[331] | 1 | /*
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| 2 | * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include "internal/cryptlib.h"
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| 12 | #include <openssl/asn1t.h>
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| 13 | #include <openssl/pkcs7.h>
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| 14 | #include <openssl/x509.h>
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| 15 |
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| 16 | /* PKCS#7 ASN1 module */
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| 17 |
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| 18 | /* This is the ANY DEFINED BY table for the top level PKCS#7 structure */
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| 19 |
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| 20 | ASN1_ADB_TEMPLATE(p7default) = ASN1_EXP_OPT(PKCS7, d.other, ASN1_ANY, 0);
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| 21 |
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| 22 | ASN1_ADB(PKCS7) = {
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| 23 | ADB_ENTRY(NID_pkcs7_data, ASN1_NDEF_EXP_OPT(PKCS7, d.data, ASN1_OCTET_STRING_NDEF, 0)),
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| 24 | ADB_ENTRY(NID_pkcs7_signed, ASN1_NDEF_EXP_OPT(PKCS7, d.sign, PKCS7_SIGNED, 0)),
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| 25 | ADB_ENTRY(NID_pkcs7_enveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.enveloped, PKCS7_ENVELOPE, 0)),
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| 26 | ADB_ENTRY(NID_pkcs7_signedAndEnveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.signed_and_enveloped, PKCS7_SIGN_ENVELOPE, 0)),
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| 27 | ADB_ENTRY(NID_pkcs7_digest, ASN1_NDEF_EXP_OPT(PKCS7, d.digest, PKCS7_DIGEST, 0)),
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| 28 | ADB_ENTRY(NID_pkcs7_encrypted, ASN1_NDEF_EXP_OPT(PKCS7, d.encrypted, PKCS7_ENCRYPT, 0))
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| 29 | } ASN1_ADB_END(PKCS7, 0, type, 0, &p7default_tt, NULL);
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| 30 |
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| 31 | /* PKCS#7 streaming support */
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| 32 | static int pk7_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
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| 33 | void *exarg)
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| 34 | {
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| 35 | ASN1_STREAM_ARG *sarg = exarg;
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| 36 | PKCS7 **pp7 = (PKCS7 **)pval;
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| 37 |
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| 38 | switch (operation) {
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| 39 |
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| 40 | case ASN1_OP_STREAM_PRE:
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| 41 | if (PKCS7_stream(&sarg->boundary, *pp7) <= 0)
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| 42 | return 0;
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| 43 | case ASN1_OP_DETACHED_PRE:
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| 44 | sarg->ndef_bio = PKCS7_dataInit(*pp7, sarg->out);
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| 45 | if (!sarg->ndef_bio)
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| 46 | return 0;
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| 47 | break;
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| 48 |
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| 49 | case ASN1_OP_STREAM_POST:
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| 50 | case ASN1_OP_DETACHED_POST:
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| 51 | if (PKCS7_dataFinal(*pp7, sarg->ndef_bio) <= 0)
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| 52 | return 0;
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| 53 | break;
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| 54 |
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| 55 | }
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| 56 | return 1;
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| 57 | }
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| 58 |
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| 59 | ASN1_NDEF_SEQUENCE_cb(PKCS7, pk7_cb) = {
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| 60 | ASN1_SIMPLE(PKCS7, type, ASN1_OBJECT),
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| 61 | ASN1_ADB_OBJECT(PKCS7)
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| 62 | }ASN1_NDEF_SEQUENCE_END_cb(PKCS7, PKCS7)
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| 63 |
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| 64 | IMPLEMENT_ASN1_FUNCTIONS(PKCS7)
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| 65 |
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| 66 | IMPLEMENT_ASN1_NDEF_FUNCTION(PKCS7)
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| 67 |
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| 68 | IMPLEMENT_ASN1_DUP_FUNCTION(PKCS7)
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| 69 |
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| 70 | ASN1_NDEF_SEQUENCE(PKCS7_SIGNED) = {
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| 71 | ASN1_SIMPLE(PKCS7_SIGNED, version, ASN1_INTEGER),
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| 72 | ASN1_SET_OF(PKCS7_SIGNED, md_algs, X509_ALGOR),
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| 73 | ASN1_SIMPLE(PKCS7_SIGNED, contents, PKCS7),
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| 74 | ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNED, cert, X509, 0),
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| 75 | ASN1_IMP_SET_OF_OPT(PKCS7_SIGNED, crl, X509_CRL, 1),
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| 76 | ASN1_SET_OF(PKCS7_SIGNED, signer_info, PKCS7_SIGNER_INFO)
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| 77 | } ASN1_NDEF_SEQUENCE_END(PKCS7_SIGNED)
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| 78 |
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| 79 | IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNED)
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| 80 |
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| 81 | /* Minor tweak to operation: free up EVP_PKEY */
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| 82 | static int si_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
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| 83 | void *exarg)
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| 84 | {
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| 85 | if (operation == ASN1_OP_FREE_POST) {
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| 86 | PKCS7_SIGNER_INFO *si = (PKCS7_SIGNER_INFO *)*pval;
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| 87 | EVP_PKEY_free(si->pkey);
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| 88 | }
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| 89 | return 1;
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| 90 | }
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| 91 |
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| 92 | ASN1_SEQUENCE_cb(PKCS7_SIGNER_INFO, si_cb) = {
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| 93 | ASN1_SIMPLE(PKCS7_SIGNER_INFO, version, ASN1_INTEGER),
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| 94 | ASN1_SIMPLE(PKCS7_SIGNER_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
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| 95 | ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_alg, X509_ALGOR),
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| 96 | /* NB this should be a SET OF but we use a SEQUENCE OF so the
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| 97 | * original order * is retained when the structure is reencoded.
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| 98 | * Since the attributes are implicitly tagged this will not affect
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| 99 | * the encoding.
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| 100 | */
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| 101 | ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNER_INFO, auth_attr, X509_ATTRIBUTE, 0),
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| 102 | ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_enc_alg, X509_ALGOR),
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| 103 | ASN1_SIMPLE(PKCS7_SIGNER_INFO, enc_digest, ASN1_OCTET_STRING),
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| 104 | ASN1_IMP_SET_OF_OPT(PKCS7_SIGNER_INFO, unauth_attr, X509_ATTRIBUTE, 1)
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| 105 | } ASN1_SEQUENCE_END_cb(PKCS7_SIGNER_INFO, PKCS7_SIGNER_INFO)
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| 106 |
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| 107 | IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNER_INFO)
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| 108 |
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| 109 | ASN1_SEQUENCE(PKCS7_ISSUER_AND_SERIAL) = {
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| 110 | ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, issuer, X509_NAME),
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| 111 | ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, serial, ASN1_INTEGER)
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| 112 | } ASN1_SEQUENCE_END(PKCS7_ISSUER_AND_SERIAL)
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| 113 |
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| 114 | IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ISSUER_AND_SERIAL)
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| 115 |
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| 116 | ASN1_NDEF_SEQUENCE(PKCS7_ENVELOPE) = {
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| 117 | ASN1_SIMPLE(PKCS7_ENVELOPE, version, ASN1_INTEGER),
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| 118 | ASN1_SET_OF(PKCS7_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
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| 119 | ASN1_SIMPLE(PKCS7_ENVELOPE, enc_data, PKCS7_ENC_CONTENT)
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| 120 | } ASN1_NDEF_SEQUENCE_END(PKCS7_ENVELOPE)
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| 121 |
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| 122 | IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENVELOPE)
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| 123 |
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| 124 | /* Minor tweak to operation: free up X509 */
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| 125 | static int ri_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
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| 126 | void *exarg)
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| 127 | {
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| 128 | if (operation == ASN1_OP_FREE_POST) {
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| 129 | PKCS7_RECIP_INFO *ri = (PKCS7_RECIP_INFO *)*pval;
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| 130 | X509_free(ri->cert);
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| 131 | }
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| 132 | return 1;
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| 133 | }
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| 134 |
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| 135 | ASN1_SEQUENCE_cb(PKCS7_RECIP_INFO, ri_cb) = {
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| 136 | ASN1_SIMPLE(PKCS7_RECIP_INFO, version, ASN1_INTEGER),
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| 137 | ASN1_SIMPLE(PKCS7_RECIP_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
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| 138 | ASN1_SIMPLE(PKCS7_RECIP_INFO, key_enc_algor, X509_ALGOR),
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| 139 | ASN1_SIMPLE(PKCS7_RECIP_INFO, enc_key, ASN1_OCTET_STRING)
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| 140 | } ASN1_SEQUENCE_END_cb(PKCS7_RECIP_INFO, PKCS7_RECIP_INFO)
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| 141 |
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| 142 | IMPLEMENT_ASN1_FUNCTIONS(PKCS7_RECIP_INFO)
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| 143 |
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| 144 | ASN1_NDEF_SEQUENCE(PKCS7_ENC_CONTENT) = {
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| 145 | ASN1_SIMPLE(PKCS7_ENC_CONTENT, content_type, ASN1_OBJECT),
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| 146 | ASN1_SIMPLE(PKCS7_ENC_CONTENT, algorithm, X509_ALGOR),
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| 147 | ASN1_IMP_OPT(PKCS7_ENC_CONTENT, enc_data, ASN1_OCTET_STRING_NDEF, 0)
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| 148 | } ASN1_NDEF_SEQUENCE_END(PKCS7_ENC_CONTENT)
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| 149 |
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| 150 | IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENC_CONTENT)
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| 151 |
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| 152 | ASN1_NDEF_SEQUENCE(PKCS7_SIGN_ENVELOPE) = {
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| 153 | ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, version, ASN1_INTEGER),
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| 154 | ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
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| 155 | ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, md_algs, X509_ALGOR),
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| 156 | ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, enc_data, PKCS7_ENC_CONTENT),
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| 157 | ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, cert, X509, 0),
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| 158 | ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, crl, X509_CRL, 1),
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| 159 | ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, signer_info, PKCS7_SIGNER_INFO)
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| 160 | } ASN1_NDEF_SEQUENCE_END(PKCS7_SIGN_ENVELOPE)
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| 161 |
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| 162 | IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGN_ENVELOPE)
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| 163 |
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| 164 | ASN1_NDEF_SEQUENCE(PKCS7_ENCRYPT) = {
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| 165 | ASN1_SIMPLE(PKCS7_ENCRYPT, version, ASN1_INTEGER),
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| 166 | ASN1_SIMPLE(PKCS7_ENCRYPT, enc_data, PKCS7_ENC_CONTENT)
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| 167 | } ASN1_NDEF_SEQUENCE_END(PKCS7_ENCRYPT)
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| 168 |
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| 169 | IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENCRYPT)
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| 170 |
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| 171 | ASN1_NDEF_SEQUENCE(PKCS7_DIGEST) = {
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| 172 | ASN1_SIMPLE(PKCS7_DIGEST, version, ASN1_INTEGER),
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| 173 | ASN1_SIMPLE(PKCS7_DIGEST, md, X509_ALGOR),
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| 174 | ASN1_SIMPLE(PKCS7_DIGEST, contents, PKCS7),
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| 175 | ASN1_SIMPLE(PKCS7_DIGEST, digest, ASN1_OCTET_STRING)
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| 176 | } ASN1_NDEF_SEQUENCE_END(PKCS7_DIGEST)
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| 177 |
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| 178 | IMPLEMENT_ASN1_FUNCTIONS(PKCS7_DIGEST)
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| 179 |
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| 180 | /* Specials for authenticated attributes */
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| 181 |
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| 182 | /*
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| 183 | * When signing attributes we want to reorder them to match the sorted
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| 184 | * encoding.
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| 185 | */
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| 186 |
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| 187 | ASN1_ITEM_TEMPLATE(PKCS7_ATTR_SIGN) =
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| 188 | ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_ORDER, 0, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
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| 189 | ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_SIGN)
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| 190 |
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| 191 | /*
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| 192 | * When verifying attributes we need to use the received order. So we use
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| 193 | * SEQUENCE OF and tag it to SET OF
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| 194 | */
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| 195 |
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| 196 | ASN1_ITEM_TEMPLATE(PKCS7_ATTR_VERIFY) =
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| 197 | ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_IMPTAG | ASN1_TFLG_UNIVERSAL,
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| 198 | V_ASN1_SET, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
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| 199 | ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_VERIFY)
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| 200 |
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| 201 | IMPLEMENT_ASN1_PRINT_FUNCTION(PKCS7)
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