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samba-mirror/source4/auth/session.c

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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/security/security.h"
#include "libcli/auth/libcli_auth.h"
#include "dsdb/samdb/samdb.h"
#include "auth/credentials/credentials.h"
#include "param/param.h"
#include "auth/session_proto.h"
_PUBLIC_ struct auth_session_info *anonymous_session(TALLOC_CTX *mem_ctx,
struct loadparm_context *lp_ctx)
{
NTSTATUS nt_status;
struct auth_session_info *session_info = NULL;
nt_status = auth_anonymous_session_info(mem_ctx, lp_ctx, &session_info);
if (!NT_STATUS_IS_OK(nt_status)) {
return NULL;
}
return session_info;
}
_PUBLIC_ NTSTATUS auth_anonymous_session_info(TALLOC_CTX *parent_ctx,
struct loadparm_context *lp_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,
lp_netbios_name(lp_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, lp_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, lp_ctx);
cli_credentials_set_anonymous(session_info->credentials);
*_session_info = session_info;
return NT_STATUS_OK;
}
_PUBLIC_ NTSTATUS auth_anonymous_server_info(TALLOC_CTX *mem_ctx,
const char *netbios_name,
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, 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;
}
_PUBLIC_ NTSTATUS auth_generate_session_info(TALLOC_CTX *mem_ctx,
struct loadparm_context *lp_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,
lp_ctx,
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;
}
/**
* 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);
}
/**
* Make a server_info struct from the info3 returned by a domain logon
*/
_PUBLIC_ 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;
}