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, 326 insertions, 0 deletions

diff --git a/source3/auth/auth_ntlmssp.c b/source3/auth/auth_ntlmssp.c
new file mode 100644
index 0000000..73938dc
--- /dev/null
+++ b/source3/auth/auth_ntlmssp.c
@@ -0,0 +1,326 @@
+/* 
+   Unix SMB/Netbios implementation.
+   Version 3.0
+   handle NLTMSSP, server side
+
+   Copyright (C) Andrew Tridgell      2001
+   Copyright (C) Andrew Bartlett 2001-2005,2011
+   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 "auth.h"
+#include "libcli/security/security.h"
+#include "lib/util/tevent_ntstatus.h"
+#include "source3/lib/substitute.h"
+
+NTSTATUS auth3_generate_session_info(struct auth4_context *auth_context,
+				     TALLOC_CTX *mem_ctx,
+				     void *server_returned_info,
+				     const char *original_user_name,
+				     uint32_t session_info_flags,
+				     struct auth_session_info **session_info)
+{
+	struct auth_user_info_dc *user_info = NULL;
+	struct auth_serversupplied_info *server_info = NULL;
+	NTSTATUS nt_status;
+
+	/*
+	 * This is a hack, some callers...
+	 *
+	 * Some callers pass auth_user_info_dc, the SCHANNEL and
+	 * NCALRPC_AS_SYSTEM gensec modules.
+	 *
+	 * While the rest passes auth3_check_password() returned.
+	 */
+	user_info = talloc_get_type(server_returned_info,
+				    struct auth_user_info_dc);
+	if (user_info != NULL) {
+		const struct dom_sid *sid;
+		int cmp;
+
+		/*
+		 * This should only be called from SCHANNEL or NCALRPC_AS_SYSTEM
+		 */
+		if (user_info->num_sids != 1) {
+			return NT_STATUS_INTERNAL_ERROR;
+		}
+		sid = &user_info->sids[PRIMARY_USER_SID_INDEX].sid;
+
+		cmp = dom_sid_compare(sid, &global_sid_System);
+		if (cmp == 0) {
+			return make_session_info_system(mem_ctx, session_info);
+		}
+
+		cmp = dom_sid_compare(sid, &global_sid_Anonymous);
+		if (cmp == 0) {
+			return make_session_info_anonymous(mem_ctx, session_info);
+		}
+
+		return NT_STATUS_INTERNAL_ERROR;
+	}
+
+	server_info = talloc_get_type_abort(server_returned_info,
+					    struct auth_serversupplied_info);
+	nt_status = create_local_token(mem_ctx,
+				       server_info,
+				       NULL,
+				       original_user_name,
+				       session_info);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		DEBUG(10, ("create_local_token failed: %s\n",
+			   nt_errstr(nt_status)));
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+/**
+ * Return the challenge as determined by the authentication subsystem 
+ * @return an 8 byte random challenge
+ */
+
+NTSTATUS auth3_get_challenge(struct auth4_context *auth4_context,
+					   uint8_t chal[8])
+{
+	struct auth_context *auth_context = talloc_get_type_abort(auth4_context->private_data,
+								  struct auth_context);
+	auth_get_ntlm_challenge(auth_context, chal);
+	return NT_STATUS_OK;
+}
+
+/**
+ * NTLM2 authentication modifies the effective challenge, 
+ * @param challenge The new challenge value
+ */
+NTSTATUS auth3_set_challenge(struct auth4_context *auth4_context, const uint8_t *chal,
+			     const char *challenge_set_by)
+{
+	struct auth_context *auth_context = talloc_get_type_abort(auth4_context->private_data,
+								  struct auth_context);
+	bool ok;
+
+	ok = auth3_context_set_challenge(auth_context, chal, challenge_set_by);
+	if (!ok) {
+		/*
+		 * This can only fail for ENOMEM
+		 */
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	DEBUG(5, ("auth_context challenge set by %s\n", auth_context->challenge_set_by));
+	DEBUG(5, ("challenge is: \n"));
+	dump_data(5, auth_context->challenge.data, auth_context->challenge.length);
+	return NT_STATUS_OK;
+}
+
+/**
+ * Check the password on an NTLMSSP login.  
+ *
+ * Return the session keys used on the connection.
+ */
+
+struct auth3_check_password_state {
+	uint8_t authoritative;
+	void *server_info;
+	DATA_BLOB nt_session_key;
+	DATA_BLOB lm_session_key;
+};
+
+struct tevent_req *auth3_check_password_send(
+	TALLOC_CTX *mem_ctx,
+	struct tevent_context *ev,
+	struct auth4_context *auth4_context,
+	const struct auth_usersupplied_info *user_info)
+{
+	struct tevent_req *req = NULL;
+	struct auth3_check_password_state *state = NULL;
+	struct auth_context *auth_context = talloc_get_type_abort(
+		auth4_context->private_data, struct auth_context);
+	struct auth_usersupplied_info *mapped_user_info = NULL;
+	struct auth_serversupplied_info *server_info = NULL;
+	char *sanitized_username = NULL;
+	NTSTATUS nt_status;
+	bool username_was_mapped;
+
+	req = tevent_req_create(
+		mem_ctx, &state, struct auth3_check_password_state);
+	if (req == NULL) {
+		return NULL;
+	}
+
+	/*
+	 * Be authoritative by default.
+	 */
+	state->authoritative = 1;
+
+	/* The client has given us its machine name (which we only get over NBT transport).
+	   We need to possibly reload smb.conf if smb.conf includes depend on the machine name. */
+
+	set_remote_machine_name(user_info->workstation_name, True);
+
+	nt_status = make_user_info_map(talloc_tos(),
+                                       &mapped_user_info,
+				       user_info->client.account_name,
+				       user_info->client.domain_name,
+				       user_info->workstation_name,
+				       user_info->remote_host,
+				       user_info->local_host,
+				       user_info->service_description,
+	                               user_info->password.response.lanman.data ? &user_info->password.response.lanman : NULL,
+	                               user_info->password.response.nt.data ? &user_info->password.response.nt : NULL,
+				       NULL, NULL, NULL,
+				       AUTH_PASSWORD_RESPONSE);
+
+	if (tevent_req_nterror(req, nt_status)) {
+		return tevent_req_post(req, ev);
+	}
+
+	mapped_user_info->logon_parameters = user_info->logon_parameters;
+
+	mapped_user_info->flags = user_info->flags;
+
+	sanitized_username = talloc_alpha_strcpy(
+		state,
+		user_info->client.account_name,
+		SAFE_NETBIOS_CHARS "$");
+	if (sanitized_username == NULL) {
+		tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
+		return tevent_req_post(req, ev);
+	}
+
+	nt_status = auth_check_ntlm_password(state,
+					     auth_context,
+					     mapped_user_info,
+					     &server_info,
+					     &state->authoritative);
+
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		DBG_INFO("Checking NTLMSSP password for %s\\%s failed: "
+			 "%s, authoritative=%"PRIu8"\n",
+			 user_info->client.domain_name,
+			 user_info->client.account_name,
+			 nt_errstr(nt_status),
+			 state->authoritative);
+	}
+
+	username_was_mapped = mapped_user_info->was_mapped;
+
+	TALLOC_FREE(mapped_user_info);
+
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		nt_status = do_map_to_guest_server_info(
+			state,
+			nt_status,
+			user_info->client.account_name,
+			user_info->client.domain_name,
+			&server_info);
+		if (!tevent_req_nterror(req, nt_status)) {
+			state->authoritative = 1;
+
+			/* setup the string used by %U */
+			set_current_user_info(
+				sanitized_username,
+				server_info->unix_name,
+				server_info->info3->base.logon_domain.string);
+
+			lp_load_with_shares(get_dyn_CONFIGFILE());
+
+			tevent_req_done(req);
+		}
+		state->server_info = server_info;
+		return tevent_req_post(req, ev);
+	}
+
+	server_info->nss_token |= username_was_mapped;
+
+	/* setup the string used by %U */
+	set_current_user_info(sanitized_username,
+			      server_info->unix_name,
+			      server_info->info3->base.logon_domain.string);
+
+	lp_load_with_shares(get_dyn_CONFIGFILE());
+
+	/* Clear out the session keys, and pass them to the caller.
+	 * They will not be used in this form again - instead the
+	 * NTLMSSP code will decide on the final correct session key,
+	 * and supply it to create_local_token() */
+
+	DBG_DEBUG("Got NT session key of length %zu\n",
+		  server_info->session_key.length);
+	state->nt_session_key = (DATA_BLOB) {
+		.data = talloc_move(
+			state, &server_info->session_key.data),
+		.length = server_info->session_key.length,
+	};
+	server_info->session_key = data_blob_null;
+
+	DBG_DEBUG("Got LM session key of length %zu\n",
+		  server_info->lm_session_key.length);
+	state->lm_session_key = (DATA_BLOB) {
+		.data = talloc_move(
+			state, &server_info->lm_session_key.data),
+		.length = server_info->lm_session_key.length,
+	};
+	server_info->lm_session_key = data_blob_null;
+
+	state->server_info = server_info;
+
+	tevent_req_done(req);
+	return tevent_req_post(req, ev);
+}
+
+NTSTATUS auth3_check_password_recv(struct tevent_req *req,
+				   TALLOC_CTX *mem_ctx,
+				   uint8_t *pauthoritative,
+				   void **server_returned_info,
+				   DATA_BLOB *nt_session_key,
+				   DATA_BLOB *lm_session_key)
+{
+	struct auth3_check_password_state *state = tevent_req_data(
+		req, struct auth3_check_password_state);
+	NTSTATUS status;
+
+	if (pauthoritative != NULL) {
+		*pauthoritative = state->authoritative;
+	}
+
+	if (tevent_req_is_nterror(req, &status)) {
+		return status;
+	}
+
+	if (server_returned_info != NULL) {
+		*server_returned_info = talloc_move(
+			mem_ctx, &state->server_info);
+	}
+	if (nt_session_key != NULL) {
+		*nt_session_key = (DATA_BLOB) {
+			.data = talloc_move(
+				mem_ctx, &state->nt_session_key.data),
+			.length = state->nt_session_key.length,
+		};
+	}
+	if (lm_session_key != NULL) {
+		*lm_session_key = (DATA_BLOB) {
+			.data = talloc_move(
+				mem_ctx, &state->lm_session_key.data),
+			.length = state->lm_session_key.length,
+		};
+	}
+
+	return NT_STATUS_OK;
+}