crypto/pkcs7/pk7_smime.c

   1 /* pk7_smime.c */
   2 /*
   3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   4  * project.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 1999-2004 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  *
  54  * This product includes cryptographic software written by Eric Young
  55  * (eay@cryptsoft.com).  This product includes software written by Tim
  56  * Hudson (tjh@cryptsoft.com).
  57  *
  58  */
  59
  60 /* Simple PKCS#7 processing functions */
  61
  62 #include <stdio.h>
  63 #include "cryptlib.h"
  64 #include <openssl/x509.h>
  65 #include <openssl/x509v3.h>
  66
  67 static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si);
  68
  69 PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
  70                   BIO *data, int flags)
  71 {
  72     PKCS7 *p7;
  73     int i;
  74
  75     if (!(p7 = PKCS7_new())) {
  76         PKCS7err(PKCS7_F_PKCS7_SIGN, ERR_R_MALLOC_FAILURE);
  77         return NULL;
  78     }
  79
  80     if (!PKCS7_set_type(p7, NID_pkcs7_signed))
  81         goto err;
  82
  83     if (!PKCS7_content_new(p7, NID_pkcs7_data))
  84         goto err;
  85
  86     if (pkey && !PKCS7_sign_add_signer(p7, signcert, pkey, NULL, flags)) {
  87         PKCS7err(PKCS7_F_PKCS7_SIGN, PKCS7_R_PKCS7_ADD_SIGNER_ERROR);
  88         goto err;
  89     }
  90
  91     if (!(flags & PKCS7_NOCERTS)) {
  92         for (i = 0; i < sk_X509_num(certs); i++) {
  93             if (!PKCS7_add_certificate(p7, sk_X509_value(certs, i)))
  94                 goto err;
  95         }
  96     }
  97
  98     if (flags & PKCS7_DETACHED)
  99         PKCS7_set_detached(p7, 1);
 100
 101     if (flags & (PKCS7_STREAM | PKCS7_PARTIAL))
 102         return p7;
 103
 104     if (PKCS7_final(p7, data, flags))
 105         return p7;
 106
 107  err:
 108     PKCS7_free(p7);
 109     return NULL;
 110 }
 111
 112 int PKCS7_final(PKCS7 *p7, BIO *data, int flags)
 113 {
 114     BIO *p7bio;
 115     int ret = 0;
 116     if (!(p7bio = PKCS7_dataInit(p7, NULL))) {
 117         PKCS7err(PKCS7_F_PKCS7_FINAL, ERR_R_MALLOC_FAILURE);
 118         return 0;
 119     }
 120
 121     SMIME_crlf_copy(data, p7bio, flags);
 122
 123     (void)BIO_flush(p7bio);
 124
 125     if (!PKCS7_dataFinal(p7, p7bio)) {
 126         PKCS7err(PKCS7_F_PKCS7_FINAL, PKCS7_R_PKCS7_DATASIGN);
 127         goto err;
 128     }
 129
 130     ret = 1;
 131
 132  err:
 133     BIO_free_all(p7bio);
 134
 135     return ret;
 136
 137 }
 138
 139 /* Check to see if a cipher exists and if so add S/MIME capabilities */
 140
 141 static int add_cipher_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
 142 {
 143     if (EVP_get_cipherbynid(nid))
 144         return PKCS7_simple_smimecap(sk, nid, arg);
 145     return 1;
 146 }
 147
 148 static int add_digest_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
 149 {
 150     if (EVP_get_digestbynid(nid))
 151         return PKCS7_simple_smimecap(sk, nid, arg);
 152     return 1;
 153 }
 154
 155 PKCS7_SIGNER_INFO *PKCS7_sign_add_signer(PKCS7 *p7, X509 *signcert,
 156                                          EVP_PKEY *pkey, const EVP_MD *md,
 157                                          int flags)
 158 {
 159     PKCS7_SIGNER_INFO *si = NULL;
 160     STACK_OF(X509_ALGOR) *smcap = NULL;
 161     if (!X509_check_private_key(signcert, pkey)) {
 162         PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
 163                  PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
 164         return NULL;
 165     }
 166
 167     if (!(si = PKCS7_add_signature(p7, signcert, pkey, md))) {
 168         PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
 169                  PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR);
 170         return NULL;
 171     }
 172
 173     if (!(flags & PKCS7_NOCERTS)) {
 174         if (!PKCS7_add_certificate(p7, signcert))
 175             goto err;
 176     }
 177
 178     if (!(flags & PKCS7_NOATTR)) {
 179         if (!PKCS7_add_attrib_content_type(si, NULL))
 180             goto err;
 181         /* Add SMIMECapabilities */
 182         if (!(flags & PKCS7_NOSMIMECAP)) {
 183             if (!(smcap = sk_X509_ALGOR_new_null())) {
 184                 PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER, ERR_R_MALLOC_FAILURE);
 185                 goto err;
 186             }
 187             if (!add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
 188                 || !add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
 189                 || !add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
 190                 || !add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
 191                 || !add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
 192                 || !add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
 193                 || !add_cipher_smcap(smcap, NID_rc2_cbc, 128)
 194                 || !add_cipher_smcap(smcap, NID_rc2_cbc, 64)
 195                 || !add_cipher_smcap(smcap, NID_des_cbc, -1)
 196                 || !add_cipher_smcap(smcap, NID_rc2_cbc, 40)
 197                 || !PKCS7_add_attrib_smimecap(si, smcap))
 198                 goto err;
 199             sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
 200             smcap = NULL;
 201         }
 202         if (flags & PKCS7_REUSE_DIGEST) {
 203             if (!pkcs7_copy_existing_digest(p7, si))
 204                 goto err;
 205             if (!(flags & PKCS7_PARTIAL) && !PKCS7_SIGNER_INFO_sign(si))
 206                 goto err;
 207         }
 208     }
 209     return si;
 210  err:
 211     if (smcap)
 212         sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
 213     return NULL;
 214 }
 215
 216 /*
 217  * Search for a digest matching SignerInfo digest type and if found copy
 218  * across.
 219  */
 220
 221 static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
 222 {
 223     int i;
 224     STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
 225     PKCS7_SIGNER_INFO *sitmp;
 226     ASN1_OCTET_STRING *osdig = NULL;
 227     sinfos = PKCS7_get_signer_info(p7);
 228     for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
 229         sitmp = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
 230         if (si == sitmp)
 231             break;
 232         if (sk_X509_ATTRIBUTE_num(sitmp->auth_attr) <= 0)
 233             continue;
 234         if (!OBJ_cmp(si->digest_alg->algorithm, sitmp->digest_alg->algorithm)) {
 235             osdig = PKCS7_digest_from_attributes(sitmp->auth_attr);
 236             break;
 237         }
 238
 239     }
 240
 241     if (osdig)
 242         return PKCS7_add1_attrib_digest(si, osdig->data, osdig->length);
 243
 244     PKCS7err(PKCS7_F_PKCS7_COPY_EXISTING_DIGEST,
 245              PKCS7_R_NO_MATCHING_DIGEST_TYPE_FOUND);
 246     return 0;
 247 }
 248
 249 int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
 250                  BIO *indata, BIO *out, int flags)
 251 {
 252     STACK_OF(X509) *signers;
 253     X509 *signer;
 254     STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
 255     PKCS7_SIGNER_INFO *si;
 256     X509_STORE_CTX cert_ctx;
 257     char buf[4096];
 258     int i, j = 0, k, ret = 0;
 259     BIO *p7bio;
 260     BIO *tmpin, *tmpout;
 261
 262     if (!p7) {
 263         PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_INVALID_NULL_POINTER);
 264         return 0;
 265     }
 266
 267     if (!PKCS7_type_is_signed(p7)) {
 268         PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_WRONG_CONTENT_TYPE);
 269         return 0;
 270     }
 271
 272     /* Check for no data and no content: no data to verify signature */
 273     if (PKCS7_get_detached(p7) && !indata) {
 274         PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_CONTENT);
 275         return 0;
 276     }
 277
 278     /*
 279      * Very old Netscape illegally included empty content with
 280      * a detached signature. To not support that, enable the
 281      * following flag.
 282      */
 283 #ifdef OPENSSL_DONT_SUPPORT_OLD_NETSCAPE
 284     /* Check for data and content: two sets of data */
 285     if (!PKCS7_get_detached(p7) && indata) {
 286         PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_CONTENT_AND_DATA_PRESENT);
 287         return 0;
 288     }
 289 #endif
 290
 291     sinfos = PKCS7_get_signer_info(p7);
 292
 293     if (!sinfos || !sk_PKCS7_SIGNER_INFO_num(sinfos)) {
 294         PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_SIGNATURES_ON_DATA);
 295         return 0;
 296     }
 297
 298     signers = PKCS7_get0_signers(p7, certs, flags);
 299
 300     if (!signers)
 301         return 0;
 302
 303     /* Now verify the certificates */
 304
 305     if (!(flags & PKCS7_NOVERIFY))
 306         for (k = 0; k < sk_X509_num(signers); k++) {
 307             signer = sk_X509_value(signers, k);
 308             if (!(flags & PKCS7_NOCHAIN)) {
 309                 if (!X509_STORE_CTX_init(&cert_ctx, store, signer,
 310                                          p7->d.sign->cert)) {
 311                     PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
 312                     sk_X509_free(signers);
 313                     return 0;
 314                 }
 315                 X509_STORE_CTX_set_default(&cert_ctx, "smime_sign");
 316             } else if (!X509_STORE_CTX_init(&cert_ctx, store, signer, NULL)) {
 317                 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
 318                 sk_X509_free(signers);
 319                 return 0;
 320             }
 321             if (!(flags & PKCS7_NOCRL))
 322                 X509_STORE_CTX_set0_crls(&cert_ctx, p7->d.sign->crl);
 323             i = X509_verify_cert(&cert_ctx);
 324             if (i <= 0)
 325                 j = X509_STORE_CTX_get_error(&cert_ctx);
 326             X509_STORE_CTX_cleanup(&cert_ctx);
 327             if (i <= 0) {
 328                 PKCS7err(PKCS7_F_PKCS7_VERIFY,
 329                          PKCS7_R_CERTIFICATE_VERIFY_ERROR);
 330                 ERR_add_error_data(2, "Verify error:",
 331                                    X509_verify_cert_error_string(j));
 332                 sk_X509_free(signers);
 333                 return 0;
 334             }
 335             /* Check for revocation status here */
 336         }
 337
 338     /*
 339      * Performance optimization: if the content is a memory BIO then store
 340      * its contents in a temporary read only memory BIO. This avoids
 341      * potentially large numbers of slow copies of data which will occur when
 342      * reading from a read write memory BIO when signatures are calculated.
 343      */
 344
 345     if (indata && (BIO_method_type(indata) == BIO_TYPE_MEM)) {
 346         char *ptr;
 347         long len;
 348         len = BIO_get_mem_data(indata, &ptr);
 349         tmpin = BIO_new_mem_buf(ptr, len);
 350         if (tmpin == NULL) {
 351             PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
 352             return 0;
 353         }
 354     } else
 355         tmpin = indata;
 356
 357     if (!(p7bio = PKCS7_dataInit(p7, tmpin)))
 358         goto err;
 359
 360     if (flags & PKCS7_TEXT) {
 361         if (!(tmpout = BIO_new(BIO_s_mem()))) {
 362             PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
 363             goto err;
 364         }
 365         BIO_set_mem_eof_return(tmpout, 0);
 366     } else
 367         tmpout = out;
 368
 369     /* We now have to 'read' from p7bio to calculate digests etc. */
 370     for (;;) {
 371         i = BIO_read(p7bio, buf, sizeof(buf));
 372         if (i <= 0)
 373             break;
 374         if (tmpout)
 375             BIO_write(tmpout, buf, i);
 376     }
 377
 378     if (flags & PKCS7_TEXT) {
 379         if (!SMIME_text(tmpout, out)) {
 380             PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SMIME_TEXT_ERROR);
 381             BIO_free(tmpout);
 382             goto err;
 383         }
 384         BIO_free(tmpout);
 385     }
 386
 387     /* Now Verify All Signatures */
 388     if (!(flags & PKCS7_NOSIGS))
 389         for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
 390             si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
 391             signer = sk_X509_value(signers, i);
 392             j = PKCS7_signatureVerify(p7bio, p7, si, signer);
 393             if (j <= 0) {
 394                 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SIGNATURE_FAILURE);
 395                 goto err;
 396             }
 397         }
 398
 399     ret = 1;
 400
 401  err:
 402
 403     if (tmpin == indata) {
 404         if (indata)
 405             BIO_pop(p7bio);
 406     }
 407     BIO_free_all(p7bio);
 408
 409     sk_X509_free(signers);
 410
 411     return ret;
 412 }
 413
 414 STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs,
 415                                    int flags)
 416 {
 417     STACK_OF(X509) *signers;
 418     STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
 419     PKCS7_SIGNER_INFO *si;
 420     PKCS7_ISSUER_AND_SERIAL *ias;
 421     X509 *signer;
 422     int i;
 423
 424     if (!p7) {
 425         PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_INVALID_NULL_POINTER);
 426         return NULL;
 427     }
 428
 429     if (!PKCS7_type_is_signed(p7)) {
 430         PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_WRONG_CONTENT_TYPE);
 431         return NULL;
 432     }
 433
 434     /* Collect all the signers together */
 435
 436     sinfos = PKCS7_get_signer_info(p7);
 437
 438     if (sk_PKCS7_SIGNER_INFO_num(sinfos) <= 0) {
 439         PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_NO_SIGNERS);
 440         return 0;
 441     }
 442
 443     if (!(signers = sk_X509_new_null())) {
 444         PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, ERR_R_MALLOC_FAILURE);
 445         return NULL;
 446     }
 447
 448     for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
 449         si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
 450         ias = si->issuer_and_serial;
 451         signer = NULL;
 452         /* If any certificates passed they take priority */
 453         if (certs)
 454             signer = X509_find_by_issuer_and_serial(certs,
 455                                                     ias->issuer, ias->serial);
 456         if (!signer && !(flags & PKCS7_NOINTERN)
 457             && p7->d.sign->cert)
 458             signer =
 459                 X509_find_by_issuer_and_serial(p7->d.sign->cert,
 460                                                ias->issuer, ias->serial);
 461         if (!signer) {
 462             PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,
 463                      PKCS7_R_SIGNER_CERTIFICATE_NOT_FOUND);
 464             sk_X509_free(signers);
 465             return 0;
 466         }
 467
 468         if (!sk_X509_push(signers, signer)) {
 469             sk_X509_free(signers);
 470             return NULL;
 471         }
 472     }
 473     return signers;
 474 }
 475
 476 /* Build a complete PKCS#7 enveloped data */
 477
 478 PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, const EVP_CIPHER *cipher,
 479                      int flags)
 480 {
 481     PKCS7 *p7;
 482     BIO *p7bio = NULL;
 483     int i;
 484     X509 *x509;
 485     if (!(p7 = PKCS7_new())) {
 486         PKCS7err(PKCS7_F_PKCS7_ENCRYPT, ERR_R_MALLOC_FAILURE);
 487         return NULL;
 488     }
 489
 490     if (!PKCS7_set_type(p7, NID_pkcs7_enveloped))
 491         goto err;
 492     if (!PKCS7_set_cipher(p7, cipher)) {
 493         PKCS7err(PKCS7_F_PKCS7_ENCRYPT, PKCS7_R_ERROR_SETTING_CIPHER);
 494         goto err;
 495     }
 496
 497     for (i = 0; i < sk_X509_num(certs); i++) {
 498         x509 = sk_X509_value(certs, i);
 499         if (!PKCS7_add_recipient(p7, x509)) {
 500             PKCS7err(PKCS7_F_PKCS7_ENCRYPT, PKCS7_R_ERROR_ADDING_RECIPIENT);
 501             goto err;
 502         }
 503     }
 504
 505     if (flags & PKCS7_STREAM)
 506         return p7;
 507
 508     if (PKCS7_final(p7, in, flags))
 509         return p7;
 510
 511  err:
 512
 513     BIO_free_all(p7bio);
 514     PKCS7_free(p7);
 515     return NULL;
 516
 517 }
 518
 519 int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags)
 520 {
 521     BIO *tmpmem;
 522     int ret, i;
 523     char buf[4096];
 524
 525     if (!p7) {
 526         PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_INVALID_NULL_POINTER);
 527         return 0;
 528     }
 529
 530     if (!PKCS7_type_is_enveloped(p7)) {
 531         PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_WRONG_CONTENT_TYPE);
 532         return 0;
 533     }
 534
 535     if (cert && !X509_check_private_key(cert, pkey)) {
 536         PKCS7err(PKCS7_F_PKCS7_DECRYPT,
 537                  PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
 538         return 0;
 539     }
 540
 541     if (!(tmpmem = PKCS7_dataDecode(p7, pkey, NULL, cert))) {
 542         PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_DECRYPT_ERROR);
 543         return 0;
 544     }
 545
 546     if (flags & PKCS7_TEXT) {
 547         BIO *tmpbuf, *bread;
 548         /* Encrypt BIOs can't do BIO_gets() so add a buffer BIO */
 549         if (!(tmpbuf = BIO_new(BIO_f_buffer()))) {
 550             PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
 551             BIO_free_all(tmpmem);
 552             return 0;
 553         }
 554         if (!(bread = BIO_push(tmpbuf, tmpmem))) {
 555             PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
 556             BIO_free_all(tmpbuf);
 557             BIO_free_all(tmpmem);
 558             return 0;
 559         }
 560         ret = SMIME_text(bread, data);
 561         if (ret > 0 && BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
 562             if (!BIO_get_cipher_status(tmpmem))
 563                 ret = 0;
 564         }
 565         BIO_free_all(bread);
 566         return ret;
 567     } else {
 568         for (;;) {
 569             i = BIO_read(tmpmem, buf, sizeof(buf));
 570             if (i <= 0) {
 571                 ret = 1;
 572                 if (BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
 573                     if (!BIO_get_cipher_status(tmpmem))
 574                         ret = 0;
 575                 }
 576
 577                 break;
 578             }
 579             if (BIO_write(data, buf, i) != i) {
 580                 ret = 0;
 581                 break;
 582             }
 583         }
 584         BIO_free_all(tmpmem);
 585         return ret;
 586     }
 587 }