mirror of
https://github.com/samba-team/samba.git
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50310ad75d
Reviewed-by: Jelmer
201 lines
6.1 KiB
C
201 lines
6.1 KiB
C
/*
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Unix SMB/CIFS implementation.
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Authenticate against Samba4's auth subsystem
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Copyright (C) Volker Lendecke 2008
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Copyright (C) Andrew Bartlett 2010
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "source3/include/auth.h"
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#include "source4/auth/auth.h"
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#include "auth/auth_sam_reply.h"
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#include "param/param.h"
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#include "source4/lib/events/events.h"
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#include "source4/lib/messaging/messaging.h"
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#include "auth/gensec/gensec.h"
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#include "source4/auth/credentials/credentials.h"
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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_AUTH
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static NTSTATUS check_samba4_security(const struct auth_context *auth_context,
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void *my_private_data,
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TALLOC_CTX *mem_ctx,
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const struct auth_usersupplied_info *user_info,
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struct auth_serversupplied_info **server_info)
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{
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TALLOC_CTX *frame = talloc_stackframe();
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struct netr_SamInfo3 *info3 = NULL;
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NTSTATUS nt_status;
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struct auth_user_info_dc *user_info_dc;
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struct auth4_context *auth4_context;
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struct loadparm_context *lp_ctx;
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lp_ctx = loadparm_init_s3(frame, loadparm_s3_context());
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if (lp_ctx == NULL) {
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DEBUG(10, ("loadparm_init_s3 failed\n"));
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talloc_free(frame);
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return NT_STATUS_INVALID_SERVER_STATE;
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}
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/* We create a private tevent context here to avoid nested loops in
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* the s3 one, as that may not be expected */
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nt_status = auth_context_create(mem_ctx,
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s4_event_context_init(frame), NULL,
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lp_ctx,
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&auth4_context);
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NT_STATUS_NOT_OK_RETURN(nt_status);
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nt_status = auth_context_set_challenge(auth4_context, auth_context->challenge.data, "auth_samba4");
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NT_STATUS_NOT_OK_RETURN_AND_FREE(nt_status, auth4_context);
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nt_status = auth_check_password(auth4_context, auth4_context, user_info, &user_info_dc);
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NT_STATUS_NOT_OK_RETURN_AND_FREE(nt_status, auth4_context);
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nt_status = auth_convert_user_info_dc_saminfo3(mem_ctx,
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user_info_dc,
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&info3);
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if (NT_STATUS_IS_OK(nt_status)) {
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/* We need the strings from the server_info to be valid as long as the info3 is around */
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talloc_steal(info3, user_info_dc);
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}
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talloc_free(auth4_context);
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if (!NT_STATUS_IS_OK(nt_status)) {
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goto done;
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}
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nt_status = make_server_info_info3(mem_ctx, user_info->client.account_name,
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user_info->mapped.domain_name, server_info,
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info3);
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if (!NT_STATUS_IS_OK(nt_status)) {
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DEBUG(10, ("make_server_info_info3 failed: %s\n",
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nt_errstr(nt_status)));
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TALLOC_FREE(frame);
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return nt_status;
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}
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nt_status = NT_STATUS_OK;
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done:
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TALLOC_FREE(frame);
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return nt_status;
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}
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/* Hook to allow GENSEC to handle blob-based authentication
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* mechanisms, without directly linking the mechansim code */
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static NTSTATUS prepare_gensec(TALLOC_CTX *mem_ctx,
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struct gensec_security **gensec_context)
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{
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NTSTATUS status;
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struct loadparm_context *lp_ctx;
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struct tevent_context *event_ctx;
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TALLOC_CTX *frame = talloc_stackframe();
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struct gensec_security *gensec_ctx;
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struct imessaging_context *msg_ctx;
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struct cli_credentials *server_credentials;
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lp_ctx = loadparm_init_s3(frame, loadparm_s3_context());
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if (lp_ctx == NULL) {
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DEBUG(1, ("loadparm_init_s3 failed\n"));
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TALLOC_FREE(frame);
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return NT_STATUS_INVALID_SERVER_STATE;
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}
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event_ctx = s4_event_context_init(mem_ctx);
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if (event_ctx == NULL) {
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DEBUG(1, ("s4_event_context_init failed\n"));
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TALLOC_FREE(frame);
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return NT_STATUS_INVALID_SERVER_STATE;
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}
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msg_ctx = imessaging_client_init(frame,
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lpcfg_imessaging_path(frame, lp_ctx),
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event_ctx);
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if (msg_ctx == NULL) {
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DEBUG(1, ("imessaging_init failed\n"));
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TALLOC_FREE(frame);
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return NT_STATUS_INVALID_SERVER_STATE;
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}
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server_credentials
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= cli_credentials_init(frame);
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if (!server_credentials) {
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DEBUG(1, ("Failed to init server credentials"));
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TALLOC_FREE(frame);
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return NT_STATUS_INVALID_SERVER_STATE;
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}
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cli_credentials_set_conf(server_credentials, lp_ctx);
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status = cli_credentials_set_machine_account(server_credentials, lp_ctx);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(10, ("Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(status)));
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talloc_free(server_credentials);
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server_credentials = NULL;
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}
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status = samba_server_gensec_start(mem_ctx,
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event_ctx, msg_ctx,
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lp_ctx, server_credentials, "cifs",
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&gensec_ctx);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(1, ("Failed to start GENSEC server code: %s\n", nt_errstr(status)));
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TALLOC_FREE(frame);
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return status;
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}
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talloc_reparent(frame, gensec_ctx, msg_ctx);
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talloc_reparent(frame, gensec_ctx, event_ctx);
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talloc_reparent(frame, gensec_ctx, lp_ctx);
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talloc_reparent(frame, gensec_ctx, server_credentials);
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gensec_want_feature(gensec_ctx, GENSEC_FEATURE_SESSION_KEY);
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gensec_want_feature(gensec_ctx, GENSEC_FEATURE_UNIX_TOKEN);
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*gensec_context = gensec_ctx;
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TALLOC_FREE(frame);
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return status;
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}
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/* module initialisation */
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static NTSTATUS auth_init_samba4(struct auth_context *auth_context,
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const char *param,
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auth_methods **auth_method)
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{
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struct auth_methods *result;
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gensec_init();
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result = talloc_zero(auth_context, struct auth_methods);
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if (result == NULL) {
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return NT_STATUS_NO_MEMORY;
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}
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result->name = "samba4";
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result->auth = check_samba4_security;
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result->prepare_gensec = prepare_gensec;
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result->gensec_start_mech_by_oid = gensec_start_mech_by_oid;
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result->gensec_start_mech_by_authtype = gensec_start_mech_by_authtype;
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*auth_method = result;
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return NT_STATUS_OK;
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}
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NTSTATUS auth_samba4_init(void)
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{
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smb_register_auth(AUTH_INTERFACE_VERSION, "samba4",
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auth_init_samba4);
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return NT_STATUS_OK;
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}
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