/* $OpenBSD: ecs_asn1.c,v 1.10 2022/01/05 20:39:04 tb Exp $ */

/* ====================================================================

 * Copyright (c) 2000-2002 The OpenSSL Project.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 *

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in

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 *    distribution.

 *

 * 3. All advertising materials mentioning features or use of this

 *    software must display the following acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"

 *

 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

 *    endorse or promote products derived from this software without

 *    prior written permission. For written permission, please contact

 *    licensing@OpenSSL.org.

 *

 * 5. Products derived from this software may not be called "OpenSSL"

 *    nor may "OpenSSL" appear in their names without prior written

 *    permission of the OpenSSL Project.

 *

 * 6. Redistributions of any form whatsoever must retain the following

 *    acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"

 *

 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR

 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

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 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

 * OF THE POSSIBILITY OF SUCH DAMAGE.

 * ====================================================================

 *

 * This product includes cryptographic software written by Eric Young

 * (eay@cryptsoft.com).  This product includes software written by Tim

 * Hudson (tjh@cryptsoft.com).

 *

 */

#include "ecs_locl.h"

#include <openssl/err.h>

#include <openssl/asn1t.h>

static const ASN1_TEMPLATE ECDSA_SIG_seq_tt[] = {

  {

    .flags = 0,

    .tag = 0,

    .offset = offsetof(ECDSA_SIG, r),

    .field_name = "r",

    .item = &CBIGNUM_it,

  },

  {

    .flags = 0,

    .tag = 0,

    .offset = offsetof(ECDSA_SIG, s),

    .field_name = "s",

    .item = &CBIGNUM_it,

  },

};

const ASN1_ITEM ECDSA_SIG_it = {

  .itype = ASN1_ITYPE_SEQUENCE,

  .utype = V_ASN1_SEQUENCE,

  .templates = ECDSA_SIG_seq_tt,

  .tcount = sizeof(ECDSA_SIG_seq_tt) / sizeof(ASN1_TEMPLATE),

  .funcs = NULL,

  .size = sizeof(ECDSA_SIG),

  .sname = "ECDSA_SIG",

};

ECDSA_SIG *ECDSA_SIG_new(void);

void ECDSA_SIG_free(ECDSA_SIG *a);

ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **a, const unsigned char **in, long len);

int i2d_ECDSA_SIG(const ECDSA_SIG *a, unsigned char **out);

ECDSA_SIG *

d2i_ECDSA_SIG(ECDSA_SIG **a, const unsigned char **in, long len)

{

  return (ECDSA_SIG *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,

      &ECDSA_SIG_it);

}

int

i2d_ECDSA_SIG(const ECDSA_SIG *a, unsigned char **out)

{

  return ASN1_item_i2d((ASN1_VALUE *)a, out, &ECDSA_SIG_it);

}

ECDSA_SIG *

ECDSA_SIG_new(void)

{

  return (ECDSA_SIG *)ASN1_item_new(&ECDSA_SIG_it);

}

void

ECDSA_SIG_free(ECDSA_SIG *a)

{

  ASN1_item_free((ASN1_VALUE *)a, &ECDSA_SIG_it);

}

void

ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps)

{

  if (pr != NULL)

    *pr = sig->r;

  if (ps != NULL)

    *ps = sig->s;

}

const BIGNUM *

ECDSA_SIG_get0_r(const ECDSA_SIG *sig)

{

  return sig->r;

}

const BIGNUM *

ECDSA_SIG_get0_s(const ECDSA_SIG *sig)

{

  return sig->s;

}

int

ECDSA_SIG_set0(ECDSA_SIG *sig, BIGNUM *r, BIGNUM *s)

{

  if (r == NULL || s == NULL)

    return 0;

  BN_clear_free(sig->r);

  BN_clear_free(sig->s);

  sig->r = r;

  sig->s = s;

  return 1;

}