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samba-mirror/source4/kdc/hdb-samba4.c

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/*
* Copyright (c) 1999-2001, 2003, PADL Software Pty Ltd.
* Copyright (c) 2004, Andrew Bartlett <abartlet@samba.org>.
* Copyright (c) 2004, Stefan Metzmacher <metze@samba.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of PADL Software nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "includes.h"
#include "system/time.h"
#include "dsdb/common/flags.h"
#include "lib/ldb/include/ldb.h"
#include "lib/ldb/include/ldb_errors.h"
#include "librpc/gen_ndr/netlogon.h"
#include "auth/auth.h"
#include "auth/credentials/credentials.h"
#include "auth/auth_sam.h"
#include "util/util_ldb.h"
#include "dsdb/samdb/samdb.h"
#include "librpc/ndr/libndr.h"
#include "librpc/gen_ndr/ndr_drsblobs.h"
#include "librpc/gen_ndr/lsa.h"
#include "libcli/auth/libcli_auth.h"
#include "param/param.h"
#include "events/events.h"
#include "kdc/kdc.h"
2008-09-24 17:30:23 +04:00
#include "../lib/crypto/md4.h"
enum hdb_ldb_ent_type
{ HDB_SAMBA4_ENT_TYPE_CLIENT, HDB_SAMBA4_ENT_TYPE_SERVER,
HDB_SAMBA4_ENT_TYPE_KRBTGT, HDB_SAMBA4_ENT_TYPE_TRUST, HDB_SAMBA4_ENT_TYPE_ANY };
enum trust_direction {
UNKNOWN = 0,
INBOUND = LSA_TRUST_DIRECTION_INBOUND,
OUTBOUND = LSA_TRUST_DIRECTION_OUTBOUND
};
static const char *realm_ref_attrs[] = {
"nCName",
"dnsRoot",
NULL
};
static const char *trust_attrs[] = {
"trustPartner",
"trustAuthIncoming",
"trustAuthOutgoing",
"whenCreated",
"msDS-SupportedEncryptionTypes",
"trustAttributes",
"trustDirection",
"trustType",
NULL
};
static KerberosTime ldb_msg_find_krb5time_ldap_time(struct ldb_message *msg, const char *attr, KerberosTime default_val)
{
const char *tmp;
const char *gentime;
struct tm tm;
gentime = ldb_msg_find_attr_as_string(msg, attr, NULL);
if (!gentime)
return default_val;
tmp = strptime(gentime, "%Y%m%d%H%M%SZ", &tm);
if (tmp == NULL) {
return default_val;
}
return timegm(&tm);
}
static HDBFlags uf2HDBFlags(krb5_context context, int userAccountControl, enum hdb_ldb_ent_type ent_type)
{
HDBFlags flags = int2HDBFlags(0);
/* we don't allow kadmin deletes */
flags.immutable = 1;
/* mark the principal as invalid to start with */
flags.invalid = 1;
flags.renewable = 1;
/* All accounts are servers, but this may be disabled again in the caller */
flags.server = 1;
/* Account types - clear the invalid bit if it turns out to be valid */
if (userAccountControl & UF_NORMAL_ACCOUNT) {
if (ent_type == HDB_SAMBA4_ENT_TYPE_CLIENT || ent_type == HDB_SAMBA4_ENT_TYPE_ANY) {
flags.client = 1;
}
flags.invalid = 0;
}
if (userAccountControl & UF_INTERDOMAIN_TRUST_ACCOUNT) {
if (ent_type == HDB_SAMBA4_ENT_TYPE_CLIENT || ent_type == HDB_SAMBA4_ENT_TYPE_ANY) {
flags.client = 1;
}
flags.invalid = 0;
}
if (userAccountControl & UF_WORKSTATION_TRUST_ACCOUNT) {
if (ent_type == HDB_SAMBA4_ENT_TYPE_CLIENT || ent_type == HDB_SAMBA4_ENT_TYPE_ANY) {
flags.client = 1;
}
flags.invalid = 0;
}
if (userAccountControl & UF_SERVER_TRUST_ACCOUNT) {
if (ent_type == HDB_SAMBA4_ENT_TYPE_CLIENT || ent_type == HDB_SAMBA4_ENT_TYPE_ANY) {
flags.client = 1;
}
flags.invalid = 0;
}
/* Not permitted to act as a client if disabled */
if (userAccountControl & UF_ACCOUNTDISABLE) {
flags.client = 0;
}
if (userAccountControl & UF_LOCKOUT) {
flags.invalid = 1;
}
/*
if (userAccountControl & UF_PASSWORD_NOTREQD) {
flags.invalid = 1;
}
*/
/*
UF_PASSWORD_CANT_CHANGE and UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED are irrelevent
*/
if (userAccountControl & UF_TEMP_DUPLICATE_ACCOUNT) {
flags.invalid = 1;
}
/* UF_DONT_EXPIRE_PASSWD and UF_USE_DES_KEY_ONLY handled in LDB_message2entry() */
/*
if (userAccountControl & UF_MNS_LOGON_ACCOUNT) {
flags.invalid = 1;
}
*/
if (userAccountControl & UF_SMARTCARD_REQUIRED) {
flags.require_hwauth = 1;
}
if (userAccountControl & UF_TRUSTED_FOR_DELEGATION) {
flags.ok_as_delegate = 1;
}
if (!(userAccountControl & UF_NOT_DELEGATED)) {
flags.forwardable = 1;
flags.proxiable = 1;
}
if (userAccountControl & UF_DONT_REQUIRE_PREAUTH) {
flags.require_preauth = 0;
} else {
flags.require_preauth = 1;
}
return flags;
}
static int hdb_ldb_destructor(struct hdb_ldb_private *private)
{
hdb_entry_ex *entry_ex = private->entry_ex;
free_hdb_entry(&entry_ex->entry);
return 0;
}
static void hdb_ldb_free_entry(krb5_context context, hdb_entry_ex *entry_ex)
{
talloc_free(entry_ex->ctx);
}
static krb5_error_code LDB_message2entry_keys(krb5_context context,
struct smb_iconv_convenience *iconv_convenience,
TALLOC_CTX *mem_ctx,
struct ldb_message *msg,
unsigned int userAccountControl,
hdb_entry_ex *entry_ex)
{
krb5_error_code ret = 0;
enum ndr_err_code ndr_err;
struct samr_Password *hash;
const struct ldb_val *sc_val;
struct supplementalCredentialsBlob scb;
struct supplementalCredentialsPackage *scpk = NULL;
bool newer_keys = false;
struct package_PrimaryKerberosBlob _pkb;
struct package_PrimaryKerberosCtr3 *pkb3 = NULL;
struct package_PrimaryKerberosCtr4 *pkb4 = NULL;
uint32_t i;
uint32_t allocated_keys = 0;
entry_ex->entry.keys.val = NULL;
entry_ex->entry.keys.len = 0;
entry_ex->entry.kvno = ldb_msg_find_attr_as_int(msg, "msDS-KeyVersionNumber", 0);
/* Get keys from the db */
hash = samdb_result_hash(mem_ctx, msg, "unicodePwd");
sc_val = ldb_msg_find_ldb_val(msg, "supplementalCredentials");
/* unicodePwd for enctype 0x17 (23) if present */
if (hash) {
allocated_keys++;
}
/* supplementalCredentials if present */
if (sc_val) {
ndr_err = ndr_pull_struct_blob_all(sc_val, mem_ctx, iconv_convenience, &scb,
(ndr_pull_flags_fn_t)ndr_pull_supplementalCredentialsBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
dump_data(0, sc_val->data, sc_val->length);
ret = EINVAL;
goto out;
}
if (scb.sub.signature != SUPPLEMENTAL_CREDENTIALS_SIGNATURE) {
NDR_PRINT_DEBUG(supplementalCredentialsBlob, &scb);
ret = EINVAL;
goto out;
}
for (i=0; i < scb.sub.num_packages; i++) {
if (strcmp("Primary:Kerberos-Newer-Keys", scb.sub.packages[i].name) == 0) {
scpk = &scb.sub.packages[i];
if (!scpk->data || !scpk->data[0]) {
scpk = NULL;
continue;
}
newer_keys = true;
break;
} else if (strcmp("Primary:Kerberos", scb.sub.packages[i].name) == 0) {
scpk = &scb.sub.packages[i];
if (!scpk->data || !scpk->data[0]) {
scpk = NULL;
}
/*
* we don't break here in hope to find
* a Kerberos-Newer-Keys package
*/
}
}
}
/*
* Primary:Kerberos-Newer-Keys or Primary:Kerberos element
* of supplementalCredentials
*/
if (scpk) {
DATA_BLOB blob;
blob = strhex_to_data_blob(scpk->data);
if (!blob.data) {
ret = ENOMEM;
goto out;
}
talloc_steal(mem_ctx, blob.data);
/* we cannot use ndr_pull_struct_blob_all() here, as w2k and w2k3 add padding bytes */
ndr_err = ndr_pull_struct_blob(&blob, mem_ctx, iconv_convenience, &_pkb,
(ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
krb5_set_error_string(context, "LDB_message2entry_keys: could not parse package_PrimaryKerberosBlob");
krb5_warnx(context, "LDB_message2entry_keys: could not parse package_PrimaryKerberosBlob");
ret = EINVAL;
goto out;
}
if (newer_keys && _pkb.version != 4) {
krb5_set_error_string(context, "LDB_message2entry_keys: Primary:Kerberos-Newer-Keys not version 4");
krb5_warnx(context, "LDB_message2entry_keys: Primary:Kerberos-Newer-Keys not version 4");
ret = EINVAL;
goto out;
}
if (!newer_keys && _pkb.version != 3) {
krb5_set_error_string(context, "LDB_message2entry_keys: could not parse Primary:Kerberos not version 3");
krb5_warnx(context, "LDB_message2entry_keys: could not parse Primary:Kerberos not version 3");
ret = EINVAL;
goto out;
}
if (_pkb.version == 4) {
pkb4 = &_pkb.ctr.ctr4;
allocated_keys += pkb4->num_keys;
} else if (_pkb.version == 3) {
pkb3 = &_pkb.ctr.ctr3;
allocated_keys += pkb3->num_keys;
}
}
if (allocated_keys == 0) {
/* oh, no password. Apparently (comment in
* hdb-ldap.c) this violates the ASN.1, but this
* allows an entry with no keys (yet). */
return 0;
}
/* allocate space to decode into */
entry_ex->entry.keys.len = 0;
entry_ex->entry.keys.val = calloc(allocated_keys, sizeof(Key));
if (entry_ex->entry.keys.val == NULL) {
ret = ENOMEM;
goto out;
}
if (hash && !(userAccountControl & UF_USE_DES_KEY_ONLY)) {
Key key;
key.mkvno = 0;
key.salt = NULL; /* No salt for this enc type */
ret = krb5_keyblock_init(context,
ENCTYPE_ARCFOUR_HMAC_MD5,
hash->hash, sizeof(hash->hash),
&key.key);
if (ret) {
goto out;
}
entry_ex->entry.keys.val[entry_ex->entry.keys.len] = key;
entry_ex->entry.keys.len++;
}
if (pkb4) {
for (i=0; i < pkb4->num_keys; i++) {
bool use = true;
Key key;
if (!pkb4->keys[i].value) continue;
if (userAccountControl & UF_USE_DES_KEY_ONLY) {
switch (pkb4->keys[i].keytype) {
case ENCTYPE_DES_CBC_CRC:
case ENCTYPE_DES_CBC_MD5:
break;
default:
use = false;
break;
}
}
if (!use) continue;
key.mkvno = 0;
key.salt = NULL;
if (pkb4->salt.string) {
DATA_BLOB salt;
salt = data_blob_string_const(pkb4->salt.string);
key.salt = calloc(1, sizeof(*key.salt));
if (key.salt == NULL) {
ret = ENOMEM;
goto out;
}
key.salt->type = hdb_pw_salt;
ret = krb5_data_copy(&key.salt->salt, salt.data, salt.length);
if (ret) {
free(key.salt);
key.salt = NULL;
goto out;
}
}
/* TODO: maybe pass the iteration_count somehow... */
ret = krb5_keyblock_init(context,
pkb4->keys[i].keytype,
pkb4->keys[i].value->data,
pkb4->keys[i].value->length,
&key.key);
if (ret) {
if (key.salt) {
free_Salt(key.salt);
free(key.salt);
key.salt = NULL;
}
goto out;
}
entry_ex->entry.keys.val[entry_ex->entry.keys.len] = key;
entry_ex->entry.keys.len++;
}
} else if (pkb3) {
for (i=0; i < pkb3->num_keys; i++) {
bool use = true;
Key key;
if (!pkb3->keys[i].value) continue;
if (userAccountControl & UF_USE_DES_KEY_ONLY) {
switch (pkb3->keys[i].keytype) {
case ENCTYPE_DES_CBC_CRC:
case ENCTYPE_DES_CBC_MD5:
break;
default:
use = false;
break;
}
}
if (!use) continue;
key.mkvno = 0;
key.salt = NULL;
if (pkb3->salt.string) {
DATA_BLOB salt;
salt = data_blob_string_const(pkb3->salt.string);
key.salt = calloc(1, sizeof(*key.salt));
if (key.salt == NULL) {
ret = ENOMEM;
goto out;
}
key.salt->type = hdb_pw_salt;
ret = krb5_data_copy(&key.salt->salt, salt.data, salt.length);
if (ret) {
free(key.salt);
key.salt = NULL;
goto out;
}
}
ret = krb5_keyblock_init(context,
pkb3->keys[i].keytype,
pkb3->keys[i].value->data,
pkb3->keys[i].value->length,
&key.key);
if (ret) {
if (key.salt) {
free_Salt(key.salt);
free(key.salt);
key.salt = NULL;
}
goto out;
}
entry_ex->entry.keys.val[entry_ex->entry.keys.len] = key;
entry_ex->entry.keys.len++;
}
}
out:
if (ret != 0) {
entry_ex->entry.keys.len = 0;
}
if (entry_ex->entry.keys.len == 0 && entry_ex->entry.keys.val) {
free(entry_ex->entry.keys.val);
entry_ex->entry.keys.val = NULL;
}
return ret;
}
/*
* Construct an hdb_entry from a directory entry.
*/
static krb5_error_code LDB_message2entry(krb5_context context, HDB *db,
TALLOC_CTX *mem_ctx, krb5_const_principal principal,
enum hdb_ldb_ent_type ent_type,
struct ldb_message *msg,
struct ldb_message *realm_ref_msg,
hdb_entry_ex *entry_ex)
{
unsigned int userAccountControl;
int i;
krb5_error_code ret = 0;
krb5_boolean is_computer = FALSE;
const char *dnsdomain = ldb_msg_find_attr_as_string(realm_ref_msg, "dnsRoot", NULL);
char *realm = strupper_talloc(mem_ctx, dnsdomain);
struct loadparm_context *lp_ctx = ldb_get_opaque((struct ldb_context *)db->hdb_db, "loadparm");
struct ldb_dn *domain_dn = samdb_result_dn((struct ldb_context *)db->hdb_db,
mem_ctx,
realm_ref_msg,
"nCName",
ldb_dn_new(mem_ctx, (struct ldb_context *)db->hdb_db, NULL));
struct hdb_ldb_private *private;
NTTIME acct_expiry;
struct ldb_message_element *objectclasses;
struct ldb_val computer_val;
computer_val.data = discard_const_p(uint8_t,"computer");
computer_val.length = strlen((const char *)computer_val.data);
objectclasses = ldb_msg_find_element(msg, "objectClass");
if (objectclasses && ldb_msg_find_val(objectclasses, &computer_val)) {
is_computer = TRUE;
}
memset(entry_ex, 0, sizeof(*entry_ex));
if (!realm) {
krb5_set_error_string(context, "talloc_strdup: out of memory");
ret = ENOMEM;
goto out;
}
private = talloc(mem_ctx, struct hdb_ldb_private);
if (!private) {
ret = ENOMEM;
goto out;
}
private->entry_ex = entry_ex;
private->iconv_convenience = lp_iconv_convenience(lp_ctx);
private->netbios_name = lp_netbios_name(lp_ctx);
talloc_set_destructor(private, hdb_ldb_destructor);
entry_ex->ctx = private;
entry_ex->free_entry = hdb_ldb_free_entry;
userAccountControl = ldb_msg_find_attr_as_uint(msg, "userAccountControl", 0);
entry_ex->entry.principal = malloc(sizeof(*(entry_ex->entry.principal)));
if (ent_type == HDB_SAMBA4_ENT_TYPE_ANY && principal == NULL) {
const char *samAccountName = ldb_msg_find_attr_as_string(msg, "samAccountName", NULL);
if (!samAccountName) {
krb5_set_error_string(context, "LDB_message2entry: no samAccountName present");
ret = ENOENT;
goto out;
}
samAccountName = ldb_msg_find_attr_as_string(msg, "samAccountName", NULL);
krb5_make_principal(context, &entry_ex->entry.principal, realm, samAccountName, NULL);
} else {
char *strdup_realm;
ret = copy_Principal(principal, entry_ex->entry.principal);
if (ret) {
krb5_clear_error_string(context);
goto out;
}
/* While we have copied the client principal, tests
* show that Win2k3 returns the 'corrected' realm, not
* the client-specified realm. This code attempts to
* replace the client principal's realm with the one
* we determine from our records */
/* this has to be with malloc() */
strdup_realm = strdup(realm);
if (!strdup_realm) {
ret = ENOMEM;
krb5_clear_error_string(context);
goto out;
}
free(*krb5_princ_realm(context, entry_ex->entry.principal));
krb5_princ_set_realm(context, entry_ex->entry.principal, &strdup_realm);
}
entry_ex->entry.flags = uf2HDBFlags(context, userAccountControl, ent_type);
if (ent_type == HDB_SAMBA4_ENT_TYPE_KRBTGT) {
entry_ex->entry.flags.invalid = 0;
entry_ex->entry.flags.server = 1;
entry_ex->entry.flags.forwardable = 1;
entry_ex->entry.flags.ok_as_delegate = 1;
}
if (lp_parm_bool(lp_ctx, NULL, "kdc", "require spn for service", true)) {
if (!is_computer && !ldb_msg_find_attr_as_string(msg, "servicePrincipalName", NULL)) {
entry_ex->entry.flags.server = 0;
}
}
/* use 'whenCreated' */
entry_ex->entry.created_by.time = ldb_msg_find_krb5time_ldap_time(msg, "whenCreated", 0);
/* use '???' */
entry_ex->entry.created_by.principal = NULL;
entry_ex->entry.modified_by = (Event *) malloc(sizeof(Event));
if (entry_ex->entry.modified_by == NULL) {
krb5_set_error_string(context, "malloc: out of memory");
ret = ENOMEM;
goto out;
}
/* use 'whenChanged' */
entry_ex->entry.modified_by->time = ldb_msg_find_krb5time_ldap_time(msg, "whenChanged", 0);
/* use '???' */
entry_ex->entry.modified_by->principal = NULL;
entry_ex->entry.valid_start = NULL;
acct_expiry = samdb_result_account_expires(msg);
if (acct_expiry == 0x7FFFFFFFFFFFFFFFULL) {
entry_ex->entry.valid_end = NULL;
} else {
entry_ex->entry.valid_end = malloc(sizeof(*entry_ex->entry.valid_end));
if (entry_ex->entry.valid_end == NULL) {
ret = ENOMEM;
goto out;
}
*entry_ex->entry.valid_end = nt_time_to_unix(acct_expiry);
}
if (ent_type != HDB_SAMBA4_ENT_TYPE_KRBTGT) {
NTTIME must_change_time
= samdb_result_force_password_change((struct ldb_context *)db->hdb_db, mem_ctx,
domain_dn, msg);
if (must_change_time == 0x7FFFFFFFFFFFFFFFULL) {
entry_ex->entry.pw_end = NULL;
} else {
entry_ex->entry.pw_end = malloc(sizeof(*entry_ex->entry.pw_end));
if (entry_ex->entry.pw_end == NULL) {
ret = ENOMEM;
goto out;
}
*entry_ex->entry.pw_end = nt_time_to_unix(must_change_time);
}
} else {
entry_ex->entry.pw_end = NULL;
}
entry_ex->entry.max_life = NULL;
entry_ex->entry.max_renew = NULL;
entry_ex->entry.generation = NULL;
/* Get keys from the db */
ret = LDB_message2entry_keys(context, private->iconv_convenience, private, msg, userAccountControl, entry_ex);
if (ret) {
/* Could be bougus data in the entry, or out of memory */
goto out;
}
entry_ex->entry.etypes = malloc(sizeof(*(entry_ex->entry.etypes)));
if (entry_ex->entry.etypes == NULL) {
krb5_clear_error_string(context);
ret = ENOMEM;
goto out;
}
entry_ex->entry.etypes->len = entry_ex->entry.keys.len;
entry_ex->entry.etypes->val = calloc(entry_ex->entry.etypes->len, sizeof(int));
if (entry_ex->entry.etypes->val == NULL) {
krb5_clear_error_string(context);
ret = ENOMEM;
goto out;
}
for (i=0; i < entry_ex->entry.etypes->len; i++) {
entry_ex->entry.etypes->val[i] = entry_ex->entry.keys.val[i].key.keytype;
}
private->msg = talloc_steal(private, msg);
private->realm_ref_msg = talloc_steal(private, realm_ref_msg);
private->samdb = (struct ldb_context *)db->hdb_db;
out:
if (ret != 0) {
/* This doesn't free ent itself, that is for the eventual caller to do */
hdb_free_entry(context, entry_ex);
} else {
talloc_steal(db, entry_ex->ctx);
}
return ret;
}
/*
* Construct an hdb_entry from a directory entry.
*/
static krb5_error_code LDB_trust_message2entry(krb5_context context, HDB *db,
struct loadparm_context *lp_ctx,
TALLOC_CTX *mem_ctx, krb5_const_principal principal,
enum trust_direction direction,
struct ldb_message *msg,
hdb_entry_ex *entry_ex)
{
const char *dnsdomain;
char *realm;
char *strdup_realm;
DATA_BLOB password_utf16;
struct samr_Password password_hash;
const struct ldb_val *password_val;
struct trustAuthInOutBlob password_blob;
struct hdb_ldb_private *private;
enum ndr_err_code ndr_err;
int i, ret, trust_direction_flags;
private = talloc(mem_ctx, struct hdb_ldb_private);
if (!private) {
ret = ENOMEM;
goto out;
}
private->entry_ex = entry_ex;
private->iconv_convenience = lp_iconv_convenience(lp_ctx);
private->netbios_name = lp_netbios_name(lp_ctx);
talloc_set_destructor(private, hdb_ldb_destructor);
entry_ex->ctx = private;
entry_ex->free_entry = hdb_ldb_free_entry;
/* use 'whenCreated' */
entry_ex->entry.created_by.time = ldb_msg_find_krb5time_ldap_time(msg, "whenCreated", 0);
/* use '???' */
entry_ex->entry.created_by.principal = NULL;
entry_ex->entry.valid_start = NULL;
trust_direction_flags = ldb_msg_find_attr_as_int(msg, "trustDirection", 0);
if (direction == INBOUND) {
realm = strupper_talloc(mem_ctx, lp_realm(lp_ctx));
password_val = ldb_msg_find_ldb_val(msg, "trustAuthIncoming");
} else { /* OUTBOUND */
dnsdomain = ldb_msg_find_attr_as_string(msg, "trustPartner", NULL);
realm = strupper_talloc(mem_ctx, dnsdomain);
password_val = ldb_msg_find_ldb_val(msg, "trustAuthOutgoing");
}
if (!password_val || !(trust_direction_flags & direction)) {
ret = ENOENT;
goto out;
}
ndr_err = ndr_pull_struct_blob(password_val, mem_ctx, private->iconv_convenience, &password_blob,
(ndr_pull_flags_fn_t)ndr_pull_trustAuthInOutBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
ret = EINVAL;
goto out;
}
2008-10-04 03:36:49 +04:00
entry_ex->entry.kvno = -1;
for (i=0; i < password_blob.count; i++) {
if (password_blob.current->array[i].AuthType == TRUST_AUTH_TYPE_VERSION) {
entry_ex->entry.kvno = password_blob.current->array[i].AuthInfo.version.version;
}
}
for (i=0; i < password_blob.count; i++) {
if (password_blob.current->array[i].AuthType == TRUST_AUTH_TYPE_CLEAR) {
password_utf16 = data_blob_const(password_blob.current->array[i].AuthInfo.clear.password,
password_blob.current->array[i].AuthInfo.clear.size);
/* In the future, generate all sorts of
* hashes, but for now we can't safely convert
* the random strings windows uses into
* utf8 */
/* but as it is utf16 already, we can get the NT password/arcfour-hmac-md5 key */
mdfour(password_hash.hash, password_utf16.data, password_utf16.length);
break;
} else if (password_blob.current->array[i].AuthType == TRUST_AUTH_TYPE_NT4OWF) {
password_hash = password_blob.current->array[i].AuthInfo.nt4owf.password;
break;
}
}
entry_ex->entry.keys.len = 0;
entry_ex->entry.keys.val = NULL;
if (i < password_blob.count) {
Key key;
/* Must have found a cleartext or MD4 password */
entry_ex->entry.keys.val = calloc(1, sizeof(Key));
key.mkvno = 0;
key.salt = NULL; /* No salt for this enc type */
if (entry_ex->entry.keys.val == NULL) {
ret = ENOMEM;
goto out;
}
ret = krb5_keyblock_init(context,
ENCTYPE_ARCFOUR_HMAC_MD5,
password_hash.hash, sizeof(password_hash.hash),
&key.key);
entry_ex->entry.keys.val[entry_ex->entry.keys.len] = key;
entry_ex->entry.keys.len++;
}
entry_ex->entry.principal = malloc(sizeof(*(entry_ex->entry.principal)));
ret = copy_Principal(principal, entry_ex->entry.principal);
if (ret) {
krb5_clear_error_string(context);
goto out;
}
/* While we have copied the client principal, tests
* show that Win2k3 returns the 'corrected' realm, not
* the client-specified realm. This code attempts to
* replace the client principal's realm with the one
* we determine from our records */
/* this has to be with malloc() */
strdup_realm = strdup(realm);
if (!strdup_realm) {
ret = ENOMEM;
krb5_clear_error_string(context);
goto out;
}
free(*krb5_princ_realm(context, entry_ex->entry.principal));
krb5_princ_set_realm(context, entry_ex->entry.principal, &strdup_realm);
entry_ex->entry.flags = int2HDBFlags(0);
entry_ex->entry.flags.immutable = 1;
entry_ex->entry.flags.invalid = 0;
entry_ex->entry.flags.server = 1;
entry_ex->entry.flags.require_preauth = 1;
entry_ex->entry.pw_end = NULL;
entry_ex->entry.max_life = NULL;
entry_ex->entry.max_renew = NULL;
entry_ex->entry.generation = NULL;
entry_ex->entry.etypes = malloc(sizeof(*(entry_ex->entry.etypes)));
if (entry_ex->entry.etypes == NULL) {
krb5_clear_error_string(context);
ret = ENOMEM;
goto out;
}
entry_ex->entry.etypes->len = entry_ex->entry.keys.len;
entry_ex->entry.etypes->val = calloc(entry_ex->entry.etypes->len, sizeof(int));
if (entry_ex->entry.etypes->val == NULL) {
krb5_clear_error_string(context);
ret = ENOMEM;
goto out;
}
for (i=0; i < entry_ex->entry.etypes->len; i++) {
entry_ex->entry.etypes->val[i] = entry_ex->entry.keys.val[i].key.keytype;
}
private->msg = talloc_steal(private, msg);
private->realm_ref_msg = NULL;
private->samdb = (struct ldb_context *)db->hdb_db;
out:
if (ret != 0) {
/* This doesn't free ent itself, that is for the eventual caller to do */
hdb_free_entry(context, entry_ex);
} else {
talloc_steal(db, entry_ex->ctx);
}
return ret;
}
static krb5_error_code LDB_lookup_principal(krb5_context context, struct ldb_context *ldb_ctx,
TALLOC_CTX *mem_ctx,
krb5_const_principal principal,
enum hdb_ldb_ent_type ent_type,
struct ldb_dn *realm_dn,
struct ldb_message ***pmsg)
{
krb5_error_code ret;
int lret;
char *filter = NULL;
const char * const *princ_attrs = user_attrs;
char *short_princ;
char *short_princ_talloc;
struct ldb_result *res = NULL;
ret = krb5_unparse_name_flags(context, principal, KRB5_PRINCIPAL_UNPARSE_NO_REALM, &short_princ);
if (ret != 0) {
krb5_set_error_string(context, "LDB_lookup_principal: could not parse principal");
krb5_warnx(context, "LDB_lookup_principal: could not parse principal");
return ret;
}
short_princ_talloc = talloc_strdup(mem_ctx, short_princ);
free(short_princ);
if (!short_princ_talloc) {
krb5_set_error_string(context, "LDB_lookup_principal: talloc_strdup() failed!");
return ENOMEM;
}
switch (ent_type) {
case HDB_SAMBA4_ENT_TYPE_CLIENT:
case HDB_SAMBA4_ENT_TYPE_TRUST:
case HDB_SAMBA4_ENT_TYPE_ANY:
/* Can't happen */
return EINVAL;
case HDB_SAMBA4_ENT_TYPE_KRBTGT:
filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(samAccountName=%s))",
KRB5_TGS_NAME);
break;
case HDB_SAMBA4_ENT_TYPE_SERVER:
filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(samAccountName=%s))",
short_princ_talloc);
break;
}
if (!filter) {
krb5_set_error_string(context, "talloc_asprintf: out of memory");
return ENOMEM;
}
lret = ldb_search(ldb_ctx, mem_ctx, &res, realm_dn,
LDB_SCOPE_SUBTREE, princ_attrs, "%s", filter);
if (lret != LDB_SUCCESS) {
DEBUG(3, ("Failed to search for %s: %s\n", filter, ldb_errstring(ldb_ctx)));
return HDB_ERR_NOENTRY;
} else if (res->count == 0 || res->count > 1) {
DEBUG(3, ("Failed find a single entry for %s: got %d\n", filter, res->count));
talloc_free(res);
return HDB_ERR_NOENTRY;
}
talloc_steal(mem_ctx, res->msgs);
*pmsg = res->msgs;
talloc_free(res);
return 0;
}
static krb5_error_code LDB_lookup_trust(krb5_context context, struct ldb_context *ldb_ctx,
TALLOC_CTX *mem_ctx,
const char *realm,
struct ldb_dn *realm_dn,
struct ldb_message ***pmsg)
{
int lret;
char *filter = NULL;
const char * const *attrs = trust_attrs;
struct ldb_result *res = NULL;
filter = talloc_asprintf(mem_ctx, "(&(objectClass=trustedDomain)(|(flatname=%s)(trustPartner=%s)))", realm, realm);
if (!filter) {
krb5_set_error_string(context, "talloc_asprintf: out of memory");
return ENOMEM;
}
lret = ldb_search(ldb_ctx, mem_ctx, &res,
ldb_get_default_basedn(ldb_ctx),
LDB_SCOPE_SUBTREE, attrs, "%s", filter);
if (lret != LDB_SUCCESS) {
DEBUG(3, ("Failed to search for %s: %s\n", filter, ldb_errstring(ldb_ctx)));
return HDB_ERR_NOENTRY;
} else if (res->count == 0 || res->count > 1) {
DEBUG(3, ("Failed find a single entry for %s: got %d\n", filter, res->count));
talloc_free(res);
return HDB_ERR_NOENTRY;
}
talloc_steal(mem_ctx, res->msgs);
*pmsg = res->msgs;
talloc_free(res);
return 0;
}
static krb5_error_code LDB_lookup_realm(krb5_context context, struct ldb_context *ldb_ctx,
TALLOC_CTX *mem_ctx,
const char *realm,
struct ldb_message ***pmsg)
{
int ret;
struct ldb_result *cross_ref_res;
struct ldb_dn *partitions_basedn = samdb_partitions_dn(ldb_ctx, mem_ctx);
ret = ldb_search(ldb_ctx, mem_ctx, &cross_ref_res,
partitions_basedn, LDB_SCOPE_SUBTREE, realm_ref_attrs,
"(&(&(|(&(dnsRoot=%s)(nETBIOSName=*))(nETBIOSName=%s))(objectclass=crossRef))(ncName=*))",
realm, realm);
if (ret != LDB_SUCCESS) {
DEBUG(3, ("Failed to search to lookup realm(%s): %s\n", realm, ldb_errstring(ldb_ctx)));
talloc_free(cross_ref_res);
return HDB_ERR_NOENTRY;
} else if (cross_ref_res->count == 0 || cross_ref_res->count > 1) {
DEBUG(3, ("Failed find a single entry for realm %s: got %d\n", realm, cross_ref_res->count));
talloc_free(cross_ref_res);
return HDB_ERR_NOENTRY;
}
if (pmsg) {
*pmsg = cross_ref_res->msgs;
talloc_steal(mem_ctx, cross_ref_res->msgs);
}
talloc_free(cross_ref_res);
return 0;
}
static krb5_error_code LDB_open(krb5_context context, HDB *db, int flags, mode_t mode)
{
if (db->hdb_master_key_set) {
krb5_warnx(context, "LDB_open: use of a master key incompatible with LDB\n");
krb5_set_error_string(context, "LDB_open: use of a master key incompatible with LDB\n");
return HDB_ERR_NOENTRY;
}
return 0;
}
static krb5_error_code LDB_close(krb5_context context, HDB *db)
{
return 0;
}
static krb5_error_code LDB_lock(krb5_context context, HDB *db, int operation)
{
return 0;
}
static krb5_error_code LDB_unlock(krb5_context context, HDB *db)
{
return 0;
}
static krb5_error_code LDB_rename(krb5_context context, HDB *db, const char *new_name)
{
return HDB_ERR_DB_INUSE;
}
static krb5_error_code LDB_fetch_client(krb5_context context, HDB *db,
TALLOC_CTX *mem_ctx,
krb5_const_principal principal,
unsigned flags,
hdb_entry_ex *entry_ex) {
NTSTATUS nt_status;
char *principal_string;
krb5_error_code ret;
struct ldb_message **msg = NULL;
struct ldb_message **realm_ref_msg = NULL;
ret = krb5_unparse_name(context, principal, &principal_string);
if (ret != 0) {
return ret;
}
nt_status = sam_get_results_principal((struct ldb_context *)db->hdb_db,
mem_ctx, principal_string,
&msg, &realm_ref_msg);
free(principal_string);
if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER)) {
return HDB_ERR_NOENTRY;
} else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_MEMORY)) {
return ENOMEM;
} else if (!NT_STATUS_IS_OK(nt_status)) {
return EINVAL;
}
ret = LDB_message2entry(context, db, mem_ctx,
principal, HDB_SAMBA4_ENT_TYPE_CLIENT,
msg[0], realm_ref_msg[0], entry_ex);
return ret;
}
static krb5_error_code LDB_fetch_krbtgt(krb5_context context, HDB *db,
TALLOC_CTX *mem_ctx,
krb5_const_principal principal,
unsigned flags,
hdb_entry_ex *entry_ex)
{
krb5_error_code ret;
struct ldb_message **msg = NULL;
struct ldb_message **realm_ref_msg_1 = NULL;
struct ldb_message **realm_ref_msg_2 = NULL;
struct ldb_dn *realm_dn;
const char *realm;
krb5_principal alloc_principal = NULL;
if (principal->name.name_string.len != 2
|| (strcmp(principal->name.name_string.val[0], KRB5_TGS_NAME) != 0)) {
/* Not a krbtgt */
return HDB_ERR_NOENTRY;
}
/* krbtgt case. Either us or a trusted realm */
if ((LDB_lookup_realm(context, (struct ldb_context *)db->hdb_db,
mem_ctx, principal->realm, &realm_ref_msg_1) == 0)
&& (LDB_lookup_realm(context, (struct ldb_context *)db->hdb_db,
mem_ctx, principal->name.name_string.val[1], &realm_ref_msg_2) == 0)
&& (ldb_dn_compare(realm_ref_msg_1[0]->dn, realm_ref_msg_1[0]->dn) == 0)) {
/* us */
/* Cludge, cludge cludge. If the realm part of krbtgt/realm,
* is in our db, then direct the caller at our primary
* krbtgt */
const char *dnsdomain = ldb_msg_find_attr_as_string(realm_ref_msg_1[0], "dnsRoot", NULL);
char *realm_fixed = strupper_talloc(mem_ctx, dnsdomain);
if (!realm_fixed) {
krb5_set_error_string(context, "strupper_talloc: out of memory");
return ENOMEM;
}
ret = krb5_copy_principal(context, principal, &alloc_principal);
if (ret) {
return ret;
}
free(alloc_principal->name.name_string.val[1]);
alloc_principal->name.name_string.val[1] = strdup(realm_fixed);
talloc_free(realm_fixed);
if (!alloc_principal->name.name_string.val[1]) {
krb5_set_error_string(context, "LDB_fetch: strdup() failed!");
return ENOMEM;
}
principal = alloc_principal;
realm_dn = samdb_result_dn((struct ldb_context *)db->hdb_db, mem_ctx, realm_ref_msg_1[0], "nCName", NULL);
ret = LDB_lookup_principal(context, (struct ldb_context *)db->hdb_db,
mem_ctx,
principal, HDB_SAMBA4_ENT_TYPE_KRBTGT, realm_dn, &msg);
if (ret != 0) {
krb5_warnx(context, "LDB_fetch: could not find principal in DB");
krb5_set_error_string(context, "LDB_fetch: could not find principal in DB");
return ret;
}
ret = LDB_message2entry(context, db, mem_ctx,
principal, HDB_SAMBA4_ENT_TYPE_KRBTGT,
msg[0], realm_ref_msg_1[0], entry_ex);
if (ret != 0) {
krb5_warnx(context, "LDB_fetch: self krbtgt message2entry failed");
}
return ret;
} else {
enum trust_direction direction = UNKNOWN;
struct loadparm_context *lp_ctx = talloc_get_type(ldb_get_opaque(db->hdb_db, "loadparm"), struct loadparm_context);
/* Either an inbound or outbound trust */
if (strcasecmp(lp_realm(lp_ctx), principal->realm) == 0) {
/* look for inbound trust */
direction = INBOUND;
realm = principal->name.name_string.val[1];
}
if (strcasecmp(lp_realm(lp_ctx), principal->name.name_string.val[1]) == 0) {
/* look for outbound trust */
direction = OUTBOUND;
realm = principal->realm;
}
/* Trusted domains are under CN=system */
ret = LDB_lookup_trust(context, (struct ldb_context *)db->hdb_db,
mem_ctx,
realm, realm_dn, &msg);
if (ret != 0) {
krb5_warnx(context, "LDB_fetch: could not find principal in DB");
krb5_set_error_string(context, "LDB_fetch: could not find principal in DB");
return ret;
}
ret = LDB_trust_message2entry(context, db, lp_ctx, mem_ctx,
principal, direction,
msg[0], entry_ex);
if (ret != 0) {
krb5_warnx(context, "LDB_fetch: trust_message2entry failed");
}
return ret;
/* we should lookup trusted domains */
return HDB_ERR_NOENTRY;
}
}
static krb5_error_code LDB_fetch_server(krb5_context context, HDB *db,
TALLOC_CTX *mem_ctx,
krb5_const_principal principal,
unsigned flags,
hdb_entry_ex *entry_ex)
{
krb5_error_code ret;
const char *realm;
struct ldb_message **msg = NULL;
struct ldb_message **realm_ref_msg = NULL;
struct ldb_dn *partitions_basedn = samdb_partitions_dn(db->hdb_db, mem_ctx);
if (principal->name.name_string.len >= 2) {
/* 'normal server' case */
int ldb_ret;
NTSTATUS nt_status;
struct ldb_dn *user_dn, *domain_dn;
char *principal_string;
ret = krb5_unparse_name_flags(context, principal,
KRB5_PRINCIPAL_UNPARSE_NO_REALM,
&principal_string);
if (ret != 0) {
return ret;
}
/* At this point we may find the host is known to be
* in a different realm, so we should generate a
* referral instead */
nt_status = crack_service_principal_name((struct ldb_context *)db->hdb_db,
mem_ctx, principal_string,
&user_dn, &domain_dn);
free(principal_string);
if (!NT_STATUS_IS_OK(nt_status)) {
return HDB_ERR_NOENTRY;
}
ldb_ret = gendb_search_dn((struct ldb_context *)db->hdb_db,
mem_ctx, user_dn, &msg, user_attrs);
if (ldb_ret != 1) {
return HDB_ERR_NOENTRY;
}
ldb_ret = gendb_search((struct ldb_context *)db->hdb_db,
mem_ctx, partitions_basedn, &realm_ref_msg, realm_ref_attrs,
"ncName=%s", ldb_dn_get_linearized(domain_dn));
if (ldb_ret != 1) {
return HDB_ERR_NOENTRY;
}
} else {
struct ldb_dn *realm_dn;
/* server as client principal case, but we must not lookup userPrincipalNames */
realm = krb5_principal_get_realm(context, principal);
ret = LDB_lookup_realm(context, (struct ldb_context *)db->hdb_db,
mem_ctx, realm, &realm_ref_msg);
if (ret != 0) {
return HDB_ERR_NOENTRY;
}
realm_dn = samdb_result_dn((struct ldb_context *)db->hdb_db, mem_ctx, realm_ref_msg[0], "nCName", NULL);
ret = LDB_lookup_principal(context, (struct ldb_context *)db->hdb_db,
mem_ctx,
principal, HDB_SAMBA4_ENT_TYPE_SERVER, realm_dn, &msg);
if (ret != 0) {
return ret;
}
}
ret = LDB_message2entry(context, db, mem_ctx,
principal, HDB_SAMBA4_ENT_TYPE_SERVER,
msg[0], realm_ref_msg[0], entry_ex);
if (ret != 0) {
krb5_warnx(context, "LDB_fetch: message2entry failed");
}
return ret;
}
static krb5_error_code LDB_fetch(krb5_context context, HDB *db,
krb5_const_principal principal,
unsigned flags,
hdb_entry_ex *entry_ex)
{
krb5_error_code ret = HDB_ERR_NOENTRY;
TALLOC_CTX *mem_ctx = talloc_named(db, 0, "LDB_fetch context");
if (!mem_ctx) {
krb5_set_error_string(context, "LDB_fetch: talloc_named() failed!");
return ENOMEM;
}
if (flags & HDB_F_GET_CLIENT) {
ret = LDB_fetch_client(context, db, mem_ctx, principal, flags, entry_ex);
if (ret != HDB_ERR_NOENTRY) goto done;
}
if (flags & HDB_F_GET_SERVER) {
/* krbtgt fits into this situation for trusted realms, and for resolving different versions of our own realm name */
ret = LDB_fetch_krbtgt(context, db, mem_ctx, principal, flags, entry_ex);
if (ret != HDB_ERR_NOENTRY) goto done;
/* We return 'no entry' if it does not start with krbtgt/, so move to the common case quickly */
ret = LDB_fetch_server(context, db, mem_ctx, principal, flags, entry_ex);
if (ret != HDB_ERR_NOENTRY) goto done;
}
if (flags & HDB_F_GET_KRBTGT) {
ret = LDB_fetch_krbtgt(context, db, mem_ctx, principal, flags, entry_ex);
if (ret != HDB_ERR_NOENTRY) goto done;
}
done:
talloc_free(mem_ctx);
return ret;
}
static krb5_error_code LDB_store(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
{
return HDB_ERR_DB_INUSE;
}
static krb5_error_code LDB_remove(krb5_context context, HDB *db, krb5_const_principal principal)
{
return HDB_ERR_DB_INUSE;
}
struct hdb_ldb_seq {
struct ldb_context *ctx;
int index;
int count;
struct ldb_message **msgs;
struct ldb_message **realm_ref_msgs;
};
static krb5_error_code LDB_seq(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
{
krb5_error_code ret;
struct hdb_ldb_seq *priv = (struct hdb_ldb_seq *)db->hdb_dbc;
TALLOC_CTX *mem_ctx;
hdb_entry_ex entry_ex;
memset(&entry_ex, '\0', sizeof(entry_ex));
if (!priv) {
return HDB_ERR_NOENTRY;
}
mem_ctx = talloc_named(priv, 0, "LDB_seq context");
if (!mem_ctx) {
krb5_set_error_string(context, "LDB_seq: talloc_named() failed!");
return ENOMEM;
}
if (priv->index < priv->count) {
ret = LDB_message2entry(context, db, mem_ctx,
NULL, HDB_SAMBA4_ENT_TYPE_ANY,
priv->msgs[priv->index++],
priv->realm_ref_msgs[0], entry);
} else {
ret = HDB_ERR_NOENTRY;
}
if (ret != 0) {
talloc_free(priv);
db->hdb_dbc = NULL;
} else {
talloc_free(mem_ctx);
}
return ret;
}
static krb5_error_code LDB_firstkey(krb5_context context, HDB *db, unsigned flags,
hdb_entry_ex *entry)
{
struct ldb_context *ldb_ctx = (struct ldb_context *)db->hdb_db;
struct hdb_ldb_seq *priv = (struct hdb_ldb_seq *)db->hdb_dbc;
char *realm;
struct ldb_dn *realm_dn = NULL;
struct ldb_result *res = NULL;
struct ldb_message **realm_ref_msgs = NULL;
krb5_error_code ret;
TALLOC_CTX *mem_ctx;
int lret;
if (priv) {
talloc_free(priv);
db->hdb_dbc = NULL;
}
priv = (struct hdb_ldb_seq *) talloc(db, struct hdb_ldb_seq);
if (!priv) {
krb5_set_error_string(context, "talloc: out of memory");
return ENOMEM;
}
priv->ctx = ldb_ctx;
priv->index = 0;
priv->msgs = NULL;
priv->realm_ref_msgs = NULL;
priv->count = 0;
mem_ctx = talloc_named(priv, 0, "LDB_firstkey context");
if (!mem_ctx) {
krb5_set_error_string(context, "LDB_firstkey: talloc_named() failed!");
return ENOMEM;
}
ret = krb5_get_default_realm(context, &realm);
if (ret != 0) {
talloc_free(priv);
return ret;
}
ret = LDB_lookup_realm(context, (struct ldb_context *)db->hdb_db,
mem_ctx, realm, &realm_ref_msgs);
free(realm);
if (ret != 0) {
talloc_free(priv);
krb5_warnx(context, "LDB_firstkey: could not find realm\n");
return HDB_ERR_NOENTRY;
}
realm_dn = samdb_result_dn((struct ldb_context *)db->hdb_db, mem_ctx, realm_ref_msgs[0], "nCName", NULL);
priv->realm_ref_msgs = talloc_steal(priv, realm_ref_msgs);
lret = ldb_search(ldb_ctx, priv, &res,
realm_dn, LDB_SCOPE_SUBTREE, user_attrs,
"(objectClass=user)");
if (lret != LDB_SUCCESS) {
talloc_free(priv);
return HDB_ERR_NOENTRY;
}
priv->count = res->count;
priv->msgs = talloc_steal(priv, res->msgs);
talloc_free(res);
db->hdb_dbc = priv;
ret = LDB_seq(context, db, flags, entry);
if (ret != 0) {
talloc_free(priv);
db->hdb_dbc = NULL;
} else {
talloc_free(mem_ctx);
}
return ret;
}
static krb5_error_code LDB_nextkey(krb5_context context, HDB *db, unsigned flags,
hdb_entry_ex *entry)
{
return LDB_seq(context, db, flags, entry);
}
static krb5_error_code LDB_destroy(krb5_context context, HDB *db)
{
talloc_free(db);
return 0;
}
/* This interface is to be called by the KDC, which is expecting Samba
* calling conventions. It is also called by a wrapper
* (hdb_ldb_create) from the kpasswdd -> krb5 -> keytab_hdb -> hdb
* code */
NTSTATUS kdc_hdb_samba4_create(TALLOC_CTX *mem_ctx,
struct event_context *ev_ctx,
struct loadparm_context *lp_ctx,
krb5_context context, struct HDB **db, const char *arg)
{
NTSTATUS nt_status;
struct auth_session_info *session_info;
*db = talloc(mem_ctx, HDB);
if (!*db) {
krb5_set_error_string(context, "malloc: out of memory");
return NT_STATUS_NO_MEMORY;
}
(*db)->hdb_master_key_set = 0;
(*db)->hdb_db = NULL;
nt_status = auth_system_session_info(*db, lp_ctx, &session_info);
if (!NT_STATUS_IS_OK(nt_status)) {
return nt_status;
}
/* The idea here is very simple. Using Kerberos to
* authenticate the KDC to the LDAP server is higly likely to
* be circular.
*
* In future we may set this up to use EXERNAL and SSL
* certificates, for now it will almost certainly be NTLMSSP
*/
cli_credentials_set_kerberos_state(session_info->credentials,
CRED_DONT_USE_KERBEROS);
/* Setup the link to LDB */
(*db)->hdb_db = samdb_connect(*db, ev_ctx, lp_ctx, session_info);
if ((*db)->hdb_db == NULL) {
DEBUG(1, ("hdb_ldb_create: Cannot open samdb for KDC backend!"));
return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
}
(*db)->hdb_dbc = NULL;
(*db)->hdb_open = LDB_open;
(*db)->hdb_close = LDB_close;
(*db)->hdb_fetch = LDB_fetch;
(*db)->hdb_store = LDB_store;
(*db)->hdb_remove = LDB_remove;
(*db)->hdb_firstkey = LDB_firstkey;
(*db)->hdb_nextkey = LDB_nextkey;
(*db)->hdb_lock = LDB_lock;
(*db)->hdb_unlock = LDB_unlock;
(*db)->hdb_rename = LDB_rename;
/* we don't implement these, as we are not a lockable database */
(*db)->hdb__get = NULL;
(*db)->hdb__put = NULL;
/* kadmin should not be used for deletes - use other tools instead */
(*db)->hdb__del = NULL;
(*db)->hdb_destroy = LDB_destroy;
return NT_STATUS_OK;
}
krb5_error_code hdb_samba4_create(krb5_context context, struct HDB **db, const char *arg)
{
NTSTATUS nt_status;
/* The global kdc_mem_ctx and kdc_lp_ctx, Disgusting, ugly hack, but it means one less private hook */
nt_status = kdc_hdb_samba4_create(kdc_mem_ctx, event_context_find(kdc_mem_ctx), kdc_lp_ctx,
context, db, arg);
if (NT_STATUS_IS_OK(nt_status)) {
return 0;
}
return EINVAL;
}