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 1998-2017 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[1];
  44 #define des_failed(encrypted) 0
  45 #define des_finish(key, schedule)
  46
  47 #elif defined(HAVE_MOZNSS)
  48 /*
  49   hack hack hack
  50   We need to define this here so that nspr/obsolete/protypes.h will not be included
  51   if that file is included, it will create a uint32 typedef that will cause the
  52   one in lutil_sha1.h to blow up
  53 */
  54 #define PROTYPES_H 1
  55 #       include <nss/pk11pub.h>
  56 typedef PK11SymKey *des_key;
  57 typedef unsigned char des_data_block[8];
  58 typedef PK11Context *des_context[1];
  59 #define DES_ENCRYPT CKA_ENCRYPT
  60
  61 #endif
  62
  63 #endif /* SLAPD_LMHASH */
  64
  65 #include <ac/param.h>
  66
  67 #ifdef SLAPD_CRYPT
  68 # include <ac/crypt.h>
  69
  70 # if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD )
  71 #  ifdef HAVE_SHADOW_H
  72 #       include <shadow.h>
  73 #  endif
  74 #  ifdef HAVE_PWD_H
  75 #       include <pwd.h>
  76 #  endif
  77 #  ifdef HAVE_AIX_SECURITY
  78 #       include <userpw.h>
  79 #  endif
  80 # endif
  81 #endif
  82
  83 #include <lber.h>
  84
  85 #include "ldap_pvt.h"
  86 #include "lber_pvt.h"
  87
  88 #include "lutil_md5.h"
  89 #include "lutil_sha1.h"
  90 #include "lutil.h"
  91
  92 static const unsigned char crypt64[] =
  93         "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890./";
  94
  95 #ifdef SLAPD_CRYPT
  96 static char *salt_format = NULL;
  97 static lutil_cryptfunc lutil_crypt;
  98 lutil_cryptfunc *lutil_cryptptr = lutil_crypt;
  99 #endif
 100
 101 /* KLUDGE:
 102  *  chk_fn is NULL iff name is {CLEARTEXT}
 103  *      otherwise, things will break
 104  */
 105 struct pw_scheme {
 106         struct berval name;
 107         LUTIL_PASSWD_CHK_FUNC *chk_fn;
 108         LUTIL_PASSWD_HASH_FUNC *hash_fn;
 109 };
 110
 111 struct pw_slist {
 112         struct pw_slist *next;
 113         struct pw_scheme s;
 114 };
 115
 116 /* password check routines */
 117
 118 #define SALT_SIZE       4
 119
 120 static LUTIL_PASSWD_CHK_FUNC chk_md5;
 121 static LUTIL_PASSWD_CHK_FUNC chk_smd5;
 122 static LUTIL_PASSWD_HASH_FUNC hash_smd5;
 123 static LUTIL_PASSWD_HASH_FUNC hash_md5;
 124
 125
 126 #ifdef LUTIL_SHA1_BYTES
 127 static LUTIL_PASSWD_CHK_FUNC chk_ssha1;
 128 static LUTIL_PASSWD_CHK_FUNC chk_sha1;
 129 static LUTIL_PASSWD_HASH_FUNC hash_sha1;
 130 static LUTIL_PASSWD_HASH_FUNC hash_ssha1;
 131 #endif
 132
 133 #ifdef SLAPD_LMHASH
 134 static LUTIL_PASSWD_CHK_FUNC chk_lanman;
 135 static LUTIL_PASSWD_HASH_FUNC hash_lanman;
 136 #endif
 137
 138 #ifdef SLAPD_CRYPT
 139 static LUTIL_PASSWD_CHK_FUNC chk_crypt;
 140 static LUTIL_PASSWD_HASH_FUNC hash_crypt;
 141
 142 #if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD )
 143 static LUTIL_PASSWD_CHK_FUNC chk_unix;
 144 #endif
 145 #endif
 146
 147 /* password hash routines */
 148
 149 #ifdef SLAPD_CLEARTEXT
 150 static LUTIL_PASSWD_HASH_FUNC hash_clear;
 151 #endif
 152
 153 static struct pw_slist *pw_schemes;
 154 static int pw_inited;
 155
 156 static const struct pw_scheme pw_schemes_default[] =
 157 {
 158 #ifdef LUTIL_SHA1_BYTES
 159         { BER_BVC("{SSHA}"),            chk_ssha1, hash_ssha1 },
 160         { BER_BVC("{SHA}"),                     chk_sha1, hash_sha1 },
 161 #endif
 162
 163         { BER_BVC("{SMD5}"),            chk_smd5, hash_smd5 },
 164         { BER_BVC("{MD5}"),                     chk_md5, hash_md5 },
 165
 166 #ifdef SLAPD_LMHASH
 167         { BER_BVC("{LANMAN}"),          chk_lanman, hash_lanman },
 168 #endif /* SLAPD_LMHASH */
 169
 170 #ifdef SLAPD_CRYPT
 171         { BER_BVC("{CRYPT}"),           chk_crypt, hash_crypt },
 172 # if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD )
 173         { BER_BVC("{UNIX}"),            chk_unix, NULL },
 174 # endif
 175 #endif
 176
 177 #ifdef SLAPD_CLEARTEXT
 178         /* pseudo scheme */
 179         { BER_BVC("{CLEARTEXT}"),       NULL, hash_clear },
 180 #endif
 181
 182         { BER_BVNULL, NULL, NULL }
 183 };
 184
 185 int lutil_passwd_add(
 186         struct berval *scheme,
 187         LUTIL_PASSWD_CHK_FUNC *chk,
 188         LUTIL_PASSWD_HASH_FUNC *hash )
 189 {
 190         struct pw_slist *ptr;
 191
 192         if (!pw_inited) lutil_passwd_init();
 193
 194         ptr = ber_memalloc( sizeof( struct pw_slist ));
 195         if (!ptr) return -1;
 196         ptr->next = pw_schemes;
 197         ptr->s.name = *scheme;
 198         ptr->s.chk_fn = chk;
 199         ptr->s.hash_fn = hash;
 200         pw_schemes = ptr;
 201         return 0;
 202 }
 203
 204 void lutil_passwd_init()
 205 {
 206         struct pw_scheme *s;
 207
 208         pw_inited = 1;
 209
 210         for( s=(struct pw_scheme *)pw_schemes_default; s->name.bv_val; s++) {
 211                 if ( lutil_passwd_add( &s->name, s->chk_fn, s->hash_fn ) ) break;
 212         }
 213 }
 214
 215 void lutil_passwd_destroy()
 216 {
 217         struct pw_slist *ptr, *next;
 218
 219         for( ptr=pw_schemes; ptr; ptr=next ) {
 220                 next = ptr->next;
 221                 ber_memfree( ptr );
 222         }
 223 }
 224
 225 static const struct pw_scheme *get_scheme(
 226         const char* scheme )
 227 {
 228         struct pw_slist *pws;
 229         struct berval bv;
 230
 231         if (!pw_inited) lutil_passwd_init();
 232
 233         bv.bv_val = strchr( scheme, '}' );
 234         if ( !bv.bv_val )
 235                 return NULL;
 236
 237         bv.bv_len = bv.bv_val - scheme + 1;
 238         bv.bv_val = (char *) scheme;
 239
 240         for( pws=pw_schemes; pws; pws=pws->next ) {
 241                 if ( ber_bvstrcasecmp(&bv, &pws->s.name ) == 0 ) {
 242                         return &(pws->s);
 243                 }
 244         }
 245
 246         return NULL;
 247 }
 248
 249 int lutil_passwd_scheme(
 250         const char* scheme )
 251 {
 252         if( scheme == NULL ) {
 253                 return 0;
 254         }
 255
 256         return get_scheme(scheme) != NULL;
 257 }
 258
 259
 260 static int is_allowed_scheme(
 261         const char* scheme,
 262         const char** schemes )
 263 {
 264         int i;
 265
 266         if( schemes == NULL ) return 1;
 267
 268         for( i=0; schemes[i] != NULL; i++ ) {
 269                 if( strcasecmp( scheme, schemes[i] ) == 0 ) {
 270                         return 1;
 271                 }
 272         }
 273         return 0;
 274 }
 275
 276 static struct berval *passwd_scheme(
 277         const struct pw_scheme *scheme,
 278         const struct berval * passwd,
 279         struct berval *bv,
 280         const char** allowed )
 281 {
 282         if( !is_allowed_scheme( scheme->name.bv_val, allowed ) ) {
 283                 return NULL;
 284         }
 285
 286         if( passwd->bv_len >= scheme->name.bv_len ) {
 287                 if( strncasecmp( passwd->bv_val, scheme->name.bv_val, scheme->name.bv_len ) == 0 ) {
 288                         bv->bv_val = &passwd->bv_val[scheme->name.bv_len];
 289                         bv->bv_len = passwd->bv_len - scheme->name.bv_len;
 290
 291                         return bv;
 292                 }
 293         }
 294
 295         return NULL;
 296 }
 297
 298 /*
 299  * Return 0 if creds are good.
 300  */
 301 int
 302 lutil_passwd(
 303         const struct berval *passwd,    /* stored passwd */
 304         const struct berval *cred,              /* user cred */
 305         const char **schemes,
 306         const char **text )
 307 {
 308         struct pw_slist *pws;
 309
 310         if ( text ) *text = NULL;
 311
 312         if (cred == NULL || cred->bv_len == 0 ||
 313                 passwd == NULL || passwd->bv_len == 0 )
 314         {
 315                 return -1;
 316         }
 317
 318         if (!pw_inited) lutil_passwd_init();
 319
 320         for( pws=pw_schemes; pws; pws=pws->next ) {
 321                 if( pws->s.chk_fn ) {
 322                         struct berval x;
 323                         struct berval *p = passwd_scheme( &(pws->s),
 324                                 passwd, &x, schemes );
 325
 326                         if( p != NULL ) {
 327                                 return (pws->s.chk_fn)( &(pws->s.name), p, cred, text );
 328                         }
 329                 }
 330         }
 331
 332 #ifdef SLAPD_CLEARTEXT
 333         /* Do we think there is a scheme specifier here that we
 334          * didn't recognize? Assume a scheme name is at least 1 character.
 335          */
 336         if (( passwd->bv_val[0] == '{' ) &&
 337                 ( ber_bvchr( passwd, '}' ) > passwd->bv_val+1 ))
 338         {
 339                 return 1;
 340         }
 341         if( is_allowed_scheme("{CLEARTEXT}", schemes ) ) {
 342                 return ( passwd->bv_len == cred->bv_len ) ?
 343                         memcmp( passwd->bv_val, cred->bv_val, passwd->bv_len )
 344                         : 1;
 345         }
 346 #endif
 347         return 1;
 348 }
 349
 350 int lutil_passwd_generate( struct berval *pw, ber_len_t len )
 351 {
 352
 353         if( len < 1 ) return -1;
 354
 355         pw->bv_len = len;
 356         pw->bv_val = ber_memalloc( len + 1 );
 357
 358         if( pw->bv_val == NULL ) {
 359                 return -1;
 360         }
 361
 362         if( lutil_entropy( (unsigned char *) pw->bv_val, pw->bv_len) < 0 ) {
 363                 return -1;
 364         }
 365
 366         for( len = 0; len < pw->bv_len; len++ ) {
 367                 pw->bv_val[len] = crypt64[
 368                         pw->bv_val[len] % (sizeof(crypt64)-1) ];
 369         }
 370
 371         pw->bv_val[len] = '\0';
 372
 373         return 0;
 374 }
 375
 376 int lutil_passwd_hash(
 377         const struct berval * passwd,
 378         const char * method,
 379         struct berval *hash,
 380         const char **text )
 381 {
 382         const struct pw_scheme *sc = get_scheme( method );
 383
 384         hash->bv_val = NULL;
 385         hash->bv_len = 0;
 386
 387         if( sc == NULL ) {
 388                 if( text ) *text = "scheme not recognized";
 389                 return -1;
 390         }
 391
 392         if( ! sc->hash_fn ) {
 393                 if( text ) *text = "scheme provided no hash function";
 394                 return -1;
 395         }
 396
 397         if( text ) *text = NULL;
 398
 399         return (sc->hash_fn)( &sc->name, passwd, hash, text );
 400 }
 401
 402 /* pw_string is only called when SLAPD_LMHASH or SLAPD_CRYPT is defined */
 403 #if defined(SLAPD_LMHASH) || defined(SLAPD_CRYPT)
 404 static int pw_string(
 405         const struct berval *sc,
 406         struct berval *passwd )
 407 {
 408         struct berval pw;
 409
 410         pw.bv_len = sc->bv_len + passwd->bv_len;
 411         pw.bv_val = ber_memalloc( pw.bv_len + 1 );
 412
 413         if( pw.bv_val == NULL ) {
 414                 return LUTIL_PASSWD_ERR;
 415         }
 416
 417         AC_MEMCPY( pw.bv_val, sc->bv_val, sc->bv_len );
 418         AC_MEMCPY( &pw.bv_val[sc->bv_len], passwd->bv_val, passwd->bv_len );
 419
 420         pw.bv_val[pw.bv_len] = '\0';
 421         *passwd = pw;
 422
 423         return LUTIL_PASSWD_OK;
 424 }
 425 #endif /* SLAPD_LMHASH || SLAPD_CRYPT */
 426
 427 int lutil_passwd_string64(
 428         const struct berval *sc,
 429         const struct berval *hash,
 430         struct berval *b64,
 431         const struct berval *salt )
 432 {
 433         int rc;
 434         struct berval string;
 435         size_t b64len;
 436
 437         if( salt ) {
 438                 /* need to base64 combined string */
 439                 string.bv_len = hash->bv_len + salt->bv_len;
 440                 string.bv_val = ber_memalloc( string.bv_len + 1 );
 441
 442                 if( string.bv_val == NULL ) {
 443                         return LUTIL_PASSWD_ERR;
 444                 }
 445
 446                 AC_MEMCPY( string.bv_val, hash->bv_val,
 447                         hash->bv_len );
 448                 AC_MEMCPY( &string.bv_val[hash->bv_len], salt->bv_val,
 449                         salt->bv_len );
 450                 string.bv_val[string.bv_len] = '\0';
 451
 452         } else {
 453                 string = *hash;
 454         }
 455
 456         b64len = LUTIL_BASE64_ENCODE_LEN( string.bv_len ) + 1;
 457         b64->bv_len = b64len + sc->bv_len;
 458         b64->bv_val = ber_memalloc( b64->bv_len + 1 );
 459
 460         if( b64->bv_val == NULL ) {
 461                 if( salt ) ber_memfree( string.bv_val );
 462                 return LUTIL_PASSWD_ERR;
 463         }
 464
 465         AC_MEMCPY(b64->bv_val, sc->bv_val, sc->bv_len);
 466
 467         rc = lutil_b64_ntop(
 468                 (unsigned char *) string.bv_val, string.bv_len,
 469                 &b64->bv_val[sc->bv_len], b64len );
 470
 471         if( salt ) ber_memfree( string.bv_val );
 472
 473         if( rc < 0 ) {
 474                 return LUTIL_PASSWD_ERR;
 475         }
 476
 477         /* recompute length */
 478         b64->bv_len = sc->bv_len + rc;
 479         assert( strlen(b64->bv_val) == b64->bv_len );
 480         return LUTIL_PASSWD_OK;
 481 }
 482
 483 /* PASSWORD CHECK ROUTINES */
 484
 485 #ifdef LUTIL_SHA1_BYTES
 486 static int chk_ssha1(
 487         const struct berval *sc,
 488         const struct berval * passwd,
 489         const struct berval * cred,
 490         const char **text )
 491 {
 492         lutil_SHA1_CTX SHA1context;
 493         unsigned char SHA1digest[LUTIL_SHA1_BYTES];
 494         int rc;
 495         unsigned char *orig_pass = NULL;
 496         size_t decode_len = LUTIL_BASE64_DECODE_LEN(passwd->bv_len);
 497
 498         /* safety check -- must have some salt */
 499         if (decode_len <= sizeof(SHA1digest)) {
 500                 return LUTIL_PASSWD_ERR;
 501         }
 502
 503         /* decode base64 password */
 504         orig_pass = (unsigned char *) ber_memalloc(decode_len + 1);
 505
 506         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 507
 508         rc = lutil_b64_pton(passwd->bv_val, orig_pass, decode_len);
 509
 510         /* safety check -- must have some salt */
 511         if (rc <= (int)(sizeof(SHA1digest))) {
 512                 ber_memfree(orig_pass);
 513                 return LUTIL_PASSWD_ERR;
 514         }
 515
 516         /* hash credentials with salt */
 517         lutil_SHA1Init(&SHA1context);
 518         lutil_SHA1Update(&SHA1context,
 519                 (const unsigned char *) cred->bv_val, cred->bv_len);
 520         lutil_SHA1Update(&SHA1context,
 521                 (const unsigned char *) &orig_pass[sizeof(SHA1digest)],
 522                 rc - sizeof(SHA1digest));
 523         lutil_SHA1Final(SHA1digest, &SHA1context);
 524
 525         /* compare */
 526         rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
 527         ber_memfree(orig_pass);
 528         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 529 }
 530
 531 static int chk_sha1(
 532         const struct berval *sc,
 533         const struct berval * passwd,
 534         const struct berval * cred,
 535         const char **text )
 536 {
 537         lutil_SHA1_CTX SHA1context;
 538         unsigned char SHA1digest[LUTIL_SHA1_BYTES];
 539         int rc;
 540         unsigned char *orig_pass = NULL;
 541         size_t decode_len = LUTIL_BASE64_DECODE_LEN(passwd->bv_len);
 542
 543         /* safety check */
 544         if (decode_len < sizeof(SHA1digest)) {
 545                 return LUTIL_PASSWD_ERR;
 546         }
 547
 548         /* base64 un-encode password */
 549         orig_pass = (unsigned char *) ber_memalloc(decode_len + 1);
 550
 551         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 552
 553         rc = lutil_b64_pton(passwd->bv_val, orig_pass, decode_len);
 554
 555         if( rc != sizeof(SHA1digest) ) {
 556                 ber_memfree(orig_pass);
 557                 return LUTIL_PASSWD_ERR;
 558         }
 559
 560         /* hash credentials with salt */
 561         lutil_SHA1Init(&SHA1context);
 562         lutil_SHA1Update(&SHA1context,
 563                 (const unsigned char *) cred->bv_val, cred->bv_len);
 564         lutil_SHA1Final(SHA1digest, &SHA1context);
 565
 566         /* compare */
 567         rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
 568         ber_memfree(orig_pass);
 569         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 570 }
 571 #endif
 572
 573 static int chk_smd5(
 574         const struct berval *sc,
 575         const struct berval * passwd,
 576         const struct berval * cred,
 577         const char **text )
 578 {
 579         lutil_MD5_CTX MD5context;
 580         unsigned char MD5digest[LUTIL_MD5_BYTES];
 581         int rc;
 582         unsigned char *orig_pass = NULL;
 583         size_t decode_len = LUTIL_BASE64_DECODE_LEN(passwd->bv_len);
 584
 585         /* safety check */
 586         if (decode_len <= sizeof(MD5digest)) {
 587                 return LUTIL_PASSWD_ERR;
 588         }
 589
 590         /* base64 un-encode password */
 591         orig_pass = (unsigned char *) ber_memalloc(decode_len + 1);
 592
 593         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 594
 595         rc = lutil_b64_pton(passwd->bv_val, orig_pass, decode_len);
 596
 597         if (rc <= (int)(sizeof(MD5digest))) {
 598                 ber_memfree(orig_pass);
 599                 return LUTIL_PASSWD_ERR;
 600         }
 601
 602         /* hash credentials with salt */
 603         lutil_MD5Init(&MD5context);
 604         lutil_MD5Update(&MD5context,
 605                 (const unsigned char *) cred->bv_val,
 606                 cred->bv_len );
 607         lutil_MD5Update(&MD5context,
 608                 &orig_pass[sizeof(MD5digest)],
 609                 rc - sizeof(MD5digest));
 610         lutil_MD5Final(MD5digest, &MD5context);
 611
 612         /* compare */
 613         rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
 614         ber_memfree(orig_pass);
 615         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 616 }
 617
 618 static int chk_md5(
 619         const struct berval *sc,
 620         const struct berval * passwd,
 621         const struct berval * cred,
 622         const char **text )
 623 {
 624         lutil_MD5_CTX MD5context;
 625         unsigned char MD5digest[LUTIL_MD5_BYTES];
 626         int rc;
 627         unsigned char *orig_pass = NULL;
 628         size_t decode_len = LUTIL_BASE64_DECODE_LEN(passwd->bv_len);
 629
 630         /* safety check */
 631         if (decode_len < sizeof(MD5digest)) {
 632                 return LUTIL_PASSWD_ERR;
 633         }
 634
 635         /* base64 un-encode password */
 636         orig_pass = (unsigned char *) ber_memalloc(decode_len + 1);
 637
 638         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 639
 640         rc = lutil_b64_pton(passwd->bv_val, orig_pass, decode_len);
 641         if ( rc != sizeof(MD5digest) ) {
 642                 ber_memfree(orig_pass);
 643                 return LUTIL_PASSWD_ERR;
 644         }
 645
 646         /* hash credentials with salt */
 647         lutil_MD5Init(&MD5context);
 648         lutil_MD5Update(&MD5context,
 649                 (const unsigned char *) cred->bv_val,
 650                 cred->bv_len );
 651         lutil_MD5Final(MD5digest, &MD5context);
 652
 653         /* compare */
 654         rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
 655         ber_memfree(orig_pass);
 656         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 657 }
 658
 659 #ifdef SLAPD_LMHASH
 660
 661 #if defined(HAVE_OPENSSL)
 662
 663 /*
 664  * abstract away setting the parity.
 665  */
 666 static void
 667 des_set_key_and_parity( des_key *key, unsigned char *keyData)
 668 {
 669     memcpy(key, keyData, 8);
 670     DES_set_odd_parity( key );
 671 }
 672
 673
 674 #elif defined(HAVE_MOZNSS)
 675
 676 /*
 677  * implement MozNSS wrappers for the openSSL calls
 678  */
 679 static void
 680 des_set_key_and_parity( des_key *key, unsigned char *keyData)
 681 {
 682     SECItem keyDataItem;
 683     PK11SlotInfo *slot;
 684     *key = NULL;
 685
 686     keyDataItem.data = keyData;
 687     keyDataItem.len = 8;
 688
 689     slot = PK11_GetBestSlot(CKM_DES_ECB, NULL);
 690     if (slot == NULL) {
 691         return;
 692     }
 693
 694     /* NOTE: this will not work in FIPS mode. In order to make lmhash
 695      * work in fips mode we need to define a LMHASH pbe mechanism and
 696      * do the fulll key derivation inside the token */
 697     *key = PK11_ImportSymKey(slot, CKM_DES_ECB, PK11_OriginGenerated,
 698                 CKA_ENCRYPT, &keyDataItem, NULL);
 699 }
 700
 701 static void
 702 DES_set_key_unchecked( des_key *key, des_context ctxt )
 703 {
 704     ctxt[0] = NULL;
 705
 706     /* handle error conditions from previous call */
 707     if (!*key) {
 708         return;
 709     }
 710
 711     ctxt[0] = PK11_CreateContextBySymKey(CKM_DES_ECB, CKA_ENCRYPT, *key, NULL);
 712 }
 713
 714 static void
 715 DES_ecb_encrypt( des_data_block *plain, des_data_block *encrypted,
 716                         des_context ctxt, int op)
 717 {
 718     SECStatus rv;
 719     int size;
 720
 721     if (ctxt[0] == NULL) {
 722         /* need to fail here...  */
 723         memset(encrypted, 0, sizeof(des_data_block));
 724         return;
 725     }
 726     rv = PK11_CipherOp(ctxt[0], (unsigned char *)&encrypted[0],
 727                         &size, sizeof(des_data_block),
 728                         (unsigned char *)&plain[0], sizeof(des_data_block));
 729     if (rv != SECSuccess) {
 730         /* signal failure */
 731         memset(encrypted, 0, sizeof(des_data_block));
 732         return;
 733     }
 734     return;
 735 }
 736
 737 static int
 738 des_failed(des_data_block *encrypted)
 739 {
 740    static const des_data_block zero = { 0 };
 741    return memcmp(encrypted, zero, sizeof(zero)) == 0;
 742 }
 743
 744 static void
 745 des_finish(des_key *key, des_context ctxt)
 746 {
 747      if (*key) {
 748         PK11_FreeSymKey(*key);
 749         *key = NULL;
 750      }
 751      if (ctxt[0]) {
 752         PK11_Finalize(ctxt[0]);
 753         PK11_DestroyContext(ctxt[0], PR_TRUE);
 754         ctxt[0] = NULL;
 755      }
 756 }
 757
 758 #endif
 759
 760 /* pseudocode from RFC2433
 761  * A.2 LmPasswordHash()
 762  *
 763  *    LmPasswordHash(
 764  *    IN  0-to-14-oem-char Password,
 765  *    OUT 16-octet         PasswordHash )
 766  *    {
 767  *       Set UcasePassword to the uppercased Password
 768  *       Zero pad UcasePassword to 14 characters
 769  *
 770  *       DesHash( 1st 7-octets of UcasePassword,
 771  *                giving 1st 8-octets of PasswordHash )
 772  *
 773  *       DesHash( 2nd 7-octets of UcasePassword,
 774  *                giving 2nd 8-octets of PasswordHash )
 775  *    }
 776  *
 777  *
 778  * A.3 DesHash()
 779  *
 780  *    DesHash(
 781  *    IN  7-octet Clear,
 782  *    OUT 8-octet Cypher )
 783  *    {
 784  *        *
 785  *        * Make Cypher an irreversibly encrypted form of Clear by
 786  *        * encrypting known text using Clear as the secret key.
 787  *        * The known text consists of the string
 788  *        *
 789  *        *              KGS!@#$%
 790  *        *
 791  *
 792  *       Set StdText to "KGS!@#$%"
 793  *       DesEncrypt( StdText, Clear, giving Cypher )
 794  *    }
 795  *
 796  *
 797  * A.4 DesEncrypt()
 798  *
 799  *    DesEncrypt(
 800  *    IN  8-octet Clear,
 801  *    IN  7-octet Key,
 802  *    OUT 8-octet Cypher )
 803  *    {
 804  *        *
 805  *        * Use the DES encryption algorithm [4] in ECB mode [9]
 806  *        * to encrypt Clear into Cypher such that Cypher can
 807  *        * only be decrypted back to Clear by providing Key.
 808  *        * Note that the DES algorithm takes as input a 64-bit
 809  *        * stream where the 8th, 16th, 24th, etc.  bits are
 810  *        * parity bits ignored by the encrypting algorithm.
 811  *        * Unless you write your own DES to accept 56-bit input
 812  *        * without parity, you will need to insert the parity bits
 813  *        * yourself.
 814  *        *
 815  *    }
 816  */
 817
 818 static void lmPasswd_to_key(
 819         const char *lmPasswd,
 820         des_key *key)
 821 {
 822         const unsigned char *lpw = (const unsigned char *) lmPasswd;
 823         unsigned char k[8];
 824
 825         /* make room for parity bits */
 826         k[0] = lpw[0];
 827         k[1] = ((lpw[0] & 0x01) << 7) | (lpw[1] >> 1);
 828         k[2] = ((lpw[1] & 0x03) << 6) | (lpw[2] >> 2);
 829         k[3] = ((lpw[2] & 0x07) << 5) | (lpw[3] >> 3);
 830         k[4] = ((lpw[3] & 0x0F) << 4) | (lpw[4] >> 4);
 831         k[5] = ((lpw[4] & 0x1F) << 3) | (lpw[5] >> 5);
 832         k[6] = ((lpw[5] & 0x3F) << 2) | (lpw[6] >> 6);
 833         k[7] = ((lpw[6] & 0x7F) << 1);
 834
 835         des_set_key_and_parity( key, k );
 836 }
 837
 838 static int chk_lanman(
 839         const struct berval *scheme,
 840         const struct berval *passwd,
 841         const struct berval *cred,
 842         const char **text )
 843 {
 844         ber_len_t i;
 845         char UcasePassword[15];
 846         des_key key;
 847         des_context schedule;
 848         des_data_block StdText = "KGS!@#$%";
 849         des_data_block PasswordHash1, PasswordHash2;
 850         char PasswordHash[33], storedPasswordHash[33];
 851
 852         for( i=0; i<cred->bv_len; i++) {
 853                 if(cred->bv_val[i] == '\0') {
 854                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 855                 }
 856         }
 857
 858         if( cred->bv_val[i] != '\0' ) {
 859                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 860         }
 861
 862         strncpy( UcasePassword, cred->bv_val, 14 );
 863         UcasePassword[14] = '\0';
 864         ldap_pvt_str2upper( UcasePassword );
 865
 866         lmPasswd_to_key( UcasePassword, &key );
 867         DES_set_key_unchecked( &key, schedule );
 868         DES_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT );
 869
 870         if (des_failed(&PasswordHash1)) {
 871             return LUTIL_PASSWD_ERR;
 872         }
 873
 874         lmPasswd_to_key( &UcasePassword[7], &key );
 875         DES_set_key_unchecked( &key, schedule );
 876         DES_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT );
 877         if (des_failed(&PasswordHash2)) {
 878             return LUTIL_PASSWD_ERR;
 879         }
 880
 881         des_finish( &key, schedule );
 882
 883         sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 884                 PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3],
 885                 PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7],
 886                 PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3],
 887                 PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] );
 888
 889         /* as a precaution convert stored password hash to lower case */
 890         strncpy( storedPasswordHash, passwd->bv_val, 32 );
 891         storedPasswordHash[32] = '\0';
 892         ldap_pvt_str2lower( storedPasswordHash );
 893
 894         return memcmp( PasswordHash, storedPasswordHash, 32) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 895 }
 896 #endif /* SLAPD_LMHASH */
 897
 898 #ifdef SLAPD_CRYPT
 899 static int lutil_crypt(
 900         const char *key,
 901         const char *salt,
 902         char **hash )
 903 {
 904         char *cr = crypt( key, salt );
 905         int rc;
 906
 907         if( cr == NULL || cr[0] == '\0' ) {
 908                 /* salt must have been invalid */
 909                 rc = LUTIL_PASSWD_ERR;
 910         } else {
 911                 if ( hash ) {
 912                         *hash = ber_strdup( cr );
 913                         rc = LUTIL_PASSWD_OK;
 914                 } else {
 915                         rc = strcmp( salt, cr ) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 916                 }
 917         }
 918         return rc;
 919 }
 920
 921 static int chk_crypt(
 922         const struct berval *sc,
 923         const struct berval * passwd,
 924         const struct berval * cred,
 925         const char **text )
 926 {
 927         unsigned int i;
 928
 929         for( i=0; i<cred->bv_len; i++) {
 930                 if(cred->bv_val[i] == '\0') {
 931                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 932                 }
 933         }
 934
 935         if( cred->bv_val[i] != '\0' ) {
 936                 return LUTIL_PASSWD_ERR;        /* cred must behave like a string */
 937         }
 938
 939         if( passwd->bv_len < 2 ) {
 940                 return LUTIL_PASSWD_ERR;        /* passwd must be at least two characters long */
 941         }
 942
 943         for( i=0; i<passwd->bv_len; i++) {
 944                 if(passwd->bv_val[i] == '\0') {
 945                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 946                 }
 947         }
 948
 949         if( passwd->bv_val[i] != '\0' ) {
 950                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 951         }
 952
 953         return lutil_cryptptr( cred->bv_val, passwd->bv_val, NULL );
 954 }
 955
 956 # if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD )
 957 static int chk_unix(
 958         const struct berval *sc,
 959         const struct berval * passwd,
 960         const struct berval * cred,
 961         const char **text )
 962 {
 963         unsigned int i;
 964         char *pw;
 965
 966         for( i=0; i<cred->bv_len; i++) {
 967                 if(cred->bv_val[i] == '\0') {
 968                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 969                 }
 970         }
 971         if( cred->bv_val[i] != '\0' ) {
 972                 return LUTIL_PASSWD_ERR;        /* cred must behave like a string */
 973         }
 974
 975         for( i=0; i<passwd->bv_len; i++) {
 976                 if(passwd->bv_val[i] == '\0') {
 977                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 978                 }
 979         }
 980
 981         if( passwd->bv_val[i] != '\0' ) {
 982                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 983         }
 984
 985         {
 986                 struct passwd *pwd = getpwnam(passwd->bv_val);
 987
 988                 if(pwd == NULL) {
 989                         return LUTIL_PASSWD_ERR;        /* not found */
 990                 }
 991
 992                 pw = pwd->pw_passwd;
 993         }
 994 #  ifdef HAVE_GETSPNAM
 995         {
 996                 struct spwd *spwd = getspnam(passwd->bv_val);
 997
 998                 if(spwd != NULL) {
 999                         pw = spwd->sp_pwdp;
1000                 }
1001         }
1002 #  endif
1003 #  ifdef HAVE_AIX_SECURITY
1004         {
1005                 struct userpw *upw = getuserpw(passwd->bv_val);
1006
1007                 if (upw != NULL) {
1008                         pw = upw->upw_passwd;
1009                 }
1010         }
1011 #  endif
1012
1013         if( pw == NULL || pw[0] == '\0' || pw[1] == '\0' ) {
1014                 /* password must must be at least two characters long */
1015                 return LUTIL_PASSWD_ERR;
1016         }
1017
1018         return lutil_cryptptr( cred->bv_val, pw, NULL );
1019 }
1020 # endif
1021 #endif
1022
1023 /* PASSWORD GENERATION ROUTINES */
1024
1025 #ifdef LUTIL_SHA1_BYTES
1026 static int hash_ssha1(
1027         const struct berval *scheme,
1028         const struct berval  *passwd,
1029         struct berval *hash,
1030         const char **text )
1031 {
1032         lutil_SHA1_CTX  SHA1context;
1033         unsigned char   SHA1digest[LUTIL_SHA1_BYTES];
1034         char            saltdata[SALT_SIZE];
1035         struct berval digest;
1036         struct berval salt;
1037
1038         digest.bv_val = (char *) SHA1digest;
1039         digest.bv_len = sizeof(SHA1digest);
1040         salt.bv_val = saltdata;
1041         salt.bv_len = sizeof(saltdata);
1042
1043         if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) {
1044                 return LUTIL_PASSWD_ERR;
1045         }
1046
1047         lutil_SHA1Init( &SHA1context );
1048         lutil_SHA1Update( &SHA1context,
1049                 (const unsigned char *)passwd->bv_val, passwd->bv_len );
1050         lutil_SHA1Update( &SHA1context,
1051                 (const unsigned char *)salt.bv_val, salt.bv_len );
1052         lutil_SHA1Final( SHA1digest, &SHA1context );
1053
1054         return lutil_passwd_string64( scheme, &digest, hash, &salt);
1055 }
1056
1057 static int hash_sha1(
1058         const struct berval *scheme,
1059         const struct berval  *passwd,
1060         struct berval *hash,
1061         const char **text )
1062 {
1063         lutil_SHA1_CTX  SHA1context;
1064         unsigned char   SHA1digest[LUTIL_SHA1_BYTES];
1065         struct berval digest;
1066         digest.bv_val = (char *) SHA1digest;
1067         digest.bv_len = sizeof(SHA1digest);
1068
1069         lutil_SHA1Init( &SHA1context );
1070         lutil_SHA1Update( &SHA1context,
1071                 (const unsigned char *)passwd->bv_val, passwd->bv_len );
1072         lutil_SHA1Final( SHA1digest, &SHA1context );
1073
1074         return lutil_passwd_string64( scheme, &digest, hash, NULL);
1075 }
1076 #endif
1077
1078 static int hash_smd5(
1079         const struct berval *scheme,
1080         const struct berval  *passwd,
1081         struct berval *hash,
1082         const char **text )
1083 {
1084         lutil_MD5_CTX   MD5context;
1085         unsigned char   MD5digest[LUTIL_MD5_BYTES];
1086         char            saltdata[SALT_SIZE];
1087         struct berval digest;
1088         struct berval salt;
1089
1090         digest.bv_val = (char *) MD5digest;
1091         digest.bv_len = sizeof(MD5digest);
1092         salt.bv_val = saltdata;
1093         salt.bv_len = sizeof(saltdata);
1094
1095         if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) {
1096                 return LUTIL_PASSWD_ERR;
1097         }
1098
1099         lutil_MD5Init( &MD5context );
1100         lutil_MD5Update( &MD5context,
1101                 (const unsigned char *) passwd->bv_val, passwd->bv_len );
1102         lutil_MD5Update( &MD5context,
1103                 (const unsigned char *) salt.bv_val, salt.bv_len );
1104         lutil_MD5Final( MD5digest, &MD5context );
1105
1106         return lutil_passwd_string64( scheme, &digest, hash, &salt );
1107 }
1108
1109 static int hash_md5(
1110         const struct berval *scheme,
1111         const struct berval  *passwd,
1112         struct berval *hash,
1113         const char **text )
1114 {
1115         lutil_MD5_CTX   MD5context;
1116         unsigned char   MD5digest[LUTIL_MD5_BYTES];
1117
1118         struct berval digest;
1119
1120         digest.bv_val = (char *) MD5digest;
1121         digest.bv_len = sizeof(MD5digest);
1122
1123         lutil_MD5Init( &MD5context );
1124         lutil_MD5Update( &MD5context,
1125                 (const unsigned char *) passwd->bv_val, passwd->bv_len );
1126         lutil_MD5Final( MD5digest, &MD5context );
1127
1128         return lutil_passwd_string64( scheme, &digest, hash, NULL );
1129 ;
1130 }
1131
1132 #ifdef SLAPD_LMHASH
1133 static int hash_lanman(
1134         const struct berval *scheme,
1135         const struct berval *passwd,
1136         struct berval *hash,
1137         const char **text )
1138 {
1139
1140         ber_len_t i;
1141         char UcasePassword[15];
1142         des_key key;
1143         des_context schedule;
1144         des_data_block StdText = "KGS!@#$%";
1145         des_data_block PasswordHash1, PasswordHash2;
1146         char PasswordHash[33];
1147
1148         for( i=0; i<passwd->bv_len; i++) {
1149                 if(passwd->bv_val[i] == '\0') {
1150                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
1151                 }
1152         }
1153
1154         if( passwd->bv_val[i] != '\0' ) {
1155                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
1156         }
1157
1158         strncpy( UcasePassword, passwd->bv_val, 14 );
1159         UcasePassword[14] = '\0';
1160         ldap_pvt_str2upper( UcasePassword );
1161
1162         lmPasswd_to_key( UcasePassword, &key );
1163         DES_set_key_unchecked( &key, schedule );
1164         DES_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT );
1165
1166         lmPasswd_to_key( &UcasePassword[7], &key );
1167         DES_set_key_unchecked( &key, schedule );
1168         DES_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT );
1169
1170         sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
1171                 PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3],
1172                 PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7],
1173                 PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3],
1174                 PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] );
1175
1176         hash->bv_val = PasswordHash;
1177         hash->bv_len = 32;
1178
1179         return pw_string( scheme, hash );
1180 }
1181 #endif /* SLAPD_LMHASH */
1182
1183 #ifdef SLAPD_CRYPT
1184 static int hash_crypt(
1185         const struct berval *scheme,
1186         const struct berval *passwd,
1187         struct berval *hash,
1188         const char **text )
1189 {
1190         unsigned char salt[32]; /* salt suitable for most anything */
1191         unsigned int i;
1192         char *save;
1193         int rc;
1194
1195         for( i=0; i<passwd->bv_len; i++) {
1196                 if(passwd->bv_val[i] == '\0') {
1197                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
1198                 }
1199         }
1200
1201         if( passwd->bv_val[i] != '\0' ) {
1202                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
1203         }
1204
1205         if( lutil_entropy( salt, sizeof( salt ) ) < 0 ) {
1206                 return LUTIL_PASSWD_ERR;
1207         }
1208
1209         for( i=0; i< ( sizeof(salt) - 1 ); i++ ) {
1210                 salt[i] = crypt64[ salt[i] % (sizeof(crypt64)-1) ];
1211         }
1212         salt[sizeof( salt ) - 1 ] = '\0';
1213
1214         if( salt_format != NULL ) {
1215                 /* copy the salt we made into entropy before snprintfing
1216                    it back into the salt */
1217                 char entropy[sizeof(salt)];
1218                 strcpy( entropy, (char *) salt );
1219                 snprintf( (char *) salt, sizeof(entropy), salt_format, entropy );
1220         }
1221
1222         rc = lutil_cryptptr( passwd->bv_val, (char *) salt, &hash->bv_val );
1223         if ( rc != LUTIL_PASSWD_OK ) return rc;
1224
1225         if( hash->bv_val == NULL ) return -1;
1226
1227         hash->bv_len = strlen( hash->bv_val );
1228
1229         save = hash->bv_val;
1230
1231         if( hash->bv_len == 0 ) {
1232                 rc = LUTIL_PASSWD_ERR;
1233         } else {
1234                 rc = pw_string( scheme, hash );
1235         }
1236         ber_memfree( save );
1237         return rc;
1238 }
1239 #endif
1240
1241 int lutil_salt_format(const char *format)
1242 {
1243 #ifdef SLAPD_CRYPT
1244         ber_memfree( salt_format );
1245
1246         salt_format = format != NULL ? ber_strdup( format ) : NULL;
1247 #endif
1248
1249         return 0;
1250 }
1251
1252 #ifdef SLAPD_CLEARTEXT
1253 static int hash_clear(
1254         const struct berval *scheme,
1255         const struct berval  *passwd,
1256         struct berval *hash,
1257         const char **text )
1258 {
1259         ber_dupbv( hash, (struct berval *)passwd );
1260         return LUTIL_PASSWD_OK;
1261 }
1262 #endif
1263