crypto/pkcs7/pk7_asn1.c

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