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1460 lines
35 KiB
C
1460 lines
35 KiB
C
/* crypto/ec/ec_asn1.c */
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/*
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* Written by Nils Larsch for the OpenSSL project.
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*/
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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 <string.h>
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#include "ec_lcl.h"
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#include <openssl/err.h>
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#include <openssl/asn1t.h>
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#include <openssl/objects.h>
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int EC_GROUP_get_basis_type(const EC_GROUP *group)
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{
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int i=0;
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if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
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NID_X9_62_characteristic_two_field)
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/* everything else is currently not supported */
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return 0;
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while (group->poly[i] != 0)
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i++;
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if (i == 4)
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return NID_X9_62_ppBasis;
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else if (i == 2)
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return NID_X9_62_tpBasis;
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else
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/* everything else is currently not supported */
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return 0;
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}
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int EC_GROUP_get_trinomial_basis(const EC_GROUP *group, unsigned int *k)
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{
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if (group == NULL)
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return 0;
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if (EC_GROUP_method_of(group)->group_set_curve != ec_GF2m_simple_group_set_curve
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|| !((group->poly[0] != 0) && (group->poly[1] != 0) && (group->poly[2] == 0)))
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{
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ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
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return 0;
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}
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if (k)
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*k = group->poly[1];
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return 1;
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}
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int EC_GROUP_get_pentanomial_basis(const EC_GROUP *group, unsigned int *k1,
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unsigned int *k2, unsigned int *k3)
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{
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if (group == NULL)
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return 0;
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if (EC_GROUP_method_of(group)->group_set_curve != ec_GF2m_simple_group_set_curve
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|| !((group->poly[0] != 0) && (group->poly[1] != 0) && (group->poly[2] != 0) && (group->poly[3] != 0) && (group->poly[4] == 0)))
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{
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ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
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return 0;
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}
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if (k1)
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*k1 = group->poly[3];
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if (k2)
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*k2 = group->poly[2];
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if (k3)
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*k3 = group->poly[1];
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return 1;
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}
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/* some structures needed for the asn1 encoding */
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typedef struct x9_62_fieldid_st {
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ASN1_OBJECT *fieldType;
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ASN1_TYPE *parameters;
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} X9_62_FIELDID;
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typedef struct x9_62_characteristic_two_st {
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long m;
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ASN1_OBJECT *basis;
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ASN1_TYPE *parameters;
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} X9_62_CHARACTERISTIC_TWO;
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typedef struct x9_62_pentanomial_st {
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long k1;
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long k2;
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long k3;
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} X9_62_PENTANOMIAL;
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typedef struct x9_62_curve_st {
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ASN1_OCTET_STRING *a;
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ASN1_OCTET_STRING *b;
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ASN1_BIT_STRING *seed;
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} X9_62_CURVE;
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typedef struct ec_parameters_st {
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long version;
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X9_62_FIELDID *fieldID;
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X9_62_CURVE *curve;
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ASN1_OCTET_STRING *base;
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ASN1_INTEGER *order;
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ASN1_INTEGER *cofactor;
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} ECPARAMETERS;
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struct ecpk_parameters_st {
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int type;
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union {
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ASN1_OBJECT *named_curve;
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ECPARAMETERS *parameters;
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ASN1_NULL *implicitlyCA;
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} value;
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}/* ECPKPARAMETERS */;
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/* SEC1 ECPrivateKey */
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typedef struct ec_privatekey_st {
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long version;
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ASN1_OCTET_STRING *privateKey;
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ECPKPARAMETERS *parameters;
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ASN1_BIT_STRING *publicKey;
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} EC_PRIVATEKEY;
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/* the OpenSSL asn1 definitions */
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ASN1_SEQUENCE(X9_62_FIELDID) = {
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ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT),
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ASN1_SIMPLE(X9_62_FIELDID, parameters, ASN1_ANY)
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} ASN1_SEQUENCE_END(X9_62_FIELDID)
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DECLARE_ASN1_FUNCTIONS_const(X9_62_FIELDID)
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DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_FIELDID, X9_62_FIELDID)
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IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_FIELDID)
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ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO) = {
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ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, m, LONG),
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ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, basis, ASN1_OBJECT),
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ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, parameters, ASN1_ANY)
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} ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO)
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DECLARE_ASN1_FUNCTIONS_const(X9_62_CHARACTERISTIC_TWO)
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DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_CHARACTERISTIC_TWO, X9_62_CHARACTERISTIC_TWO)
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IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_CHARACTERISTIC_TWO)
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ASN1_SEQUENCE(X9_62_PENTANOMIAL) = {
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ASN1_SIMPLE(X9_62_PENTANOMIAL, k1, LONG),
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ASN1_SIMPLE(X9_62_PENTANOMIAL, k2, LONG),
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ASN1_SIMPLE(X9_62_PENTANOMIAL, k3, LONG)
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} ASN1_SEQUENCE_END(X9_62_PENTANOMIAL)
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DECLARE_ASN1_FUNCTIONS_const(X9_62_PENTANOMIAL)
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DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_PENTANOMIAL, X9_62_PENTANOMIAL)
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IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_PENTANOMIAL)
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ASN1_SEQUENCE(X9_62_CURVE) = {
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ASN1_SIMPLE(X9_62_CURVE, a, ASN1_OCTET_STRING),
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ASN1_SIMPLE(X9_62_CURVE, b, ASN1_OCTET_STRING),
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ASN1_OPT(X9_62_CURVE, seed, ASN1_BIT_STRING)
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} ASN1_SEQUENCE_END(X9_62_CURVE)
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DECLARE_ASN1_FUNCTIONS_const(X9_62_CURVE)
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DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_CURVE, X9_62_CURVE)
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IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_CURVE)
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ASN1_SEQUENCE(ECPARAMETERS) = {
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ASN1_SIMPLE(ECPARAMETERS, version, LONG),
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ASN1_SIMPLE(ECPARAMETERS, fieldID, X9_62_FIELDID),
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ASN1_SIMPLE(ECPARAMETERS, curve, X9_62_CURVE),
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ASN1_SIMPLE(ECPARAMETERS, base, ASN1_OCTET_STRING),
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ASN1_SIMPLE(ECPARAMETERS, order, ASN1_INTEGER),
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ASN1_SIMPLE(ECPARAMETERS, cofactor, ASN1_INTEGER)
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} ASN1_SEQUENCE_END(ECPARAMETERS)
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DECLARE_ASN1_FUNCTIONS_const(ECPARAMETERS)
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DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPARAMETERS, ECPARAMETERS)
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IMPLEMENT_ASN1_FUNCTIONS_const(ECPARAMETERS)
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ASN1_CHOICE(ECPKPARAMETERS) = {
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ASN1_SIMPLE(ECPKPARAMETERS, value.named_curve, ASN1_OBJECT),
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ASN1_SIMPLE(ECPKPARAMETERS, value.parameters, ECPARAMETERS),
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ASN1_SIMPLE(ECPKPARAMETERS, value.implicitlyCA, ASN1_NULL)
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} ASN1_CHOICE_END(ECPKPARAMETERS)
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DECLARE_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
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DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPKPARAMETERS, ECPKPARAMETERS)
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IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
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ASN1_SEQUENCE(EC_PRIVATEKEY) = {
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ASN1_SIMPLE(EC_PRIVATEKEY, version, LONG),
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ASN1_SIMPLE(EC_PRIVATEKEY, privateKey, ASN1_OCTET_STRING),
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ASN1_EXP_OPT(EC_PRIVATEKEY, parameters, ECPKPARAMETERS, 0),
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ASN1_EXP_OPT(EC_PRIVATEKEY, publicKey, ASN1_BIT_STRING, 1)
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} ASN1_SEQUENCE_END(EC_PRIVATEKEY)
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DECLARE_ASN1_FUNCTIONS_const(EC_PRIVATEKEY)
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DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PRIVATEKEY, EC_PRIVATEKEY)
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IMPLEMENT_ASN1_FUNCTIONS_const(EC_PRIVATEKEY)
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/* some declarations of internal function */
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/* ec_asn1_group2field() creates a X9_62_FIELDID object from a
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* EC_GROUP object */
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static X9_62_FIELDID *ec_asn1_group2field(const EC_GROUP *, X9_62_FIELDID *);
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/* ec_asn1_group2curve() creates a X9_62_CURVE object from a
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* EC_GROUP object */
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static X9_62_CURVE *ec_asn1_group2curve(const EC_GROUP *, X9_62_CURVE *);
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/* ec_asn1_parameters2group() creates a EC_GROUP object from a
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* ECPARAMETERS object */
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static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *);
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/* ec_asn1_group2parameters() creates a ECPARAMETERS object from a
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* EC_GROUP object */
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static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *,ECPARAMETERS *);
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/* ec_asn1_pkparameters2group() creates a EC_GROUP object from a
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* ECPKPARAMETERS object */
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static EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *);
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/* ec_asn1_group2pkparameters() creates a ECPKPARAMETERS object from a
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* EC_GROUP object */
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static ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *,
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ECPKPARAMETERS *);
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/* the function definitions */
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static X9_62_FIELDID *ec_asn1_group2field(const EC_GROUP *group,
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X9_62_FIELDID *field)
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{
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int ok=0, nid;
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X9_62_FIELDID *ret = NULL;
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X9_62_CHARACTERISTIC_TWO *char_two = NULL;
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X9_62_PENTANOMIAL *penta = NULL;
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BIGNUM *tmp = NULL;
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unsigned char *buffer = NULL;
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unsigned char *pp;
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size_t buf_len = 0;
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if (field == NULL)
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{
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if ((ret = X9_62_FIELDID_new()) == NULL)
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{
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ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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}
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else
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{
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ret = field;
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/* clear the old values */
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if (ret->fieldType != NULL)
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ASN1_OBJECT_free(ret->fieldType);
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if (ret->parameters != NULL)
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ASN1_TYPE_free(ret->parameters);
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}
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nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
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/* set OID for the field */
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if ((ret->fieldType = OBJ_nid2obj(nid)) == NULL)
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{
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ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
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goto err;
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}
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if ((ret->parameters = ASN1_TYPE_new()) == NULL)
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{
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ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (nid == NID_X9_62_prime_field)
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{
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if ((tmp = BN_new()) == NULL)
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{
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ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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/* the parameters are specified by the prime number p */
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ret->parameters->type = V_ASN1_INTEGER;
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if (!EC_GROUP_get_curve_GFp(group, tmp, NULL, NULL, NULL))
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{
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ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
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goto err;
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}
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/* set the prime number */
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ret->parameters->value.integer = BN_to_ASN1_INTEGER(tmp, NULL);
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if (ret->parameters->value.integer == NULL)
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{
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ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
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goto err;
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}
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}
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else /* nid == NID_X9_62_characteristic_two_field */
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{
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int field_type;
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char_two = X9_62_CHARACTERISTIC_TWO_new();
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if (char_two == NULL)
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{
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ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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char_two->m = (long)EC_GROUP_get_degree(group);
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field_type = EC_GROUP_get_basis_type(group);
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if (field_type == 0)
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{
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ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
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goto err;
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}
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/* set base type OID */
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if ((char_two->basis = OBJ_nid2obj(field_type)) == NULL)
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{
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ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
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goto err;
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}
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if (field_type == NID_X9_62_tpBasis)
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{
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unsigned int k;
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if (!EC_GROUP_get_trinomial_basis(group, &k))
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goto err;
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char_two->parameters->type = V_ASN1_INTEGER;
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char_two->parameters->value.integer =
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ASN1_INTEGER_new();
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if (char_two->parameters->value.integer == NULL)
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{
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ECerr(EC_F_EC_ASN1_GROUP2FIELDID,
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ERR_R_ASN1_LIB);
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goto err;
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}
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if (!ASN1_INTEGER_set(char_two->parameters->value.integer, (long)k))
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{
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ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS,
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ERR_R_ASN1_LIB);
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goto err;
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}
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}
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else if (field_type == NID_X9_62_ppBasis)
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{
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unsigned int k1, k2, k3;
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|
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if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3))
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goto err;
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|
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penta = X9_62_PENTANOMIAL_new();
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/* set k? values */
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penta->k1 = (long)k1;
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penta->k2 = (long)k2;
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penta->k3 = (long)k3;
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/* get the length of the encoded structure */
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buf_len = i2d_X9_62_PENTANOMIAL(penta, NULL);
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if ((buffer = OPENSSL_malloc(buf_len)) == NULL)
|
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{
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ECerr(EC_F_EC_ASN1_GROUP2FIELDID,
|
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ERR_R_MALLOC_FAILURE);
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goto err;
|
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}
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pp = buffer;
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i2d_X9_62_PENTANOMIAL(penta, &pp);
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/* set the encoded pentanomial */
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char_two->parameters->type=V_ASN1_SEQUENCE;
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char_two->parameters->value.sequence=ASN1_STRING_new();
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ASN1_STRING_set(char_two->parameters->value.sequence,
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buffer, buf_len);
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|
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OPENSSL_free(buffer);
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buffer = NULL;
|
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}
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else /* field_type == NID_X9_62_onBasis */
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{
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/* for ONB the parameters are (asn1) NULL */
|
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char_two->parameters->type = V_ASN1_NULL;
|
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}
|
|
/* encoded the X9_62_CHARACTERISTIC_TWO structure */
|
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buf_len = i2d_X9_62_CHARACTERISTIC_TWO(char_two, NULL);
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|
|
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if ((buffer = OPENSSL_malloc(buf_len)) == NULL)
|
|
{
|
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ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
|
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goto err;
|
|
}
|
|
pp = buffer;
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i2d_X9_62_CHARACTERISTIC_TWO(char_two, &pp);
|
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/* set the encoded parameters */
|
|
ret->parameters->type = V_ASN1_SEQUENCE;
|
|
ret->parameters->value.sequence = ASN1_STRING_new();
|
|
ASN1_STRING_set(ret->parameters->value.sequence,
|
|
buffer, buf_len);
|
|
}
|
|
|
|
ok = 1;
|
|
|
|
err : if (!ok)
|
|
{
|
|
if (ret && !field)
|
|
X9_62_FIELDID_free(ret);
|
|
ret = NULL;
|
|
}
|
|
if (tmp)
|
|
BN_free(tmp);
|
|
if (char_two)
|
|
X9_62_CHARACTERISTIC_TWO_free(char_two);
|
|
if (penta)
|
|
X9_62_PENTANOMIAL_free(penta);
|
|
if (buffer)
|
|
OPENSSL_free(buffer);
|
|
return(ret);
|
|
}
|
|
|
|
static X9_62_CURVE *ec_asn1_group2curve(const EC_GROUP *group,
|
|
X9_62_CURVE *curve)
|
|
{
|
|
int ok=0, nid;
|
|
X9_62_CURVE *ret=NULL;
|
|
BIGNUM *tmp_1=NULL,
|
|
*tmp_2=NULL;
|
|
unsigned char *buffer_1=NULL,
|
|
*buffer_2=NULL,
|
|
*a_buf=NULL,
|
|
*b_buf=NULL;
|
|
size_t len_1, len_2;
|
|
unsigned char char_zero = 0;
|
|
|
|
if ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
if (curve == NULL)
|
|
{
|
|
if ((ret = X9_62_CURVE_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ret = curve;
|
|
if (ret->a)
|
|
ASN1_OCTET_STRING_free(ret->a);
|
|
if (ret->b)
|
|
ASN1_OCTET_STRING_free(ret->b);
|
|
if (ret->seed)
|
|
ASN1_BIT_STRING_free(ret->seed);
|
|
}
|
|
|
|
nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
|
|
|
|
/* get a and b */
|
|
if (nid == NID_X9_62_prime_field)
|
|
{
|
|
if (!EC_GROUP_get_curve_GFp(group, NULL, tmp_1, tmp_2, NULL))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
else /* nid == NID_X9_62_characteristic_two_field */
|
|
{
|
|
if (!EC_GROUP_get_curve_GF2m(group, NULL, tmp_1, tmp_2, NULL))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
len_1 = (size_t)BN_num_bytes(tmp_1);
|
|
len_2 = (size_t)BN_num_bytes(tmp_2);
|
|
|
|
if (len_1 == 0)
|
|
{
|
|
/* len_1 == 0 => a == 0 */
|
|
a_buf = &char_zero;
|
|
len_1 = 1;
|
|
}
|
|
else
|
|
{
|
|
if ((buffer_1 = OPENSSL_malloc(len_1)) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
if ( (len_1 = BN_bn2bin(tmp_1, buffer_1)) == 0)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
a_buf = buffer_1;
|
|
}
|
|
|
|
if (len_2 == 0)
|
|
{
|
|
/* len_2 == 0 => b == 0 */
|
|
b_buf = &char_zero;
|
|
len_2 = 1;
|
|
}
|
|
else
|
|
{
|
|
if ((buffer_2 = OPENSSL_malloc(len_2)) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
if ( (len_2 = BN_bn2bin(tmp_2, buffer_2)) == 0)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
b_buf = buffer_2;
|
|
}
|
|
|
|
/* set a and b */
|
|
if ((ret->a = M_ASN1_OCTET_STRING_new()) == NULL ||
|
|
(ret->b = M_ASN1_OCTET_STRING_new()) == NULL )
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
if (!M_ASN1_OCTET_STRING_set(ret->a, a_buf, len_1) ||
|
|
!M_ASN1_OCTET_STRING_set(ret->b, b_buf, len_2))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* set the seed (optional) */
|
|
if (group->seed)
|
|
{
|
|
if ((ret->seed = ASN1_BIT_STRING_new()) == NULL) goto err;
|
|
if (!ASN1_BIT_STRING_set(ret->seed, group->seed,
|
|
(int)group->seed_len))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
else
|
|
ret->seed = NULL;
|
|
|
|
ok = 1;
|
|
|
|
err : if (!ok)
|
|
{
|
|
if (ret && !curve)
|
|
X9_62_CURVE_free(ret);
|
|
ret = NULL;
|
|
}
|
|
if (buffer_1)
|
|
OPENSSL_free(buffer_1);
|
|
if (buffer_2)
|
|
OPENSSL_free(buffer_2);
|
|
if (tmp_1)
|
|
BN_free(tmp_1);
|
|
if (tmp_2)
|
|
BN_free(tmp_2);
|
|
return(ret);
|
|
}
|
|
|
|
static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *group,
|
|
ECPARAMETERS *param)
|
|
{
|
|
int ok=0;
|
|
size_t len=0;
|
|
ECPARAMETERS *ret=NULL;
|
|
BIGNUM *tmp=NULL;
|
|
unsigned char *buffer=NULL;
|
|
const EC_POINT *point=NULL;
|
|
point_conversion_form_t form;
|
|
|
|
if ((tmp = BN_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
if (param == NULL)
|
|
{
|
|
if ((ret = ECPARAMETERS_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
}
|
|
else
|
|
ret = param;
|
|
|
|
/* set the version (always one) */
|
|
ret->version = (long)0x1;
|
|
|
|
/* set the fieldID */
|
|
ret->fieldID = ec_asn1_group2field(group, ret->fieldID);
|
|
if (ret->fieldID == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* set the curve */
|
|
ret->curve = ec_asn1_group2curve(group, ret->curve);
|
|
if (ret->curve == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* set the base point */
|
|
if ((point = EC_GROUP_get0_generator(group)) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, EC_R_UNDEFINED_GENERATOR);
|
|
goto err;
|
|
}
|
|
|
|
form = EC_GROUP_get_point_conversion_form(group);
|
|
|
|
len = EC_POINT_point2oct(group, point, form, NULL, len, NULL);
|
|
if (len == 0)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
if ((buffer = OPENSSL_malloc(len)) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
if (!EC_POINT_point2oct(group, point, form, buffer, len, NULL))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
if (!ASN1_OCTET_STRING_set(ret->base, buffer, len))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* set the order */
|
|
if (!EC_GROUP_get_order(group, tmp, NULL))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
ret->order = BN_to_ASN1_INTEGER(tmp, ret->order);
|
|
if (ret->order == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* set the cofactor */
|
|
if (!EC_GROUP_get_cofactor(group, tmp, NULL))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor);
|
|
if (ret->cofactor == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
|
|
ok = 1;
|
|
|
|
err : if(!ok)
|
|
{
|
|
if (ret && !param)
|
|
ECPARAMETERS_free(ret);
|
|
ret = NULL;
|
|
}
|
|
if (tmp)
|
|
BN_free(tmp);
|
|
if (buffer)
|
|
OPENSSL_free(buffer);
|
|
return(ret);
|
|
}
|
|
|
|
ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *group,
|
|
ECPKPARAMETERS *params)
|
|
{
|
|
int ok = 1, tmp;
|
|
ECPKPARAMETERS *ret = params;
|
|
|
|
if (ret == NULL)
|
|
{
|
|
if ((ret = ECPKPARAMETERS_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PKPARAMETERS,
|
|
ERR_R_MALLOC_FAILURE);
|
|
return NULL;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (ret->type == 0 && ret->value.named_curve)
|
|
ASN1_OBJECT_free(ret->value.named_curve);
|
|
else if (ret->type == 1 && ret->value.parameters)
|
|
ECPARAMETERS_free(ret->value.parameters);
|
|
}
|
|
|
|
if (EC_GROUP_get_asn1_flag(group))
|
|
{
|
|
/* use the asn1 OID to describe the
|
|
* the elliptic curve parameters
|
|
*/
|
|
tmp = EC_GROUP_get_nid(group);
|
|
if (tmp)
|
|
{
|
|
ret->type = 0;
|
|
if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL)
|
|
ok = 0;
|
|
}
|
|
else
|
|
/* we don't kmow the nid => ERROR */
|
|
ok = 0;
|
|
}
|
|
else
|
|
{
|
|
/* use the ECPARAMETERS structure */
|
|
ret->type = 1;
|
|
if ((ret->value.parameters = ec_asn1_group2parameters(
|
|
group, NULL)) == NULL)
|
|
ok = 0;
|
|
}
|
|
|
|
if (!ok)
|
|
{
|
|
ECPKPARAMETERS_free(ret);
|
|
return NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *params)
|
|
{
|
|
int ok = 0, tmp;
|
|
EC_GROUP *ret = NULL;
|
|
BIGNUM *p = NULL, *a = NULL, *b = NULL;
|
|
EC_POINT *point=NULL;
|
|
X9_62_CHARACTERISTIC_TWO *char_two = NULL;
|
|
X9_62_PENTANOMIAL *penta = NULL;
|
|
unsigned char *pp;
|
|
|
|
if (!params->fieldID || !params->fieldID->fieldType ||
|
|
!params->fieldID->parameters)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
/* now extract the curve parameters a and b */
|
|
if (!params->curve || !params->curve->a ||
|
|
!params->curve->a->data || !params->curve->b ||
|
|
!params->curve->b->data)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL);
|
|
if (a == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL);
|
|
if (b == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* get the field parameters */
|
|
tmp = OBJ_obj2nid(params->fieldID->fieldType);
|
|
|
|
if (tmp == NID_X9_62_characteristic_two_field)
|
|
{
|
|
ASN1_TYPE *parameters = params->fieldID->parameters;
|
|
|
|
if (parameters->type != V_ASN1_SEQUENCE)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
if ((p = BN_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
/* extract the X9_62_CHARACTERISTIC_TWO object */
|
|
pp = M_ASN1_STRING_data(parameters->value.sequence);
|
|
char_two = d2i_X9_62_CHARACTERISTIC_TWO(NULL,
|
|
(const unsigned char **) &pp,
|
|
M_ASN1_STRING_length(parameters->value.sequence));
|
|
if (char_two == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
/* get the base type */
|
|
tmp = OBJ_obj2nid(char_two->basis);
|
|
|
|
if (tmp == NID_X9_62_tpBasis)
|
|
{
|
|
long tmp_long;
|
|
|
|
if (char_two->parameters->type != V_ASN1_INTEGER ||
|
|
char_two->parameters->value.integer == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP,
|
|
EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
tmp_long = ASN1_INTEGER_get(char_two->parameters->value.integer);
|
|
/* create the polynomial */
|
|
if (!BN_set_bit(p, (int)char_two->m)) goto err;
|
|
if (!BN_set_bit(p, (int)tmp_long)) goto err;
|
|
if (!BN_set_bit(p, 0)) goto err;
|
|
}
|
|
else if (tmp == NID_X9_62_ppBasis)
|
|
{
|
|
if (char_two->parameters->type != V_ASN1_SEQUENCE ||
|
|
char_two->parameters->value.sequence == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP,
|
|
EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
/* extract the pentanomial data */
|
|
pp = M_ASN1_STRING_data(
|
|
char_two->parameters->value.sequence);
|
|
penta = d2i_X9_62_PENTANOMIAL(NULL,
|
|
(const unsigned char **) &pp,
|
|
M_ASN1_STRING_length(
|
|
char_two->parameters->value.sequence));
|
|
if (penta == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP,
|
|
ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
/* create the polynomial */
|
|
if (!BN_set_bit(p, (int)char_two->m)) goto err;
|
|
if (!BN_set_bit(p, (int)penta->k1)) goto err;
|
|
if (!BN_set_bit(p, (int)penta->k2)) goto err;
|
|
if (!BN_set_bit(p, (int)penta->k3)) goto err;
|
|
if (!BN_set_bit(p, 0)) goto err;
|
|
}
|
|
else if (tmp == NID_X9_62_onBasis)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP,
|
|
EC_R_NOT_IMPLEMENTED);
|
|
goto err;
|
|
}
|
|
else /* error */
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
/* create the EC_GROUP structure */
|
|
ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL);
|
|
if (ret == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
else if (tmp == NID_X9_62_prime_field)
|
|
{
|
|
/* we have a curve over a prime field */
|
|
/* extract the prime number */
|
|
if (params->fieldID->parameters->type != V_ASN1_INTEGER ||
|
|
!params->fieldID->parameters->value.integer)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
p = ASN1_INTEGER_to_BN(params->fieldID->parameters->value.integer, NULL);
|
|
if (p == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
/* create the EC_GROUP structure */
|
|
ret = EC_GROUP_new_curve_GFp(p, a, b, NULL);
|
|
if (ret == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
/* extract seed (optional) */
|
|
if (params->curve->seed != NULL)
|
|
{
|
|
if (ret->seed != NULL)
|
|
OPENSSL_free(ret->seed);
|
|
if (!(ret->seed = OPENSSL_malloc(params->curve->seed->length)))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
memcpy(ret->seed, params->curve->seed->data,
|
|
params->curve->seed->length);
|
|
ret->seed_len = params->curve->seed->length;
|
|
}
|
|
|
|
/* extract the order, cofactor and generator */
|
|
if (!params->order || !params->cofactor || !params->base ||
|
|
!params->base->data)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
if ((point = EC_POINT_new(ret)) == NULL) goto err;
|
|
|
|
a = ASN1_INTEGER_to_BN(params->order, a);
|
|
b = ASN1_INTEGER_to_BN(params->cofactor, b);
|
|
if (!a || !b)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
|
|
if (!EC_POINT_oct2point(ret, point, params->base->data,
|
|
params->base->length, NULL))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* set the point conversion form */
|
|
EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t)
|
|
(params->base->data[0] & ~0x01));
|
|
|
|
if (!EC_GROUP_set_generator(ret, point, a, b))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
ok = 1;
|
|
|
|
err: if (!ok)
|
|
{
|
|
if (ret)
|
|
EC_GROUP_clear_free(ret);
|
|
ret = NULL;
|
|
}
|
|
|
|
if (p)
|
|
BN_free(p);
|
|
if (a)
|
|
BN_free(a);
|
|
if (b)
|
|
BN_free(b);
|
|
if (point)
|
|
EC_POINT_free(point);
|
|
if (char_two)
|
|
X9_62_CHARACTERISTIC_TWO_free(char_two);
|
|
if (penta)
|
|
X9_62_PENTANOMIAL_free(penta);
|
|
return(ret);
|
|
}
|
|
|
|
EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *params)
|
|
{
|
|
EC_GROUP *ret=NULL;
|
|
int tmp=0;
|
|
|
|
if (params == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP,
|
|
EC_R_MISSING_PARAMETERS);
|
|
return NULL;
|
|
}
|
|
|
|
if (params->type == 0)
|
|
{ /* the curve is given by an OID */
|
|
tmp = OBJ_obj2nid(params->value.named_curve);
|
|
if ((ret = EC_GROUP_new_by_nid(tmp)) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP,
|
|
EC_R_EC_GROUP_NEW_BY_NAME_FAILURE);
|
|
return NULL;
|
|
}
|
|
EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE);
|
|
}
|
|
else if (params->type == 1)
|
|
{ /* the parameters are given by a ECPARAMETERS
|
|
* structure */
|
|
ret = ec_asn1_parameters2group(params->value.parameters);
|
|
if (!ret)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, ERR_R_EC_LIB);
|
|
return NULL;
|
|
}
|
|
EC_GROUP_set_asn1_flag(ret, 0x0);
|
|
}
|
|
else if (params->type == 2)
|
|
{ /* implicitlyCA */
|
|
return NULL;
|
|
}
|
|
else
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
|
|
return NULL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* EC_GROUP <-> DER encoding of ECPKPARAMETERS */
|
|
|
|
EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len)
|
|
{
|
|
EC_GROUP *group = NULL;
|
|
ECPKPARAMETERS *params = NULL;
|
|
|
|
if ((params = d2i_ECPKPARAMETERS(NULL, in, len)) == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE);
|
|
ECPKPARAMETERS_free(params);
|
|
return NULL;
|
|
}
|
|
|
|
if ((group = ec_asn1_pkparameters2group(params)) == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
if (a && *a)
|
|
EC_GROUP_clear_free(*a);
|
|
if (a)
|
|
*a = group;
|
|
|
|
ECPKPARAMETERS_free(params);
|
|
return(group);
|
|
}
|
|
|
|
int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out)
|
|
{
|
|
int ret=0;
|
|
ECPKPARAMETERS *tmp = ec_asn1_group2pkparameters(a, NULL);
|
|
if (tmp == NULL)
|
|
{
|
|
ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE);
|
|
return 0;
|
|
}
|
|
if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0)
|
|
{
|
|
ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE);
|
|
ECPKPARAMETERS_free(tmp);
|
|
return 0;
|
|
}
|
|
ECPKPARAMETERS_free(tmp);
|
|
return(ret);
|
|
}
|
|
|
|
/* some EC_KEY functions */
|
|
|
|
EC_KEY *d2i_ECPrivateKey(EC_KEY **a, const unsigned char **in, long len)
|
|
{
|
|
int ok=0;
|
|
EC_KEY *ret=NULL;
|
|
EC_PRIVATEKEY *priv_key=NULL;
|
|
|
|
if ((priv_key = EC_PRIVATEKEY_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
|
|
return NULL;
|
|
}
|
|
|
|
if ((priv_key = d2i_EC_PRIVATEKEY(&priv_key, in, len)) == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
EC_PRIVATEKEY_free(priv_key);
|
|
return NULL;
|
|
}
|
|
|
|
if (a == NULL || *a == NULL)
|
|
{
|
|
if ((ret = EC_KEY_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
if (a)
|
|
*a = ret;
|
|
}
|
|
else
|
|
ret = *a;
|
|
|
|
if (priv_key->parameters)
|
|
{
|
|
if (ret->group)
|
|
EC_GROUP_clear_free(ret->group);
|
|
ret->group = ec_asn1_pkparameters2group(priv_key->parameters);
|
|
}
|
|
|
|
if (ret->group == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
ret->version = priv_key->version;
|
|
|
|
if (priv_key->privateKey)
|
|
{
|
|
ret->priv_key = BN_bin2bn(
|
|
M_ASN1_STRING_data(priv_key->privateKey),
|
|
M_ASN1_STRING_length(priv_key->privateKey),
|
|
ret->priv_key);
|
|
if (ret->priv_key == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY,
|
|
ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY,
|
|
EC_R_MISSING_PRIVATE_KEY);
|
|
goto err;
|
|
}
|
|
|
|
if (priv_key->publicKey)
|
|
{
|
|
if (ret->pub_key)
|
|
EC_POINT_clear_free(ret->pub_key);
|
|
ret->pub_key = EC_POINT_new(ret->group);
|
|
if (ret->pub_key == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
if (!EC_POINT_oct2point(ret->group, ret->pub_key,
|
|
M_ASN1_STRING_data(priv_key->publicKey),
|
|
M_ASN1_STRING_length(priv_key->publicKey), NULL))
|
|
{
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
ok = 1;
|
|
err:
|
|
if (!ok)
|
|
{
|
|
if (ret)
|
|
EC_KEY_free(ret);
|
|
ret = NULL;
|
|
}
|
|
|
|
if (priv_key)
|
|
EC_PRIVATEKEY_free(priv_key);
|
|
|
|
return(ret);
|
|
}
|
|
|
|
int i2d_ECPrivateKey(EC_KEY *a, unsigned char **out)
|
|
{
|
|
int ret=0, ok=0;
|
|
unsigned char *buffer=NULL;
|
|
size_t buf_len=0, tmp_len;
|
|
EC_PRIVATEKEY *priv_key=NULL;
|
|
|
|
if (a == NULL || a->group == NULL || a->priv_key == NULL)
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY,
|
|
ERR_R_PASSED_NULL_PARAMETER);
|
|
goto err;
|
|
}
|
|
|
|
if ((priv_key = EC_PRIVATEKEY_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
priv_key->version = a->version;
|
|
|
|
buf_len = (size_t)BN_num_bytes(a->priv_key);
|
|
buffer = OPENSSL_malloc(buf_len);
|
|
if (buffer == NULL)
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
if (!BN_bn2bin(a->priv_key, buffer))
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
|
|
if (!M_ASN1_OCTET_STRING_set(priv_key->privateKey, buffer, buf_len))
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
|
|
if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS))
|
|
{
|
|
if ((priv_key->parameters = ec_asn1_group2pkparameters(
|
|
a->group, priv_key->parameters)) == NULL)
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
if (!(a->enc_flag & EC_PKEY_NO_PUBKEY))
|
|
{
|
|
priv_key->publicKey = M_ASN1_BIT_STRING_new();
|
|
if (priv_key->publicKey == NULL)
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
tmp_len = EC_POINT_point2oct(a->group, a->pub_key,
|
|
a->conv_form, NULL, 0, NULL);
|
|
|
|
if (tmp_len > buf_len)
|
|
buffer = OPENSSL_realloc(buffer, tmp_len);
|
|
if (buffer == NULL)
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
buf_len = tmp_len;
|
|
|
|
if (!EC_POINT_point2oct(a->group, a->pub_key,
|
|
a->conv_form, buffer, buf_len, NULL))
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
if (!M_ASN1_BIT_STRING_set(priv_key->publicKey, buffer,
|
|
buf_len))
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0)
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
ok=1;
|
|
err:
|
|
if (buffer)
|
|
OPENSSL_free(buffer);
|
|
if (priv_key)
|
|
EC_PRIVATEKEY_free(priv_key);
|
|
return(ok?ret:0);
|
|
}
|
|
|
|
int i2d_ECParameters(EC_KEY *a, unsigned char **out)
|
|
{
|
|
if (a == NULL)
|
|
{
|
|
ECerr(EC_F_I2D_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
|
|
return 0;
|
|
}
|
|
return i2d_ECPKParameters(a->group, out);
|
|
}
|
|
|
|
EC_KEY *d2i_ECParameters(EC_KEY **a, const unsigned char **in, long len)
|
|
{
|
|
EC_GROUP *group;
|
|
EC_KEY *ret;
|
|
|
|
if (in == NULL || *in == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
|
|
return NULL;
|
|
}
|
|
|
|
group = d2i_ECPKParameters(NULL, in, len);
|
|
|
|
if (group == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB);
|
|
return NULL;
|
|
}
|
|
|
|
if (a == NULL || *a == NULL)
|
|
{
|
|
if ((ret = EC_KEY_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
|
|
return NULL;
|
|
}
|
|
if (a)
|
|
*a = ret;
|
|
}
|
|
else
|
|
ret = *a;
|
|
|
|
if (ret->group)
|
|
EC_GROUP_clear_free(ret->group);
|
|
|
|
ret->group = group;
|
|
|
|
return ret;
|
|
}
|
|
|
|
EC_KEY *ECPublicKey_set_octet_string(EC_KEY **a, const unsigned char **in,
|
|
long len)
|
|
{
|
|
EC_KEY *ret=NULL;
|
|
|
|
if (a == NULL || (*a) == NULL || (*a)->group == NULL)
|
|
{
|
|
/* sorry, but a EC_GROUP-structur is necessary
|
|
* to set the public key */
|
|
ECerr(EC_F_ECPUBLICKEY_SET_OCTET, ERR_R_PASSED_NULL_PARAMETER);
|
|
return 0;
|
|
}
|
|
ret = *a;
|
|
if (ret->pub_key == NULL &&
|
|
(ret->pub_key = EC_POINT_new(ret->group)) == NULL)
|
|
{
|
|
ECerr(EC_F_ECPUBLICKEY_SET_OCTET, ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
if (!EC_POINT_oct2point(ret->group, ret->pub_key, *in, len, NULL))
|
|
{
|
|
ECerr(EC_F_ECPUBLICKEY_SET_OCTET, ERR_R_EC_LIB);
|
|
return 0;
|
|
}
|
|
/* save the point conversion form */
|
|
ret->conv_form = (point_conversion_form_t)(*in[0] & ~0x01);
|
|
return ret;
|
|
}
|
|
|
|
int ECPublicKey_get_octet_string(EC_KEY *a, unsigned char **out)
|
|
{
|
|
size_t buf_len=0;
|
|
|
|
if (a == NULL)
|
|
{
|
|
ECerr(EC_F_ECPUBLICKEY_GET_OCTET, ERR_R_PASSED_NULL_PARAMETER);
|
|
return 0;
|
|
}
|
|
|
|
buf_len = EC_POINT_point2oct(a->group, a->pub_key,
|
|
a->conv_form, NULL, 0, NULL);
|
|
|
|
if (out == NULL || buf_len == 0)
|
|
/* out == NULL => just return the length of the octet string */
|
|
return buf_len;
|
|
|
|
if (*out == NULL)
|
|
if ((*out = OPENSSL_malloc(buf_len)) == NULL)
|
|
{
|
|
ECerr(EC_F_ECPUBLICKEY_GET_OCTET,
|
|
ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form,
|
|
*out, buf_len, NULL))
|
|
{
|
|
ECerr(EC_F_ECPUBLICKEY_GET_OCTET, ERR_R_EC_LIB);
|
|
OPENSSL_free(*out);
|
|
*out = NULL;
|
|
return 0;
|
|
}
|
|
return buf_len;
|
|
}
|