crypto/pkcs7/pk7_asn1.c

   1 /*
   2  * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 #include "pk7_local.h"
  16
  17 /* PKCS#7 ASN1 module */
  18
  19 /* This is the ANY DEFINED BY table for the top level PKCS#7 structure */
  20
  21 ASN1_ADB_TEMPLATE(p7default) = ASN1_EXP_OPT(PKCS7, d.other, ASN1_ANY, 0);
  22
  23 ASN1_ADB(PKCS7) = {
  24         ADB_ENTRY(NID_pkcs7_data, ASN1_NDEF_EXP_OPT(PKCS7, d.data, ASN1_OCTET_STRING_NDEF, 0)),
  25         ADB_ENTRY(NID_pkcs7_signed, ASN1_NDEF_EXP_OPT(PKCS7, d.sign, PKCS7_SIGNED, 0)),
  26         ADB_ENTRY(NID_pkcs7_enveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.enveloped, PKCS7_ENVELOPE, 0)),
  27         ADB_ENTRY(NID_pkcs7_signedAndEnveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.signed_and_enveloped, PKCS7_SIGN_ENVELOPE, 0)),
  28         ADB_ENTRY(NID_pkcs7_digest, ASN1_NDEF_EXP_OPT(PKCS7, d.digest, PKCS7_DIGEST, 0)),
  29         ADB_ENTRY(NID_pkcs7_encrypted, ASN1_NDEF_EXP_OPT(PKCS7, d.encrypted, PKCS7_ENCRYPT, 0))
  30 } ASN1_ADB_END(PKCS7, 0, type, 0, &p7default_tt, NULL);
  31
  32 /* PKCS#7 streaming support */
  33 static int pk7_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
  34                   void *exarg)
  35 {
  36     ASN1_STREAM_ARG *sarg = exarg;
  37     PKCS7 **pp7 = (PKCS7 **)pval;
  38
  39     switch (operation) {
  40
  41     case ASN1_OP_STREAM_PRE:
  42         if (PKCS7_stream(&sarg->boundary, *pp7) <= 0)
  43             return 0;
  44         /* fall thru */
  45     case ASN1_OP_DETACHED_PRE:
  46         sarg->ndef_bio = PKCS7_dataInit(*pp7, sarg->out);
  47         if (!sarg->ndef_bio)
  48             return 0;
  49         break;
  50
  51     case ASN1_OP_STREAM_POST:
  52     case ASN1_OP_DETACHED_POST:
  53         if (PKCS7_dataFinal(*pp7, sarg->ndef_bio) <= 0)
  54             return 0;
  55         break;
  56
  57     }
  58     return 1;
  59 }
  60
  61 ASN1_NDEF_SEQUENCE_cb(PKCS7, pk7_cb) = {
  62         ASN1_SIMPLE(PKCS7, type, ASN1_OBJECT),
  63         ASN1_ADB_OBJECT(PKCS7)
  64 }ASN1_NDEF_SEQUENCE_END_cb(PKCS7, PKCS7)
  65
  66 PKCS7 *d2i_PKCS7(PKCS7 **a, const unsigned char **in, long len)
  67 {
  68     PKCS7 *ret;
  69
  70     ret = (PKCS7 *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, (PKCS7_it()));
  71     if (ret != NULL && a != NULL)
  72         pkcs7_resolve_libctx(ret);
  73     return ret;
  74 }
  75
  76 int i2d_PKCS7(const PKCS7 *a, unsigned char **out)
  77 {
  78     return ASN1_item_i2d((const ASN1_VALUE *)a, out, (PKCS7_it()));\
  79 }
  80
  81 PKCS7 *PKCS7_new(void)
  82 {
  83     return (PKCS7 *)ASN1_item_new(ASN1_ITEM_rptr(PKCS7));
  84 }
  85
  86 PKCS7 *PKCS7_new_with_libctx(OPENSSL_CTX *libctx, const char *propq)
  87 {
  88     PKCS7 *pkcs7 = PKCS7_new();
  89
  90     if (pkcs7 != NULL) {
  91         pkcs7->ctx.libctx = libctx;
  92         pkcs7->ctx.propq = NULL;
  93         if (propq != NULL) {
  94             pkcs7->ctx.propq = OPENSSL_strdup(propq);
  95             if (pkcs7->ctx.propq == NULL) {
  96                 PKCS7_free(pkcs7);
  97                 pkcs7 = NULL;
  98                 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
  99             }
 100         }
 101     }
 102     return pkcs7;
 103 }
 104
 105 void PKCS7_free(PKCS7 *p7)
 106 {
 107     if (p7 != NULL) {
 108         OPENSSL_free(p7->ctx.propq);
 109         ASN1_item_free((ASN1_VALUE *)p7, ASN1_ITEM_rptr(PKCS7));
 110     }
 111 }
 112
 113 IMPLEMENT_ASN1_NDEF_FUNCTION(PKCS7)
 114
 115 IMPLEMENT_ASN1_DUP_FUNCTION(PKCS7)
 116
 117 ASN1_NDEF_SEQUENCE(PKCS7_SIGNED) = {
 118         ASN1_SIMPLE(PKCS7_SIGNED, version, ASN1_INTEGER),
 119         ASN1_SET_OF(PKCS7_SIGNED, md_algs, X509_ALGOR),
 120         ASN1_SIMPLE(PKCS7_SIGNED, contents, PKCS7),
 121         ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNED, cert, X509, 0),
 122         ASN1_IMP_SET_OF_OPT(PKCS7_SIGNED, crl, X509_CRL, 1),
 123         ASN1_SET_OF(PKCS7_SIGNED, signer_info, PKCS7_SIGNER_INFO)
 124 } ASN1_NDEF_SEQUENCE_END(PKCS7_SIGNED)
 125
 126 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNED)
 127
 128 /* Minor tweak to operation: free up EVP_PKEY */
 129 static int si_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
 130                  void *exarg)
 131 {
 132     if (operation == ASN1_OP_FREE_POST) {
 133         PKCS7_SIGNER_INFO *si = (PKCS7_SIGNER_INFO *)*pval;
 134         EVP_PKEY_free(si->pkey);
 135     }
 136     return 1;
 137 }
 138
 139 ASN1_SEQUENCE_cb(PKCS7_SIGNER_INFO, si_cb) = {
 140         ASN1_SIMPLE(PKCS7_SIGNER_INFO, version, ASN1_INTEGER),
 141         ASN1_SIMPLE(PKCS7_SIGNER_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
 142         ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_alg, X509_ALGOR),
 143         /* NB this should be a SET OF but we use a SEQUENCE OF so the
 144          * original order * is retained when the structure is reencoded.
 145          * Since the attributes are implicitly tagged this will not affect
 146          * the encoding.
 147          */
 148         ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNER_INFO, auth_attr, X509_ATTRIBUTE, 0),
 149         ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_enc_alg, X509_ALGOR),
 150         ASN1_SIMPLE(PKCS7_SIGNER_INFO, enc_digest, ASN1_OCTET_STRING),
 151         ASN1_IMP_SET_OF_OPT(PKCS7_SIGNER_INFO, unauth_attr, X509_ATTRIBUTE, 1)
 152 } ASN1_SEQUENCE_END_cb(PKCS7_SIGNER_INFO, PKCS7_SIGNER_INFO)
 153
 154 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNER_INFO)
 155
 156 ASN1_SEQUENCE(PKCS7_ISSUER_AND_SERIAL) = {
 157         ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, issuer, X509_NAME),
 158         ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, serial, ASN1_INTEGER)
 159 } ASN1_SEQUENCE_END(PKCS7_ISSUER_AND_SERIAL)
 160
 161 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ISSUER_AND_SERIAL)
 162
 163 ASN1_NDEF_SEQUENCE(PKCS7_ENVELOPE) = {
 164         ASN1_SIMPLE(PKCS7_ENVELOPE, version, ASN1_INTEGER),
 165         ASN1_SET_OF(PKCS7_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
 166         ASN1_SIMPLE(PKCS7_ENVELOPE, enc_data, PKCS7_ENC_CONTENT)
 167 } ASN1_NDEF_SEQUENCE_END(PKCS7_ENVELOPE)
 168
 169 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENVELOPE)
 170
 171 /* Minor tweak to operation: free up X509 */
 172 static int ri_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
 173                  void *exarg)
 174 {
 175     if (operation == ASN1_OP_FREE_POST) {
 176         PKCS7_RECIP_INFO *ri = (PKCS7_RECIP_INFO *)*pval;
 177         X509_free(ri->cert);
 178     }
 179     return 1;
 180 }
 181
 182 ASN1_SEQUENCE_cb(PKCS7_RECIP_INFO, ri_cb) = {
 183         ASN1_SIMPLE(PKCS7_RECIP_INFO, version, ASN1_INTEGER),
 184         ASN1_SIMPLE(PKCS7_RECIP_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
 185         ASN1_SIMPLE(PKCS7_RECIP_INFO, key_enc_algor, X509_ALGOR),
 186         ASN1_SIMPLE(PKCS7_RECIP_INFO, enc_key, ASN1_OCTET_STRING)
 187 } ASN1_SEQUENCE_END_cb(PKCS7_RECIP_INFO, PKCS7_RECIP_INFO)
 188
 189 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_RECIP_INFO)
 190
 191 ASN1_NDEF_SEQUENCE(PKCS7_ENC_CONTENT) = {
 192         ASN1_SIMPLE(PKCS7_ENC_CONTENT, content_type, ASN1_OBJECT),
 193         ASN1_SIMPLE(PKCS7_ENC_CONTENT, algorithm, X509_ALGOR),
 194         ASN1_IMP_OPT(PKCS7_ENC_CONTENT, enc_data, ASN1_OCTET_STRING_NDEF, 0)
 195 } ASN1_NDEF_SEQUENCE_END(PKCS7_ENC_CONTENT)
 196
 197 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENC_CONTENT)
 198
 199 ASN1_NDEF_SEQUENCE(PKCS7_SIGN_ENVELOPE) = {
 200         ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, version, ASN1_INTEGER),
 201         ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
 202         ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, md_algs, X509_ALGOR),
 203         ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, enc_data, PKCS7_ENC_CONTENT),
 204         ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, cert, X509, 0),
 205         ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, crl, X509_CRL, 1),
 206         ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, signer_info, PKCS7_SIGNER_INFO)
 207 } ASN1_NDEF_SEQUENCE_END(PKCS7_SIGN_ENVELOPE)
 208
 209 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGN_ENVELOPE)
 210
 211 ASN1_NDEF_SEQUENCE(PKCS7_ENCRYPT) = {
 212         ASN1_SIMPLE(PKCS7_ENCRYPT, version, ASN1_INTEGER),
 213         ASN1_SIMPLE(PKCS7_ENCRYPT, enc_data, PKCS7_ENC_CONTENT)
 214 } ASN1_NDEF_SEQUENCE_END(PKCS7_ENCRYPT)
 215
 216 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENCRYPT)
 217
 218 ASN1_NDEF_SEQUENCE(PKCS7_DIGEST) = {
 219         ASN1_SIMPLE(PKCS7_DIGEST, version, ASN1_INTEGER),
 220         ASN1_SIMPLE(PKCS7_DIGEST, md, X509_ALGOR),
 221         ASN1_SIMPLE(PKCS7_DIGEST, contents, PKCS7),
 222         ASN1_SIMPLE(PKCS7_DIGEST, digest, ASN1_OCTET_STRING)
 223 } ASN1_NDEF_SEQUENCE_END(PKCS7_DIGEST)
 224
 225 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_DIGEST)
 226
 227 /* Specials for authenticated attributes */
 228
 229 /*
 230  * When signing attributes we want to reorder them to match the sorted
 231  * encoding.
 232  */
 233
 234 ASN1_ITEM_TEMPLATE(PKCS7_ATTR_SIGN) =
 235         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_ORDER, 0, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
 236 ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_SIGN)
 237
 238 /*
 239  * When verifying attributes we need to use the received order. So we use
 240  * SEQUENCE OF and tag it to SET OF
 241  */
 242
 243 ASN1_ITEM_TEMPLATE(PKCS7_ATTR_VERIFY) =
 244         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_IMPTAG | ASN1_TFLG_UNIVERSAL,
 245                                 V_ASN1_SET, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
 246 ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_VERIFY)
 247
 248 IMPLEMENT_ASN1_PRINT_FUNCTION(PKCS7)