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

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