1 files changed, 282 insertions, 0 deletions

diff --git a/source4/auth/ntlm/auth_winbind.c b/source4/auth/ntlm/auth_winbind.c
new file mode 100644
index 0000000000..ac63b242e4
--- /dev/null
+++ b/source4/auth/ntlm/auth_winbind.c
@@ -0,0 +1,282 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   Winbind authentication mechnism
+
+   Copyright (C) Tim Potter 2000
+   Copyright (C) Andrew Bartlett 2001 - 2002
+   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 "auth/auth.h"
+#include "auth/ntlm/auth_proto.h"
+#include "auth/session_proto.h"
+#include "nsswitch/winbind_client.h"
+#include "librpc/gen_ndr/ndr_netlogon.h"
+#include "librpc/gen_ndr/ndr_winbind.h"
+#include "lib/messaging/irpc.h"
+#include "param/param.h"
+
+static NTSTATUS get_info3_from_ndr(TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *iconv_convenience, struct winbindd_response *response, struct netr_SamInfo3 *info3)
+{
+	size_t len = response->length - sizeof(struct winbindd_response);
+	if (len > 4) {
+		enum ndr_err_code ndr_err;
+		DATA_BLOB blob;
+		blob.length = len - 4;
+		blob.data = (uint8_t *)(((char *)response->extra_data.data) + 4);
+
+		ndr_err = ndr_pull_struct_blob(&blob, mem_ctx, 
+			       iconv_convenience, info3,
+			      (ndr_pull_flags_fn_t)ndr_pull_netr_SamInfo3);
+		if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+			return ndr_map_error2ntstatus(ndr_err);
+		}
+
+		return NT_STATUS_OK;
+	} else {
+		DEBUG(2, ("get_info3_from_ndr: No info3 struct found!\n"));
+		return NT_STATUS_UNSUCCESSFUL;
+	}
+}
+
+static NTSTATUS winbind_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;
+	}
+
+	/* TODO: maybe limit the user scope to remote users only */
+	return NT_STATUS_OK;
+}
+
+/*
+ Authenticate a user with a challenge/response
+ using the samba3 winbind protocol
+*/
+static NTSTATUS winbind_check_password_samba3(struct auth_method_context *ctx,
+					      TALLOC_CTX *mem_ctx,
+					      const struct auth_usersupplied_info *user_info, 
+					      struct auth_serversupplied_info **server_info)
+{
+	struct winbindd_request request;
+	struct winbindd_response response;
+        NSS_STATUS result;
+	NTSTATUS nt_status;
+	struct netr_SamInfo3 info3;		
+
+	/* Send off request */
+	const struct auth_usersupplied_info *user_info_temp;	
+	nt_status = encrypt_user_info(mem_ctx, ctx->auth_ctx, 
+				      AUTH_PASSWORD_RESPONSE, 
+				      user_info, &user_info_temp);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		return nt_status;
+	}
+	user_info = user_info_temp;
+
+	ZERO_STRUCT(request);
+	ZERO_STRUCT(response);
+	request.flags = WBFLAG_PAM_INFO3_NDR;
+
+	request.data.auth_crap.logon_parameters = user_info->logon_parameters;
+
+	safe_strcpy(request.data.auth_crap.user,
+		       user_info->client.account_name, sizeof(fstring));
+	safe_strcpy(request.data.auth_crap.domain,
+		       user_info->client.domain_name, sizeof(fstring));
+	safe_strcpy(request.data.auth_crap.workstation,
+		       user_info->workstation_name, sizeof(fstring));
+
+	memcpy(request.data.auth_crap.chal, ctx->auth_ctx->challenge.data.data, sizeof(request.data.auth_crap.chal));
+
+	request.data.auth_crap.lm_resp_len = MIN(user_info->password.response.lanman.length,
+						 sizeof(request.data.auth_crap.lm_resp));
+	request.data.auth_crap.nt_resp_len = MIN(user_info->password.response.nt.length, 
+						 sizeof(request.data.auth_crap.nt_resp));
+
+	memcpy(request.data.auth_crap.lm_resp, user_info->password.response.lanman.data,
+	       request.data.auth_crap.lm_resp_len);
+	memcpy(request.data.auth_crap.nt_resp, user_info->password.response.nt.data,
+	       request.data.auth_crap.nt_resp_len);
+
+	result = winbindd_request_response(WINBINDD_PAM_AUTH_CRAP, &request, &response);
+
+	nt_status = NT_STATUS(response.data.auth.nt_status);
+	NT_STATUS_NOT_OK_RETURN(nt_status);
+
+	if (result == NSS_STATUS_SUCCESS && response.extra_data.data) {
+		union netr_Validation validation;
+
+		nt_status = get_info3_from_ndr(mem_ctx, lp_iconv_convenience(ctx->auth_ctx->lp_ctx), &response, &info3);
+		SAFE_FREE(response.extra_data.data);
+		NT_STATUS_NOT_OK_RETURN(nt_status); 
+
+		validation.sam3 = &info3;
+		nt_status = make_server_info_netlogon_validation(mem_ctx, 
+								 user_info->client.account_name, 
+								 3, &validation,
+								 server_info);
+		return nt_status;
+	} else if (result == NSS_STATUS_SUCCESS && !response.extra_data.data) {
+		DEBUG(0, ("Winbindd authenticated the user [%s]\\[%s], "
+			  "but did not include the required info3 reply!\n", 
+			  user_info->client.domain_name, user_info->client.account_name));
+		return NT_STATUS_INSUFFICIENT_LOGON_INFO;
+	} else if (NT_STATUS_IS_OK(nt_status)) {
+		DEBUG(1, ("Winbindd authentication for [%s]\\[%s] failed, "
+			  "but no error code is available!\n", 
+			  user_info->client.domain_name, user_info->client.account_name));
+		return NT_STATUS_NO_LOGON_SERVERS;
+	}
+
+        return nt_status;
+}
+
+struct winbind_check_password_state {
+	struct winbind_SamLogon req;
+};
+
+/*
+ Authenticate a user with a challenge/response
+ using IRPC to the winbind task
+*/
+static NTSTATUS winbind_check_password(struct auth_method_context *ctx,
+				       TALLOC_CTX *mem_ctx,
+				       const struct auth_usersupplied_info *user_info, 
+				       struct auth_serversupplied_info **server_info)
+{
+	NTSTATUS status;
+	struct server_id *winbind_servers;
+	struct winbind_check_password_state *s;
+	const struct auth_usersupplied_info *user_info_new;
+	struct netr_IdentityInfo *identity_info;
+
+	s = talloc(mem_ctx, struct winbind_check_password_state);
+	NT_STATUS_HAVE_NO_MEMORY(s);
+
+	winbind_servers = irpc_servers_byname(ctx->auth_ctx->msg_ctx, s, "winbind_server");
+	if ((winbind_servers == NULL) || (winbind_servers[0].id == 0)) {
+		DEBUG(0, ("Winbind authentication for [%s]\\[%s] failed, " 
+			  "no winbind_server running!\n",
+			  user_info->client.domain_name, user_info->client.account_name));
+		return NT_STATUS_NO_LOGON_SERVERS;
+	}
+
+	if (user_info->flags & USER_INFO_INTERACTIVE_LOGON) {
+		struct netr_PasswordInfo *password_info;
+
+		status = encrypt_user_info(s, ctx->auth_ctx, AUTH_PASSWORD_HASH,
+					   user_info, &user_info_new);
+		NT_STATUS_NOT_OK_RETURN(status);
+		user_info = user_info_new;
+
+		password_info = talloc(s, struct netr_PasswordInfo);
+		NT_STATUS_HAVE_NO_MEMORY(password_info);
+
+		password_info->lmpassword = *user_info->password.hash.lanman;
+		password_info->ntpassword = *user_info->password.hash.nt;
+
+		identity_info = &password_info->identity_info;
+		s->req.in.logon_level	= 1;
+		s->req.in.logon.password= password_info;
+	} else {
+		struct netr_NetworkInfo *network_info;
+		const uint8_t *challenge;
+
+		status = encrypt_user_info(s, ctx->auth_ctx, AUTH_PASSWORD_RESPONSE,
+					   user_info, &user_info_new);
+		NT_STATUS_NOT_OK_RETURN(status);
+		user_info = user_info_new;
+
+		network_info = talloc(s, struct netr_NetworkInfo);
+		NT_STATUS_HAVE_NO_MEMORY(network_info);
+
+		status = auth_get_challenge(ctx->auth_ctx, &challenge);
+		NT_STATUS_NOT_OK_RETURN(status);
+
+		memcpy(network_info->challenge, challenge, sizeof(network_info->challenge));
+
+		network_info->nt.length = user_info->password.response.nt.length;
+		network_info->nt.data	= user_info->password.response.nt.data;
+
+		network_info->lm.length = user_info->password.response.lanman.length;
+		network_info->lm.data	= user_info->password.response.lanman.data;
+
+		identity_info = &network_info->identity_info;
+		s->req.in.logon_level	= 2;
+		s->req.in.logon.network = network_info;
+	}
+
+	identity_info->domain_name.string	= user_info->client.domain_name;
+	identity_info->parameter_control	= user_info->logon_parameters; /* see MSV1_0_* */
+	identity_info->logon_id_low		= 0;
+	identity_info->logon_id_high		= 0;
+	identity_info->account_name.string	= user_info->client.account_name;
+	identity_info->workstation.string	= user_info->workstation_name;
+
+	s->req.in.validation_level	= 3;
+
+	status = IRPC_CALL(ctx->auth_ctx->msg_ctx, winbind_servers[0],
+			   winbind, WINBIND_SAMLOGON,
+			   &s->req, s);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	status = make_server_info_netlogon_validation(mem_ctx,
+						      user_info->client.account_name,
+						      s->req.in.validation_level,
+						      &s->req.out.validation,
+						      server_info);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	return NT_STATUS_OK;
+}
+
+static const struct auth_operations winbind_samba3_ops = {
+	.name		= "winbind_samba3",
+	.get_challenge	= auth_get_challenge_not_implemented,
+	.want_check	= winbind_want_check,
+	.check_password	= winbind_check_password_samba3
+};
+
+static const struct auth_operations winbind_ops = {
+	.name		= "winbind",
+	.get_challenge	= auth_get_challenge_not_implemented,
+	.want_check	= winbind_want_check,
+	.check_password	= winbind_check_password
+};
+
+_PUBLIC_ NTSTATUS auth_winbind_init(void)
+{
+	NTSTATUS ret;
+
+	ret = auth_register(&winbind_samba3_ops);
+	if (!NT_STATUS_IS_OK(ret)) {
+		DEBUG(0,("Failed to register 'winbind_samba3' auth backend!\n"));
+		return ret;
+	}
+
+	ret = auth_register(&winbind_ops);
+	if (!NT_STATUS_IS_OK(ret)) {
+		DEBUG(0,("Failed to register 'winbind' auth backend!\n"));
+		return ret;
+	}
+
+	return NT_STATUS_OK;
+}