_server_auth_send(TALLOC_CTX *mem_ctx,
+					    struct tevent_context *ev,
+					    struct gensec_security *gensec_security,
+					    const DATA_BLOB in);
+NTSTATUS ntlmssp_server_auth_recv(struct tevent_req *req,
+				  TALLOC_CTX *out_mem_ctx,
+				  DATA_BLOB *out);
+
+
+/**
+ * Start NTLMSSP on the server side
+ *
+ */
+NTSTATUS gensec_ntlmssp_server_start(struct gensec_security *gensec_security);
+
+/**
+ * Return the credentials of a logged on user, including session keys
+ * etc.
+ *
+ * Only valid after a successful authentication
+ *
+ * May only be called once per authentication.
+ *
+ */
+NTSTATUS gensec_ntlmssp_session_info(struct gensec_security *gensec_security,
+				     TALLOC_CTX *mem_ctx,
+				     struct auth_session_info **session_info) ;
+
+/* The following definitions come from auth/ntlmssp/gensec_ntlmssp.c  */
+
+NTSTATUS gensec_ntlmssp_sign_packet(struct gensec_security *gensec_security,
+				    TALLOC_CTX *sig_mem_ctx,
+				    const uint8_t *data, size_t length,
+				    const uint8_t *whole_pdu, size_t pdu_length,
+				    DATA_BLOB *sig);
+NTSTATUS gensec_ntlmssp_check_packet(struct gensec_security *gensec_security,
+				     const uint8_t *data, size_t length,
+				     const uint8_t *whole_pdu, size_t pdu_length,
+				     const DATA_BLOB *sig);
+NTSTATUS gensec_ntlmssp_seal_packet(struct gensec_security *gensec_security,
+				    TALLOC_CTX *sig_mem_ctx,
+				    uint8_t *data, size_t length,
+				    const uint8_t *whole_pdu, size_t pdu_length,
+				    DATA_BLOB *sig);
+NTSTATUS gensec_ntlmssp_unseal_packet(struct gensec_security *gensec_security,
+				      uint8_t *data, size_t length,
+				      const uint8_t *whole_pdu, size_t pdu_length,
+				      const DATA_BLOB *sig);
+size_t gensec_ntlmssp_sig_size(struct gensec_security *gensec_security, size_t data_size) ;
+NTSTATUS gensec_ntlmssp_wrap(struct gensec_security *gensec_security,
+			     TALLOC_CTX *out_mem_ctx,
+			     const DATA_BLOB *in,
+			     DATA_BLOB *out);
+NTSTATUS gensec_ntlmssp_unwrap(struct gensec_security *gensec_security,
+			       TALLOC_CTX *out_mem_ctx,
+			       const DATA_BLOB *in,
+			       DATA_BLOB *out);
+
+/**
+ * Return the NTLMSSP master session key
+ *
+ * @param ntlmssp_state NTLMSSP State
+ */
+NTSTATUS gensec_ntlmssp_magic(struct gensec_security *gensec_security,
+			      const DATA_BLOB *first_packet);
+bool gensec_ntlmssp_have_feature(struct gensec_security *gensec_security,
+				 uint32_t feature);
+NTSTATUS gensec_ntlmssp_session_key(struct gensec_security *gensec_security,
+				    TALLOC_CTX *mem_ctx,
+				    DATA_BLOB *session_key);
+NTSTATUS gensec_ntlmssp_start(struct gensec_security *gensec_security);
+
diff --git a/auth/ntlmssp/ntlmssp_server.c b/auth/ntlmssp/ntlmssp_server.c
new file mode 100644
index 0000000..6a27db1
--- /dev/null
+++ b/auth/ntlmssp/ntlmssp_server.c
@@ -0,0 +1,1160 @@
+/*
+   Unix SMB/Netbios implementation.
+   Version 3.0
+   handle NTLMSSP, server side
+
+   Copyright (C) Andrew Tridgell      2001
+   Copyright (C) Andrew Bartlett 2001-2010
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include <tevent.h>
+#include "lib/util/tevent_ntstatus.h"
+#include "lib/util/time_basic.h"
+#include "auth/ntlmssp/ntlmssp.h"
+#include "auth/ntlmssp/ntlmssp_private.h"
+#include "../librpc/gen_ndr/ndr_ntlmssp.h"
+#include "auth/ntlmssp/ntlmssp_ndr.h"
+#include "../libcli/auth/libcli_auth.h"
+#include "auth/gensec/gensec.h"
+#include "auth/gensec/gensec_internal.h"
+#include "auth/common_auth.h"
+#include "param/param.h"
+#include "param/loadparm.h"
+#include "libcli/security/session.h"
+
+#include "lib/crypto/gnutls_helpers.h"
+#include <gnutls/gnutls.h>
+#include <gnutls/crypto.h>
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
+
+/**
+ * Determine correct target name flags for reply, given server role
+ * and negotiated flags
+ *
+ * @param ntlmssp_state NTLMSSP State
+ * @param neg_flags The flags from the packet
+ * @param chal_flags The flags to be set in the reply packet
+ * @return The 'target name' string.
+ */
+
+const char *ntlmssp_target_name(struct ntlmssp_state *ntlmssp_state,
+				uint32_t neg_flags, uint32_t *chal_flags)
+{
+	if (neg_flags & NTLMSSP_REQUEST_TARGET) {
+		*chal_flags |= NTLMSSP_NEGOTIATE_TARGET_INFO;
+		*chal_flags |= NTLMSSP_REQUEST_TARGET;
+		if (ntlmssp_state->server.is_standalone) {
+			*chal_flags |= NTLMSSP_TARGET_TYPE_SERVER;
+			return ntlmssp_state->server.netbios_name;
+		} else {
+			*chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN;
+			return ntlmssp_state->server.netbios_domain;
+		};
+	} else {
+		return "";
+	}
+}
+
+/**
+ * Next state function for the NTLMSSP Negotiate packet
+ *
+ * @param gensec_security GENSEC state
+ * @param out_mem_ctx Memory context for *out
+ * @param in The request, as a DATA_BLOB.  reply.data must be NULL
+ * @param out The reply, as an allocated DATA_BLOB, caller to free.
+ * @return Errors or MORE_PROCESSING_REQUIRED if (normal) a reply is required.
+ */
+
+NTSTATUS gensec_ntlmssp_server_negotiate(struct gensec_security *gensec_security,
+					 TALLOC_CTX *out_mem_ctx,
+					 const DATA_BLOB request, DATA_BLOB *reply)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+	struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
+	struct auth4_context *auth_context = gensec_security->auth_context;
+	DATA_BLOB struct_blob;
+	uint32_t neg_flags = 0;
+	uint32_t ntlmssp_command, chal_flags;
+	uint8_t cryptkey[8];
+	const char *target_name;
+	NTSTATUS status;
+	struct timeval tv_now = timeval_current();
+	/*
+	 * See [MS-NLMP]
+	 *
+	 * Windows NT 4.0, windows_2000: use 30 minutes,
+	 * Windows XP, Windows Server 2003, Windows Vista,
+	 * Windows Server 2008, Windows 7, and Windows Server 2008 R2
+	 * use 36 hours.
+	 *
+	 * Newer systems doesn't check this, likely because the
+	 * connectionless NTLMSSP is no longer supported.
+	 *
+	 * As we expect the AUTHENTICATION_MESSAGE to arrive
+	 * directly after the NEGOTIATE_MESSAGE (typically less than
+	 * as 1 second later). We use a hard timeout of 30 Minutes.
+	 *
+	 * We don't look at AUTHENTICATE_MESSAGE.NtChallengeResponse.TimeStamp
+	 * instead we just remember our own time.
+	 */
+	uint32_t max_lifetime = 30 * 60;
+	struct timeval tv_end = timeval_add(&tv_now, max_lifetime, 0);
+
+	/* parse the NTLMSSP packet */
+#if 0
+	file_save("ntlmssp_negotiate.dat", request.data, request.length);
+#endif
+
+	if (request.length) {
+		if (request.length > UINT16_MAX) {
+			DEBUG(1, ("ntlmssp_server_negotiate: reject large request of length %u\n",
+				(unsigned int)request.length));
+			return NT_STATUS_INVALID_PARAMETER;
+		}
+
+		if ((request.length < 16) || !msrpc_parse(ntlmssp_state, &request, "Cdd",
+							  "NTLMSSP",
+							  &ntlmssp_command,
+							  &neg_flags)) {
+			DEBUG(1, ("ntlmssp_server_negotiate: failed to parse NTLMSSP Negotiate of length %u\n",
+				(unsigned int)request.length));
+			dump_data(2, request.data, request.length);
+			return NT_STATUS_INVALID_PARAMETER;
+		}
+		debug_ntlmssp_flags(neg_flags);
+
+		if (DEBUGLEVEL >= 10) {
+			struct NEGOTIATE_MESSAGE *negotiate = talloc(
+				ntlmssp_state, struct NEGOTIATE_MESSAGE);
+			if (negotiate != NULL) {
+				status = ntlmssp_pull_NEGOTIATE_MESSAGE(
+					&request, negotiate, negotiate);
+				if (NT_STATUS_IS_OK(status)) {
+					NDR_PRINT_DEBUG(NEGOTIATE_MESSAGE,
+							negotiate);
+				}
+				TALLOC_FREE(negotiate);
+			}
+		}
+	}
+
+	status = ntlmssp_handle_neg_flags(ntlmssp_state, neg_flags, "negotiate");
+	if (!NT_STATUS_IS_OK(status)){
+		return status;
+	}
+
+	/* Ask our caller what challenge they would like in the packet */
+	if (auth_context->get_ntlm_challenge) {
+		status = auth_context->get_ntlm_challenge(auth_context, cryptkey);
+		if (!NT_STATUS_IS_OK(status)) {
+			DEBUG(1, ("gensec_ntlmssp_server_negotiate: failed to get challenge: %s\n",
+				  nt_errstr(status)));
+			return status;
+		}
+	} else {
+		DEBUG(1, ("gensec_ntlmssp_server_negotiate: backend doesn't give a challenge\n"));
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	/* The flags we send back are not just the negotiated flags,
+	 * they are also 'what is in this packet'.  Therfore, we
+	 * operate on 'chal_flags' from here on
+	 */
+
+	chal_flags = ntlmssp_state->neg_flags;
+	ntlmssp_state->server.challenge_endtime = timeval_to_nttime(&tv_end);
+
+	/* get the right name to fill in as 'target' */
+	target_name = ntlmssp_target_name(ntlmssp_state,
+					  neg_flags, &chal_flags);
+	if (target_name == NULL)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	ntlmssp_state->chal = data_blob_talloc(ntlmssp_state, cryptkey, 8);
+	ntlmssp_state->internal_chal = data_blob_talloc(ntlmssp_state,
+							cryptkey, 8);
+
+	/* This creates the 'blob' of names that appears at the end of the packet */
+	if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO) {
+		enum ndr_err_code err;
+		struct AV_PAIR *pairs = NULL;
+		uint32_t count = 5;
+
+		pairs = talloc_zero_array(ntlmssp_state, struct AV_PAIR, count + 1);
+		if (pairs == NULL) {
+			return NT_STATUS_NO_MEMORY;
+		}
+
+		pairs[0].AvId			= MsvAvNbDomainName;
+		pairs[0].Value.AvNbDomainName	= target_name;
+
+		pairs[1].AvId			= MsvAvNbComputerName;
+		pairs[1].Value.AvNbComputerName	= ntlmssp_state->server.netbios_name;
+
+		pairs[2].AvId			= MsvAvDnsDomainName;
+		pairs[2].Value.AvDnsDomainName	= ntlmssp_state->server.dns_domain;
+
+		pairs[3].AvId			= MsvAvDnsComputerName;
+		pairs[3].Value.AvDnsComputerName= ntlmssp_state->server.dns_name;
+
+		if (!ntlmssp_state->force_old_spnego) {
+			pairs[4].AvId			= MsvAvTimestamp;
+			pairs[4].Value.AvTimestamp	=
+						timeval_to_nttime(&tv_now);
+			count += 1;
+
+			pairs[5].AvId			= MsvAvEOL;
+		} else {
+			pairs[4].AvId			= MsvAvEOL;
+		}
+
+		ntlmssp_state->server.av_pair_list.count = count;
+		ntlmssp_state->server.av_pair_list.pair = pairs;
+
+		err = ndr_push_struct_blob(&struct_blob,
+					ntlmssp_state,
+					&ntlmssp_state->server.av_pair_list,
+					(ndr_push_flags_fn_t)ndr_push_AV_PAIR_LIST);
+		if (!NDR_ERR_CODE_IS_SUCCESS(err)) {
+			return NT_STATUS_NO_MEMORY;
+		}
+	} else {
+		struct_blob = data_blob_null;
+	}
+
+	{
+		/* Marshal the packet in the right format, be it unicode or ASCII */
+		const char *gen_string;
+		const DATA_BLOB version_blob = ntlmssp_version_blob();
+
+		if (ntlmssp_state->unicode) {
+			gen_string = "CdUdbddBb";
+		} else {
+			gen_string = "CdAdbddBb";
+		}
+
+		status = msrpc_gen(out_mem_ctx, reply, gen_string,
+			"NTLMSSP",
+			NTLMSSP_CHALLENGE,
+			target_name,
+			chal_flags,
+			cryptkey, 8,
+			0, 0,
+			struct_blob.data, struct_blob.length,
+			version_blob.data, version_blob.length);
+
+		if (!NT_STATUS_IS_OK(status)) {
+			data_blob_free(&struct_blob);
+			return status;
+		}
+
+		if (DEBUGLEVEL >= 10) {
+			struct CHALLENGE_MESSAGE *challenge = talloc(
+				ntlmssp_state, struct CHALLENGE_MESSAGE);
+			if (challenge != NULL) {
+				challenge->NegotiateFlags = chal_flags;
+				status = ntlmssp_pull_CHALLENGE_MESSAGE(
+					reply, challenge, challenge);
+				if (NT_STATUS_IS_OK(status)) {
+					NDR_PRINT_DEBUG(CHALLENGE_MESSAGE,
+							challenge);
+				}
+				TALLOC_FREE(challenge);
+			}
+		}
+	}
+
+	data_blob_free(&struct_blob);
+
+	ntlmssp_state->negotiate_blob = data_blob_dup_talloc(ntlmssp_state,
+							     request);
+	if (ntlmssp_state->negotiate_blob.length != request.length) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	ntlmssp_state->challenge_blob = data_blob_dup_talloc(ntlmssp_state,
+							     *reply);
+	if (ntlmssp_state->challenge_blob.length != reply->length) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	ntlmssp_state->expected_state = NTLMSSP_AUTH;
+
+	return NT_STATUS_MORE_PROCESSING_REQUIRED;
+}
+
+struct ntlmssp_server_auth_state {
+	struct gensec_security *gensec_security;
+	struct gensec_ntlmssp_context *gensec_ntlmssp;
+	DATA_BLOB in;
+	struct auth_usersupplied_info *user_info;
+	DATA_BLOB user_session_key;
+	DATA_BLOB lm_session_key;
+	/* internal variables used by KEY_EXCH (client-supplied user session key */
+	DATA_BLOB encrypted_session_key;
+	bool doing_ntlm2;
+	/* internal variables used by NTLM2 */
+	uint8_t session_nonce[16];
+};
+
+static NTSTATUS ntlmssp_server_preauth(struct gensec_security *gensec_security,
+				       struct gensec_ntlmssp_context *gensec_ntlmssp,
+				       struct ntlmssp_server_auth_state *state,
+				       const DATA_BLOB request);
+static void ntlmssp_server_auth_done(struct tevent_req *subreq);
+static NTSTATUS ntlmssp_server_postauth(struct gensec_security *gensec_security,
+					struct gensec_ntlmssp_context *gensec_ntlmssp,
+					struct ntlmssp_server_auth_state *state,
+					DATA_BLOB request);
+
+struct tevent_req *ntlmssp_server_auth_send(TALLOC_CTX *mem_ctx,
+					    struct tevent_context *ev,
+					    struct gensec_security *gensec_security,
+					    const DATA_BLOB in)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+	struct auth4_context *auth_context = gensec_security->auth_context;
+	struct tevent_req *req = NULL;
+	struct tevent_req *subreq = NULL;
+	struct ntlmssp_server_auth_state *state = NULL;
+	NTSTATUS status;
+
+	req = tevent_req_create(mem_ctx, &state,
+				struct ntlmssp_server_auth_state);
+	if (req == NULL) {
+		return NULL;
+	}
+	state->gensec_security = gensec_security;
+	state->gensec_ntlmssp = gensec_ntlmssp;
+	state->in = in;
+
+	status = ntlmssp_server_preauth(gensec_security,
+					gensec_ntlmssp,
+					state, in);
+	if (tevent_req_nterror(req, status)) {
+		return tevent_req_post(req, ev);
+	}
+
+	subreq = auth_context->check_ntlm_password_send(
+		state, ev, auth_context, state->user_info);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq,	ntlmssp_server_auth_done, req);
+	return req;
+}
+
+/**
+ * Next state function for the Authenticate packet
+ *
+ * @param ntlmssp_state NTLMSSP State
+ * @param request The request, as a DATA_BLOB
+ * @return Errors or NT_STATUS_OK.
+ */
+
+static NTSTATUS ntlmssp_server_preauth(struct gensec_security *gensec_security,
+				       struct gensec_ntlmssp_context *gensec_ntlmssp,
+				       struct ntlmssp_server_auth_state *state,
+				       const DATA_BLOB request)
+{
+	struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
+	struct auth4_context *auth_context = gensec_security->auth_context;
+	struct auth_usersupplied_info *user_info = NULL;
+	uint32_t ntlmssp_command, auth_flags;
+	NTSTATUS nt_status;
+	const unsigned int version_len = 8;
+	DATA_BLOB version_blob = data_blob_null;
+	const unsigned int mic_len = NTLMSSP_MIC_SIZE;
+	DATA_BLOB mic_blob = data_blob_null;
+	const char *parse_string;
+	bool ok;
+	struct timeval endtime;
+	bool expired = false;
+
+#if 0
+	file_save("ntlmssp_auth.dat", request.data, request.length);
+#endif
+
+	if (ntlmssp_state->unicode) {
+		parse_string = "CdBBUUUBdbb";
+	} else {
+		parse_string = "CdBBAAABdbb";
+	}
+
+	/* zero these out */
+	data_blob_free(&ntlmssp_state->session_key);
+	data_blob_free(&ntlmssp_state->lm_resp);
+	data_blob_free(&ntlmssp_state->nt_resp);
+
+	ntlmssp_state->user = NULL;
+	ntlmssp_state->domain = NULL;
+	ntlmssp_state->client.netbios_name = NULL;
+
+	/* now the NTLMSSP encoded auth hashes */
+	ok = msrpc_parse(ntlmssp_state, &request, parse_string,
+			 "NTLMSSP",
+			 &ntlmssp_command,
+			 &ntlmssp_state->lm_resp,
+			 &ntlmssp_state->nt_resp,
+			 &ntlmssp_state->domain,
+			 &ntlmssp_state->user,
+			 &ntlmssp_state->client.netbios_name,
+			 &state->encrypted_session_key,
+			 &auth_flags,
+			 &version_blob, version_len,
+			 &mic_blob, mic_len);
+	if (!ok) {
+		DEBUG(10, ("ntlmssp_server_auth: failed to parse NTLMSSP (nonfatal):\n"));
+		dump_data(10, request.data, request.length);
+
+		data_blob_free(&version_blob);
+		data_blob_free(&mic_blob);
+
+		if (ntlmssp_state->unicode) {
+			parse_string = "CdBBUUUBd";
+		} else {
+			parse_string = "CdBBAAABd";
+		}
+
+		ok = msrpc_parse(ntlmssp_state, &request, parse_string,
+				 "NTLMSSP",
+				 &ntlmssp_command,
+				 &ntlmssp_state->lm_resp,
+				 &ntlmssp_state->nt_resp,
+				 &ntlmssp_state->domain,
+				 &ntlmssp_state->user,
+				 &ntlmssp_state->client.netbios_name,
+				 &state->encrypted_session_key,
+				 &auth_flags);
+	}
+
+	if (!ok) {
+		DEBUG(10, ("ntlmssp_server_auth: failed to parse NTLMSSP (nonfatal):\n"));
+		dump_data(10, request.data, request.length);
+
+		/* zero this out */
+		data_blob_free(&state->encrypted_session_key);
+		auth_flags = 0;
+
+		/* Try again with a shorter string (Win9X truncates this packet) */
+		if (ntlmssp_state->unicode) {
+			parse_string = "CdBBUUU";
+		} else {
+			parse_string = "CdBBAAA";
+		}
+
+		/* now the NTLMSSP encoded auth hashes */
+		if (!msrpc_parse(ntlmssp_state, &request, parse_string,
+				 "NTLMSSP",
+				 &ntlmssp_command,
+				 &ntlmssp_state->lm_resp,
+				 &ntlmssp_state->nt_resp,
+				 &ntlmssp_state->domain,
+				 &ntlmssp_state->user,
+				 &ntlmssp_state->client.netbios_name)) {
+			DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP (tried both formats):\n"));
+			dump_data(2, request.data, request.length);
+
+			return NT_STATUS_INVALID_PARAMETER;
+		}
+	}
+
+	talloc_steal(state, state->encrypted_session_key.data);
+
+	if (auth_flags != 0) {
+		nt_status = ntlmssp_handle_neg_flags(ntlmssp_state,
+						     auth_flags,
+						     "authenticate");
+		if (!NT_STATUS_IS_OK(nt_status)){
+			return nt_status;
+		}
+	}
+
+	if (DEBUGLEVEL >= 10) {
+		struct AUTHENTICATE_MESSAGE *authenticate = talloc(
+			ntlmssp_state, struct AUTHENTICATE_MESSAGE);
+		if (authenticate != NULL) {
+			NTSTATUS status;
+			authenticate->NegotiateFlags = auth_flags;
+			status = ntlmssp_pull_AUTHENTICATE_MESSAGE(
+				&request, authenticate, authenticate);
+			if (NT_STATUS_IS_OK(status)) {
+				NDR_PRINT_DEBUG(AUTHENTICATE_MESSAGE,
+						authenticate);
+			}
+			TALLOC_FREE(authenticate);
+		}
+	}
+
+	DEBUG(3,("Got user=[%s] domain=[%s] workstation=[%s] len1=%lu len2=%lu\n",
+		 ntlmssp_state->user, ntlmssp_state->domain,
+		 ntlmssp_state->client.netbios_name,
+		 (unsigned long)ntlmssp_state->lm_resp.length,
+		 (unsigned long)ntlmssp_state->nt_resp.length));
+
+#if 0
+	file_save("nthash1.dat",  &ntlmssp_state->nt_resp.data,  &ntlmssp_state->nt_resp.length);
+	file_save("lmhash1.dat",  &ntlmssp_state->lm_resp.data,  &ntlmssp_state->lm_resp.length);
+#endif
+
+	if (ntlmssp_state->nt_resp.length > 24) {
+		struct NTLMv2_RESPONSE v2_resp;
+		enum ndr_err_code err;
+		uint32_t i = 0;
+		uint32_t count = 0;
+		const struct AV_PAIR *flags = NULL;
+		const struct AV_PAIR *eol = NULL;
+		uint32_t av_flags = 0;
+
+		err = ndr_pull_struct_blob(&ntlmssp_state->nt_resp,
+					ntlmssp_state,
+					&v2_resp,
+					(ndr_pull_flags_fn_t)ndr_pull_NTLMv2_RESPONSE);
+		if (!NDR_ERR_CODE_IS_SUCCESS(err)) {
+			nt_status = ndr_map_error2ntstatus(err);
+			if (NT_STATUS_EQUAL(nt_status, NT_STATUS_BUFFER_TOO_SMALL)) {
+				/*
+				 * Note that invalid blobs should result in
+				 * INVALID_PARAMETER, as demonstrated by
+				 * smb2.session.ntlmssp_bug14932
+				 */
+				nt_status = NT_STATUS_INVALID_PARAMETER;
+			}
+			DEBUG(1,("%s: failed to parse NTLMv2_RESPONSE of length %zu for "
+				 "user=[%s] domain=[%s] workstation=[%s] - %s %s\n",
+				 __func__, ntlmssp_state->nt_resp.length,
+				 ntlmssp_state->user, ntlmssp_state->domain,
+				 ntlmssp_state->client.netbios_name,
+				 ndr_errstr(err), nt_errstr(nt_status)));
+			return nt_status;
+		}
+
+		if (DEBUGLVL(10)) {
+			NDR_PRINT_DEBUG(NTLMv2_RESPONSE, &v2_resp);
+		}
+
+		eol = ndr_ntlmssp_find_av(&v2_resp.Challenge.AvPairs,
+					  MsvAvEOL);
+		if (eol == NULL) {
+			DEBUG(1,("%s: missing MsvAvEOL for "
+				 "user=[%s] domain=[%s] workstation=[%s]\n",
+				 __func__, ntlmssp_state->user, ntlmssp_state->domain,
+				 ntlmssp_state->client.netbios_name));
+			return NT_STATUS_INVALID_PARAMETER;
+		}
+
+		flags = ndr_ntlmssp_find_av(&v2_resp.Challenge.AvPairs,
+					    MsvAvFlags);
+		if (flags != NULL) {
+			av_flags = flags->Value.AvFlags;
+		}
+
+		if (av_flags & NTLMSSP_AVFLAG_MIC_IN_AUTHENTICATE_MESSAGE) {
+			if (mic_blob.length != NTLMSSP_MIC_SIZE) {
+				DEBUG(1,("%s: mic_blob.length[%u] for "
+					 "user=[%s] domain=[%s] workstation=[%s]\n",
+					 __func__,
+					 (unsigned)mic_blob.length,
+					 ntlmssp_state->user,
+					 ntlmssp_state->domain,
+					 ntlmssp_state->client.netbios_name));
+				return NT_STATUS_INVALID_PARAMETER;
+			}
+
+			if (request.length <
+			    (NTLMSSP_MIC_OFFSET + NTLMSSP_MIC_SIZE))
+			{
+				DEBUG(1,("%s: missing MIC "
+					 "request.length[%u] for "
+					 "user=[%s] domain=[%s] workstation=[%s]\n",
+					 __func__,
+					 (unsigned)request.length,
+					 ntlmssp_state->user,
+					 ntlmssp_state->domain,
+					 ntlmssp_state->client.netbios_name));
+				return NT_STATUS_INVALID_PARAMETER;
+			}
+
+			ntlmssp_state->new_spnego = true;
+		}
+
+		count = ntlmssp_state->server.av_pair_list.count;
+		if (v2_resp.Challenge.AvPairs.count < count) {
+			return NT_STATUS_INVALID_PARAMETER;
+		}
+
+		for (i = 0; i < count; i++) {
+			const struct AV_PAIR *sp =
+				&ntlmssp_state->server.av_pair_list.pair[i];
+			const struct AV_PAIR *cp = NULL;
+
+			if (sp->AvId == MsvAvEOL) {
+				continue;
+			}
+
+			cp = ndr_ntlmssp_find_av(&v2_resp.Challenge.AvPairs,
+						 sp->AvId);
+			if (cp == NULL) {
+				DEBUG(1,("%s: AvId 0x%x missing for"
+					 "user=[%s] domain=[%s] "
+					 "workstation=[%s]\n",
+					 __func__,
+					 (unsigned)sp->AvId,
+					 ntlmssp_state->user,
+					 ntlmssp_state->domain,
+					 ntlmssp_state->client.netbios_name));
+				return NT_STATUS_INVALID_PARAMETER;
+			}
+
+			switch (cp->AvId) {
+#define CASE_STRING(v) case Msv ## v: do { \
+	int cmp; \
+	if (sp->Value.v == NULL) { \
+		return NT_STATUS_INTERNAL_ERROR; \
+	} \
+	if (cp->Value.v == NULL) { \
+		DEBUG(1,("%s: invalid %s " \
+			 "got[%s] expect[%s] for " \
+			 "user=[%s] domain=[%s] workstation=[%s]\n", \
+			 __func__, #v, \
+			 cp->Value.v, \
+			 sp->Value.v, \
+			 ntlmssp_state->user, \
+			 ntlmssp_state->domain, \
+			 ntlmssp_state->client.netbios_name)); \
+		return NT_STATUS_INVALID_PARAMETER; \
+	} \
+	cmp = strcmp(cp->Value.v, sp->Value.v); \
+	if (cmp != 0) { \
+		DEBUG(1,("%s: invalid %s " \
+			 "got[%s] expect[%s] for " \
+			 "user=[%s] domain=[%s] workstation=[%s]\n", \
+			 __func__, #v, \
+			 cp->Value.v, \
+			 sp->Value.v, \
+			 ntlmssp_state->user, \
+			 ntlmssp_state->domain, \
+			 ntlmssp_state->client.netbios_name)); \
+		return NT_STATUS_INVALID_PARAMETER; \
+	} \
+} while(0); break
+			CASE_STRING(AvNbComputerName);
+			CASE_STRING(AvNbDomainName);
+			CASE_STRING(AvDnsComputerName);
+			CASE_STRING(AvDnsDomainName);
+			CASE_STRING(AvDnsTreeName);
+			case MsvAvTimestamp:
+				if (cp->Value.AvTimestamp != sp->Value.AvTimestamp) {
+					struct timeval ct;
+					struct timeval st;
+					struct timeval_buf tmp1;
+					struct timeval_buf tmp2;
+
+					nttime_to_timeval(&ct,
+							  cp->Value.AvTimestamp);
+					nttime_to_timeval(&st,
+							  sp->Value.AvTimestamp);
+
+					DEBUG(1,("%s: invalid AvTimestamp "
+						 "got[%s] expect[%s] for "
+						 "user=[%s] domain=[%s] "
+						 "workstation=[%s]\n",
+						 __func__,
+						 timeval_str_buf(&ct, false,
+								 true, &tmp1),
+						 timeval_str_buf(&st, false,
+								 true, &tmp2),
+						 ntlmssp_state->user,
+						 ntlmssp_state->domain,
+						 ntlmssp_state->client.netbios_name));
+					return NT_STATUS_INVALID_PARAMETER;
+				}
+				break;
+			default:
+				/*
+				 * This can't happen as we control
+				 * ntlmssp_state->server.av_pair_list
+				 */
+				return NT_STATUS_INTERNAL_ERROR;
+			}
+		}
+	}
+
+	nttime_to_timeval(&endtime, ntlmssp_state->server.challenge_endtime);
+	expired = timeval_expired(&endtime);
+	if (expired) {
+		struct timeval_buf tmp;
+		DEBUG(1,("%s: challenge invalid (expired %s) for "
+			 "user=[%s] domain=[%s] workstation=[%s]\n",
+			 __func__,
+			 timeval_str_buf(&endtime, false, true, &tmp),
+			 ntlmssp_state->user, ntlmssp_state->domain,
+			 ntlmssp_state->client.netbios_name));
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	/* NTLM2 uses a 'challenge' that is made of up both the server challenge, and a
+	   client challenge
+
+	   However, the NTLM2 flag may still be set for the real NTLMv2 logins, be careful.
+	*/
+	if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
+		if (ntlmssp_state->nt_resp.length == 24 && ntlmssp_state->lm_resp.length == 24) {
+			state->doing_ntlm2 = true;
+
+			memcpy(state->session_nonce, ntlmssp_state->internal_chal.data, 8);
+			memcpy(&state->session_nonce[8], ntlmssp_state->lm_resp.data, 8);
+
+			SMB_ASSERT(ntlmssp_state->internal_chal.data && ntlmssp_state->internal_chal.length == 8);
+
+			/* LM response is no longer useful */
+			data_blob_free(&ntlmssp_state->lm_resp);
+
+			/* We changed the effective challenge - set it */
+			if (auth_context->set_ntlm_challenge) {
+				uint8_t session_nonce_hash[16];
+				int rc;
+
+				rc = gnutls_hash_fast(GNUTLS_DIG_MD5,
+						      state->session_nonce,
+						      16,
+						      session_nonce_hash);
+				if (rc < 0) {
+					return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+				}
+
+
+				nt_status = auth_context->set_ntlm_challenge(auth_context,
+									     session_nonce_hash,
+									     "NTLMSSP callback (NTLM2)");
+				ZERO_ARRAY(session_nonce_hash);
+				if (!NT_STATUS_IS_OK(nt_status)) {
+					DEBUG(1, ("gensec_ntlmssp_server_negotiate: failed to get challenge: %s\n",
+						  nt_errstr(nt_status)));
+					return nt_status;
+				}
+			} else {
+				DEBUG(1, ("gensec_ntlmssp_server_negotiate: backend doesn't have facility for challenge to be set\n"));
+
+				return NT_STATUS_NOT_IMPLEMENTED;
+			}
+
+			/* LM Key is incompatible. */
+			ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+		}
+	}
+
+	user_info = talloc_zero(state, struct auth_usersupplied_info);
+	if (!user_info) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	user_info->logon_parameters = MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT | MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT;
+	user_info->flags = 0;
+	user_info->client.account_name = ntlmssp_state->user;
+	user_info->client.domain_name = ntlmssp_state->domain;
+	user_info->workstation_name = ntlmssp_state->client.netbios_name;
+	user_info->remote_host = gensec_get_remote_address(gensec_security);
+	user_info->local_host = gensec_get_local_address(gensec_security);
+	user_info->service_description
+		= gensec_get_target_service_description(gensec_security);
+
+	/*
+	 * This will just be the string "NTLMSSP" from
+	 * gensec_ntlmssp_final_auth_type, but ensures it stays in sync
+	 * with the same use in the authorization logging triggered by
+	 * gensec_session_info() later
+	 */
+	user_info->auth_description = gensec_final_auth_type(gensec_security);
+
+	user_info->password_state = AUTH_PASSWORD_RESPONSE;
+	user_info->password.response.lanman = ntlmssp_state->lm_resp;
+	user_info->password.response.nt = ntlmssp_state->nt_resp;
+
+	state->user_info = user_info;
+	return NT_STATUS_OK;
+}
+
+static void ntlmssp_server_auth_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req =
+		tevent_req_callback_data(subreq,
+		struct tevent_req);
+	struct ntlmssp_server_auth_state *state =
+		tevent_req_data(req,
+		struct ntlmssp_server_auth_state);
+	struct gensec_security *gensec_security = state->gensec_security;
+	struct gensec_ntlmssp_context *gensec_ntlmssp = state->gensec_ntlmssp;
+	struct auth4_context *auth_context = gensec_security->auth_context;
+	uint8_t authoritative = 1;
+	NTSTATUS status;
+
+	status = auth_context->check_ntlm_password_recv(subreq,
+						gensec_ntlmssp,
+						&authoritative,
+						&gensec_ntlmssp->server_returned_info,
+						&state->user_session_key,
+						&state->lm_session_key);
+	TALLOC_FREE(subreq);
+	if (!NT_STATUS_IS_OK(status)) {
+		DBG_INFO("Checking NTLMSSP password for %s\\%s failed: %s\n",
+			 state->user_info->client.domain_name,
+			 state->user_info->client.account_name,
+			 nt_errstr(status));
+	}
+	if (tevent_req_nterror(req, status)) {
+		return;
+	}
+	talloc_steal(state, state->user_session_key.data);
+	talloc_steal(state, state->lm_session_key.data);
+
+	status = ntlmssp_server_postauth(state->gensec_security,
+					 state->gensec_ntlmssp,
+					 state, state->in);
+	if (tevent_req_nterror(req, status)) {
+		return;
+	}
+
+	tevent_req_done(req);
+}
+
+/**
+ * Next state function for the Authenticate packet
+ * (after authentication - figures out the session keys etc)
+ *
+ * @param ntlmssp_state NTLMSSP State
+ * @return Errors or NT_STATUS_OK.
+ */
+
+static NTSTATUS ntlmssp_server_postauth(struct gensec_security *gensec_security,
+					struct gensec_ntlmssp_context *gensec_ntlmssp,
+					struct ntlmssp_server_auth_state *state,
+					DATA_BLOB request)
+{
+	struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
+	struct auth4_context *auth_context = gensec_security->auth_context;
+	DATA_BLOB user_session_key = state->user_session_key;
+	DATA_BLOB lm_session_key = state->lm_session_key;
+	NTSTATUS nt_status = NT_STATUS_OK;
+	DATA_BLOB session_key = data_blob(NULL, 0);
+	struct auth_session_info *session_info = NULL;
+
+	TALLOC_FREE(state->user_info);
+
+	if (lpcfg_map_to_guest(gensec_security->settings->lp_ctx) != NEVER_MAP_TO_GUEST
+	    && auth_context->generate_session_info != NULL)
+	{
+		NTSTATUS tmp_status;
+
+		/*
+		 * We need to check if the auth is anonymous or mapped to guest
+		 */
+		tmp_status = auth_context->generate_session_info(auth_context, state,
+								 gensec_ntlmssp->server_returned_info,
+								 gensec_ntlmssp->ntlmssp_state->user,
+								 AUTH_SESSION_INFO_SIMPLE_PRIVILEGES,
+								 &session_info);
+		if (!NT_STATUS_IS_OK(tmp_status)) {
+			/*
+			 * We don't care about failures,
+			 * the worst result is that we try MIC checking
+			 * for a map to guest authentication.
+			 */
+			TALLOC_FREE(session_info);
+		}
+	}
+
+	if (session_info != NULL) {
+		if (security_session_user_level(session_info, NULL) < SECURITY_USER) {
+			/*
+			 * Anonymous and GUEST are not secure anyway.
+			 * avoid new_spnego and MIC checking.
+			 */
+			ntlmssp_state->new_spnego = false;
+			ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_SIGN;
+			ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_SEAL;
+		}
+		TALLOC_FREE(session_info);
+	}
+
+	dump_data_pw("NT session key:\n", user_session_key.data, user_session_key.length);
+	dump_data_pw("LM first-8:\n", lm_session_key.data, lm_session_key.length);
+
+	/* Handle the different session key derivation for NTLM2 */
+	if (state->doing_ntlm2) {
+		if (user_session_key.data && user_session_key.length == 16) {
+			int rc;
+
+			session_key = data_blob_talloc(ntlmssp_state,
+						       NULL, 16);
+
+			rc = gnutls_hmac_fast(GNUTLS_MAC_MD5,
+					      user_session_key.data,
+					      user_session_key.length,
+					      state->session_nonce,
+					      sizeof(state->session_nonce),
+					      session_key.data);
+			if (rc < 0) {
+				return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+			}
+
+			DEBUG(10,("ntlmssp_server_auth: Created NTLM2 session key.\n"));
+			dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
+
+		} else {
+			DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM2 session key.\n"));
+			session_key = data_blob_null;
+		}
+	} else if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
+		/* Ensure we can never get here on NTLMv2 */
+		&& (ntlmssp_state->nt_resp.length == 0 || ntlmssp_state->nt_resp.length == 24)) {
+
+		if (lm_session_key.data && lm_session_key.length >= 8) {
+			if (ntlmssp_state->lm_resp.data && ntlmssp_state->lm_resp.length == 24) {
+				session_key = data_blob_talloc(ntlmssp_state,
+							       NULL, 16);
+				if (session_key.data == NULL) {
+					return NT_STATUS_NO_MEMORY;
+				}
+				nt_status = SMBsesskeygen_lm_sess_key(lm_session_key.data,
+								      ntlmssp_state->lm_resp.data,
+								      session_key.data);
+				if (!NT_STATUS_IS_OK(nt_status)) {
+					return nt_status;
+				}
+				DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
+			} else {
+				static const uint8_t zeros[24] = {0, };
+				session_key = data_blob_talloc(
+					ntlmssp_state, NULL, 16);
+				if (session_key.data == NULL) {
+					return NT_STATUS_NO_MEMORY;
+				}
+				nt_status = SMBsesskeygen_lm_sess_key(zeros, zeros,
+								      session_key.data);
+				if (!NT_STATUS_IS_OK(nt_status)) {
+					return nt_status;
+				}
+				DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
+			}
+			dump_data_pw("LM session key:\n", session_key.data,
+				     session_key.length);
+		} else {
+			/* LM Key not selected */
+			ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+
+			DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM session key.\n"));
+			session_key = data_blob_null;
+		}
+
+	} else if (user_session_key.data) {
+		session_key = user_session_key;
+		DEBUG(10,("ntlmssp_server_auth: Using unmodified nt session key.\n"));
+		dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
+
+		/* LM Key not selected */
+		ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+
+	} else if (lm_session_key.data) {
+		/* Very weird to have LM key, but no user session key, but anyway.. */
+		session_key = lm_session_key;
+		DEBUG(10,("ntlmssp_server_auth: Using unmodified lm session key.\n"));
+		dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
+
+		/* LM Key not selected */
+		ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+
+	} else {
+		DEBUG(10,("ntlmssp_server_auth: Failed to create unmodified session key.\n"));
+		session_key = data_blob_null;
+
+		/* LM Key not selected */
+		ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+	}
+
+	/* With KEY_EXCH, the client supplies the proposed session key,
+	   but encrypts it with the long-term key */
+	if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
+		if (!state->encrypted_session_key.data
+		    || state->encrypted_session_key.length != 16) {
+			DEBUG(1, ("Client-supplied KEY_EXCH session key was of invalid length (%u)!\n",
+				  (unsigned)state->encrypted_session_key.length));
+			return NT_STATUS_INVALID_PARAMETER;
+		} else if (!session_key.data || session_key.length != 16) {
+			DEBUG(5, ("server session key is invalid (len == %u), cannot do KEY_EXCH!\n",
+				  (unsigned int)session_key.length));
+			ntlmssp_state->session_key = session_key;
+			talloc_steal(ntlmssp_state, session_key.data);
+		} else {
+			gnutls_cipher_hd_t cipher_hnd;
+			gnutls_datum_t enc_session_key = {
+				.data = session_key.data,
+				.size = session_key.length,
+			};
+			int rc;
+
+			dump_data_pw("KEY_EXCH session key (enc):\n",
+				     state->encrypted_session_key.data,
+				     state->encrypted_session_key.length);
+
+			rc = gnutls_cipher_init(&cipher_hnd,
+						GNUTLS_CIPHER_ARCFOUR_128,
+						&enc_session_key,
+						NULL);
+			if (rc < 0) {
+				return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+			}
+			rc = gnutls_cipher_encrypt(cipher_hnd,
+						   state->encrypted_session_key.data,
+						   state->encrypted_session_key.length);
+			gnutls_cipher_deinit(cipher_hnd);
+			if (rc < 0) {
+				return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+			}
+
+			ntlmssp_state->session_key = data_blob_talloc(ntlmssp_state,
+								      state->encrypted_session_key.data,
+								      state->encrypted_session_key.length);
+			dump_data_pw("KEY_EXCH session key:\n",
+				     state->encrypted_session_key.data,
+				     state->encrypted_session_key.length);
+		}
+	} else {
+		ntlmssp_state->session_key = session_key;
+		talloc_steal(ntlmssp_state, session_key.data);
+	}
+
+	if (ntlmssp_state->new_spnego) {
+		gnutls_hmac_hd_t hmac_hnd = NULL;
+		uint8_t mic_buffer[NTLMSSP_MIC_SIZE] = { 0, };
+		bool cmp;
+		int rc;
+
+		rc = gnutls_hmac_init(&hmac_hnd,
+				 GNUTLS_MAC_MD5,
+				 ntlmssp_state->session_key.data,
+				 MIN(ntlmssp_state->session_key.length, 64));
+		if (rc < 0) {
+			return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		}
+		rc = gnutls_hmac(hmac_hnd,
+				 ntlmssp_state->negotiate_blob.data,
+				 ntlmssp_state->negotiate_blob.length);
+		if (rc < 0) {
+			gnutls_hmac_deinit(hmac_hnd, NULL);
+			return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		}
+		rc = gnutls_hmac(hmac_hnd,
+				  ntlmssp_state->challenge_blob.data,
+				  ntlmssp_state->challenge_blob.length);
+		if (rc < 0) {
+			gnutls_hmac_deinit(hmac_hnd, NULL);
+			return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		}
+
+		/* checked were we set ntlmssp_state->new_spnego */
+		SMB_ASSERT(request.length >
+			   (NTLMSSP_MIC_OFFSET + NTLMSSP_MIC_SIZE));
+
+		rc = gnutls_hmac(hmac_hnd, request.data, NTLMSSP_MIC_OFFSET);
+		if (rc < 0) {
+			gnutls_hmac_deinit(hmac_hnd, NULL);
+			return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		}
+		rc = gnutls_hmac(hmac_hnd, mic_buffer, NTLMSSP_MIC_SIZE);
+		if (rc < 0) {
+			gnutls_hmac_deinit(hmac_hnd, NULL);
+			return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		}
+		rc = gnutls_hmac(hmac_hnd,
+				 request.data + (NTLMSSP_MIC_OFFSET + NTLMSSP_MIC_SIZE),
+				 request.length - (NTLMSSP_MIC_OFFSET + NTLMSSP_MIC_SIZE));
+		if (rc < 0) {
+			gnutls_hmac_deinit(hmac_hnd, NULL);
+			return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		}
+		gnutls_hmac_deinit(hmac_hnd, mic_buffer);
+
+		cmp = mem_equal_const_time(request.data + NTLMSSP_MIC_OFFSET,
+					   mic_buffer, NTLMSSP_MIC_SIZE);
+		if (!cmp) {
+			DEBUG(1,("%s: invalid NTLMSSP_MIC for "
+				 "user=[%s] domain=[%s] workstation=[%s]\n",
+				 __func__,
+				 ntlmssp_state->user,
+				 ntlmssp_state->domain,
+				 ntlmssp_state->client.netbios_name));
+			dump_data(11, request.data + NTLMSSP_MIC_OFFSET,
+				  NTLMSSP_MIC_SIZE);
+			dump_data(11, mic_buffer,
+				  NTLMSSP_MIC_SIZE);
+		}
+
+		ZERO_ARRAY(mic_buffer);
+
+		if (!cmp) {
+			return NT_STATUS_INVALID_PARAMETER;
+		}
+	}
+
+	data_blob_free(&ntlmssp_state->negotiate_blob);
+	data_blob_free(&ntlmssp_state->challenge_blob);
+
+	if (gensec_ntlmssp_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
+		if (gensec_security->want_features & GENSEC_FEATURE_LDAP_STYLE) {
+			/*
+			 * We need to handle NTLMSSP_NEGOTIATE_SIGN as
+			 * NTLMSSP_NEGOTIATE_SEAL if GENSEC_FEATURE_LDAP_STYLE
+			 * is requested.
+			 */
+			ntlmssp_state->force_wrap_seal = true;
+		}
+		nt_status = ntlmssp_sign_init(ntlmssp_state);
+	}
+
+	data_blob_clear_free(&ntlmssp_state->internal_chal);
+	data_blob_clear_free(&ntlmssp_state->chal);
+	data_blob_clear_free(&ntlmssp_state->lm_resp);
+	data_blob_clear_free(&ntlmssp_state->nt_resp);
+
+	ntlmssp_state->expected_state = NTLMSSP_DONE;
+
+	return nt_status;
+}
+
+NTSTATUS ntlmssp_server_auth_recv(struct tevent_req *req,
+				  TALLOC_CTX *out_mem_ctx,
+				  DATA_BLOB *out)
+{
+	NTSTATUS status;
+
+	*out = data_blob_null;
+
+	if (tevent_req_is_nterror(req, &status)) {
+		tevent_req_received(req);
+		return status;
+	}
+
+	tevent_req_received(req);
+	return NT_STATUS_OK;
+}
diff --git a/auth/ntlmssp/ntlmssp_sign.c b/auth/ntlmssp/ntlmssp_sign.c
new file mode 100644
index 0000000..11e5930
--- /dev/null
+++ b/auth/ntlmssp/ntlmssp_sign.c
@@ -0,0 +1,893 @@
+/*
+ *  Unix SMB/CIFS implementation.
+ *  Version 3.0
+ *  NTLMSSP Signing routines
+ *  Copyright (C) Andrew Bartlett 2003-2005
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "includes.h"
+#include "../auth/ntlmssp/ntlmssp.h"
+#include "../libcli/auth/libcli_auth.h"
+#include "zlib.h"
+#include "../auth/ntlmssp/ntlmssp_private.h"
+
+#include "lib/crypto/gnutls_helpers.h"
+#include <gnutls/gnutls.h>
+#include <gnutls/crypto.h>
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
+
+#define CLI_SIGN "session key to client-to-server signing key magic constant"
+#define CLI_SEAL "session key to client-to-server sealing key magic constant"
+#define SRV_SIGN "session key to server-to-client signing key magic constant"
+#define SRV_SEAL "session key to server-to-client sealing key magic constant"
+
+/**
+ * Some notes on the NTLM2 code:
+ *
+ * NTLM2 is a AEAD system.  This means that the data encrypted is not
+ * all the data that is signed.  In DCE-RPC case, the headers of the
+ * DCE-RPC packets are also signed.  This prevents some of the
+ * fun-and-games one might have by changing them.
+ *
+ */
+
+static void dump_arc4_state(const char *description,
+			    gnutls_cipher_hd_t *state)
+{
+	DBG_DEBUG("%s\n", description);
+}
+
+static NTSTATUS calc_ntlmv2_key(uint8_t subkey[16],
+				DATA_BLOB session_key,
+				const char *constant)
+{
+	gnutls_hash_hd_t hash_hnd = NULL;
+	int rc;
+
+	rc = gnutls_hash_init(&hash_hnd, GNUTLS_DIG_MD5);
+	if (rc < 0) {
+		return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+	}
+	rc = gnutls_hash(hash_hnd, session_key.data, session_key.length);
+	if (rc < 0) {
+		gnutls_hash_deinit(hash_hnd, NULL);
+		return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+	}
+	rc = gnutls_hash(hash_hnd, constant, strlen(constant) + 1);
+	if (rc < 0) {
+		gnutls_hash_deinit(hash_hnd, NULL);
+		return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+	}
+	gnutls_hash_deinit(hash_hnd, subkey);
+
+	return NT_STATUS_OK;
+}
+
+enum ntlmssp_direction {
+	NTLMSSP_SEND,
+	NTLMSSP_RECEIVE
+};
+
+static NTSTATUS ntlmssp_make_packet_signature(struct ntlmssp_state *ntlmssp_state,
+					      TALLOC_CTX *sig_mem_ctx,
+					      const uint8_t *data, size_t length,
+					      const uint8_t *whole_pdu, size_t pdu_length,
+					      enum ntlmssp_direction direction,
+					      DATA_BLOB *sig, bool encrypt_sig)
+{
+	NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
+	int rc;
+
+	if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
+		gnutls_hmac_hd_t hmac_hnd = NULL;
+		uint8_t digest[16];
+		uint8_t seq_num[4];
+
+		*sig = data_blob_talloc(sig_mem_ctx, NULL, NTLMSSP_SIG_SIZE);
+		if (!sig->data) {
+			return NT_STATUS_NO_MEMORY;
+		}
+
+		switch (direction) {
+		case NTLMSSP_SEND:
+			DEBUG(100,("ntlmssp_make_packet_signature: SEND seq = %u, len = %u, pdu_len = %u\n",
+				ntlmssp_state->crypt->ntlm2.sending.seq_num,
+				(unsigned int)length,
+				(unsigned int)pdu_length));
+
+			SIVAL(seq_num, 0, ntlmssp_state->crypt->ntlm2.sending.seq_num);
+			ntlmssp_state->crypt->ntlm2.sending.seq_num++;
+
+			rc = gnutls_hmac_init(&hmac_hnd,
+					      GNUTLS_MAC_MD5,
+					      ntlmssp_state->crypt->ntlm2.sending.sign_key,
+					      16);
+			if (rc < 0) {
+				return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+			}
+			break;
+		case NTLMSSP_RECEIVE:
+
+			DEBUG(100,("ntlmssp_make_packet_signature: RECV seq = %u, len = %u, pdu_len = %u\n",
+				ntlmssp_state->crypt->ntlm2.receiving.seq_num,
+				(unsigned int)length,
+				(unsigned int)pdu_length));
+
+			SIVAL(seq_num, 0, ntlmssp_state->crypt->ntlm2.receiving.seq_num);
+			ntlmssp_state->crypt->ntlm2.receiving.seq_num++;
+
+			rc = gnutls_hmac_init(&hmac_hnd,
+					      GNUTLS_MAC_MD5,
+					      ntlmssp_state->crypt->ntlm2.receiving.sign_key,
+					      16);
+			if (rc < 0) {
+				return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+			}
+			break;
+		}
+
+		dump_data_pw("pdu data ", whole_pdu, pdu_length);
+
+		rc = gnutls_hmac(hmac_hnd, seq_num, sizeof(seq_num));
+		if (rc < 0) {
+			gnutls_hmac_deinit(hmac_hnd, NULL);
+			return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		}
+		rc = gnutls_hmac(hmac_hnd, whole_pdu, pdu_length);
+		if (rc < 0) {
+			gnutls_hmac_deinit(hmac_hnd, NULL);
+			return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		}
+		gnutls_hmac_deinit(hmac_hnd, digest);
+
+		if (encrypt_sig && (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH)) {
+			switch (direction) {
+			case NTLMSSP_SEND:
+				rc = gnutls_cipher_encrypt(ntlmssp_state->crypt->ntlm2.sending.seal_state,
+							   digest,
+							   8);
+				break;
+			case NTLMSSP_RECEIVE:
+				rc = gnutls_cipher_encrypt(ntlmssp_state->crypt->ntlm2.receiving.seal_state,
+							   digest,
+							   8);
+				break;
+			}
+			if (rc < 0) {
+				DBG_ERR("gnutls_cipher_encrypt for NTLMv2 EXCH "
+					"%s packet signature failed: %s\n",
+					direction == NTLMSSP_SEND ?
+						"send" : "receive",
+					gnutls_strerror(rc));
+				return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+			}
+		}
+
+		SIVAL(sig->data, 0, NTLMSSP_SIGN_VERSION);
+		memcpy(sig->data + 4, digest, 8);
+		ZERO_ARRAY(digest);
+		memcpy(sig->data + 12, seq_num, 4);
+		ZERO_ARRAY(seq_num);
+
+		dump_data_pw("ntlmssp v2 sig ", sig->data, sig->length);
+
+	} else {
+		uint32_t crc;
+
+		crc = crc32(0, Z_NULL, 0);
+		crc = crc32(crc, data, length);
+
+		status = msrpc_gen(sig_mem_ctx,
+			       sig, "dddd",
+			       NTLMSSP_SIGN_VERSION, 0, crc,
+			       ntlmssp_state->crypt->ntlm.seq_num);
+		if (!NT_STATUS_IS_OK(status)) {
+			return status;
+		}
+
+		ntlmssp_state->crypt->ntlm.seq_num++;
+
+		dump_arc4_state("ntlmssp hash: \n",
+				&ntlmssp_state->crypt->ntlm.seal_state);
+		rc = gnutls_cipher_encrypt(ntlmssp_state->crypt->ntlm.seal_state,
+					   sig->data + 4,
+					   sig->length - 4);
+		if (rc < 0) {
+			DBG_ERR("gnutls_cipher_encrypt for NTLM packet "
+				"signature failed: %s\n",
+				gnutls_strerror(rc));
+			return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		}
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS ntlmssp_sign_packet(struct ntlmssp_state *ntlmssp_state,
+			     TALLOC_CTX *sig_mem_ctx,
+			     const uint8_t *data, size_t length,
+			     const uint8_t *whole_pdu, size_t pdu_length,
+			     DATA_BLOB *sig)
+{
+	NTSTATUS nt_status;
+
+	if (!(ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SIGN)) {
+		DEBUG(3, ("NTLMSSP Signing not negotiated - cannot sign packet!\n"));
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	if (!ntlmssp_state->session_key.length) {
+		DEBUG(3, ("NO session key, cannot check sign packet\n"));
+		return NT_STATUS_NO_USER_SESSION_KEY;
+	}
+
+	nt_status = ntlmssp_make_packet_signature(ntlmssp_state,
+						  sig_mem_ctx,
+						  data, length,
+						  whole_pdu, pdu_length,
+						  NTLMSSP_SEND, sig, true);
+
+	return nt_status;
+}
+
+/**
+ * Check the signature of an incoming packet
+ * @note caller *must* check that the signature is the size it expects
+ *
+ */
+
+NTSTATUS ntlmssp_check_packet(struct ntlmssp_state *ntlmssp_state,
+			      const uint8_t *data, size_t length,
+			      const uint8_t *whole_pdu, size_t pdu_length,
+			      const DATA_BLOB *sig)
+{
+	DATA_BLOB local_sig;
+	NTSTATUS nt_status;
+	TALLOC_CTX *tmp_ctx;
+
+	if (!ntlmssp_state->session_key.length) {
+		DEBUG(3, ("NO session key, cannot check packet signature\n"));
+		return NT_STATUS_NO_USER_SESSION_KEY;
+	}
+
+	if (sig->length < 8) {
+		DEBUG(0, ("NTLMSSP packet check failed due to short signature (%lu bytes)!\n",
+			  (unsigned long)sig->length));
+	}
+
+	tmp_ctx = talloc_new(ntlmssp_state);
+	if (!tmp_ctx) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	nt_status = ntlmssp_make_packet_signature(ntlmssp_state,
+						  tmp_ctx,
+						  data, length,
+						  whole_pdu, pdu_length,
+						  NTLMSSP_RECEIVE,
+						  &local_sig, true);
+
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		DEBUG(0,("NTLMSSP packet sig creation failed with %s\n",
+			 nt_errstr(nt_status)));
+		talloc_free(tmp_ctx);
+		return nt_status;
+	}
+
+	if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
+		if (local_sig.length != sig->length ||
+		    !mem_equal_const_time(local_sig.data, sig->data, sig->length)) {
+			DEBUG(5, ("BAD SIG NTLM2: wanted signature of\n"));
+			dump_data(5, local_sig.data, local_sig.length);
+
+			DEBUG(5, ("BAD SIG: got signature of\n"));
+			dump_data(5, sig->data, sig->length);
+
+			DEBUG(0, ("NTLMSSP NTLM2 packet check failed due to invalid signature!\n"));
+			talloc_free(tmp_ctx);
+			return NT_STATUS_ACCESS_DENIED;
+		}
+	} else {
+		if (local_sig.length != sig->length ||
+		    !mem_equal_const_time(local_sig.data + 8, sig->data + 8, sig->length - 8)) {
+			DEBUG(5, ("BAD SIG NTLM1: wanted signature of\n"));
+			dump_data(5, local_sig.data, local_sig.length);
+
+			DEBUG(5, ("BAD SIG: got signature of\n"));
+			dump_data(5, sig->data, sig->length);
+
+			DEBUG(0, ("NTLMSSP NTLM1 packet check failed due to invalid signature!\n"));
+			talloc_free(tmp_ctx);
+			return NT_STATUS_ACCESS_DENIED;
+		}
+	}
+	dump_data_pw("checked ntlmssp signature\n", sig->data, sig->length);
+	DEBUG(10,("ntlmssp_check_packet: NTLMSSP signature OK !\n"));
+
+	talloc_free(tmp_ctx);
+	return NT_STATUS_OK;
+}
+
+/**
+ * Seal data with the NTLMSSP algorithm
+ *
+ */
+
+NTSTATUS ntlmssp_seal_packet(struct ntlmssp_state *ntlmssp_state,
+			     TALLOC_CTX *sig_mem_ctx,
+			     uint8_t *data, size_t length,
+			     const uint8_t *whole_pdu, size_t pdu_length,
+			     DATA_BLOB *sig)
+{
+	int rc;
+
+	if (!(ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SEAL)) {
+		DEBUG(3, ("NTLMSSP Sealing not negotiated - cannot seal packet!\n"));
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	if (!(ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SIGN)) {
+		DEBUG(3, ("NTLMSSP Sealing not negotiated - cannot seal packet!\n"));
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	if (!ntlmssp_state->session_key.length) {
+		DEBUG(3, ("NO session key, cannot seal packet\n"));
+		return NT_STATUS_NO_USER_SESSION_KEY;
+	}
+
+	DEBUG(10,("ntlmssp_seal_data: seal\n"));
+	dump_data_pw("ntlmssp clear data\n", data, length);
+	if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
+		NTSTATUS nt_status;
+		/*
+		 * The order of these two operations matters - we
+		 * must first seal the packet, then seal the
+		 * sequence number - this is because the
+		 * send_seal_hash is not constant, but is is rather
+		 * updated with each iteration
+		 */
+		nt_status = ntlmssp_make_packet_signature(ntlmssp_state,
+							  sig_mem_ctx,
+							  data, length,
+							  whole_pdu, pdu_length,
+							  NTLMSSP_SEND,
+							  sig, false);
+		if (!NT_STATUS_IS_OK(nt_status)) {
+			return nt_status;
+		}
+
+		rc = gnutls_cipher_encrypt(ntlmssp_state->crypt->ntlm2.sending.seal_state,
+					   data,
+					   length);
+		if (rc < 0) {
+			DBG_ERR("gnutls_cipher_encrypt ntlmv2 sealing the data "
+				"failed: %s\n",
+				gnutls_strerror(rc));
+			return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		}
+		if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
+			rc = gnutls_cipher_encrypt(ntlmssp_state->crypt->ntlm2.sending.seal_state,
+						    sig->data + 4,
+						    8);
+			if (rc < 0) {
+				DBG_ERR("gnutls_cipher_encrypt ntlmv2 sealing "
+					"the EXCH signature data failed: %s\n",
+					gnutls_strerror(rc));
+				return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+			}
+		}
+	} else {
+		NTSTATUS status;
+		uint32_t crc;
+
+		crc = crc32(0, Z_NULL, 0);
+		crc = crc32(crc, data, length);
+
+		status = msrpc_gen(sig_mem_ctx,
+			       sig, "dddd",
+			       NTLMSSP_SIGN_VERSION, 0, crc,
+			       ntlmssp_state->crypt->ntlm.seq_num);
+		if (!NT_STATUS_IS_OK(status)) {
+			return status;
+		}
+
+		/*
+		 * The order of these two operations matters - we
+		 * must first seal the packet, then seal the
+		 * sequence number - this is because the ntlmv1_arc4_state
+		 * is not constant, but is is rather updated with
+		 * each iteration
+		 */
+		dump_arc4_state("ntlmv1 arc4 state:\n",
+				&ntlmssp_state->crypt->ntlm.seal_state);
+		rc = gnutls_cipher_encrypt(ntlmssp_state->crypt->ntlm.seal_state,
+					   data,
+					   length);
+		if (rc < 0) {
+			DBG_ERR("gnutls_cipher_encrypt ntlmv1 sealing data"
+				"failed: %s\n",
+				gnutls_strerror(rc));
+			return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		}
+
+		dump_arc4_state("ntlmv1 arc4 state:\n",
+				&ntlmssp_state->crypt->ntlm.seal_state);
+
+		rc = gnutls_cipher_encrypt(ntlmssp_state->crypt->ntlm.seal_state,
+					    sig->data + 4,
+					    sig->length - 4);
+		if (rc < 0) {
+			DBG_ERR("gnutls_cipher_encrypt ntlmv1 sealing signing "
+				"data failed: %s\n",
+				gnutls_strerror(rc));
+			return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		}
+
+		ntlmssp_state->crypt->ntlm.seq_num++;
+	}
+	dump_data_pw("ntlmssp signature\n", sig->data, sig->length);
+	dump_data_pw("ntlmssp sealed data\n", data, length);
+
+	return NT_STATUS_OK;
+}
+
+/**
+ * Unseal data with the NTLMSSP algorithm
+ *
+ */
+
+NTSTATUS ntlmssp_unseal_packet(struct ntlmssp_state *ntlmssp_state,
+			       uint8_t *data, size_t length,
+			       const uint8_t *whole_pdu, size_t pdu_length,
+			       const DATA_BLOB *sig)
+{
+	NTSTATUS status;
+	int rc;
+
+	if (!ntlmssp_state->session_key.length) {
+		DEBUG(3, ("NO session key, cannot unseal packet\n"));
+		return NT_STATUS_NO_USER_SESSION_KEY;
+	}
+
+	DEBUG(10,("ntlmssp_unseal_packet: seal\n"));
+	dump_data_pw("ntlmssp sealed data\n", data, length);
+
+	if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
+		/* First unseal the data. */
+		rc = gnutls_cipher_decrypt(ntlmssp_state->crypt->ntlm2.receiving.seal_state,
+					   data,
+					   length);
+		if (rc < 0) {
+			DBG_ERR("gnutls_cipher_decrypt ntlmv2 unsealing the "
+				"data failed: %s\n",
+				gnutls_strerror(rc));
+			return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		}
+		dump_data_pw("ntlmv2 clear data\n", data, length);
+	} else {
+		rc = gnutls_cipher_decrypt(ntlmssp_state->crypt->ntlm.seal_state,
+					   data,
+					   length);
+		if (rc < 0) {
+			DBG_ERR("gnutls_cipher_decrypt ntlmv1 unsealing the "
+				"data failed: %s\n",
+				gnutls_strerror(rc));
+			return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		}
+		dump_data_pw("ntlmv1 clear data\n", data, length);
+	}
+
+	status = ntlmssp_check_packet(ntlmssp_state,
+				      data, length,
+				      whole_pdu, pdu_length,
+				      sig);
+
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(1,("NTLMSSP packet check for unseal failed due to invalid signature on %llu bytes of input:\n",
+			 (unsigned long long)length));
+	}
+	return status;
+}
+
+NTSTATUS ntlmssp_wrap(struct ntlmssp_state *ntlmssp_state,
+		      TALLOC_CTX *out_mem_ctx,
+		      const DATA_BLOB *in,
+		      DATA_BLOB *out)
+{
+	NTSTATUS nt_status;
+	DATA_BLOB sig;
+
+	if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SEAL) {
+		if (in->length + NTLMSSP_SIG_SIZE < in->length) {
+			return NT_STATUS_INVALID_PARAMETER;
+		}
+
+		*out = data_blob_talloc(out_mem_ctx, NULL, in->length + NTLMSSP_SIG_SIZE);
+		if (!out->data) {
+			return NT_STATUS_NO_MEMORY;
+		}
+		memcpy(out->data + NTLMSSP_SIG_SIZE, in->data, in->length);
+
+	        nt_status = ntlmssp_seal_packet(ntlmssp_state, out_mem_ctx,
+						out->data + NTLMSSP_SIG_SIZE,
+						out->length - NTLMSSP_SIG_SIZE,
+						out->data + NTLMSSP_SIG_SIZE,
+						out->length - NTLMSSP_SIG_SIZE,
+						&sig);
+
+		if (NT_STATUS_IS_OK(nt_status)) {
+			memcpy(out->data, sig.data, NTLMSSP_SIG_SIZE);
+			talloc_free(sig.data);
+		}
+		return nt_status;
+
+	} else if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SIGN) {
+		if (in->length + NTLMSSP_SIG_SIZE < in->length) {
+			return NT_STATUS_INVALID_PARAMETER;
+		}
+
+		*out = data_blob_talloc(out_mem_ctx, NULL, in->length + NTLMSSP_SIG_SIZE);
+		if (!out->data) {
+			return NT_STATUS_NO_MEMORY;
+		}
+		memcpy(out->data + NTLMSSP_SIG_SIZE, in->data, in->length);
+
+	        nt_status = ntlmssp_sign_packet(ntlmssp_state, out_mem_ctx,
+						out->data + NTLMSSP_SIG_SIZE,
+						out->length - NTLMSSP_SIG_SIZE,
+						out->data + NTLMSSP_SIG_SIZE,
+						out->length - NTLMSSP_SIG_SIZE,
+						&sig);
+
+		if (NT_STATUS_IS_OK(nt_status)) {
+			memcpy(out->data, sig.data, NTLMSSP_SIG_SIZE);
+			talloc_free(sig.data);
+		}
+		return nt_status;
+	} else {
+		*out = data_blob_talloc(out_mem_ctx, in->data, in->length);
+		if (!out->data) {
+			return NT_STATUS_NO_MEMORY;
+		}
+		return NT_STATUS_OK;
+	}
+}
+
+NTSTATUS ntlmssp_unwrap(struct ntlmssp_state *ntlmssp_state,
+			TALLOC_CTX *out_mem_ctx,
+			const DATA_BLOB *in,
+			DATA_BLOB *out)
+{
+	DATA_BLOB sig;
+
+	if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SEAL) {
+		if (in->length < NTLMSSP_SIG_SIZE) {
+			return NT_STATUS_INVALID_PARAMETER;
+		}
+		sig.data = in->data;
+		sig.length = NTLMSSP_SIG_SIZE;
+
+		*out = data_blob_talloc(out_mem_ctx, in->data + NTLMSSP_SIG_SIZE, in->length - NTLMSSP_SIG_SIZE);
+
+	        return ntlmssp_unseal_packet(ntlmssp_state,
+					     out->data, out->length,
+					     out->data, out->length,
+					     &sig);
+
+	} else if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SIGN) {
+		if (in->length < NTLMSSP_SIG_SIZE) {
+			return NT_STATUS_INVALID_PARAMETER;
+		}
+		sig.data = in->data;
+		sig.length = NTLMSSP_SIG_SIZE;
+
+		*out = data_blob_talloc(out_mem_ctx, in->data + NTLMSSP_SIG_SIZE, in->length - NTLMSSP_SIG_SIZE);
+
+		return ntlmssp_check_packet(ntlmssp_state,
+					    out->data, out->length,
+					    out->data, out->length,
+					    &sig);
+	} else {
+		*out = data_blob_talloc(out_mem_ctx, in->data, in->length);
+		if (!out->data) {
+			return NT_STATUS_NO_MEMORY;
+		}
+		return NT_STATUS_OK;
+	}
+}
+
+/**
+   Initialise the state for NTLMSSP signing.
+*/
+NTSTATUS ntlmssp_sign_reset(struct ntlmssp_state *ntlmssp_state,
+			    bool reset_seqnums)
+{
+	int rc;
+
+	DEBUG(3, ("NTLMSSP Sign/Seal - Initialising with flags:\n"));
+	debug_ntlmssp_flags(ntlmssp_state->neg_flags);
+
+	if (ntlmssp_state->crypt == NULL) {
+		return NT_STATUS_INVALID_PARAMETER_MIX;
+	}
+
+	if (ntlmssp_state->force_wrap_seal &&
+	    (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SIGN))
+	{
+		/*
+		 * We need to handle NTLMSSP_NEGOTIATE_SIGN as
+		 * NTLMSSP_NEGOTIATE_SEAL if GENSEC_FEATURE_LDAP_STYLE
+		 * is requested.
+		 *
+		 * The negotiation of flags (and authentication)
+		 * is completed when ntlmssp_sign_init() is called
+		 * so we can safely pretent NTLMSSP_NEGOTIATE_SEAL
+		 * was negotiated.
+		 */
+		ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
+	}
+
+	if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
+		DATA_BLOB weak_session_key = ntlmssp_state->session_key;
+		const char *send_sign_const;
+		const char *send_seal_const;
+		const char *recv_sign_const;
+		const char *recv_seal_const;
+		uint8_t send_seal_key[16] = {0};
+		gnutls_datum_t send_seal_blob = {
+			.data = send_seal_key,
+			.size = sizeof(send_seal_key),
+		};
+		uint8_t recv_seal_key[16] = {0};
+		gnutls_datum_t recv_seal_blob = {
+			.data = recv_seal_key,
+			.size = sizeof(recv_seal_key),
+		};
+		NTSTATUS status;
+
+		switch (ntlmssp_state->role) {
+		case NTLMSSP_CLIENT:
+			send_sign_const = CLI_SIGN;
+			send_seal_const = CLI_SEAL;
+			recv_sign_const = SRV_SIGN;
+			recv_seal_const = SRV_SEAL;
+			break;
+		case NTLMSSP_SERVER:
+			send_sign_const = SRV_SIGN;
+			send_seal_const = SRV_SEAL;
+			recv_sign_const = CLI_SIGN;
+			recv_seal_const = CLI_SEAL;
+			break;
+		default:
+			return NT_STATUS_INTERNAL_ERROR;
+		}
+
+		/*
+		 * Weaken NTLMSSP keys to cope with down-level
+		 * clients, servers and export restrictions.
+		 *
+		 * We probably should have some parameters to
+		 * control this, once we get NTLM2 working.
+		 *
+		 * Key weakening was not performed on the master key
+		 * for NTLM2, but must be done on the encryption subkeys only.
+		 */
+
+		if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_128) {
+			/* nothing to do */
+		} else if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_56) {
+			weak_session_key.length = 7;
+		} else { /* forty bits */
+			weak_session_key.length = 5;
+		}
+
+		dump_data_pw("NTLMSSP weakend master key:\n",
+			     weak_session_key.data,
+			     weak_session_key.length);
+
+		/* SEND: sign key */
+		status = calc_ntlmv2_key(ntlmssp_state->crypt->ntlm2.sending.sign_key,
+					 ntlmssp_state->session_key, send_sign_const);
+		if (!NT_STATUS_IS_OK(status)) {
+			return status;
+		}
+		dump_data_pw("NTLMSSP send sign key:\n",
+			     ntlmssp_state->crypt->ntlm2.sending.sign_key, 16);
+
+		/* SEND: seal ARCFOUR pad */
+		status = calc_ntlmv2_key(send_seal_key,
+					 weak_session_key,
+					 send_seal_const);
+		if (!NT_STATUS_IS_OK(status)) {
+			return status;
+		}
+		dump_data_pw("NTLMSSP send seal key:\n",
+			     send_seal_key,
+			     sizeof(send_seal_key));
+
+		if (ntlmssp_state->crypt->ntlm2.sending.seal_state != NULL) {
+			gnutls_cipher_deinit(ntlmssp_state->crypt->ntlm2.sending.seal_state);
+		}
+		rc = gnutls_cipher_init(&ntlmssp_state->crypt->ntlm2.sending.seal_state,
+					GNUTLS_CIPHER_ARCFOUR_128,
+					&send_seal_blob,
+					NULL);
+		if (rc < 0) {
+			DBG_ERR("gnutls_cipher_init failed: %s\n",
+				gnutls_strerror(rc));
+			return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		}
+
+		dump_arc4_state("NTLMSSP send seal arc4 state:\n",
+				&ntlmssp_state->crypt->ntlm2.sending.seal_state);
+
+		/* SEND: seq num */
+		if (reset_seqnums) {
+			ntlmssp_state->crypt->ntlm2.sending.seq_num = 0;
+		}
+
+		/* RECV: sign key */
+		status = calc_ntlmv2_key(ntlmssp_state->crypt->ntlm2.receiving.sign_key,
+					 ntlmssp_state->session_key, recv_sign_const);
+		if (!NT_STATUS_IS_OK(status)) {
+			return status;
+		}
+		dump_data_pw("NTLMSSP recv sign key:\n",
+			     ntlmssp_state->crypt->ntlm2.receiving.sign_key, 16);
+
+		/* RECV: seal ARCFOUR pad */
+		status = calc_ntlmv2_key(recv_seal_key,
+					 weak_session_key,
+					 recv_seal_const);
+		if (!NT_STATUS_IS_OK(status)) {
+			return status;
+		}
+		dump_data_pw("NTLMSSP recv seal key:\n",
+			     recv_seal_key,
+			     sizeof(recv_seal_key));
+
+		if (ntlmssp_state->crypt->ntlm2.receiving.seal_state != NULL) {
+			gnutls_cipher_deinit(ntlmssp_state->crypt->ntlm2.receiving.seal_state);
+		}
+		rc = gnutls_cipher_init(&ntlmssp_state->crypt->ntlm2.receiving.seal_state,
+					GNUTLS_CIPHER_ARCFOUR_128,
+					&recv_seal_blob,
+					NULL);
+		if (rc < 0) {
+			DBG_ERR("gnutls_cipher_init failed: %s\n",
+				gnutls_strerror(rc));
+			return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		}
+
+		dump_arc4_state("NTLMSSP recv seal arc4 state:\n",
+				&ntlmssp_state->crypt->ntlm2.receiving.seal_state);
+
+		/* RECV: seq num */
+		if (reset_seqnums) {
+			ntlmssp_state->crypt->ntlm2.receiving.seq_num = 0;
+		}
+	} else {
+		gnutls_datum_t seal_session_key = {
+			.data = ntlmssp_state->session_key.data,
+			.size = ntlmssp_state->session_key.length,
+		};
+		bool do_weak = false;
+
+		DEBUG(5, ("NTLMSSP Sign/Seal - using NTLM1\n"));
+
+		/*
+		 * Key weakening not performed on the master key for NTLM2
+		 * and does not occour for NTLM1. Therefore we only need
+		 * to do this for the LM_KEY.
+		 */
+		if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY) {
+			do_weak = true;
+		}
+
+		/*
+		 * Nothing to weaken.
+		 * We certainly don't want to 'extend' the length...
+		 */
+		if (ntlmssp_state->session_key.length < 16) {
+			/* TODO: is this really correct? */
+			do_weak = false;
+		}
+
+		if (do_weak) {
+			uint8_t weak_session_key[8];
+
+			memcpy(weak_session_key, seal_session_key.data, 8);
+			seal_session_key = (gnutls_datum_t) {
+				.data = weak_session_key,
+				.size = sizeof(weak_session_key),
+			};
+
+			/*
+			 * LM key doesn't support 128 bit crypto, so this is
+			 * the best we can do. If you negotiate 128 bit, but
+			 * not 56, you end up with 40 bit...
+			 */
+			if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_56) {
+				weak_session_key[7] = 0xa0;
+			} else { /* forty bits */
+				weak_session_key[5] = 0xe5;
+				weak_session_key[6] = 0x38;
+				weak_session_key[7] = 0xb0;
+			}
+		}
+
+		if (ntlmssp_state->crypt->ntlm.seal_state != NULL) {
+			gnutls_cipher_deinit(ntlmssp_state->crypt->ntlm.seal_state);
+		}
+		rc = gnutls_cipher_init(&ntlmssp_state->crypt->ntlm.seal_state,
+					GNUTLS_CIPHER_ARCFOUR_128,
+					&seal_session_key,
+					NULL);
+		if (rc < 0) {
+			DBG_ERR("gnutls_cipher_init failed: %s\n",
+				gnutls_strerror(rc));
+			return gnutls_error_to_ntstatus(rc, NT_STATUS_NTLM_BLOCKED);
+		}
+
+		dump_arc4_state("NTLMv1 arc4 state:\n",
+				&ntlmssp_state->crypt->ntlm.seal_state);
+
+		if (reset_seqnums) {
+			ntlmssp_state->crypt->ntlm.seq_num = 0;
+		}
+	}
+
+	return NT_STATUS_OK;
+}
+
+static int ntlmssp_crypt_free_gnutls_cipher_state(union ntlmssp_crypt_state *c)
+{
+	if (c->ntlm2.sending.seal_state != NULL) {
+		gnutls_cipher_deinit(c->ntlm2.sending.seal_state);
+		c->ntlm2.sending.seal_state = NULL;
+	}
+	if (c->ntlm2.receiving.seal_state != NULL) {
+		gnutls_cipher_deinit(c->ntlm2.receiving.seal_state);
+		c->ntlm2.receiving.seal_state = NULL;
+	}
+	if (c->ntlm.seal_state != NULL) {
+		gnutls_cipher_deinit(c->ntlm.seal_state);
+		c->ntlm.seal_state = NULL;
+	}
+
+	return 0;
+}
+
+NTSTATUS ntlmssp_sign_init(struct ntlmssp_state *ntlmssp_state)
+{
+	if (ntlmssp_state->session_key.length < 8) {
+		DEBUG(3, ("NO session key, cannot initialise signing\n"));
+		return NT_STATUS_NO_USER_SESSION_KEY;
+	}
+
+	ntlmssp_state->crypt = talloc_zero(ntlmssp_state,
+					   union ntlmssp_crypt_state);
+	if (ntlmssp_state->crypt == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+	talloc_set_destructor(ntlmssp_state->crypt,
+			      ntlmssp_crypt_free_gnutls_cipher_state);
+
+	return ntlmssp_sign_reset(ntlmssp_state, true);
+}
diff --git a/auth/ntlmssp/ntlmssp_util.c b/auth/ntlmssp/ntlmssp_util.c
new file mode 100644
index 0000000..6f3b474
--- /dev/null
+++ b/auth/ntlmssp/ntlmssp_util.c
@@ -0,0 +1,220 @@
+/*
+   Unix SMB/Netbios implementation.
+   Version 3.0
+   handle NLTMSSP, server side
+
+   Copyright (C) Andrew Tridgell      2001
+   Copyright (C) Andrew Bartlett 2001-2003
+   Copyright (C) Andrew Bartlett 2005 (Updated from gensec).
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "../auth/ntlmssp/ntlmssp.h"
+#include "../auth/ntlmssp/ntlmssp_private.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
+
+static void debug_ntlmssp_flags_raw(int level, uint32_t flags)
+{
+#define _PRINT_FLAG_LINE(v) do { \
+	if (flags & (v)) { \
+		DEBUGADD(level, ("  " #v "\n")); \
+	} \
+} while (0)
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_UNICODE);
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_OEM);
+	_PRINT_FLAG_LINE(NTLMSSP_REQUEST_TARGET);
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_SIGN);
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_SEAL);
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_DATAGRAM);
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_LM_KEY);
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_NETWARE);
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_NTLM);
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_NT_ONLY);
+	_PRINT_FLAG_LINE(NTLMSSP_ANONYMOUS);
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_OEM_DOMAIN_SUPPLIED);
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_OEM_WORKSTATION_SUPPLIED);
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_THIS_IS_LOCAL_CALL);
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_ALWAYS_SIGN);
+	_PRINT_FLAG_LINE(NTLMSSP_TARGET_TYPE_DOMAIN);
+	_PRINT_FLAG_LINE(NTLMSSP_TARGET_TYPE_SERVER);
+	_PRINT_FLAG_LINE(NTLMSSP_TARGET_TYPE_SHARE);
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_EXTENDED_SESSIONSECURITY);
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_IDENTIFY);
+	_PRINT_FLAG_LINE(NTLMSSP_REQUEST_NON_NT_SESSION_KEY);
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_TARGET_INFO);
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_VERSION);
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_128);
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_KEY_EXCH);
+	_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_56);
+}
+
+/**
+ * Print out the NTLMSSP flags for debugging
+ * @param neg_flags The flags from the packet
+ */
+void debug_ntlmssp_flags(uint32_t neg_flags)
+{
+	DEBUG(3,("Got NTLMSSP neg_flags=0x%08x\n", neg_flags));
+	debug_ntlmssp_flags_raw(4, neg_flags);
+}
+
+NTSTATUS ntlmssp_handle_neg_flags(struct ntlmssp_state *ntlmssp_state,
+				  uint32_t flags, const char *name)
+{
+	uint32_t missing_flags = ntlmssp_state->required_flags;
+
+	if (ntlmssp_state->use_ntlmv2) {
+		/*
+		 * Using NTLMv2 as a client implies
+		 * using NTLMSSP_NEGOTIATE_NTLM2
+		 * (NTLMSSP_NEGOTIATE_EXTENDED_SESSIONSECURITY)
+		 *
+		 * Note that 'use_ntlmv2' is only set
+		 * true in the client case.
+		 *
+		 * Even if the server has a bug and does not announce
+		 * it, we need to assume it's present.
+		 *
+		 * Note that we also have the flag
+		 * in ntlmssp_state->required_flags,
+		 * see gensec_ntlmssp_client_start().
+		 *
+		 * See bug #12862.
+		 */
+		flags |= NTLMSSP_NEGOTIATE_NTLM2;
+	}
+
+	if (flags & NTLMSSP_NEGOTIATE_UNICODE) {
+		ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
+		ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_OEM;
+		ntlmssp_state->unicode = true;
+	} else {
+		ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_UNICODE;
+		ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
+		ntlmssp_state->unicode = false;
+	}
+
+	/*
+	 * NTLMSSP_NEGOTIATE_NTLM2 (NTLMSSP_NEGOTIATE_EXTENDED_SESSIONSECURITY)
+	 * has priority over NTLMSSP_NEGOTIATE_LM_KEY
+	 */
+	if (!(flags & NTLMSSP_NEGOTIATE_NTLM2)) {
+		ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
+	}
+
+	if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
+		ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+	}
+
+	if (!(flags & NTLMSSP_NEGOTIATE_LM_KEY)) {
+		ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+	}
+
+	if (!(flags & NTLMSSP_NEGOTIATE_ALWAYS_SIGN)) {
+		ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
+	}
+
+	if (!(flags & NTLMSSP_NEGOTIATE_128)) {
+		ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_128;
+	}
+
+	if (!(flags & NTLMSSP_NEGOTIATE_56)) {
+		ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_56;
+	}
+
+	if (!(flags & NTLMSSP_NEGOTIATE_KEY_EXCH)) {
+		ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_KEY_EXCH;
+	}
+
+	if (!(flags & NTLMSSP_NEGOTIATE_SIGN)) {
+		ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_SIGN;
+	}
+
+	if (!(flags & NTLMSSP_NEGOTIATE_SEAL)) {
+		ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_SEAL;
+	}
+
+	if ((flags & NTLMSSP_REQUEST_TARGET)) {
+		ntlmssp_state->neg_flags |= NTLMSSP_REQUEST_TARGET;
+	}
+
+	missing_flags &= ~ntlmssp_state->neg_flags;
+	if (missing_flags != 0) {
+		HRESULT hres = HRES_SEC_E_UNSUPPORTED_FUNCTION;
+		NTSTATUS status = NT_STATUS(HRES_ERROR_V(hres));
+		DEBUG(1, ("%s: Got %s flags[0x%08x] "
+			  "- possible downgrade detected! "
+			  "missing_flags[0x%08x] - %s\n",
+			  __func__, name,
+			  (unsigned)flags,
+			  (unsigned)missing_flags,
+			  nt_errstr(status)));
+		debug_ntlmssp_flags_raw(1, missing_flags);
+		DEBUGADD(4, ("neg_flags[0x%08x]\n",
+			     (unsigned)ntlmssp_state->neg_flags));
+		debug_ntlmssp_flags_raw(4, ntlmssp_state->neg_flags);
+		return status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+/* Does this blob looks like it could be NTLMSSP? */
+bool ntlmssp_blob_matches_magic(const DATA_BLOB *blob)
+{
+	if (blob->length > 8 && memcmp("NTLMSSP\0", blob->data, 8) == 0) {
+		return true;
+	} else {
+		return false;
+	}
+}
+
+const DATA_BLOB ntlmssp_version_blob(void)
+{
+	/*
+	 * This is a simplified version of
+	 *
+	 * enum ndr_err_code err;
+	 * struct ntlmssp_VERSION vers;
+	 *
+	 * ZERO_STRUCT(vers);
+	 * vers.ProductMajorVersion = NTLMSSP_WINDOWS_MAJOR_VERSION_6;
+	 * vers.ProductMinorVersion = NTLMSSP_WINDOWS_MINOR_VERSION_1;
+	 * vers.ProductBuild = 0;
+	 * vers.NTLMRevisionCurrent = NTLMSSP_REVISION_W2K3;
+	 *
+	 * err = ndr_push_struct_blob(&version_blob,
+	 * 			ntlmssp_state,
+	 * 			&vers,
+	 * 			(ndr_push_flags_fn_t)ndr_push_ntlmssp_VERSION);
+	 *
+	 * if (!NDR_ERR_CODE_IS_SUCCESS(err)) {
+	 * 	data_blob_free(&struct_blob);
+	 * 	return NT_STATUS_NO_MEMORY;
+	 * }
+	 */
+	static const uint8_t version_buffer[8] = {
+		NTLMSSP_WINDOWS_MAJOR_VERSION_6,
+		NTLMSSP_WINDOWS_MINOR_VERSION_1,
+		0x00, 0x00, /* product build */
+		0x00, 0x00, 0x00, /* reserved */
+		NTLMSSP_REVISION_W2K3
+	};
+
+	return data_blob_const(version_buffer, ARRAY_SIZE(version_buffer));
+}
diff --git a/auth/ntlmssp/wscript_build b/auth/ntlmssp/wscript_build
new file mode 100644
index 0000000..20836ef
--- /dev/null
+++ b/auth/ntlmssp/wscript_build
@@ -0,0 +1,27 @@
+bld.SAMBA_SUBSYSTEM('NTLMSSP_COMMON',
+                    source='''gensec_ntlmssp.c
+		    ntlmssp.c
+		    ntlmssp_util.c
+		    ntlmssp_ndr.c
+		    ntlmssp_client.c
+		    ntlmssp_server.c
+		    ntlmssp_sign.c
+		    gensec_ntlmssp_server.c''',
+                    deps='''
+		         samba-util
+			 NDR_NTLMSSP
+			 MSRPC_PARSE
+			 NTLM_CHECK
+			 samba-credentials
+			 wbclient
+			 z
+			 GNUTLS_HELPERS
+			 ''')
+
+bld.SAMBA_MODULE('gensec_ntlmssp',
+	source='''''',
+	subsystem='gensec',
+	init_function='gensec_ntlmssp_init',
+	deps='NTLMSSP_COMMON',
+	internal_module=True
+	)