1/* pk7_mime.c */ 2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL 3 * project. 4 */ 5/* ==================================================================== 6 * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * 3. All advertising materials mentioning features or use of this 21 * software must display the following acknowledgment: 22 * "This product includes software developed by the OpenSSL Project 23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 24 * 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26 * endorse or promote products derived from this software without 27 * prior written permission. For written permission, please contact 28 * licensing@OpenSSL.org. 29 * 30 * 5. Products derived from this software may not be called "OpenSSL" 31 * nor may "OpenSSL" appear in their names without prior written 32 * permission of the OpenSSL Project. 33 * 34 * 6. Redistributions of any form whatsoever must retain the following 35 * acknowledgment: 36 * "This product includes software developed by the OpenSSL Project 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 38 * 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 50 * OF THE POSSIBILITY OF SUCH DAMAGE. 51 * ==================================================================== 52 * 53 */ 54 55#include <stdio.h> 56#include <ctype.h> 57#include "cryptlib.h" 58#include <openssl/rand.h> 59#include <openssl/x509.h> 60#include <openssl/asn1.h> 61 62/* PKCS#7 wrappers round generalised MIME routines */ 63 64PKCS7 *SMIME_read_PKCS7(BIO *bio, BIO **bcont) 65 { 66 return (PKCS7 *)SMIME_read_ASN1(bio, bcont, ASN1_ITEM_rptr(PKCS7)); 67 } 68 69/* Callback for int_smime_write_ASN1 */ 70 71static int pk7_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags, 72 const ASN1_ITEM *it) 73 { 74 PKCS7 *p7 = (PKCS7 *)val; 75 BIO *tmpbio, *p7bio; 76 77 if (!(flags & SMIME_DETACHED)) 78 { 79 SMIME_crlf_copy(data, out, flags); 80 return 1; 81 } 82 83 /* Let PKCS7 code prepend any needed BIOs */ 84 85 p7bio = PKCS7_dataInit(p7, out); 86 87 if (!p7bio) 88 return 0; 89 90 /* Copy data across, passing through filter BIOs for processing */ 91 SMIME_crlf_copy(data, p7bio, flags); 92 93 /* Finalize structure */ 94 if (PKCS7_dataFinal(p7, p7bio) <= 0) 95 goto err; 96 97 err: 98 99 /* Now remove any digests prepended to the BIO */ 100 101 while (p7bio != out) 102 { 103 tmpbio = BIO_pop(p7bio); 104 BIO_free(p7bio); 105 p7bio = tmpbio; 106 } 107 108 return 1; 109 110 } 111 112int SMIME_write_PKCS7(BIO *bio, PKCS7 *p7, BIO *data, int flags) 113 { 114 STACK_OF(X509_ALGOR) *mdalgs; 115 int ctype_nid = OBJ_obj2nid(p7->type); 116 if (ctype_nid == NID_pkcs7_signed) 117 mdalgs = p7->d.sign->md_algs; 118 else 119 mdalgs = NULL; 120 121 return int_smime_write_ASN1(bio, (ASN1_VALUE *)p7, data, flags, 122 ctype_nid, NID_undef, mdalgs, 123 pk7_output_data, 124 ASN1_ITEM_rptr(PKCS7)); 125 } 126