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 1998-2009 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 #if defined(HAVE_OPENSSL)
  38 #       include <openssl/des.h>
  39
  40
  41 typedef des_cblock des_key;
  42 typedef des_cblock des_data_block;
  43 typedef des_key_schedule des_context;
  44 #define des_failed(encrypted) 0
  45 #define des_finish(key, schedule)
  46
  47 #elif defined(HAVE_MOZNSS)
  48 #       include <pk11pub.h>
  49 typedef PK11SymKey *des_key;
  50 typedef unsigned char des_data_block[8];
  51 typedef PK11Context *des_context[1];
  52 #define DES_ENCRYPT CKA_ENCRYPT
  53
  54 #endif
  55
  56 #endif /* SLAPD_LMHASH */
  57
  58 #include <ac/param.h>
  59
  60 #ifdef SLAPD_CRYPT
  61 # include <ac/crypt.h>
  62
  63 # if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD )
  64 #  ifdef HAVE_SHADOW_H
  65 #       include <shadow.h>
  66 #  endif
  67 #  ifdef HAVE_PWD_H
  68 #       include <pwd.h>
  69 #  endif
  70 #  ifdef HAVE_AIX_SECURITY
  71 #       include <userpw.h>
  72 #  endif
  73 # endif
  74 #endif
  75
  76 #include <lber.h>
  77
  78 #include "ldap_pvt.h"
  79 #include "lber_pvt.h"
  80
  81 #include "lutil_md5.h"
  82 #include "lutil_sha1.h"
  83 #include "lutil.h"
  84
  85 static const unsigned char crypt64[] =
  86         "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890./";
  87
  88 #ifdef SLAPD_CRYPT
  89 static char *salt_format = NULL;
  90 static lutil_cryptfunc lutil_crypt;
  91 lutil_cryptfunc *lutil_cryptptr = lutil_crypt;
  92 #endif
  93
  94 /* KLUDGE:
  95  *  chk_fn is NULL iff name is {CLEARTEXT}
  96  *      otherwise, things will break
  97  */
  98 struct pw_scheme {
  99         struct berval name;
 100         LUTIL_PASSWD_CHK_FUNC *chk_fn;
 101         LUTIL_PASSWD_HASH_FUNC *hash_fn;
 102 };
 103
 104 struct pw_slist {
 105         struct pw_slist *next;
 106         struct pw_scheme s;
 107 };
 108
 109 /* password check routines */
 110
 111 #define SALT_SIZE       4
 112
 113 static LUTIL_PASSWD_CHK_FUNC chk_md5;
 114 static LUTIL_PASSWD_CHK_FUNC chk_smd5;
 115 static LUTIL_PASSWD_HASH_FUNC hash_smd5;
 116 static LUTIL_PASSWD_HASH_FUNC hash_md5;
 117
 118
 119 #ifdef LUTIL_SHA1_BYTES
 120 static LUTIL_PASSWD_CHK_FUNC chk_ssha1;
 121 static LUTIL_PASSWD_CHK_FUNC chk_sha1;
 122 static LUTIL_PASSWD_HASH_FUNC hash_sha1;
 123 static LUTIL_PASSWD_HASH_FUNC hash_ssha1;
 124 #endif
 125
 126 #ifdef SLAPD_LMHASH
 127 static LUTIL_PASSWD_CHK_FUNC chk_lanman;
 128 static LUTIL_PASSWD_HASH_FUNC hash_lanman;
 129 #endif
 130
 131 #ifdef SLAPD_CRYPT
 132 static LUTIL_PASSWD_CHK_FUNC chk_crypt;
 133 static LUTIL_PASSWD_HASH_FUNC hash_crypt;
 134
 135 #if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD )
 136 static LUTIL_PASSWD_CHK_FUNC chk_unix;
 137 #endif
 138 #endif
 139
 140 /* password hash routines */
 141
 142 #ifdef SLAPD_CLEARTEXT
 143 static LUTIL_PASSWD_HASH_FUNC hash_clear;
 144 #endif
 145
 146 static struct pw_slist *pw_schemes;
 147 static int pw_inited;
 148
 149 static const struct pw_scheme pw_schemes_default[] =
 150 {
 151 #ifdef LUTIL_SHA1_BYTES
 152         { BER_BVC("{SSHA}"),            chk_ssha1, hash_ssha1 },
 153         { BER_BVC("{SHA}"),                     chk_sha1, hash_sha1 },
 154 #endif
 155
 156         { BER_BVC("{SMD5}"),            chk_smd5, hash_smd5 },
 157         { BER_BVC("{MD5}"),                     chk_md5, hash_md5 },
 158
 159 #ifdef SLAPD_LMHASH
 160         { BER_BVC("{LANMAN}"),          chk_lanman, hash_lanman },
 161 #endif /* SLAPD_LMHASH */
 162
 163 #ifdef SLAPD_CRYPT
 164         { BER_BVC("{CRYPT}"),           chk_crypt, hash_crypt },
 165 # if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD )
 166         { BER_BVC("{UNIX}"),            chk_unix, NULL },
 167 # endif
 168 #endif
 169
 170 #ifdef SLAPD_CLEARTEXT
 171         /* pseudo scheme */
 172         { BER_BVC("{CLEARTEXT}"),       NULL, hash_clear },
 173 #endif
 174
 175         { BER_BVNULL, NULL, NULL }
 176 };
 177
 178 int lutil_passwd_add(
 179         struct berval *scheme,
 180         LUTIL_PASSWD_CHK_FUNC *chk,
 181         LUTIL_PASSWD_HASH_FUNC *hash )
 182 {
 183         struct pw_slist *ptr;
 184
 185         if (!pw_inited) lutil_passwd_init();
 186
 187         ptr = ber_memalloc( sizeof( struct pw_slist ));
 188         if (!ptr) return -1;
 189         ptr->next = pw_schemes;
 190         ptr->s.name = *scheme;
 191         ptr->s.chk_fn = chk;
 192         ptr->s.hash_fn = hash;
 193         pw_schemes = ptr;
 194         return 0;
 195 }
 196
 197 void lutil_passwd_init()
 198 {
 199         struct pw_scheme *s;
 200
 201         pw_inited = 1;
 202
 203         for( s=(struct pw_scheme *)pw_schemes_default; s->name.bv_val; s++) {
 204                 if ( lutil_passwd_add( &s->name, s->chk_fn, s->hash_fn ) ) break;
 205         }
 206 }
 207
 208 void lutil_passwd_destroy()
 209 {
 210         struct pw_slist *ptr, *next;
 211
 212         for( ptr=pw_schemes; ptr; ptr=next ) {
 213                 next = ptr->next;
 214                 ber_memfree( ptr );
 215         }
 216 }
 217
 218 static const struct pw_scheme *get_scheme(
 219         const char* scheme )
 220 {
 221         struct pw_slist *pws;
 222         struct berval bv;
 223
 224         if (!pw_inited) lutil_passwd_init();
 225
 226         bv.bv_val = strchr( scheme, '}' );
 227         if ( !bv.bv_val )
 228                 return NULL;
 229
 230         bv.bv_len = bv.bv_val - scheme + 1;
 231         bv.bv_val = (char *) scheme;
 232
 233         for( pws=pw_schemes; pws; pws=pws->next ) {
 234                 if ( ber_bvstrcasecmp(&bv, &pws->s.name ) == 0 ) {
 235                         return &(pws->s);
 236                 }
 237         }
 238
 239         return NULL;
 240 }
 241
 242 int lutil_passwd_scheme(
 243         const char* scheme )
 244 {
 245         if( scheme == NULL ) {
 246                 return 0;
 247         }
 248
 249         return get_scheme(scheme) != NULL;
 250 }
 251
 252
 253 static int is_allowed_scheme(
 254         const char* scheme,
 255         const char** schemes )
 256 {
 257         int i;
 258
 259         if( schemes == NULL ) return 1;
 260
 261         for( i=0; schemes[i] != NULL; i++ ) {
 262                 if( strcasecmp( scheme, schemes[i] ) == 0 ) {
 263                         return 1;
 264                 }
 265         }
 266         return 0;
 267 }
 268
 269 static struct berval *passwd_scheme(
 270         const struct pw_scheme *scheme,
 271         const struct berval * passwd,
 272         struct berval *bv,
 273         const char** allowed )
 274 {
 275         if( !is_allowed_scheme( scheme->name.bv_val, allowed ) ) {
 276                 return NULL;
 277         }
 278
 279         if( passwd->bv_len >= scheme->name.bv_len ) {
 280                 if( strncasecmp( passwd->bv_val, scheme->name.bv_val, scheme->name.bv_len ) == 0 ) {
 281                         bv->bv_val = &passwd->bv_val[scheme->name.bv_len];
 282                         bv->bv_len = passwd->bv_len - scheme->name.bv_len;
 283
 284                         return bv;
 285                 }
 286         }
 287
 288         return NULL;
 289 }
 290
 291 /*
 292  * Return 0 if creds are good.
 293  */
 294 int
 295 lutil_passwd(
 296         const struct berval *passwd,    /* stored passwd */
 297         const struct berval *cred,              /* user cred */
 298         const char **schemes,
 299         const char **text )
 300 {
 301         struct pw_slist *pws;
 302
 303         if ( text ) *text = NULL;
 304
 305         if (cred == NULL || cred->bv_len == 0 ||
 306                 passwd == NULL || passwd->bv_len == 0 )
 307         {
 308                 return -1;
 309         }
 310
 311         if (!pw_inited) lutil_passwd_init();
 312
 313         for( pws=pw_schemes; pws; pws=pws->next ) {
 314                 if( pws->s.chk_fn ) {
 315                         struct berval x;
 316                         struct berval *p = passwd_scheme( &(pws->s),
 317                                 passwd, &x, schemes );
 318
 319                         if( p != NULL ) {
 320                                 return (pws->s.chk_fn)( &(pws->s.name), p, cred, text );
 321                         }
 322                 }
 323         }
 324
 325 #ifdef SLAPD_CLEARTEXT
 326         /* Do we think there is a scheme specifier here that we
 327          * didn't recognize? Assume a scheme name is at least 1 character.
 328          */
 329         if (( passwd->bv_val[0] == '{' ) &&
 330                 ( ber_bvchr( passwd, '}' ) > passwd->bv_val+1 ))
 331         {
 332                 return 1;
 333         }
 334         if( is_allowed_scheme("{CLEARTEXT}", schemes ) ) {
 335                 return ( passwd->bv_len == cred->bv_len ) ?
 336                         memcmp( passwd->bv_val, cred->bv_val, passwd->bv_len )
 337                         : 1;
 338         }
 339 #endif
 340         return 1;
 341 }
 342
 343 int lutil_passwd_generate( struct berval *pw, ber_len_t len )
 344 {
 345
 346         if( len < 1 ) return -1;
 347
 348         pw->bv_len = len;
 349         pw->bv_val = ber_memalloc( len + 1 );
 350
 351         if( pw->bv_val == NULL ) {
 352                 return -1;
 353         }
 354
 355         if( lutil_entropy( (unsigned char *) pw->bv_val, pw->bv_len) < 0 ) {
 356                 return -1;
 357         }
 358
 359         for( len = 0; len < pw->bv_len; len++ ) {
 360                 pw->bv_val[len] = crypt64[
 361                         pw->bv_val[len] % (sizeof(crypt64)-1) ];
 362         }
 363
 364         pw->bv_val[len] = '\0';
 365
 366         return 0;
 367 }
 368
 369 int lutil_passwd_hash(
 370         const struct berval * passwd,
 371         const char * method,
 372         struct berval *hash,
 373         const char **text )
 374 {
 375         const struct pw_scheme *sc = get_scheme( method );
 376
 377         hash->bv_val = NULL;
 378         hash->bv_len = 0;
 379
 380         if( sc == NULL ) {
 381                 if( text ) *text = "scheme not recognized";
 382                 return -1;
 383         }
 384
 385         if( ! sc->hash_fn ) {
 386                 if( text ) *text = "scheme provided no hash function";
 387                 return -1;
 388         }
 389
 390         if( text ) *text = NULL;
 391
 392         return (sc->hash_fn)( &sc->name, passwd, hash, 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 int pw_string(
 398         const struct berval *sc,
 399         struct berval *passwd )
 400 {
 401         struct berval pw;
 402
 403         pw.bv_len = sc->bv_len + passwd->bv_len;
 404         pw.bv_val = ber_memalloc( pw.bv_len + 1 );
 405
 406         if( pw.bv_val == NULL ) {
 407                 return LUTIL_PASSWD_ERR;
 408         }
 409
 410         AC_MEMCPY( pw.bv_val, sc->bv_val, sc->bv_len );
 411         AC_MEMCPY( &pw.bv_val[sc->bv_len], passwd->bv_val, passwd->bv_len );
 412
 413         pw.bv_val[pw.bv_len] = '\0';
 414         *passwd = pw;
 415
 416         return LUTIL_PASSWD_OK;
 417 }
 418 #endif /* SLAPD_LMHASH || SLAPD_CRYPT */
 419
 420 static int pw_string64(
 421         const struct berval *sc,
 422         const struct berval *hash,
 423         struct berval *b64,
 424         const struct berval *salt )
 425 {
 426         int rc;
 427         struct berval string;
 428         size_t b64len;
 429
 430         if( salt ) {
 431                 /* need to base64 combined string */
 432                 string.bv_len = hash->bv_len + salt->bv_len;
 433                 string.bv_val = ber_memalloc( string.bv_len + 1 );
 434
 435                 if( string.bv_val == NULL ) {
 436                         return LUTIL_PASSWD_ERR;
 437                 }
 438
 439                 AC_MEMCPY( string.bv_val, hash->bv_val,
 440                         hash->bv_len );
 441                 AC_MEMCPY( &string.bv_val[hash->bv_len], salt->bv_val,
 442                         salt->bv_len );
 443                 string.bv_val[string.bv_len] = '\0';
 444
 445         } else {
 446                 string = *hash;
 447         }
 448
 449         b64len = LUTIL_BASE64_ENCODE_LEN( string.bv_len ) + 1;
 450         b64->bv_len = b64len + sc->bv_len;
 451         b64->bv_val = ber_memalloc( b64->bv_len + 1 );
 452
 453         if( b64->bv_val == NULL ) {
 454                 if( salt ) ber_memfree( string.bv_val );
 455                 return LUTIL_PASSWD_ERR;
 456         }
 457
 458         AC_MEMCPY(b64->bv_val, sc->bv_val, sc->bv_len);
 459
 460         rc = lutil_b64_ntop(
 461                 (unsigned char *) string.bv_val, string.bv_len,
 462                 &b64->bv_val[sc->bv_len], b64len );
 463
 464         if( salt ) ber_memfree( string.bv_val );
 465
 466         if( rc < 0 ) {
 467                 return LUTIL_PASSWD_ERR;
 468         }
 469
 470         /* recompute length */
 471         b64->bv_len = sc->bv_len + rc;
 472         assert( strlen(b64->bv_val) == b64->bv_len );
 473         return LUTIL_PASSWD_OK;
 474 }
 475
 476 /* PASSWORD CHECK ROUTINES */
 477
 478 #ifdef LUTIL_SHA1_BYTES
 479 static int chk_ssha1(
 480         const struct berval *sc,
 481         const struct berval * passwd,
 482         const struct berval * cred,
 483         const char **text )
 484 {
 485         lutil_SHA1_CTX SHA1context;
 486         unsigned char SHA1digest[LUTIL_SHA1_BYTES];
 487         int rc;
 488         unsigned char *orig_pass = NULL;
 489
 490         /* safety check -- must have some salt */
 491         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <= sizeof(SHA1digest)) {
 492                 return LUTIL_PASSWD_ERR;
 493         }
 494
 495         /* decode base64 password */
 496         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 497                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 498
 499         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 500
 501         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 502
 503         /* safety check -- must have some salt */
 504         if (rc <= (int)(sizeof(SHA1digest))) {
 505                 ber_memfree(orig_pass);
 506                 return LUTIL_PASSWD_ERR;
 507         }
 508
 509         /* hash credentials with salt */
 510         lutil_SHA1Init(&SHA1context);
 511         lutil_SHA1Update(&SHA1context,
 512                 (const unsigned char *) cred->bv_val, cred->bv_len);
 513         lutil_SHA1Update(&SHA1context,
 514                 (const unsigned char *) &orig_pass[sizeof(SHA1digest)],
 515                 rc - sizeof(SHA1digest));
 516         lutil_SHA1Final(SHA1digest, &SHA1context);
 517
 518         /* compare */
 519         rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
 520         ber_memfree(orig_pass);
 521         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 522 }
 523
 524 static int chk_sha1(
 525         const struct berval *sc,
 526         const struct berval * passwd,
 527         const struct berval * cred,
 528         const char **text )
 529 {
 530         lutil_SHA1_CTX SHA1context;
 531         unsigned char SHA1digest[LUTIL_SHA1_BYTES];
 532         int rc;
 533         unsigned char *orig_pass = NULL;
 534
 535         /* safety check */
 536         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) < sizeof(SHA1digest)) {
 537                 return LUTIL_PASSWD_ERR;
 538         }
 539
 540         /* base64 un-encode password */
 541         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 542                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 543
 544         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 545
 546         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 547
 548         if( rc != sizeof(SHA1digest) ) {
 549                 ber_memfree(orig_pass);
 550                 return LUTIL_PASSWD_ERR;
 551         }
 552
 553         /* hash credentials with salt */
 554         lutil_SHA1Init(&SHA1context);
 555         lutil_SHA1Update(&SHA1context,
 556                 (const unsigned char *) cred->bv_val, cred->bv_len);
 557         lutil_SHA1Final(SHA1digest, &SHA1context);
 558
 559         /* compare */
 560         rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
 561         ber_memfree(orig_pass);
 562         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 563 }
 564 #endif
 565
 566 static int chk_smd5(
 567         const struct berval *sc,
 568         const struct berval * passwd,
 569         const struct berval * cred,
 570         const char **text )
 571 {
 572         lutil_MD5_CTX MD5context;
 573         unsigned char MD5digest[LUTIL_MD5_BYTES];
 574         int rc;
 575         unsigned char *orig_pass = NULL;
 576
 577         /* safety check */
 578         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <= sizeof(MD5digest)) {
 579                 return LUTIL_PASSWD_ERR;
 580         }
 581
 582         /* base64 un-encode password */
 583         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 584                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 585
 586         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 587
 588         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 589
 590         if (rc <= (int)(sizeof(MD5digest))) {
 591                 ber_memfree(orig_pass);
 592                 return LUTIL_PASSWD_ERR;
 593         }
 594
 595         /* hash credentials with salt */
 596         lutil_MD5Init(&MD5context);
 597         lutil_MD5Update(&MD5context,
 598                 (const unsigned char *) cred->bv_val,
 599                 cred->bv_len );
 600         lutil_MD5Update(&MD5context,
 601                 &orig_pass[sizeof(MD5digest)],
 602                 rc - sizeof(MD5digest));
 603         lutil_MD5Final(MD5digest, &MD5context);
 604
 605         /* compare */
 606         rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
 607         ber_memfree(orig_pass);
 608         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 609 }
 610
 611 static int chk_md5(
 612         const struct berval *sc,
 613         const struct berval * passwd,
 614         const struct berval * cred,
 615         const char **text )
 616 {
 617         lutil_MD5_CTX MD5context;
 618         unsigned char MD5digest[LUTIL_MD5_BYTES];
 619         int rc;
 620         unsigned char *orig_pass = NULL;
 621
 622         /* safety check */
 623         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) < sizeof(MD5digest)) {
 624                 return LUTIL_PASSWD_ERR;
 625         }
 626
 627         /* base64 un-encode password */
 628         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 629                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 630
 631         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 632
 633         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 634         if ( rc != sizeof(MD5digest) ) {
 635                 ber_memfree(orig_pass);
 636                 return LUTIL_PASSWD_ERR;
 637         }
 638
 639         /* hash credentials with salt */
 640         lutil_MD5Init(&MD5context);
 641         lutil_MD5Update(&MD5context,
 642                 (const unsigned char *) cred->bv_val,
 643                 cred->bv_len );
 644         lutil_MD5Final(MD5digest, &MD5context);
 645
 646         /* compare */
 647         rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
 648         ber_memfree(orig_pass);
 649         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 650 }
 651
 652 #ifdef SLAPD_LMHASH
 653
 654 #if defined(HAVE_OPENSSL)
 655
 656 /*
 657  * abstract away setting the parity.
 658  */
 659 static void
 660 des_set_key( des_key *key, unsigned char *keyData)
 661 {
 662     memcpy(key, keyData, 8);
 663     des_set_odd_parity( key );
 664 }
 665
 666
 667 #elif defined(HAVE_MOZNSS)
 668
 669 /*
 670  * implement MozNSS wrappers for the openSSL calls
 671  */
 672 static void
 673 des_set_key( des_key *key, unsigned char *keyData)
 674 {
 675     SECItem keyDataItem;
 676     PK11SlotInfo *slot;
 677     *key = NULL;
 678
 679     keyDataItem.data = keyData;
 680     keyDataItem.len = 8;
 681
 682     slot = PK11_GetBestSlot(CKM_DES_ECB, NULL);
 683     if (slot == NULL) {
 684         return;
 685     }
 686
 687     /* NOTE: this will not work in FIPS mode. In order to make lmhash
 688      * work in fips mode we need to define a LMHASH pbe mechanism and
 689      * do the fulll key derivation inside the token */
 690     *key = PK11_ImportSymKey(slot, CKM_DES_ECB, PK11_OriginGenerated,
 691                 CKA_ENCRYPT, &keyDataItem, NULL);
 692 }
 693
 694 static void
 695 des_set_key_unchecked( des_key *key, des_context ctxt )
 696 {
 697     ctxt[0] = NULL;
 698
 699     /* handle error conditions from previous call */
 700     if (!*key) {
 701         return;
 702     }
 703
 704     ctxt[0] = PK11_CreateContextBySymKey(CKM_DES_ECB, CKA_ENCRYPT, *key, NULL);
 705 }
 706
 707 static void
 708 des_ecb_encrypt( des_data_block *plain, des_data_block *encrypted,
 709                         des_context ctxt, int op)
 710 {
 711     SECStatus rv;
 712     int size;
 713
 714     if (ctxt[0] == NULL) {
 715         /* need to fail here...  */
 716         memset(encrypted, 0, sizeof(des_data_block));
 717         return;
 718     }
 719     rv = PK11_CipherOp(ctxt[0], (unsigned char *)&encrypted[0],
 720                         &size, sizeof(des_data_block),
 721                         (unsigned char *)&plain[0], sizeof(des_data_block));
 722     if (rv != SECSuccess) {
 723         /* signal failure */
 724         memset(encrypted, 0, sizeof(des_data_block));
 725         return;
 726     }
 727     return;
 728 }
 729
 730 static int
 731 des_failed(des_data_block *encrypted)
 732 {
 733    static const des_data_block zero = { 0 };
 734    return memcmp(encrypted, zero, sizeof(zero)) == 0;
 735 }
 736
 737 static void
 738 des_finish(des_key *key, des_context ctxt)
 739 {
 740      if (*key) {
 741         PK11_FreeSymKey(*key);
 742         *key = NULL;
 743      }
 744      if (ctxt[0]) {
 745         PK11_Finalize(ctxt[0]);
 746         PK11_DestroyContext(ctxt[0], PR_TRUE);
 747         ctxt[0] = NULL;
 748      }
 749 }
 750
 751 #endif
 752
 753 /* pseudocode from RFC2433
 754  * A.2 LmPasswordHash()
 755  *
 756  *    LmPasswordHash(
 757  *    IN  0-to-14-oem-char Password,
 758  *    OUT 16-octet         PasswordHash )
 759  *    {
 760  *       Set UcasePassword to the uppercased Password
 761  *       Zero pad UcasePassword to 14 characters
 762  *
 763  *       DesHash( 1st 7-octets of UcasePassword,
 764  *                giving 1st 8-octets of PasswordHash )
 765  *
 766  *       DesHash( 2nd 7-octets of UcasePassword,
 767  *                giving 2nd 8-octets of PasswordHash )
 768  *    }
 769  *
 770  *
 771  * A.3 DesHash()
 772  *
 773  *    DesHash(
 774  *    IN  7-octet Clear,
 775  *    OUT 8-octet Cypher )
 776  *    {
 777  *        *
 778  *        * Make Cypher an irreversibly encrypted form of Clear by
 779  *        * encrypting known text using Clear as the secret key.
 780  *        * The known text consists of the string
 781  *        *
 782  *        *              KGS!@#$%
 783  *        *
 784  *
 785  *       Set StdText to "KGS!@#$%"
 786  *       DesEncrypt( StdText, Clear, giving Cypher )
 787  *    }
 788  *
 789  *
 790  * A.4 DesEncrypt()
 791  *
 792  *    DesEncrypt(
 793  *    IN  8-octet Clear,
 794  *    IN  7-octet Key,
 795  *    OUT 8-octet Cypher )
 796  *    {
 797  *        *
 798  *        * Use the DES encryption algorithm [4] in ECB mode [9]
 799  *        * to encrypt Clear into Cypher such that Cypher can
 800  *        * only be decrypted back to Clear by providing Key.
 801  *        * Note that the DES algorithm takes as input a 64-bit
 802  *        * stream where the 8th, 16th, 24th, etc.  bits are
 803  *        * parity bits ignored by the encrypting algorithm.
 804  *        * Unless you write your own DES to accept 56-bit input
 805  *        * without parity, you will need to insert the parity bits
 806  *        * yourself.
 807  *        *
 808  *    }
 809  */
 810
 811 static void lmPasswd_to_key(
 812         const char *lmPasswd,
 813         des_key *key)
 814 {
 815         const unsigned char *lpw = (const unsigned char *) lmPasswd;
 816         unsigned char k[8];
 817
 818         /* make room for parity bits */
 819         k[0] = lpw[0];
 820         k[1] = ((lpw[0] & 0x01) << 7) | (lpw[1] >> 1);
 821         k[2] = ((lpw[1] & 0x03) << 6) | (lpw[2] >> 2);
 822         k[3] = ((lpw[2] & 0x07) << 5) | (lpw[3] >> 3);
 823         k[4] = ((lpw[3] & 0x0F) << 4) | (lpw[4] >> 4);
 824         k[5] = ((lpw[4] & 0x1F) << 3) | (lpw[5] >> 5);
 825         k[6] = ((lpw[5] & 0x3F) << 2) | (lpw[6] >> 6);
 826         k[7] = ((lpw[6] & 0x7F) << 1);
 827
 828         des_set_key( key, k );
 829 }
 830
 831 static int chk_lanman(
 832         const struct berval *scheme,
 833         const struct berval *passwd,
 834         const struct berval *cred,
 835         const char **text )
 836 {
 837         ber_len_t i;
 838         char UcasePassword[15];
 839         des_key key;
 840         des_context schedule;
 841         des_data_block StdText = "KGS!@#$%";
 842         des_data_block PasswordHash1, PasswordHash2;
 843         char PasswordHash[33], storedPasswordHash[33];
 844
 845         for( i=0; i<cred->bv_len; i++) {
 846                 if(cred->bv_val[i] == '\0') {
 847                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 848                 }
 849         }
 850
 851         if( cred->bv_val[i] != '\0' ) {
 852                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 853         }
 854
 855         strncpy( UcasePassword, cred->bv_val, 14 );
 856         UcasePassword[14] = '\0';
 857         ldap_pvt_str2upper( UcasePassword );
 858
 859         lmPasswd_to_key( UcasePassword, &key );
 860         des_set_key_unchecked( &key, schedule );
 861         des_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT );
 862
 863         if (des_failed(&PasswordHash1)) {
 864             return LUTIL_PASSWD_ERR;
 865         }
 866
 867         lmPasswd_to_key( &UcasePassword[7], &key );
 868         des_set_key_unchecked( &key, schedule );
 869         des_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT );
 870         if (des_failed(&PasswordHash2)) {
 871             return LUTIL_PASSWD_ERR;
 872         }
 873
 874         des_finish( &key, schedule );
 875
 876         sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 877                 PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3],
 878                 PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7],
 879                 PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3],
 880                 PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] );
 881
 882         /* as a precaution convert stored password hash to lower case */
 883         strncpy( storedPasswordHash, passwd->bv_val, 32 );
 884         storedPasswordHash[32] = '\0';
 885         ldap_pvt_str2lower( storedPasswordHash );
 886
 887         return memcmp( PasswordHash, storedPasswordHash, 32) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 888 }
 889 #endif /* SLAPD_LMHASH */
 890
 891 #ifdef SLAPD_CRYPT
 892 static int lutil_crypt(
 893         const char *key,
 894         const char *salt,
 895         char **hash )
 896 {
 897         char *cr = crypt( key, salt );
 898         int rc;
 899
 900         if( cr == NULL || cr[0] == '\0' ) {
 901                 /* salt must have been invalid */
 902                 rc = LUTIL_PASSWD_ERR;
 903         } else {
 904                 if ( hash ) {
 905                         *hash = ber_strdup( cr );
 906                         rc = LUTIL_PASSWD_OK;
 907                 } else {
 908                         rc = strcmp( salt, cr ) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 909                 }
 910         }
 911         return rc;
 912 }
 913
 914 static int chk_crypt(
 915         const struct berval *sc,
 916         const struct berval * passwd,
 917         const struct berval * cred,
 918         const char **text )
 919 {
 920         unsigned int i;
 921
 922         for( i=0; i<cred->bv_len; i++) {
 923                 if(cred->bv_val[i] == '\0') {
 924                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 925                 }
 926         }
 927
 928         if( cred->bv_val[i] != '\0' ) {
 929                 return LUTIL_PASSWD_ERR;        /* cred must behave like a string */
 930         }
 931
 932         if( passwd->bv_len < 2 ) {
 933                 return LUTIL_PASSWD_ERR;        /* passwd must be at least two characters long */
 934         }
 935
 936         for( i=0; i<passwd->bv_len; i++) {
 937                 if(passwd->bv_val[i] == '\0') {
 938                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 939                 }
 940         }
 941
 942         if( passwd->bv_val[i] != '\0' ) {
 943                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 944         }
 945
 946         return lutil_cryptptr( cred->bv_val, passwd->bv_val, NULL );
 947 }
 948
 949 # if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD )
 950 static int chk_unix(
 951         const struct berval *sc,
 952         const struct berval * passwd,
 953         const struct berval * cred,
 954         const char **text )
 955 {
 956         unsigned int i;
 957         char *pw;
 958
 959         for( i=0; i<cred->bv_len; i++) {
 960                 if(cred->bv_val[i] == '\0') {
 961                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 962                 }
 963         }
 964         if( cred->bv_val[i] != '\0' ) {
 965                 return LUTIL_PASSWD_ERR;        /* cred must behave like a string */
 966         }
 967
 968         for( i=0; i<passwd->bv_len; i++) {
 969                 if(passwd->bv_val[i] == '\0') {
 970                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 971                 }
 972         }
 973
 974         if( passwd->bv_val[i] != '\0' ) {
 975                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 976         }
 977
 978         {
 979                 struct passwd *pwd = getpwnam(passwd->bv_val);
 980
 981                 if(pwd == NULL) {
 982                         return LUTIL_PASSWD_ERR;        /* not found */
 983                 }
 984
 985                 pw = pwd->pw_passwd;
 986         }
 987 #  ifdef HAVE_GETSPNAM
 988         {
 989                 struct spwd *spwd = getspnam(passwd->bv_val);
 990
 991                 if(spwd != NULL) {
 992                         pw = spwd->sp_pwdp;
 993                 }
 994         }
 995 #  endif
 996 #  ifdef HAVE_AIX_SECURITY
 997         {
 998                 struct userpw *upw = getuserpw(passwd->bv_val);
 999
1000                 if (upw != NULL) {
1001                         pw = upw->upw_passwd;
1002                 }
1003         }
1004 #  endif
1005
1006         if( pw == NULL || pw[0] == '\0' || pw[1] == '\0' ) {
1007                 /* password must must be at least two characters long */
1008                 return LUTIL_PASSWD_ERR;
1009         }
1010
1011         return lutil_cryptptr( cred->bv_val, pw, NULL );
1012 }
1013 # endif
1014 #endif
1015
1016 /* PASSWORD GENERATION ROUTINES */
1017
1018 #ifdef LUTIL_SHA1_BYTES
1019 static int hash_ssha1(
1020         const struct berval *scheme,
1021         const struct berval  *passwd,
1022         struct berval *hash,
1023         const char **text )
1024 {
1025         lutil_SHA1_CTX  SHA1context;
1026         unsigned char   SHA1digest[LUTIL_SHA1_BYTES];
1027         char            saltdata[SALT_SIZE];
1028         struct berval digest;
1029         struct berval salt;
1030
1031         digest.bv_val = (char *) SHA1digest;
1032         digest.bv_len = sizeof(SHA1digest);
1033         salt.bv_val = saltdata;
1034         salt.bv_len = sizeof(saltdata);
1035
1036         if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) {
1037                 return LUTIL_PASSWD_ERR;
1038         }
1039
1040         lutil_SHA1Init( &SHA1context );
1041         lutil_SHA1Update( &SHA1context,
1042                 (const unsigned char *)passwd->bv_val, passwd->bv_len );
1043         lutil_SHA1Update( &SHA1context,
1044                 (const unsigned char *)salt.bv_val, salt.bv_len );
1045         lutil_SHA1Final( SHA1digest, &SHA1context );
1046
1047         return pw_string64( scheme, &digest, hash, &salt);
1048 }
1049
1050 static int hash_sha1(
1051         const struct berval *scheme,
1052         const struct berval  *passwd,
1053         struct berval *hash,
1054         const char **text )
1055 {
1056         lutil_SHA1_CTX  SHA1context;
1057         unsigned char   SHA1digest[LUTIL_SHA1_BYTES];
1058         struct berval digest;
1059         digest.bv_val = (char *) SHA1digest;
1060         digest.bv_len = sizeof(SHA1digest);
1061
1062         lutil_SHA1Init( &SHA1context );
1063         lutil_SHA1Update( &SHA1context,
1064                 (const unsigned char *)passwd->bv_val, passwd->bv_len );
1065         lutil_SHA1Final( SHA1digest, &SHA1context );
1066
1067         return pw_string64( scheme, &digest, hash, NULL);
1068 }
1069 #endif
1070
1071 static int hash_smd5(
1072         const struct berval *scheme,
1073         const struct berval  *passwd,
1074         struct berval *hash,
1075         const char **text )
1076 {
1077         lutil_MD5_CTX   MD5context;
1078         unsigned char   MD5digest[LUTIL_MD5_BYTES];
1079         char            saltdata[SALT_SIZE];
1080         struct berval digest;
1081         struct berval salt;
1082
1083         digest.bv_val = (char *) MD5digest;
1084         digest.bv_len = sizeof(MD5digest);
1085         salt.bv_val = saltdata;
1086         salt.bv_len = sizeof(saltdata);
1087
1088         if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) {
1089                 return LUTIL_PASSWD_ERR;
1090         }
1091
1092         lutil_MD5Init( &MD5context );
1093         lutil_MD5Update( &MD5context,
1094                 (const unsigned char *) passwd->bv_val, passwd->bv_len );
1095         lutil_MD5Update( &MD5context,
1096                 (const unsigned char *) salt.bv_val, salt.bv_len );
1097         lutil_MD5Final( MD5digest, &MD5context );
1098
1099         return pw_string64( scheme, &digest, hash, &salt );
1100 }
1101
1102 static int hash_md5(
1103         const struct berval *scheme,
1104         const struct berval  *passwd,
1105         struct berval *hash,
1106         const char **text )
1107 {
1108         lutil_MD5_CTX   MD5context;
1109         unsigned char   MD5digest[LUTIL_MD5_BYTES];
1110
1111         struct berval digest;
1112
1113         digest.bv_val = (char *) MD5digest;
1114         digest.bv_len = sizeof(MD5digest);
1115
1116         lutil_MD5Init( &MD5context );
1117         lutil_MD5Update( &MD5context,
1118                 (const unsigned char *) passwd->bv_val, passwd->bv_len );
1119         lutil_MD5Final( MD5digest, &MD5context );
1120
1121         return pw_string64( scheme, &digest, hash, NULL );
1122 ;
1123 }
1124
1125 #ifdef SLAPD_LMHASH
1126 static int hash_lanman(
1127         const struct berval *scheme,
1128         const struct berval *passwd,
1129         struct berval *hash,
1130         const char **text )
1131 {
1132
1133         ber_len_t i;
1134         char UcasePassword[15];
1135         des_key key;
1136         des_context schedule;
1137         des_data_block StdText = "KGS!@#$%";
1138         des_data_block PasswordHash1, PasswordHash2;
1139         char PasswordHash[33];
1140
1141         for( i=0; i<passwd->bv_len; i++) {
1142                 if(passwd->bv_val[i] == '\0') {
1143                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
1144                 }
1145         }
1146
1147         if( passwd->bv_val[i] != '\0' ) {
1148                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
1149         }
1150
1151         strncpy( UcasePassword, passwd->bv_val, 14 );
1152         UcasePassword[14] = '\0';
1153         ldap_pvt_str2upper( UcasePassword );
1154
1155         lmPasswd_to_key( UcasePassword, &key );
1156         des_set_key_unchecked( &key, schedule );
1157         des_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT );
1158
1159         lmPasswd_to_key( &UcasePassword[7], &key );
1160         des_set_key_unchecked( &key, schedule );
1161         des_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT );
1162
1163         sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
1164                 PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3],
1165                 PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7],
1166                 PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3],
1167                 PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] );
1168
1169         hash->bv_val = PasswordHash;
1170         hash->bv_len = 32;
1171
1172         return pw_string( scheme, hash );
1173 }
1174 #endif /* SLAPD_LMHASH */
1175
1176 #ifdef SLAPD_CRYPT
1177 static int hash_crypt(
1178         const struct berval *scheme,
1179         const struct berval *passwd,
1180         struct berval *hash,
1181         const char **text )
1182 {
1183         unsigned char salt[32]; /* salt suitable for most anything */
1184         unsigned int i;
1185         char *save;
1186         int rc;
1187
1188         for( i=0; i<passwd->bv_len; i++) {
1189                 if(passwd->bv_val[i] == '\0') {
1190                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
1191                 }
1192         }
1193
1194         if( passwd->bv_val[i] != '\0' ) {
1195                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
1196         }
1197
1198         if( lutil_entropy( salt, sizeof( salt ) ) < 0 ) {
1199                 return LUTIL_PASSWD_ERR;
1200         }
1201
1202         for( i=0; i< ( sizeof(salt) - 1 ); i++ ) {
1203                 salt[i] = crypt64[ salt[i] % (sizeof(crypt64)-1) ];
1204         }
1205         salt[sizeof( salt ) - 1 ] = '\0';
1206
1207         if( salt_format != NULL ) {
1208                 /* copy the salt we made into entropy before snprintfing
1209                    it back into the salt */
1210                 char entropy[sizeof(salt)];
1211                 strcpy( entropy, (char *) salt );
1212                 snprintf( (char *) salt, sizeof(entropy), salt_format, entropy );
1213         }
1214
1215         rc = lutil_cryptptr( passwd->bv_val, (char *) salt, &hash->bv_val );
1216         if ( rc != LUTIL_PASSWD_OK ) return rc;
1217
1218         if( hash->bv_val == NULL ) return -1;
1219
1220         hash->bv_len = strlen( hash->bv_val );
1221
1222         save = hash->bv_val;
1223
1224         if( hash->bv_len == 0 ) {
1225                 rc = LUTIL_PASSWD_ERR;
1226         } else {
1227                 rc = pw_string( scheme, hash );
1228         }
1229         ber_memfree( save );
1230         return rc;
1231 }
1232 #endif
1233
1234 int lutil_salt_format(const char *format)
1235 {
1236 #ifdef SLAPD_CRYPT
1237         ber_memfree( salt_format );
1238
1239         salt_format = format != NULL ? ber_strdup( format ) : NULL;
1240 #endif
1241
1242         return 0;
1243 }
1244
1245 #ifdef SLAPD_CLEARTEXT
1246 static int hash_clear(
1247         const struct berval *scheme,
1248         const struct berval  *passwd,
1249         struct berval *hash,
1250         const char **text )
1251 {
1252         ber_dupbv( hash, (struct berval *)passwd );
1253         return LUTIL_PASSWD_OK;
1254 }
1255 #endif
1256