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/*
Unix SMB/CIFS implementation.
Authenticate a user
Copyright (C) Volker Lendecke 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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "libcli/composite/composite.h"
#include "winbind/wb_async_helpers.h"
#include "winbind/wb_server.h"
#include "smbd/service_stream.h"
#include "libcli/auth/credentials.h"
struct pam_auth_crap_state {
struct composite_context *ctx;
struct event_context *event_ctx;
const char *domain_name;
const char *user_name;
const char *workstation;
DATA_BLOB chal, nt_resp, lm_resp;
struct creds_CredentialState *creds_state;
struct netr_Authenticator auth, auth2;
struct netr_NetworkInfo ninfo;
struct netr_LogonSamLogon r;
struct netr_UserSessionKey user_session_key;
struct netr_LMSessionKey lm_key;
DATA_BLOB info3;
};
static struct composite_context *crap_samlogon_send_req(struct wbsrv_domain *domain,
void *p);
static NTSTATUS crap_samlogon_recv_req(struct composite_context *ctx, void *p);
struct composite_context *wb_cmd_pam_auth_crap_send(struct wbsrv_call *call,
const char *domain,
const char *user,
const char *workstation,
DATA_BLOB chal,
DATA_BLOB nt_resp,
DATA_BLOB lm_resp)
{
struct pam_auth_crap_state *state;
struct wbsrv_service *service = call->wbconn->listen_socket->service;
state = talloc(NULL, struct pam_auth_crap_state);
if (state == NULL) goto failed;
state->event_ctx = call->event_ctx;
state->domain_name = talloc_strdup(state, domain);
if (state->domain_name == NULL) goto failed;
state->user_name = talloc_strdup(state, user);
if (state->user_name == NULL) goto failed;
state->workstation = talloc_strdup(state, workstation);
if (state->workstation == NULL) goto failed;
state->chal = data_blob_talloc(state, chal.data, chal.length);
if ((chal.data != NULL) && (state->chal.data == NULL)) goto failed;
state->nt_resp = data_blob_talloc(state, nt_resp.data, nt_resp.length);
if ((nt_resp.data != NULL) &&
(state->nt_resp.data == NULL)) goto failed;
state->lm_resp = data_blob_talloc(state, lm_resp.data, lm_resp.length);
if ((lm_resp.data != NULL) &&
(state->lm_resp.data == NULL)) goto failed;
state->ctx = wb_domain_request_send(state, service,
service->primary_sid,
crap_samlogon_send_req,
crap_samlogon_recv_req,
state);
if (state->ctx == NULL) goto failed;
state->ctx->private_data = state;
return state->ctx;
failed:
talloc_free(state);
return NULL;
}
static struct composite_context *crap_samlogon_send_req(struct wbsrv_domain *domain,
void *p)
{
struct pam_auth_crap_state *state =
talloc_get_type(p, struct pam_auth_crap_state);
state->creds_state =
cli_credentials_get_netlogon_creds(domain->schannel_creds);
creds_client_authenticator(state->creds_state, &state->auth);
state->ninfo.identity_info.account_name.string = state->user_name;
state->ninfo.identity_info.domain_name.string = state->domain_name;
state->ninfo.identity_info.parameter_control = 0;
state->ninfo.identity_info.logon_id_low = 0;
state->ninfo.identity_info.logon_id_high = 0;
state->ninfo.identity_info.workstation.string = state->workstation;
SMB_ASSERT(state->chal.length == sizeof(state->ninfo.challenge));
memcpy(state->ninfo.challenge, state->chal.data,
sizeof(state->ninfo.challenge));
state->ninfo.nt.length = state->nt_resp.length;
state->ninfo.nt.data = state->nt_resp.data;
state->ninfo.lm.length = state->lm_resp.length;
state->ninfo.lm.data = state->lm_resp.data;
state->r.in.server_name = talloc_asprintf(
state, "\\\\%s", dcerpc_server_name(domain->netlogon_pipe));
if (state->r.in.server_name == NULL) return NULL;
state->r.in.workstation =
cli_credentials_get_workstation(domain->schannel_creds);
state->r.in.credential = &state->auth;
state->r.in.return_authenticator = &state->auth2;
state->r.in.logon_level = 2;
state->r.in.validation_level = 3;
state->r.in.logon.network = &state->ninfo;
state->r.out.return_authenticator = NULL;
return composite_netr_LogonSamLogon_send(domain->netlogon_pipe,
state, &state->r);
}
static NTSTATUS crap_samlogon_recv_req(struct composite_context *ctx,
void *p)
{
struct pam_auth_crap_state *state =
talloc_get_type(p, struct pam_auth_crap_state);
struct netr_SamBaseInfo *base;
DATA_BLOB tmp_blob;
NTSTATUS status;
status = composite_netr_LogonSamLogon_recv(ctx);
if (!NT_STATUS_IS_OK(status)) return status;
status = state->r.out.result;
if (!NT_STATUS_IS_OK(status)) return status;
if ((state->r.out.return_authenticator == NULL) ||
(!creds_client_check(state->creds_state,
&state->r.out.return_authenticator->cred))) {
DEBUG(0, ("Credentials check failed!\n"));
return NT_STATUS_ACCESS_DENIED;
}
creds_decrypt_samlogon(state->creds_state,
state->r.in.validation_level,
&state->r.out.validation);
status = ndr_push_struct_blob(
&tmp_blob, state,
state->r.out.validation.sam3,
(ndr_push_flags_fn_t)ndr_push_netr_SamInfo3);
NT_STATUS_NOT_OK_RETURN(status);
state->info3 = data_blob_talloc(state, NULL, tmp_blob.length+4);
NT_STATUS_HAVE_NO_MEMORY(state->info3.data);
SIVAL(state->info3.data, 0, 1);
memcpy(state->info3.data+4, tmp_blob.data, tmp_blob.length);
base = NULL;
switch(state->r.in.validation_level) {
case 2:
base = &state->r.out.validation.sam2->base;
break;
case 3:
base = &state->r.out.validation.sam3->base;
break;
case 6:
base = &state->r.out.validation.sam6->base;
break;
}
if (base == NULL) {
return NT_STATUS_INTERNAL_ERROR;
}
state->user_session_key = base->key;
state->lm_key = base->LMSessKey;
return NT_STATUS_OK;
}
NTSTATUS wb_cmd_pam_auth_crap_recv(struct composite_context *c,
TALLOC_CTX *mem_ctx,
DATA_BLOB *info3,
struct netr_UserSessionKey *user_session_key,
struct netr_LMSessionKey *lm_key)
{
NTSTATUS status = composite_wait(c);
if (NT_STATUS_IS_OK(status)) {
struct pam_auth_crap_state *state =
talloc_get_type(c->private_data,
struct pam_auth_crap_state);
info3->length = state->info3.length;
info3->data = talloc_steal(mem_ctx, state->info3.data);
*user_session_key = state->user_session_key;
*lm_key = state->lm_key;
}
talloc_free(c);
return status;
}
NTSTATUS wb_cmd_pam_auth_crap(struct wbsrv_call *call,
const char *domain, const char *user,
const char *workstation,
DATA_BLOB chal, DATA_BLOB nt_resp,
DATA_BLOB lm_resp, TALLOC_CTX *mem_ctx,
DATA_BLOB *info3,
struct netr_UserSessionKey *user_session_key,
struct netr_LMSessionKey *lm_key)
{
struct composite_context *c =
wb_cmd_pam_auth_crap_send(call, domain, user, workstation,
chal, nt_resp, lm_resp);
return wb_cmd_pam_auth_crap_recv(c, mem_ctx, info3, user_session_key,
lm_key);
}
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