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, 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);
+}