git.sur5r.net Git - openldap/blob - libraries/liblutil/passwd.c

   1 /* $OpenLDAP$ */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2003 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16
  17 /*
  18  * int lutil_passwd(
  19  *      const struct berval *passwd,
  20  *      const struct berval *cred,
  21  *      const char **schemes )
  22  *
  23  * Returns true if user supplied credentials (cred) matches
  24  * the stored password (passwd).
  25  *
  26  * Due to the use of the crypt(3) function
  27  * this routine is NOT thread-safe.
  28  */
  29
  30 #include "portable.h"
  31
  32 #include <stdio.h>
  33 #include <ac/stdlib.h>
  34 #include <ac/string.h>
  35 #include <ac/unistd.h>
  36
  37 #ifdef SLAPD_SPASSWD
  38 #       ifdef HAVE_SASL_SASL_H
  39 #               include <sasl/sasl.h>
  40 #       else
  41 #               include <sasl.h>
  42 #       endif
  43 #endif
  44
  45 #ifdef SLAPD_KPASSWD
  46 #       include <ac/krb.h>
  47 #       include <ac/krb5.h>
  48 #endif
  49
  50 /* KPASSWD/krb.h brings in a conflicting des.h so don't use both.
  51  * configure currently requires OpenSSL to enable LMHASH. Obviously
  52  * this requirement can be fulfilled by the KRB DES library as well.
  53  */
  54 #if defined(SLAPD_LMHASH) && !defined(DES_ENCRYPT)
  55 #       include <openssl/des.h>
  56 #endif /* SLAPD_LMHASH */
  57
  58 #include <ac/param.h>
  59
  60 #ifdef SLAPD_CRYPT
  61 # include <ac/crypt.h>
  62
  63 # if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
  64 #  ifdef HAVE_SHADOW_H
  65 #       include <shadow.h>
  66 #  endif
  67 #  ifdef HAVE_PWD_H
  68 #       include <pwd.h>
  69 #  endif
  70 #  ifdef HAVE_AIX_SECURITY
  71 #       include <userpw.h>
  72 #  endif
  73 # endif
  74 #endif
  75
  76 #include <lber.h>
  77
  78 #include "ldap_pvt.h"
  79 #include "lber_pvt.h"
  80
  81 #include "lutil_md5.h"
  82 #include "lutil_sha1.h"
  83 #include "lutil.h"
  84
  85 static const unsigned char crypt64[] =
  86         "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890./";
  87
  88 #ifdef SLAPD_CRYPT
  89 static char *salt_format = NULL;
  90 #endif
  91
  92 struct pw_scheme {
  93         struct berval name;
  94         LUTIL_PASSWD_CHK_FUNC *chk_fn;
  95         LUTIL_PASSWD_HASH_FUNC *hash_fn;
  96 };
  97
  98 struct pw_slist {
  99         struct pw_slist *next;
 100         struct pw_scheme s;
 101 };
 102
 103 /* password check routines */
 104
 105 static LUTIL_PASSWD_CHK_FUNC chk_md5;
 106 static LUTIL_PASSWD_CHK_FUNC chk_smd5;
 107 static LUTIL_PASSWD_HASH_FUNC hash_smd5;
 108 static LUTIL_PASSWD_HASH_FUNC hash_md5;
 109
 110
 111 #ifdef LUTIL_SHA1_BYTES
 112 static LUTIL_PASSWD_CHK_FUNC chk_ssha1;
 113 static LUTIL_PASSWD_CHK_FUNC chk_sha1;
 114 static LUTIL_PASSWD_HASH_FUNC hash_sha1;
 115 static LUTIL_PASSWD_HASH_FUNC hash_ssha1;
 116 #endif
 117
 118 #ifdef SLAPD_LMHASH
 119 static LUTIL_PASSWD_CHK_FUNC chk_lanman;
 120 static LUTIL_PASSWD_HASH_FUNC hash_lanman;
 121 #endif
 122
 123 #ifdef SLAPD_NS_MTA_MD5
 124 static LUTIL_PASSWD_CHK_FUNC chk_ns_mta_md5;
 125 #endif
 126
 127 #ifdef SLAPD_SPASSWD
 128 static LUTIL_PASSWD_CHK_FUNC chk_sasl;
 129 #endif
 130
 131 #ifdef SLAPD_KPASSWD
 132 static LUTIL_PASSWD_CHK_FUNC chk_kerberos;
 133 #endif
 134
 135 #ifdef SLAPD_CRYPT
 136 static LUTIL_PASSWD_CHK_FUNC chk_crypt;
 137 static LUTIL_PASSWD_HASH_FUNC hash_crypt;
 138
 139 #if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
 140 static LUTIL_PASSWD_CHK_FUNC chk_unix;
 141 #endif
 142 #endif
 143
 144 /* password hash routines */
 145
 146 #ifdef SLAPD_CLEARTEXT
 147 static LUTIL_PASSWD_HASH_FUNC hash_clear;
 148 #endif
 149
 150 static struct pw_slist *pw_schemes;
 151
 152 static const struct pw_scheme pw_schemes_default[] =
 153 {
 154 #ifdef LUTIL_SHA1_BYTES
 155         { BER_BVC("{SSHA}"),            chk_ssha1, hash_ssha1 },
 156         { BER_BVC("{SHA}"),                     chk_sha1, hash_sha1 },
 157 #endif
 158
 159         { BER_BVC("{SMD5}"),            chk_smd5, hash_smd5 },
 160         { BER_BVC("{MD5}"),                     chk_md5, hash_md5 },
 161
 162 #ifdef SLAPD_LMHASH
 163         { BER_BVC("{LANMAN}"),          chk_lanman, hash_lanman },
 164 #endif /* SLAPD_LMHASH */
 165
 166 #ifdef SLAPD_NS_MTA_MD5
 167         { BER_BVC("{NS-MTA-MD5}"),      chk_ns_mta_md5, NULL },
 168 #endif /* SLAPD_NS_MTA_MD5 */
 169
 170 #ifdef SLAPD_SPASSWD
 171         { BER_BVC("{SASL}"),            chk_sasl, NULL },
 172 #endif
 173
 174 #ifdef SLAPD_KPASSWD
 175         { BER_BVC("{KERBEROS}"),        chk_kerberos, NULL },
 176 #endif
 177
 178 #ifdef SLAPD_CRYPT
 179         { BER_BVC("{CRYPT}"),           chk_crypt, hash_crypt },
 180 # if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
 181         { BER_BVC("{UNIX}"),            chk_unix, NULL },
 182 # endif
 183 #endif
 184
 185 #ifdef SLAPD_CLEARTEXT
 186         /* pseudo scheme */
 187         { {0, "{CLEARTEXT}"},           NULL, hash_clear },
 188 #endif
 189
 190         { BER_BVNULL, NULL, NULL }
 191 };
 192
 193 int lutil_passwd_add(
 194         struct berval *scheme,
 195         LUTIL_PASSWD_CHK_FUNC *chk,
 196         LUTIL_PASSWD_HASH_FUNC *hash )
 197 {
 198         struct pw_slist *ptr;
 199
 200         ptr = ber_memalloc( sizeof( struct pw_slist ));
 201         if (!ptr) return -1;
 202         ptr->next = pw_schemes;
 203         ptr->s.name = *scheme;
 204         ptr->s.chk_fn = chk;
 205         ptr->s.hash_fn = hash;
 206         pw_schemes = ptr;
 207         return 0;
 208 }
 209
 210 void lutil_passwd_init()
 211 {
 212         struct pw_slist *ptr;
 213         struct pw_scheme *s;
 214
 215         for( s=(struct pw_scheme *)pw_schemes_default; s->name.bv_val; s++) {
 216                 if ( lutil_passwd_add( &s->name, s->chk_fn, s->hash_fn )) break;
 217         }
 218 }
 219
 220 void lutil_passwd_destroy()
 221 {
 222         struct pw_slist *ptr, *next;
 223
 224         for( ptr=pw_schemes; ptr; ptr=next ) {
 225                 next = ptr->next;
 226                 ber_memfree( ptr );
 227         }
 228 }
 229
 230 static const struct pw_scheme *get_scheme(
 231         const char* scheme )
 232 {
 233         struct pw_slist *pws;
 234
 235         if (!pw_schemes) lutil_passwd_init();
 236
 237         for( pws=pw_schemes; pws; pws=pws->next ) {
 238                 if( strcasecmp(scheme, pws->s.name.bv_val ) == 0 ) {
 239                         return &(pws->s);
 240                 }
 241         }
 242
 243         return NULL;
 244 }
 245
 246 int lutil_passwd_scheme(
 247         const char* scheme )
 248 {
 249         if( scheme == NULL ) {
 250                 return 0;
 251         }
 252
 253         return get_scheme(scheme) != NULL;
 254 }
 255
 256
 257 static int is_allowed_scheme(
 258         const char* scheme,
 259         const char** schemes )
 260 {
 261         int i;
 262
 263         if( schemes == NULL ) return 1;
 264
 265         for( i=0; schemes[i] != NULL; i++ ) {
 266                 if( strcasecmp( scheme, schemes[i] ) == 0 ) {
 267                         return 1;
 268                 }
 269         }
 270         return 0;
 271 }
 272
 273 static struct berval *passwd_scheme(
 274         const struct pw_scheme *scheme,
 275         const struct berval * passwd,
 276         struct berval *bv,
 277         const char** allowed )
 278 {
 279         if( !is_allowed_scheme( scheme->name.bv_val, allowed ) ) {
 280                 return NULL;
 281         }
 282
 283         if( passwd->bv_len >= scheme->name.bv_len ) {
 284                 if( strncasecmp( passwd->bv_val, scheme->name.bv_val, scheme->name.bv_len ) == 0 ) {
 285                         bv->bv_val = &passwd->bv_val[scheme->name.bv_len];
 286                         bv->bv_len = passwd->bv_len - scheme->name.bv_len;
 287
 288                         return bv;
 289                 }
 290         }
 291
 292         return NULL;
 293 }
 294
 295 /*
 296  * Return 0 if creds are good.
 297  */
 298 int
 299 lutil_passwd(
 300         const struct berval *passwd,    /* stored passwd */
 301         const struct berval *cred,              /* user cred */
 302         const char **schemes,
 303         const char **text )
 304 {
 305         struct pw_slist *pws;
 306
 307         if ( text ) *text = NULL;
 308
 309         if (cred == NULL || cred->bv_len == 0 ||
 310                 passwd == NULL || passwd->bv_len == 0 )
 311         {
 312                 return -1;
 313         }
 314
 315         if (!pw_schemes) lutil_passwd_init();
 316
 317         for( pws=pw_schemes; pws; pws=pws->next ) {
 318                 if( pws->s.chk_fn ) {
 319                         struct berval x;
 320                         struct berval *p = passwd_scheme( &(pws->s),
 321                                 passwd, &x, schemes );
 322
 323                         if( p != NULL ) {
 324                                 return (pws->s.chk_fn)( &(pws->s.name), p, cred, text );
 325                         }
 326                 }
 327         }
 328
 329 #ifdef SLAPD_CLEARTEXT
 330         if( is_allowed_scheme("{CLEARTEXT}", schemes ) ) {
 331                 return (( passwd->bv_len == cred->bv_len ) &&
 332                                 ( passwd->bv_val[0] != '{' /*'}'*/ ))
 333                         ? memcmp( passwd->bv_val, cred->bv_val, passwd->bv_len )
 334                         : 1;
 335         }
 336 #endif
 337         return 1;
 338 }
 339
 340 struct berval * lutil_passwd_generate( ber_len_t len )
 341 {
 342         struct berval *pw;
 343
 344         if( len < 1 ) return NULL;
 345
 346         pw = ber_memalloc( sizeof( struct berval ) );
 347         if( pw == NULL ) return NULL;
 348
 349         pw->bv_len = len;
 350         pw->bv_val = ber_memalloc( len + 1 );
 351
 352         if( pw->bv_val == NULL ) {
 353                 ber_memfree( pw );
 354                 return NULL;
 355         }
 356
 357         if( lutil_entropy( (unsigned char *) pw->bv_val, pw->bv_len) < 0 ) {
 358                 ber_bvfree( pw );
 359                 return NULL;
 360         }
 361
 362         for( len = 0; len < pw->bv_len; len++ ) {
 363                 pw->bv_val[len] = crypt64[
 364                         pw->bv_val[len] % (sizeof(crypt64)-1) ];
 365         }
 366
 367         pw->bv_val[len] = '\0';
 368
 369         return pw;
 370 }
 371
 372 struct berval * lutil_passwd_hash(
 373         const struct berval * passwd,
 374         const char * method,
 375         const char **text )
 376 {
 377         const struct pw_scheme *sc = get_scheme( method );
 378
 379         if( text ) *text = NULL;
 380         if( sc == NULL ) return NULL;
 381         if( ! sc->hash_fn ) return NULL;
 382
 383         return (sc->hash_fn)( &sc->name, passwd, text );
 384 }
 385
 386 /* pw_string is only called when SLAPD_LMHASH or SLAPD_CRYPT is defined */
 387 #if defined(SLAPD_LMHASH) || defined(SLAPD_CRYPT)
 388 static struct berval * pw_string(
 389         const struct berval *sc,
 390         const struct berval *passwd )
 391 {
 392         struct berval *pw = ber_memalloc( sizeof( struct berval ) );
 393         if( pw == NULL ) return NULL;
 394
 395         pw->bv_len = sc->bv_len + passwd->bv_len;
 396         pw->bv_val = ber_memalloc( pw->bv_len + 1 );
 397
 398         if( pw->bv_val == NULL ) {
 399                 ber_memfree( pw );
 400                 return NULL;
 401         }
 402
 403         AC_MEMCPY( pw->bv_val, sc->bv_val, sc->bv_len );
 404         AC_MEMCPY( &pw->bv_val[sc->bv_len], passwd->bv_val, passwd->bv_len );
 405
 406         pw->bv_val[pw->bv_len] = '\0';
 407         return pw;
 408 }
 409 #endif /* SLAPD_LMHASH || SLAPD_CRYPT */
 410
 411 static struct berval * pw_string64(
 412         const struct berval *sc,
 413         const struct berval *hash,
 414         const struct berval *salt )
 415 {
 416         int rc;
 417         struct berval string;
 418         struct berval *b64 = ber_memalloc( sizeof(struct berval) );
 419         size_t b64len;
 420
 421         if( b64 == NULL ) return NULL;
 422
 423         if( salt ) {
 424                 /* need to base64 combined string */
 425                 string.bv_len = hash->bv_len + salt->bv_len;
 426                 string.bv_val = ber_memalloc( string.bv_len + 1 );
 427
 428                 if( string.bv_val == NULL ) {
 429                         ber_memfree( b64 );
 430                         return NULL;
 431                 }
 432
 433                 AC_MEMCPY( string.bv_val, hash->bv_val,
 434                         hash->bv_len );
 435                 AC_MEMCPY( &string.bv_val[hash->bv_len], salt->bv_val,
 436                         salt->bv_len );
 437                 string.bv_val[string.bv_len] = '\0';
 438
 439         } else {
 440                 string = *hash;
 441         }
 442
 443         b64len = LUTIL_BASE64_ENCODE_LEN( string.bv_len ) + 1;
 444         b64->bv_len = b64len + sc->bv_len;
 445         b64->bv_val = ber_memalloc( b64->bv_len + 1 );
 446
 447         if( b64->bv_val == NULL ) {
 448                 if( salt ) ber_memfree( string.bv_val );
 449                 ber_memfree( b64 );
 450                 return NULL;
 451         }
 452
 453         AC_MEMCPY(b64->bv_val, sc->bv_val, sc->bv_len);
 454
 455         rc = lutil_b64_ntop(
 456                 (unsigned char *) string.bv_val, string.bv_len,
 457                 &b64->bv_val[sc->bv_len], b64len );
 458
 459         if( salt ) ber_memfree( string.bv_val );
 460
 461         if( rc < 0 ) {
 462                 ber_bvfree( b64 );
 463                 return NULL;
 464         }
 465
 466         /* recompute length */
 467         b64->bv_len = sc->bv_len + rc;
 468         assert( strlen(b64->bv_val) == b64->bv_len );
 469         return b64;
 470 }
 471
 472 /* PASSWORD CHECK ROUTINES */
 473
 474 #ifdef LUTIL_SHA1_BYTES
 475 static int chk_ssha1(
 476         const struct berval *sc,
 477         const struct berval * passwd,
 478         const struct berval * cred,
 479         const char **text )
 480 {
 481         lutil_SHA1_CTX SHA1context;
 482         unsigned char SHA1digest[LUTIL_SHA1_BYTES];
 483         int rc;
 484         unsigned char *orig_pass = NULL;
 485
 486         /* safety check */
 487         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <= sizeof(SHA1digest)) {
 488                 return -1;
 489         }
 490
 491         /* decode base64 password */
 492         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 493                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 494
 495         if( orig_pass == NULL ) return -1;
 496
 497         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 498
 499         if (rc < 0 || (unsigned)rc <= sizeof(SHA1digest)) {
 500                 ber_memfree(orig_pass);
 501                 return -1;
 502         }
 503
 504         /* hash credentials with salt */
 505         lutil_SHA1Init(&SHA1context);
 506         lutil_SHA1Update(&SHA1context,
 507                 (const unsigned char *) cred->bv_val, cred->bv_len);
 508         lutil_SHA1Update(&SHA1context,
 509                 (const unsigned char *) &orig_pass[sizeof(SHA1digest)],
 510                 rc - sizeof(SHA1digest));
 511         lutil_SHA1Final(SHA1digest, &SHA1context);
 512
 513         /* compare */
 514         rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
 515         ber_memfree(orig_pass);
 516         return rc ? 1 : 0;
 517 }
 518
 519 static int chk_sha1(
 520         const struct berval *sc,
 521         const struct berval * passwd,
 522         const struct berval * cred,
 523         const char **text )
 524 {
 525         lutil_SHA1_CTX SHA1context;
 526         unsigned char SHA1digest[LUTIL_SHA1_BYTES];
 527         int rc;
 528         unsigned char *orig_pass = NULL;
 529
 530         /* base64 un-encode password */
 531         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 532                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 533
 534         if( orig_pass == NULL ) return -1;
 535
 536         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 537
 538         if( rc != sizeof(SHA1digest) ) {
 539                 ber_memfree(orig_pass);
 540                 return -1;
 541         }
 542
 543         /* hash credentials with salt */
 544         lutil_SHA1Init(&SHA1context);
 545         lutil_SHA1Update(&SHA1context,
 546                 (const unsigned char *) cred->bv_val, cred->bv_len);
 547         lutil_SHA1Final(SHA1digest, &SHA1context);
 548
 549         /* compare */
 550         rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
 551         ber_memfree(orig_pass);
 552         return rc ? 1 : 0;
 553 }
 554 #endif
 555
 556 static int chk_smd5(
 557         const struct berval *sc,
 558         const struct berval * passwd,
 559         const struct berval * cred,
 560         const char **text )
 561 {
 562         lutil_MD5_CTX MD5context;
 563         unsigned char MD5digest[LUTIL_MD5_BYTES];
 564         int rc;
 565         unsigned char *orig_pass = NULL;
 566
 567         /* safety check */
 568         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <= sizeof(MD5digest)) {
 569                 return -1;
 570         }
 571
 572         /* base64 un-encode password */
 573         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 574                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 575
 576         if( orig_pass == NULL ) return -1;
 577
 578         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 579
 580         if (rc < 0 || (unsigned)rc <= sizeof(MD5digest)) {
 581                 ber_memfree(orig_pass);
 582                 return -1;
 583         }
 584
 585         /* hash credentials with salt */
 586         lutil_MD5Init(&MD5context);
 587         lutil_MD5Update(&MD5context,
 588                 (const unsigned char *) cred->bv_val,
 589                 cred->bv_len );
 590         lutil_MD5Update(&MD5context,
 591                 &orig_pass[sizeof(MD5digest)],
 592                 rc - sizeof(MD5digest));
 593         lutil_MD5Final(MD5digest, &MD5context);
 594
 595         /* compare */
 596         rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
 597         ber_memfree(orig_pass);
 598         return rc ? 1 : 0;
 599 }
 600
 601 static int chk_md5(
 602         const struct berval *sc,
 603         const struct berval * passwd,
 604         const struct berval * cred,
 605         const char **text )
 606 {
 607         lutil_MD5_CTX MD5context;
 608         unsigned char MD5digest[LUTIL_MD5_BYTES];
 609         int rc;
 610         unsigned char *orig_pass = NULL;
 611
 612         /* base64 un-encode password */
 613         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 614                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 615
 616         if( orig_pass == NULL ) return -1;
 617
 618         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 619         if ( rc != sizeof(MD5digest) ) {
 620                 ber_memfree(orig_pass);
 621                 return -1;
 622         }
 623
 624         /* hash credentials with salt */
 625         lutil_MD5Init(&MD5context);
 626         lutil_MD5Update(&MD5context,
 627                 (const unsigned char *) cred->bv_val,
 628                 cred->bv_len );
 629         lutil_MD5Final(MD5digest, &MD5context);
 630
 631         /* compare */
 632         rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
 633         ber_memfree(orig_pass);
 634         return rc ? 1 : 0;
 635 }
 636
 637 #ifdef SLAPD_LMHASH
 638 /* pseudocode from RFC2433
 639  * A.2 LmPasswordHash()
 640  *
 641  *    LmPasswordHash(
 642  *    IN  0-to-14-oem-char Password,
 643  *    OUT 16-octet         PasswordHash )
 644  *    {
 645  *       Set UcasePassword to the uppercased Password
 646  *       Zero pad UcasePassword to 14 characters
 647  *
 648  *       DesHash( 1st 7-octets of UcasePassword,
 649  *                giving 1st 8-octets of PasswordHash )
 650  *
 651  *       DesHash( 2nd 7-octets of UcasePassword,
 652  *                giving 2nd 8-octets of PasswordHash )
 653  *    }
 654  *
 655  *
 656  * A.3 DesHash()
 657  *
 658  *    DesHash(
 659  *    IN  7-octet Clear,
 660  *    OUT 8-octet Cypher )
 661  *    {
 662  *        *
 663  *        * Make Cypher an irreversibly encrypted form of Clear by
 664  *        * encrypting known text using Clear as the secret key.
 665  *        * The known text consists of the string
 666  *        *
 667  *        *              KGS!@#$%
 668  *        *
 669  *
 670  *       Set StdText to "KGS!@#$%"
 671  *       DesEncrypt( StdText, Clear, giving Cypher )
 672  *    }
 673  *
 674  *
 675  * A.4 DesEncrypt()
 676  *
 677  *    DesEncrypt(
 678  *    IN  8-octet Clear,
 679  *    IN  7-octet Key,
 680  *    OUT 8-octet Cypher )
 681  *    {
 682  *        *
 683  *        * Use the DES encryption algorithm [4] in ECB mode [9]
 684  *        * to encrypt Clear into Cypher such that Cypher can
 685  *        * only be decrypted back to Clear by providing Key.
 686  *        * Note that the DES algorithm takes as input a 64-bit
 687  *        * stream where the 8th, 16th, 24th, etc.  bits are
 688  *        * parity bits ignored by the encrypting algorithm.
 689  *        * Unless you write your own DES to accept 56-bit input
 690  *        * without parity, you will need to insert the parity bits
 691  *        * yourself.
 692  *        *
 693  *    }
 694  */
 695
 696 static void lmPasswd_to_key(
 697         const unsigned char *lmPasswd,
 698         des_cblock *key)
 699 {
 700         /* make room for parity bits */
 701         ((char *)key)[0] = lmPasswd[0];
 702         ((char *)key)[1] = ((lmPasswd[0]&0x01)<<7) | (lmPasswd[1]>>1);
 703         ((char *)key)[2] = ((lmPasswd[1]&0x03)<<6) | (lmPasswd[2]>>2);
 704         ((char *)key)[3] = ((lmPasswd[2]&0x07)<<5) | (lmPasswd[3]>>3);
 705         ((char *)key)[4] = ((lmPasswd[3]&0x0F)<<4) | (lmPasswd[4]>>4);
 706         ((char *)key)[5] = ((lmPasswd[4]&0x1F)<<3) | (lmPasswd[5]>>5);
 707         ((char *)key)[6] = ((lmPasswd[5]&0x3F)<<2) | (lmPasswd[6]>>6);
 708         ((char *)key)[7] = ((lmPasswd[6]&0x7F)<<1);
 709
 710         des_set_odd_parity( key );
 711 }
 712
 713 static int chk_lanman(
 714         const struct berval *scheme,
 715         const struct berval *passwd,
 716         const struct berval *cred,
 717         const char **text )
 718 {
 719         int i;
 720         char UcasePassword[15];
 721         des_cblock key;
 722         des_key_schedule schedule;
 723         des_cblock StdText = "KGS!@#$%";
 724         des_cblock PasswordHash1, PasswordHash2;
 725         char PasswordHash[33], storedPasswordHash[33];
 726
 727         for( i=0; i<cred->bv_len; i++) {
 728                 if(cred->bv_val[i] == '\0') {
 729                         return -1;      /* NUL character in password */
 730                 }
 731         }
 732
 733         if( cred->bv_val[i] != '\0' ) {
 734                 return -1;      /* passwd must behave like a string */
 735         }
 736
 737         strncpy( UcasePassword, cred->bv_val, 14 );
 738         UcasePassword[14] = '\0';
 739         ldap_pvt_str2upper( UcasePassword );
 740
 741         lmPasswd_to_key( UcasePassword, &key );
 742         des_set_key_unchecked( &key, schedule );
 743         des_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT );
 744
 745         lmPasswd_to_key( &UcasePassword[7], &key );
 746         des_set_key_unchecked( &key, schedule );
 747         des_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT );
 748
 749         sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 750                 PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3],
 751                 PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7],
 752                 PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3],
 753                 PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] );
 754
 755         /* as a precaution convert stored password hash to lower case */
 756         strncpy( storedPasswordHash, passwd->bv_val, 32 );
 757         storedPasswordHash[32] = '\0';
 758         ldap_pvt_str2lower( storedPasswordHash );
 759
 760         return memcmp( PasswordHash, storedPasswordHash, 32) ? 1 : 0;
 761 }
 762 #endif /* SLAPD_LMHASH */
 763
 764 #ifdef SLAPD_NS_MTA_MD5
 765 static int chk_ns_mta_md5(
 766         const struct berval *scheme,
 767         const struct berval *passwd,
 768         const struct berval *cred,
 769         const char **text )
 770 {
 771         lutil_MD5_CTX MD5context;
 772         unsigned char MD5digest[LUTIL_MD5_BYTES], c;
 773         char buffer[LUTIL_MD5_BYTES*2];
 774         int i;
 775
 776         if( passwd->bv_len != LUTIL_MD5_BYTES*2 ) {
 777                 return 1;
 778         }
 779
 780         /* hash credentials with salt */
 781         lutil_MD5Init(&MD5context);
 782         lutil_MD5Update(&MD5context,
 783                 (const unsigned char *) &passwd->bv_val[32],
 784                 32 );
 785
 786         c = 0x59;
 787         lutil_MD5Update(&MD5context,
 788                 (const unsigned char *) &c,
 789                 1 );
 790
 791         lutil_MD5Update(&MD5context,
 792                 (const unsigned char *) cred->bv_val,
 793                 cred->bv_len );
 794
 795         c = 0xF7;
 796         lutil_MD5Update(&MD5context,
 797                 (const unsigned char *) &c,
 798                 1 );
 799
 800         lutil_MD5Update(&MD5context,
 801                 (const unsigned char *) &passwd->bv_val[32],
 802                 32 );
 803
 804         lutil_MD5Final(MD5digest, &MD5context);
 805
 806         for( i=0; i < sizeof( MD5digest ); i++ ) {
 807                 buffer[i+i]   = "0123456789abcdef"[(MD5digest[i]>>4) & 0x0F];
 808                 buffer[i+i+1] = "0123456789abcdef"[ MD5digest[i] & 0x0F];
 809         }
 810
 811         /* compare */
 812         return memcmp((char *)passwd->bv_val,
 813                 (char *)buffer, sizeof(buffer)) ? 1 : 0;
 814 }
 815 #endif
 816
 817 #ifdef SLAPD_SPASSWD
 818 #ifdef HAVE_CYRUS_SASL
 819 sasl_conn_t *lutil_passwd_sasl_conn = NULL;
 820 #endif
 821
 822 static int chk_sasl(
 823         const struct berval *sc,
 824         const struct berval * passwd,
 825         const struct berval * cred,
 826         const char **text )
 827 {
 828         unsigned int i;
 829         int rtn;
 830
 831         for( i=0; i<cred->bv_len; i++) {
 832                 if(cred->bv_val[i] == '\0') {
 833                         return 1;       /* NUL character in password */
 834                 }
 835         }
 836
 837         if( cred->bv_val[i] != '\0' ) {
 838                 return 1;       /* cred must behave like a string */
 839         }
 840
 841         for( i=0; i<passwd->bv_len; i++) {
 842                 if(passwd->bv_val[i] == '\0') {
 843                         return 1;       /* NUL character in password */
 844                 }
 845         }
 846
 847         if( passwd->bv_val[i] != '\0' ) {
 848                 return 1;       /* passwd must behave like a string */
 849         }
 850
 851         rtn = 1;
 852
 853 #ifdef HAVE_CYRUS_SASL
 854         if( lutil_passwd_sasl_conn != NULL ) {
 855                 int sc;
 856 # if SASL_VERSION_MAJOR < 2
 857                 sc = sasl_checkpass( lutil_passwd_sasl_conn,
 858                         passwd->bv_val, passwd->bv_len,
 859                         cred->bv_val, cred->bv_len,
 860                         text );
 861 # else
 862                 sc = sasl_checkpass( lutil_passwd_sasl_conn,
 863                         passwd->bv_val, passwd->bv_len,
 864                         cred->bv_val, cred->bv_len );
 865 # endif
 866                 rtn = ( sc != SASL_OK );
 867         }
 868 #endif
 869
 870         return rtn;
 871 }
 872 #endif
 873
 874 #ifdef SLAPD_KPASSWD
 875 static int chk_kerberos(
 876         const struct berval *sc,
 877         const struct berval * passwd,
 878         const struct berval * cred,
 879         const char **text )
 880 {
 881         unsigned int i;
 882         int rtn;
 883
 884         for( i=0; i<cred->bv_len; i++) {
 885                 if(cred->bv_val[i] == '\0') {
 886                         return 1;       /* NUL character in password */
 887                 }
 888         }
 889
 890         if( cred->bv_val[i] != '\0' ) {
 891                 return 1;       /* cred must behave like a string */
 892         }
 893
 894         for( i=0; i<passwd->bv_len; i++) {
 895                 if(passwd->bv_val[i] == '\0') {
 896                         return 1;       /* NUL character in password */
 897                 }
 898         }
 899
 900         if( passwd->bv_val[i] != '\0' ) {
 901                 return 1;       /* passwd must behave like a string */
 902         }
 903
 904         rtn = 1;
 905
 906 #ifdef HAVE_KRB5 /* HAVE_HEIMDAL_KRB5 */
 907         {
 908 /* Portions:
 909  * Copyright (c) 1997, 1998, 1999 Kungliga Tekniska H\xf6gskolan
 910  * (Royal Institute of Technology, Stockholm, Sweden).
 911  * All rights reserved.
 912  *
 913  * Redistribution and use in source and binary forms, with or without
 914  * modification, are permitted provided that the following conditions
 915  * are met:
 916  *
 917  * 1. Redistributions of source code must retain the above copyright
 918  *    notice, this list of conditions and the following disclaimer.
 919  *
 920  * 2. Redistributions in binary form must reproduce the above copyright
 921  *    notice, this list of conditions and the following disclaimer in the
 922  *    documentation and/or other materials provided with the distribution.
 923  *
 924  * 3. Neither the name of the Institute nor the names of its contributors
 925  *    may be used to endorse or promote products derived from this software
 926  *    without specific prior written permission.
 927  *
 928  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 929  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 930  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 931  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 932  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 933  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 934  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 935  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 936  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 937  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 938  * SUCH DAMAGE.
 939  */
 940
 941                 krb5_context context;
 942                 krb5_error_code ret;
 943                 krb5_creds creds;
 944                 krb5_get_init_creds_opt get_options;
 945                 krb5_verify_init_creds_opt verify_options;
 946                 krb5_principal client, server;
 947 #ifdef notdef
 948                 krb5_preauthtype pre_auth_types[] = {KRB5_PADATA_ENC_TIMESTAMP};
 949 #endif
 950
 951                 ret = krb5_init_context( &context );
 952                 if (ret) {
 953                         return 1;
 954                 }
 955
 956 #ifdef notdef
 957                 krb5_get_init_creds_opt_set_preauth_list(&get_options,
 958                         pre_auth_types, 1);
 959 #endif
 960
 961                 krb5_get_init_creds_opt_init( &get_options );
 962
 963                 krb5_verify_init_creds_opt_init( &verify_options );
 964
 965                 ret = krb5_parse_name( context, passwd->bv_val, &client );
 966
 967                 if (ret) {
 968                         krb5_free_context( context );
 969                         return 1;
 970                 }
 971
 972                 ret = krb5_get_init_creds_password( context,
 973                         &creds, client, cred->bv_val, NULL,
 974                         NULL, 0, NULL, &get_options );
 975
 976                 if (ret) {
 977                         krb5_free_principal( context, client );
 978                         krb5_free_context( context );
 979                         return 1;
 980                 }
 981
 982                 {
 983                         char *host = ldap_pvt_get_fqdn( NULL );
 984
 985                         if( host == NULL ) {
 986                                 krb5_free_principal( context, client );
 987                                 krb5_free_context( context );
 988                                 return 1;
 989                         }
 990
 991                         ret = krb5_sname_to_principal( context,
 992                                 host, "ldap", KRB5_NT_SRV_HST, &server );
 993
 994                         ber_memfree( host );
 995                 }
 996
 997                 if (ret) {
 998                         krb5_free_principal( context, client );
 999                         krb5_free_context( context );
1000                         return 1;
1001                 }
1002
1003                 ret = krb5_verify_init_creds( context,
1004                         &creds, server, NULL, NULL, &verify_options );
1005
1006                 krb5_free_principal( context, client );
1007                 krb5_free_principal( context, server );
1008                 krb5_free_cred_contents( context, &creds );
1009                 krb5_free_context( context );
1010
1011                 rtn = !!ret;
1012         }
1013 #elif   defined(HAVE_KRB4)
1014         {
1015                 /* Borrowed from Heimdal kpopper */
1016 /* Portions:
1017  * Copyright (c) 1989 Regents of the University of California.
1018  * All rights reserved.  The Berkeley software License Agreement
1019  * specifies the terms and conditions for redistribution.
1020  */
1021
1022                 int status;
1023                 char lrealm[REALM_SZ];
1024                 char tkt[MAXHOSTNAMELEN];
1025
1026                 status = krb_get_lrealm(lrealm,1);
1027                 if (status == KFAILURE) {
1028                         return 1;
1029                 }
1030
1031                 snprintf(tkt, sizeof(tkt), "%s_slapd.%u",
1032                         TKT_ROOT, (unsigned)getpid());
1033                 krb_set_tkt_string (tkt);
1034
1035                 status = krb_verify_user( passwd->bv_val, "", lrealm,
1036                         cred->bv_val, 1, "ldap");
1037
1038                 dest_tkt(); /* no point in keeping the tickets */
1039
1040                 return status == KFAILURE;
1041         }
1042 #endif
1043
1044         return rtn;
1045 }
1046 #endif /* SLAPD_KPASSWD */
1047
1048 #ifdef SLAPD_CRYPT
1049 static int chk_crypt(
1050         const struct berval *sc,
1051         const struct berval * passwd,
1052         const struct berval * cred,
1053         const char **text )
1054 {
1055         char *cr;
1056         unsigned int i;
1057
1058         for( i=0; i<cred->bv_len; i++) {
1059                 if(cred->bv_val[i] == '\0') {
1060                         return 1;       /* NUL character in password */
1061                 }
1062         }
1063
1064         if( cred->bv_val[i] != '\0' ) {
1065                 return -1;      /* cred must behave like a string */
1066         }
1067
1068         if( passwd->bv_len < 2 ) {
1069                 return -1;      /* passwd must be at least two characters long */
1070         }
1071
1072         for( i=0; i<passwd->bv_len; i++) {
1073                 if(passwd->bv_val[i] == '\0') {
1074                         return -1;      /* NUL character in password */
1075                 }
1076         }
1077
1078         if( passwd->bv_val[i] != '\0' ) {
1079                 return -1;      /* passwd must behave like a string */
1080         }
1081
1082         cr = crypt( cred->bv_val, passwd->bv_val );
1083
1084         if( cr == NULL || cr[0] == '\0' ) {
1085                 /* salt must have been invalid */
1086                 return -1;
1087         }
1088
1089         return strcmp( passwd->bv_val, cr ) ? 1 : 0;
1090 }
1091
1092 # if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
1093 static int chk_unix(
1094         const struct berval *sc,
1095         const struct berval * passwd,
1096         const struct berval * cred,
1097         const char **text )
1098 {
1099         unsigned int i;
1100         char *pw,*cr;
1101
1102         for( i=0; i<cred->bv_len; i++) {
1103                 if(cred->bv_val[i] == '\0') {
1104                         return -1;      /* NUL character in password */
1105                 }
1106         }
1107         if( cred->bv_val[i] != '\0' ) {
1108                 return -1;      /* cred must behave like a string */
1109         }
1110
1111         for( i=0; i<passwd->bv_len; i++) {
1112                 if(passwd->bv_val[i] == '\0') {
1113                         return -1;      /* NUL character in password */
1114                 }
1115         }
1116
1117         if( passwd->bv_val[i] != '\0' ) {
1118                 return -1;      /* passwd must behave like a string */
1119         }
1120
1121         {
1122                 struct passwd *pwd = getpwnam(passwd->bv_val);
1123
1124                 if(pwd == NULL) {
1125                         return -1;      /* not found */
1126                 }
1127
1128                 pw = pwd->pw_passwd;
1129         }
1130 #  ifdef HAVE_GETSPNAM
1131         {
1132                 struct spwd *spwd = getspnam(passwd->bv_val);
1133
1134                 if(spwd != NULL) {
1135                         pw = spwd->sp_pwdp;
1136                 }
1137         }
1138 #  endif
1139 #  ifdef HAVE_AIX_SECURITY
1140         {
1141                 struct userpw *upw = getuserpw(passwd->bv_val);
1142
1143                 if (upw != NULL) {
1144                         pw = upw->upw_passwd;
1145                 }
1146         }
1147 #  endif
1148
1149         if( pw == NULL || pw[0] == '\0' || pw[1] == '\0' ) {
1150                 /* password must must be at least two characters long */
1151                 return -1;
1152         }
1153
1154         cr = crypt(cred->bv_val, pw);
1155
1156         if( cr == NULL || cr[0] == '\0' ) {
1157                 /* salt must have been invalid */
1158                 return -1;
1159         }
1160
1161         return strcmp(pw, cr) ? 1 : 0;
1162
1163 }
1164 # endif
1165 #endif
1166
1167 /* PASSWORD GENERATION ROUTINES */
1168
1169 #ifdef LUTIL_SHA1_BYTES
1170 static struct berval *hash_ssha1(
1171         const struct berval *scheme,
1172         const struct berval  *passwd,
1173         const char **text )
1174 {
1175         lutil_SHA1_CTX  SHA1context;
1176         unsigned char   SHA1digest[LUTIL_SHA1_BYTES];
1177         char            saltdata[4];
1178         struct berval digest;
1179         struct berval salt;
1180
1181         digest.bv_val = (char *) SHA1digest;
1182         digest.bv_len = sizeof(SHA1digest);
1183         salt.bv_val = saltdata;
1184         salt.bv_len = sizeof(saltdata);
1185
1186         if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) {
1187                 return NULL;
1188         }
1189
1190         lutil_SHA1Init( &SHA1context );
1191         lutil_SHA1Update( &SHA1context,
1192                 (const unsigned char *)passwd->bv_val, passwd->bv_len );
1193         lutil_SHA1Update( &SHA1context,
1194                 (const unsigned char *)salt.bv_val, salt.bv_len );
1195         lutil_SHA1Final( SHA1digest, &SHA1context );
1196
1197         return pw_string64( scheme, &digest, &salt);
1198 }
1199
1200 static struct berval *hash_sha1(
1201         const struct berval *scheme,
1202         const struct berval  *passwd,
1203         const char **text )
1204 {
1205         lutil_SHA1_CTX  SHA1context;
1206         unsigned char   SHA1digest[LUTIL_SHA1_BYTES];
1207         struct berval digest;
1208         digest.bv_val = (char *) SHA1digest;
1209         digest.bv_len = sizeof(SHA1digest);
1210
1211         lutil_SHA1Init( &SHA1context );
1212         lutil_SHA1Update( &SHA1context,
1213                 (const unsigned char *)passwd->bv_val, passwd->bv_len );
1214         lutil_SHA1Final( SHA1digest, &SHA1context );
1215
1216         return pw_string64( scheme, &digest, NULL);
1217 }
1218 #endif
1219
1220 static struct berval *hash_smd5(
1221         const struct berval *scheme,
1222         const struct berval  *passwd,
1223         const char **text )
1224 {
1225         lutil_MD5_CTX   MD5context;
1226         unsigned char   MD5digest[LUTIL_MD5_BYTES];
1227         char            saltdata[4];
1228         struct berval digest;
1229         struct berval salt;
1230
1231         digest.bv_val = (char *) MD5digest;
1232         digest.bv_len = sizeof(MD5digest);
1233         salt.bv_val = saltdata;
1234         salt.bv_len = sizeof(saltdata);
1235
1236         if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) {
1237                 return NULL;
1238         }
1239
1240         lutil_MD5Init( &MD5context );
1241         lutil_MD5Update( &MD5context,
1242                 (const unsigned char *) passwd->bv_val, passwd->bv_len );
1243         lutil_MD5Update( &MD5context,
1244                 (const unsigned char *) salt.bv_val, salt.bv_len );
1245         lutil_MD5Final( MD5digest, &MD5context );
1246
1247         return pw_string64( scheme, &digest, &salt );
1248 }
1249
1250 static struct berval *hash_md5(
1251         const struct berval *scheme,
1252         const struct berval  *passwd,
1253         const char **text )
1254 {
1255         lutil_MD5_CTX   MD5context;
1256         unsigned char   MD5digest[LUTIL_MD5_BYTES];
1257
1258         struct berval digest;
1259
1260         digest.bv_val = (char *) MD5digest;
1261         digest.bv_len = sizeof(MD5digest);
1262
1263         lutil_MD5Init( &MD5context );
1264         lutil_MD5Update( &MD5context,
1265                 (const unsigned char *) passwd->bv_val, passwd->bv_len );
1266         lutil_MD5Final( MD5digest, &MD5context );
1267
1268         return pw_string64( scheme, &digest, NULL );
1269 ;
1270 }
1271
1272 #ifdef SLAPD_LMHASH
1273 static struct berval *hash_lanman(
1274         const struct berval *scheme,
1275         const struct berval *passwd,
1276         const char **text )
1277 {
1278
1279         int i;
1280         char UcasePassword[15];
1281         des_cblock key;
1282         des_key_schedule schedule;
1283         des_cblock StdText = "KGS!@#$%";
1284         des_cblock PasswordHash1, PasswordHash2;
1285         char PasswordHash[33];
1286         struct berval hash;
1287
1288         for( i=0; i<passwd->bv_len; i++) {
1289                 if(passwd->bv_val[i] == '\0') {
1290                         return NULL;    /* NUL character in password */
1291                 }
1292         }
1293
1294         if( passwd->bv_val[i] != '\0' ) {
1295                 return NULL;    /* passwd must behave like a string */
1296         }
1297
1298         strncpy( UcasePassword, passwd->bv_val, 14 );
1299         UcasePassword[14] = '\0';
1300         ldap_pvt_str2upper( UcasePassword );
1301
1302         lmPasswd_to_key( UcasePassword, &key );
1303         des_set_key_unchecked( &key, schedule );
1304         des_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT );
1305
1306         lmPasswd_to_key( &UcasePassword[7], &key );
1307         des_set_key_unchecked( &key, schedule );
1308         des_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT );
1309
1310         sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
1311                 PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3],
1312                 PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7],
1313                 PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3],
1314                 PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] );
1315
1316         hash.bv_val = PasswordHash;
1317         hash.bv_len = 32;
1318
1319         return pw_string( scheme, &hash );
1320 }
1321 #endif /* SLAPD_LMHASH */
1322
1323 #ifdef SLAPD_CRYPT
1324 static struct berval *hash_crypt(
1325         const struct berval *scheme,
1326         const struct berval *passwd,
1327         const char **text )
1328 {
1329         struct berval hash;
1330         unsigned char salt[32]; /* salt suitable for most anything */
1331         unsigned int i;
1332
1333         for( i=0; i<passwd->bv_len; i++) {
1334                 if(passwd->bv_val[i] == '\0') {
1335                         return NULL;    /* NUL character in password */
1336                 }
1337         }
1338
1339         if( passwd->bv_val[i] != '\0' ) {
1340                 return NULL;    /* passwd must behave like a string */
1341         }
1342
1343         if( lutil_entropy( salt, sizeof( salt ) ) < 0 ) {
1344                 return NULL;
1345         }
1346
1347         for( i=0; i< ( sizeof(salt) - 1 ); i++ ) {
1348                 salt[i] = crypt64[ salt[i] % (sizeof(crypt64)-1) ];
1349         }
1350         salt[sizeof( salt ) - 1 ] = '\0';
1351
1352         if( salt_format != NULL ) {
1353                 /* copy the salt we made into entropy before snprintfing
1354                    it back into the salt */
1355                 char entropy[sizeof(salt)];
1356                 strcpy( entropy, (char *) salt );
1357                 snprintf( (char *) salt, sizeof(entropy), salt_format, entropy );
1358         }
1359
1360         hash.bv_val = crypt( passwd->bv_val, (char *) salt );
1361
1362         if( hash.bv_val == NULL ) return NULL;
1363
1364         hash.bv_len = strlen( hash.bv_val );
1365
1366         if( hash.bv_len == 0 ) {
1367                 return NULL;
1368         }
1369
1370         return pw_string( scheme, &hash );
1371 }
1372 #endif
1373
1374 int lutil_salt_format(const char *format)
1375 {
1376 #ifdef SLAPD_CRYPT
1377         free( salt_format );
1378
1379         salt_format = format != NULL ? strdup( format ) : NULL;
1380 #endif
1381
1382         return 0;
1383 }
1384
1385 #ifdef SLAPD_CLEARTEXT
1386 static struct berval *hash_clear(
1387         const struct berval *scheme,
1388         const struct berval  *passwd,
1389         const char **text )
1390 {
1391         return ber_bvdup( (struct berval *) passwd );
1392 }
1393 #endif
1394