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/*
Unix SMB/CIFS implementation.
Authentication utility functions
Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Andrew Bartlett 2001
Copyright (C) Jeremy Allison 2000-2001
Copyright (C) Rafal Szczesniak 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 "libcli/auth/libcli_auth.h"
#include "param/param.h"
#include "auth/ntlm/auth_proto.h"
#include "librpc/gen_ndr/drsuapi.h"
#include "dsdb/samdb/samdb.h"
#include "lib/crypto/gnutls_helpers.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
/****************************************************************************
Create an auth_usersupplied_data structure after appropriate mapping.
****************************************************************************/
NTSTATUS encrypt_user_info(TALLOC_CTX *mem_ctx, struct auth4_context *auth_context,
enum auth_password_state to_state,
const struct auth_usersupplied_info *user_info_in,
const struct auth_usersupplied_info **user_info_encrypted)
{
int rc;
NTSTATUS nt_status;
struct auth_usersupplied_info *user_info_temp;
switch (to_state) {
case AUTH_PASSWORD_RESPONSE:
switch (user_info_in->password_state) {
case AUTH_PASSWORD_PLAIN:
{
const struct auth_usersupplied_info *user_info_temp2;
nt_status = encrypt_user_info(mem_ctx, auth_context,
AUTH_PASSWORD_HASH,
user_info_in, &user_info_temp2);
if (!NT_STATUS_IS_OK(nt_status)) {
return nt_status;
}
user_info_in = user_info_temp2;
FALL_THROUGH;
}
case AUTH_PASSWORD_HASH:
{
uint8_t chal[8];
DATA_BLOB chall_blob;
user_info_temp = talloc_zero(mem_ctx, struct auth_usersupplied_info);
if (!user_info_temp) {
return NT_STATUS_NO_MEMORY;
}
if (!talloc_reference(user_info_temp, user_info_in)) {
return NT_STATUS_NO_MEMORY;
}
*user_info_temp = *user_info_in;
user_info_temp->password_state = to_state;
nt_status = auth_get_challenge(auth_context, chal);
if (!NT_STATUS_IS_OK(nt_status)) {
return nt_status;
}
chall_blob = data_blob_talloc(mem_ctx, chal, 8);
if (lpcfg_client_ntlmv2_auth(auth_context->lp_ctx)) {
DATA_BLOB names_blob = NTLMv2_generate_names_blob(mem_ctx, lpcfg_netbios_name(auth_context->lp_ctx), lpcfg_workgroup(auth_context->lp_ctx));
DATA_BLOB lmv2_response, ntlmv2_response, lmv2_session_key, ntlmv2_session_key;
if (!SMBNTLMv2encrypt_hash(user_info_temp,
user_info_in->client.account_name,
user_info_in->client.domain_name,
user_info_in->password.hash.nt->hash,
&chall_blob,
NULL, /* server_timestamp */
&names_blob,
&lmv2_response, &ntlmv2_response,
&lmv2_session_key, &ntlmv2_session_key)) {
data_blob_free(&names_blob);
return NT_STATUS_NO_MEMORY;
}
data_blob_free(&names_blob);
user_info_temp->password.response.lanman = lmv2_response;
user_info_temp->password.response.nt = ntlmv2_response;
data_blob_free(&lmv2_session_key);
data_blob_free(&ntlmv2_session_key);
} else {
DATA_BLOB blob = data_blob_talloc(mem_ctx, NULL, 24);
rc = SMBOWFencrypt(user_info_in->password.hash.nt->hash, chal, blob.data);
if (rc != 0) {
return gnutls_error_to_ntstatus(rc, NT_STATUS_ACCESS_DISABLED_BY_POLICY_OTHER);
}
user_info_temp->password.response.nt = blob;
if (lpcfg_client_lanman_auth(auth_context->lp_ctx) && user_info_in->password.hash.lanman) {
DATA_BLOB lm_blob = data_blob_talloc(mem_ctx, NULL, 24);
rc = SMBOWFencrypt(user_info_in->password.hash.lanman->hash, chal, blob.data);
if (rc != 0) {
return gnutls_error_to_ntstatus(rc, NT_STATUS_ACCESS_DISABLED_BY_POLICY_OTHER);
}
user_info_temp->password.response.lanman = lm_blob;
} else {
/* if not sending the LM password, send the NT password twice */
user_info_temp->password.response.lanman = user_info_temp->password.response.nt;
}
}
user_info_in = user_info_temp;
FALL_THROUGH;
}
case AUTH_PASSWORD_RESPONSE:
*user_info_encrypted = user_info_in;
}
break;
case AUTH_PASSWORD_HASH:
{
switch (user_info_in->password_state) {
case AUTH_PASSWORD_PLAIN:
{
struct samr_Password lanman;
struct samr_Password nt;
user_info_temp = talloc_zero(mem_ctx, struct auth_usersupplied_info);
if (!user_info_temp) {
return NT_STATUS_NO_MEMORY;
}
if (!talloc_reference(user_info_temp, user_info_in)) {
return NT_STATUS_NO_MEMORY;
}
*user_info_temp = *user_info_in;
user_info_temp->password_state = to_state;
if (E_deshash(user_info_in->password.plaintext, lanman.hash)) {
user_info_temp->password.hash.lanman = talloc(user_info_temp,
struct samr_Password);
*user_info_temp->password.hash.lanman = lanman;
} else {
user_info_temp->password.hash.lanman = NULL;
}
E_md4hash(user_info_in->password.plaintext, nt.hash);
user_info_temp->password.hash.nt = talloc(user_info_temp,
struct samr_Password);
*user_info_temp->password.hash.nt = nt;
user_info_in = user_info_temp;
FALL_THROUGH;
}
case AUTH_PASSWORD_HASH:
*user_info_encrypted = user_info_in;
break;
default:
return NT_STATUS_INVALID_PARAMETER;
break;
}
break;
}
default:
return NT_STATUS_INVALID_PARAMETER;
}
return NT_STATUS_OK;
}
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