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-rw-r--r--source4/auth/ntlm/auth_sam.c449
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;
+}