356 lines
9.8 KiB
C
356 lines
9.8 KiB
C
/* crypto/ecdsa/ecs_asn1.c */
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/* ====================================================================
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* Copyright (c) 2000-2002 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include "ecdsa.h"
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#include "cryptlib.h"
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#include <openssl/asn1.h>
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#include <openssl/asn1t.h>
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typedef struct ecdsa_priv_key_st {
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int version;
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ECPKPARAMETERS *parameters;
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ASN1_OBJECT *named_curve;
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ASN1_OCTET_STRING *pub_key;
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BIGNUM *priv_key;
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} ECDSAPrivateKey;
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ASN1_SEQUENCE(ECDSA_SIG) = {
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ASN1_SIMPLE(ECDSA_SIG, r, CBIGNUM),
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ASN1_SIMPLE(ECDSA_SIG, s, CBIGNUM)
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} ASN1_SEQUENCE_END(ECDSA_SIG)
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DECLARE_ASN1_FUNCTIONS_const(ECDSA_SIG)
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DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSA_SIG, ECDSA_SIG)
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IMPLEMENT_ASN1_FUNCTIONS_const(ECDSA_SIG)
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ASN1_SEQUENCE(ECDSAPrivateKey) = {
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ASN1_SIMPLE(ECDSAPrivateKey, version, LONG),
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ASN1_SIMPLE(ECDSAPrivateKey, parameters, ECPKPARAMETERS),
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ASN1_SIMPLE(ECDSAPrivateKey, pub_key, ASN1_OCTET_STRING),
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ASN1_SIMPLE(ECDSAPrivateKey, priv_key, BIGNUM)
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} ASN1_SEQUENCE_END(ECDSAPrivateKey)
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DECLARE_ASN1_FUNCTIONS_const(ECDSAPrivateKey)
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DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSAPrivateKey, ecdsaPrivateKey)
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IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(ECDSAPrivateKey, ECDSAPrivateKey, ECDSAPrivateKey)
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IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(ECDSAPrivateKey, ECDSAPrivateKey, ecdsaPrivateKey)
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int i2d_ECDSAParameters(ECDSA *a, unsigned char **out)
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{
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if (a == NULL)
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{
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ECDSAerr(ECDSA_F_I2D_ECDSAPARAMETERS,
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ERR_R_PASSED_NULL_PARAMETER);
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return 0;
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}
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return i2d_ECPKParameters(a->group, out);
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}
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ECDSA *d2i_ECDSAParameters(ECDSA **a, const unsigned char **in, long len)
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{
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EC_GROUP *group;
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ECDSA *ret;
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if (in == NULL || *in == NULL)
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{
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ECDSAerr(ECDSA_F_D2I_ECDSAPARAMETERS,
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ERR_R_PASSED_NULL_PARAMETER);
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return NULL;
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}
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group = d2i_ECPKParameters(NULL, in, len);
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if (group == NULL)
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{
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ECDSAerr(ECDSA_F_D2I_ECDSAPARAMETERS,
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ERR_R_EC_LIB);
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return NULL;
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}
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if (a == NULL || *a == NULL)
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{
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if ((ret = ECDSA_new()) == NULL)
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{
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ECDSAerr(ECDSA_F_D2I_ECDSAPARAMETERS,
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ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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if (a)
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*a = ret;
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}
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else
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ret = *a;
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if (ret->group)
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EC_GROUP_clear_free(ret->group);
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ret->group = group;
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return ret;
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}
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ECDSA *d2i_ECDSAPrivateKey(ECDSA **a, const unsigned char **in, long len)
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{
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int ok=0;
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ECDSA *ret=NULL;
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ECDSAPrivateKey *priv_key=NULL;
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if ((priv_key = ECDSAPrivateKey_new()) == NULL)
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{
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ECDSAerr(ECDSA_F_D2I_ECDSAPRIVATEKEY, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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if ((priv_key = d2i_ecdsaPrivateKey(&priv_key, in, len)) == NULL)
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{
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ECDSAerr(ECDSA_F_D2I_ECDSAPRIVATEKEY,
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ECDSA_R_D2I_ECDSA_PRIVATEKEY_FAILURE);
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ECDSAPrivateKey_free(priv_key);
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return NULL;
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}
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if (a == NULL || *a == NULL)
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{
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if ((ret = ECDSA_new()) == NULL)
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{
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ECDSAerr(ECDSA_F_D2I_ECDSAPRIVATEKEY,
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ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (a)
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*a = ret;
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}
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else
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ret = *a;
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if (ret->group)
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EC_GROUP_clear_free(ret->group);
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ret->group = EC_ASN1_pkparameters2group(priv_key->parameters);
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if (ret->group == NULL)
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{
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ECDSAerr(ECDSA_F_D2I_ECDSAPRIVATEKEY, ERR_R_EC_LIB);
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goto err;
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}
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ret->version = priv_key->version;
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if (priv_key->priv_key)
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{
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if ((ret->priv_key = BN_dup(priv_key->priv_key)) == NULL)
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{
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ECDSAerr(ECDSA_F_D2I_ECDSAPRIVATEKEY,
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ERR_R_BN_LIB);
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goto err;
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}
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}
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else
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{
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ECDSAerr(ECDSA_F_D2I_ECDSAPRIVATEKEY,
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ECDSA_R_MISSING_PRIVATE_KEY);
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goto err;
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}
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if ((ret->pub_key = EC_POINT_new(ret->group)) == NULL)
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{
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ECDSAerr(ECDSA_F_D2I_ECDSAPRIVATEKEY, ERR_R_EC_LIB);
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goto err;
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}
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if (!EC_POINT_oct2point(ret->group, ret->pub_key,
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priv_key->pub_key->data, priv_key->pub_key->length, NULL))
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{
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ECDSAerr(ECDSA_F_D2I_ECDSAPRIVATEKEY, ERR_R_EC_LIB);
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goto err;
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}
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ok = 1;
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err : if (!ok)
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{
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if (ret) ECDSA_free(ret);
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ret = NULL;
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}
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if (priv_key)
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ECDSAPrivateKey_free(priv_key);
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return(ret);
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}
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int i2d_ECDSAPrivateKey(ECDSA *a, unsigned char **out)
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{
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int ret=0, ok=0;
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unsigned char *buffer=NULL;
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size_t buf_len=0;
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ECDSAPrivateKey *priv_key=NULL;
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if (a == NULL || a->group == NULL)
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{
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ECDSAerr(ECDSA_F_I2D_ECDSAPRIVATEKEY,
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ERR_R_PASSED_NULL_PARAMETER);
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goto err;
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}
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if ((priv_key = ECDSAPrivateKey_new()) == NULL)
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{
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ECDSAerr(ECDSA_F_I2D_ECDSAPRIVATEKEY,
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ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if ((priv_key->parameters = EC_ASN1_group2pkparameters(a->group,
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priv_key->parameters)) == NULL)
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{
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ECDSAerr(ECDSA_F_I2D_ECDSAPRIVATEKEY, ERR_R_EC_LIB);
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goto err;
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}
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priv_key->version = a->version;
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if (BN_copy(priv_key->priv_key, a->priv_key) == NULL)
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{
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ECDSAerr(ECDSA_F_I2D_ECDSAPRIVATEKEY, ERR_R_BN_LIB);
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goto err;
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}
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buf_len = EC_POINT_point2oct(a->group, a->pub_key,
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ECDSA_get_conversion_form(a), NULL, 0, NULL);
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if ((buffer = OPENSSL_malloc(buf_len)) == NULL)
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{
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ECDSAerr(ECDSA_F_I2D_ECDSAPRIVATEKEY, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (!EC_POINT_point2oct(a->group, a->pub_key,
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ECDSA_get_conversion_form(a), buffer, buf_len, NULL))
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{
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ECDSAerr(ECDSA_F_I2D_ECDSAPRIVATEKEY, ERR_R_EC_LIB);
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goto err;
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}
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if (!M_ASN1_OCTET_STRING_set(priv_key->pub_key, buffer, buf_len))
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{
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ECDSAerr(ECDSA_F_I2D_ECDSAPRIVATEKEY, ERR_R_ASN1_LIB);
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goto err;
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}
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if ((ret = i2d_ecdsaPrivateKey(priv_key, out)) == 0)
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{
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ECDSAerr(ECDSA_F_I2D_ECDSAPRIVATEKEY,
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ECDSA_R_I2D_ECDSA_PRIVATEKEY);
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goto err;
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}
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ok=1;
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err:
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if (buffer)
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OPENSSL_free(buffer);
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if (priv_key)
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ECDSAPrivateKey_free(priv_key);
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return(ok?ret:0);
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}
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ECDSA *ECDSAPublicKey_set_octet_string(ECDSA **a, const unsigned char **in, long len)
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{
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ECDSA *ret=NULL;
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if (a == NULL || (*a) == NULL || (*a)->group == NULL)
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{
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/* sorry, but a EC_GROUP-structur is necessary
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* to set the public key */
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ECDSAerr(ECDSA_F_D2I_ECDSAPRIVATEKEY, ECDSA_R_MISSING_PARAMETERS);
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return 0;
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}
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ret = *a;
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if (ret->pub_key == NULL && (ret->pub_key = EC_POINT_new(ret->group)) == NULL)
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{
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ECDSAerr(ECDSA_F_D2I_ECDSAPRIVATEKEY, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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if (!EC_POINT_oct2point(ret->group, ret->pub_key, *in, len, NULL))
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{
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ECDSAerr(ECDSA_F_D2I_ECDSAPRIVATEKEY, ERR_R_EC_LIB);
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return 0;
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}
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ECDSA_set_conversion_form(ret, (point_conversion_form_t)(*in[0] & ~0x01));
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return ret;
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}
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int ECDSAPublicKey_get_octet_string(ECDSA *a, unsigned char **out)
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{
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size_t buf_len=0;
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if (a == NULL)
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{
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ECDSAerr(ECDSA_F_I2D_ECDSAPUBLICKEY, ECDSA_R_MISSING_PARAMETERS);
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return 0;
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}
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buf_len = EC_POINT_point2oct(a->group, a->pub_key,
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ECDSA_get_conversion_form(a), NULL, 0, NULL);
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if (out == NULL || buf_len == 0)
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/* out == NULL => just return the length of the octet string */
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return buf_len;
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if (*out == NULL)
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if ((*out = OPENSSL_malloc(buf_len)) == NULL)
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{
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ECDSAerr(ECDSA_F_I2D_ECDSAPUBLICKEY, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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if (!EC_POINT_point2oct(a->group, a->pub_key, ECDSA_get_conversion_form(a),
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*out, buf_len, NULL))
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{
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ECDSAerr(ECDSA_F_I2D_ECDSAPUBLICKEY, ERR_R_EC_LIB);
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OPENSSL_free(*out);
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*out = NULL;
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return 0;
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}
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return buf_len;
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}
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