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 1998-2004 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 #define SALT_SIZE       4
 105
 106 static LUTIL_PASSWD_CHK_FUNC chk_md5;
 107 static LUTIL_PASSWD_CHK_FUNC chk_smd5;
 108 static LUTIL_PASSWD_HASH_FUNC hash_smd5;
 109 static LUTIL_PASSWD_HASH_FUNC hash_md5;
 110
 111
 112 #ifdef LUTIL_SHA1_BYTES
 113 static LUTIL_PASSWD_CHK_FUNC chk_ssha1;
 114 static LUTIL_PASSWD_CHK_FUNC chk_sha1;
 115 static LUTIL_PASSWD_HASH_FUNC hash_sha1;
 116 static LUTIL_PASSWD_HASH_FUNC hash_ssha1;
 117 #endif
 118
 119 #ifdef SLAPD_LMHASH
 120 static LUTIL_PASSWD_CHK_FUNC chk_lanman;
 121 static LUTIL_PASSWD_HASH_FUNC hash_lanman;
 122 #endif
 123
 124 #ifdef SLAPD_NS_MTA_MD5
 125 static LUTIL_PASSWD_CHK_FUNC chk_ns_mta_md5;
 126 #endif
 127
 128 #ifdef SLAPD_SPASSWD
 129 static LUTIL_PASSWD_CHK_FUNC chk_sasl;
 130 #endif
 131
 132 #ifdef SLAPD_KPASSWD
 133 static LUTIL_PASSWD_CHK_FUNC chk_kerberos;
 134 #endif
 135
 136 #ifdef SLAPD_CRYPT
 137 static LUTIL_PASSWD_CHK_FUNC chk_crypt;
 138 static LUTIL_PASSWD_HASH_FUNC hash_crypt;
 139
 140 #if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
 141 static LUTIL_PASSWD_CHK_FUNC chk_unix;
 142 #endif
 143 #endif
 144
 145 /* password hash routines */
 146
 147 #ifdef SLAPD_CLEARTEXT
 148 static LUTIL_PASSWD_HASH_FUNC hash_clear;
 149 #endif
 150
 151 static struct pw_slist *pw_schemes;
 152
 153 static const struct pw_scheme pw_schemes_default[] =
 154 {
 155 #ifdef LUTIL_SHA1_BYTES
 156         { BER_BVC("{SSHA}"),            chk_ssha1, hash_ssha1 },
 157         { BER_BVC("{SHA}"),                     chk_sha1, hash_sha1 },
 158 #endif
 159
 160         { BER_BVC("{SMD5}"),            chk_smd5, hash_smd5 },
 161         { BER_BVC("{MD5}"),                     chk_md5, hash_md5 },
 162
 163 #ifdef SLAPD_LMHASH
 164         { BER_BVC("{LANMAN}"),          chk_lanman, hash_lanman },
 165 #endif /* SLAPD_LMHASH */
 166
 167 #ifdef SLAPD_NS_MTA_MD5
 168         { BER_BVC("{NS-MTA-MD5}"),      chk_ns_mta_md5, NULL },
 169 #endif /* SLAPD_NS_MTA_MD5 */
 170
 171 #ifdef SLAPD_SPASSWD
 172         { BER_BVC("{SASL}"),            chk_sasl, NULL },
 173 #endif
 174
 175 #ifdef SLAPD_KPASSWD
 176         { BER_BVC("{KERBEROS}"),        chk_kerberos, NULL },
 177 #endif
 178
 179 #ifdef SLAPD_CRYPT
 180         { BER_BVC("{CRYPT}"),           chk_crypt, hash_crypt },
 181 # if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
 182         { BER_BVC("{UNIX}"),            chk_unix, NULL },
 183 # endif
 184 #endif
 185
 186 #ifdef SLAPD_CLEARTEXT
 187         /* pseudo scheme */
 188         { {0, "{CLEARTEXT}"},           NULL, hash_clear },
 189 #endif
 190
 191         { BER_BVNULL, NULL, NULL }
 192 };
 193
 194 int lutil_passwd_add(
 195         struct berval *scheme,
 196         LUTIL_PASSWD_CHK_FUNC *chk,
 197         LUTIL_PASSWD_HASH_FUNC *hash )
 198 {
 199         struct pw_slist *ptr;
 200
 201         ptr = ber_memalloc( sizeof( struct pw_slist ));
 202         if (!ptr) return -1;
 203         ptr->next = pw_schemes;
 204         ptr->s.name = *scheme;
 205         ptr->s.chk_fn = chk;
 206         ptr->s.hash_fn = hash;
 207         pw_schemes = ptr;
 208         return 0;
 209 }
 210
 211 void lutil_passwd_init()
 212 {
 213         struct pw_slist *ptr;
 214         struct pw_scheme *s;
 215
 216         for( s=(struct pw_scheme *)pw_schemes_default; s->name.bv_val; s++) {
 217                 if ( lutil_passwd_add( &s->name, s->chk_fn, s->hash_fn )) break;
 218         }
 219 }
 220
 221 void lutil_passwd_destroy()
 222 {
 223         struct pw_slist *ptr, *next;
 224
 225         for( ptr=pw_schemes; ptr; ptr=next ) {
 226                 next = ptr->next;
 227                 ber_memfree( ptr );
 228         }
 229 }
 230
 231 static const struct pw_scheme *get_scheme(
 232         const char* scheme )
 233 {
 234         struct pw_slist *pws;
 235
 236         if (!pw_schemes) lutil_passwd_init();
 237
 238         for( pws=pw_schemes; pws; pws=pws->next ) {
 239                 if( strcasecmp(scheme, pws->s.name.bv_val ) == 0 ) {
 240                         return &(pws->s);
 241                 }
 242         }
 243
 244         return NULL;
 245 }
 246
 247 int lutil_passwd_scheme(
 248         const char* scheme )
 249 {
 250         if( scheme == NULL ) {
 251                 return 0;
 252         }
 253
 254         return get_scheme(scheme) != NULL;
 255 }
 256
 257
 258 static int is_allowed_scheme(
 259         const char* scheme,
 260         const char** schemes )
 261 {
 262         int i;
 263
 264         if( schemes == NULL ) return 1;
 265
 266         for( i=0; schemes[i] != NULL; i++ ) {
 267                 if( strcasecmp( scheme, schemes[i] ) == 0 ) {
 268                         return 1;
 269                 }
 270         }
 271         return 0;
 272 }
 273
 274 static struct berval *passwd_scheme(
 275         const struct pw_scheme *scheme,
 276         const struct berval * passwd,
 277         struct berval *bv,
 278         const char** allowed )
 279 {
 280         if( !is_allowed_scheme( scheme->name.bv_val, allowed ) ) {
 281                 return NULL;
 282         }
 283
 284         if( passwd->bv_len >= scheme->name.bv_len ) {
 285                 if( strncasecmp( passwd->bv_val, scheme->name.bv_val, scheme->name.bv_len ) == 0 ) {
 286                         bv->bv_val = &passwd->bv_val[scheme->name.bv_len];
 287                         bv->bv_len = passwd->bv_len - scheme->name.bv_len;
 288
 289                         return bv;
 290                 }
 291         }
 292
 293         return NULL;
 294 }
 295
 296 /*
 297  * Return 0 if creds are good.
 298  */
 299 int
 300 lutil_passwd(
 301         const struct berval *passwd,    /* stored passwd */
 302         const struct berval *cred,              /* user cred */
 303         const char **schemes,
 304         const char **text )
 305 {
 306         struct pw_slist *pws;
 307
 308         if ( text ) *text = NULL;
 309
 310         if (cred == NULL || cred->bv_len == 0 ||
 311                 passwd == NULL || passwd->bv_len == 0 )
 312         {
 313                 return -1;
 314         }
 315
 316         if (!pw_schemes) lutil_passwd_init();
 317
 318         for( pws=pw_schemes; pws; pws=pws->next ) {
 319                 if( pws->s.chk_fn ) {
 320                         struct berval x;
 321                         struct berval *p = passwd_scheme( &(pws->s),
 322                                 passwd, &x, schemes );
 323
 324                         if( p != NULL ) {
 325                                 return (pws->s.chk_fn)( &(pws->s.name), p, cred, text );
 326                         }
 327                 }
 328         }
 329
 330 #ifdef SLAPD_CLEARTEXT
 331         if( is_allowed_scheme("{CLEARTEXT}", schemes ) ) {
 332                 return (( passwd->bv_len == cred->bv_len ) &&
 333                                 ( passwd->bv_val[0] != '{' /*'}'*/ ))
 334                         ? memcmp( passwd->bv_val, cred->bv_val, passwd->bv_len )
 335                         : 1;
 336         }
 337 #endif
 338         return 1;
 339 }
 340
 341 struct berval * lutil_passwd_generate( ber_len_t len )
 342 {
 343         struct berval *pw;
 344
 345         if( len < 1 ) return NULL;
 346
 347         pw = ber_memalloc( sizeof( struct berval ) );
 348         if( pw == NULL ) return NULL;
 349
 350         pw->bv_len = len;
 351         pw->bv_val = ber_memalloc( len + 1 );
 352
 353         if( pw->bv_val == NULL ) {
 354                 ber_memfree( pw );
 355                 return NULL;
 356         }
 357
 358         if( lutil_entropy( (unsigned char *) pw->bv_val, pw->bv_len) < 0 ) {
 359                 ber_bvfree( pw );
 360                 return NULL;
 361         }
 362
 363         for( len = 0; len < pw->bv_len; len++ ) {
 364                 pw->bv_val[len] = crypt64[
 365                         pw->bv_val[len] % (sizeof(crypt64)-1) ];
 366         }
 367
 368         pw->bv_val[len] = '\0';
 369
 370         return pw;
 371 }
 372
 373 struct berval * lutil_passwd_hash(
 374         const struct berval * passwd,
 375         const char * method,
 376         const char **text )
 377 {
 378         const struct pw_scheme *sc = get_scheme( method );
 379
 380         if( sc == NULL ) {
 381                 if( text ) *text = "scheme not recognized";
 382                 return NULL;
 383         }
 384
 385         if( ! sc->hash_fn ) {
 386                 if( text ) *text = "scheme provided no hash function";
 387                 return NULL;
 388         }
 389
 390         if( text ) *text = NULL;
 391
 392         return (sc->hash_fn)( &sc->name, passwd, text );
 393 }
 394
 395 /* pw_string is only called when SLAPD_LMHASH or SLAPD_CRYPT is defined */
 396 #if defined(SLAPD_LMHASH) || defined(SLAPD_CRYPT)
 397 static struct berval * pw_string(
 398         const struct berval *sc,
 399         const struct berval *passwd )
 400 {
 401         struct berval *pw = ber_memalloc( sizeof( struct berval ) );
 402         if( pw == NULL ) return NULL;
 403
 404         pw->bv_len = sc->bv_len + passwd->bv_len;
 405         pw->bv_val = ber_memalloc( pw->bv_len + 1 );
 406
 407         if( pw->bv_val == NULL ) {
 408                 ber_memfree( pw );
 409                 return NULL;
 410         }
 411
 412         AC_MEMCPY( pw->bv_val, sc->bv_val, sc->bv_len );
 413         AC_MEMCPY( &pw->bv_val[sc->bv_len], passwd->bv_val, passwd->bv_len );
 414
 415         pw->bv_val[pw->bv_len] = '\0';
 416         return pw;
 417 }
 418 #endif /* SLAPD_LMHASH || SLAPD_CRYPT */
 419
 420 static struct berval * pw_string64(
 421         const struct berval *sc,
 422         const struct berval *hash,
 423         const struct berval *salt )
 424 {
 425         int rc;
 426         struct berval string;
 427         struct berval *b64 = ber_memalloc( sizeof(struct berval) );
 428         size_t b64len;
 429
 430         if( b64 == NULL ) return NULL;
 431
 432         if( salt ) {
 433                 /* need to base64 combined string */
 434                 string.bv_len = hash->bv_len + salt->bv_len;
 435                 string.bv_val = ber_memalloc( string.bv_len + 1 );
 436
 437                 if( string.bv_val == NULL ) {
 438                         ber_memfree( b64 );
 439                         return NULL;
 440                 }
 441
 442                 AC_MEMCPY( string.bv_val, hash->bv_val,
 443                         hash->bv_len );
 444                 AC_MEMCPY( &string.bv_val[hash->bv_len], salt->bv_val,
 445                         salt->bv_len );
 446                 string.bv_val[string.bv_len] = '\0';
 447
 448         } else {
 449                 string = *hash;
 450         }
 451
 452         b64len = LUTIL_BASE64_ENCODE_LEN( string.bv_len ) + 1;
 453         b64->bv_len = b64len + sc->bv_len;
 454         b64->bv_val = ber_memalloc( b64->bv_len + 1 );
 455
 456         if( b64->bv_val == NULL ) {
 457                 if( salt ) ber_memfree( string.bv_val );
 458                 ber_memfree( b64 );
 459                 return NULL;
 460         }
 461
 462         AC_MEMCPY(b64->bv_val, sc->bv_val, sc->bv_len);
 463
 464         rc = lutil_b64_ntop(
 465                 (unsigned char *) string.bv_val, string.bv_len,
 466                 &b64->bv_val[sc->bv_len], b64len );
 467
 468         if( salt ) ber_memfree( string.bv_val );
 469
 470         if( rc < 0 ) {
 471                 ber_bvfree( b64 );
 472                 return NULL;
 473         }
 474
 475         /* recompute length */
 476         b64->bv_len = sc->bv_len + rc;
 477         assert( strlen(b64->bv_val) == b64->bv_len );
 478         return b64;
 479 }
 480
 481 /* PASSWORD CHECK ROUTINES */
 482
 483 #ifdef LUTIL_SHA1_BYTES
 484 static int chk_ssha1(
 485         const struct berval *sc,
 486         const struct berval * passwd,
 487         const struct berval * cred,
 488         const char **text )
 489 {
 490         lutil_SHA1_CTX SHA1context;
 491         unsigned char SHA1digest[LUTIL_SHA1_BYTES];
 492         int rc;
 493         unsigned char *orig_pass = NULL;
 494
 495         /* safety check */
 496         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <
 497                 sizeof(SHA1digest)+SALT_SIZE) {
 498                 return -1;
 499         }
 500
 501         /* decode base64 password */
 502         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 503                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 504
 505         if( orig_pass == NULL ) return -1;
 506
 507         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 508
 509         if (rc < (int)(sizeof(SHA1digest)+SALT_SIZE)) {
 510                 ber_memfree(orig_pass);
 511                 return -1;
 512         }
 513
 514         /* hash credentials with salt */
 515         lutil_SHA1Init(&SHA1context);
 516         lutil_SHA1Update(&SHA1context,
 517                 (const unsigned char *) cred->bv_val, cred->bv_len);
 518         lutil_SHA1Update(&SHA1context,
 519                 (const unsigned char *) &orig_pass[sizeof(SHA1digest)],
 520                 rc - sizeof(SHA1digest));
 521         lutil_SHA1Final(SHA1digest, &SHA1context);
 522
 523         /* compare */
 524         rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
 525         ber_memfree(orig_pass);
 526         return rc ? 1 : 0;
 527 }
 528
 529 static int chk_sha1(
 530         const struct berval *sc,
 531         const struct berval * passwd,
 532         const struct berval * cred,
 533         const char **text )
 534 {
 535         lutil_SHA1_CTX SHA1context;
 536         unsigned char SHA1digest[LUTIL_SHA1_BYTES];
 537         int rc;
 538         unsigned char *orig_pass = NULL;
 539
 540         /* safety check */
 541         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) < sizeof(SHA1digest)) {
 542                 return -1;
 543         }
 544
 545         /* base64 un-encode password */
 546         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 547                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 548
 549         if( orig_pass == NULL ) return -1;
 550
 551         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 552
 553         if( rc != sizeof(SHA1digest) ) {
 554                 ber_memfree(orig_pass);
 555                 return -1;
 556         }
 557
 558         /* hash credentials with salt */
 559         lutil_SHA1Init(&SHA1context);
 560         lutil_SHA1Update(&SHA1context,
 561                 (const unsigned char *) cred->bv_val, cred->bv_len);
 562         lutil_SHA1Final(SHA1digest, &SHA1context);
 563
 564         /* compare */
 565         rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
 566         ber_memfree(orig_pass);
 567         return rc ? 1 : 0;
 568 }
 569 #endif
 570
 571 static int chk_smd5(
 572         const struct berval *sc,
 573         const struct berval * passwd,
 574         const struct berval * cred,
 575         const char **text )
 576 {
 577         lutil_MD5_CTX MD5context;
 578         unsigned char MD5digest[LUTIL_MD5_BYTES];
 579         int rc;
 580         unsigned char *orig_pass = NULL;
 581
 582         /* safety check */
 583         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <
 584                 sizeof(MD5digest)+SALT_SIZE) {
 585                 return -1;
 586         }
 587
 588         /* base64 un-encode password */
 589         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 590                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 591
 592         if( orig_pass == NULL ) return -1;
 593
 594         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 595
 596         if (rc < (int)(sizeof(MD5digest)+SALT_SIZE)) {
 597                 ber_memfree(orig_pass);
 598                 return -1;
 599         }
 600
 601         /* hash credentials with salt */
 602         lutil_MD5Init(&MD5context);
 603         lutil_MD5Update(&MD5context,
 604                 (const unsigned char *) cred->bv_val,
 605                 cred->bv_len );
 606         lutil_MD5Update(&MD5context,
 607                 &orig_pass[sizeof(MD5digest)],
 608                 rc - sizeof(MD5digest));
 609         lutil_MD5Final(MD5digest, &MD5context);
 610
 611         /* compare */
 612         rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
 613         ber_memfree(orig_pass);
 614         return rc ? 1 : 0;
 615 }
 616
 617 static int chk_md5(
 618         const struct berval *sc,
 619         const struct berval * passwd,
 620         const struct berval * cred,
 621         const char **text )
 622 {
 623         lutil_MD5_CTX MD5context;
 624         unsigned char MD5digest[LUTIL_MD5_BYTES];
 625         int rc;
 626         unsigned char *orig_pass = NULL;
 627
 628         /* safety check */
 629         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) < sizeof(MD5digest)) {
 630                 return -1;
 631         }
 632
 633         /* base64 un-encode password */
 634         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 635                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 636
 637         if( orig_pass == NULL ) return -1;
 638
 639         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 640         if ( rc != sizeof(MD5digest) ) {
 641                 ber_memfree(orig_pass);
 642                 return -1;
 643         }
 644
 645         /* hash credentials with salt */
 646         lutil_MD5Init(&MD5context);
 647         lutil_MD5Update(&MD5context,
 648                 (const unsigned char *) cred->bv_val,
 649                 cred->bv_len );
 650         lutil_MD5Final(MD5digest, &MD5context);
 651
 652         /* compare */
 653         rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
 654         ber_memfree(orig_pass);
 655         return rc ? 1 : 0;
 656 }
 657
 658 #ifdef SLAPD_LMHASH
 659 /* pseudocode from RFC2433
 660  * A.2 LmPasswordHash()
 661  *
 662  *    LmPasswordHash(
 663  *    IN  0-to-14-oem-char Password,
 664  *    OUT 16-octet         PasswordHash )
 665  *    {
 666  *       Set UcasePassword to the uppercased Password
 667  *       Zero pad UcasePassword to 14 characters
 668  *
 669  *       DesHash( 1st 7-octets of UcasePassword,
 670  *                giving 1st 8-octets of PasswordHash )
 671  *
 672  *       DesHash( 2nd 7-octets of UcasePassword,
 673  *                giving 2nd 8-octets of PasswordHash )
 674  *    }
 675  *
 676  *
 677  * A.3 DesHash()
 678  *
 679  *    DesHash(
 680  *    IN  7-octet Clear,
 681  *    OUT 8-octet Cypher )
 682  *    {
 683  *        *
 684  *        * Make Cypher an irreversibly encrypted form of Clear by
 685  *        * encrypting known text using Clear as the secret key.
 686  *        * The known text consists of the string
 687  *        *
 688  *        *              KGS!@#$%
 689  *        *
 690  *
 691  *       Set StdText to "KGS!@#$%"
 692  *       DesEncrypt( StdText, Clear, giving Cypher )
 693  *    }
 694  *
 695  *
 696  * A.4 DesEncrypt()
 697  *
 698  *    DesEncrypt(
 699  *    IN  8-octet Clear,
 700  *    IN  7-octet Key,
 701  *    OUT 8-octet Cypher )
 702  *    {
 703  *        *
 704  *        * Use the DES encryption algorithm [4] in ECB mode [9]
 705  *        * to encrypt Clear into Cypher such that Cypher can
 706  *        * only be decrypted back to Clear by providing Key.
 707  *        * Note that the DES algorithm takes as input a 64-bit
 708  *        * stream where the 8th, 16th, 24th, etc.  bits are
 709  *        * parity bits ignored by the encrypting algorithm.
 710  *        * Unless you write your own DES to accept 56-bit input
 711  *        * without parity, you will need to insert the parity bits
 712  *        * yourself.
 713  *        *
 714  *    }
 715  */
 716
 717 static void lmPasswd_to_key(
 718         const unsigned char *lmPasswd,
 719         des_cblock *key)
 720 {
 721         /* make room for parity bits */
 722         ((char *)key)[0] = lmPasswd[0];
 723         ((char *)key)[1] = ((lmPasswd[0]&0x01)<<7) | (lmPasswd[1]>>1);
 724         ((char *)key)[2] = ((lmPasswd[1]&0x03)<<6) | (lmPasswd[2]>>2);
 725         ((char *)key)[3] = ((lmPasswd[2]&0x07)<<5) | (lmPasswd[3]>>3);
 726         ((char *)key)[4] = ((lmPasswd[3]&0x0F)<<4) | (lmPasswd[4]>>4);
 727         ((char *)key)[5] = ((lmPasswd[4]&0x1F)<<3) | (lmPasswd[5]>>5);
 728         ((char *)key)[6] = ((lmPasswd[5]&0x3F)<<2) | (lmPasswd[6]>>6);
 729         ((char *)key)[7] = ((lmPasswd[6]&0x7F)<<1);
 730
 731         des_set_odd_parity( key );
 732 }
 733
 734 static int chk_lanman(
 735         const struct berval *scheme,
 736         const struct berval *passwd,
 737         const struct berval *cred,
 738         const char **text )
 739 {
 740         int i;
 741         char UcasePassword[15];
 742         des_cblock key;
 743         des_key_schedule schedule;
 744         des_cblock StdText = "KGS!@#$%";
 745         des_cblock PasswordHash1, PasswordHash2;
 746         char PasswordHash[33], storedPasswordHash[33];
 747
 748         for( i=0; i<cred->bv_len; i++) {
 749                 if(cred->bv_val[i] == '\0') {
 750                         return -1;      /* NUL character in password */
 751                 }
 752         }
 753
 754         if( cred->bv_val[i] != '\0' ) {
 755                 return -1;      /* passwd must behave like a string */
 756         }
 757
 758         strncpy( UcasePassword, cred->bv_val, 14 );
 759         UcasePassword[14] = '\0';
 760         ldap_pvt_str2upper( UcasePassword );
 761
 762         lmPasswd_to_key( UcasePassword, &key );
 763         des_set_key_unchecked( &key, schedule );
 764         des_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT );
 765
 766         lmPasswd_to_key( &UcasePassword[7], &key );
 767         des_set_key_unchecked( &key, schedule );
 768         des_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT );
 769
 770         sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 771                 PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3],
 772                 PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7],
 773                 PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3],
 774                 PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] );
 775
 776         /* as a precaution convert stored password hash to lower case */
 777         strncpy( storedPasswordHash, passwd->bv_val, 32 );
 778         storedPasswordHash[32] = '\0';
 779         ldap_pvt_str2lower( storedPasswordHash );
 780
 781         return memcmp( PasswordHash, storedPasswordHash, 32) ? 1 : 0;
 782 }
 783 #endif /* SLAPD_LMHASH */
 784
 785 #ifdef SLAPD_NS_MTA_MD5
 786 static int chk_ns_mta_md5(
 787         const struct berval *scheme,
 788         const struct berval *passwd,
 789         const struct berval *cred,
 790         const char **text )
 791 {
 792         lutil_MD5_CTX MD5context;
 793         unsigned char MD5digest[LUTIL_MD5_BYTES], c;
 794         char buffer[LUTIL_MD5_BYTES*2];
 795         int i;
 796
 797         if( passwd->bv_len != LUTIL_MD5_BYTES*2 ) {
 798                 return 1;
 799         }
 800
 801         /* hash credentials with salt */
 802         lutil_MD5Init(&MD5context);
 803         lutil_MD5Update(&MD5context,
 804                 (const unsigned char *) &passwd->bv_val[32],
 805                 32 );
 806
 807         c = 0x59;
 808         lutil_MD5Update(&MD5context,
 809                 (const unsigned char *) &c,
 810                 1 );
 811
 812         lutil_MD5Update(&MD5context,
 813                 (const unsigned char *) cred->bv_val,
 814                 cred->bv_len );
 815
 816         c = 0xF7;
 817         lutil_MD5Update(&MD5context,
 818                 (const unsigned char *) &c,
 819                 1 );
 820
 821         lutil_MD5Update(&MD5context,
 822                 (const unsigned char *) &passwd->bv_val[32],
 823                 32 );
 824
 825         lutil_MD5Final(MD5digest, &MD5context);
 826
 827         for( i=0; i < sizeof( MD5digest ); i++ ) {
 828                 buffer[i+i]   = "0123456789abcdef"[(MD5digest[i]>>4) & 0x0F];
 829                 buffer[i+i+1] = "0123456789abcdef"[ MD5digest[i] & 0x0F];
 830         }
 831
 832         /* compare */
 833         return memcmp((char *)passwd->bv_val,
 834                 (char *)buffer, sizeof(buffer)) ? 1 : 0;
 835 }
 836 #endif
 837
 838 #ifdef SLAPD_SPASSWD
 839 #ifdef HAVE_CYRUS_SASL
 840 sasl_conn_t *lutil_passwd_sasl_conn = NULL;
 841 #endif
 842
 843 static int chk_sasl(
 844         const struct berval *sc,
 845         const struct berval * passwd,
 846         const struct berval * cred,
 847         const char **text )
 848 {
 849         unsigned int i;
 850         int rtn;
 851
 852         for( i=0; i<cred->bv_len; i++) {
 853                 if(cred->bv_val[i] == '\0') {
 854                         return 1;       /* NUL character in password */
 855                 }
 856         }
 857
 858         if( cred->bv_val[i] != '\0' ) {
 859                 return 1;       /* cred must behave like a string */
 860         }
 861
 862         for( i=0; i<passwd->bv_len; i++) {
 863                 if(passwd->bv_val[i] == '\0') {
 864                         return 1;       /* NUL character in password */
 865                 }
 866         }
 867
 868         if( passwd->bv_val[i] != '\0' ) {
 869                 return 1;       /* passwd must behave like a string */
 870         }
 871
 872         rtn = 1;
 873
 874 #ifdef HAVE_CYRUS_SASL
 875         if( lutil_passwd_sasl_conn != NULL ) {
 876                 int sc;
 877 # if SASL_VERSION_MAJOR < 2
 878                 sc = sasl_checkpass( lutil_passwd_sasl_conn,
 879                         passwd->bv_val, passwd->bv_len,
 880                         cred->bv_val, cred->bv_len,
 881                         text );
 882 # else
 883                 sc = sasl_checkpass( lutil_passwd_sasl_conn,
 884                         passwd->bv_val, passwd->bv_len,
 885                         cred->bv_val, cred->bv_len );
 886 # endif
 887                 rtn = ( sc != SASL_OK );
 888         }
 889 #endif
 890
 891         return rtn;
 892 }
 893 #endif
 894
 895 #ifdef SLAPD_KPASSWD
 896 static int chk_kerberos(
 897         const struct berval *sc,
 898         const struct berval * passwd,
 899         const struct berval * cred,
 900         const char **text )
 901 {
 902         unsigned int i;
 903         int rtn;
 904
 905         for( i=0; i<cred->bv_len; i++) {
 906                 if(cred->bv_val[i] == '\0') {
 907                         return 1;       /* NUL character in password */
 908                 }
 909         }
 910
 911         if( cred->bv_val[i] != '\0' ) {
 912                 return 1;       /* cred must behave like a string */
 913         }
 914
 915         for( i=0; i<passwd->bv_len; i++) {
 916                 if(passwd->bv_val[i] == '\0') {
 917                         return 1;       /* NUL character in password */
 918                 }
 919         }
 920
 921         if( passwd->bv_val[i] != '\0' ) {
 922                 return 1;       /* passwd must behave like a string */
 923         }
 924
 925         rtn = 1;
 926
 927 #ifdef HAVE_KRB5 /* HAVE_HEIMDAL_KRB5 */
 928         {
 929 /* Portions:
 930  * Copyright (c) 1997, 1998, 1999 Kungliga Tekniska H\xf6gskolan
 931  * (Royal Institute of Technology, Stockholm, Sweden).
 932  * All rights reserved.
 933  *
 934  * Redistribution and use in source and binary forms, with or without
 935  * modification, are permitted provided that the following conditions
 936  * are met:
 937  *
 938  * 1. Redistributions of source code must retain the above copyright
 939  *    notice, this list of conditions and the following disclaimer.
 940  *
 941  * 2. Redistributions in binary form must reproduce the above copyright
 942  *    notice, this list of conditions and the following disclaimer in the
 943  *    documentation and/or other materials provided with the distribution.
 944  *
 945  * 3. Neither the name of the Institute nor the names of its contributors
 946  *    may be used to endorse or promote products derived from this software
 947  *    without specific prior written permission.
 948  *
 949  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 950  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 951  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 952  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 953  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 954  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 955  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 956  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 957  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 958  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 959  * SUCH DAMAGE.
 960  */
 961
 962                 krb5_context context;
 963                 krb5_error_code ret;
 964                 krb5_creds creds;
 965                 krb5_get_init_creds_opt get_options;
 966                 krb5_verify_init_creds_opt verify_options;
 967                 krb5_principal client, server;
 968 #ifdef notdef
 969                 krb5_preauthtype pre_auth_types[] = {KRB5_PADATA_ENC_TIMESTAMP};
 970 #endif
 971
 972                 ret = krb5_init_context( &context );
 973                 if (ret) {
 974                         return 1;
 975                 }
 976
 977 #ifdef notdef
 978                 krb5_get_init_creds_opt_set_preauth_list(&get_options,
 979                         pre_auth_types, 1);
 980 #endif
 981
 982                 krb5_get_init_creds_opt_init( &get_options );
 983
 984                 krb5_verify_init_creds_opt_init( &verify_options );
 985
 986                 ret = krb5_parse_name( context, passwd->bv_val, &client );
 987
 988                 if (ret) {
 989                         krb5_free_context( context );
 990                         return 1;
 991                 }
 992
 993                 ret = krb5_get_init_creds_password( context,
 994                         &creds, client, cred->bv_val, NULL,
 995                         NULL, 0, NULL, &get_options );
 996
 997                 if (ret) {
 998                         krb5_free_principal( context, client );
 999                         krb5_free_context( context );
1000                         return 1;
1001                 }
1002
1003                 {
1004                         char *host = ldap_pvt_get_fqdn( NULL );
1005
1006                         if( host == NULL ) {
1007                                 krb5_free_principal( context, client );
1008                                 krb5_free_context( context );
1009                                 return 1;
1010                         }
1011
1012                         ret = krb5_sname_to_principal( context,
1013                                 host, "ldap", KRB5_NT_SRV_HST, &server );
1014
1015                         ber_memfree( host );
1016                 }
1017
1018                 if (ret) {
1019                         krb5_free_principal( context, client );
1020                         krb5_free_context( context );
1021                         return 1;
1022                 }
1023
1024                 ret = krb5_verify_init_creds( context,
1025                         &creds, server, NULL, NULL, &verify_options );
1026
1027                 krb5_free_principal( context, client );
1028                 krb5_free_principal( context, server );
1029                 krb5_free_cred_contents( context, &creds );
1030                 krb5_free_context( context );
1031
1032                 rtn = !!ret;
1033         }
1034 #elif   defined(HAVE_KRB4)
1035         {
1036                 /* Borrowed from Heimdal kpopper */
1037 /* Portions:
1038  * Copyright (c) 1989 Regents of the University of California.
1039  * All rights reserved.  The Berkeley software License Agreement
1040  * specifies the terms and conditions for redistribution.
1041  */
1042
1043                 int status;
1044                 char lrealm[REALM_SZ];
1045                 char tkt[MAXHOSTNAMELEN];
1046
1047                 status = krb_get_lrealm(lrealm,1);
1048                 if (status == KFAILURE) {
1049                         return 1;
1050                 }
1051
1052                 snprintf(tkt, sizeof(tkt), "%s_slapd.%u",
1053                         TKT_ROOT, (unsigned)getpid());
1054                 krb_set_tkt_string (tkt);
1055
1056                 status = krb_verify_user( passwd->bv_val, "", lrealm,
1057                         cred->bv_val, 1, "ldap");
1058
1059                 dest_tkt(); /* no point in keeping the tickets */
1060
1061                 return status == KFAILURE;
1062         }
1063 #endif
1064
1065         return rtn;
1066 }
1067 #endif /* SLAPD_KPASSWD */
1068
1069 #ifdef SLAPD_CRYPT
1070 static int chk_crypt(
1071         const struct berval *sc,
1072         const struct berval * passwd,
1073         const struct berval * cred,
1074         const char **text )
1075 {
1076         char *cr;
1077         unsigned int i;
1078
1079         for( i=0; i<cred->bv_len; i++) {
1080                 if(cred->bv_val[i] == '\0') {
1081                         return 1;       /* NUL character in password */
1082                 }
1083         }
1084
1085         if( cred->bv_val[i] != '\0' ) {
1086                 return -1;      /* cred must behave like a string */
1087         }
1088
1089         if( passwd->bv_len < 2 ) {
1090                 return -1;      /* passwd must be at least two characters long */
1091         }
1092
1093         for( i=0; i<passwd->bv_len; i++) {
1094                 if(passwd->bv_val[i] == '\0') {
1095                         return -1;      /* NUL character in password */
1096                 }
1097         }
1098
1099         if( passwd->bv_val[i] != '\0' ) {
1100                 return -1;      /* passwd must behave like a string */
1101         }
1102
1103         cr = crypt( cred->bv_val, passwd->bv_val );
1104
1105         if( cr == NULL || cr[0] == '\0' ) {
1106                 /* salt must have been invalid */
1107                 return -1;
1108         }
1109
1110         return strcmp( passwd->bv_val, cr ) ? 1 : 0;
1111 }
1112
1113 # if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
1114 static int chk_unix(
1115         const struct berval *sc,
1116         const struct berval * passwd,
1117         const struct berval * cred,
1118         const char **text )
1119 {
1120         unsigned int i;
1121         char *pw,*cr;
1122
1123         for( i=0; i<cred->bv_len; i++) {
1124                 if(cred->bv_val[i] == '\0') {
1125                         return -1;      /* NUL character in password */
1126                 }
1127         }
1128         if( cred->bv_val[i] != '\0' ) {
1129                 return -1;      /* cred must behave like a string */
1130         }
1131
1132         for( i=0; i<passwd->bv_len; i++) {
1133                 if(passwd->bv_val[i] == '\0') {
1134                         return -1;      /* NUL character in password */
1135                 }
1136         }
1137
1138         if( passwd->bv_val[i] != '\0' ) {
1139                 return -1;      /* passwd must behave like a string */
1140         }
1141
1142         {
1143                 struct passwd *pwd = getpwnam(passwd->bv_val);
1144
1145                 if(pwd == NULL) {
1146                         return -1;      /* not found */
1147                 }
1148
1149                 pw = pwd->pw_passwd;
1150         }
1151 #  ifdef HAVE_GETSPNAM
1152         {
1153                 struct spwd *spwd = getspnam(passwd->bv_val);
1154
1155                 if(spwd != NULL) {
1156                         pw = spwd->sp_pwdp;
1157                 }
1158         }
1159 #  endif
1160 #  ifdef HAVE_AIX_SECURITY
1161         {
1162                 struct userpw *upw = getuserpw(passwd->bv_val);
1163
1164                 if (upw != NULL) {
1165                         pw = upw->upw_passwd;
1166                 }
1167         }
1168 #  endif
1169
1170         if( pw == NULL || pw[0] == '\0' || pw[1] == '\0' ) {
1171                 /* password must must be at least two characters long */
1172                 return -1;
1173         }
1174
1175         cr = crypt(cred->bv_val, pw);
1176
1177         if( cr == NULL || cr[0] == '\0' ) {
1178                 /* salt must have been invalid */
1179                 return -1;
1180         }
1181
1182         return strcmp(pw, cr) ? 1 : 0;
1183
1184 }
1185 # endif
1186 #endif
1187
1188 /* PASSWORD GENERATION ROUTINES */
1189
1190 #ifdef LUTIL_SHA1_BYTES
1191 static struct berval *hash_ssha1(
1192         const struct berval *scheme,
1193         const struct berval  *passwd,
1194         const char **text )
1195 {
1196         lutil_SHA1_CTX  SHA1context;
1197         unsigned char   SHA1digest[LUTIL_SHA1_BYTES];
1198         char            saltdata[SALT_SIZE];
1199         struct berval digest;
1200         struct berval salt;
1201
1202         digest.bv_val = (char *) SHA1digest;
1203         digest.bv_len = sizeof(SHA1digest);
1204         salt.bv_val = saltdata;
1205         salt.bv_len = sizeof(saltdata);
1206
1207         if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) {
1208                 return NULL;
1209         }
1210
1211         lutil_SHA1Init( &SHA1context );
1212         lutil_SHA1Update( &SHA1context,
1213                 (const unsigned char *)passwd->bv_val, passwd->bv_len );
1214         lutil_SHA1Update( &SHA1context,
1215                 (const unsigned char *)salt.bv_val, salt.bv_len );
1216         lutil_SHA1Final( SHA1digest, &SHA1context );
1217
1218         return pw_string64( scheme, &digest, &salt);
1219 }
1220
1221 static struct berval *hash_sha1(
1222         const struct berval *scheme,
1223         const struct berval  *passwd,
1224         const char **text )
1225 {
1226         lutil_SHA1_CTX  SHA1context;
1227         unsigned char   SHA1digest[LUTIL_SHA1_BYTES];
1228         struct berval digest;
1229         digest.bv_val = (char *) SHA1digest;
1230         digest.bv_len = sizeof(SHA1digest);
1231
1232         lutil_SHA1Init( &SHA1context );
1233         lutil_SHA1Update( &SHA1context,
1234                 (const unsigned char *)passwd->bv_val, passwd->bv_len );
1235         lutil_SHA1Final( SHA1digest, &SHA1context );
1236
1237         return pw_string64( scheme, &digest, NULL);
1238 }
1239 #endif
1240
1241 static struct berval *hash_smd5(
1242         const struct berval *scheme,
1243         const struct berval  *passwd,
1244         const char **text )
1245 {
1246         lutil_MD5_CTX   MD5context;
1247         unsigned char   MD5digest[LUTIL_MD5_BYTES];
1248         char            saltdata[SALT_SIZE];
1249         struct berval digest;
1250         struct berval salt;
1251
1252         digest.bv_val = (char *) MD5digest;
1253         digest.bv_len = sizeof(MD5digest);
1254         salt.bv_val = saltdata;
1255         salt.bv_len = sizeof(saltdata);
1256
1257         if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) {
1258                 return NULL;
1259         }
1260
1261         lutil_MD5Init( &MD5context );
1262         lutil_MD5Update( &MD5context,
1263                 (const unsigned char *) passwd->bv_val, passwd->bv_len );
1264         lutil_MD5Update( &MD5context,
1265                 (const unsigned char *) salt.bv_val, salt.bv_len );
1266         lutil_MD5Final( MD5digest, &MD5context );
1267
1268         return pw_string64( scheme, &digest, &salt );
1269 }
1270
1271 static struct berval *hash_md5(
1272         const struct berval *scheme,
1273         const struct berval  *passwd,
1274         const char **text )
1275 {
1276         lutil_MD5_CTX   MD5context;
1277         unsigned char   MD5digest[LUTIL_MD5_BYTES];
1278
1279         struct berval digest;
1280
1281         digest.bv_val = (char *) MD5digest;
1282         digest.bv_len = sizeof(MD5digest);
1283
1284         lutil_MD5Init( &MD5context );
1285         lutil_MD5Update( &MD5context,
1286                 (const unsigned char *) passwd->bv_val, passwd->bv_len );
1287         lutil_MD5Final( MD5digest, &MD5context );
1288
1289         return pw_string64( scheme, &digest, NULL );
1290 ;
1291 }
1292
1293 #ifdef SLAPD_LMHASH
1294 static struct berval *hash_lanman(
1295         const struct berval *scheme,
1296         const struct berval *passwd,
1297         const char **text )
1298 {
1299
1300         int i;
1301         char UcasePassword[15];
1302         des_cblock key;
1303         des_key_schedule schedule;
1304         des_cblock StdText = "KGS!@#$%";
1305         des_cblock PasswordHash1, PasswordHash2;
1306         char PasswordHash[33];
1307         struct berval hash;
1308
1309         for( i=0; i<passwd->bv_len; i++) {
1310                 if(passwd->bv_val[i] == '\0') {
1311                         return NULL;    /* NUL character in password */
1312                 }
1313         }
1314
1315         if( passwd->bv_val[i] != '\0' ) {
1316                 return NULL;    /* passwd must behave like a string */
1317         }
1318
1319         strncpy( UcasePassword, passwd->bv_val, 14 );
1320         UcasePassword[14] = '\0';
1321         ldap_pvt_str2upper( UcasePassword );
1322
1323         lmPasswd_to_key( UcasePassword, &key );
1324         des_set_key_unchecked( &key, schedule );
1325         des_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT );
1326
1327         lmPasswd_to_key( &UcasePassword[7], &key );
1328         des_set_key_unchecked( &key, schedule );
1329         des_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT );
1330
1331         sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
1332                 PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3],
1333                 PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7],
1334                 PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3],
1335                 PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] );
1336
1337         hash.bv_val = PasswordHash;
1338         hash.bv_len = 32;
1339
1340         return pw_string( scheme, &hash );
1341 }
1342 #endif /* SLAPD_LMHASH */
1343
1344 #ifdef SLAPD_CRYPT
1345 static struct berval *hash_crypt(
1346         const struct berval *scheme,
1347         const struct berval *passwd,
1348         const char **text )
1349 {
1350         struct berval hash;
1351         unsigned char salt[32]; /* salt suitable for most anything */
1352         unsigned int i;
1353
1354         for( i=0; i<passwd->bv_len; i++) {
1355                 if(passwd->bv_val[i] == '\0') {
1356                         return NULL;    /* NUL character in password */
1357                 }
1358         }
1359
1360         if( passwd->bv_val[i] != '\0' ) {
1361                 return NULL;    /* passwd must behave like a string */
1362         }
1363
1364         if( lutil_entropy( salt, sizeof( salt ) ) < 0 ) {
1365                 return NULL;
1366         }
1367
1368         for( i=0; i< ( sizeof(salt) - 1 ); i++ ) {
1369                 salt[i] = crypt64[ salt[i] % (sizeof(crypt64)-1) ];
1370         }
1371         salt[sizeof( salt ) - 1 ] = '\0';
1372
1373         if( salt_format != NULL ) {
1374                 /* copy the salt we made into entropy before snprintfing
1375                    it back into the salt */
1376                 char entropy[sizeof(salt)];
1377                 strcpy( entropy, (char *) salt );
1378                 snprintf( (char *) salt, sizeof(entropy), salt_format, entropy );
1379         }
1380
1381         hash.bv_val = crypt( passwd->bv_val, (char *) salt );
1382
1383         if( hash.bv_val == NULL ) return NULL;
1384
1385         hash.bv_len = strlen( hash.bv_val );
1386
1387         if( hash.bv_len == 0 ) {
1388                 return NULL;
1389         }
1390
1391         return pw_string( scheme, &hash );
1392 }
1393 #endif
1394
1395 int lutil_salt_format(const char *format)
1396 {
1397 #ifdef SLAPD_CRYPT
1398         free( salt_format );
1399
1400         salt_format = format != NULL ? strdup( format ) : NULL;
1401 #endif
1402
1403         return 0;
1404 }
1405
1406 #ifdef SLAPD_CLEARTEXT
1407 static struct berval *hash_clear(
1408         const struct berval *scheme,
1409         const struct berval  *passwd,
1410         const char **text )
1411 {
1412         return ber_bvdup( (struct berval *) passwd );
1413 }
1414 #endif
1415