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 1998-2005 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 #if defined(SLAPD_LMHASH)
  37 #       include <openssl/des.h>
  38 #endif /* SLAPD_LMHASH */
  39
  40 #include <ac/param.h>
  41
  42 #ifdef SLAPD_CRYPT
  43 # include <ac/crypt.h>
  44
  45 # if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD )
  46 #  ifdef HAVE_SHADOW_H
  47 #       include <shadow.h>
  48 #  endif
  49 #  ifdef HAVE_PWD_H
  50 #       include <pwd.h>
  51 #  endif
  52 #  ifdef HAVE_AIX_SECURITY
  53 #       include <userpw.h>
  54 #  endif
  55 # endif
  56 #endif
  57
  58 #include <lber.h>
  59
  60 #include "ldap_pvt.h"
  61 #include "lber_pvt.h"
  62
  63 #include "lutil_md5.h"
  64 #include "lutil_sha1.h"
  65 #include "lutil.h"
  66
  67 static const unsigned char crypt64[] =
  68         "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890./";
  69
  70 #ifdef SLAPD_CRYPT
  71 static char *salt_format = NULL;
  72 static lutil_cryptfunc lutil_crypt;
  73 lutil_cryptfunc *lutil_cryptptr = lutil_crypt;
  74 #endif
  75
  76 struct pw_scheme {
  77         struct berval name;
  78         LUTIL_PASSWD_CHK_FUNC *chk_fn;
  79         LUTIL_PASSWD_HASH_FUNC *hash_fn;
  80 };
  81
  82 struct pw_slist {
  83         struct pw_slist *next;
  84         struct pw_scheme s;
  85 };
  86
  87 /* password check routines */
  88
  89 #define SALT_SIZE       4
  90
  91 static LUTIL_PASSWD_CHK_FUNC chk_md5;
  92 static LUTIL_PASSWD_CHK_FUNC chk_smd5;
  93 static LUTIL_PASSWD_HASH_FUNC hash_smd5;
  94 static LUTIL_PASSWD_HASH_FUNC hash_md5;
  95
  96
  97 #ifdef LUTIL_SHA1_BYTES
  98 static LUTIL_PASSWD_CHK_FUNC chk_ssha1;
  99 static LUTIL_PASSWD_CHK_FUNC chk_sha1;
 100 static LUTIL_PASSWD_HASH_FUNC hash_sha1;
 101 static LUTIL_PASSWD_HASH_FUNC hash_ssha1;
 102 #endif
 103
 104 #ifdef SLAPD_LMHASH
 105 static LUTIL_PASSWD_CHK_FUNC chk_lanman;
 106 static LUTIL_PASSWD_HASH_FUNC hash_lanman;
 107 #endif
 108
 109 #ifdef SLAPD_CRYPT
 110 static LUTIL_PASSWD_CHK_FUNC chk_crypt;
 111 static LUTIL_PASSWD_HASH_FUNC hash_crypt;
 112
 113 #if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD )
 114 static LUTIL_PASSWD_CHK_FUNC chk_unix;
 115 #endif
 116 #endif
 117
 118 /* password hash routines */
 119
 120 #ifdef SLAPD_CLEARTEXT
 121 static LUTIL_PASSWD_HASH_FUNC hash_clear;
 122 #endif
 123
 124 static struct pw_slist *pw_schemes;
 125 static int pw_inited;
 126
 127 static const struct pw_scheme pw_schemes_default[] =
 128 {
 129 #ifdef LUTIL_SHA1_BYTES
 130         { BER_BVC("{SSHA}"),            chk_ssha1, hash_ssha1 },
 131         { BER_BVC("{SHA}"),                     chk_sha1, hash_sha1 },
 132 #endif
 133
 134         { BER_BVC("{SMD5}"),            chk_smd5, hash_smd5 },
 135         { BER_BVC("{MD5}"),                     chk_md5, hash_md5 },
 136
 137 #ifdef SLAPD_LMHASH
 138         { BER_BVC("{LANMAN}"),          chk_lanman, hash_lanman },
 139 #endif /* SLAPD_LMHASH */
 140
 141 #ifdef SLAPD_CRYPT
 142         { BER_BVC("{CRYPT}"),           chk_crypt, hash_crypt },
 143 # if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD )
 144         { BER_BVC("{UNIX}"),            chk_unix, NULL },
 145 # endif
 146 #endif
 147
 148 #ifdef SLAPD_CLEARTEXT
 149         /* pseudo scheme */
 150         { {0, "{CLEARTEXT}"},           NULL, hash_clear },
 151 #endif
 152
 153         { BER_BVNULL, NULL, NULL }
 154 };
 155
 156 int lutil_passwd_add(
 157         struct berval *scheme,
 158         LUTIL_PASSWD_CHK_FUNC *chk,
 159         LUTIL_PASSWD_HASH_FUNC *hash )
 160 {
 161         struct pw_slist *ptr;
 162
 163         if (!pw_inited) lutil_passwd_init();
 164
 165         ptr = ber_memalloc( sizeof( struct pw_slist ));
 166         if (!ptr) return -1;
 167         ptr->next = pw_schemes;
 168         ptr->s.name = *scheme;
 169         ptr->s.chk_fn = chk;
 170         ptr->s.hash_fn = hash;
 171         pw_schemes = ptr;
 172         return 0;
 173 }
 174
 175 void lutil_passwd_init()
 176 {
 177         struct pw_scheme *s;
 178
 179         pw_inited = 1;
 180
 181         for( s=(struct pw_scheme *)pw_schemes_default; s->name.bv_val; s++) {
 182                 if ( lutil_passwd_add( &s->name, s->chk_fn, s->hash_fn ) ) break;
 183         }
 184 }
 185
 186 void lutil_passwd_destroy()
 187 {
 188         struct pw_slist *ptr, *next;
 189
 190         for( ptr=pw_schemes; ptr; ptr=next ) {
 191                 next = ptr->next;
 192                 ber_memfree( ptr );
 193         }
 194 }
 195
 196 static const struct pw_scheme *get_scheme(
 197         const char* scheme )
 198 {
 199         struct pw_slist *pws;
 200         struct berval bv;
 201
 202         if (!pw_inited) lutil_passwd_init();
 203
 204         bv.bv_val = strchr( scheme, '}' );
 205         if ( !bv.bv_val )
 206                 return NULL;
 207
 208         bv.bv_len = bv.bv_val - scheme + 1;
 209         bv.bv_val = (char *) scheme;
 210
 211         for( pws=pw_schemes; pws; pws=pws->next ) {
 212                 if ( ber_bvstrcasecmp(&bv, &pws->s.name ) == 0 ) {
 213                         return &(pws->s);
 214                 }
 215         }
 216
 217         return NULL;
 218 }
 219
 220 int lutil_passwd_scheme(
 221         const char* scheme )
 222 {
 223         if( scheme == NULL ) {
 224                 return 0;
 225         }
 226
 227         return get_scheme(scheme) != NULL;
 228 }
 229
 230
 231 static int is_allowed_scheme(
 232         const char* scheme,
 233         const char** schemes )
 234 {
 235         int i;
 236
 237         if( schemes == NULL ) return 1;
 238
 239         for( i=0; schemes[i] != NULL; i++ ) {
 240                 if( strcasecmp( scheme, schemes[i] ) == 0 ) {
 241                         return 1;
 242                 }
 243         }
 244         return 0;
 245 }
 246
 247 static struct berval *passwd_scheme(
 248         const struct pw_scheme *scheme,
 249         const struct berval * passwd,
 250         struct berval *bv,
 251         const char** allowed )
 252 {
 253         if( !is_allowed_scheme( scheme->name.bv_val, allowed ) ) {
 254                 return NULL;
 255         }
 256
 257         if( passwd->bv_len >= scheme->name.bv_len ) {
 258                 if( strncasecmp( passwd->bv_val, scheme->name.bv_val, scheme->name.bv_len ) == 0 ) {
 259                         bv->bv_val = &passwd->bv_val[scheme->name.bv_len];
 260                         bv->bv_len = passwd->bv_len - scheme->name.bv_len;
 261
 262                         return bv;
 263                 }
 264         }
 265
 266         return NULL;
 267 }
 268
 269 /*
 270  * Return 0 if creds are good.
 271  */
 272 int
 273 lutil_passwd(
 274         const struct berval *passwd,    /* stored passwd */
 275         const struct berval *cred,              /* user cred */
 276         const char **schemes,
 277         const char **text )
 278 {
 279         struct pw_slist *pws;
 280
 281         if ( text ) *text = NULL;
 282
 283         if (cred == NULL || cred->bv_len == 0 ||
 284                 passwd == NULL || passwd->bv_len == 0 )
 285         {
 286                 return -1;
 287         }
 288
 289         if (!pw_inited) lutil_passwd_init();
 290
 291         for( pws=pw_schemes; pws; pws=pws->next ) {
 292                 if( pws->s.chk_fn ) {
 293                         struct berval x;
 294                         struct berval *p = passwd_scheme( &(pws->s),
 295                                 passwd, &x, schemes );
 296
 297                         if( p != NULL ) {
 298                                 return (pws->s.chk_fn)( &(pws->s.name), p, cred, text );
 299                         }
 300                 }
 301         }
 302
 303 #ifdef SLAPD_CLEARTEXT
 304         /* Do we think there is a scheme specifier here that we
 305          * didn't recognize? Assume a scheme name is at least 1 character.
 306          */
 307         if (( passwd->bv_val[0] == '{' ) &&
 308                 ( strchr( passwd->bv_val, '}' ) > passwd->bv_val+1 ))
 309                 return 1;
 310         if( is_allowed_scheme("{CLEARTEXT}", schemes ) ) {
 311                 return ( passwd->bv_len == cred->bv_len ) ?
 312                         memcmp( passwd->bv_val, cred->bv_val, passwd->bv_len )
 313                         : 1;
 314         }
 315 #endif
 316         return 1;
 317 }
 318
 319 int lutil_passwd_generate( struct berval *pw, ber_len_t len )
 320 {
 321
 322         if( len < 1 ) return -1;
 323
 324         pw->bv_len = len;
 325         pw->bv_val = ber_memalloc( len + 1 );
 326
 327         if( pw->bv_val == NULL ) {
 328                 return -1;
 329         }
 330
 331         if( lutil_entropy( (unsigned char *) pw->bv_val, pw->bv_len) < 0 ) {
 332                 return -1;
 333         }
 334
 335         for( len = 0; len < pw->bv_len; len++ ) {
 336                 pw->bv_val[len] = crypt64[
 337                         pw->bv_val[len] % (sizeof(crypt64)-1) ];
 338         }
 339
 340         pw->bv_val[len] = '\0';
 341
 342         return 0;
 343 }
 344
 345 int lutil_passwd_hash(
 346         const struct berval * passwd,
 347         const char * method,
 348         struct berval *hash,
 349         const char **text )
 350 {
 351         const struct pw_scheme *sc = get_scheme( method );
 352
 353         hash->bv_val = NULL;
 354         hash->bv_len = 0;
 355
 356         if( sc == NULL ) {
 357                 if( text ) *text = "scheme not recognized";
 358                 return -1;
 359         }
 360
 361         if( ! sc->hash_fn ) {
 362                 if( text ) *text = "scheme provided no hash function";
 363                 return -1;
 364         }
 365
 366         if( text ) *text = NULL;
 367
 368         return (sc->hash_fn)( &sc->name, passwd, hash, text );
 369 }
 370
 371 /* pw_string is only called when SLAPD_LMHASH or SLAPD_CRYPT is defined */
 372 #if defined(SLAPD_LMHASH) || defined(SLAPD_CRYPT)
 373 static int pw_string(
 374         const struct berval *sc,
 375         struct berval *passwd )
 376 {
 377         struct berval pw;
 378
 379         pw.bv_len = sc->bv_len + passwd->bv_len;
 380         pw.bv_val = ber_memalloc( pw.bv_len + 1 );
 381
 382         if( pw.bv_val == NULL ) {
 383                 return LUTIL_PASSWD_ERR;
 384         }
 385
 386         AC_MEMCPY( pw.bv_val, sc->bv_val, sc->bv_len );
 387         AC_MEMCPY( &pw.bv_val[sc->bv_len], passwd->bv_val, passwd->bv_len );
 388
 389         pw.bv_val[pw.bv_len] = '\0';
 390         *passwd = pw;
 391
 392         return LUTIL_PASSWD_OK;
 393 }
 394 #endif /* SLAPD_LMHASH || SLAPD_CRYPT */
 395
 396 static int pw_string64(
 397         const struct berval *sc,
 398         const struct berval *hash,
 399         struct berval *b64,
 400         const struct berval *salt )
 401 {
 402         int rc;
 403         struct berval string;
 404         size_t b64len;
 405
 406         if( salt ) {
 407                 /* need to base64 combined string */
 408                 string.bv_len = hash->bv_len + salt->bv_len;
 409                 string.bv_val = ber_memalloc( string.bv_len + 1 );
 410
 411                 if( string.bv_val == NULL ) {
 412                         return LUTIL_PASSWD_ERR;
 413                 }
 414
 415                 AC_MEMCPY( string.bv_val, hash->bv_val,
 416                         hash->bv_len );
 417                 AC_MEMCPY( &string.bv_val[hash->bv_len], salt->bv_val,
 418                         salt->bv_len );
 419                 string.bv_val[string.bv_len] = '\0';
 420
 421         } else {
 422                 string = *hash;
 423         }
 424
 425         b64len = LUTIL_BASE64_ENCODE_LEN( string.bv_len ) + 1;
 426         b64->bv_len = b64len + sc->bv_len;
 427         b64->bv_val = ber_memalloc( b64->bv_len + 1 );
 428
 429         if( b64->bv_val == NULL ) {
 430                 if( salt ) ber_memfree( string.bv_val );
 431                 return LUTIL_PASSWD_ERR;
 432         }
 433
 434         AC_MEMCPY(b64->bv_val, sc->bv_val, sc->bv_len);
 435
 436         rc = lutil_b64_ntop(
 437                 (unsigned char *) string.bv_val, string.bv_len,
 438                 &b64->bv_val[sc->bv_len], b64len );
 439
 440         if( salt ) ber_memfree( string.bv_val );
 441
 442         if( rc < 0 ) {
 443                 return LUTIL_PASSWD_ERR;
 444         }
 445
 446         /* recompute length */
 447         b64->bv_len = sc->bv_len + rc;
 448         assert( strlen(b64->bv_val) == b64->bv_len );
 449         return LUTIL_PASSWD_OK;
 450 }
 451
 452 /* PASSWORD CHECK ROUTINES */
 453
 454 #ifdef LUTIL_SHA1_BYTES
 455 static int chk_ssha1(
 456         const struct berval *sc,
 457         const struct berval * passwd,
 458         const struct berval * cred,
 459         const char **text )
 460 {
 461         lutil_SHA1_CTX SHA1context;
 462         unsigned char SHA1digest[LUTIL_SHA1_BYTES];
 463         int rc;
 464         unsigned char *orig_pass = NULL;
 465
 466         /* safety check -- must have some salt */
 467         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <= sizeof(SHA1digest)) {
 468                 return LUTIL_PASSWD_ERR;
 469         }
 470
 471         /* decode base64 password */
 472         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 473                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 474
 475         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 476
 477         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 478
 479         /* safety check -- must have some salt */
 480         if (rc <= (int)(sizeof(SHA1digest))) {
 481                 ber_memfree(orig_pass);
 482                 return LUTIL_PASSWD_ERR;
 483         }
 484
 485         /* hash credentials with salt */
 486         lutil_SHA1Init(&SHA1context);
 487         lutil_SHA1Update(&SHA1context,
 488                 (const unsigned char *) cred->bv_val, cred->bv_len);
 489         lutil_SHA1Update(&SHA1context,
 490                 (const unsigned char *) &orig_pass[sizeof(SHA1digest)],
 491                 rc - sizeof(SHA1digest));
 492         lutil_SHA1Final(SHA1digest, &SHA1context);
 493
 494         /* compare */
 495         rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
 496         ber_memfree(orig_pass);
 497         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 498 }
 499
 500 static int chk_sha1(
 501         const struct berval *sc,
 502         const struct berval * passwd,
 503         const struct berval * cred,
 504         const char **text )
 505 {
 506         lutil_SHA1_CTX SHA1context;
 507         unsigned char SHA1digest[LUTIL_SHA1_BYTES];
 508         int rc;
 509         unsigned char *orig_pass = NULL;
 510
 511         /* safety check */
 512         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) < sizeof(SHA1digest)) {
 513                 return LUTIL_PASSWD_ERR;
 514         }
 515
 516         /* base64 un-encode password */
 517         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 518                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 519
 520         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 521
 522         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 523
 524         if( rc != sizeof(SHA1digest) ) {
 525                 ber_memfree(orig_pass);
 526                 return LUTIL_PASSWD_ERR;
 527         }
 528
 529         /* hash credentials with salt */
 530         lutil_SHA1Init(&SHA1context);
 531         lutil_SHA1Update(&SHA1context,
 532                 (const unsigned char *) cred->bv_val, cred->bv_len);
 533         lutil_SHA1Final(SHA1digest, &SHA1context);
 534
 535         /* compare */
 536         rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
 537         ber_memfree(orig_pass);
 538         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 539 }
 540 #endif
 541
 542 static int chk_smd5(
 543         const struct berval *sc,
 544         const struct berval * passwd,
 545         const struct berval * cred,
 546         const char **text )
 547 {
 548         lutil_MD5_CTX MD5context;
 549         unsigned char MD5digest[LUTIL_MD5_BYTES];
 550         int rc;
 551         unsigned char *orig_pass = NULL;
 552
 553         /* safety check */
 554         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <= sizeof(MD5digest)) {
 555                 return LUTIL_PASSWD_ERR;
 556         }
 557
 558         /* base64 un-encode password */
 559         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 560                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 561
 562         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 563
 564         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 565
 566         if (rc <= (int)(sizeof(MD5digest))) {
 567                 ber_memfree(orig_pass);
 568                 return LUTIL_PASSWD_ERR;
 569         }
 570
 571         /* hash credentials with salt */
 572         lutil_MD5Init(&MD5context);
 573         lutil_MD5Update(&MD5context,
 574                 (const unsigned char *) cred->bv_val,
 575                 cred->bv_len );
 576         lutil_MD5Update(&MD5context,
 577                 &orig_pass[sizeof(MD5digest)],
 578                 rc - sizeof(MD5digest));
 579         lutil_MD5Final(MD5digest, &MD5context);
 580
 581         /* compare */
 582         rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
 583         ber_memfree(orig_pass);
 584         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 585 }
 586
 587 static int chk_md5(
 588         const struct berval *sc,
 589         const struct berval * passwd,
 590         const struct berval * cred,
 591         const char **text )
 592 {
 593         lutil_MD5_CTX MD5context;
 594         unsigned char MD5digest[LUTIL_MD5_BYTES];
 595         int rc;
 596         unsigned char *orig_pass = NULL;
 597
 598         /* safety check */
 599         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) < sizeof(MD5digest)) {
 600                 return LUTIL_PASSWD_ERR;
 601         }
 602
 603         /* base64 un-encode password */
 604         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 605                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 606
 607         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 608
 609         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 610         if ( rc != sizeof(MD5digest) ) {
 611                 ber_memfree(orig_pass);
 612                 return LUTIL_PASSWD_ERR;
 613         }
 614
 615         /* hash credentials with salt */
 616         lutil_MD5Init(&MD5context);
 617         lutil_MD5Update(&MD5context,
 618                 (const unsigned char *) cred->bv_val,
 619                 cred->bv_len );
 620         lutil_MD5Final(MD5digest, &MD5context);
 621
 622         /* compare */
 623         rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
 624         ber_memfree(orig_pass);
 625         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 626 }
 627
 628 #ifdef SLAPD_LMHASH
 629 /* pseudocode from RFC2433
 630  * A.2 LmPasswordHash()
 631  *
 632  *    LmPasswordHash(
 633  *    IN  0-to-14-oem-char Password,
 634  *    OUT 16-octet         PasswordHash )
 635  *    {
 636  *       Set UcasePassword to the uppercased Password
 637  *       Zero pad UcasePassword to 14 characters
 638  *
 639  *       DesHash( 1st 7-octets of UcasePassword,
 640  *                giving 1st 8-octets of PasswordHash )
 641  *
 642  *       DesHash( 2nd 7-octets of UcasePassword,
 643  *                giving 2nd 8-octets of PasswordHash )
 644  *    }
 645  *
 646  *
 647  * A.3 DesHash()
 648  *
 649  *    DesHash(
 650  *    IN  7-octet Clear,
 651  *    OUT 8-octet Cypher )
 652  *    {
 653  *        *
 654  *        * Make Cypher an irreversibly encrypted form of Clear by
 655  *        * encrypting known text using Clear as the secret key.
 656  *        * The known text consists of the string
 657  *        *
 658  *        *              KGS!@#$%
 659  *        *
 660  *
 661  *       Set StdText to "KGS!@#$%"
 662  *       DesEncrypt( StdText, Clear, giving Cypher )
 663  *    }
 664  *
 665  *
 666  * A.4 DesEncrypt()
 667  *
 668  *    DesEncrypt(
 669  *    IN  8-octet Clear,
 670  *    IN  7-octet Key,
 671  *    OUT 8-octet Cypher )
 672  *    {
 673  *        *
 674  *        * Use the DES encryption algorithm [4] in ECB mode [9]
 675  *        * to encrypt Clear into Cypher such that Cypher can
 676  *        * only be decrypted back to Clear by providing Key.
 677  *        * Note that the DES algorithm takes as input a 64-bit
 678  *        * stream where the 8th, 16th, 24th, etc.  bits are
 679  *        * parity bits ignored by the encrypting algorithm.
 680  *        * Unless you write your own DES to accept 56-bit input
 681  *        * without parity, you will need to insert the parity bits
 682  *        * yourself.
 683  *        *
 684  *    }
 685  */
 686
 687 static void lmPasswd_to_key(
 688         const char *lmPasswd,
 689         des_cblock *key)
 690 {
 691         const unsigned char *lpw = (const unsigned char *) lmPasswd;
 692         unsigned char *k = (unsigned char *) key;
 693
 694         /* make room for parity bits */
 695         k[0] = lpw[0];
 696         k[1] = ((lpw[0] & 0x01) << 7) | (lpw[1] >> 1);
 697         k[2] = ((lpw[1] & 0x03) << 6) | (lpw[2] >> 2);
 698         k[3] = ((lpw[2] & 0x07) << 5) | (lpw[3] >> 3);
 699         k[4] = ((lpw[3] & 0x0F) << 4) | (lpw[4] >> 4);
 700         k[5] = ((lpw[4] & 0x1F) << 3) | (lpw[5] >> 5);
 701         k[6] = ((lpw[5] & 0x3F) << 2) | (lpw[6] >> 6);
 702         k[7] = ((lpw[6] & 0x7F) << 1);
 703
 704         des_set_odd_parity( key );
 705 }
 706
 707 static int chk_lanman(
 708         const struct berval *scheme,
 709         const struct berval *passwd,
 710         const struct berval *cred,
 711         const char **text )
 712 {
 713         int i;
 714         char UcasePassword[15];
 715         des_cblock key;
 716         des_key_schedule schedule;
 717         des_cblock StdText = "KGS!@#$%";
 718         des_cblock PasswordHash1, PasswordHash2;
 719         char PasswordHash[33], storedPasswordHash[33];
 720
 721         for( i=0; i<cred->bv_len; i++) {
 722                 if(cred->bv_val[i] == '\0') {
 723                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 724                 }
 725         }
 726
 727         if( cred->bv_val[i] != '\0' ) {
 728                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 729         }
 730
 731         strncpy( UcasePassword, cred->bv_val, 14 );
 732         UcasePassword[14] = '\0';
 733         ldap_pvt_str2upper( UcasePassword );
 734
 735         lmPasswd_to_key( UcasePassword, &key );
 736         des_set_key_unchecked( &key, schedule );
 737         des_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT );
 738
 739         lmPasswd_to_key( &UcasePassword[7], &key );
 740         des_set_key_unchecked( &key, schedule );
 741         des_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT );
 742
 743         sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 744                 PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3],
 745                 PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7],
 746                 PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3],
 747                 PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] );
 748
 749         /* as a precaution convert stored password hash to lower case */
 750         strncpy( storedPasswordHash, passwd->bv_val, 32 );
 751         storedPasswordHash[32] = '\0';
 752         ldap_pvt_str2lower( storedPasswordHash );
 753
 754         return memcmp( PasswordHash, storedPasswordHash, 32) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 755 }
 756 #endif /* SLAPD_LMHASH */
 757
 758 #ifdef SLAPD_CRYPT
 759 static int lutil_crypt(
 760         const char *key,
 761         const char *salt,
 762         char **hash )
 763 {
 764         char *cr = crypt( key, salt );
 765         int rc;
 766
 767         if( cr == NULL || cr[0] == '\0' ) {
 768                 /* salt must have been invalid */
 769                 rc = LUTIL_PASSWD_ERR;
 770         } else {
 771                 if ( hash ) {
 772                         *hash = ber_strdup( cr );
 773                         rc = LUTIL_PASSWD_OK;
 774                 } else {
 775                         rc = strcmp( salt, cr ) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 776                 }
 777         }
 778         return rc;
 779 }
 780
 781 static int chk_crypt(
 782         const struct berval *sc,
 783         const struct berval * passwd,
 784         const struct berval * cred,
 785         const char **text )
 786 {
 787         unsigned int i;
 788
 789         for( i=0; i<cred->bv_len; i++) {
 790                 if(cred->bv_val[i] == '\0') {
 791                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 792                 }
 793         }
 794
 795         if( cred->bv_val[i] != '\0' ) {
 796                 return LUTIL_PASSWD_ERR;        /* cred must behave like a string */
 797         }
 798
 799         if( passwd->bv_len < 2 ) {
 800                 return LUTIL_PASSWD_ERR;        /* passwd must be at least two characters long */
 801         }
 802
 803         for( i=0; i<passwd->bv_len; i++) {
 804                 if(passwd->bv_val[i] == '\0') {
 805                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 806                 }
 807         }
 808
 809         if( passwd->bv_val[i] != '\0' ) {
 810                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 811         }
 812
 813         return lutil_cryptptr( cred->bv_val, passwd->bv_val, NULL );
 814 }
 815
 816 # if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD )
 817 static int chk_unix(
 818         const struct berval *sc,
 819         const struct berval * passwd,
 820         const struct berval * cred,
 821         const char **text )
 822 {
 823         unsigned int i;
 824         char *pw;
 825
 826         for( i=0; i<cred->bv_len; i++) {
 827                 if(cred->bv_val[i] == '\0') {
 828                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 829                 }
 830         }
 831         if( cred->bv_val[i] != '\0' ) {
 832                 return LUTIL_PASSWD_ERR;        /* cred must behave like a string */
 833         }
 834
 835         for( i=0; i<passwd->bv_len; i++) {
 836                 if(passwd->bv_val[i] == '\0') {
 837                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 838                 }
 839         }
 840
 841         if( passwd->bv_val[i] != '\0' ) {
 842                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 843         }
 844
 845         {
 846                 struct passwd *pwd = getpwnam(passwd->bv_val);
 847
 848                 if(pwd == NULL) {
 849                         return LUTIL_PASSWD_ERR;        /* not found */
 850                 }
 851
 852                 pw = pwd->pw_passwd;
 853         }
 854 #  ifdef HAVE_GETSPNAM
 855         {
 856                 struct spwd *spwd = getspnam(passwd->bv_val);
 857
 858                 if(spwd != NULL) {
 859                         pw = spwd->sp_pwdp;
 860                 }
 861         }
 862 #  endif
 863 #  ifdef HAVE_AIX_SECURITY
 864         {
 865                 struct userpw *upw = getuserpw(passwd->bv_val);
 866
 867                 if (upw != NULL) {
 868                         pw = upw->upw_passwd;
 869                 }
 870         }
 871 #  endif
 872
 873         if( pw == NULL || pw[0] == '\0' || pw[1] == '\0' ) {
 874                 /* password must must be at least two characters long */
 875                 return LUTIL_PASSWD_ERR;
 876         }
 877
 878         return lutil_cryptptr( cred->bv_val, pw, NULL );
 879 }
 880 # endif
 881 #endif
 882
 883 /* PASSWORD GENERATION ROUTINES */
 884
 885 #ifdef LUTIL_SHA1_BYTES
 886 static int hash_ssha1(
 887         const struct berval *scheme,
 888         const struct berval  *passwd,
 889         struct berval *hash,
 890         const char **text )
 891 {
 892         lutil_SHA1_CTX  SHA1context;
 893         unsigned char   SHA1digest[LUTIL_SHA1_BYTES];
 894         char            saltdata[SALT_SIZE];
 895         struct berval digest;
 896         struct berval salt;
 897
 898         digest.bv_val = (char *) SHA1digest;
 899         digest.bv_len = sizeof(SHA1digest);
 900         salt.bv_val = saltdata;
 901         salt.bv_len = sizeof(saltdata);
 902
 903         if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) {
 904                 return LUTIL_PASSWD_ERR;
 905         }
 906
 907         lutil_SHA1Init( &SHA1context );
 908         lutil_SHA1Update( &SHA1context,
 909                 (const unsigned char *)passwd->bv_val, passwd->bv_len );
 910         lutil_SHA1Update( &SHA1context,
 911                 (const unsigned char *)salt.bv_val, salt.bv_len );
 912         lutil_SHA1Final( SHA1digest, &SHA1context );
 913
 914         return pw_string64( scheme, &digest, hash, &salt);
 915 }
 916
 917 static int hash_sha1(
 918         const struct berval *scheme,
 919         const struct berval  *passwd,
 920         struct berval *hash,
 921         const char **text )
 922 {
 923         lutil_SHA1_CTX  SHA1context;
 924         unsigned char   SHA1digest[LUTIL_SHA1_BYTES];
 925         struct berval digest;
 926         digest.bv_val = (char *) SHA1digest;
 927         digest.bv_len = sizeof(SHA1digest);
 928
 929         lutil_SHA1Init( &SHA1context );
 930         lutil_SHA1Update( &SHA1context,
 931                 (const unsigned char *)passwd->bv_val, passwd->bv_len );
 932         lutil_SHA1Final( SHA1digest, &SHA1context );
 933
 934         return pw_string64( scheme, &digest, hash, NULL);
 935 }
 936 #endif
 937
 938 static int hash_smd5(
 939         const struct berval *scheme,
 940         const struct berval  *passwd,
 941         struct berval *hash,
 942         const char **text )
 943 {
 944         lutil_MD5_CTX   MD5context;
 945         unsigned char   MD5digest[LUTIL_MD5_BYTES];
 946         char            saltdata[SALT_SIZE];
 947         struct berval digest;
 948         struct berval salt;
 949
 950         digest.bv_val = (char *) MD5digest;
 951         digest.bv_len = sizeof(MD5digest);
 952         salt.bv_val = saltdata;
 953         salt.bv_len = sizeof(saltdata);
 954
 955         if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) {
 956                 return LUTIL_PASSWD_ERR;
 957         }
 958
 959         lutil_MD5Init( &MD5context );
 960         lutil_MD5Update( &MD5context,
 961                 (const unsigned char *) passwd->bv_val, passwd->bv_len );
 962         lutil_MD5Update( &MD5context,
 963                 (const unsigned char *) salt.bv_val, salt.bv_len );
 964         lutil_MD5Final( MD5digest, &MD5context );
 965
 966         return pw_string64( scheme, &digest, hash, &salt );
 967 }
 968
 969 static int hash_md5(
 970         const struct berval *scheme,
 971         const struct berval  *passwd,
 972         struct berval *hash,
 973         const char **text )
 974 {
 975         lutil_MD5_CTX   MD5context;
 976         unsigned char   MD5digest[LUTIL_MD5_BYTES];
 977
 978         struct berval digest;
 979
 980         digest.bv_val = (char *) MD5digest;
 981         digest.bv_len = sizeof(MD5digest);
 982
 983         lutil_MD5Init( &MD5context );
 984         lutil_MD5Update( &MD5context,
 985                 (const unsigned char *) passwd->bv_val, passwd->bv_len );
 986         lutil_MD5Final( MD5digest, &MD5context );
 987
 988         return pw_string64( scheme, &digest, hash, NULL );
 989 ;
 990 }
 991
 992 #ifdef SLAPD_LMHASH
 993 static int hash_lanman(
 994         const struct berval *scheme,
 995         const struct berval *passwd,
 996         struct berval *hash,
 997         const char **text )
 998 {
 999
1000         int i;
1001         char UcasePassword[15];
1002         des_cblock key;
1003         des_key_schedule schedule;
1004         des_cblock StdText = "KGS!@#$%";
1005         des_cblock PasswordHash1, PasswordHash2;
1006         char PasswordHash[33];
1007
1008         for( i=0; i<passwd->bv_len; i++) {
1009                 if(passwd->bv_val[i] == '\0') {
1010                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
1011                 }
1012         }
1013
1014         if( passwd->bv_val[i] != '\0' ) {
1015                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
1016         }
1017
1018         strncpy( UcasePassword, passwd->bv_val, 14 );
1019         UcasePassword[14] = '\0';
1020         ldap_pvt_str2upper( UcasePassword );
1021
1022         lmPasswd_to_key( UcasePassword, &key );
1023         des_set_key_unchecked( &key, schedule );
1024         des_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT );
1025
1026         lmPasswd_to_key( &UcasePassword[7], &key );
1027         des_set_key_unchecked( &key, schedule );
1028         des_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT );
1029
1030         sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
1031                 PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3],
1032                 PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7],
1033                 PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3],
1034                 PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] );
1035
1036         hash->bv_val = PasswordHash;
1037         hash->bv_len = 32;
1038
1039         return pw_string( scheme, hash );
1040 }
1041 #endif /* SLAPD_LMHASH */
1042
1043 #ifdef SLAPD_CRYPT
1044 static int hash_crypt(
1045         const struct berval *scheme,
1046         const struct berval *passwd,
1047         struct berval *hash,
1048         const char **text )
1049 {
1050         unsigned char salt[32]; /* salt suitable for most anything */
1051         unsigned int i;
1052         char *save;
1053         int rc;
1054
1055         for( i=0; i<passwd->bv_len; i++) {
1056                 if(passwd->bv_val[i] == '\0') {
1057                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
1058                 }
1059         }
1060
1061         if( passwd->bv_val[i] != '\0' ) {
1062                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
1063         }
1064
1065         if( lutil_entropy( salt, sizeof( salt ) ) < 0 ) {
1066                 return LUTIL_PASSWD_ERR;
1067         }
1068
1069         for( i=0; i< ( sizeof(salt) - 1 ); i++ ) {
1070                 salt[i] = crypt64[ salt[i] % (sizeof(crypt64)-1) ];
1071         }
1072         salt[sizeof( salt ) - 1 ] = '\0';
1073
1074         if( salt_format != NULL ) {
1075                 /* copy the salt we made into entropy before snprintfing
1076                    it back into the salt */
1077                 char entropy[sizeof(salt)];
1078                 strcpy( entropy, (char *) salt );
1079                 snprintf( (char *) salt, sizeof(entropy), salt_format, entropy );
1080         }
1081
1082         rc = lutil_cryptptr( passwd->bv_val, (char *) salt, &hash->bv_val );
1083         if ( rc != LUTIL_PASSWD_OK ) return rc;
1084
1085         if( hash->bv_val == NULL ) return -1;
1086
1087         hash->bv_len = strlen( hash->bv_val );
1088
1089         save = hash->bv_val;
1090
1091         if( hash->bv_len == 0 ) {
1092                 rc = LUTIL_PASSWD_ERR;
1093         } else {
1094                 rc = pw_string( scheme, hash );
1095         }
1096         ber_memfree( save );
1097         return rc;
1098 }
1099 #endif
1100
1101 int lutil_salt_format(const char *format)
1102 {
1103 #ifdef SLAPD_CRYPT
1104         free( salt_format );
1105
1106         salt_format = format != NULL ? ber_strdup( format ) : NULL;
1107 #endif
1108
1109         return 0;
1110 }
1111
1112 #ifdef SLAPD_CLEARTEXT
1113 static int hash_clear(
1114         const struct berval *scheme,
1115         const struct berval  *passwd,
1116         struct berval *hash,
1117         const char **text )
1118 {
1119         ber_dupbv( hash, (struct berval *)passwd );
1120         return LUTIL_PASSWD_OK;
1121 }
1122 #endif
1123