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/*
* Copyright (c) 2010 SURFnet bv
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*****************************************************************************
OSSLGOSTPrivateKey.cpp
OpenSSL GOST R 34.10-2001 private key class
*****************************************************************************/
#include "config.h"
#ifdef WITH_GOST
#include "log.h"
#include "OSSLGOSTPrivateKey.h"
#include "OSSLUtil.h"
#include <string.h>
#include <openssl/x509.h>
#include <openssl/ec.h>
// DER of a private key
const unsigned char dummyKey[] = {
0x30, 0x45, 0x02, 0x01, 0x00, 0x30, 0x1c, 0x06,
0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x13, 0x30,
0x12, 0x06, 0x07, 0x2a, 0x85, 0x03, 0x02, 0x02,
0x23, 0x01, 0x06, 0x07, 0x2a, 0x85, 0x03, 0x02,
0x02, 0x1e, 0x01, 0x04, 0x22, 0x02, 0x20, 0x1b,
0x3f, 0x94, 0xf7, 0x1a, 0x5f, 0x2f, 0xe7, 0xe5,
0x74, 0x0b, 0x8c, 0xd4, 0xb7, 0x18, 0xdd, 0x65,
0x68, 0x26, 0xd1, 0x54, 0xfb, 0x77, 0xba, 0x63,
0x72, 0xd9, 0xf0, 0x63, 0x87, 0xe0, 0xd6
};
// Constructors
OSSLGOSTPrivateKey::OSSLGOSTPrivateKey()
{
pkey = EVP_PKEY_new();
}
OSSLGOSTPrivateKey::OSSLGOSTPrivateKey(const EVP_PKEY* inPKEY)
{
OSSLGOSTPrivateKey();
setFromOSSL(inPKEY);
}
// Destructor
OSSLGOSTPrivateKey::~OSSLGOSTPrivateKey()
{
EVP_PKEY_free(pkey);
}
// The type
/*static*/ const char* OSSLGOSTPrivateKey::type = "OpenSSL GOST Private Key";
// Get the output length
unsigned long OSSLGOSTPrivateKey::getOutputLength() const
{
return 64;
}
// Set from OpenSSL representation
void OSSLGOSTPrivateKey::setFromOSSL(const EVP_PKEY* pkey)
{
const EC_KEY* eckey = (const EC_KEY*) EVP_PKEY_get0((EVP_PKEY*) pkey);
const BIGNUM* priv = EC_KEY_get0_private_key(eckey);
setD(OSSL::bn2ByteString(priv));
ByteString inEC;
int nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(eckey));
inEC.resize(i2d_ASN1_OBJECT(OBJ_nid2obj(nid), NULL));
unsigned char *p = &inEC[0];
i2d_ASN1_OBJECT(OBJ_nid2obj(nid), &p);
setEC(inEC);
}
// Check if the key is of the given type
bool OSSLGOSTPrivateKey::isOfType(const char* inType)
{
return !strcmp(type, inType);
}
// Setters for the GOST private key components
void OSSLGOSTPrivateKey::setD(const ByteString& inD)
{
GOSTPrivateKey::setD(inD);
EC_KEY* inEC = (EC_KEY*) EVP_PKEY_get0((EVP_PKEY*) pkey);
if (inEC == NULL)
{
const unsigned char* p = dummyKey;
if (d2i_PrivateKey(NID_id_GostR3410_2001, &pkey, &p, (long) sizeof(dummyKey)) == NULL)
{
ERROR_MSG("d2i_PrivateKey failed");
return;
}
inEC = (EC_KEY*) EVP_PKEY_get0((EVP_PKEY*) pkey);
}
const BIGNUM* priv = OSSL::byteString2bn(inD);
if (EC_KEY_set_private_key(inEC, priv) <= 0)
{
ERROR_MSG("EC_KEY_set_private_key failed");
return;
}
BN_clear_free((BIGNUM*)priv);
#ifdef notyet
if (gost2001_compute_public(inEC) <= 0)
ERROR_MSG("gost2001_compute_public failed");
#endif
}
// Setters for the GOST public key components
void OSSLGOSTPrivateKey::setEC(const ByteString& inEC)
{
GOSTPrivateKey::setEC(inEC);
}
// Retrieve the OpenSSL representation of the key
EVP_PKEY* OSSLGOSTPrivateKey::getOSSLKey()
{
return pkey;
}
// Serialisation
ByteString OSSLGOSTPrivateKey::serialise() const
{
return ec.serialise() +
d.serialise();
}
bool OSSLGOSTPrivateKey::deserialise(ByteString& serialised)
{
ByteString dEC = ByteString::chainDeserialise(serialised);
ByteString dD = ByteString::chainDeserialise(serialised);
if ((dEC.size() == 0) ||
(dD.size() == 0))
{
return false;
}
setEC(dEC);
setD(dD);
return true;
}
// Encode into PKCS#8 DER
ByteString OSSLGOSTPrivateKey::PKCS8Encode()
{
ByteString der;
if (pkey == NULL) return der;
PKCS8_PRIV_KEY_INFO* p8inf = EVP_PKEY2PKCS8(pkey);
if (p8inf == NULL) return der;
int len = i2d_PKCS8_PRIV_KEY_INFO(p8inf, NULL);
if (len < 0)
{
PKCS8_PRIV_KEY_INFO_free(p8inf);
return der;
}
der.resize(len);
unsigned char* priv = &der[0];
int len2 = i2d_PKCS8_PRIV_KEY_INFO(p8inf, &priv);
PKCS8_PRIV_KEY_INFO_free(p8inf);
if (len2 != len) der.wipe();
return der;
}
// Decode from PKCS#8 BER
bool OSSLGOSTPrivateKey::PKCS8Decode(const ByteString& ber)
{
int len = ber.size();
if (len <= 0) return false;
const unsigned char* priv = ber.const_byte_str();
PKCS8_PRIV_KEY_INFO* p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, &priv, len);
if (p8 == NULL) return false;
EVP_PKEY* key = EVP_PKCS82PKEY(p8);
PKCS8_PRIV_KEY_INFO_free(p8);
if (key == NULL) return false;
setFromOSSL(key);
EVP_PKEY_free(key);
return true;
}
#endif
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