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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 17:20:00 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 17:20:00 +0000
commit8daa83a594a2e98f39d764422bfbdbc62c9efd44 (patch)
tree4099e8021376c7d8c05bdf8503093d80e9c7bad0 /source3/auth/auth_winbind.c
parentInitial commit. (diff)
downloadsamba-8daa83a594a2e98f39d764422bfbdbc62c9efd44.tar.xz
samba-8daa83a594a2e98f39d764422bfbdbc62c9efd44.zip
Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'source3/auth/auth_winbind.c')
-rw-r--r--source3/auth/auth_winbind.c202
1 files changed, 202 insertions, 0 deletions
diff --git a/source3/auth/auth_winbind.c b/source3/auth/auth_winbind.c
new file mode 100644
index 0000000..46db4f2
--- /dev/null
+++ b/source3/auth/auth_winbind.c
@@ -0,0 +1,202 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ Winbind authentication mechanism
+
+ Copyright (C) Tim Potter 2000
+ Copyright (C) Andrew Bartlett 2001 - 2002
+
+ 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 "passdb.h"
+#include "nsswitch/libwbclient/wbclient.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
+
+/* Authenticate a user with a challenge/response */
+
+static NTSTATUS check_winbind_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)
+{
+ NTSTATUS nt_status;
+ wbcErr wbc_status;
+ struct wbcAuthUserParams params;
+ struct wbcAuthUserInfo *info = NULL;
+ struct wbcAuthErrorInfo *err = NULL;
+
+ ZERO_STRUCT(params);
+
+ if (!user_info) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ DEBUG(10, ("Check auth for: [%s]\n", user_info->mapped.account_name));
+
+ if (!auth_context) {
+ DEBUG(3,("Password for user %s cannot be checked because we have no auth_info to get the challenge from.\n",
+ user_info->mapped.account_name));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (strequal(user_info->mapped.domain_name, get_global_sam_name())) {
+ DEBUG(3,("check_winbind_security: Not using winbind, requested domain [%s] was for this SAM.\n",
+ user_info->mapped.domain_name));
+ return NT_STATUS_NOT_IMPLEMENTED;
+ }
+
+ /* Send off request */
+ params.account_name = user_info->client.account_name;
+ /*
+ * We need to send the domain name from the client to the DC. With
+ * NTLMv2 the domain name is part of the hashed second challenge,
+ * if we change the domain name, the DC will fail to verify the
+ * challenge cause we changed the domain name, this is like a
+ * man in the middle attack.
+ */
+ params.domain_name = user_info->client.domain_name;
+ params.workstation_name = user_info->workstation_name;
+
+ params.flags = 0;
+ params.parameter_control= user_info->logon_parameters;
+
+ params.level = WBC_AUTH_USER_LEVEL_RESPONSE;
+
+ memcpy(params.password.response.challenge,
+ auth_context->challenge.data,
+ sizeof(params.password.response.challenge));
+
+ if (user_info->password.response.nt.length != 0) {
+ params.password.response.nt_length =
+ user_info->password.response.nt.length;
+ params.password.response.nt_data =
+ user_info->password.response.nt.data;
+ }
+ if (user_info->password.response.lanman.length != 0) {
+ params.password.response.lm_length =
+ user_info->password.response.lanman.length;
+ params.password.response.lm_data =
+ user_info->password.response.lanman.data;
+ }
+
+ /* we are contacting the privileged pipe */
+ become_root();
+ wbc_status = wbcAuthenticateUserEx(&params, &info, &err);
+ unbecome_root();
+
+ if (!WBC_ERROR_IS_OK(wbc_status)) {
+ DEBUG(10,("check_winbind_security: wbcAuthenticateUserEx failed: %s\n",
+ wbcErrorString(wbc_status)));
+ }
+
+ if (wbc_status == WBC_ERR_NO_MEMORY) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ if (wbc_status == WBC_ERR_WINBIND_NOT_AVAILABLE) {
+ struct pdb_trusted_domain **domains = NULL;
+ uint32_t num_domains = 0;
+ NTSTATUS status;
+
+ if (lp_server_role() == ROLE_DOMAIN_MEMBER) {
+ status = NT_STATUS_NO_LOGON_SERVERS;
+ DBG_ERR("winbindd not running - "
+ "but required as domain member: %s\n",
+ nt_errstr(status));
+ return status;
+ }
+
+ status = pdb_enum_trusted_domains(talloc_tos(), &num_domains, &domains);
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_ERR("pdb_enum_trusted_domains() failed - %s\n",
+ nt_errstr(status));
+ return status;
+ }
+ TALLOC_FREE(domains);
+
+ if (num_domains == 0) {
+ DBG_DEBUG("winbindd not running - ignoring without "
+ "trusted domains\n");
+ return NT_STATUS_NOT_IMPLEMENTED;
+ }
+
+ status = NT_STATUS_NO_LOGON_SERVERS;
+ DBG_ERR("winbindd not running - "
+ "but required as DC with trusts: %s\n",
+ nt_errstr(status));
+ return status;
+ }
+
+ if (wbc_status == WBC_ERR_AUTH_ERROR) {
+ nt_status = NT_STATUS(err->nt_status);
+
+ if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) &&
+ (err->authoritative == 0)) {
+ /*
+ * Trigger a fallback to local SAM
+ */
+ nt_status = NT_STATUS_NOT_IMPLEMENTED;
+ }
+
+ wbcFreeMemory(err);
+ return nt_status;
+ }
+
+ if (!WBC_ERROR_IS_OK(wbc_status)) {
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ nt_status = make_server_info_wbcAuthUserInfo(mem_ctx,
+ user_info->client.account_name,
+ user_info->mapped.domain_name,
+ info, server_info);
+ wbcFreeMemory(info);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ return nt_status;
+ }
+
+ (*server_info)->nss_token |= user_info->was_mapped;
+
+ return nt_status;
+}
+
+/* module initialisation */
+static NTSTATUS auth_init_winbind(
+ struct auth_context *auth_context,
+ const char *param,
+ struct auth_methods **auth_method)
+{
+ struct auth_methods *result;
+
+ result = talloc_zero(auth_context, struct auth_methods);
+ if (result == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ result->name = "winbind";
+ result->auth = check_winbind_security;
+
+ *auth_method = result;
+ return NT_STATUS_OK;
+}
+
+NTSTATUS auth_winbind_init(TALLOC_CTX *mem_ctx)
+{
+ return smb_register_auth(AUTH_INTERFACE_VERSION, "winbind", auth_init_winbind);
+}