providers/common/der/der_sm2_sig.c

   1 /*
   2  * Copyright 2020-2021 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 <openssl/obj_mac.h>
  11 #include "internal/packet.h"
  12 #include "prov/der_sm2.h"
  13
  14 /* Aliases so we can have a uniform MD_CASE */
  15 #define ossl_der_oid_id_sm2_with_sm3   ossl_der_oid_sm2_with_SM3
  16
  17 #define MD_CASE(name)                                                   \
  18     case NID_##name:                                                    \
  19         precompiled = ossl_der_oid_id_sm2_with_##name;                  \
  20         precompiled_sz = sizeof(ossl_der_oid_id_sm2_with_##name);       \
  21         break;
  22
  23 int ossl_DER_w_algorithmIdentifier_SM2_with_MD(WPACKET *pkt, int cont,
  24                                                EC_KEY *ec, int mdnid)
  25 {
  26     const unsigned char *precompiled = NULL;
  27     size_t precompiled_sz = 0;
  28
  29     switch (mdnid) {
  30         MD_CASE(sm3);
  31     default:
  32         return 0;
  33     }
  34
  35     return ossl_DER_w_begin_sequence(pkt, cont)
  36         /* No parameters (yet?) */
  37         && ossl_DER_w_precompiled(pkt, -1, precompiled, precompiled_sz)
  38         && ossl_DER_w_end_sequence(pkt, cont);
  39 }