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 /* KLUDGE:
  77  *  chk_fn is NULL iff name is {CLEARTEXT}
  78  *      otherwise, things will break
  79  */
  80 struct pw_scheme {
  81         struct berval name;
  82         LUTIL_PASSWD_CHK_FUNC *chk_fn;
  83         LUTIL_PASSWD_HASH_FUNC *hash_fn;
  84 };
  85
  86 struct pw_slist {
  87         struct pw_slist *next;
  88         struct pw_scheme s;
  89 };
  90
  91 /* password check routines */
  92
  93 #define SALT_SIZE       4
  94
  95 static LUTIL_PASSWD_CHK_FUNC chk_md5;
  96 static LUTIL_PASSWD_CHK_FUNC chk_smd5;
  97 static LUTIL_PASSWD_HASH_FUNC hash_smd5;
  98 static LUTIL_PASSWD_HASH_FUNC hash_md5;
  99
 100
 101 #ifdef LUTIL_SHA1_BYTES
 102 static LUTIL_PASSWD_CHK_FUNC chk_ssha1;
 103 static LUTIL_PASSWD_CHK_FUNC chk_sha1;
 104 static LUTIL_PASSWD_HASH_FUNC hash_sha1;
 105 static LUTIL_PASSWD_HASH_FUNC hash_ssha1;
 106 #endif
 107
 108 #ifdef SLAPD_LMHASH
 109 static LUTIL_PASSWD_CHK_FUNC chk_lanman;
 110 static LUTIL_PASSWD_HASH_FUNC hash_lanman;
 111 #endif
 112
 113 #ifdef SLAPD_CRYPT
 114 static LUTIL_PASSWD_CHK_FUNC chk_crypt;
 115 static LUTIL_PASSWD_HASH_FUNC hash_crypt;
 116
 117 #if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD )
 118 static LUTIL_PASSWD_CHK_FUNC chk_unix;
 119 #endif
 120 #endif
 121
 122 /* password hash routines */
 123
 124 #ifdef SLAPD_CLEARTEXT
 125 static LUTIL_PASSWD_HASH_FUNC hash_clear;
 126 #endif
 127
 128 static struct pw_slist *pw_schemes;
 129 static int pw_inited;
 130
 131 static const struct pw_scheme pw_schemes_default[] =
 132 {
 133 #ifdef LUTIL_SHA1_BYTES
 134         { BER_BVC("{SSHA}"),            chk_ssha1, hash_ssha1 },
 135         { BER_BVC("{SHA}"),                     chk_sha1, hash_sha1 },
 136 #endif
 137
 138         { BER_BVC("{SMD5}"),            chk_smd5, hash_smd5 },
 139         { BER_BVC("{MD5}"),                     chk_md5, hash_md5 },
 140
 141 #ifdef SLAPD_LMHASH
 142         { BER_BVC("{LANMAN}"),          chk_lanman, hash_lanman },
 143 #endif /* SLAPD_LMHASH */
 144
 145 #ifdef SLAPD_CRYPT
 146         { BER_BVC("{CRYPT}"),           chk_crypt, hash_crypt },
 147 # if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD )
 148         { BER_BVC("{UNIX}"),            chk_unix, NULL },
 149 # endif
 150 #endif
 151
 152 #ifdef SLAPD_CLEARTEXT
 153         /* pseudo scheme */
 154         { BER_BVC("{CLEARTEXT}"),       NULL, hash_clear },
 155 #endif
 156
 157         { BER_BVNULL, NULL, NULL }
 158 };
 159
 160 int lutil_passwd_add(
 161         struct berval *scheme,
 162         LUTIL_PASSWD_CHK_FUNC *chk,
 163         LUTIL_PASSWD_HASH_FUNC *hash )
 164 {
 165         struct pw_slist *ptr;
 166
 167         if (!pw_inited) lutil_passwd_init();
 168
 169         ptr = ber_memalloc( sizeof( struct pw_slist ));
 170         if (!ptr) return -1;
 171         ptr->next = pw_schemes;
 172         ptr->s.name = *scheme;
 173         ptr->s.chk_fn = chk;
 174         ptr->s.hash_fn = hash;
 175         pw_schemes = ptr;
 176         return 0;
 177 }
 178
 179 void lutil_passwd_init()
 180 {
 181         struct pw_scheme *s;
 182
 183         pw_inited = 1;
 184
 185         for( s=(struct pw_scheme *)pw_schemes_default; s->name.bv_val; s++) {
 186                 if ( lutil_passwd_add( &s->name, s->chk_fn, s->hash_fn ) ) break;
 187         }
 188 }
 189
 190 void lutil_passwd_destroy()
 191 {
 192         struct pw_slist *ptr, *next;
 193
 194         for( ptr=pw_schemes; ptr; ptr=next ) {
 195                 next = ptr->next;
 196                 ber_memfree( ptr );
 197         }
 198 }
 199
 200 static const struct pw_scheme *get_scheme(
 201         const char* scheme )
 202 {
 203         struct pw_slist *pws;
 204         struct berval bv;
 205
 206         if (!pw_inited) lutil_passwd_init();
 207
 208         bv.bv_val = strchr( scheme, '}' );
 209         if ( !bv.bv_val )
 210                 return NULL;
 211
 212         bv.bv_len = bv.bv_val - scheme + 1;
 213         bv.bv_val = (char *) scheme;
 214
 215         for( pws=pw_schemes; pws; pws=pws->next ) {
 216                 if ( ber_bvstrcasecmp(&bv, &pws->s.name ) == 0 ) {
 217                         return &(pws->s);
 218                 }
 219         }
 220
 221         return NULL;
 222 }
 223
 224 int lutil_passwd_scheme(
 225         const char* scheme )
 226 {
 227         if( scheme == NULL ) {
 228                 return 0;
 229         }
 230
 231         return get_scheme(scheme) != NULL;
 232 }
 233
 234
 235 static int is_allowed_scheme(
 236         const char* scheme,
 237         const char** schemes )
 238 {
 239         int i;
 240
 241         if( schemes == NULL ) return 1;
 242
 243         for( i=0; schemes[i] != NULL; i++ ) {
 244                 if( strcasecmp( scheme, schemes[i] ) == 0 ) {
 245                         return 1;
 246                 }
 247         }
 248         return 0;
 249 }
 250
 251 static struct berval *passwd_scheme(
 252         const struct pw_scheme *scheme,
 253         const struct berval * passwd,
 254         struct berval *bv,
 255         const char** allowed )
 256 {
 257         if( !is_allowed_scheme( scheme->name.bv_val, allowed ) ) {
 258                 return NULL;
 259         }
 260
 261         if( passwd->bv_len >= scheme->name.bv_len ) {
 262                 if( strncasecmp( passwd->bv_val, scheme->name.bv_val, scheme->name.bv_len ) == 0 ) {
 263                         bv->bv_val = &passwd->bv_val[scheme->name.bv_len];
 264                         bv->bv_len = passwd->bv_len - scheme->name.bv_len;
 265
 266                         return bv;
 267                 }
 268         }
 269
 270         return NULL;
 271 }
 272
 273 /*
 274  * Return 0 if creds are good.
 275  */
 276 int
 277 lutil_passwd(
 278         const struct berval *passwd,    /* stored passwd */
 279         const struct berval *cred,              /* user cred */
 280         const char **schemes,
 281         const char **text )
 282 {
 283         struct pw_slist *pws;
 284
 285         if ( text ) *text = NULL;
 286
 287         if (cred == NULL || cred->bv_len == 0 ||
 288                 passwd == NULL || passwd->bv_len == 0 )
 289         {
 290                 return -1;
 291         }
 292
 293         if (!pw_inited) lutil_passwd_init();
 294
 295         for( pws=pw_schemes; pws; pws=pws->next ) {
 296                 if( pws->s.chk_fn ) {
 297                         struct berval x;
 298                         struct berval *p = passwd_scheme( &(pws->s),
 299                                 passwd, &x, schemes );
 300
 301                         if( p != NULL ) {
 302                                 return (pws->s.chk_fn)( &(pws->s.name), p, cred, text );
 303                         }
 304                 }
 305         }
 306
 307 #ifdef SLAPD_CLEARTEXT
 308         /* Do we think there is a scheme specifier here that we
 309          * didn't recognize? Assume a scheme name is at least 1 character.
 310          */
 311         if (( passwd->bv_val[0] == '{' ) &&
 312                 ( strchr( passwd->bv_val, '}' ) > passwd->bv_val+1 ))
 313         {
 314                 return 1;
 315         }
 316         if( is_allowed_scheme("{CLEARTEXT}", schemes ) ) {
 317                 return ( passwd->bv_len == cred->bv_len ) ?
 318                         memcmp( passwd->bv_val, cred->bv_val, passwd->bv_len )
 319                         : 1;
 320         }
 321 #endif
 322         return 1;
 323 }
 324
 325 int lutil_passwd_generate( struct berval *pw, ber_len_t len )
 326 {
 327
 328         if( len < 1 ) return -1;
 329
 330         pw->bv_len = len;
 331         pw->bv_val = ber_memalloc( len + 1 );
 332
 333         if( pw->bv_val == NULL ) {
 334                 return -1;
 335         }
 336
 337         if( lutil_entropy( (unsigned char *) pw->bv_val, pw->bv_len) < 0 ) {
 338                 return -1;
 339         }
 340
 341         for( len = 0; len < pw->bv_len; len++ ) {
 342                 pw->bv_val[len] = crypt64[
 343                         pw->bv_val[len] % (sizeof(crypt64)-1) ];
 344         }
 345
 346         pw->bv_val[len] = '\0';
 347
 348         return 0;
 349 }
 350
 351 int lutil_passwd_hash(
 352         const struct berval * passwd,
 353         const char * method,
 354         struct berval *hash,
 355         const char **text )
 356 {
 357         const struct pw_scheme *sc = get_scheme( method );
 358
 359         hash->bv_val = NULL;
 360         hash->bv_len = 0;
 361
 362         if( sc == NULL ) {
 363                 if( text ) *text = "scheme not recognized";
 364                 return -1;
 365         }
 366
 367         if( ! sc->hash_fn ) {
 368                 if( text ) *text = "scheme provided no hash function";
 369                 return -1;
 370         }
 371
 372         if( text ) *text = NULL;
 373
 374         return (sc->hash_fn)( &sc->name, passwd, hash, text );
 375 }
 376
 377 /* pw_string is only called when SLAPD_LMHASH or SLAPD_CRYPT is defined */
 378 #if defined(SLAPD_LMHASH) || defined(SLAPD_CRYPT)
 379 static int pw_string(
 380         const struct berval *sc,
 381         struct berval *passwd )
 382 {
 383         struct berval pw;
 384
 385         pw.bv_len = sc->bv_len + passwd->bv_len;
 386         pw.bv_val = ber_memalloc( pw.bv_len + 1 );
 387
 388         if( pw.bv_val == NULL ) {
 389                 return LUTIL_PASSWD_ERR;
 390         }
 391
 392         AC_MEMCPY( pw.bv_val, sc->bv_val, sc->bv_len );
 393         AC_MEMCPY( &pw.bv_val[sc->bv_len], passwd->bv_val, passwd->bv_len );
 394
 395         pw.bv_val[pw.bv_len] = '\0';
 396         *passwd = pw;
 397
 398         return LUTIL_PASSWD_OK;
 399 }
 400 #endif /* SLAPD_LMHASH || SLAPD_CRYPT */
 401
 402 static int pw_string64(
 403         const struct berval *sc,
 404         const struct berval *hash,
 405         struct berval *b64,
 406         const struct berval *salt )
 407 {
 408         int rc;
 409         struct berval string;
 410         size_t b64len;
 411
 412         if( salt ) {
 413                 /* need to base64 combined string */
 414                 string.bv_len = hash->bv_len + salt->bv_len;
 415                 string.bv_val = ber_memalloc( string.bv_len + 1 );
 416
 417                 if( string.bv_val == NULL ) {
 418                         return LUTIL_PASSWD_ERR;
 419                 }
 420
 421                 AC_MEMCPY( string.bv_val, hash->bv_val,
 422                         hash->bv_len );
 423                 AC_MEMCPY( &string.bv_val[hash->bv_len], salt->bv_val,
 424                         salt->bv_len );
 425                 string.bv_val[string.bv_len] = '\0';
 426
 427         } else {
 428                 string = *hash;
 429         }
 430
 431         b64len = LUTIL_BASE64_ENCODE_LEN( string.bv_len ) + 1;
 432         b64->bv_len = b64len + sc->bv_len;
 433         b64->bv_val = ber_memalloc( b64->bv_len + 1 );
 434
 435         if( b64->bv_val == NULL ) {
 436                 if( salt ) ber_memfree( string.bv_val );
 437                 return LUTIL_PASSWD_ERR;
 438         }
 439
 440         AC_MEMCPY(b64->bv_val, sc->bv_val, sc->bv_len);
 441
 442         rc = lutil_b64_ntop(
 443                 (unsigned char *) string.bv_val, string.bv_len,
 444                 &b64->bv_val[sc->bv_len], b64len );
 445
 446         if( salt ) ber_memfree( string.bv_val );
 447
 448         if( rc < 0 ) {
 449                 return LUTIL_PASSWD_ERR;
 450         }
 451
 452         /* recompute length */
 453         b64->bv_len = sc->bv_len + rc;
 454         assert( strlen(b64->bv_val) == b64->bv_len );
 455         return LUTIL_PASSWD_OK;
 456 }
 457
 458 /* PASSWORD CHECK ROUTINES */
 459
 460 #ifdef LUTIL_SHA1_BYTES
 461 static int chk_ssha1(
 462         const struct berval *sc,
 463         const struct berval * passwd,
 464         const struct berval * cred,
 465         const char **text )
 466 {
 467         lutil_SHA1_CTX SHA1context;
 468         unsigned char SHA1digest[LUTIL_SHA1_BYTES];
 469         int rc;
 470         unsigned char *orig_pass = NULL;
 471
 472         /* safety check -- must have some salt */
 473         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <= sizeof(SHA1digest)) {
 474                 return LUTIL_PASSWD_ERR;
 475         }
 476
 477         /* decode base64 password */
 478         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 479                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 480
 481         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 482
 483         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 484
 485         /* safety check -- must have some salt */
 486         if (rc <= (int)(sizeof(SHA1digest))) {
 487                 ber_memfree(orig_pass);
 488                 return LUTIL_PASSWD_ERR;
 489         }
 490
 491         /* hash credentials with salt */
 492         lutil_SHA1Init(&SHA1context);
 493         lutil_SHA1Update(&SHA1context,
 494                 (const unsigned char *) cred->bv_val, cred->bv_len);
 495         lutil_SHA1Update(&SHA1context,
 496                 (const unsigned char *) &orig_pass[sizeof(SHA1digest)],
 497                 rc - sizeof(SHA1digest));
 498         lutil_SHA1Final(SHA1digest, &SHA1context);
 499
 500         /* compare */
 501         rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
 502         ber_memfree(orig_pass);
 503         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 504 }
 505
 506 static int chk_sha1(
 507         const struct berval *sc,
 508         const struct berval * passwd,
 509         const struct berval * cred,
 510         const char **text )
 511 {
 512         lutil_SHA1_CTX SHA1context;
 513         unsigned char SHA1digest[LUTIL_SHA1_BYTES];
 514         int rc;
 515         unsigned char *orig_pass = NULL;
 516
 517         /* safety check */
 518         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) < sizeof(SHA1digest)) {
 519                 return LUTIL_PASSWD_ERR;
 520         }
 521
 522         /* base64 un-encode password */
 523         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 524                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 525
 526         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 527
 528         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 529
 530         if( rc != sizeof(SHA1digest) ) {
 531                 ber_memfree(orig_pass);
 532                 return LUTIL_PASSWD_ERR;
 533         }
 534
 535         /* hash credentials with salt */
 536         lutil_SHA1Init(&SHA1context);
 537         lutil_SHA1Update(&SHA1context,
 538                 (const unsigned char *) cred->bv_val, cred->bv_len);
 539         lutil_SHA1Final(SHA1digest, &SHA1context);
 540
 541         /* compare */
 542         rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
 543         ber_memfree(orig_pass);
 544         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 545 }
 546 #endif
 547
 548 static int chk_smd5(
 549         const struct berval *sc,
 550         const struct berval * passwd,
 551         const struct berval * cred,
 552         const char **text )
 553 {
 554         lutil_MD5_CTX MD5context;
 555         unsigned char MD5digest[LUTIL_MD5_BYTES];
 556         int rc;
 557         unsigned char *orig_pass = NULL;
 558
 559         /* safety check */
 560         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <= sizeof(MD5digest)) {
 561                 return LUTIL_PASSWD_ERR;
 562         }
 563
 564         /* base64 un-encode password */
 565         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 566                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 567
 568         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 569
 570         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 571
 572         if (rc <= (int)(sizeof(MD5digest))) {
 573                 ber_memfree(orig_pass);
 574                 return LUTIL_PASSWD_ERR;
 575         }
 576
 577         /* hash credentials with salt */
 578         lutil_MD5Init(&MD5context);
 579         lutil_MD5Update(&MD5context,
 580                 (const unsigned char *) cred->bv_val,
 581                 cred->bv_len );
 582         lutil_MD5Update(&MD5context,
 583                 &orig_pass[sizeof(MD5digest)],
 584                 rc - sizeof(MD5digest));
 585         lutil_MD5Final(MD5digest, &MD5context);
 586
 587         /* compare */
 588         rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
 589         ber_memfree(orig_pass);
 590         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 591 }
 592
 593 static int chk_md5(
 594         const struct berval *sc,
 595         const struct berval * passwd,
 596         const struct berval * cred,
 597         const char **text )
 598 {
 599         lutil_MD5_CTX MD5context;
 600         unsigned char MD5digest[LUTIL_MD5_BYTES];
 601         int rc;
 602         unsigned char *orig_pass = NULL;
 603
 604         /* safety check */
 605         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) < sizeof(MD5digest)) {
 606                 return LUTIL_PASSWD_ERR;
 607         }
 608
 609         /* base64 un-encode password */
 610         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 611                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 612
 613         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 614
 615         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 616         if ( rc != sizeof(MD5digest) ) {
 617                 ber_memfree(orig_pass);
 618                 return LUTIL_PASSWD_ERR;
 619         }
 620
 621         /* hash credentials with salt */
 622         lutil_MD5Init(&MD5context);
 623         lutil_MD5Update(&MD5context,
 624                 (const unsigned char *) cred->bv_val,
 625                 cred->bv_len );
 626         lutil_MD5Final(MD5digest, &MD5context);
 627
 628         /* compare */
 629         rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
 630         ber_memfree(orig_pass);
 631         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 632 }
 633
 634 #ifdef SLAPD_LMHASH
 635 /* pseudocode from RFC2433
 636  * A.2 LmPasswordHash()
 637  *
 638  *    LmPasswordHash(
 639  *    IN  0-to-14-oem-char Password,
 640  *    OUT 16-octet         PasswordHash )
 641  *    {
 642  *       Set UcasePassword to the uppercased Password
 643  *       Zero pad UcasePassword to 14 characters
 644  *
 645  *       DesHash( 1st 7-octets of UcasePassword,
 646  *                giving 1st 8-octets of PasswordHash )
 647  *
 648  *       DesHash( 2nd 7-octets of UcasePassword,
 649  *                giving 2nd 8-octets of PasswordHash )
 650  *    }
 651  *
 652  *
 653  * A.3 DesHash()
 654  *
 655  *    DesHash(
 656  *    IN  7-octet Clear,
 657  *    OUT 8-octet Cypher )
 658  *    {
 659  *        *
 660  *        * Make Cypher an irreversibly encrypted form of Clear by
 661  *        * encrypting known text using Clear as the secret key.
 662  *        * The known text consists of the string
 663  *        *
 664  *        *              KGS!@#$%
 665  *        *
 666  *
 667  *       Set StdText to "KGS!@#$%"
 668  *       DesEncrypt( StdText, Clear, giving Cypher )
 669  *    }
 670  *
 671  *
 672  * A.4 DesEncrypt()
 673  *
 674  *    DesEncrypt(
 675  *    IN  8-octet Clear,
 676  *    IN  7-octet Key,
 677  *    OUT 8-octet Cypher )
 678  *    {
 679  *        *
 680  *        * Use the DES encryption algorithm [4] in ECB mode [9]
 681  *        * to encrypt Clear into Cypher such that Cypher can
 682  *        * only be decrypted back to Clear by providing Key.
 683  *        * Note that the DES algorithm takes as input a 64-bit
 684  *        * stream where the 8th, 16th, 24th, etc.  bits are
 685  *        * parity bits ignored by the encrypting algorithm.
 686  *        * Unless you write your own DES to accept 56-bit input
 687  *        * without parity, you will need to insert the parity bits
 688  *        * yourself.
 689  *        *
 690  *    }
 691  */
 692
 693 static void lmPasswd_to_key(
 694         const char *lmPasswd,
 695         des_cblock *key)
 696 {
 697         const unsigned char *lpw = (const unsigned char *) lmPasswd;
 698         unsigned char *k = (unsigned char *) key;
 699
 700         /* make room for parity bits */
 701         k[0] = lpw[0];
 702         k[1] = ((lpw[0] & 0x01) << 7) | (lpw[1] >> 1);
 703         k[2] = ((lpw[1] & 0x03) << 6) | (lpw[2] >> 2);
 704         k[3] = ((lpw[2] & 0x07) << 5) | (lpw[3] >> 3);
 705         k[4] = ((lpw[3] & 0x0F) << 4) | (lpw[4] >> 4);
 706         k[5] = ((lpw[4] & 0x1F) << 3) | (lpw[5] >> 5);
 707         k[6] = ((lpw[5] & 0x3F) << 2) | (lpw[6] >> 6);
 708         k[7] = ((lpw[6] & 0x7F) << 1);
 709
 710         des_set_odd_parity( key );
 711 }
 712
 713 static int chk_lanman(
 714         const struct berval *scheme,
 715         const struct berval *passwd,
 716         const struct berval *cred,
 717         const char **text )
 718 {
 719         int i;
 720         char UcasePassword[15];
 721         des_cblock key;
 722         des_key_schedule schedule;
 723         des_cblock StdText = "KGS!@#$%";
 724         des_cblock PasswordHash1, PasswordHash2;
 725         char PasswordHash[33], storedPasswordHash[33];
 726
 727         for( i=0; i<cred->bv_len; i++) {
 728                 if(cred->bv_val[i] == '\0') {
 729                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 730                 }
 731         }
 732
 733         if( cred->bv_val[i] != '\0' ) {
 734                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 735         }
 736
 737         strncpy( UcasePassword, cred->bv_val, 14 );
 738         UcasePassword[14] = '\0';
 739         ldap_pvt_str2upper( UcasePassword );
 740
 741         lmPasswd_to_key( UcasePassword, &key );
 742         des_set_key_unchecked( &key, schedule );
 743         des_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT );
 744
 745         lmPasswd_to_key( &UcasePassword[7], &key );
 746         des_set_key_unchecked( &key, schedule );
 747         des_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT );
 748
 749         sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 750                 PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3],
 751                 PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7],
 752                 PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3],
 753                 PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] );
 754
 755         /* as a precaution convert stored password hash to lower case */
 756         strncpy( storedPasswordHash, passwd->bv_val, 32 );
 757         storedPasswordHash[32] = '\0';
 758         ldap_pvt_str2lower( storedPasswordHash );
 759
 760         return memcmp( PasswordHash, storedPasswordHash, 32) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 761 }
 762 #endif /* SLAPD_LMHASH */
 763
 764 #ifdef SLAPD_CRYPT
 765 static int lutil_crypt(
 766         const char *key,
 767         const char *salt,
 768         char **hash )
 769 {
 770         char *cr = crypt( key, salt );
 771         int rc;
 772
 773         if( cr == NULL || cr[0] == '\0' ) {
 774                 /* salt must have been invalid */
 775                 rc = LUTIL_PASSWD_ERR;
 776         } else {
 777                 if ( hash ) {
 778                         *hash = ber_strdup( cr );
 779                         rc = LUTIL_PASSWD_OK;
 780                 } else {
 781                         rc = strcmp( salt, cr ) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 782                 }
 783         }
 784         return rc;
 785 }
 786
 787 static int chk_crypt(
 788         const struct berval *sc,
 789         const struct berval * passwd,
 790         const struct berval * cred,
 791         const char **text )
 792 {
 793         unsigned int i;
 794
 795         for( i=0; i<cred->bv_len; i++) {
 796                 if(cred->bv_val[i] == '\0') {
 797                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 798                 }
 799         }
 800
 801         if( cred->bv_val[i] != '\0' ) {
 802                 return LUTIL_PASSWD_ERR;        /* cred must behave like a string */
 803         }
 804
 805         if( passwd->bv_len < 2 ) {
 806                 return LUTIL_PASSWD_ERR;        /* passwd must be at least two characters long */
 807         }
 808
 809         for( i=0; i<passwd->bv_len; i++) {
 810                 if(passwd->bv_val[i] == '\0') {
 811                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 812                 }
 813         }
 814
 815         if( passwd->bv_val[i] != '\0' ) {
 816                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 817         }
 818
 819         return lutil_cryptptr( cred->bv_val, passwd->bv_val, NULL );
 820 }
 821
 822 # if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD )
 823 static int chk_unix(
 824         const struct berval *sc,
 825         const struct berval * passwd,
 826         const struct berval * cred,
 827         const char **text )
 828 {
 829         unsigned int i;
 830         char *pw;
 831
 832         for( i=0; i<cred->bv_len; i++) {
 833                 if(cred->bv_val[i] == '\0') {
 834                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 835                 }
 836         }
 837         if( cred->bv_val[i] != '\0' ) {
 838                 return LUTIL_PASSWD_ERR;        /* cred must behave like a string */
 839         }
 840
 841         for( i=0; i<passwd->bv_len; i++) {
 842                 if(passwd->bv_val[i] == '\0') {
 843                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 844                 }
 845         }
 846
 847         if( passwd->bv_val[i] != '\0' ) {
 848                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 849         }
 850
 851         {
 852                 struct passwd *pwd = getpwnam(passwd->bv_val);
 853
 854                 if(pwd == NULL) {
 855                         return LUTIL_PASSWD_ERR;        /* not found */
 856                 }
 857
 858                 pw = pwd->pw_passwd;
 859         }
 860 #  ifdef HAVE_GETSPNAM
 861         {
 862                 struct spwd *spwd = getspnam(passwd->bv_val);
 863
 864                 if(spwd != NULL) {
 865                         pw = spwd->sp_pwdp;
 866                 }
 867         }
 868 #  endif
 869 #  ifdef HAVE_AIX_SECURITY
 870         {
 871                 struct userpw *upw = getuserpw(passwd->bv_val);
 872
 873                 if (upw != NULL) {
 874                         pw = upw->upw_passwd;
 875                 }
 876         }
 877 #  endif
 878
 879         if( pw == NULL || pw[0] == '\0' || pw[1] == '\0' ) {
 880                 /* password must must be at least two characters long */
 881                 return LUTIL_PASSWD_ERR;
 882         }
 883
 884         return lutil_cryptptr( cred->bv_val, pw, NULL );
 885 }
 886 # endif
 887 #endif
 888
 889 /* PASSWORD GENERATION ROUTINES */
 890
 891 #ifdef LUTIL_SHA1_BYTES
 892 static int hash_ssha1(
 893         const struct berval *scheme,
 894         const struct berval  *passwd,
 895         struct berval *hash,
 896         const char **text )
 897 {
 898         lutil_SHA1_CTX  SHA1context;
 899         unsigned char   SHA1digest[LUTIL_SHA1_BYTES];
 900         char            saltdata[SALT_SIZE];
 901         struct berval digest;
 902         struct berval salt;
 903
 904         digest.bv_val = (char *) SHA1digest;
 905         digest.bv_len = sizeof(SHA1digest);
 906         salt.bv_val = saltdata;
 907         salt.bv_len = sizeof(saltdata);
 908
 909         if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) {
 910                 return LUTIL_PASSWD_ERR;
 911         }
 912
 913         lutil_SHA1Init( &SHA1context );
 914         lutil_SHA1Update( &SHA1context,
 915                 (const unsigned char *)passwd->bv_val, passwd->bv_len );
 916         lutil_SHA1Update( &SHA1context,
 917                 (const unsigned char *)salt.bv_val, salt.bv_len );
 918         lutil_SHA1Final( SHA1digest, &SHA1context );
 919
 920         return pw_string64( scheme, &digest, hash, &salt);
 921 }
 922
 923 static int hash_sha1(
 924         const struct berval *scheme,
 925         const struct berval  *passwd,
 926         struct berval *hash,
 927         const char **text )
 928 {
 929         lutil_SHA1_CTX  SHA1context;
 930         unsigned char   SHA1digest[LUTIL_SHA1_BYTES];
 931         struct berval digest;
 932         digest.bv_val = (char *) SHA1digest;
 933         digest.bv_len = sizeof(SHA1digest);
 934
 935         lutil_SHA1Init( &SHA1context );
 936         lutil_SHA1Update( &SHA1context,
 937                 (const unsigned char *)passwd->bv_val, passwd->bv_len );
 938         lutil_SHA1Final( SHA1digest, &SHA1context );
 939
 940         return pw_string64( scheme, &digest, hash, NULL);
 941 }
 942 #endif
 943
 944 static int hash_smd5(
 945         const struct berval *scheme,
 946         const struct berval  *passwd,
 947         struct berval *hash,
 948         const char **text )
 949 {
 950         lutil_MD5_CTX   MD5context;
 951         unsigned char   MD5digest[LUTIL_MD5_BYTES];
 952         char            saltdata[SALT_SIZE];
 953         struct berval digest;
 954         struct berval salt;
 955
 956         digest.bv_val = (char *) MD5digest;
 957         digest.bv_len = sizeof(MD5digest);
 958         salt.bv_val = saltdata;
 959         salt.bv_len = sizeof(saltdata);
 960
 961         if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) {
 962                 return LUTIL_PASSWD_ERR;
 963         }
 964
 965         lutil_MD5Init( &MD5context );
 966         lutil_MD5Update( &MD5context,
 967                 (const unsigned char *) passwd->bv_val, passwd->bv_len );
 968         lutil_MD5Update( &MD5context,
 969                 (const unsigned char *) salt.bv_val, salt.bv_len );
 970         lutil_MD5Final( MD5digest, &MD5context );
 971
 972         return pw_string64( scheme, &digest, hash, &salt );
 973 }
 974
 975 static int hash_md5(
 976         const struct berval *scheme,
 977         const struct berval  *passwd,
 978         struct berval *hash,
 979         const char **text )
 980 {
 981         lutil_MD5_CTX   MD5context;
 982         unsigned char   MD5digest[LUTIL_MD5_BYTES];
 983
 984         struct berval digest;
 985
 986         digest.bv_val = (char *) MD5digest;
 987         digest.bv_len = sizeof(MD5digest);
 988
 989         lutil_MD5Init( &MD5context );
 990         lutil_MD5Update( &MD5context,
 991                 (const unsigned char *) passwd->bv_val, passwd->bv_len );
 992         lutil_MD5Final( MD5digest, &MD5context );
 993
 994         return pw_string64( scheme, &digest, hash, NULL );
 995 ;
 996 }
 997
 998 #ifdef SLAPD_LMHASH
 999 static int hash_lanman(
1000         const struct berval *scheme,
1001         const struct berval *passwd,
1002         struct berval *hash,
1003         const char **text )
1004 {
1005
1006         int i;
1007         char UcasePassword[15];
1008         des_cblock key;
1009         des_key_schedule schedule;
1010         des_cblock StdText = "KGS!@#$%";
1011         des_cblock PasswordHash1, PasswordHash2;
1012         char PasswordHash[33];
1013
1014         for( i=0; i<passwd->bv_len; i++) {
1015                 if(passwd->bv_val[i] == '\0') {
1016                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
1017                 }
1018         }
1019
1020         if( passwd->bv_val[i] != '\0' ) {
1021                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
1022         }
1023
1024         strncpy( UcasePassword, passwd->bv_val, 14 );
1025         UcasePassword[14] = '\0';
1026         ldap_pvt_str2upper( UcasePassword );
1027
1028         lmPasswd_to_key( UcasePassword, &key );
1029         des_set_key_unchecked( &key, schedule );
1030         des_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT );
1031
1032         lmPasswd_to_key( &UcasePassword[7], &key );
1033         des_set_key_unchecked( &key, schedule );
1034         des_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT );
1035
1036         sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
1037                 PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3],
1038                 PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7],
1039                 PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3],
1040                 PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] );
1041
1042         hash->bv_val = PasswordHash;
1043         hash->bv_len = 32;
1044
1045         return pw_string( scheme, hash );
1046 }
1047 #endif /* SLAPD_LMHASH */
1048
1049 #ifdef SLAPD_CRYPT
1050 static int hash_crypt(
1051         const struct berval *scheme,
1052         const struct berval *passwd,
1053         struct berval *hash,
1054         const char **text )
1055 {
1056         unsigned char salt[32]; /* salt suitable for most anything */
1057         unsigned int i;
1058         char *save;
1059         int rc;
1060
1061         for( i=0; i<passwd->bv_len; i++) {
1062                 if(passwd->bv_val[i] == '\0') {
1063                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
1064                 }
1065         }
1066
1067         if( passwd->bv_val[i] != '\0' ) {
1068                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
1069         }
1070
1071         if( lutil_entropy( salt, sizeof( salt ) ) < 0 ) {
1072                 return LUTIL_PASSWD_ERR;
1073         }
1074
1075         for( i=0; i< ( sizeof(salt) - 1 ); i++ ) {
1076                 salt[i] = crypt64[ salt[i] % (sizeof(crypt64)-1) ];
1077         }
1078         salt[sizeof( salt ) - 1 ] = '\0';
1079
1080         if( salt_format != NULL ) {
1081                 /* copy the salt we made into entropy before snprintfing
1082                    it back into the salt */
1083                 char entropy[sizeof(salt)];
1084                 strcpy( entropy, (char *) salt );
1085                 snprintf( (char *) salt, sizeof(entropy), salt_format, entropy );
1086         }
1087
1088         rc = lutil_cryptptr( passwd->bv_val, (char *) salt, &hash->bv_val );
1089         if ( rc != LUTIL_PASSWD_OK ) return rc;
1090
1091         if( hash->bv_val == NULL ) return -1;
1092
1093         hash->bv_len = strlen( hash->bv_val );
1094
1095         save = hash->bv_val;
1096
1097         if( hash->bv_len == 0 ) {
1098                 rc = LUTIL_PASSWD_ERR;
1099         } else {
1100                 rc = pw_string( scheme, hash );
1101         }
1102         ber_memfree( save );
1103         return rc;
1104 }
1105 #endif
1106
1107 int lutil_salt_format(const char *format)
1108 {
1109 #ifdef SLAPD_CRYPT
1110         free( salt_format );
1111
1112         salt_format = format != NULL ? ber_strdup( format ) : NULL;
1113 #endif
1114
1115         return 0;
1116 }
1117
1118 #ifdef SLAPD_CLEARTEXT
1119 static int hash_clear(
1120         const struct berval *scheme,
1121         const struct berval  *passwd,
1122         struct berval *hash,
1123         const char **text )
1124 {
1125         ber_dupbv( hash, (struct berval *)passwd );
1126         return LUTIL_PASSWD_OK;
1127 }
1128 #endif
1129