Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

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

1 files changed, 408 insertions, 0 deletions

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;
+}