r3190: When we don't have a PAC, do a lookup in the local ldb instead.

This required reworking the auth_sam code, so that it would export the
'name -> server_info' functionality.  It's a bit ugly from a modular
point of view, but it's what we have to do...

Fix up some of the code to better use the new talloc()

Andrew Bartlett
(This used to be commit 18e08b4497ebabc2f31210254e145458b7c6a198)

1 files changed, 245 insertions, 118 deletions

diff --git a/source4/auth/auth_sam.c b/source4/auth/auth_sam.c
index 4e797acd36..bae13bd996 100644
--- a/source4/auth/auth_sam.c
+++ b/source4/auth/auth_sam.c
@@ -144,6 +144,7 @@ static NTSTATUS sam_account_ok(TALLOC_CTX *mem_ctx,
 			
 			if(strequal(tok, user_info->wksta_name.str)) {
 				invalid_ws = False;
+
 				break;
 			}
 		}
@@ -171,38 +172,23 @@ static NTSTATUS sam_account_ok(TALLOC_CTX *mem_ctx,
 }
 
 /****************************************************************************
-check if a username/password is OK assuming the password is a 24 byte
-SMB hash supplied in the user_info structure
-return an NT_STATUS constant.
+ Look for the specified user in the sam, return ldb result structures
 ****************************************************************************/
 
-static NTSTATUS check_sam_security(const struct auth_context *auth_context,
-				   void *my_private_data, 
-				   TALLOC_CTX *mem_ctx,
-				   const struct auth_usersupplied_info *user_info, 
-				   struct auth_serversupplied_info **server_info)
+static NTSTATUS sam_search_user(const char *username, const char *domain, 
+				TALLOC_CTX *mem_ctx, void *sam_ctx, 
+				struct ldb_message ***ret_msgs, 
+				struct ldb_message ***ret_msgs_domain)
 {
 	struct ldb_message **msgs;
 	struct ldb_message **msgs_domain;
-	void *sam_ctx;
-	char *username = user_info->internal_username.str;
-	uint16_t acct_flags;
-	const char *workstation_list;
-	NTTIME acct_expiry;
-	NTTIME must_change_time;
-	NTTIME last_set_time;
 
 	uint_t ret;
 	uint_t ret_domain;
 
-	const char *domain_dn;
+	const char *domain_dn = NULL;
 	const char *domain_sid;
 
-	NTSTATUS nt_status;
-	DATA_BLOB user_sess_key = data_blob(NULL, 0);
-	DATA_BLOB lm_sess_key = data_blob(NULL, 0);
-	struct samr_Password *lm_pwd, *nt_pwd;
-
 	const char *attrs[] = {"unicodePwd", "lmPwdHash", "ntPwdHash", 
 			       "userAccountControl",
 			       "pwdLastSet",
@@ -226,18 +212,31 @@ static NTSTATUS check_sam_security(const struct auth_context *auth_context,
 			       NULL,
 	};
 
-	const char *domain_attrs[] =  {"name"};
+	const char *domain_attrs[] =  {"name", "objectSid"};
+
+	if (domain) {
+		/* find the domain's DN */
+		ret_domain = samdb_search(sam_ctx, mem_ctx, NULL, &msgs_domain, domain_attrs,
+					  "(&(|(realm=%s)(name=%s))(objectclass=domain))", 
+					  domain, domain);
+		
+		if (ret_domain == 0) {
+			DEBUG(3,("check_sam_security: Couldn't find domain [%s] in passdb file.\n", 
+				 domain));
+			return NT_STATUS_NO_SUCH_USER;
+		}
+		
+		if (ret_domain > 1) {
+			DEBUG(0,("Found %d records matching domain [%s]\n", 
+				 ret_domain, domain));
+			return NT_STATUS_INTERNAL_DB_CORRUPTION;
+		}
+
+		domain_dn = msgs_domain[0]->dn;
 
-	if (!user_info || !auth_context) {
-		return NT_STATUS_UNSUCCESSFUL;
-	}
-	
-	sam_ctx = samdb_connect(mem_ctx);
-	if (sam_ctx == NULL) {
-		return NT_STATUS_INVALID_SYSTEM_SERVICE;
 	}
 	/* pull the user attributes */
-	ret = samdb_search(sam_ctx, mem_ctx, NULL, &msgs, attrs,
+	ret = samdb_search(sam_ctx, mem_ctx, domain_dn, &msgs, attrs,
 			   "(&(sAMAccountName=%s)(objectclass=user))", 
 			   username);
 
@@ -252,30 +251,56 @@ static NTSTATUS check_sam_security(const struct auth_context *auth_context,
 		return NT_STATUS_INTERNAL_DB_CORRUPTION;
 	}
 	
-	domain_sid = samdb_result_sid_prefix(mem_ctx, msgs[0], "objectSid");
-	if (!domain_sid) {
-		return NT_STATUS_INTERNAL_DB_CORRUPTION;
-	}
+	if (!domain) {
+		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_domain = samdb_search(sam_ctx, mem_ctx, NULL, &msgs_domain, domain_attrs,
-			   "(&(objectSid=%s)(objectclass=domain))", 
-			   domain_sid);
+		/* find the domain's DN */
+		ret_domain = samdb_search(sam_ctx, mem_ctx, NULL, &msgs_domain, domain_attrs,
+					  "(&(objectSid=%s)(objectclass=domain))", 
+					  domain_sid);
+		
+		if (ret_domain == 0) {
+			DEBUG(3,("check_sam_security: Couldn't find domain [%s] in passdb file.\n", 
+				 domain_sid));
+			return NT_STATUS_NO_SUCH_USER;
+		}
+		
+		if (ret_domain > 1) {
+			DEBUG(0,("Found %d records matching domain [%s]\n", 
+				 ret_domain, domain_sid));
+			return NT_STATUS_INTERNAL_DB_CORRUPTION;
+		}
 
-	if (ret_domain == 0) {
-		DEBUG(3,("check_sam_security: Couldn't find domain [%s] in passdb file.\n", 
-			 domain_sid));
-		return NT_STATUS_NO_SUCH_USER;
+		domain_dn = msgs_domain[0]->dn;
 	}
+	*ret_msgs = msgs;
+	*ret_msgs_domain = msgs_domain;
+	
+	return NT_STATUS_OK;
+}
+
+NTSTATUS sam_check_password(const struct auth_context *auth_context, 
+			    const char *username,
+			    TALLOC_CTX *mem_ctx, void *sam_ctx, 
+			    struct ldb_message **msgs,
+			    const char *domain_dn,
+			    const struct auth_usersupplied_info *user_info, 
+			    DATA_BLOB *user_sess_key, DATA_BLOB *lm_sess_key) 
+{
+
+	uint16_t acct_flags;
+	const char *workstation_list;
+	NTTIME acct_expiry;
+	NTTIME must_change_time;
+	NTTIME last_set_time;
+	struct samr_Password *lm_pwd, *nt_pwd;
+
+	NTSTATUS nt_status;
 
-	if (ret_domain > 1) {
-		DEBUG(0,("Found %d records matching domain [%s]\n", 
-			 ret_domain, domain_sid));
-		return NT_STATUS_INTERNAL_DB_CORRUPTION;
-	}
 
-	domain_dn = msgs_domain[0]->dn;
-	
 	acct_flags = samdb_result_acct_flags(msgs[0], "sAMAcctFlags");
 	
 	/* Quit if the account was locked out. */
@@ -293,7 +318,7 @@ static NTSTATUS check_sam_security(const struct auth_context *auth_context,
 	nt_status = sam_password_ok(auth_context, mem_ctx, 
 				    username, acct_flags, 
 				    lm_pwd, nt_pwd,
-				    user_info, &user_sess_key, &lm_sess_key);
+				    user_info, user_sess_key, lm_sess_key);
 	
 	if (!NT_STATUS_IS_OK(nt_status)) {
 		return nt_status;
@@ -314,68 +339,72 @@ static NTSTATUS check_sam_security(const struct auth_context *auth_context,
 				   workstation_list,
 				   user_info);
 
-	if (!NT_STATUS_IS_OK(nt_status)) {
-		return nt_status;
-	}
+	return nt_status;
+}
+
+NTSTATUS sam_make_server_info(TALLOC_CTX *mem_ctx, void *sam_ctx, 
+			      struct ldb_message **msgs, struct ldb_message **msgs_domain, 
+			      struct auth_serversupplied_info **server_info) 
+{
+
+	struct ldb_message **group_msgs;
+	int group_ret;
+	const char *group_attrs[3] = { "sAMAccountType", "objectSid", NULL }; 
+	/* find list of sids */
+	struct dom_sid **groupSIDs = NULL;
+	struct dom_sid *user_sid;
+	struct dom_sid *primary_group_sid;
+	const char *sidstr;
+	int i;
+	uint_t rid;
+	
+	NTSTATUS nt_status;
 
-	if (!NT_STATUS_IS_OK(nt_status = make_server_info(auth_context, server_info, username))) {		
+	if (!NT_STATUS_IS_OK(nt_status = make_server_info(mem_ctx, server_info, 
+							  samdb_result_string(msgs[0], "sAMAccountName", "")))) {		
 		DEBUG(0,("check_sam_security: make_server_info_sam() failed with '%s'\n", nt_errstr(nt_status)));
 		return nt_status;
 	}
-
-	{
-		struct ldb_message **group_msgs;
-		char *dn = msgs[0]->dn;
-		int group_ret;
-		const char *group_attrs[3] = { "sAMAccountType", "objectSid", NULL }; 
-		/* find list of sids */
-		struct dom_sid **groupSIDs = NULL;
-		struct dom_sid *user_sid;
-		struct dom_sid *primary_group_sid;
-		const char *sidstr;
-		int i;
-		uint_t rid;
-
-		group_ret = samdb_search(sam_ctx,
-					 mem_ctx, NULL, &group_msgs, group_attrs,
-					 "(&(member=%s)(sAMAccountType=*))", 
-					 dn);
-		if (group_ret == -1) {
-			return NT_STATUS_INTERNAL_DB_CORRUPTION;
-		}
-		
-		if (group_ret > 0 && 
-		    !(groupSIDs = talloc_array_p(*server_info, struct dom_sid *, group_ret))) {
-			talloc_free(*server_info);
-			return NT_STATUS_NO_MEMORY;
-		}
-
-		/* Need to unroll some nested groups, but not aliases */
-		for (i = 0; i < group_ret; i++) {
-			sidstr = ldb_msg_find_string(group_msgs[i], "objectSid", NULL);
-			groupSIDs[i] = dom_sid_parse_talloc(*server_info, sidstr);
-		}
-		
-		sidstr = ldb_msg_find_string(msgs[0], "objectSid", NULL);
-		user_sid = dom_sid_parse_talloc(*server_info, sidstr);
-		primary_group_sid = dom_sid_parse_talloc(*server_info, sidstr);
-		rid = samdb_result_uint(msgs[0], "primaryGroupID", ~0);
-		if (rid == ~0) {
-			if (group_ret > 0) {
-				primary_group_sid = groupSIDs[0];
-			} else {
-				primary_group_sid = NULL;
-			}
+	
+	group_ret = samdb_search(sam_ctx,
+				 mem_ctx, NULL, &group_msgs, group_attrs,
+				 "(&(member=%s)(sAMAccountType=*))", 
+				 msgs[0]->dn);
+	if (group_ret == -1) {
+		return NT_STATUS_INTERNAL_DB_CORRUPTION;
+	}
+	
+	if (group_ret > 0 && 
+	    !(groupSIDs = talloc_array_p(*server_info, struct dom_sid *, group_ret))) {
+		talloc_free(*server_info);
+		return NT_STATUS_NO_MEMORY;
+	}
+	
+	/* Need to unroll some nested groups, but not aliases */
+	for (i = 0; i < group_ret; i++) {
+		sidstr = ldb_msg_find_string(group_msgs[i], "objectSid", NULL);
+		groupSIDs[i] = dom_sid_parse_talloc(*server_info, sidstr);
+	}
+	
+	sidstr = ldb_msg_find_string(msgs[0], "objectSid", NULL);
+	user_sid = dom_sid_parse_talloc(*server_info, sidstr);
+	primary_group_sid = dom_sid_parse_talloc(*server_info, sidstr);
+	rid = samdb_result_uint(msgs[0], "primaryGroupID", ~0);
+	if (rid == ~0) {
+		if (group_ret > 0) {
+			primary_group_sid = groupSIDs[0];
 		} else {
-			primary_group_sid->sub_auths[primary_group_sid->num_auths-1] = rid;
+			primary_group_sid = NULL;
 		}
-
-		(*server_info)->user_sid = user_sid;
-		(*server_info)->primary_group_sid = primary_group_sid;
-		
-		(*server_info)->n_domain_groups = group_ret;
-		(*server_info)->domain_groups = groupSIDs;
+	} else {
+		primary_group_sid->sub_auths[primary_group_sid->num_auths-1] = rid;
 	}
+	
+	(*server_info)->user_sid = user_sid;
+	(*server_info)->primary_group_sid = primary_group_sid;
+	
+	(*server_info)->n_domain_groups = group_ret;
+	(*server_info)->domain_groups = groupSIDs;
 
 	(*server_info)->account_name 
 		= talloc_strdup(*server_info, 
@@ -409,10 +438,10 @@ static NTSTATUS check_sam_security(const struct auth_context *auth_context,
 	(*server_info)->last_password_change = samdb_result_nttime(msgs[0], "pwdLastSet", 0);
 	(*server_info)->allow_password_change
 		= samdb_result_allow_password_change(sam_ctx, mem_ctx, 
-						     domain_dn, msgs[0], "pwdLastSet");
+						     msgs_domain[0]->dn, msgs[0], "pwdLastSet");
 	(*server_info)->force_password_change
 		= samdb_result_force_password_change(sam_ctx, mem_ctx, 
-						     domain_dn, msgs[0], "pwdLastSet");
+						     msgs_domain[0]->dn, msgs[0], "pwdLastSet");
 
 	(*server_info)->logon_count = samdb_result_uint(msgs[0], "logonCount", 0);
 	(*server_info)->bad_password_count = samdb_result_uint(msgs[0], "badPwdCount", 0);
@@ -421,9 +450,6 @@ static NTSTATUS check_sam_security(const struct auth_context *auth_context,
 
 	(*server_info)->guest = False;
 
-	(*server_info)->user_session_key = user_sess_key;
-	(*server_info)->lm_session_key = lm_sess_key;
-
 	if (!(*server_info)->account_name 
 	    || !(*server_info)->full_name 
 	    || !(*server_info)->logon_script
@@ -437,6 +463,85 @@ static NTSTATUS check_sam_security(const struct auth_context *auth_context,
 	return nt_status;
 }
 
+NTSTATUS sam_get_server_info(const char *username, const char *domain, TALLOC_CTX *mem_ctx,
+			     struct auth_serversupplied_info **server_info)
+{
+	NTSTATUS nt_status;
+
+	struct ldb_message **msgs;
+	struct ldb_message **domain_msgs;
+	void *sam_ctx;
+
+	sam_ctx = samdb_connect(mem_ctx);
+	if (sam_ctx == NULL) {
+		return NT_STATUS_INVALID_SYSTEM_SERVICE;
+	}
+
+	nt_status = sam_search_user(username, domain, mem_ctx, sam_ctx, &msgs, &domain_msgs);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		return nt_status;
+	}
+
+	nt_status = sam_make_server_info(mem_ctx, sam_ctx, msgs, domain_msgs, server_info);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		return nt_status;
+	}
+
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS check_sam_security_internals(const struct auth_context *auth_context,
+					     const char *domain,
+					     TALLOC_CTX *mem_ctx,
+					     const struct auth_usersupplied_info *user_info, 
+					     struct auth_serversupplied_info **server_info)
+{
+	NTSTATUS nt_status;
+
+	const char *username = user_info->internal_username.str;
+	struct ldb_message **msgs;
+	struct ldb_message **domain_msgs;
+	void *sam_ctx;
+	DATA_BLOB user_sess_key, lm_sess_key;
+
+	sam_ctx = samdb_connect(mem_ctx);
+	if (sam_ctx == NULL) {
+		return NT_STATUS_INVALID_SYSTEM_SERVICE;
+	}
+
+	nt_status = sam_search_user(username, domain, mem_ctx, sam_ctx, &msgs, &domain_msgs);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		return nt_status;
+	}
+
+	nt_status = sam_check_password(auth_context, username, mem_ctx, sam_ctx, msgs, domain_msgs[0]->dn, user_info,
+				       &user_sess_key, &lm_sess_key);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		return nt_status;
+	}
+	
+	nt_status = sam_make_server_info(mem_ctx, sam_ctx, msgs, domain_msgs, server_info);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		return nt_status;
+	}
+
+	talloc_reference(auth_context, *server_info);
+
+	(*server_info)->user_session_key = user_sess_key;
+	(*server_info)->lm_session_key = lm_sess_key;
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS check_sam_security(const struct auth_context *auth_context,
+				   void *my_private_data, 
+				   TALLOC_CTX *mem_ctx,
+				   const struct auth_usersupplied_info *user_info, 
+				   struct auth_serversupplied_info **server_info)
+{
+	return check_sam_security_internals(auth_context, NULL,
+					    mem_ctx, user_info, server_info);
+}
+
 /* module initialisation */
 static NTSTATUS auth_init_sam_ignoredomain(struct auth_context *auth_context, 
 					   const char *param, 
@@ -462,22 +567,44 @@ static NTSTATUS check_samstrict_security(const struct auth_context *auth_context
 					 const struct auth_usersupplied_info *user_info, 
 					 struct auth_serversupplied_info **server_info)
 {
+	const char *domain;
+	BOOL is_local_name, is_my_domain;
 
 	if (!user_info || !auth_context) {
 		return NT_STATUS_LOGON_FAILURE;
 	}
 
-	/* If we are a domain member, we must not 
-	   attempt to check the password locally,
-	   unless it is one of our aliases. */
+	is_local_name = is_myname(user_info->domain.str);
+	is_my_domain  = strequal(user_info->domain.str, lp_workgroup());
+
+	/* check whether or not we service this domain/workgroup name */
 	
-	if (!is_myname(user_info->domain.str)) {
-		DEBUG(7,("The requested user domain is not the local server name. [%s]\\[%s]\n",
-			user_info->domain.str,user_info->internal_username.str));
-		return NT_STATUS_NO_SUCH_USER;
+	switch ( lp_server_role() ) {
+		case ROLE_STANDALONE:
+		case ROLE_DOMAIN_MEMBER:
+			if ( !is_local_name ) {
+				DEBUG(6,("check_samstrict_security: %s is not one of my local names (%s)\n",
+					user_info->domain.str, (lp_server_role() == ROLE_DOMAIN_MEMBER 
+					? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") ));
+				return NT_STATUS_NOT_IMPLEMENTED;
+			}
+			domain = lp_netbios_name();
+			break;
+		case ROLE_DOMAIN_PDC:
+		case ROLE_DOMAIN_BDC:
+			if ( !is_local_name && !is_my_domain ) {
+				DEBUG(6,("check_samstrict_security: %s is not one of my local names or domain name (DC)\n",
+					user_info->domain.str));
+				return NT_STATUS_NOT_IMPLEMENTED;
+			}
+			domain = lp_workgroup();
+			break;
+		default: /* name is ok */
+			domain = user_info->domain.str;
+			break;
 	}
 	
-	return check_sam_security(auth_context, my_private_data, mem_ctx, user_info, server_info);
+	return check_sam_security_internals(auth_context, domain, mem_ctx, user_info, server_info);
 }
 
 /* module initialisation */