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

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