Move NTLM authentication details into auth/ntlm

This should help clarify the role of the various files around here
(done on Jelmer's request).

Andrew Bartlett
(This used to be commit efa399037511ced8978f2e7661a71aac7a384883)

1 files changed, 449 insertions, 0 deletions

diff --git a/source4/auth/ntlm/auth_sam.c b/source4/auth/ntlm/auth_sam.c
new file mode 100644
index 0000000000..2c13cd963d
--- /dev/null
+++ b/source4/auth/ntlm/auth_sam.c
@@ -0,0 +1,449 @@
+/* 
+   Unix SMB/CIFS implementation.
+   Password and authentication handling
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2004
+   Copyright (C) Gerald Carter                             2003
+   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 "librpc/gen_ndr/ndr_netlogon.h"
+#include "system/time.h"
+#include "lib/ldb/include/ldb.h"
+#include "util/util_ldb.h"
+#include "auth/auth.h"
+#include "auth/ntlm/ntlm_check.h"
+#include "auth/ntlm/auth_proto.h"
+#include "auth/auth_sam.h"
+#include "dsdb/samdb/samdb.h"
+#include "libcli/security/security.h"
+#include "libcli/ldap/ldap_ndr.h"
+#include "param/param.h"
+
+extern const char *user_attrs[];
+extern const char *domain_ref_attrs[];
+
+/****************************************************************************
+ Look for the specified user in the sam, return ldb result structures
+****************************************************************************/
+
+static NTSTATUS authsam_search_account(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
+				       const char *account_name,
+				       const char *domain_name,
+				       struct ldb_message ***ret_msgs,
+				       struct ldb_message ***ret_msgs_domain_ref)
+{
+	struct ldb_message **msgs_tmp;
+	struct ldb_message **msgs;
+	struct ldb_message **msgs_domain_ref;
+	struct ldb_dn *partitions_basedn = samdb_partitions_dn(sam_ctx, mem_ctx);
+
+	int ret;
+	int ret_domain;
+
+	struct ldb_dn *domain_dn = NULL;
+
+	if (domain_name) {
+		domain_dn = samdb_domain_to_dn(sam_ctx, mem_ctx, domain_name);
+		if (!domain_dn) {
+			return NT_STATUS_INTERNAL_DB_CORRUPTION;
+		}
+	}
+
+	/* pull the user attributes */
+	ret = gendb_search(sam_ctx, mem_ctx, domain_dn, &msgs, user_attrs,
+			   "(&(sAMAccountName=%s)(objectclass=user))", 
+			   ldb_binary_encode_string(mem_ctx, account_name));
+	if (ret == -1) {
+		return NT_STATUS_INTERNAL_DB_CORRUPTION;
+	}
+
+	if (ret == 0) {
+		DEBUG(3,("sam_search_user: Couldn't find user [%s\\%s] in samdb, under %s\n", 
+			 domain_name, account_name, ldb_dn_get_linearized(domain_dn)));
+		return NT_STATUS_NO_SUCH_USER;
+	}
+
+	if (ret > 1) {
+		DEBUG(0,("Found %d records matching user [%s]\n", ret, account_name));
+		return NT_STATUS_INTERNAL_DB_CORRUPTION;
+	}
+
+	if (!domain_dn) {
+		struct dom_sid *domain_sid;
+
+		domain_sid = samdb_result_sid_prefix(mem_ctx, msgs[0], "objectSid");
+		if (!domain_sid) {
+			return NT_STATUS_INTERNAL_DB_CORRUPTION;
+		}
+
+		/* find the domain's DN */
+		ret = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_tmp, NULL,
+				   "(&(objectSid=%s)(objectClass=domain))", 
+				   ldap_encode_ndr_dom_sid(mem_ctx, domain_sid));
+		if (ret == -1) {
+			return NT_STATUS_INTERNAL_DB_CORRUPTION;
+		}
+		
+		if (ret == 0) {
+			DEBUG(3,("check_sam_security: Couldn't find domain_sid [%s] in passdb file.\n",
+				 dom_sid_string(mem_ctx, domain_sid)));
+			return NT_STATUS_NO_SUCH_USER;
+		}
+		
+		if (ret > 1) {
+			DEBUG(0,("Found %d records matching domain_sid [%s]\n", 
+				 ret, dom_sid_string(mem_ctx, domain_sid)));
+			return NT_STATUS_INTERNAL_DB_CORRUPTION;
+		}
+
+		domain_dn = msgs_tmp[0]->dn;
+	}
+
+	ret_domain = gendb_search(sam_ctx, mem_ctx, partitions_basedn, &msgs_domain_ref, domain_ref_attrs,
+				  "(nCName=%s)", ldb_dn_get_linearized(domain_dn));
+	if (ret_domain == -1) {
+		return NT_STATUS_INTERNAL_DB_CORRUPTION;
+	}
+		
+	if (ret_domain == 0) {
+		DEBUG(3,("check_sam_security: Couldn't find domain [%s] in passdb file.\n",
+			 ldb_dn_get_linearized(msgs_tmp[0]->dn)));
+		return NT_STATUS_NO_SUCH_USER;
+	}
+		
+	if (ret_domain > 1) {
+		DEBUG(0,("Found %d records matching domain [%s]\n", 
+			 ret_domain, ldb_dn_get_linearized(msgs_tmp[0]->dn)));
+		return NT_STATUS_INTERNAL_DB_CORRUPTION;
+	}
+
+	*ret_msgs = msgs;
+	*ret_msgs_domain_ref = msgs_domain_ref;
+	
+	return NT_STATUS_OK;
+}
+
+/****************************************************************************
+ Do a specific test for an smb password being correct, given a smb_password and
+ the lanman and NT responses.
+****************************************************************************/
+static NTSTATUS authsam_password_ok(struct auth_context *auth_context,
+				    TALLOC_CTX *mem_ctx,
+				    uint16_t acct_flags,
+				    const struct samr_Password *lm_pwd, 
+				    const struct samr_Password *nt_pwd,
+				    const struct auth_usersupplied_info *user_info, 
+				    DATA_BLOB *user_sess_key, 
+				    DATA_BLOB *lm_sess_key)
+{
+	NTSTATUS status;
+
+	if (acct_flags & ACB_PWNOTREQ) {
+		if (lp_null_passwords(auth_context->lp_ctx)) {
+			DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", 
+				 user_info->mapped.account_name));
+			return NT_STATUS_OK;
+		} else {
+			DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", 
+				 user_info->mapped.account_name));
+			return NT_STATUS_LOGON_FAILURE;
+		}		
+	}
+
+	switch (user_info->password_state) {
+	case AUTH_PASSWORD_PLAIN: 
+	{
+		const struct auth_usersupplied_info *user_info_temp;	
+		status = encrypt_user_info(mem_ctx, auth_context, 
+					   AUTH_PASSWORD_HASH, 
+					   user_info, &user_info_temp);
+		if (!NT_STATUS_IS_OK(status)) {
+			DEBUG(1, ("Failed to convert plaintext password to password HASH: %s\n", nt_errstr(status)));
+			return status;
+		}
+		user_info = user_info_temp;
+
+		/*fall through*/
+	}
+	case AUTH_PASSWORD_HASH:
+		*lm_sess_key = data_blob(NULL, 0);
+		*user_sess_key = data_blob(NULL, 0);
+		status = hash_password_check(mem_ctx, 
+					     auth_context->lp_ctx,
+					     user_info->password.hash.lanman,
+					     user_info->password.hash.nt,
+					     user_info->mapped.account_name,
+					     lm_pwd, nt_pwd);
+		NT_STATUS_NOT_OK_RETURN(status);
+		break;
+		
+	case AUTH_PASSWORD_RESPONSE:
+		status = ntlm_password_check(mem_ctx, 
+					     auth_context->lp_ctx,
+					     user_info->logon_parameters, 
+					     &auth_context->challenge.data, 
+					     &user_info->password.response.lanman, 
+					     &user_info->password.response.nt,
+					     user_info->mapped.account_name,
+					     user_info->client.account_name, 
+					     user_info->client.domain_name, 
+					     lm_pwd, nt_pwd,
+					     user_sess_key, lm_sess_key);
+		NT_STATUS_NOT_OK_RETURN(status);
+		break;
+	}
+
+	if (user_sess_key && user_sess_key->data) {
+		talloc_steal(auth_context, user_sess_key->data);
+	}
+	if (lm_sess_key && lm_sess_key->data) {
+		talloc_steal(auth_context, lm_sess_key->data);
+	}
+
+	return NT_STATUS_OK;
+}
+
+
+
+static NTSTATUS authsam_authenticate(struct auth_context *auth_context, 
+				     TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx, 
+				     struct ldb_message **msgs,
+				     struct ldb_message **msgs_domain_ref,
+				     const struct auth_usersupplied_info *user_info, 
+				     DATA_BLOB *user_sess_key, DATA_BLOB *lm_sess_key) 
+{
+	struct samr_Password *lm_pwd, *nt_pwd;
+	NTSTATUS nt_status;
+	struct ldb_dn *domain_dn = samdb_result_dn(sam_ctx, mem_ctx, msgs_domain_ref[0], "nCName", NULL);
+
+	uint16_t acct_flags = samdb_result_acct_flags(sam_ctx, mem_ctx, msgs[0], domain_dn);
+	
+	/* Quit if the account was locked out. */
+	if (acct_flags & ACB_AUTOLOCK) {
+		DEBUG(3,("check_sam_security: Account for user %s was locked out.\n", 
+			 user_info->mapped.account_name));
+		return NT_STATUS_ACCOUNT_LOCKED_OUT;
+	}
+
+	/* You can only do an interactive login to normal accounts */
+	if (user_info->flags & USER_INFO_INTERACTIVE_LOGON) {
+		if (!(acct_flags & ACB_NORMAL)) {
+			return NT_STATUS_NO_SUCH_USER;
+		}
+	}
+
+	nt_status = samdb_result_passwords(mem_ctx, msgs[0], &lm_pwd, &nt_pwd);
+	NT_STATUS_NOT_OK_RETURN(nt_status);
+
+	nt_status = authsam_password_ok(auth_context, mem_ctx, 
+					acct_flags, lm_pwd, nt_pwd,
+					user_info, user_sess_key, lm_sess_key);
+	NT_STATUS_NOT_OK_RETURN(nt_status);
+
+	nt_status = authsam_account_ok(mem_ctx, sam_ctx, 
+				       user_info->logon_parameters,
+				       msgs[0],
+				       msgs_domain_ref[0],
+				       user_info->workstation_name,
+				       user_info->mapped.account_name);
+
+	return nt_status;
+}
+
+
+
+static NTSTATUS authsam_check_password_internals(struct auth_method_context *ctx,
+						 TALLOC_CTX *mem_ctx,
+						 const char *domain,
+						 const struct auth_usersupplied_info *user_info, 
+						 struct auth_serversupplied_info **server_info)
+{
+	NTSTATUS nt_status;
+	const char *account_name = user_info->mapped.account_name;
+	struct ldb_message **msgs;
+	struct ldb_message **domain_ref_msgs;
+	struct ldb_context *sam_ctx;
+	DATA_BLOB user_sess_key, lm_sess_key;
+	TALLOC_CTX *tmp_ctx;
+
+	if (!account_name || !*account_name) {
+		/* 'not for me' */
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	tmp_ctx = talloc_new(mem_ctx);
+	if (!tmp_ctx) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	sam_ctx = samdb_connect(tmp_ctx, ctx->auth_ctx->event_ctx, ctx->auth_ctx->lp_ctx, system_session(mem_ctx, ctx->auth_ctx->lp_ctx));
+	if (sam_ctx == NULL) {
+		talloc_free(tmp_ctx);
+		return NT_STATUS_INVALID_SYSTEM_SERVICE;
+	}
+
+	nt_status = authsam_search_account(tmp_ctx, sam_ctx, account_name, domain, &msgs, &domain_ref_msgs);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		talloc_free(tmp_ctx);
+		return nt_status;
+	}
+
+	nt_status = authsam_authenticate(ctx->auth_ctx, tmp_ctx, sam_ctx, msgs, domain_ref_msgs, user_info,
+					 &user_sess_key, &lm_sess_key);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		talloc_free(tmp_ctx);
+		return nt_status;
+	}
+
+	nt_status = authsam_make_server_info(tmp_ctx, sam_ctx, lp_netbios_name(ctx->auth_ctx->lp_ctx), 
+					     msgs[0], domain_ref_msgs[0],
+					     user_sess_key, lm_sess_key,
+					     server_info);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		talloc_free(tmp_ctx);
+		return nt_status;
+	}
+
+	talloc_steal(mem_ctx, *server_info);
+	talloc_free(tmp_ctx);
+
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS authsam_ignoredomain_want_check(struct auth_method_context *ctx,
+						TALLOC_CTX *mem_ctx,
+						const struct auth_usersupplied_info *user_info)
+{
+	if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS authsam_ignoredomain_check_password(struct auth_method_context *ctx,
+						    TALLOC_CTX *mem_ctx,
+						    const struct auth_usersupplied_info *user_info, 
+						    struct auth_serversupplied_info **server_info)
+{
+	return authsam_check_password_internals(ctx, mem_ctx, NULL, user_info, server_info);
+}
+
+/****************************************************************************
+Check SAM security (above) but with a few extra checks.
+****************************************************************************/
+static NTSTATUS authsam_want_check(struct auth_method_context *ctx,
+				   TALLOC_CTX *mem_ctx,
+				   const struct auth_usersupplied_info *user_info)
+{
+	bool is_local_name, is_my_domain;
+
+	if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	is_local_name = lp_is_myname(ctx->auth_ctx->lp_ctx, 
+				  user_info->mapped.domain_name);
+	is_my_domain  = lp_is_mydomain(ctx->auth_ctx->lp_ctx, 
+				       user_info->mapped.domain_name); 
+
+	/* check whether or not we service this domain/workgroup name */
+	switch (lp_server_role(ctx->auth_ctx->lp_ctx)) {
+		case ROLE_STANDALONE:
+			return NT_STATUS_OK;
+
+		case ROLE_DOMAIN_MEMBER:
+			if (!is_local_name) {
+				DEBUG(6,("authsam_check_password: %s is not one of my local names (DOMAIN_MEMBER)\n",
+					user_info->mapped.domain_name));
+				return NT_STATUS_NOT_IMPLEMENTED;
+			}
+			return NT_STATUS_OK;
+
+		case ROLE_DOMAIN_CONTROLLER:
+			if (!is_local_name && !is_my_domain) {
+				DEBUG(6,("authsam_check_password: %s is not one of my local names or domain name (DC)\n",
+					user_info->mapped.domain_name));
+				return NT_STATUS_NOT_IMPLEMENTED;
+			}
+			return NT_STATUS_OK;
+	}
+
+	DEBUG(6,("authsam_check_password: lp_server_role() has an undefined value\n"));
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+/****************************************************************************
+Check SAM security (above) but with a few extra checks.
+****************************************************************************/
+static NTSTATUS authsam_check_password(struct auth_method_context *ctx,
+				       TALLOC_CTX *mem_ctx,
+				       const struct auth_usersupplied_info *user_info, 
+				       struct auth_serversupplied_info **server_info)
+{
+	const char *domain;
+
+	/* check whether or not we service this domain/workgroup name */
+	switch (lp_server_role(ctx->auth_ctx->lp_ctx)) {
+		case ROLE_STANDALONE:
+		case ROLE_DOMAIN_MEMBER:
+			domain = lp_netbios_name(ctx->auth_ctx->lp_ctx);
+			break;
+
+		case ROLE_DOMAIN_CONTROLLER:
+			domain = lp_workgroup(ctx->auth_ctx->lp_ctx);
+			break;
+
+		default:
+			return NT_STATUS_NO_SUCH_USER;
+	}
+
+	return authsam_check_password_internals(ctx, mem_ctx, domain, user_info, server_info);
+}
+
+static const struct auth_operations sam_ignoredomain_ops = {
+	.name		= "sam_ignoredomain",
+	.get_challenge	= auth_get_challenge_not_implemented,
+	.want_check	= authsam_ignoredomain_want_check,
+	.check_password	= authsam_ignoredomain_check_password
+};
+
+static const struct auth_operations sam_ops = {
+	.name		= "sam",
+	.get_challenge	= auth_get_challenge_not_implemented,
+	.want_check	= authsam_want_check,
+	.check_password	= authsam_check_password
+};
+
+_PUBLIC_ NTSTATUS auth_sam_init(void)
+{
+	NTSTATUS ret;
+
+	ret = auth_register(&sam_ops);
+	if (!NT_STATUS_IS_OK(ret)) {
+		DEBUG(0,("Failed to register 'sam' auth backend!\n"));
+		return ret;
+	}
+
+	ret = auth_register(&sam_ignoredomain_ops);
+	if (!NT_STATUS_IS_OK(ret)) {
+		DEBUG(0,("Failed to register 'sam_ignoredomain' auth backend!\n"));
+		return ret;
+	}
+
+	return ret;
+}