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

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2004 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15
  16 /*
  17  * int lutil_passwd(
  18  *      const struct berval *passwd,
  19  *      const struct berval *cred,
  20  *      const char **schemes )
  21  *
  22  * Returns true if user supplied credentials (cred) matches
  23  * the stored password (passwd).
  24  *
  25  * Due to the use of the crypt(3) function
  26  * this routine is NOT thread-safe.
  27  */
  28
  29 #include "portable.h"
  30
  31 #include <stdio.h>
  32 #include <ac/stdlib.h>
  33 #include <ac/string.h>
  34 #include <ac/unistd.h>
  35
  36 #ifdef SLAPD_SPASSWD
  37 #       ifdef HAVE_SASL_SASL_H
  38 #               include <sasl/sasl.h>
  39 #       else
  40 #               include <sasl.h>
  41 #       endif
  42 #endif
  43
  44 #if defined(SLAPD_LMHASH)
  45 #       include <openssl/des.h>
  46 #endif /* SLAPD_LMHASH */
  47
  48 #include <ac/param.h>
  49
  50 #ifdef SLAPD_CRYPT
  51 # include <ac/crypt.h>
  52
  53 # if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
  54 #  ifdef HAVE_SHADOW_H
  55 #       include <shadow.h>
  56 #  endif
  57 #  ifdef HAVE_PWD_H
  58 #       include <pwd.h>
  59 #  endif
  60 #  ifdef HAVE_AIX_SECURITY
  61 #       include <userpw.h>
  62 #  endif
  63 # endif
  64 #endif
  65
  66 #include <lber.h>
  67
  68 #include "ldap_pvt.h"
  69 #include "lber_pvt.h"
  70
  71 #include "lutil_md5.h"
  72 #include "lutil_sha1.h"
  73 #include "lutil.h"
  74
  75 static const unsigned char crypt64[] =
  76         "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890./";
  77
  78 #ifdef SLAPD_CRYPT
  79 static char *salt_format = NULL;
  80 #endif
  81
  82 struct pw_scheme {
  83         struct berval name;
  84         LUTIL_PASSWD_CHK_FUNC *chk_fn;
  85         LUTIL_PASSWD_HASH_FUNC *hash_fn;
  86 };
  87
  88 struct pw_slist {
  89         struct pw_slist *next;
  90         struct pw_scheme s;
  91 };
  92
  93 /* password check routines */
  94
  95 #define SALT_SIZE       4
  96
  97 static LUTIL_PASSWD_CHK_FUNC chk_md5;
  98 static LUTIL_PASSWD_CHK_FUNC chk_smd5;
  99 static LUTIL_PASSWD_HASH_FUNC hash_smd5;
 100 static LUTIL_PASSWD_HASH_FUNC hash_md5;
 101
 102
 103 #ifdef LUTIL_SHA1_BYTES
 104 static LUTIL_PASSWD_CHK_FUNC chk_ssha1;
 105 static LUTIL_PASSWD_CHK_FUNC chk_sha1;
 106 static LUTIL_PASSWD_HASH_FUNC hash_sha1;
 107 static LUTIL_PASSWD_HASH_FUNC hash_ssha1;
 108 #endif
 109
 110 #ifdef SLAPD_LMHASH
 111 static LUTIL_PASSWD_CHK_FUNC chk_lanman;
 112 static LUTIL_PASSWD_HASH_FUNC hash_lanman;
 113 #endif
 114
 115 #ifdef SLAPD_SPASSWD
 116 static LUTIL_PASSWD_CHK_FUNC chk_sasl;
 117 #endif
 118
 119 #ifdef SLAPD_CRYPT
 120 static LUTIL_PASSWD_CHK_FUNC chk_crypt;
 121 static LUTIL_PASSWD_HASH_FUNC hash_crypt;
 122
 123 #if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
 124 static LUTIL_PASSWD_CHK_FUNC chk_unix;
 125 #endif
 126 #endif
 127
 128 /* password hash routines */
 129
 130 #ifdef SLAPD_CLEARTEXT
 131 static LUTIL_PASSWD_HASH_FUNC hash_clear;
 132 #endif
 133
 134 static struct pw_slist *pw_schemes;
 135
 136 static const struct pw_scheme pw_schemes_default[] =
 137 {
 138 #ifdef LUTIL_SHA1_BYTES
 139         { BER_BVC("{SSHA}"),            chk_ssha1, hash_ssha1 },
 140         { BER_BVC("{SHA}"),                     chk_sha1, hash_sha1 },
 141 #endif
 142
 143         { BER_BVC("{SMD5}"),            chk_smd5, hash_smd5 },
 144         { BER_BVC("{MD5}"),                     chk_md5, hash_md5 },
 145
 146 #ifdef SLAPD_LMHASH
 147         { BER_BVC("{LANMAN}"),          chk_lanman, hash_lanman },
 148 #endif /* SLAPD_LMHASH */
 149
 150 #ifdef SLAPD_SPASSWD
 151         { BER_BVC("{SASL}"),            chk_sasl, NULL },
 152 #endif
 153
 154 #ifdef SLAPD_CRYPT
 155         { BER_BVC("{CRYPT}"),           chk_crypt, hash_crypt },
 156 # if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
 157         { BER_BVC("{UNIX}"),            chk_unix, NULL },
 158 # endif
 159 #endif
 160
 161 #ifdef SLAPD_CLEARTEXT
 162         /* pseudo scheme */
 163         { {0, "{CLEARTEXT}"},           NULL, hash_clear },
 164 #endif
 165
 166         { BER_BVNULL, NULL, NULL }
 167 };
 168
 169 int lutil_passwd_add(
 170         struct berval *scheme,
 171         LUTIL_PASSWD_CHK_FUNC *chk,
 172         LUTIL_PASSWD_HASH_FUNC *hash )
 173 {
 174         struct pw_slist *ptr;
 175
 176         ptr = ber_memalloc( sizeof( struct pw_slist ));
 177         if (!ptr) return -1;
 178         ptr->next = pw_schemes;
 179         ptr->s.name = *scheme;
 180         ptr->s.chk_fn = chk;
 181         ptr->s.hash_fn = hash;
 182         pw_schemes = ptr;
 183         return 0;
 184 }
 185
 186 void lutil_passwd_init()
 187 {
 188         struct pw_scheme *s;
 189
 190         for( s=(struct pw_scheme *)pw_schemes_default; s->name.bv_val; s++) {
 191                 if ( lutil_passwd_add( &s->name, s->chk_fn, s->hash_fn ) ) break;
 192         }
 193 }
 194
 195 void lutil_passwd_destroy()
 196 {
 197         struct pw_slist *ptr, *next;
 198
 199         for( ptr=pw_schemes; ptr; ptr=next ) {
 200                 next = ptr->next;
 201                 ber_memfree( ptr );
 202         }
 203 }
 204
 205 static const struct pw_scheme *get_scheme(
 206         const char* scheme )
 207 {
 208         struct pw_slist *pws;
 209
 210         if (!pw_schemes) lutil_passwd_init();
 211
 212         for( pws=pw_schemes; pws; pws=pws->next ) {
 213                 if( strcasecmp(scheme, pws->s.name.bv_val ) == 0 ) {
 214                         return &(pws->s);
 215                 }
 216         }
 217
 218         return NULL;
 219 }
 220
 221 int lutil_passwd_scheme(
 222         const char* scheme )
 223 {
 224         if( scheme == NULL ) {
 225                 return 0;
 226         }
 227
 228         return get_scheme(scheme) != NULL;
 229 }
 230
 231
 232 static int is_allowed_scheme(
 233         const char* scheme,
 234         const char** schemes )
 235 {
 236         int i;
 237
 238         if( schemes == NULL ) return 1;
 239
 240         for( i=0; schemes[i] != NULL; i++ ) {
 241                 if( strcasecmp( scheme, schemes[i] ) == 0 ) {
 242                         return 1;
 243                 }
 244         }
 245         return 0;
 246 }
 247
 248 static struct berval *passwd_scheme(
 249         const struct pw_scheme *scheme,
 250         const struct berval * passwd,
 251         struct berval *bv,
 252         const char** allowed )
 253 {
 254         if( !is_allowed_scheme( scheme->name.bv_val, allowed ) ) {
 255                 return NULL;
 256         }
 257
 258         if( passwd->bv_len >= scheme->name.bv_len ) {
 259                 if( strncasecmp( passwd->bv_val, scheme->name.bv_val, scheme->name.bv_len ) == 0 ) {
 260                         bv->bv_val = &passwd->bv_val[scheme->name.bv_len];
 261                         bv->bv_len = passwd->bv_len - scheme->name.bv_len;
 262
 263                         return bv;
 264                 }
 265         }
 266
 267         return NULL;
 268 }
 269
 270 /*
 271  * Return 0 if creds are good.
 272  */
 273 int
 274 lutil_passwd(
 275         const struct berval *passwd,    /* stored passwd */
 276         const struct berval *cred,              /* user cred */
 277         const char **schemes,
 278         const char **text )
 279 {
 280         struct pw_slist *pws;
 281
 282         if ( text ) *text = NULL;
 283
 284         if (cred == NULL || cred->bv_len == 0 ||
 285                 passwd == NULL || passwd->bv_len == 0 )
 286         {
 287                 return -1;
 288         }
 289
 290         if (!pw_schemes) lutil_passwd_init();
 291
 292         for( pws=pw_schemes; pws; pws=pws->next ) {
 293                 if( pws->s.chk_fn ) {
 294                         struct berval x;
 295                         struct berval *p = passwd_scheme( &(pws->s),
 296                                 passwd, &x, schemes );
 297
 298                         if( p != NULL ) {
 299                                 return (pws->s.chk_fn)( &(pws->s.name), p, cred, text );
 300                         }
 301                 }
 302         }
 303
 304 #ifdef SLAPD_CLEARTEXT
 305         if( is_allowed_scheme("{CLEARTEXT}", schemes ) ) {
 306                 return (( passwd->bv_len == cred->bv_len ) &&
 307                                 ( passwd->bv_val[0] != '{' /*'}'*/ ))
 308                         ? memcmp( passwd->bv_val, cred->bv_val, passwd->bv_len )
 309                         : 1;
 310         }
 311 #endif
 312         return 1;
 313 }
 314
 315 int lutil_passwd_generate( struct berval *pw, ber_len_t len )
 316 {
 317
 318         if( len < 1 ) return -1;
 319
 320         pw->bv_len = len;
 321         pw->bv_val = ber_memalloc( len + 1 );
 322
 323         if( pw->bv_val == NULL ) {
 324                 return -1;
 325         }
 326
 327         if( lutil_entropy( (unsigned char *) pw->bv_val, pw->bv_len) < 0 ) {
 328                 return -1;
 329         }
 330
 331         for( len = 0; len < pw->bv_len; len++ ) {
 332                 pw->bv_val[len] = crypt64[
 333                         pw->bv_val[len] % (sizeof(crypt64)-1) ];
 334         }
 335
 336         pw->bv_val[len] = '\0';
 337
 338         return 0;
 339 }
 340
 341 int lutil_passwd_hash(
 342         const struct berval * passwd,
 343         const char * method,
 344         struct berval *hash,
 345         const char **text )
 346 {
 347         const struct pw_scheme *sc = get_scheme( method );
 348
 349         hash->bv_val = NULL;
 350         hash->bv_len = 0;
 351
 352         if( sc == NULL ) {
 353                 if( text ) *text = "scheme not recognized";
 354                 return -1;
 355         }
 356
 357         if( ! sc->hash_fn ) {
 358                 if( text ) *text = "scheme provided no hash function";
 359                 return -1;
 360         }
 361
 362         if( text ) *text = NULL;
 363
 364         return (sc->hash_fn)( &sc->name, passwd, hash, text );
 365 }
 366
 367 /* pw_string is only called when SLAPD_LMHASH or SLAPD_CRYPT is defined */
 368 #if defined(SLAPD_LMHASH) || defined(SLAPD_CRYPT)
 369 static int pw_string(
 370         const struct berval *sc,
 371         struct berval *passwd )
 372 {
 373         struct berval pw;
 374
 375         pw.bv_len = sc->bv_len + passwd->bv_len;
 376         pw.bv_val = ber_memalloc( pw.bv_len + 1 );
 377
 378         if( pw.bv_val == NULL ) {
 379                 return LUTIL_PASSWD_ERR;
 380         }
 381
 382         AC_MEMCPY( pw.bv_val, sc->bv_val, sc->bv_len );
 383         AC_MEMCPY( &pw.bv_val[sc->bv_len], passwd->bv_val, passwd->bv_len );
 384
 385         pw.bv_val[pw.bv_len] = '\0';
 386         *passwd = pw;
 387
 388         return LUTIL_PASSWD_OK;
 389 }
 390 #endif /* SLAPD_LMHASH || SLAPD_CRYPT */
 391
 392 static int pw_string64(
 393         const struct berval *sc,
 394         const struct berval *hash,
 395         struct berval *b64,
 396         const struct berval *salt )
 397 {
 398         int rc;
 399         struct berval string;
 400         size_t b64len;
 401
 402         if( salt ) {
 403                 /* need to base64 combined string */
 404                 string.bv_len = hash->bv_len + salt->bv_len;
 405                 string.bv_val = ber_memalloc( string.bv_len + 1 );
 406
 407                 if( string.bv_val == NULL ) {
 408                         return LUTIL_PASSWD_ERR;
 409                 }
 410
 411                 AC_MEMCPY( string.bv_val, hash->bv_val,
 412                         hash->bv_len );
 413                 AC_MEMCPY( &string.bv_val[hash->bv_len], salt->bv_val,
 414                         salt->bv_len );
 415                 string.bv_val[string.bv_len] = '\0';
 416
 417         } else {
 418                 string = *hash;
 419         }
 420
 421         b64len = LUTIL_BASE64_ENCODE_LEN( string.bv_len ) + 1;
 422         b64->bv_len = b64len + sc->bv_len;
 423         b64->bv_val = ber_memalloc( b64->bv_len + 1 );
 424
 425         if( b64->bv_val == NULL ) {
 426                 if( salt ) ber_memfree( string.bv_val );
 427                 return LUTIL_PASSWD_ERR;
 428         }
 429
 430         AC_MEMCPY(b64->bv_val, sc->bv_val, sc->bv_len);
 431
 432         rc = lutil_b64_ntop(
 433                 (unsigned char *) string.bv_val, string.bv_len,
 434                 &b64->bv_val[sc->bv_len], b64len );
 435
 436         if( salt ) ber_memfree( string.bv_val );
 437
 438         if( rc < 0 ) {
 439                 return LUTIL_PASSWD_ERR;
 440         }
 441
 442         /* recompute length */
 443         b64->bv_len = sc->bv_len + rc;
 444         assert( strlen(b64->bv_val) == b64->bv_len );
 445         return LUTIL_PASSWD_OK;
 446 }
 447
 448 /* PASSWORD CHECK ROUTINES */
 449
 450 #ifdef LUTIL_SHA1_BYTES
 451 static int chk_ssha1(
 452         const struct berval *sc,
 453         const struct berval * passwd,
 454         const struct berval * cred,
 455         const char **text )
 456 {
 457         lutil_SHA1_CTX SHA1context;
 458         unsigned char SHA1digest[LUTIL_SHA1_BYTES];
 459         int rc;
 460         unsigned char *orig_pass = NULL;
 461
 462         /* safety check */
 463         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <
 464                 sizeof(SHA1digest)+SALT_SIZE) {
 465                 return LUTIL_PASSWD_ERR;
 466         }
 467
 468         /* decode base64 password */
 469         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 470                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 471
 472         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 473
 474         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 475
 476         if (rc < (int)(sizeof(SHA1digest)+SALT_SIZE)) {
 477                 ber_memfree(orig_pass);
 478                 return LUTIL_PASSWD_ERR;
 479         }
 480
 481         /* hash credentials with salt */
 482         lutil_SHA1Init(&SHA1context);
 483         lutil_SHA1Update(&SHA1context,
 484                 (const unsigned char *) cred->bv_val, cred->bv_len);
 485         lutil_SHA1Update(&SHA1context,
 486                 (const unsigned char *) &orig_pass[sizeof(SHA1digest)],
 487                 rc - sizeof(SHA1digest));
 488         lutil_SHA1Final(SHA1digest, &SHA1context);
 489
 490         /* compare */
 491         rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
 492         ber_memfree(orig_pass);
 493         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 494 }
 495
 496 static int chk_sha1(
 497         const struct berval *sc,
 498         const struct berval * passwd,
 499         const struct berval * cred,
 500         const char **text )
 501 {
 502         lutil_SHA1_CTX SHA1context;
 503         unsigned char SHA1digest[LUTIL_SHA1_BYTES];
 504         int rc;
 505         unsigned char *orig_pass = NULL;
 506
 507         /* safety check */
 508         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) < sizeof(SHA1digest)) {
 509                 return LUTIL_PASSWD_ERR;
 510         }
 511
 512         /* base64 un-encode password */
 513         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 514                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 515
 516         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 517
 518         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 519
 520         if( rc != sizeof(SHA1digest) ) {
 521                 ber_memfree(orig_pass);
 522                 return LUTIL_PASSWD_ERR;
 523         }
 524
 525         /* hash credentials with salt */
 526         lutil_SHA1Init(&SHA1context);
 527         lutil_SHA1Update(&SHA1context,
 528                 (const unsigned char *) cred->bv_val, cred->bv_len);
 529         lutil_SHA1Final(SHA1digest, &SHA1context);
 530
 531         /* compare */
 532         rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
 533         ber_memfree(orig_pass);
 534         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 535 }
 536 #endif
 537
 538 static int chk_smd5(
 539         const struct berval *sc,
 540         const struct berval * passwd,
 541         const struct berval * cred,
 542         const char **text )
 543 {
 544         lutil_MD5_CTX MD5context;
 545         unsigned char MD5digest[LUTIL_MD5_BYTES];
 546         int rc;
 547         unsigned char *orig_pass = NULL;
 548
 549         /* safety check */
 550         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <
 551                 sizeof(MD5digest)+SALT_SIZE) {
 552                 return LUTIL_PASSWD_ERR;
 553         }
 554
 555         /* base64 un-encode password */
 556         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 557                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 558
 559         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 560
 561         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 562
 563         if (rc < (int)(sizeof(MD5digest)+SALT_SIZE)) {
 564                 ber_memfree(orig_pass);
 565                 return LUTIL_PASSWD_ERR;
 566         }
 567
 568         /* hash credentials with salt */
 569         lutil_MD5Init(&MD5context);
 570         lutil_MD5Update(&MD5context,
 571                 (const unsigned char *) cred->bv_val,
 572                 cred->bv_len );
 573         lutil_MD5Update(&MD5context,
 574                 &orig_pass[sizeof(MD5digest)],
 575                 rc - sizeof(MD5digest));
 576         lutil_MD5Final(MD5digest, &MD5context);
 577
 578         /* compare */
 579         rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
 580         ber_memfree(orig_pass);
 581         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 582 }
 583
 584 static int chk_md5(
 585         const struct berval *sc,
 586         const struct berval * passwd,
 587         const struct berval * cred,
 588         const char **text )
 589 {
 590         lutil_MD5_CTX MD5context;
 591         unsigned char MD5digest[LUTIL_MD5_BYTES];
 592         int rc;
 593         unsigned char *orig_pass = NULL;
 594
 595         /* safety check */
 596         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) < sizeof(MD5digest)) {
 597                 return LUTIL_PASSWD_ERR;
 598         }
 599
 600         /* base64 un-encode password */
 601         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 602                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 603
 604         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 605
 606         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 607         if ( rc != sizeof(MD5digest) ) {
 608                 ber_memfree(orig_pass);
 609                 return LUTIL_PASSWD_ERR;
 610         }
 611
 612         /* hash credentials with salt */
 613         lutil_MD5Init(&MD5context);
 614         lutil_MD5Update(&MD5context,
 615                 (const unsigned char *) cred->bv_val,
 616                 cred->bv_len );
 617         lutil_MD5Final(MD5digest, &MD5context);
 618
 619         /* compare */
 620         rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
 621         ber_memfree(orig_pass);
 622         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 623 }
 624
 625 #ifdef SLAPD_LMHASH
 626 /* pseudocode from RFC2433
 627  * A.2 LmPasswordHash()
 628  *
 629  *    LmPasswordHash(
 630  *    IN  0-to-14-oem-char Password,
 631  *    OUT 16-octet         PasswordHash )
 632  *    {
 633  *       Set UcasePassword to the uppercased Password
 634  *       Zero pad UcasePassword to 14 characters
 635  *
 636  *       DesHash( 1st 7-octets of UcasePassword,
 637  *                giving 1st 8-octets of PasswordHash )
 638  *
 639  *       DesHash( 2nd 7-octets of UcasePassword,
 640  *                giving 2nd 8-octets of PasswordHash )
 641  *    }
 642  *
 643  *
 644  * A.3 DesHash()
 645  *
 646  *    DesHash(
 647  *    IN  7-octet Clear,
 648  *    OUT 8-octet Cypher )
 649  *    {
 650  *        *
 651  *        * Make Cypher an irreversibly encrypted form of Clear by
 652  *        * encrypting known text using Clear as the secret key.
 653  *        * The known text consists of the string
 654  *        *
 655  *        *              KGS!@#$%
 656  *        *
 657  *
 658  *       Set StdText to "KGS!@#$%"
 659  *       DesEncrypt( StdText, Clear, giving Cypher )
 660  *    }
 661  *
 662  *
 663  * A.4 DesEncrypt()
 664  *
 665  *    DesEncrypt(
 666  *    IN  8-octet Clear,
 667  *    IN  7-octet Key,
 668  *    OUT 8-octet Cypher )
 669  *    {
 670  *        *
 671  *        * Use the DES encryption algorithm [4] in ECB mode [9]
 672  *        * to encrypt Clear into Cypher such that Cypher can
 673  *        * only be decrypted back to Clear by providing Key.
 674  *        * Note that the DES algorithm takes as input a 64-bit
 675  *        * stream where the 8th, 16th, 24th, etc.  bits are
 676  *        * parity bits ignored by the encrypting algorithm.
 677  *        * Unless you write your own DES to accept 56-bit input
 678  *        * without parity, you will need to insert the parity bits
 679  *        * yourself.
 680  *        *
 681  *    }
 682  */
 683
 684 static void lmPasswd_to_key(
 685         const unsigned char *lmPasswd,
 686         des_cblock *key)
 687 {
 688         /* make room for parity bits */
 689         ((char *)key)[0] = lmPasswd[0];
 690         ((char *)key)[1] = ((lmPasswd[0]&0x01)<<7) | (lmPasswd[1]>>1);
 691         ((char *)key)[2] = ((lmPasswd[1]&0x03)<<6) | (lmPasswd[2]>>2);
 692         ((char *)key)[3] = ((lmPasswd[2]&0x07)<<5) | (lmPasswd[3]>>3);
 693         ((char *)key)[4] = ((lmPasswd[3]&0x0F)<<4) | (lmPasswd[4]>>4);
 694         ((char *)key)[5] = ((lmPasswd[4]&0x1F)<<3) | (lmPasswd[5]>>5);
 695         ((char *)key)[6] = ((lmPasswd[5]&0x3F)<<2) | (lmPasswd[6]>>6);
 696         ((char *)key)[7] = ((lmPasswd[6]&0x7F)<<1);
 697
 698         des_set_odd_parity( key );
 699 }
 700
 701 static int chk_lanman(
 702         const struct berval *scheme,
 703         const struct berval *passwd,
 704         const struct berval *cred,
 705         const char **text )
 706 {
 707         int i;
 708         char UcasePassword[15];
 709         des_cblock key;
 710         des_key_schedule schedule;
 711         des_cblock StdText = "KGS!@#$%";
 712         des_cblock PasswordHash1, PasswordHash2;
 713         char PasswordHash[33], storedPasswordHash[33];
 714
 715         for( i=0; i<cred->bv_len; i++) {
 716                 if(cred->bv_val[i] == '\0') {
 717                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 718                 }
 719         }
 720
 721         if( cred->bv_val[i] != '\0' ) {
 722                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 723         }
 724
 725         strncpy( UcasePassword, cred->bv_val, 14 );
 726         UcasePassword[14] = '\0';
 727         ldap_pvt_str2upper( UcasePassword );
 728
 729         lmPasswd_to_key( UcasePassword, &key );
 730         des_set_key_unchecked( &key, schedule );
 731         des_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT );
 732
 733         lmPasswd_to_key( &UcasePassword[7], &key );
 734         des_set_key_unchecked( &key, schedule );
 735         des_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT );
 736
 737         sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 738                 PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3],
 739                 PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7],
 740                 PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3],
 741                 PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] );
 742
 743         /* as a precaution convert stored password hash to lower case */
 744         strncpy( storedPasswordHash, passwd->bv_val, 32 );
 745         storedPasswordHash[32] = '\0';
 746         ldap_pvt_str2lower( storedPasswordHash );
 747
 748         return memcmp( PasswordHash, storedPasswordHash, 32) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 749 }
 750 #endif /* SLAPD_LMHASH */
 751
 752 #ifdef SLAPD_SPASSWD
 753 #ifdef HAVE_CYRUS_SASL
 754 sasl_conn_t *lutil_passwd_sasl_conn = NULL;
 755 #endif
 756
 757 static int chk_sasl(
 758         const struct berval *sc,
 759         const struct berval * passwd,
 760         const struct berval * cred,
 761         const char **text )
 762 {
 763         unsigned int i;
 764         int rtn;
 765
 766         for( i=0; i<cred->bv_len; i++) {
 767                 if(cred->bv_val[i] == '\0') {
 768                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 769                 }
 770         }
 771
 772         if( cred->bv_val[i] != '\0' ) {
 773                 return LUTIL_PASSWD_ERR;        /* cred must behave like a string */
 774         }
 775
 776         for( i=0; i<passwd->bv_len; i++) {
 777                 if(passwd->bv_val[i] == '\0') {
 778                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 779                 }
 780         }
 781
 782         if( passwd->bv_val[i] != '\0' ) {
 783                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 784         }
 785
 786         rtn = LUTIL_PASSWD_ERR;
 787
 788 #ifdef HAVE_CYRUS_SASL
 789         if( lutil_passwd_sasl_conn != NULL ) {
 790                 int sc;
 791 # if SASL_VERSION_MAJOR < 2
 792                 sc = sasl_checkpass( lutil_passwd_sasl_conn,
 793                         passwd->bv_val, passwd->bv_len,
 794                         cred->bv_val, cred->bv_len,
 795                         text );
 796 # else
 797                 sc = sasl_checkpass( lutil_passwd_sasl_conn,
 798                         passwd->bv_val, passwd->bv_len,
 799                         cred->bv_val, cred->bv_len );
 800 # endif
 801                 rtn = ( sc != SASL_OK ) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 802         }
 803 #endif
 804
 805         return rtn;
 806 }
 807 #endif
 808
 809 #ifdef SLAPD_CRYPT
 810 static int chk_crypt(
 811         const struct berval *sc,
 812         const struct berval * passwd,
 813         const struct berval * cred,
 814         const char **text )
 815 {
 816         char *cr;
 817         unsigned int i;
 818
 819         for( i=0; i<cred->bv_len; i++) {
 820                 if(cred->bv_val[i] == '\0') {
 821                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 822                 }
 823         }
 824
 825         if( cred->bv_val[i] != '\0' ) {
 826                 return LUTIL_PASSWD_ERR;        /* cred must behave like a string */
 827         }
 828
 829         if( passwd->bv_len < 2 ) {
 830                 return LUTIL_PASSWD_ERR;        /* passwd must be at least two characters long */
 831         }
 832
 833         for( i=0; i<passwd->bv_len; i++) {
 834                 if(passwd->bv_val[i] == '\0') {
 835                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 836                 }
 837         }
 838
 839         if( passwd->bv_val[i] != '\0' ) {
 840                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 841         }
 842
 843         cr = crypt( cred->bv_val, passwd->bv_val );
 844
 845         if( cr == NULL || cr[0] == '\0' ) {
 846                 /* salt must have been invalid */
 847                 return LUTIL_PASSWD_ERR;
 848         }
 849
 850         return strcmp( passwd->bv_val, cr ) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 851 }
 852
 853 # if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
 854 static int chk_unix(
 855         const struct berval *sc,
 856         const struct berval * passwd,
 857         const struct berval * cred,
 858         const char **text )
 859 {
 860         unsigned int i;
 861         char *pw,*cr;
 862
 863         for( i=0; i<cred->bv_len; i++) {
 864                 if(cred->bv_val[i] == '\0') {
 865                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 866                 }
 867         }
 868         if( cred->bv_val[i] != '\0' ) {
 869                 return LUTIL_PASSWD_ERR;        /* cred must behave like a string */
 870         }
 871
 872         for( i=0; i<passwd->bv_len; i++) {
 873                 if(passwd->bv_val[i] == '\0') {
 874                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 875                 }
 876         }
 877
 878         if( passwd->bv_val[i] != '\0' ) {
 879                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 880         }
 881
 882         {
 883                 struct passwd *pwd = getpwnam(passwd->bv_val);
 884
 885                 if(pwd == NULL) {
 886                         return LUTIL_PASSWD_ERR;        /* not found */
 887                 }
 888
 889                 pw = pwd->pw_passwd;
 890         }
 891 #  ifdef HAVE_GETSPNAM
 892         {
 893                 struct spwd *spwd = getspnam(passwd->bv_val);
 894
 895                 if(spwd != NULL) {
 896                         pw = spwd->sp_pwdp;
 897                 }
 898         }
 899 #  endif
 900 #  ifdef HAVE_AIX_SECURITY
 901         {
 902                 struct userpw *upw = getuserpw(passwd->bv_val);
 903
 904                 if (upw != NULL) {
 905                         pw = upw->upw_passwd;
 906                 }
 907         }
 908 #  endif
 909
 910         if( pw == NULL || pw[0] == '\0' || pw[1] == '\0' ) {
 911                 /* password must must be at least two characters long */
 912                 return LUTIL_PASSWD_ERR;
 913         }
 914
 915         cr = crypt(cred->bv_val, pw);
 916
 917         if( cr == NULL || cr[0] == '\0' ) {
 918                 /* salt must have been invalid */
 919                 return LUTIL_PASSWD_ERR;
 920         }
 921
 922         return strcmp(pw, cr) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 923
 924 }
 925 # endif
 926 #endif
 927
 928 /* PASSWORD GENERATION ROUTINES */
 929
 930 #ifdef LUTIL_SHA1_BYTES
 931 static int hash_ssha1(
 932         const struct berval *scheme,
 933         const struct berval  *passwd,
 934         struct berval *hash,
 935         const char **text )
 936 {
 937         lutil_SHA1_CTX  SHA1context;
 938         unsigned char   SHA1digest[LUTIL_SHA1_BYTES];
 939         char            saltdata[SALT_SIZE];
 940         struct berval digest;
 941         struct berval salt;
 942
 943         digest.bv_val = (char *) SHA1digest;
 944         digest.bv_len = sizeof(SHA1digest);
 945         salt.bv_val = saltdata;
 946         salt.bv_len = sizeof(saltdata);
 947
 948         if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) {
 949                 return LUTIL_PASSWD_ERR;
 950         }
 951
 952         lutil_SHA1Init( &SHA1context );
 953         lutil_SHA1Update( &SHA1context,
 954                 (const unsigned char *)passwd->bv_val, passwd->bv_len );
 955         lutil_SHA1Update( &SHA1context,
 956                 (const unsigned char *)salt.bv_val, salt.bv_len );
 957         lutil_SHA1Final( SHA1digest, &SHA1context );
 958
 959         return pw_string64( scheme, &digest, hash, &salt);
 960 }
 961
 962 static int hash_sha1(
 963         const struct berval *scheme,
 964         const struct berval  *passwd,
 965         struct berval *hash,
 966         const char **text )
 967 {
 968         lutil_SHA1_CTX  SHA1context;
 969         unsigned char   SHA1digest[LUTIL_SHA1_BYTES];
 970         struct berval digest;
 971         digest.bv_val = (char *) SHA1digest;
 972         digest.bv_len = sizeof(SHA1digest);
 973
 974         lutil_SHA1Init( &SHA1context );
 975         lutil_SHA1Update( &SHA1context,
 976                 (const unsigned char *)passwd->bv_val, passwd->bv_len );
 977         lutil_SHA1Final( SHA1digest, &SHA1context );
 978
 979         return pw_string64( scheme, &digest, hash, NULL);
 980 }
 981 #endif
 982
 983 static int hash_smd5(
 984         const struct berval *scheme,
 985         const struct berval  *passwd,
 986         struct berval *hash,
 987         const char **text )
 988 {
 989         lutil_MD5_CTX   MD5context;
 990         unsigned char   MD5digest[LUTIL_MD5_BYTES];
 991         char            saltdata[SALT_SIZE];
 992         struct berval digest;
 993         struct berval salt;
 994
 995         digest.bv_val = (char *) MD5digest;
 996         digest.bv_len = sizeof(MD5digest);
 997         salt.bv_val = saltdata;
 998         salt.bv_len = sizeof(saltdata);
 999
1000         if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) {
1001                 return LUTIL_PASSWD_ERR;
1002         }
1003
1004         lutil_MD5Init( &MD5context );
1005         lutil_MD5Update( &MD5context,
1006                 (const unsigned char *) passwd->bv_val, passwd->bv_len );
1007         lutil_MD5Update( &MD5context,
1008                 (const unsigned char *) salt.bv_val, salt.bv_len );
1009         lutil_MD5Final( MD5digest, &MD5context );
1010
1011         return pw_string64( scheme, &digest, hash, &salt );
1012 }
1013
1014 static int hash_md5(
1015         const struct berval *scheme,
1016         const struct berval  *passwd,
1017         struct berval *hash,
1018         const char **text )
1019 {
1020         lutil_MD5_CTX   MD5context;
1021         unsigned char   MD5digest[LUTIL_MD5_BYTES];
1022
1023         struct berval digest;
1024
1025         digest.bv_val = (char *) MD5digest;
1026         digest.bv_len = sizeof(MD5digest);
1027
1028         lutil_MD5Init( &MD5context );
1029         lutil_MD5Update( &MD5context,
1030                 (const unsigned char *) passwd->bv_val, passwd->bv_len );
1031         lutil_MD5Final( MD5digest, &MD5context );
1032
1033         return pw_string64( scheme, &digest, hash, NULL );
1034 ;
1035 }
1036
1037 #ifdef SLAPD_LMHASH
1038 static int hash_lanman(
1039         const struct berval *scheme,
1040         const struct berval *passwd,
1041         struct berval *hash,
1042         const char **text )
1043 {
1044
1045         int i;
1046         char UcasePassword[15];
1047         des_cblock key;
1048         des_key_schedule schedule;
1049         des_cblock StdText = "KGS!@#$%";
1050         des_cblock PasswordHash1, PasswordHash2;
1051         char PasswordHash[33];
1052
1053         for( i=0; i<passwd->bv_len; i++) {
1054                 if(passwd->bv_val[i] == '\0') {
1055                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
1056                 }
1057         }
1058
1059         if( passwd->bv_val[i] != '\0' ) {
1060                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
1061         }
1062
1063         strncpy( UcasePassword, passwd->bv_val, 14 );
1064         UcasePassword[14] = '\0';
1065         ldap_pvt_str2upper( UcasePassword );
1066
1067         lmPasswd_to_key( UcasePassword, &key );
1068         des_set_key_unchecked( &key, schedule );
1069         des_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT );
1070
1071         lmPasswd_to_key( &UcasePassword[7], &key );
1072         des_set_key_unchecked( &key, schedule );
1073         des_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT );
1074
1075         sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
1076                 PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3],
1077                 PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7],
1078                 PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3],
1079                 PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] );
1080
1081         hash->bv_val = PasswordHash;
1082         hash->bv_len = 32;
1083
1084         return pw_string( scheme, hash );
1085 }
1086 #endif /* SLAPD_LMHASH */
1087
1088 #ifdef SLAPD_CRYPT
1089 static int hash_crypt(
1090         const struct berval *scheme,
1091         const struct berval *passwd,
1092         struct berval *hash,
1093         const char **text )
1094 {
1095         unsigned char salt[32]; /* salt suitable for most anything */
1096         unsigned int i;
1097
1098         for( i=0; i<passwd->bv_len; i++) {
1099                 if(passwd->bv_val[i] == '\0') {
1100                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
1101                 }
1102         }
1103
1104         if( passwd->bv_val[i] != '\0' ) {
1105                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
1106         }
1107
1108         if( lutil_entropy( salt, sizeof( salt ) ) < 0 ) {
1109                 return LUTIL_PASSWD_ERR;
1110         }
1111
1112         for( i=0; i< ( sizeof(salt) - 1 ); i++ ) {
1113                 salt[i] = crypt64[ salt[i] % (sizeof(crypt64)-1) ];
1114         }
1115         salt[sizeof( salt ) - 1 ] = '\0';
1116
1117         if( salt_format != NULL ) {
1118                 /* copy the salt we made into entropy before snprintfing
1119                    it back into the salt */
1120                 char entropy[sizeof(salt)];
1121                 strcpy( entropy, (char *) salt );
1122                 snprintf( (char *) salt, sizeof(entropy), salt_format, entropy );
1123         }
1124
1125         hash->bv_val = crypt( passwd->bv_val, (char *) salt );
1126
1127         if( hash->bv_val == NULL ) return -1;
1128
1129         hash->bv_len = strlen( hash->bv_val );
1130
1131         if( hash->bv_len == 0 ) {
1132                 return LUTIL_PASSWD_ERR;
1133         }
1134
1135         return pw_string( scheme, hash );
1136 }
1137 #endif
1138
1139 int lutil_salt_format(const char *format)
1140 {
1141 #ifdef SLAPD_CRYPT
1142         free( salt_format );
1143
1144         salt_format = format != NULL ? strdup( format ) : NULL;
1145 #endif
1146
1147         return 0;
1148 }
1149
1150 #ifdef SLAPD_CLEARTEXT
1151 static int hash_clear(
1152         const struct berval *scheme,
1153         const struct berval  *passwd,
1154         struct berval *hash,
1155         const char **text )
1156 {
1157         ber_dupbv( hash, (struct berval *)passwd );
1158         return LUTIL_PASSWD_OK;
1159 }
1160 #endif
1161