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samba-mirror/source4/auth/auth_util.c
Jelmer Vernooij 710ea94988 r15297: Move create_security_token() to samdb as it requires SAMDB (and the rest of LIBSECURITY doesn't)
Make the ldb password_hash module only depend on some keys manipulation code, not full heimdal
Some other dependency fixes
(This used to be commit 5b3ab728ed)
2007-10-10 14:05:04 -05:00

663 lines
22 KiB
C

/*
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 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 "auth/auth.h"
#include "libcli/security/security.h"
#include "libcli/auth/libcli_auth.h"
#include "dsdb/samdb/samdb.h"
/* this default function can be used by mostly all backends
* which don't want to set a challenge
*/
NTSTATUS auth_get_challenge_not_implemented(struct auth_method_context *ctx, TALLOC_CTX *mem_ctx, DATA_BLOB *challenge)
{
/* we don't want to set a challenge */
return NT_STATUS_NOT_IMPLEMENTED;
}
/****************************************************************************
Create an auth_usersupplied_data structure after appropriate mapping.
****************************************************************************/
NTSTATUS map_user_info(TALLOC_CTX *mem_ctx,
const struct auth_usersupplied_info *user_info,
struct auth_usersupplied_info **user_info_mapped)
{
const char *domain;
char *account_name;
char *d;
DEBUG(5,("map_user_info: Mapping user [%s]\\[%s] from workstation [%s]\n",
user_info->client.domain_name, user_info->client.account_name, user_info->workstation_name));
account_name = talloc_strdup(mem_ctx, user_info->client.account_name);
if (!account_name) {
return NT_STATUS_NO_MEMORY;
}
/* don't allow "" as a domain, fixes a Win9X bug
where it doens't supply a domain for logon script
'net use' commands. */
/* Split user@realm names into user and realm components. This is TODO to fix with proper userprincipalname support */
if (user_info->client.domain_name && *user_info->client.domain_name) {
domain = user_info->client.domain_name;
} else if (strchr_m(user_info->client.account_name, '@')) {
d = strchr_m(account_name, '@');
if (!d) {
return NT_STATUS_INTERNAL_ERROR;
}
d[0] = '\0';
d++;
domain = d;
} else {
domain = lp_workgroup();
}
*user_info_mapped = talloc(mem_ctx, struct auth_usersupplied_info);
if (!*user_info_mapped) {
return NT_STATUS_NO_MEMORY;
}
talloc_reference(*user_info_mapped, user_info);
**user_info_mapped = *user_info;
(*user_info_mapped)->mapped_state = True;
(*user_info_mapped)->mapped.domain_name = talloc_strdup(*user_info_mapped, domain);
(*user_info_mapped)->mapped.account_name = talloc_strdup(*user_info_mapped, account_name);
talloc_free(account_name);
if (!(*user_info_mapped)->mapped.domain_name
|| !(*user_info_mapped)->mapped.account_name) {
return NT_STATUS_NO_MEMORY;
}
return NT_STATUS_OK;
}
/****************************************************************************
Create an auth_usersupplied_data structure after appropriate mapping.
****************************************************************************/
NTSTATUS encrypt_user_info(TALLOC_CTX *mem_ctx, struct auth_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)
{
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:
{
const uint8_t *challenge;
DATA_BLOB chall_blob;
user_info_temp = talloc(mem_ctx, struct auth_usersupplied_info);
if (!user_info_temp) {
return NT_STATUS_NO_MEMORY;
}
talloc_reference(user_info_temp, user_info_in);
*user_info_temp = *user_info_in;
user_info_temp->mapped_state = to_state;
nt_status = auth_get_challenge(auth_context, &challenge);
if (!NT_STATUS_IS_OK(nt_status)) {
return nt_status;
}
chall_blob = data_blob_talloc(mem_ctx, challenge, 8);
if (lp_client_ntlmv2_auth()) {
DATA_BLOB names_blob = NTLMv2_generate_names_blob(mem_ctx, lp_netbios_name(), lp_workgroup());
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,
&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);
SMBOWFencrypt(user_info_in->password.hash.nt->hash, challenge, blob.data);
user_info_temp->password.response.nt = blob;
if (lp_client_lanman_auth() && user_info_in->password.hash.lanman) {
DATA_BLOB lm_blob = data_blob_talloc(mem_ctx, NULL, 24);
SMBOWFencrypt(user_info_in->password.hash.lanman->hash, challenge, blob.data);
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(mem_ctx, struct auth_usersupplied_info);
if (!user_info_temp) {
return NT_STATUS_NO_MEMORY;
}
talloc_reference(user_info_temp, user_info_in);
*user_info_temp = *user_info_in;
user_info_temp->mapped_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;
}
/***************************************************************************
Make a server_info struct from the info3 returned by a domain logon
***************************************************************************/
NTSTATUS make_server_info_netlogon_validation(TALLOC_CTX *mem_ctx,
const char *account_name,
uint16_t validation_level,
union netr_Validation *validation,
struct auth_serversupplied_info **_server_info)
{
struct auth_serversupplied_info *server_info;
struct netr_SamBaseInfo *base = NULL;
int i;
switch (validation_level) {
case 2:
if (!validation || !validation->sam2) {
return NT_STATUS_INVALID_PARAMETER;
}
base = &validation->sam2->base;
break;
case 3:
if (!validation || !validation->sam3) {
return NT_STATUS_INVALID_PARAMETER;
}
base = &validation->sam3->base;
break;
case 6:
if (!validation || !validation->sam6) {
return NT_STATUS_INVALID_PARAMETER;
}
base = &validation->sam6->base;
break;
default:
return NT_STATUS_INVALID_LEVEL;
}
server_info = talloc(mem_ctx, struct auth_serversupplied_info);
NT_STATUS_HAVE_NO_MEMORY(server_info);
/*
Here is where we should check the list of
trusted domains, and verify that the SID
matches.
*/
server_info->account_sid = dom_sid_add_rid(server_info, base->domain_sid, base->rid);
NT_STATUS_HAVE_NO_MEMORY(server_info->account_sid);
server_info->primary_group_sid = dom_sid_add_rid(server_info, base->domain_sid, base->primary_gid);
NT_STATUS_HAVE_NO_MEMORY(server_info->primary_group_sid);
server_info->n_domain_groups = base->groups.count;
if (base->groups.count) {
server_info->domain_groups = talloc_array(server_info, struct dom_sid*, base->groups.count);
NT_STATUS_HAVE_NO_MEMORY(server_info->domain_groups);
} else {
server_info->domain_groups = NULL;
}
for (i = 0; i < base->groups.count; i++) {
server_info->domain_groups[i] = dom_sid_add_rid(server_info, base->domain_sid, base->groups.rids[i].rid);
NT_STATUS_HAVE_NO_MEMORY(server_info->domain_groups[i]);
}
/* Copy 'other' sids. We need to do sid filtering here to
prevent possible elevation of privileges. See:
http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
*/
if (validation_level == 3) {
struct dom_sid **dgrps = server_info->domain_groups;
size_t sidcount = server_info->n_domain_groups + validation->sam3->sidcount;
size_t n_dgrps = server_info->n_domain_groups;
if (validation->sam3->sidcount > 0) {
dgrps = talloc_realloc(server_info, dgrps, struct dom_sid*, sidcount);
NT_STATUS_HAVE_NO_MEMORY(dgrps);
for (i = 0; i < validation->sam3->sidcount; i++) {
dgrps[n_dgrps + i] = talloc_reference(dgrps, validation->sam3->sids[i].sid);
}
}
server_info->n_domain_groups = sidcount;
server_info->domain_groups = dgrps;
/* Where are the 'global' sids?... */
}
if (base->account_name.string) {
server_info->account_name = talloc_reference(server_info, base->account_name.string);
} else {
server_info->account_name = talloc_strdup(server_info, account_name);
NT_STATUS_HAVE_NO_MEMORY(server_info->account_name);
}
server_info->domain_name = talloc_reference(server_info, base->domain.string);
server_info->full_name = talloc_reference(server_info, base->full_name.string);
server_info->logon_script = talloc_reference(server_info, base->logon_script.string);
server_info->profile_path = talloc_reference(server_info, base->profile_path.string);
server_info->home_directory = talloc_reference(server_info, base->home_directory.string);
server_info->home_drive = talloc_reference(server_info, base->home_drive.string);
server_info->logon_server = talloc_reference(server_info, base->logon_server.string);
server_info->last_logon = base->last_logon;
server_info->last_logoff = base->last_logoff;
server_info->acct_expiry = base->acct_expiry;
server_info->last_password_change = base->last_password_change;
server_info->allow_password_change = base->allow_password_change;
server_info->force_password_change = base->force_password_change;
server_info->logon_count = base->logon_count;
server_info->bad_password_count = base->bad_password_count;
server_info->acct_flags = base->acct_flags;
server_info->authenticated = True;
/* ensure we are never given NULL session keys */
if (all_zero(base->key.key, sizeof(base->key.key))) {
server_info->user_session_key = data_blob(NULL, 0);
} else {
server_info->user_session_key = data_blob_talloc(server_info, base->key.key, sizeof(base->key.key));
NT_STATUS_HAVE_NO_MEMORY(server_info->user_session_key.data);
}
if (all_zero(base->LMSessKey.key, sizeof(base->LMSessKey.key))) {
server_info->lm_session_key = data_blob(NULL, 0);
} else {
server_info->lm_session_key = data_blob_talloc(server_info, base->LMSessKey.key, sizeof(base->LMSessKey.key));
NT_STATUS_HAVE_NO_MEMORY(server_info->lm_session_key.data);
}
*_server_info = server_info;
return NT_STATUS_OK;
}
NTSTATUS auth_anonymous_server_info(TALLOC_CTX *mem_ctx, struct auth_serversupplied_info **_server_info)
{
struct auth_serversupplied_info *server_info;
server_info = talloc(mem_ctx, struct auth_serversupplied_info);
NT_STATUS_HAVE_NO_MEMORY(server_info);
server_info->account_sid = dom_sid_parse_talloc(server_info, SID_NT_ANONYMOUS);
NT_STATUS_HAVE_NO_MEMORY(server_info->account_sid);
/* is this correct? */
server_info->primary_group_sid = dom_sid_parse_talloc(server_info, SID_BUILTIN_GUESTS);
NT_STATUS_HAVE_NO_MEMORY(server_info->primary_group_sid);
server_info->n_domain_groups = 0;
server_info->domain_groups = NULL;
/* annoying, but the Anonymous really does have a session key,
and it is all zeros! */
server_info->user_session_key = data_blob_talloc(server_info, NULL, 16);
NT_STATUS_HAVE_NO_MEMORY(server_info->user_session_key.data);
server_info->lm_session_key = data_blob_talloc(server_info, NULL, 16);
NT_STATUS_HAVE_NO_MEMORY(server_info->lm_session_key.data);
data_blob_clear(&server_info->user_session_key);
data_blob_clear(&server_info->lm_session_key);
server_info->account_name = talloc_strdup(server_info, "ANONYMOUS LOGON");
NT_STATUS_HAVE_NO_MEMORY(server_info->account_name);
server_info->domain_name = talloc_strdup(server_info, "NT AUTHORITY");
NT_STATUS_HAVE_NO_MEMORY(server_info->domain_name);
server_info->full_name = talloc_strdup(server_info, "Anonymous Logon");
NT_STATUS_HAVE_NO_MEMORY(server_info->full_name);
server_info->logon_script = talloc_strdup(server_info, "");
NT_STATUS_HAVE_NO_MEMORY(server_info->logon_script);
server_info->profile_path = talloc_strdup(server_info, "");
NT_STATUS_HAVE_NO_MEMORY(server_info->profile_path);
server_info->home_directory = talloc_strdup(server_info, "");
NT_STATUS_HAVE_NO_MEMORY(server_info->home_directory);
server_info->home_drive = talloc_strdup(server_info, "");
NT_STATUS_HAVE_NO_MEMORY(server_info->home_drive);
server_info->logon_server = talloc_strdup(server_info, lp_netbios_name());
NT_STATUS_HAVE_NO_MEMORY(server_info->logon_server);
server_info->last_logon = 0;
server_info->last_logoff = 0;
server_info->acct_expiry = 0;
server_info->last_password_change = 0;
server_info->allow_password_change = 0;
server_info->force_password_change = 0;
server_info->logon_count = 0;
server_info->bad_password_count = 0;
server_info->acct_flags = ACB_NORMAL;
server_info->authenticated = False;
*_server_info = server_info;
return NT_STATUS_OK;
}
NTSTATUS auth_system_server_info(TALLOC_CTX *mem_ctx, struct auth_serversupplied_info **_server_info)
{
struct auth_serversupplied_info *server_info;
server_info = talloc(mem_ctx, struct auth_serversupplied_info);
NT_STATUS_HAVE_NO_MEMORY(server_info);
server_info->account_sid = dom_sid_parse_talloc(server_info, SID_NT_SYSTEM);
NT_STATUS_HAVE_NO_MEMORY(server_info->account_sid);
/* is this correct? */
server_info->primary_group_sid = dom_sid_parse_talloc(server_info, SID_BUILTIN_ADMINISTRATORS);
NT_STATUS_HAVE_NO_MEMORY(server_info->primary_group_sid);
server_info->n_domain_groups = 0;
server_info->domain_groups = NULL;
/* annoying, but the Anonymous really does have a session key,
and it is all zeros! */
server_info->user_session_key = data_blob_talloc(server_info, NULL, 16);
NT_STATUS_HAVE_NO_MEMORY(server_info->user_session_key.data);
server_info->lm_session_key = data_blob_talloc(server_info, NULL, 16);
NT_STATUS_HAVE_NO_MEMORY(server_info->lm_session_key.data);
data_blob_clear(&server_info->user_session_key);
data_blob_clear(&server_info->lm_session_key);
server_info->account_name = talloc_strdup(server_info, "SYSTEM");
NT_STATUS_HAVE_NO_MEMORY(server_info->account_name);
server_info->domain_name = talloc_strdup(server_info, "NT AUTHORITY");
NT_STATUS_HAVE_NO_MEMORY(server_info->domain_name);
server_info->full_name = talloc_strdup(server_info, "System");
NT_STATUS_HAVE_NO_MEMORY(server_info->full_name);
server_info->logon_script = talloc_strdup(server_info, "");
NT_STATUS_HAVE_NO_MEMORY(server_info->logon_script);
server_info->profile_path = talloc_strdup(server_info, "");
NT_STATUS_HAVE_NO_MEMORY(server_info->profile_path);
server_info->home_directory = talloc_strdup(server_info, "");
NT_STATUS_HAVE_NO_MEMORY(server_info->home_directory);
server_info->home_drive = talloc_strdup(server_info, "");
NT_STATUS_HAVE_NO_MEMORY(server_info->home_drive);
server_info->logon_server = talloc_strdup(server_info, lp_netbios_name());
NT_STATUS_HAVE_NO_MEMORY(server_info->logon_server);
server_info->last_logon = 0;
server_info->last_logoff = 0;
server_info->acct_expiry = 0;
server_info->last_password_change = 0;
server_info->allow_password_change = 0;
server_info->force_password_change = 0;
server_info->logon_count = 0;
server_info->bad_password_count = 0;
server_info->acct_flags = ACB_NORMAL;
server_info->authenticated = True;
*_server_info = server_info;
return NT_STATUS_OK;
}
NTSTATUS auth_generate_session_info(TALLOC_CTX *mem_ctx,
struct auth_serversupplied_info *server_info,
struct auth_session_info **_session_info)
{
struct auth_session_info *session_info;
NTSTATUS nt_status;
session_info = talloc(mem_ctx, struct auth_session_info);
NT_STATUS_HAVE_NO_MEMORY(session_info);
session_info->server_info = talloc_reference(session_info, server_info);
/* unless set otherwise, the session key is the user session
* key from the auth subsystem */
session_info->session_key = server_info->user_session_key;
nt_status = security_token_create(session_info,
server_info->account_sid,
server_info->primary_group_sid,
server_info->n_domain_groups,
server_info->domain_groups,
server_info->authenticated,
&session_info->security_token);
NT_STATUS_NOT_OK_RETURN(nt_status);
session_info->credentials = NULL;
*_session_info = session_info;
return NT_STATUS_OK;
}
NTSTATUS auth_anonymous_session_info(TALLOC_CTX *parent_ctx,
struct auth_session_info **_session_info)
{
NTSTATUS nt_status;
struct auth_serversupplied_info *server_info = NULL;
struct auth_session_info *session_info = NULL;
TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
nt_status = auth_anonymous_server_info(mem_ctx,
&server_info);
if (!NT_STATUS_IS_OK(nt_status)) {
talloc_free(mem_ctx);
return nt_status;
}
/* references the server_info into the session_info */
nt_status = auth_generate_session_info(parent_ctx, server_info, &session_info);
talloc_free(mem_ctx);
NT_STATUS_NOT_OK_RETURN(nt_status);
session_info->credentials = cli_credentials_init(session_info);
if (!session_info->credentials) {
return NT_STATUS_NO_MEMORY;
}
cli_credentials_set_conf(session_info->credentials);
cli_credentials_set_anonymous(session_info->credentials);
*_session_info = session_info;
return NT_STATUS_OK;
}
struct auth_session_info *anonymous_session(TALLOC_CTX *mem_ctx)
{
NTSTATUS nt_status;
struct auth_session_info *session_info = NULL;
nt_status = auth_anonymous_session_info(mem_ctx, &session_info);
if (!NT_STATUS_IS_OK(nt_status)) {
return NULL;
}
return session_info;
}
NTSTATUS auth_system_session_info(TALLOC_CTX *parent_ctx,
struct auth_session_info **_session_info)
{
NTSTATUS nt_status;
struct auth_serversupplied_info *server_info = NULL;
struct auth_session_info *session_info = NULL;
TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
nt_status = auth_system_server_info(mem_ctx,
&server_info);
if (!NT_STATUS_IS_OK(nt_status)) {
talloc_free(mem_ctx);
return nt_status;
}
/* references the server_info into the session_info */
nt_status = auth_generate_session_info(parent_ctx, server_info, &session_info);
talloc_free(mem_ctx);
NT_STATUS_NOT_OK_RETURN(nt_status);
session_info->credentials = cli_credentials_init(session_info);
if (!session_info->credentials) {
return NT_STATUS_NO_MEMORY;
}
cli_credentials_set_conf(session_info->credentials);
cli_credentials_set_machine_account_pending(session_info->credentials);
*_session_info = session_info;
return NT_STATUS_OK;
}
struct auth_session_info *system_session(TALLOC_CTX *mem_ctx)
{
NTSTATUS nt_status;
struct auth_session_info *session_info = NULL;
nt_status = auth_system_session_info(mem_ctx, &session_info);
if (!NT_STATUS_IS_OK(nt_status)) {
return NULL;
}
return session_info;
}
/****************************************************************************
prints a struct auth_session_info security token to debug output.
****************************************************************************/
void auth_session_info_debug(int dbg_lev,
const struct auth_session_info *session_info)
{
if (!session_info) {
DEBUG(dbg_lev, ("Session Info: (NULL)\n"));
return;
}
security_token_debug(dbg_lev, session_info->security_token);
}
/**
* Squash an NT_STATUS in line with security requirements.
* In an attempt to avoid giving the whole game away when users
* are authenticating, NT replaces both NT_STATUS_NO_SUCH_USER and
* NT_STATUS_WRONG_PASSWORD with NT_STATUS_LOGON_FAILURE in certain situations
* (session setups in particular).
*
* @param nt_status NTSTATUS input for squashing.
* @return the 'squashed' nt_status
**/
NTSTATUS auth_nt_status_squash(NTSTATUS nt_status)
{
if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
/* Match WinXP and don't give the game away */
return NT_STATUS_LOGON_FAILURE;
} else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
/* Match WinXP and don't give the game away */
return NT_STATUS_LOGON_FAILURE;
}
return nt_status;
}