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openldap/contrib/slapd-modules/smbk5pwd/smbk5pwd.c
Ryan Tandy 829027945f ITS#7877 use nettle instead of gcrypt
2014-06-30 20:07:41 -07:00

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/* smbk5pwd.c - Overlay for managing Samba and Heimdal passwords */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2004-2014 The OpenLDAP Foundation.
* Portions Copyright 2004-2005 by Howard Chu, Symas Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/* ACKNOWLEDGEMENTS:
* Support for table-driven configuration added by Pierangelo Masarati.
* Support for sambaPwdMustChange and sambaPwdCanChange added by Marco D'Ettorre.
* Support for shadowLastChange added by SATOH Fumiyasu @ OSS Technology, Inc.
*/
#include <portable.h>
#ifndef SLAPD_OVER_SMBK5PWD
#define SLAPD_OVER_SMBK5PWD SLAPD_MOD_DYNAMIC
#endif
#ifdef SLAPD_OVER_SMBK5PWD
#include <slap.h>
#include <ac/errno.h>
#include <ac/string.h>
#include "config.h"
#ifdef DO_KRB5
#include <lber.h>
#include <lber_pvt.h>
#include <lutil.h>
/* make ASN1_MALLOC_ENCODE use our allocator */
#define malloc ch_malloc
#include <krb5.h>
#include <kadm5/admin.h>
#include <hdb.h>
#ifndef HDB_INTERFACE_VERSION
#define HDB_MASTER_KEY_SET master_key_set
#else
#define HDB_MASTER_KEY_SET hdb_master_key_set
#endif
static krb5_context context;
static void *kadm_context;
static kadm5_config_params conf;
static HDB *db;
static AttributeDescription *ad_krb5Key;
static AttributeDescription *ad_krb5KeyVersionNumber;
static AttributeDescription *ad_krb5PrincipalName;
static AttributeDescription *ad_krb5ValidEnd;
static ObjectClass *oc_krb5KDCEntry;
#endif
#ifdef DO_SAMBA
#ifdef HAVE_GNUTLS
#include <nettle/des.h>
#include <nettle/md4.h>
typedef unsigned char DES_cblock[8];
#elif HAVE_OPENSSL
#include <openssl/des.h>
#include <openssl/md4.h>
#else
#error Unsupported crypto backend.
#endif
#include "ldap_utf8.h"
static AttributeDescription *ad_sambaLMPassword;
static AttributeDescription *ad_sambaNTPassword;
static AttributeDescription *ad_sambaPwdLastSet;
static AttributeDescription *ad_sambaPwdMustChange;
static AttributeDescription *ad_sambaPwdCanChange;
static ObjectClass *oc_sambaSamAccount;
#endif
#ifdef DO_SHADOW
static AttributeDescription *ad_shadowLastChange;
static ObjectClass *oc_shadowAccount;
#endif
/* Per-instance configuration information */
typedef struct smbk5pwd_t {
unsigned mode;
#define SMBK5PWD_F_KRB5 (0x1U)
#define SMBK5PWD_F_SAMBA (0x2U)
#define SMBK5PWD_F_SHADOW (0x4U)
#define SMBK5PWD_DO_KRB5(pi) ((pi)->mode & SMBK5PWD_F_KRB5)
#define SMBK5PWD_DO_SAMBA(pi) ((pi)->mode & SMBK5PWD_F_SAMBA)
#define SMBK5PWD_DO_SHADOW(pi) ((pi)->mode & SMBK5PWD_F_SHADOW)
#ifdef DO_KRB5
/* nothing yet */
#endif
#ifdef DO_SAMBA
/* How many seconds before forcing a password change? */
time_t smb_must_change;
/* How many seconds after allowing a password change? */
time_t smb_can_change;
#endif
#ifdef DO_SHADOW
/* nothing yet */
#endif
} smbk5pwd_t;
static const unsigned SMBK5PWD_F_ALL =
0
#ifdef DO_KRB5
| SMBK5PWD_F_KRB5
#endif
#ifdef DO_SAMBA
| SMBK5PWD_F_SAMBA
#endif
#ifdef DO_SHADOW
| SMBK5PWD_F_SHADOW
#endif
;
static int smbk5pwd_modules_init( smbk5pwd_t *pi );
#ifdef DO_SAMBA
static const char hex[] = "0123456789abcdef";
/* From liblutil/passwd.c... */
static void lmPasswd_to_key(
const char *lmPasswd,
DES_cblock *key)
{
const unsigned char *lpw = (const unsigned char *)lmPasswd;
unsigned char *k = (unsigned char *)key;
/* make room for parity bits */
k[0] = lpw[0];
k[1] = ((lpw[0]&0x01)<<7) | (lpw[1]>>1);
k[2] = ((lpw[1]&0x03)<<6) | (lpw[2]>>2);
k[3] = ((lpw[2]&0x07)<<5) | (lpw[3]>>3);
k[4] = ((lpw[3]&0x0F)<<4) | (lpw[4]>>4);
k[5] = ((lpw[4]&0x1F)<<3) | (lpw[5]>>5);
k[6] = ((lpw[5]&0x3F)<<2) | (lpw[6]>>6);
k[7] = ((lpw[6]&0x7F)<<1);
#ifdef HAVE_OPENSSL
des_set_odd_parity( key );
#endif
}
#define MAX_PWLEN 256
#define HASHLEN 16
static void hexify(
const char in[HASHLEN],
struct berval *out
)
{
int i;
char *a;
unsigned char *b;
out->bv_val = ch_malloc(HASHLEN*2 + 1);
out->bv_len = HASHLEN*2;
a = out->bv_val;
b = (unsigned char *)in;
for (i=0; i<HASHLEN; i++) {
*a++ = hex[*b >> 4];
*a++ = hex[*b++ & 0x0f];
}
*a++ = '\0';
}
static void lmhash(
struct berval *passwd,
struct berval *hash
)
{
char UcasePassword[15];
DES_cblock key;
DES_cblock StdText = "KGS!@#$%";
DES_cblock hbuf[2];
#ifdef HAVE_OPENSSL
DES_key_schedule schedule;
#elif defined(HAVE_GNUTLS)
struct des_ctx ctx;
#endif
strncpy( UcasePassword, passwd->bv_val, 14 );
UcasePassword[14] = '\0';
ldap_pvt_str2upper( UcasePassword );
lmPasswd_to_key( UcasePassword, &key );
#ifdef HAVE_GNUTLS
des_set_key( &ctx, &key );
des_encrypt( &ctx, sizeof(key), &hbuf[0], &StdText );
lmPasswd_to_key( &UcasePassword[7], &key );
des_set_key( &ctx, &key );
des_encrypt( &ctx, sizeof(key), &hbuf[1], &StdText );
#elif defined(HAVE_OPENSSL)
des_set_key_unchecked( &key, schedule );
des_ecb_encrypt( &StdText, &hbuf[0], schedule , DES_ENCRYPT );
lmPasswd_to_key( &UcasePassword[7], &key );
des_set_key_unchecked( &key, schedule );
des_ecb_encrypt( &StdText, &hbuf[1], schedule , DES_ENCRYPT );
#endif
hexify( (char *)hbuf, hash );
}
static void nthash(
struct berval *passwd,
struct berval *hash
)
{
/* Windows currently only allows 14 character passwords, but
* may support up to 256 in the future. We assume this means
* 256 UCS2 characters, not 256 bytes...
*/
char hbuf[HASHLEN];
#ifdef HAVE_OPENSSL
MD4_CTX ctx;
#elif defined(HAVE_GNUTLS)
struct md4_ctx ctx;
#endif
if (passwd->bv_len > MAX_PWLEN*2)
passwd->bv_len = MAX_PWLEN*2;
#ifdef HAVE_OPENSSL
MD4_Init( &ctx );
MD4_Update( &ctx, passwd->bv_val, passwd->bv_len );
MD4_Final( (unsigned char *)hbuf, &ctx );
#elif defined(HAVE_GNUTLS)
md4_init( &ctx );
md4_update( &ctx, passwd->bv_len, passwd->bv_val );
md4_digest( &ctx, sizeof(hbuf), (unsigned char *)hbuf );
#endif
hexify( hbuf, hash );
}
#endif /* DO_SAMBA */
#ifdef DO_KRB5
static int smbk5pwd_op_cleanup(
Operation *op,
SlapReply *rs )
{
slap_callback *cb;
/* clear out the current key */
ldap_pvt_thread_pool_setkey( op->o_threadctx, smbk5pwd_op_cleanup,
NULL, 0, NULL, NULL );
/* free the callback */
cb = op->o_callback;
op->o_callback = cb->sc_next;
op->o_tmpfree( cb, op->o_tmpmemctx );
return 0;
}
static int smbk5pwd_op_bind(
Operation *op,
SlapReply *rs )
{
/* If this is a simple Bind, stash the Op pointer so our chk
* function can find it. Set a cleanup callback to clear it
* out when the Bind completes.
*/
if ( op->oq_bind.rb_method == LDAP_AUTH_SIMPLE ) {
slap_callback *cb;
ldap_pvt_thread_pool_setkey( op->o_threadctx,
smbk5pwd_op_cleanup, op, 0, NULL, NULL );
cb = op->o_tmpcalloc( 1, sizeof(slap_callback), op->o_tmpmemctx );
cb->sc_cleanup = smbk5pwd_op_cleanup;
cb->sc_next = op->o_callback;
op->o_callback = cb;
}
return SLAP_CB_CONTINUE;
}
static LUTIL_PASSWD_CHK_FUNC k5key_chk;
static LUTIL_PASSWD_HASH_FUNC k5key_hash;
static const struct berval k5key_scheme = BER_BVC("{K5KEY}");
/* This password scheme stores no data in the userPassword attribute
* other than the scheme name. It assumes the invoking entry is a
* krb5KDCentry and compares the passed-in credentials against the
* krb5Key attribute. The krb5Key may be multi-valued, but they are
* simply multiple keytypes generated from the same input string, so
* only the first value needs to be compared here.
*
* Since the lutil_passwd API doesn't pass the Entry object in, we
* have to fetch it ourselves in order to get access to the other
* attributes. We accomplish this with the help of the overlay's Bind
* function, which stores the current Operation pointer in thread-specific
* storage so we can retrieve it here. The Operation provides all
* the necessary context for us to get Entry from the database.
*/
static int k5key_chk(
const struct berval *sc,
const struct berval *passwd,
const struct berval *cred,
const char **text )
{
void *ctx, *op_tmp;
Operation *op;
int rc;
Entry *e;
Attribute *a;
krb5_error_code ret;
krb5_keyblock key;
krb5_salt salt;
hdb_entry ent;
/* Find our thread context, find our Operation */
ctx = ldap_pvt_thread_pool_context();
if ( ldap_pvt_thread_pool_getkey( ctx, smbk5pwd_op_cleanup, &op_tmp, NULL )
|| !op_tmp )
return LUTIL_PASSWD_ERR;
op = op_tmp;
rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
if ( rc != LDAP_SUCCESS ) return LUTIL_PASSWD_ERR;
rc = LUTIL_PASSWD_ERR;
do {
size_t l;
Key ekey = {0};
a = attr_find( e->e_attrs, ad_krb5PrincipalName );
if (!a ) break;
memset( &ent, 0, sizeof(ent) );
ret = krb5_parse_name(context, a->a_vals[0].bv_val, &ent.principal);
if ( ret ) break;
a = attr_find( e->e_attrs, ad_krb5ValidEnd );
if (a) {
struct lutil_tm tm;
struct lutil_timet tt;
if ( lutil_parsetime( a->a_vals[0].bv_val, &tm ) == 0 &&
lutil_tm2time( &tm, &tt ) == 0 && tt.tt_usec < op->o_time ) {
/* Account is expired */
rc = LUTIL_PASSWD_ERR;
break;
}
}
krb5_get_pw_salt( context, ent.principal, &salt );
krb5_free_principal( context, ent.principal );
a = attr_find( e->e_attrs, ad_krb5Key );
if ( !a ) break;
ent.keys.len = 1;
ent.keys.val = &ekey;
decode_Key((unsigned char *) a->a_vals[0].bv_val,
(size_t) a->a_vals[0].bv_len, &ent.keys.val[0], &l);
if ( db->HDB_MASTER_KEY_SET )
hdb_unseal_keys( context, db, &ent );
krb5_string_to_key_salt( context, ekey.key.keytype, cred->bv_val,
salt, &key );
krb5_free_salt( context, salt );
if ( memcmp( ekey.key.keyvalue.data, key.keyvalue.data,
key.keyvalue.length ) == 0 ) rc = LUTIL_PASSWD_OK;
krb5_free_keyblock_contents( context, &key );
krb5_free_keyblock_contents( context, &ekey.key );
} while(0);
be_entry_release_r( op, e );
return rc;
}
static int k5key_hash(
const struct berval *scheme,
const struct berval *passwd,
struct berval *hash,
const char **text )
{
ber_dupbv( hash, (struct berval *)&k5key_scheme );
return LUTIL_PASSWD_OK;
}
#endif /* DO_KRB5 */
static int smbk5pwd_exop_passwd(
Operation *op,
SlapReply *rs )
{
int rc;
req_pwdexop_s *qpw = &op->oq_pwdexop;
Entry *e;
Modifications *ml;
slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
smbk5pwd_t *pi = on->on_bi.bi_private;
char term;
/* Not the operation we expected, pass it on... */
if ( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) ) {
return SLAP_CB_CONTINUE;
}
op->o_bd->bd_info = (BackendInfo *)on->on_info;
rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
if ( rc != LDAP_SUCCESS ) return rc;
term = qpw->rs_new.bv_val[qpw->rs_new.bv_len];
qpw->rs_new.bv_val[qpw->rs_new.bv_len] = '\0';
#ifdef DO_KRB5
/* Kerberos stuff */
do {
krb5_error_code ret;
hdb_entry ent;
struct berval *keys;
size_t nkeys;
int kvno, i;
Attribute *a;
if ( !SMBK5PWD_DO_KRB5( pi ) ) break;
if ( !is_entry_objectclass(e, oc_krb5KDCEntry, 0 ) ) break;
a = attr_find( e->e_attrs, ad_krb5PrincipalName );
if ( !a ) break;
memset( &ent, 0, sizeof(ent) );
ret = krb5_parse_name(context, a->a_vals[0].bv_val, &ent.principal);
if ( ret ) break;
a = attr_find( e->e_attrs, ad_krb5KeyVersionNumber );
kvno = 0;
if ( a ) {
if ( lutil_atoi( &kvno, a->a_vals[0].bv_val ) != 0 ) {
Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: "
"dn=\"%s\" unable to parse krb5KeyVersionNumber=\"%s\"\n",
op->o_log_prefix, e->e_name.bv_val, a->a_vals[0].bv_val );
}
} else {
/* shouldn't happen, this is a required attr */
Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: "
"dn=\"%s\" missing krb5KeyVersionNumber\n",
op->o_log_prefix, e->e_name.bv_val, 0 );
}
ret = hdb_generate_key_set_password(context, ent.principal,
qpw->rs_new.bv_val, &ent.keys.val, &nkeys);
ent.keys.len = nkeys;
hdb_seal_keys(context, db, &ent);
krb5_free_principal( context, ent.principal );
keys = ch_malloc( (ent.keys.len + 1) * sizeof(struct berval));
for (i = 0; i < ent.keys.len; i++) {
unsigned char *buf;
size_t len;
ASN1_MALLOC_ENCODE(Key, buf, len, &ent.keys.val[i], &len, ret);
if (ret != 0)
break;
keys[i].bv_val = (char *)buf;
keys[i].bv_len = len;
}
BER_BVZERO( &keys[i] );
hdb_free_keys(context, ent.keys.len, ent.keys.val);
if ( i != ent.keys.len ) {
ber_bvarray_free( keys );
break;
}
ml = ch_malloc(sizeof(Modifications));
if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next;
ml->sml_next = qpw->rs_mods;
qpw->rs_mods = ml;
ml->sml_desc = ad_krb5Key;
ml->sml_op = LDAP_MOD_REPLACE;
#ifdef SLAP_MOD_INTERNAL
ml->sml_flags = SLAP_MOD_INTERNAL;
#endif
ml->sml_numvals = i;
ml->sml_values = keys;
ml->sml_nvalues = NULL;
ml = ch_malloc(sizeof(Modifications));
ml->sml_next = qpw->rs_mods;
qpw->rs_mods = ml;
ml->sml_desc = ad_krb5KeyVersionNumber;
ml->sml_op = LDAP_MOD_REPLACE;
#ifdef SLAP_MOD_INTERNAL
ml->sml_flags = SLAP_MOD_INTERNAL;
#endif
ml->sml_numvals = 1;
ml->sml_values = ch_malloc( 2 * sizeof(struct berval));
ml->sml_values[0].bv_val = ch_malloc( 64 );
ml->sml_values[0].bv_len = sprintf(ml->sml_values[0].bv_val,
"%d", kvno+1 );
BER_BVZERO( &ml->sml_values[1] );
ml->sml_nvalues = NULL;
} while ( 0 );
#endif /* DO_KRB5 */
#ifdef DO_SAMBA
/* Samba stuff */
if ( SMBK5PWD_DO_SAMBA( pi ) && is_entry_objectclass(e, oc_sambaSamAccount, 0 ) ) {
struct berval *keys;
ber_len_t j,l;
wchar_t *wcs, wc;
char *c, *d;
struct berval pwd;
/* Expand incoming UTF8 string to UCS4 */
l = ldap_utf8_chars(qpw->rs_new.bv_val);
wcs = ch_malloc((l+1) * sizeof(wchar_t));
ldap_x_utf8s_to_wcs( wcs, qpw->rs_new.bv_val, l );
/* Truncate UCS4 to UCS2 */
c = (char *)wcs;
for (j=0; j<l; j++) {
wc = wcs[j];
*c++ = wc & 0xff;
*c++ = (wc >> 8) & 0xff;
}
*c++ = 0;
pwd.bv_val = (char *)wcs;
pwd.bv_len = l * 2;
ml = ch_malloc(sizeof(Modifications));
if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next;
ml->sml_next = qpw->rs_mods;
qpw->rs_mods = ml;
keys = ch_malloc( 2 * sizeof(struct berval) );
BER_BVZERO( &keys[1] );
nthash( &pwd, keys );
ml->sml_desc = ad_sambaNTPassword;
ml->sml_op = LDAP_MOD_REPLACE;
#ifdef SLAP_MOD_INTERNAL
ml->sml_flags = SLAP_MOD_INTERNAL;
#endif
ml->sml_numvals = 1;
ml->sml_values = keys;
ml->sml_nvalues = NULL;
/* Truncate UCS2 to 8-bit ASCII */
c = pwd.bv_val+1;
d = pwd.bv_val+2;
for (j=1; j<l; j++) {
*c++ = *d++;
d++;
}
pwd.bv_len /= 2;
pwd.bv_val[pwd.bv_len] = '\0';
ml = ch_malloc(sizeof(Modifications));
ml->sml_next = qpw->rs_mods;
qpw->rs_mods = ml;
keys = ch_malloc( 2 * sizeof(struct berval) );
BER_BVZERO( &keys[1] );
lmhash( &pwd, keys );
ml->sml_desc = ad_sambaLMPassword;
ml->sml_op = LDAP_MOD_REPLACE;
#ifdef SLAP_MOD_INTERNAL
ml->sml_flags = SLAP_MOD_INTERNAL;
#endif
ml->sml_numvals = 1;
ml->sml_values = keys;
ml->sml_nvalues = NULL;
ch_free(wcs);
ml = ch_malloc(sizeof(Modifications));
ml->sml_next = qpw->rs_mods;
qpw->rs_mods = ml;
keys = ch_malloc( 2 * sizeof(struct berval) );
keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
keys[0].bv_len = snprintf(keys[0].bv_val,
LDAP_PVT_INTTYPE_CHARS(long),
"%ld", slap_get_time());
BER_BVZERO( &keys[1] );
ml->sml_desc = ad_sambaPwdLastSet;
ml->sml_op = LDAP_MOD_REPLACE;
#ifdef SLAP_MOD_INTERNAL
ml->sml_flags = SLAP_MOD_INTERNAL;
#endif
ml->sml_numvals = 1;
ml->sml_values = keys;
ml->sml_nvalues = NULL;
if (pi->smb_must_change)
{
ml = ch_malloc(sizeof(Modifications));
ml->sml_next = qpw->rs_mods;
qpw->rs_mods = ml;
keys = ch_malloc( 2 * sizeof(struct berval) );
keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
keys[0].bv_len = snprintf(keys[0].bv_val,
LDAP_PVT_INTTYPE_CHARS(long),
"%ld", slap_get_time() + pi->smb_must_change);
BER_BVZERO( &keys[1] );
ml->sml_desc = ad_sambaPwdMustChange;
ml->sml_op = LDAP_MOD_REPLACE;
#ifdef SLAP_MOD_INTERNAL
ml->sml_flags = SLAP_MOD_INTERNAL;
#endif
ml->sml_numvals = 1;
ml->sml_values = keys;
ml->sml_nvalues = NULL;
}
if (pi->smb_can_change)
{
ml = ch_malloc(sizeof(Modifications));
ml->sml_next = qpw->rs_mods;
qpw->rs_mods = ml;
keys = ch_malloc( 2 * sizeof(struct berval) );
keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
keys[0].bv_len = snprintf(keys[0].bv_val,
LDAP_PVT_INTTYPE_CHARS(long),
"%ld", slap_get_time() + pi->smb_can_change);
BER_BVZERO( &keys[1] );
ml->sml_desc = ad_sambaPwdCanChange;
ml->sml_op = LDAP_MOD_REPLACE;
#ifdef SLAP_MOD_INTERNAL
ml->sml_flags = SLAP_MOD_INTERNAL;
#endif
ml->sml_numvals = 1;
ml->sml_values = keys;
ml->sml_nvalues = NULL;
}
}
#endif /* DO_SAMBA */
#ifdef DO_SHADOW
/* shadow stuff */
if ( SMBK5PWD_DO_SHADOW( pi ) && is_entry_objectclass(e, oc_shadowAccount, 0 ) ) {
struct berval *keys;
ml = ch_malloc(sizeof(Modifications));
if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next;
ml->sml_next = qpw->rs_mods;
qpw->rs_mods = ml;
keys = ch_malloc( sizeof(struct berval) * 2);
BER_BVZERO( &keys[1] );
keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
keys[0].bv_len = snprintf(keys[0].bv_val,
LDAP_PVT_INTTYPE_CHARS(long),
"%ld", (long)(slap_get_time() / (60 * 60 * 24)));
ml->sml_desc = ad_shadowLastChange;
ml->sml_op = LDAP_MOD_REPLACE;
#ifdef SLAP_MOD_INTERNAL
ml->sml_flags = SLAP_MOD_INTERNAL;
#endif
ml->sml_numvals = 1;
ml->sml_values = keys;
ml->sml_nvalues = NULL;
}
#endif /* DO_SHADOW */
be_entry_release_r( op, e );
qpw->rs_new.bv_val[qpw->rs_new.bv_len] = term;
return SLAP_CB_CONTINUE;
}
static slap_overinst smbk5pwd;
/* back-config stuff */
enum {
PC_SMB_MUST_CHANGE = 1,
PC_SMB_CAN_CHANGE,
PC_SMB_ENABLE
};
static ConfigDriver smbk5pwd_cf_func;
/*
* NOTE: uses OID arcs OLcfgCtAt:1 and OLcfgCtOc:1
*/
static ConfigTable smbk5pwd_cfats[] = {
{ "smbk5pwd-enable", "arg",
2, 0, 0, ARG_MAGIC|PC_SMB_ENABLE, smbk5pwd_cf_func,
"( OLcfgCtAt:1.1 NAME 'olcSmbK5PwdEnable' "
"DESC 'Modules to be enabled' "
"SYNTAX OMsDirectoryString )", NULL, NULL },
{ "smbk5pwd-must-change", "time",
2, 2, 0, ARG_MAGIC|ARG_INT|PC_SMB_MUST_CHANGE, smbk5pwd_cf_func,
"( OLcfgCtAt:1.2 NAME 'olcSmbK5PwdMustChange' "
"DESC 'Credentials validity interval' "
"SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
{ "smbk5pwd-can-change", "time",
2, 2, 0, ARG_MAGIC|ARG_INT|PC_SMB_CAN_CHANGE, smbk5pwd_cf_func,
"( OLcfgCtAt:1.3 NAME 'olcSmbK5PwdCanChange' "
"DESC 'Credentials minimum validity interval' "
"SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
{ NULL, NULL, 0, 0, 0, ARG_IGNORED }
};
static ConfigOCs smbk5pwd_cfocs[] = {
{ "( OLcfgCtOc:1.1 "
"NAME 'olcSmbK5PwdConfig' "
"DESC 'smbk5pwd overlay configuration' "
"SUP olcOverlayConfig "
"MAY ( "
"olcSmbK5PwdEnable "
"$ olcSmbK5PwdMustChange "
"$ olcSmbK5PwdCanChange "
") )", Cft_Overlay, smbk5pwd_cfats },
{ NULL, 0, NULL }
};
/*
* add here other functionalities; handle their initialization
* as appropriate in smbk5pwd_modules_init().
*/
static slap_verbmasks smbk5pwd_modules[] = {
{ BER_BVC( "krb5" ), SMBK5PWD_F_KRB5 },
{ BER_BVC( "samba" ), SMBK5PWD_F_SAMBA },
{ BER_BVC( "shadow" ), SMBK5PWD_F_SHADOW },
{ BER_BVNULL, -1 }
};
static int
smbk5pwd_cf_func( ConfigArgs *c )
{
slap_overinst *on = (slap_overinst *)c->bi;
int rc = 0;
smbk5pwd_t *pi = on->on_bi.bi_private;
if ( c->op == SLAP_CONFIG_EMIT ) {
switch( c->type ) {
case PC_SMB_MUST_CHANGE:
#ifdef DO_SAMBA
c->value_int = pi->smb_must_change;
#else /* ! DO_SAMBA */
c->value_int = 0;
#endif /* ! DO_SAMBA */
break;
case PC_SMB_CAN_CHANGE:
#ifdef DO_SAMBA
c->value_int = pi->smb_can_change;
#else /* ! DO_SAMBA */
c->value_int = 0;
#endif /* ! DO_SAMBA */
break;
case PC_SMB_ENABLE:
c->rvalue_vals = NULL;
if ( pi->mode ) {
mask_to_verbs( smbk5pwd_modules, pi->mode, &c->rvalue_vals );
if ( c->rvalue_vals == NULL ) {
rc = 1;
}
}
break;
default:
assert( 0 );
rc = 1;
}
return rc;
} else if ( c->op == LDAP_MOD_DELETE ) {
switch( c->type ) {
case PC_SMB_MUST_CHANGE:
break;
case PC_SMB_CAN_CHANGE:
break;
case PC_SMB_ENABLE:
if ( !c->line ) {
pi->mode = 0;
} else {
int i;
i = verb_to_mask( c->line, smbk5pwd_modules );
pi->mode &= ~smbk5pwd_modules[i].mask;
}
break;
default:
assert( 0 );
rc = 1;
}
return rc;
}
switch( c->type ) {
case PC_SMB_MUST_CHANGE:
#ifdef DO_SAMBA
if ( c->value_int < 0 ) {
Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
"<%s> invalid negative value \"%d\".",
c->log, c->argv[ 0 ], 0 );
return 1;
}
pi->smb_must_change = c->value_int;
#else /* ! DO_SAMBA */
Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
"<%s> only meaningful "
"when compiled with -DDO_SAMBA.\n",
c->log, c->argv[ 0 ], 0 );
return 1;
#endif /* ! DO_SAMBA */
break;
case PC_SMB_CAN_CHANGE:
#ifdef DO_SAMBA
if ( c->value_int < 0 ) {
Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
"<%s> invalid negative value \"%d\".",
c->log, c->argv[ 0 ], 0 );
return 1;
}
pi->smb_can_change = c->value_int;
#else /* ! DO_SAMBA */
Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
"<%s> only meaningful "
"when compiled with -DDO_SAMBA.\n",
c->log, c->argv[ 0 ], 0 );
return 1;
#endif /* ! DO_SAMBA */
break;
case PC_SMB_ENABLE: {
slap_mask_t mode = pi->mode, m = 0;
rc = verbs_to_mask( c->argc, c->argv, smbk5pwd_modules, &m );
if ( rc > 0 ) {
Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
"<%s> unknown module \"%s\".\n",
c->log, c->argv[ 0 ], c->argv[ rc ] );
return 1;
}
/* we can hijack the smbk5pwd_t structure because
* from within the configuration, this is the only
* active thread. */
pi->mode |= m;
#ifndef DO_KRB5
if ( SMBK5PWD_DO_KRB5( pi ) ) {
Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
"<%s> module \"%s\" only allowed when compiled with -DDO_KRB5.\n",
c->log, c->argv[ 0 ], c->argv[ rc ] );
pi->mode = mode;
return 1;
}
#endif /* ! DO_KRB5 */
#ifndef DO_SAMBA
if ( SMBK5PWD_DO_SAMBA( pi ) ) {
Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
"<%s> module \"%s\" only allowed when compiled with -DDO_SAMBA.\n",
c->log, c->argv[ 0 ], c->argv[ rc ] );
pi->mode = mode;
return 1;
}
#endif /* ! DO_SAMBA */
#ifndef DO_SHADOW
if ( SMBK5PWD_DO_SHADOW( pi ) ) {
Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
"<%s> module \"%s\" only allowed when compiled with -DDO_SHADOW.\n",
c->log, c->argv[ 0 ], c->argv[ rc ] );
pi->mode = mode;
return 1;
}
#endif /* ! DO_SHADOW */
{
BackendDB db = *c->be;
/* Re-initialize the module, because
* the configuration might have changed */
db.bd_info = (BackendInfo *)on;
rc = smbk5pwd_modules_init( pi );
if ( rc ) {
pi->mode = mode;
return 1;
}
}
} break;
default:
assert( 0 );
return 1;
}
return rc;
}
static int
smbk5pwd_modules_init( smbk5pwd_t *pi )
{
static struct {
const char *name;
AttributeDescription **adp;
}
#ifdef DO_KRB5
krb5_ad[] = {
{ "krb5Key", &ad_krb5Key },
{ "krb5KeyVersionNumber", &ad_krb5KeyVersionNumber },
{ "krb5PrincipalName", &ad_krb5PrincipalName },
{ "krb5ValidEnd", &ad_krb5ValidEnd },
{ NULL }
},
#endif /* DO_KRB5 */
#ifdef DO_SAMBA
samba_ad[] = {
{ "sambaLMPassword", &ad_sambaLMPassword },
{ "sambaNTPassword", &ad_sambaNTPassword },
{ "sambaPwdLastSet", &ad_sambaPwdLastSet },
{ "sambaPwdMustChange", &ad_sambaPwdMustChange },
{ "sambaPwdCanChange", &ad_sambaPwdCanChange },
{ NULL }
},
#endif /* DO_SAMBA */
#ifdef DO_SHADOW
shadow_ad[] = {
{ "shadowLastChange", &ad_shadowLastChange },
{ NULL }
},
#endif /* DO_SHADOW */
dummy_ad;
/* this is to silence the unused var warning */
dummy_ad.name = NULL;
#ifdef DO_KRB5
if ( SMBK5PWD_DO_KRB5( pi ) && oc_krb5KDCEntry == NULL ) {
krb5_error_code ret;
extern HDB *_kadm5_s_get_db(void *);
int i, rc;
/* Make sure all of our necessary schema items are loaded */
oc_krb5KDCEntry = oc_find( "krb5KDCEntry" );
if ( !oc_krb5KDCEntry ) {
Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
"unable to find \"krb5KDCEntry\" objectClass.\n",
0, 0, 0 );
return -1;
}
for ( i = 0; krb5_ad[ i ].name != NULL; i++ ) {
const char *text;
*(krb5_ad[ i ].adp) = NULL;
rc = slap_str2ad( krb5_ad[ i ].name, krb5_ad[ i ].adp, &text );
if ( rc != LDAP_SUCCESS ) {
Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
"unable to find \"%s\" attributeType: %s (%d).\n",
krb5_ad[ i ].name, text, rc );
oc_krb5KDCEntry = NULL;
return rc;
}
}
/* Initialize Kerberos context */
ret = krb5_init_context(&context);
if (ret) {
Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
"unable to initialize krb5 context (%d).\n",
ret, 0, 0 );
oc_krb5KDCEntry = NULL;
return -1;
}
ret = kadm5_s_init_with_password_ctx( context,
KADM5_ADMIN_SERVICE,
NULL,
KADM5_ADMIN_SERVICE,
&conf, 0, 0, &kadm_context );
if (ret) {
char *err_str, *err_msg = "<unknown error>";
err_str = krb5_get_error_string( context );
if (!err_str)
err_msg = (char *)krb5_get_err_text( context, ret );
Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
"unable to initialize krb5 admin context: %s (%d).\n",
err_str ? err_str : err_msg, ret, 0 );
if (err_str)
krb5_free_error_string( context, err_str );
krb5_free_context( context );
oc_krb5KDCEntry = NULL;
return -1;
}
db = _kadm5_s_get_db( kadm_context );
}
#endif /* DO_KRB5 */
#ifdef DO_SAMBA
if ( SMBK5PWD_DO_SAMBA( pi ) && oc_sambaSamAccount == NULL ) {
int i, rc;
oc_sambaSamAccount = oc_find( "sambaSamAccount" );
if ( !oc_sambaSamAccount ) {
Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
"unable to find \"sambaSamAccount\" objectClass.\n",
0, 0, 0 );
return -1;
}
for ( i = 0; samba_ad[ i ].name != NULL; i++ ) {
const char *text;
*(samba_ad[ i ].adp) = NULL;
rc = slap_str2ad( samba_ad[ i ].name, samba_ad[ i ].adp, &text );
if ( rc != LDAP_SUCCESS ) {
Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
"unable to find \"%s\" attributeType: %s (%d).\n",
samba_ad[ i ].name, text, rc );
oc_sambaSamAccount = NULL;
return rc;
}
}
}
#endif /* DO_SAMBA */
#ifdef DO_SHADOW
if ( SMBK5PWD_DO_SHADOW( pi ) && oc_shadowAccount == NULL ) {
int i, rc;
oc_shadowAccount = oc_find( "shadowAccount" );
if ( !oc_shadowAccount ) {
Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
"unable to find \"shadowAccount\" objectClass.\n",
0, 0, 0 );
return -1;
}
for ( i = 0; shadow_ad[ i ].name != NULL; i++ ) {
const char *text;
*(shadow_ad[ i ].adp) = NULL;
rc = slap_str2ad( shadow_ad[ i ].name, shadow_ad[ i ].adp, &text );
if ( rc != LDAP_SUCCESS ) {
Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
"unable to find \"%s\" attributeType: %s (%d).\n",
shadow_ad[ i ].name, text, rc );
oc_shadowAccount = NULL;
return rc;
}
}
}
#endif /* DO_SHADOW */
return 0;
}
static int
smbk5pwd_db_init(BackendDB *be, ConfigReply *cr)
{
slap_overinst *on = (slap_overinst *)be->bd_info;
smbk5pwd_t *pi;
pi = ch_calloc( 1, sizeof( smbk5pwd_t ) );
if ( pi == NULL ) {
return 1;
}
on->on_bi.bi_private = (void *)pi;
return 0;
}
static int
smbk5pwd_db_open(BackendDB *be, ConfigReply *cr)
{
slap_overinst *on = (slap_overinst *)be->bd_info;
smbk5pwd_t *pi = (smbk5pwd_t *)on->on_bi.bi_private;
int rc;
if ( pi->mode == 0 ) {
pi->mode = SMBK5PWD_F_ALL;
}
rc = smbk5pwd_modules_init( pi );
if ( rc ) {
return rc;
}
return 0;
}
static int
smbk5pwd_db_destroy(BackendDB *be, ConfigReply *cr)
{
slap_overinst *on = (slap_overinst *)be->bd_info;
smbk5pwd_t *pi = (smbk5pwd_t *)on->on_bi.bi_private;
if ( pi ) {
ch_free( pi );
}
return 0;
}
int
smbk5pwd_initialize(void)
{
int rc;
smbk5pwd.on_bi.bi_type = "smbk5pwd";
smbk5pwd.on_bi.bi_db_init = smbk5pwd_db_init;
smbk5pwd.on_bi.bi_db_open = smbk5pwd_db_open;
smbk5pwd.on_bi.bi_db_destroy = smbk5pwd_db_destroy;
smbk5pwd.on_bi.bi_extended = smbk5pwd_exop_passwd;
#ifdef DO_KRB5
smbk5pwd.on_bi.bi_op_bind = smbk5pwd_op_bind;
lutil_passwd_add( (struct berval *)&k5key_scheme, k5key_chk, k5key_hash );
#endif
smbk5pwd.on_bi.bi_cf_ocs = smbk5pwd_cfocs;
rc = config_register_schema( smbk5pwd_cfats, smbk5pwd_cfocs );
if ( rc ) {
return rc;
}
return overlay_register( &smbk5pwd );
}
#if SLAPD_OVER_SMBK5PWD == SLAPD_MOD_DYNAMIC
int init_module(int argc, char *argv[]) {
return smbk5pwd_initialize();
}
#endif
#endif /* defined(SLAPD_OVER_SMBK5PWD) */
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