lib/libcrypto/ecdsa/ecs_asn1.c

   1 /* $OpenBSD: ecs_asn1.c,v 1.9 2018/03/17 15:24:44 tb Exp $ */
   2 /* ====================================================================
   3  * Copyright (c) 2000-2002 The OpenSSL Project.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the
  15  *    distribution.
  16  *
  17  * 3. All advertising materials mentioning features or use of this
  18  *    software must display the following acknowledgment:
  19  *    "This product includes software developed by the OpenSSL Project
  20  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  21  *
  22  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  23  *    endorse or promote products derived from this software without
  24  *    prior written permission. For written permission, please contact
  25  *    licensing@OpenSSL.org.
  26  *
  27  * 5. Products derived from this software may not be called "OpenSSL"
  28  *    nor may "OpenSSL" appear in their names without prior written
  29  *    permission of the OpenSSL Project.
  30  *
  31  * 6. Redistributions of any form whatsoever must retain the following
  32  *    acknowledgment:
  33  *    "This product includes software developed by the OpenSSL Project
  34  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  35  *
  36  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  37  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  38  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  39  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  40  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  41  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  42  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  43  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  44  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  45  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  46  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  47  * OF THE POSSIBILITY OF SUCH DAMAGE.
  48  * ====================================================================
  49  *
  50  * This product includes cryptographic software written by Eric Young
  51  * (eay@cryptsoft.com).  This product includes software written by Tim
  52  * Hudson (tjh@cryptsoft.com).
  53  *
  54  */
  55
  56 #include "ecs_locl.h"
  57 #include <openssl/err.h>
  58 #include <openssl/asn1t.h>
  59
  60 static const ASN1_TEMPLATE ECDSA_SIG_seq_tt[] = {
  61         {
  62                 .flags = 0,
  63                 .tag = 0,
  64                 .offset = offsetof(ECDSA_SIG, r),
  65                 .field_name = "r",
  66                 .item = &CBIGNUM_it,
  67         },
  68         {
  69                 .flags = 0,
  70                 .tag = 0,
  71                 .offset = offsetof(ECDSA_SIG, s),
  72                 .field_name = "s",
  73                 .item = &CBIGNUM_it,
  74         },
  75 };
  76
  77 const ASN1_ITEM ECDSA_SIG_it = {
  78         .itype = ASN1_ITYPE_SEQUENCE,
  79         .utype = V_ASN1_SEQUENCE,
  80         .templates = ECDSA_SIG_seq_tt,
  81         .tcount = sizeof(ECDSA_SIG_seq_tt) / sizeof(ASN1_TEMPLATE),
  82         .funcs = NULL,
  83         .size = sizeof(ECDSA_SIG),
  84         .sname = "ECDSA_SIG",
  85 };
  86
  87 ECDSA_SIG *ECDSA_SIG_new(void);
  88 void ECDSA_SIG_free(ECDSA_SIG *a);
  89 ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **a, const unsigned char **in, long len);
  90 int i2d_ECDSA_SIG(const ECDSA_SIG *a, unsigned char **out);
  91
  92 ECDSA_SIG *
  93 d2i_ECDSA_SIG(ECDSA_SIG **a, const unsigned char **in, long len)
  94 {
  95         return (ECDSA_SIG *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
  96             &ECDSA_SIG_it);
  97 }
  98
  99 int
 100 i2d_ECDSA_SIG(const ECDSA_SIG *a, unsigned char **out)
 101 {
 102         return ASN1_item_i2d((ASN1_VALUE *)a, out, &ECDSA_SIG_it);
 103 }
 104
 105 ECDSA_SIG *
 106 ECDSA_SIG_new(void)
 107 {
 108         return (ECDSA_SIG *)ASN1_item_new(&ECDSA_SIG_it);
 109 }
 110
 111 void
 112 ECDSA_SIG_free(ECDSA_SIG *a)
 113 {
 114         ASN1_item_free((ASN1_VALUE *)a, &ECDSA_SIG_it);
 115 }
 116
 117 void
 118 ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps)
 119 {
 120         if (pr != NULL)
 121                 *pr = sig->r;
 122         if (ps != NULL)
 123                 *ps = sig->s;
 124 }
 125
 126 int
 127 ECDSA_SIG_set0(ECDSA_SIG *sig, BIGNUM *r, BIGNUM *s)
 128 {
 129         if (r == NULL || s == NULL)
 130                 return 0;
 131
 132         BN_clear_free(sig->r);
 133         BN_clear_free(sig->s);
 134         sig->r = r;
 135         sig->s = s;
 136         return 1;
 137 }