1326 lines
39 KiB
C
1326 lines
39 KiB
C
/*
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* Copyright 2002-2020 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <string.h>
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#include "ec_local.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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#include "internal/nelem.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;
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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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/* Find the last non-zero element of group->poly[] */
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for (i = 0;
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i < (int)OSSL_NELEM(group->poly) && group->poly[i] != 0;
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i++)
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continue;
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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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#ifndef OPENSSL_NO_EC2M
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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_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
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NID_X9_62_characteristic_two_field
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|| !((group->poly[0] != 0) && (group->poly[1] != 0)
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&& (group->poly[2] == 0))) {
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ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS,
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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_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
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NID_X9_62_characteristic_two_field
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|| !((group->poly[0] != 0) && (group->poly[1] != 0)
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&& (group->poly[2] != 0) && (group->poly[3] != 0)
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&& (group->poly[4] == 0))) {
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ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS,
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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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#endif
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/* some structures needed for the asn1 encoding */
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typedef struct x9_62_pentanomial_st {
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int32_t k1;
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int32_t k2;
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int32_t k3;
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} X9_62_PENTANOMIAL;
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typedef struct x9_62_characteristic_two_st {
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int32_t m;
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ASN1_OBJECT *type;
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union {
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char *ptr;
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/* NID_X9_62_onBasis */
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ASN1_NULL *onBasis;
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/* NID_X9_62_tpBasis */
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ASN1_INTEGER *tpBasis;
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/* NID_X9_62_ppBasis */
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X9_62_PENTANOMIAL *ppBasis;
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/* anything else */
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ASN1_TYPE *other;
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} p;
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} X9_62_CHARACTERISTIC_TWO;
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typedef struct x9_62_fieldid_st {
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ASN1_OBJECT *fieldType;
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union {
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char *ptr;
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/* NID_X9_62_prime_field */
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ASN1_INTEGER *prime;
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/* NID_X9_62_characteristic_two_field */
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X9_62_CHARACTERISTIC_TWO *char_two;
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/* anything else */
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ASN1_TYPE *other;
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} p;
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} X9_62_FIELDID;
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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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struct ec_parameters_st {
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int32_t 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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typedef enum {
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ECPKPARAMETERS_TYPE_NAMED = 0,
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ECPKPARAMETERS_TYPE_EXPLICIT,
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ECPKPARAMETERS_TYPE_IMPLICIT
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} ecpk_parameters_type_t;
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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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int32_t 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 ASN.1 definitions */
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ASN1_SEQUENCE(X9_62_PENTANOMIAL) = {
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ASN1_EMBED(X9_62_PENTANOMIAL, k1, INT32),
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ASN1_EMBED(X9_62_PENTANOMIAL, k2, INT32),
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ASN1_EMBED(X9_62_PENTANOMIAL, k3, INT32)
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} static_ASN1_SEQUENCE_END(X9_62_PENTANOMIAL)
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DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
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IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
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ASN1_ADB_TEMPLATE(char_two_def) = ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.other, ASN1_ANY);
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ASN1_ADB(X9_62_CHARACTERISTIC_TWO) = {
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ADB_ENTRY(NID_X9_62_onBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.onBasis, ASN1_NULL)),
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ADB_ENTRY(NID_X9_62_tpBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.tpBasis, ASN1_INTEGER)),
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ADB_ENTRY(NID_X9_62_ppBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.ppBasis, X9_62_PENTANOMIAL))
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} ASN1_ADB_END(X9_62_CHARACTERISTIC_TWO, 0, type, 0, &char_two_def_tt, NULL);
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ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO) = {
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ASN1_EMBED(X9_62_CHARACTERISTIC_TWO, m, INT32),
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ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, type, ASN1_OBJECT),
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ASN1_ADB_OBJECT(X9_62_CHARACTERISTIC_TWO)
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} static_ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO)
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DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
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IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
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ASN1_ADB_TEMPLATE(fieldID_def) = ASN1_SIMPLE(X9_62_FIELDID, p.other, ASN1_ANY);
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ASN1_ADB(X9_62_FIELDID) = {
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ADB_ENTRY(NID_X9_62_prime_field, ASN1_SIMPLE(X9_62_FIELDID, p.prime, ASN1_INTEGER)),
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ADB_ENTRY(NID_X9_62_characteristic_two_field, ASN1_SIMPLE(X9_62_FIELDID, p.char_two, X9_62_CHARACTERISTIC_TWO))
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} ASN1_ADB_END(X9_62_FIELDID, 0, fieldType, 0, &fieldID_def_tt, NULL);
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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_ADB_OBJECT(X9_62_FIELDID)
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} static_ASN1_SEQUENCE_END(X9_62_FIELDID)
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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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} static_ASN1_SEQUENCE_END(X9_62_CURVE)
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ASN1_SEQUENCE(ECPARAMETERS) = {
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ASN1_EMBED(ECPARAMETERS, version, INT32),
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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_OPT(ECPARAMETERS, cofactor, ASN1_INTEGER)
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} ASN1_SEQUENCE_END(ECPARAMETERS)
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DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
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IMPLEMENT_ASN1_ALLOC_FUNCTIONS(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_EMBED(EC_PRIVATEKEY, version, INT32),
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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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} static_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() sets the values in a X9_62_FIELDID object */
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static int ec_asn1_group2fieldid(const EC_GROUP *, X9_62_FIELDID *);
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/* ec_asn1_group2curve() sets the values in a X9_62_CURVE object */
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static int ec_asn1_group2curve(const EC_GROUP *, X9_62_CURVE *);
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/* the function definitions */
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static int ec_asn1_group2fieldid(const EC_GROUP *group, X9_62_FIELDID *field)
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{
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int ok = 0, nid;
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BIGNUM *tmp = NULL;
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if (group == NULL || field == NULL)
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return 0;
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/* clear the old values (if necessary) */
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ASN1_OBJECT_free(field->fieldType);
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ASN1_TYPE_free(field->p.other);
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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 ((field->fieldType = OBJ_nid2obj(nid)) == NULL) {
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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 (nid == NID_X9_62_prime_field) {
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if ((tmp = BN_new()) == NULL) {
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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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if (!EC_GROUP_get_curve(group, tmp, NULL, NULL, NULL)) {
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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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field->p.prime = BN_to_ASN1_INTEGER(tmp, NULL);
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if (field->p.prime == NULL) {
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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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} else if (nid == NID_X9_62_characteristic_two_field)
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#ifdef OPENSSL_NO_EC2M
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{
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ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_GF2M_NOT_SUPPORTED);
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goto err;
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}
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#else
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{
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int field_type;
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X9_62_CHARACTERISTIC_TWO *char_two;
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field->p.char_two = X9_62_CHARACTERISTIC_TWO_new();
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char_two = field->p.char_two;
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if (char_two == NULL) {
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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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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->type = OBJ_nid2obj(field_type)) == NULL) {
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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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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->p.tpBasis = ASN1_INTEGER_new();
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if (char_two->p.tpBasis == NULL) {
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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 (!ASN1_INTEGER_set(char_two->p.tpBasis, (long)k)) {
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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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} else if (field_type == NID_X9_62_ppBasis) {
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unsigned int k1, k2, k3;
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if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3))
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goto err;
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char_two->p.ppBasis = X9_62_PENTANOMIAL_new();
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if (char_two->p.ppBasis == NULL) {
|
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ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
|
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goto err;
|
|
}
|
|
|
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/* set k? values */
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char_two->p.ppBasis->k1 = (long)k1;
|
|
char_two->p.ppBasis->k2 = (long)k2;
|
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char_two->p.ppBasis->k3 = (long)k3;
|
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} else { /* field_type == NID_X9_62_onBasis */
|
|
|
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/* for ONB the parameters are (asn1) NULL */
|
|
char_two->p.onBasis = ASN1_NULL_new();
|
|
if (char_two->p.onBasis == NULL) {
|
|
ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
else {
|
|
ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_UNSUPPORTED_FIELD);
|
|
goto err;
|
|
}
|
|
|
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ok = 1;
|
|
|
|
err:
|
|
BN_free(tmp);
|
|
return ok;
|
|
}
|
|
|
|
static int ec_asn1_group2curve(const EC_GROUP *group, X9_62_CURVE *curve)
|
|
{
|
|
int ok = 0;
|
|
BIGNUM *tmp_1 = NULL, *tmp_2 = NULL;
|
|
unsigned char *a_buf = NULL, *b_buf = NULL;
|
|
size_t len;
|
|
|
|
if (!group || !curve || !curve->a || !curve->b)
|
|
return 0;
|
|
|
|
if ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL) {
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
/* get a and b */
|
|
if (!EC_GROUP_get_curve(group, NULL, tmp_1, tmp_2, NULL)) {
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Per SEC 1, the curve coefficients must be padded up to size. See C.2's
|
|
* definition of Curve, C.1's definition of FieldElement, and 2.3.5's
|
|
* definition of how to encode the field elements.
|
|
*/
|
|
len = ((size_t)EC_GROUP_get_degree(group) + 7) / 8;
|
|
if ((a_buf = OPENSSL_malloc(len)) == NULL
|
|
|| (b_buf = OPENSSL_malloc(len)) == NULL) {
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
if (BN_bn2binpad(tmp_1, a_buf, len) < 0
|
|
|| BN_bn2binpad(tmp_2, b_buf, len) < 0) {
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* set a and b */
|
|
if (!ASN1_OCTET_STRING_set(curve->a, a_buf, len)
|
|
|| !ASN1_OCTET_STRING_set(curve->b, b_buf, len)) {
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* set the seed (optional) */
|
|
if (group->seed) {
|
|
if (!curve->seed)
|
|
if ((curve->seed = ASN1_BIT_STRING_new()) == NULL) {
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
curve->seed->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
|
|
curve->seed->flags |= ASN1_STRING_FLAG_BITS_LEFT;
|
|
if (!ASN1_BIT_STRING_set(curve->seed, group->seed,
|
|
(int)group->seed_len)) {
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
} else {
|
|
ASN1_BIT_STRING_free(curve->seed);
|
|
curve->seed = NULL;
|
|
}
|
|
|
|
ok = 1;
|
|
|
|
err:
|
|
OPENSSL_free(a_buf);
|
|
OPENSSL_free(b_buf);
|
|
BN_free(tmp_1);
|
|
BN_free(tmp_2);
|
|
return ok;
|
|
}
|
|
|
|
ECPARAMETERS *EC_GROUP_get_ecparameters(const EC_GROUP *group,
|
|
ECPARAMETERS *params)
|
|
{
|
|
size_t len = 0;
|
|
ECPARAMETERS *ret = NULL;
|
|
const BIGNUM *tmp;
|
|
unsigned char *buffer = NULL;
|
|
const EC_POINT *point = NULL;
|
|
point_conversion_form_t form;
|
|
ASN1_INTEGER *orig;
|
|
|
|
if (params == NULL) {
|
|
if ((ret = ECPARAMETERS_new()) == NULL) {
|
|
ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
} else
|
|
ret = params;
|
|
|
|
/* set the version (always one) */
|
|
ret->version = (long)0x1;
|
|
|
|
/* set the fieldID */
|
|
if (!ec_asn1_group2fieldid(group, ret->fieldID)) {
|
|
ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* set the curve */
|
|
if (!ec_asn1_group2curve(group, ret->curve)) {
|
|
ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* set the base point */
|
|
if ((point = EC_GROUP_get0_generator(group)) == NULL) {
|
|
ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, EC_R_UNDEFINED_GENERATOR);
|
|
goto err;
|
|
}
|
|
|
|
form = EC_GROUP_get_point_conversion_form(group);
|
|
|
|
len = EC_POINT_point2buf(group, point, form, &buffer, NULL);
|
|
if (len == 0) {
|
|
ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL) {
|
|
OPENSSL_free(buffer);
|
|
ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
ASN1_STRING_set0(ret->base, buffer, len);
|
|
|
|
/* set the order */
|
|
tmp = EC_GROUP_get0_order(group);
|
|
if (tmp == NULL) {
|
|
ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
ret->order = BN_to_ASN1_INTEGER(tmp, orig = ret->order);
|
|
if (ret->order == NULL) {
|
|
ret->order = orig;
|
|
ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* set the cofactor (optional) */
|
|
tmp = EC_GROUP_get0_cofactor(group);
|
|
if (tmp != NULL) {
|
|
ret->cofactor = BN_to_ASN1_INTEGER(tmp, orig = ret->cofactor);
|
|
if (ret->cofactor == NULL) {
|
|
ret->cofactor = orig;
|
|
ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
|
|
err:
|
|
if (params == NULL)
|
|
ECPARAMETERS_free(ret);
|
|
return NULL;
|
|
}
|
|
|
|
ECPKPARAMETERS *EC_GROUP_get_ecpkparameters(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_GROUP_GET_ECPKPARAMETERS, ERR_R_MALLOC_FAILURE);
|
|
return NULL;
|
|
}
|
|
} else {
|
|
if (ret->type == ECPKPARAMETERS_TYPE_NAMED)
|
|
ASN1_OBJECT_free(ret->value.named_curve);
|
|
else if (ret->type == ECPKPARAMETERS_TYPE_EXPLICIT
|
|
&& ret->value.parameters != NULL)
|
|
ECPARAMETERS_free(ret->value.parameters);
|
|
}
|
|
|
|
if (EC_GROUP_get_asn1_flag(group)) {
|
|
/*
|
|
* use the asn1 OID to describe the elliptic curve parameters
|
|
*/
|
|
tmp = EC_GROUP_get_curve_name(group);
|
|
if (tmp) {
|
|
ASN1_OBJECT *asn1obj = OBJ_nid2obj(tmp);
|
|
|
|
if (asn1obj == NULL || OBJ_length(asn1obj) == 0) {
|
|
ASN1_OBJECT_free(asn1obj);
|
|
ECerr(EC_F_EC_GROUP_GET_ECPKPARAMETERS, EC_R_MISSING_OID);
|
|
ok = 0;
|
|
} else {
|
|
ret->type = ECPKPARAMETERS_TYPE_NAMED;
|
|
ret->value.named_curve = asn1obj;
|
|
}
|
|
} else
|
|
/* we don't know the nid => ERROR */
|
|
ok = 0;
|
|
} else {
|
|
/* use the ECPARAMETERS structure */
|
|
ret->type = ECPKPARAMETERS_TYPE_EXPLICIT;
|
|
if ((ret->value.parameters =
|
|
EC_GROUP_get_ecparameters(group, NULL)) == NULL)
|
|
ok = 0;
|
|
}
|
|
|
|
if (!ok) {
|
|
ECPKPARAMETERS_free(ret);
|
|
return NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
EC_GROUP *EC_GROUP_new_from_ecparameters(const ECPARAMETERS *params)
|
|
{
|
|
int ok = 0, tmp;
|
|
EC_GROUP *ret = NULL, *dup = NULL;
|
|
BIGNUM *p = NULL, *a = NULL, *b = NULL;
|
|
EC_POINT *point = NULL;
|
|
long field_bits;
|
|
int curve_name = NID_undef;
|
|
BN_CTX *ctx = NULL;
|
|
|
|
if (!params->fieldID || !params->fieldID->fieldType ||
|
|
!params->fieldID->p.ptr) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Now extract the curve parameters a and b. Note that, although SEC 1
|
|
* specifies the length of their encodings, historical versions of OpenSSL
|
|
* encoded them incorrectly, so we must accept any length for backwards
|
|
* compatibility.
|
|
*/
|
|
if (!params->curve || !params->curve->a ||
|
|
!params->curve->a->data || !params->curve->b ||
|
|
!params->curve->b->data) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, 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_GROUP_NEW_FROM_ECPARAMETERS, 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_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* get the field parameters */
|
|
tmp = OBJ_obj2nid(params->fieldID->fieldType);
|
|
if (tmp == NID_X9_62_characteristic_two_field)
|
|
#ifdef OPENSSL_NO_EC2M
|
|
{
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_GF2M_NOT_SUPPORTED);
|
|
goto err;
|
|
}
|
|
#else
|
|
{
|
|
X9_62_CHARACTERISTIC_TWO *char_two;
|
|
|
|
char_two = params->fieldID->p.char_two;
|
|
|
|
field_bits = char_two->m;
|
|
if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_FIELD_TOO_LARGE);
|
|
goto err;
|
|
}
|
|
|
|
if ((p = BN_new()) == NULL) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
/* get the base type */
|
|
tmp = OBJ_obj2nid(char_two->type);
|
|
|
|
if (tmp == NID_X9_62_tpBasis) {
|
|
long tmp_long;
|
|
|
|
if (!char_two->p.tpBasis) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis);
|
|
|
|
if (!(char_two->m > tmp_long && tmp_long > 0)) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS,
|
|
EC_R_INVALID_TRINOMIAL_BASIS);
|
|
goto err;
|
|
}
|
|
|
|
/* 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) {
|
|
X9_62_PENTANOMIAL *penta;
|
|
|
|
penta = char_two->p.ppBasis;
|
|
if (!penta) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
if (!
|
|
(char_two->m > penta->k3 && penta->k3 > penta->k2
|
|
&& penta->k2 > penta->k1 && penta->k1 > 0)) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS,
|
|
EC_R_INVALID_PENTANOMIAL_BASIS);
|
|
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_GROUP_NEW_FROM_ECPARAMETERS, EC_R_NOT_IMPLEMENTED);
|
|
goto err;
|
|
} else { /* error */
|
|
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
/* create the EC_GROUP structure */
|
|
ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL);
|
|
}
|
|
#endif
|
|
else if (tmp == NID_X9_62_prime_field) {
|
|
/* we have a curve over a prime field */
|
|
/* extract the prime number */
|
|
if (!params->fieldID->p.prime) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL);
|
|
if (p == NULL) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
|
|
if (BN_is_negative(p) || BN_is_zero(p)) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_FIELD);
|
|
goto err;
|
|
}
|
|
|
|
field_bits = BN_num_bits(p);
|
|
if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_FIELD_TOO_LARGE);
|
|
goto err;
|
|
}
|
|
|
|
/* create the EC_GROUP structure */
|
|
ret = EC_GROUP_new_curve_GFp(p, a, b, NULL);
|
|
} else {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_FIELD);
|
|
goto err;
|
|
}
|
|
|
|
if (ret == NULL) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* extract seed (optional) */
|
|
if (params->curve->seed != NULL) {
|
|
OPENSSL_free(ret->seed);
|
|
if ((ret->seed = OPENSSL_malloc(params->curve->seed->length)) == NULL) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
memcpy(ret->seed, params->curve->seed->data,
|
|
params->curve->seed->length);
|
|
ret->seed_len = params->curve->seed->length;
|
|
}
|
|
|
|
if (!params->order || !params->base || !params->base->data) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
if ((point = EC_POINT_new(ret)) == NULL)
|
|
goto err;
|
|
|
|
/* set the point conversion form */
|
|
EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t)
|
|
(params->base->data[0] & ~0x01));
|
|
|
|
/* extract the ec point */
|
|
if (!EC_POINT_oct2point(ret, point, params->base->data,
|
|
params->base->length, NULL)) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* extract the order */
|
|
if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
if (BN_is_negative(a) || BN_is_zero(a)) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_GROUP_ORDER);
|
|
goto err;
|
|
}
|
|
if (BN_num_bits(a) > (int)field_bits + 1) { /* Hasse bound */
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_GROUP_ORDER);
|
|
goto err;
|
|
}
|
|
|
|
/* extract the cofactor (optional) */
|
|
if (params->cofactor == NULL) {
|
|
BN_free(b);
|
|
b = NULL;
|
|
} else if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
/* set the generator, order and cofactor (if present) */
|
|
if (!EC_GROUP_set_generator(ret, point, a, b)) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Check if the explicit parameters group just created matches one of the
|
|
* built-in curves.
|
|
*
|
|
* We create a copy of the group just built, so that we can remove optional
|
|
* fields for the lookup: we do this to avoid the possibility that one of
|
|
* the optional parameters is used to force the library into using a less
|
|
* performant and less secure EC_METHOD instead of the specialized one.
|
|
* In any case, `seed` is not really used in any computation, while a
|
|
* cofactor different from the one in the built-in table is just
|
|
* mathematically wrong anyway and should not be used.
|
|
*/
|
|
if ((ctx = BN_CTX_new()) == NULL) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
if ((dup = EC_GROUP_dup(ret)) == NULL
|
|
|| EC_GROUP_set_seed(dup, NULL, 0) != 1
|
|
|| !EC_GROUP_set_generator(dup, point, a, NULL)) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
if ((curve_name = ec_curve_nid_from_params(dup, ctx)) != NID_undef) {
|
|
/*
|
|
* The input explicit parameters successfully matched one of the
|
|
* built-in curves: often for built-in curves we have specialized
|
|
* methods with better performance and hardening.
|
|
*
|
|
* In this case we replace the `EC_GROUP` created through explicit
|
|
* parameters with one created from a named group.
|
|
*/
|
|
EC_GROUP *named_group = NULL;
|
|
|
|
#ifndef OPENSSL_NO_EC_NISTP_64_GCC_128
|
|
/*
|
|
* NID_wap_wsg_idm_ecid_wtls12 and NID_secp224r1 are both aliases for
|
|
* the same curve, we prefer the SECP nid when matching explicit
|
|
* parameters as that is associated with a specialized EC_METHOD.
|
|
*/
|
|
if (curve_name == NID_wap_wsg_idm_ecid_wtls12)
|
|
curve_name = NID_secp224r1;
|
|
#endif /* !def(OPENSSL_NO_EC_NISTP_64_GCC_128) */
|
|
|
|
if ((named_group = EC_GROUP_new_by_curve_name(curve_name)) == NULL) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
EC_GROUP_free(ret);
|
|
ret = named_group;
|
|
|
|
/*
|
|
* Set the flag so that EC_GROUPs created from explicit parameters are
|
|
* serialized using explicit parameters by default.
|
|
*/
|
|
EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_EXPLICIT_CURVE);
|
|
|
|
/*
|
|
* If the input params do not contain the optional seed field we make
|
|
* sure it is not added to the returned group.
|
|
*
|
|
* The seed field is not really used inside libcrypto anyway, and
|
|
* adding it to parsed explicit parameter keys would alter their DER
|
|
* encoding output (because of the extra field) which could impact
|
|
* applications fingerprinting keys by their DER encoding.
|
|
*/
|
|
if (params->curve->seed == NULL) {
|
|
if (EC_GROUP_set_seed(ret, NULL, 0) != 1)
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
ok = 1;
|
|
|
|
err:
|
|
if (!ok) {
|
|
EC_GROUP_free(ret);
|
|
ret = NULL;
|
|
}
|
|
EC_GROUP_free(dup);
|
|
|
|
BN_free(p);
|
|
BN_free(a);
|
|
BN_free(b);
|
|
EC_POINT_free(point);
|
|
|
|
BN_CTX_free(ctx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
EC_GROUP *EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS *params)
|
|
{
|
|
EC_GROUP *ret = NULL;
|
|
int tmp = 0;
|
|
|
|
if (params == NULL) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, EC_R_MISSING_PARAMETERS);
|
|
return NULL;
|
|
}
|
|
|
|
if (params->type == ECPKPARAMETERS_TYPE_NAMED) {
|
|
/* the curve is given by an OID */
|
|
tmp = OBJ_obj2nid(params->value.named_curve);
|
|
if ((ret = EC_GROUP_new_by_curve_name(tmp)) == NULL) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS,
|
|
EC_R_EC_GROUP_NEW_BY_NAME_FAILURE);
|
|
return NULL;
|
|
}
|
|
EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE);
|
|
} else if (params->type == ECPKPARAMETERS_TYPE_EXPLICIT) {
|
|
/* the parameters are given by an ECPARAMETERS structure */
|
|
ret = EC_GROUP_new_from_ecparameters(params->value.parameters);
|
|
if (!ret) {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, ERR_R_EC_LIB);
|
|
return NULL;
|
|
}
|
|
EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_EXPLICIT_CURVE);
|
|
} else if (params->type == ECPKPARAMETERS_TYPE_IMPLICIT) {
|
|
/* implicit parameters inherited from CA - unsupported */
|
|
return NULL;
|
|
} else {
|
|
ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, 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;
|
|
const unsigned char *p = *in;
|
|
|
|
if ((params = d2i_ECPKPARAMETERS(NULL, &p, len)) == NULL) {
|
|
ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE);
|
|
ECPKPARAMETERS_free(params);
|
|
return NULL;
|
|
}
|
|
|
|
if ((group = EC_GROUP_new_from_ecpkparameters(params)) == NULL) {
|
|
ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE);
|
|
ECPKPARAMETERS_free(params);
|
|
return NULL;
|
|
}
|
|
|
|
if (params->type == ECPKPARAMETERS_TYPE_EXPLICIT)
|
|
group->decoded_from_explicit_params = 1;
|
|
|
|
if (a) {
|
|
EC_GROUP_free(*a);
|
|
*a = group;
|
|
}
|
|
|
|
ECPKPARAMETERS_free(params);
|
|
*in = p;
|
|
return group;
|
|
}
|
|
|
|
int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out)
|
|
{
|
|
int ret = 0;
|
|
ECPKPARAMETERS *tmp = EC_GROUP_get_ecpkparameters(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)
|
|
{
|
|
EC_KEY *ret = NULL;
|
|
EC_PRIVATEKEY *priv_key = NULL;
|
|
const unsigned char *p = *in;
|
|
|
|
if ((priv_key = d2i_EC_PRIVATEKEY(NULL, &p, len)) == NULL) {
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
return NULL;
|
|
}
|
|
|
|
if (a == NULL || *a == NULL) {
|
|
if ((ret = EC_KEY_new()) == NULL) {
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
} else
|
|
ret = *a;
|
|
|
|
if (priv_key->parameters) {
|
|
EC_GROUP_free(ret->group);
|
|
ret->group = EC_GROUP_new_from_ecpkparameters(priv_key->parameters);
|
|
if (ret->group != NULL
|
|
&& priv_key->parameters->type == ECPKPARAMETERS_TYPE_EXPLICIT)
|
|
ret->group->decoded_from_explicit_params = 1;
|
|
}
|
|
|
|
if (ret->group == NULL) {
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
ret->version = priv_key->version;
|
|
|
|
if (priv_key->privateKey) {
|
|
ASN1_OCTET_STRING *pkey = priv_key->privateKey;
|
|
if (EC_KEY_oct2priv(ret, ASN1_STRING_get0_data(pkey),
|
|
ASN1_STRING_length(pkey)) == 0)
|
|
goto err;
|
|
} else {
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_MISSING_PRIVATE_KEY);
|
|
goto err;
|
|
}
|
|
|
|
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 (priv_key->publicKey) {
|
|
const unsigned char *pub_oct;
|
|
int pub_oct_len;
|
|
|
|
pub_oct = ASN1_STRING_get0_data(priv_key->publicKey);
|
|
pub_oct_len = ASN1_STRING_length(priv_key->publicKey);
|
|
if (!EC_KEY_oct2key(ret, pub_oct, pub_oct_len, NULL)) {
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
} else {
|
|
if (ret->group->meth->keygenpub == NULL
|
|
|| ret->group->meth->keygenpub(ret) == 0)
|
|
goto err;
|
|
/* Remember the original private-key-only encoding. */
|
|
ret->enc_flag |= EC_PKEY_NO_PUBKEY;
|
|
}
|
|
|
|
if (a)
|
|
*a = ret;
|
|
EC_PRIVATEKEY_free(priv_key);
|
|
*in = p;
|
|
return ret;
|
|
|
|
err:
|
|
if (a == NULL || *a != ret)
|
|
EC_KEY_free(ret);
|
|
EC_PRIVATEKEY_free(priv_key);
|
|
return NULL;
|
|
}
|
|
|
|
int i2d_ECPrivateKey(EC_KEY *a, unsigned char **out)
|
|
{
|
|
int ret = 0, ok = 0;
|
|
unsigned char *priv= NULL, *pub= NULL;
|
|
size_t privlen = 0, publen = 0;
|
|
|
|
EC_PRIVATEKEY *priv_key = NULL;
|
|
|
|
if (a == NULL || a->group == NULL ||
|
|
(!(a->enc_flag & EC_PKEY_NO_PUBKEY) && a->pub_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;
|
|
|
|
privlen = EC_KEY_priv2buf(a, &priv);
|
|
|
|
if (privlen == 0) {
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
ASN1_STRING_set0(priv_key->privateKey, priv, privlen);
|
|
priv = NULL;
|
|
|
|
if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS)) {
|
|
if ((priv_key->parameters =
|
|
EC_GROUP_get_ecpkparameters(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 = ASN1_BIT_STRING_new();
|
|
if (priv_key->publicKey == NULL) {
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
publen = EC_KEY_key2buf(a, a->conv_form, &pub, NULL);
|
|
|
|
if (publen == 0) {
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
priv_key->publicKey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
|
|
priv_key->publicKey->flags |= ASN1_STRING_FLAG_BITS_LEFT;
|
|
ASN1_STRING_set0(priv_key->publicKey, pub, publen);
|
|
pub = NULL;
|
|
}
|
|
|
|
if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0) {
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
ok = 1;
|
|
err:
|
|
OPENSSL_clear_free(priv, privlen);
|
|
OPENSSL_free(pub);
|
|
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_KEY *ret;
|
|
|
|
if (in == NULL || *in == NULL) {
|
|
ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
|
|
return NULL;
|
|
}
|
|
|
|
if (a == NULL || *a == NULL) {
|
|
if ((ret = EC_KEY_new()) == NULL) {
|
|
ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
|
|
return NULL;
|
|
}
|
|
} else
|
|
ret = *a;
|
|
|
|
if (!d2i_ECPKParameters(&ret->group, in, len)) {
|
|
ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB);
|
|
if (a == NULL || *a != ret)
|
|
EC_KEY_free(ret);
|
|
return NULL;
|
|
}
|
|
|
|
if (a)
|
|
*a = ret;
|
|
|
|
return ret;
|
|
}
|
|
|
|
EC_KEY *o2i_ECPublicKey(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-structure is necessary to set the public key
|
|
*/
|
|
ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
|
|
return 0;
|
|
}
|
|
ret = *a;
|
|
if (!EC_KEY_oct2key(ret, *in, len, NULL)) {
|
|
ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_EC_LIB);
|
|
return 0;
|
|
}
|
|
*in += len;
|
|
return ret;
|
|
}
|
|
|
|
int i2o_ECPublicKey(const EC_KEY *a, unsigned char **out)
|
|
{
|
|
size_t buf_len = 0;
|
|
int new_buffer = 0;
|
|
|
|
if (a == NULL) {
|
|
ECerr(EC_F_I2O_ECPUBLICKEY, 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_I2O_ECPUBLICKEY, ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
new_buffer = 1;
|
|
}
|
|
if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form,
|
|
*out, buf_len, NULL)) {
|
|
ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_EC_LIB);
|
|
if (new_buffer) {
|
|
OPENSSL_free(*out);
|
|
*out = NULL;
|
|
}
|
|
return 0;
|
|
}
|
|
if (!new_buffer)
|
|
*out += buf_len;
|
|
return buf_len;
|
|
}
|
|
|
|
ASN1_SEQUENCE(ECDSA_SIG) = {
|
|
ASN1_SIMPLE(ECDSA_SIG, r, CBIGNUM),
|
|
ASN1_SIMPLE(ECDSA_SIG, s, CBIGNUM)
|
|
} static_ASN1_SEQUENCE_END(ECDSA_SIG)
|
|
|
|
DECLARE_ASN1_FUNCTIONS_const(ECDSA_SIG)
|
|
DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSA_SIG, ECDSA_SIG)
|
|
IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(ECDSA_SIG, ECDSA_SIG, ECDSA_SIG)
|
|
|
|
ECDSA_SIG *ECDSA_SIG_new(void)
|
|
{
|
|
ECDSA_SIG *sig = OPENSSL_zalloc(sizeof(*sig));
|
|
if (sig == NULL)
|
|
ECerr(EC_F_ECDSA_SIG_NEW, ERR_R_MALLOC_FAILURE);
|
|
return sig;
|
|
}
|
|
|
|
void ECDSA_SIG_free(ECDSA_SIG *sig)
|
|
{
|
|
if (sig == NULL)
|
|
return;
|
|
BN_clear_free(sig->r);
|
|
BN_clear_free(sig->s);
|
|
OPENSSL_free(sig);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
int ECDSA_size(const EC_KEY *r)
|
|
{
|
|
int ret, i;
|
|
ASN1_INTEGER bs;
|
|
unsigned char buf[4];
|
|
const EC_GROUP *group;
|
|
|
|
if (r == NULL)
|
|
return 0;
|
|
group = EC_KEY_get0_group(r);
|
|
if (group == NULL)
|
|
return 0;
|
|
|
|
i = EC_GROUP_order_bits(group);
|
|
if (i == 0)
|
|
return 0;
|
|
bs.length = (i + 7) / 8;
|
|
bs.data = buf;
|
|
bs.type = V_ASN1_INTEGER;
|
|
/* If the top bit is set the asn1 encoding is 1 larger. */
|
|
buf[0] = 0xff;
|
|
|
|
i = i2d_ASN1_INTEGER(&bs, NULL);
|
|
i += i; /* r and s */
|
|
ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);
|
|
if (ret < 0)
|
|
return 0;
|
|
return ret;
|
|
}
|