]> git.sur5r.net Git - openldap/blobdiff - contrib/slapd-modules/smbk5pwd/smbk5pwd.c
Fix bogus whitespace
[openldap] / contrib / slapd-modules / smbk5pwd / smbk5pwd.c
index e82a73e445a4fab9134c1d67469df29ed8f07c0a..38b8b47102d00e19aab9a32bd380602307c47f43 100644 (file)
  * top-level directory of the distribution or, alternatively, at
  * <http://www.OpenLDAP.org/license.html>.
  */
+/*
+ * Support for table-driven configuration added by Pierangelo Masarati.
+ * Support for sambaPwdMustChange and sambaPwdCanChange added by Marco D'Ettorre.
+ *
+ * The conditions of the OpenLDAP Public License apply.
+ */
 
 #include <portable.h>
 
 
 #include <slap.h>
 #include <ac/errno.h>
+#include <ac/string.h>
+
+#include "config.h"
 
 #ifdef DO_KRB5
-#include <ac/string.h>
 #include <lber.h>
 #include <lber_pvt.h>
 #include <lutil.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;
@@ -51,39 +65,71 @@ static ObjectClass *oc_krb5KDCEntry;
 #ifdef DO_SAMBA
 #include <openssl/des.h>
 #include <openssl/md4.h>
+#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
 
-#if 0
-static void smbk5pwd_destroy() {
-       kadm5_destroy(kadm_context);
-       krb5_free_context(context);
-}
+/* Per-instance configuration information */
+typedef struct smbk5pwd_t {
+       unsigned        mode;
+#define        SMBK5PWD_F_KRB5         (0x1U)
+#define        SMBK5PWD_F_SAMBA        (0x2U)
+
+#define SMBK5PWD_DO_KRB5(pi)   ((pi)->mode & SMBK5PWD_F_KRB5)
+#define SMBK5PWD_DO_SAMBA(pi)  ((pi)->mode & SMBK5PWD_F_SAMBA)
+
+#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
+} smbk5pwd_t;
+
+static const unsigned SMBK5PWD_F_ALL   =
+       0
+#ifdef DO_KRB5
+       | SMBK5PWD_F_KRB5
+#endif
+#ifdef DO_SAMBA
+       | SMBK5PWD_F_SAMBA
+#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 unsigned char *lmPasswd,
-        des_cblock *key)
+       const char *lmPasswd,
+       des_cblock *key)
 {
-        /* make room for parity bits */
-        ((char *)key)[0] = lmPasswd[0];
-        ((char *)key)[1] = ((lmPasswd[0]&0x01)<<7) | (lmPasswd[1]>>1);
-        ((char *)key)[2] = ((lmPasswd[1]&0x03)<<6) | (lmPasswd[2]>>2);
-        ((char *)key)[3] = ((lmPasswd[2]&0x07)<<5) | (lmPasswd[3]>>3);
-        ((char *)key)[4] = ((lmPasswd[3]&0x0F)<<4) | (lmPasswd[4]>>4);
-        ((char *)key)[5] = ((lmPasswd[4]&0x1F)<<3) | (lmPasswd[5]>>5);
-        ((char *)key)[6] = ((lmPasswd[5]&0x3F)<<2) | (lmPasswd[6]>>6);
-        ((char *)key)[7] = ((lmPasswd[6]&0x7F)<<1);
-
-        des_set_odd_parity( 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);
+
+       des_set_odd_parity( key );
 }
 
 #define MAX_PWLEN 256
@@ -115,23 +161,23 @@ static void lmhash(
        struct berval *hash
 )
 {
-        char UcasePassword[15];
-        des_cblock key;
-        des_key_schedule schedule;
-        des_cblock StdText = "KGS!@#$%";
+       char UcasePassword[15];
+       des_cblock key;
+       des_key_schedule schedule;
+       des_cblock StdText = "KGS!@#$%";
        des_cblock hbuf[2];
 
-        strncpy( UcasePassword, passwd->bv_val, 14 );
-        UcasePassword[14] = '\0';
-        ldap_pvt_str2upper( UcasePassword );
+       strncpy( UcasePassword, passwd->bv_val, 14 );
+       UcasePassword[14] = '\0';
+       ldap_pvt_str2upper( UcasePassword );
 
-        lmPasswd_to_key( UcasePassword, &key );
-        des_set_key_unchecked( &key, schedule );
-        des_ecb_encrypt( &StdText, &hbuf[0], schedule , DES_ENCRYPT );
+       lmPasswd_to_key( UcasePassword, &key );
+       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 );
+       lmPasswd_to_key( &UcasePassword[7], &key );
+       des_set_key_unchecked( &key, schedule );
+       des_ecb_encrypt( &StdText, &hbuf[1], schedule , DES_ENCRYPT );
 
        hexify( (char *)hbuf, hash );
 }
@@ -141,20 +187,19 @@ static void nthash(
        struct berval *hash
 )
 {
-        /* Windows currently only allows 14 character passwords, but
-         * may support up to 256 in the future. We assume this means
+       /* 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];
-        int i;
-        MD4_CTX ctx;
+       MD4_CTX ctx;
 
        if (passwd->bv_len > MAX_PWLEN*2)
                passwd->bv_len = MAX_PWLEN*2;
                
-        MD4_Init( &ctx );
-        MD4_Update( &ctx, passwd->bv_val, passwd->bv_len );
-        MD4_Final( hbuf, &ctx );
+       MD4_Init( &ctx );
+       MD4_Update( &ctx, passwd->bv_val, passwd->bv_len );
+       MD4_Final( (unsigned char *)hbuf, &ctx );
 
        hexify( hbuf, hash );
 }
@@ -170,7 +215,7 @@ static int smbk5pwd_op_cleanup(
 
        /* clear out the current key */
        ldap_pvt_thread_pool_setkey( op->o_threadctx, smbk5pwd_op_cleanup,
-               NULL, NULL );
+               NULL, 0, NULL, NULL );
 
        /* free the callback */
        cb = op->o_callback;
@@ -189,8 +234,8 @@ static int smbk5pwd_op_bind(
         */
        if ( op->oq_bind.rb_method == LDAP_AUTH_SIMPLE ) {
                slap_callback *cb;
-               ldap_pvt_thread_pool_setkey( op->o_threadctx, smbk5pwd_op_cleanup, op,
-                       NULL );
+               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;
@@ -199,8 +244,9 @@ static int smbk5pwd_op_bind(
        return SLAP_CB_CONTINUE;
 }
 
-static LUTIL_PASSWD_CHK_FUNC chk_k5key;
-static const struct berval scheme = BER_BVC("{K5KEY}");
+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
@@ -216,13 +262,13 @@ static const struct berval scheme = BER_BVC("{K5KEY}");
  * storage so we can retrieve it here. The Operation provides all
  * the necessary context for us to get Entry from the database.
  */
-static int chk_k5key(
+static int k5key_chk(
        const struct berval *sc,
        const struct berval *passwd,
        const struct berval *cred,
        const char **text )
 {
-       void *ctx;
+       void *ctx, *op_tmp;
        Operation *op;
        int rc;
        Entry *e;
@@ -235,9 +281,10 @@ static int chk_k5key(
        /* Find our thread context, find our Operation */
        ctx = ldap_pvt_thread_pool_context();
 
-       if ( ldap_pvt_thread_pool_getkey( ctx, smbk5pwd_op_cleanup, (void **)&op, NULL ) ||
-               !op )
+       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;
@@ -263,7 +310,7 @@ static int chk_k5key(
                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->master_key_set )
+               if ( db->HDB_MASTER_KEY_SET )
                        hdb_unseal_keys( context, db, &ent );
 
                krb5_string_to_key_salt( context, ekey.key.keytype, cred->bv_val,
@@ -281,18 +328,28 @@ static int chk_k5key(
        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 i, rc;
+       int rc;
        req_pwdexop_s *qpw = &op->oq_pwdexop;
        Entry *e;
-       Attribute *a;
        Modifications *ml;
        slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
+       smbk5pwd_t *pi = on->on_bi.bi_private;
 
        /* Not the operation we expected, pass it on... */
        if ( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) ) {
@@ -309,7 +366,10 @@ static int smbk5pwd_exop_passwd(
                krb5_error_code ret;
                hdb_entry ent;
                struct berval *keys;
-               int kvno;
+               int kvno, i;
+               Attribute *a;
+
+               if ( !SMBK5PWD_DO_KRB5( pi ) ) break;
 
                if ( !is_entry_objectclass(e, oc_krb5KDCEntry, 0 ) ) break;
 
@@ -321,11 +381,19 @@ static int smbk5pwd_exop_passwd(
                if ( ret ) break;
 
                a = attr_find( e->e_attrs, ad_krb5KeyVersionNumber );
+               kvno = 0;
                if ( a ) {
-                       kvno = atoi(a->a_vals[0].bv_val);
+                       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 */
-                       kvno = 0;
+                       Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: "
+                               "dn=\"%s\" missing krb5KeyVersionNumber\n",
+                               op->o_log_prefix, e->e_name.bv_val, 0 );
                }
 
                ret = _kadm5_set_keys(kadm_context, &ent, qpw->rs_new.bv_val);
@@ -342,11 +410,10 @@ static int smbk5pwd_exop_passwd(
                        if (ret != 0)
                                break;
                        
-                       keys[i].bv_val = buf;
+                       keys[i].bv_val = (char *)buf;
                        keys[i].bv_len = len;
                }
-               keys[i].bv_val = NULL;
-               keys[i].bv_len = 0;
+               BER_BVZERO( &keys[i] );
 
                _kadm5_free_keys(kadm_context, ent.keys.len, ent.keys.val);
 
@@ -362,6 +429,10 @@ static int smbk5pwd_exop_passwd(
 
                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;
                
@@ -371,19 +442,22 @@ static int smbk5pwd_exop_passwd(
                
                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 );
-               ml->sml_values[1].bv_val = NULL;
-               ml->sml_values[1].bv_len = 0;
+               BER_BVZERO( &ml->sml_values[1] );
                ml->sml_nvalues = NULL;
-       } while(0);
+       } while ( 0 );
 #endif /* DO_KRB5 */
 
 #ifdef DO_SAMBA
        /* Samba stuff */
-       if ( is_entry_objectclass(e, oc_sambaSamAccount, 0 ) ) {
+       if ( SMBK5PWD_DO_SAMBA( pi ) && is_entry_objectclass(e, oc_sambaSamAccount, 0 ) ) {
                struct berval *keys;
                ber_len_t j,l;
                wchar_t *wcs, wc;
@@ -413,12 +487,15 @@ static int smbk5pwd_exop_passwd(
                qpw->rs_mods = ml;
 
                keys = ch_malloc( 2 * sizeof(struct berval) );
-               keys[1].bv_val = NULL;
-               keys[1].bv_len = 0;
+               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;
 
@@ -429,18 +506,23 @@ static int smbk5pwd_exop_passwd(
                        *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) );
-               keys[1].bv_val = NULL;
-               keys[1].bv_len = 0;
+               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;
 
@@ -451,16 +533,66 @@ static int smbk5pwd_exop_passwd(
                qpw->rs_mods = ml;
 
                keys = ch_malloc( 2 * sizeof(struct berval) );
-               keys[1].bv_val = NULL;
-               keys[1].bv_len = 0;
-               keys[0].bv_val = ch_malloc(16);
-               keys[0].bv_len = sprintf(keys[0].bv_val, "%d",
-                       slap_get_time());
+               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 */
        be_entry_release_r( op, e );
@@ -470,67 +602,434 @@ static int smbk5pwd_exop_passwd(
 
 static slap_overinst smbk5pwd;
 
-int smbk5pwd_init() {
-       int rc;
-       const char *text;
+/* back-config stuff */
+enum {
+       PC_SMB_MUST_CHANGE = 1,
+       PC_SMB_CAN_CHANGE,
+       PC_SMB_ENABLE
+};
 
-#ifdef DO_KRB5
-       krb5_error_code ret;
-       extern HDB * _kadm5_s_get_db(void *);
-
-       /* Make sure all of our necessary schema items are loaded */
-       oc_krb5KDCEntry = oc_find("krb5KDCEntry");
-       if ( !oc_krb5KDCEntry ) return -1;
-
-       rc = slap_str2ad( "krb5Key", &ad_krb5Key, &text );
-       if ( rc ) return rc;
-       rc = slap_str2ad( "krb5KeyVersionNumber", &ad_krb5KeyVersionNumber, &text );
-       if ( rc ) return rc;
-       rc = slap_str2ad( "krb5PrincipalName", &ad_krb5PrincipalName, &text );
-       if ( rc ) return rc;
-
-       /* Initialize Kerberos context */
-       ret = krb5_init_context(&context);
-       if (ret) {
-               return -1;
+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_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 {
+                               slap_mask_t     m;
+
+                               m = verb_to_mask( c->line, smbk5pwd_modules );
+                               pi->mode &= ~m;
+                       }
+                       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;
+
+               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 */
+
+               {
+                       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;
+}
 
-       ret = kadm5_s_init_with_password_ctx( context,
-               KADM5_ADMIN_SERVICE,
-               NULL,
-               KADM5_ADMIN_SERVICE,
-               &conf, 0, 0, &kadm_context );
-       
-       db = _kadm5_s_get_db(kadm_context);
+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 },
+               { 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 */
+       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 = 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
-       oc_sambaSamAccount = oc_find("sambaSamAccount");
-       if ( !oc_sambaSamAccount ) return -1;
-
-       rc = slap_str2ad( "sambaLMPassword", &ad_sambaLMPassword, &text );
-       if ( rc ) return rc;
-       rc = slap_str2ad( "sambaNTPassword", &ad_sambaNTPassword, &text );
-       if ( rc ) return rc;
-       rc = slap_str2ad( "sambaPwdLastSet", &ad_sambaPwdLastSet, &text );
-       if ( rc ) return rc;
+       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 */
 
+       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_extended = smbk5pwd_exop_passwd;
 
+       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 *)&scheme, chk_k5key, NULL );
+       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_init();
+       return smbk5pwd_initialize();
 }
 #endif