crypto/pkcs7/pk7_lib.c

   1 /* crypto/pkcs7/pk7_lib.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include "cryptlib.h"
  61 #include <openssl/objects.h>
  62 #include <openssl/x509.h>
  63
  64 long PKCS7_ctrl(PKCS7 *p7, int cmd, long larg, char *parg)
  65 {
  66     int nid;
  67     long ret;
  68
  69     nid = OBJ_obj2nid(p7->type);
  70
  71     switch (cmd) {
  72     case PKCS7_OP_SET_DETACHED_SIGNATURE:
  73         if (nid == NID_pkcs7_signed) {
  74             ret = p7->detached = (int)larg;
  75             if (ret && PKCS7_type_is_data(p7->d.sign->contents)) {
  76                 ASN1_OCTET_STRING *os;
  77                 os = p7->d.sign->contents->d.data;
  78                 ASN1_OCTET_STRING_free(os);
  79                 p7->d.sign->contents->d.data = NULL;
  80             }
  81         } else {
  82             PKCS7err(PKCS7_F_PKCS7_CTRL,
  83                      PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
  84             ret = 0;
  85         }
  86         break;
  87     case PKCS7_OP_GET_DETACHED_SIGNATURE:
  88         if (nid == NID_pkcs7_signed) {
  89             if (!p7->d.sign || !p7->d.sign->contents->d.ptr)
  90                 ret = 1;
  91             else
  92                 ret = 0;
  93
  94             p7->detached = ret;
  95         } else {
  96             PKCS7err(PKCS7_F_PKCS7_CTRL,
  97                      PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
  98             ret = 0;
  99         }
 100
 101         break;
 102     default:
 103         PKCS7err(PKCS7_F_PKCS7_CTRL, PKCS7_R_UNKNOWN_OPERATION);
 104         ret = 0;
 105     }
 106     return (ret);
 107 }
 108
 109 int PKCS7_content_new(PKCS7 *p7, int type)
 110 {
 111     PKCS7 *ret = NULL;
 112
 113     if ((ret = PKCS7_new()) == NULL)
 114         goto err;
 115     if (!PKCS7_set_type(ret, type))
 116         goto err;
 117     if (!PKCS7_set_content(p7, ret))
 118         goto err;
 119
 120     return (1);
 121  err:
 122     if (ret != NULL)
 123         PKCS7_free(ret);
 124     return (0);
 125 }
 126
 127 int PKCS7_set_content(PKCS7 *p7, PKCS7 *p7_data)
 128 {
 129     int i;
 130
 131     i = OBJ_obj2nid(p7->type);
 132     switch (i) {
 133     case NID_pkcs7_signed:
 134         if (p7->d.sign->contents != NULL)
 135             PKCS7_free(p7->d.sign->contents);
 136         p7->d.sign->contents = p7_data;
 137         break;
 138     case NID_pkcs7_digest:
 139         if (p7->d.digest->contents != NULL)
 140             PKCS7_free(p7->d.digest->contents);
 141         p7->d.digest->contents = p7_data;
 142         break;
 143     case NID_pkcs7_data:
 144     case NID_pkcs7_enveloped:
 145     case NID_pkcs7_signedAndEnveloped:
 146     case NID_pkcs7_encrypted:
 147     default:
 148         PKCS7err(PKCS7_F_PKCS7_SET_CONTENT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 149         goto err;
 150     }
 151     return (1);
 152  err:
 153     return (0);
 154 }
 155
 156 int PKCS7_set_type(PKCS7 *p7, int type)
 157 {
 158     ASN1_OBJECT *obj;
 159
 160     /*
 161      * PKCS7_content_free(p7);
 162      */
 163     obj = OBJ_nid2obj(type);    /* will not fail */
 164
 165     switch (type) {
 166     case NID_pkcs7_signed:
 167         p7->type = obj;
 168         if ((p7->d.sign = PKCS7_SIGNED_new()) == NULL)
 169             goto err;
 170         if (!ASN1_INTEGER_set(p7->d.sign->version, 1)) {
 171             PKCS7_SIGNED_free(p7->d.sign);
 172             p7->d.sign = NULL;
 173             goto err;
 174         }
 175         break;
 176     case NID_pkcs7_data:
 177         p7->type = obj;
 178         if ((p7->d.data = M_ASN1_OCTET_STRING_new()) == NULL)
 179             goto err;
 180         break;
 181     case NID_pkcs7_signedAndEnveloped:
 182         p7->type = obj;
 183         if ((p7->d.signed_and_enveloped = PKCS7_SIGN_ENVELOPE_new())
 184             == NULL)
 185             goto err;
 186         ASN1_INTEGER_set(p7->d.signed_and_enveloped->version, 1);
 187         if (!ASN1_INTEGER_set(p7->d.signed_and_enveloped->version, 1))
 188             goto err;
 189         p7->d.signed_and_enveloped->enc_data->content_type
 190             = OBJ_nid2obj(NID_pkcs7_data);
 191         break;
 192     case NID_pkcs7_enveloped:
 193         p7->type = obj;
 194         if ((p7->d.enveloped = PKCS7_ENVELOPE_new())
 195             == NULL)
 196             goto err;
 197         if (!ASN1_INTEGER_set(p7->d.enveloped->version, 0))
 198             goto err;
 199         p7->d.enveloped->enc_data->content_type = OBJ_nid2obj(NID_pkcs7_data);
 200         break;
 201     case NID_pkcs7_encrypted:
 202         p7->type = obj;
 203         if ((p7->d.encrypted = PKCS7_ENCRYPT_new())
 204             == NULL)
 205             goto err;
 206         if (!ASN1_INTEGER_set(p7->d.encrypted->version, 0))
 207             goto err;
 208         p7->d.encrypted->enc_data->content_type = OBJ_nid2obj(NID_pkcs7_data);
 209         break;
 210
 211     case NID_pkcs7_digest:
 212         p7->type = obj;
 213         if ((p7->d.digest = PKCS7_DIGEST_new())
 214             == NULL)
 215             goto err;
 216         if (!ASN1_INTEGER_set(p7->d.digest->version, 0))
 217             goto err;
 218         break;
 219     default:
 220         PKCS7err(PKCS7_F_PKCS7_SET_TYPE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 221         goto err;
 222     }
 223     return (1);
 224  err:
 225     return (0);
 226 }
 227
 228 int PKCS7_set0_type_other(PKCS7 *p7, int type, ASN1_TYPE *other)
 229 {
 230     p7->type = OBJ_nid2obj(type);
 231     p7->d.other = other;
 232     return 1;
 233 }
 234
 235 int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
 236 {
 237     int i, j, nid;
 238     X509_ALGOR *alg;
 239     STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
 240     STACK_OF(X509_ALGOR) *md_sk;
 241
 242     i = OBJ_obj2nid(p7->type);
 243     switch (i) {
 244     case NID_pkcs7_signed:
 245         signer_sk = p7->d.sign->signer_info;
 246         md_sk = p7->d.sign->md_algs;
 247         break;
 248     case NID_pkcs7_signedAndEnveloped:
 249         signer_sk = p7->d.signed_and_enveloped->signer_info;
 250         md_sk = p7->d.signed_and_enveloped->md_algs;
 251         break;
 252     default:
 253         PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER, PKCS7_R_WRONG_CONTENT_TYPE);
 254         return (0);
 255     }
 256
 257     nid = OBJ_obj2nid(psi->digest_alg->algorithm);
 258
 259     /* If the digest is not currently listed, add it */
 260     j = 0;
 261     for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
 262         alg = sk_X509_ALGOR_value(md_sk, i);
 263         if (OBJ_obj2nid(alg->algorithm) == nid) {
 264             j = 1;
 265             break;
 266         }
 267     }
 268     if (!j) {                   /* we need to add another algorithm */
 269         if (!(alg = X509_ALGOR_new())
 270             || !(alg->parameter = ASN1_TYPE_new())) {
 271             X509_ALGOR_free(alg);
 272             PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER, ERR_R_MALLOC_FAILURE);
 273             return (0);
 274         }
 275         alg->algorithm = OBJ_nid2obj(nid);
 276         alg->parameter->type = V_ASN1_NULL;
 277         if (!sk_X509_ALGOR_push(md_sk, alg)) {
 278             X509_ALGOR_free(alg);
 279             return 0;
 280         }
 281     }
 282
 283     if (!sk_PKCS7_SIGNER_INFO_push(signer_sk, psi))
 284         return 0;
 285     return (1);
 286 }
 287
 288 int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
 289 {
 290     int i;
 291     STACK_OF(X509) **sk;
 292
 293     i = OBJ_obj2nid(p7->type);
 294     switch (i) {
 295     case NID_pkcs7_signed:
 296         sk = &(p7->d.sign->cert);
 297         break;
 298     case NID_pkcs7_signedAndEnveloped:
 299         sk = &(p7->d.signed_and_enveloped->cert);
 300         break;
 301     default:
 302         PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE, PKCS7_R_WRONG_CONTENT_TYPE);
 303         return (0);
 304     }
 305
 306     if (*sk == NULL)
 307         *sk = sk_X509_new_null();
 308     if (*sk == NULL) {
 309         PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE, ERR_R_MALLOC_FAILURE);
 310         return 0;
 311     }
 312     CRYPTO_add(&x509->references, 1, CRYPTO_LOCK_X509);
 313     if (!sk_X509_push(*sk, x509)) {
 314         X509_free(x509);
 315         return 0;
 316     }
 317     return (1);
 318 }
 319
 320 int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
 321 {
 322     int i;
 323     STACK_OF(X509_CRL) **sk;
 324
 325     i = OBJ_obj2nid(p7->type);
 326     switch (i) {
 327     case NID_pkcs7_signed:
 328         sk = &(p7->d.sign->crl);
 329         break;
 330     case NID_pkcs7_signedAndEnveloped:
 331         sk = &(p7->d.signed_and_enveloped->crl);
 332         break;
 333     default:
 334         PKCS7err(PKCS7_F_PKCS7_ADD_CRL, PKCS7_R_WRONG_CONTENT_TYPE);
 335         return (0);
 336     }
 337
 338     if (*sk == NULL)
 339         *sk = sk_X509_CRL_new_null();
 340     if (*sk == NULL) {
 341         PKCS7err(PKCS7_F_PKCS7_ADD_CRL, ERR_R_MALLOC_FAILURE);
 342         return 0;
 343     }
 344
 345     CRYPTO_add(&crl->references, 1, CRYPTO_LOCK_X509_CRL);
 346     if (!sk_X509_CRL_push(*sk, crl)) {
 347         X509_CRL_free(crl);
 348         return 0;
 349     }
 350     return (1);
 351 }
 352
 353 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
 354                           const EVP_MD *dgst)
 355 {
 356     int nid;
 357     char is_dsa;
 358
 359     if (pkey->type == EVP_PKEY_DSA || pkey->type == EVP_PKEY_EC)
 360         is_dsa = 1;
 361     else
 362         is_dsa = 0;
 363     /* We now need to add another PKCS7_SIGNER_INFO entry */
 364     if (!ASN1_INTEGER_set(p7i->version, 1))
 365         goto err;
 366     if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
 367                        X509_get_issuer_name(x509)))
 368         goto err;
 369
 370     /*
 371      * because ASN1_INTEGER_set is used to set a 'long' we will do things the
 372      * ugly way.
 373      */
 374     M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 375     if (!(p7i->issuer_and_serial->serial =
 376           M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
 377         goto err;
 378
 379     /* lets keep the pkey around for a while */
 380     CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
 381     p7i->pkey = pkey;
 382
 383     /* Set the algorithms */
 384     if (is_dsa)
 385         p7i->digest_alg->algorithm = OBJ_nid2obj(NID_sha1);
 386     else
 387         p7i->digest_alg->algorithm = OBJ_nid2obj(EVP_MD_type(dgst));
 388
 389     if (p7i->digest_alg->parameter != NULL)
 390         ASN1_TYPE_free(p7i->digest_alg->parameter);
 391     if ((p7i->digest_alg->parameter = ASN1_TYPE_new()) == NULL)
 392         goto err;
 393     p7i->digest_alg->parameter->type = V_ASN1_NULL;
 394
 395     if (p7i->digest_enc_alg->parameter != NULL)
 396         ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
 397     nid = EVP_PKEY_type(pkey->type);
 398     if (nid == EVP_PKEY_RSA) {
 399         p7i->digest_enc_alg->algorithm = OBJ_nid2obj(NID_rsaEncryption);
 400         if (!(p7i->digest_enc_alg->parameter = ASN1_TYPE_new()))
 401             goto err;
 402         p7i->digest_enc_alg->parameter->type = V_ASN1_NULL;
 403     } else if (nid == EVP_PKEY_DSA) {
 404 #if 1
 405         /*
 406          * use 'dsaEncryption' OID for compatibility with other software
 407          * (PKCS #7 v1.5 does specify how to handle DSA) ...
 408          */
 409         p7i->digest_enc_alg->algorithm = OBJ_nid2obj(NID_dsa);
 410 #else
 411         /*
 412          * ... although the 'dsaWithSHA1' OID (as required by RFC 2630 for
 413          * CMS) would make more sense.
 414          */
 415         p7i->digest_enc_alg->algorithm = OBJ_nid2obj(NID_dsaWithSHA1);
 416 #endif
 417         p7i->digest_enc_alg->parameter = NULL; /* special case for DSA: omit
 418                                                 * 'parameter'! */
 419     } else if (nid == EVP_PKEY_EC) {
 420         p7i->digest_enc_alg->algorithm = OBJ_nid2obj(NID_ecdsa_with_SHA1);
 421         if (!(p7i->digest_enc_alg->parameter = ASN1_TYPE_new()))
 422             goto err;
 423         p7i->digest_enc_alg->parameter->type = V_ASN1_NULL;
 424     } else
 425         return (0);
 426
 427     return (1);
 428  err:
 429     return (0);
 430 }
 431
 432 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
 433                                        const EVP_MD *dgst)
 434 {
 435     PKCS7_SIGNER_INFO *si;
 436
 437     if ((si = PKCS7_SIGNER_INFO_new()) == NULL)
 438         goto err;
 439     if (!PKCS7_SIGNER_INFO_set(si, x509, pkey, dgst))
 440         goto err;
 441     if (!PKCS7_add_signer(p7, si))
 442         goto err;
 443     return (si);
 444  err:
 445     PKCS7_SIGNER_INFO_free(si);
 446     return (NULL);
 447 }
 448
 449 int PKCS7_set_digest(PKCS7 *p7, const EVP_MD *md)
 450 {
 451     if (PKCS7_type_is_digest(p7)) {
 452         if (!(p7->d.digest->md->parameter = ASN1_TYPE_new())) {
 453             PKCS7err(PKCS7_F_PKCS7_SET_DIGEST, ERR_R_MALLOC_FAILURE);
 454             return 0;
 455         }
 456         p7->d.digest->md->parameter->type = V_ASN1_NULL;
 457         p7->d.digest->md->algorithm = OBJ_nid2obj(EVP_MD_nid(md));
 458         return 1;
 459     }
 460
 461     PKCS7err(PKCS7_F_PKCS7_SET_DIGEST, PKCS7_R_WRONG_CONTENT_TYPE);
 462     return 1;
 463 }
 464
 465 STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
 466 {
 467     if (PKCS7_type_is_signed(p7)) {
 468         return (p7->d.sign->signer_info);
 469     } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
 470         return (p7->d.signed_and_enveloped->signer_info);
 471     } else
 472         return (NULL);
 473 }
 474
 475 PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
 476 {
 477     PKCS7_RECIP_INFO *ri;
 478
 479     if ((ri = PKCS7_RECIP_INFO_new()) == NULL)
 480         goto err;
 481     if (!PKCS7_RECIP_INFO_set(ri, x509))
 482         goto err;
 483     if (!PKCS7_add_recipient_info(p7, ri))
 484         goto err;
 485     return (ri);
 486  err:
 487     PKCS7_RECIP_INFO_free(ri);
 488     return (NULL);
 489 }
 490
 491 int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
 492 {
 493     int i;
 494     STACK_OF(PKCS7_RECIP_INFO) *sk;
 495
 496     i = OBJ_obj2nid(p7->type);
 497     switch (i) {
 498     case NID_pkcs7_signedAndEnveloped:
 499         sk = p7->d.signed_and_enveloped->recipientinfo;
 500         break;
 501     case NID_pkcs7_enveloped:
 502         sk = p7->d.enveloped->recipientinfo;
 503         break;
 504     default:
 505         PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,
 506                  PKCS7_R_WRONG_CONTENT_TYPE);
 507         return (0);
 508     }
 509
 510     if (!sk_PKCS7_RECIP_INFO_push(sk, ri))
 511         return 0;
 512     return (1);
 513 }
 514
 515 int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
 516 {
 517     if (!ASN1_INTEGER_set(p7i->version, 0))
 518         return 0;
 519     if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
 520                        X509_get_issuer_name(x509)))
 521         return 0;
 522
 523     M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 524     if (!(p7i->issuer_and_serial->serial =
 525           M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
 526         return 0;
 527
 528     X509_ALGOR_free(p7i->key_enc_algor);
 529     if (!(p7i->key_enc_algor = X509_ALGOR_dup(x509->cert_info->key->algor)))
 530         return 0;
 531
 532     CRYPTO_add(&x509->references, 1, CRYPTO_LOCK_X509);
 533     p7i->cert = x509;
 534
 535     return (1);
 536 }
 537
 538 X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
 539 {
 540     if (PKCS7_type_is_signed(p7))
 541         return (X509_find_by_issuer_and_serial(p7->d.sign->cert,
 542                                                si->issuer_and_serial->issuer,
 543                                                si->
 544                                                issuer_and_serial->serial));
 545     else
 546         return (NULL);
 547 }
 548
 549 int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
 550 {
 551     int i;
 552     PKCS7_ENC_CONTENT *ec;
 553
 554     i = OBJ_obj2nid(p7->type);
 555     switch (i) {
 556     case NID_pkcs7_signedAndEnveloped:
 557         ec = p7->d.signed_and_enveloped->enc_data;
 558         break;
 559     case NID_pkcs7_enveloped:
 560         ec = p7->d.enveloped->enc_data;
 561         break;
 562     default:
 563         PKCS7err(PKCS7_F_PKCS7_SET_CIPHER, PKCS7_R_WRONG_CONTENT_TYPE);
 564         return (0);
 565     }
 566
 567     /* Check cipher OID exists and has data in it */
 568     i = EVP_CIPHER_type(cipher);
 569     if (i == NID_undef) {
 570         PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,
 571                  PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
 572         return (0);
 573     }
 574
 575     ec->cipher = cipher;
 576     return 1;
 577 }