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/*
Unix SMB/CIFS implementation.
dump the remote SAM using rpc samsync operations
Copyright (C) Guenther Deschner 2008.
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 "libnet/libnet.h"
#if defined(HAVE_ADS) && defined(ENCTYPE_ARCFOUR_HMAC)
/****************************************************************
****************************************************************/
static NTSTATUS keytab_ad_connect(TALLOC_CTX *mem_ctx,
const char *domain_name,
const char *username,
const char *password,
struct libnet_keytab_context *ctx)
{
NTSTATUS status;
ADS_STATUS ad_status;
ADS_STRUCT *ads;
struct netr_DsRGetDCNameInfo *info = NULL;
const char *dc;
status = dsgetdcname(mem_ctx, NULL, domain_name, NULL, NULL, 0, &info);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
dc = strip_hostname(info->dc_unc);
ads = ads_init(NULL, domain_name, dc);
NT_STATUS_HAVE_NO_MEMORY(ads);
if (getenv(KRB5_ENV_CCNAME) == NULL) {
setenv(KRB5_ENV_CCNAME, "MEMORY:libnet_samsync_keytab", 1);
}
ads->auth.user_name = SMB_STRDUP(username);
ads->auth.password = SMB_STRDUP(password);
ad_status = ads_connect_user_creds(ads);
if (!ADS_ERR_OK(ad_status)) {
return NT_STATUS_UNSUCCESSFUL;
}
ctx->ads = ads;
ctx->dns_domain_name = talloc_strdup_upper(mem_ctx, ads->config.realm);
NT_STATUS_HAVE_NO_MEMORY(ctx->dns_domain_name);
return NT_STATUS_OK;
}
/****************************************************************
****************************************************************/
static NTSTATUS fetch_sam_entry_keytab(TALLOC_CTX *mem_ctx,
enum netr_SamDatabaseID database_id,
uint32_t rid,
struct netr_DELTA_USER *r,
bool last_query,
struct libnet_keytab_context *ctx)
{
uchar nt_passwd[16];
struct libnet_keytab_entry entry;
if (memcmp(r->ntpassword.hash, ctx->zero_buf, 16) == 0) {
return NT_STATUS_OK;
}
sam_pwd_hash(rid, r->ntpassword.hash, nt_passwd, 0);
entry.name = talloc_strdup(mem_ctx, r->account_name.string);
entry.principal = talloc_asprintf(mem_ctx, "%s@%s",
r->account_name.string,
ctx->dns_domain_name);
entry.password = data_blob_talloc(mem_ctx, nt_passwd, 16);
entry.kvno = ads_get_kvno(ctx->ads, entry.name);
NT_STATUS_HAVE_NO_MEMORY(entry.name);
NT_STATUS_HAVE_NO_MEMORY(entry.principal);
NT_STATUS_HAVE_NO_MEMORY(entry.password.data);
ADD_TO_ARRAY(mem_ctx, struct libnet_keytab_entry, entry,
&ctx->entries, &ctx->count);
return NT_STATUS_OK;
}
/****************************************************************
****************************************************************/
NTSTATUS fetch_sam_entries_keytab(TALLOC_CTX *mem_ctx,
enum netr_SamDatabaseID database_id,
struct netr_DELTA_ENUM_ARRAY *r,
bool last_query,
struct samsync_context *ctx)
{
NTSTATUS status = NT_STATUS_OK;
krb5_error_code ret = 0;
struct libnet_keytab_context *keytab_ctx = NULL;
int i;
ret = libnet_keytab_init(mem_ctx, ctx->output_filename, &keytab_ctx);
if (ret) {
status = krb5_to_nt_status(ret);
goto out;
}
status = keytab_ad_connect(mem_ctx,
ctx->domain_name,
ctx->username,
ctx->password,
keytab_ctx);
if (!NT_STATUS_IS_OK(status)) {
goto out;
}
for (i = 0; i < r->num_deltas; i++) {
if (r->delta_enum[i].delta_type != NETR_DELTA_USER) {
continue;
}
status = fetch_sam_entry_keytab(mem_ctx, database_id,
r->delta_enum[i].delta_id_union.rid,
r->delta_enum[i].delta_union.user,
last_query,
keytab_ctx);
if (!NT_STATUS_IS_OK(status)) {
goto out;
}
}
ret = libnet_keytab_add(keytab_ctx);
if (ret) {
status = krb5_to_nt_status(ret);
ctx->error_message = talloc_asprintf(mem_ctx,
"Failed to add entries to keytab %s: %s",
keytab_ctx->keytab_name, error_message(ret));
goto out;
}
if (last_query) {
ctx->result_message = talloc_asprintf(mem_ctx,
"Vampired %d accounts to keytab %s",
keytab_ctx->count,
keytab_ctx->keytab_name);
TALLOC_FREE(keytab_ctx);
}
return NT_STATUS_OK;
out:
TALLOC_FREE(keytab_ctx);
return status;
}
#else
NTSTATUS fetch_sam_entries_keytab(TALLOC_CTX *mem_ctx,
enum netr_SamDatabaseID database_id,
struct netr_DELTA_ENUM_ARRAY *r,
bool last_query,
struct samsync_context *ctx)
{
return NT_STATUS_NOT_SUPPORTED;
}
#endif /* defined(HAVE_ADS) && defined(ENCTYPE_ARCFOUR_HMAC) */
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