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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.
*/
/*****************************************************************************
OSSLGOSTPublicKey.cpp
OpenSSL GOST R 34.10-2001 public key class
*****************************************************************************/
#include "config.h"
#ifdef WITH_GOST
#include "log.h"
#include "OSSLGOSTPublicKey.h"
#include <openssl/x509.h>
#include <string.h>
// the 37 bytes of prefix
const unsigned char gost_prefix[] = {
0x30, 0x63, 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,
0x03, 0x43, 0x00, 0x04, 0x40
};
// Constructors
OSSLGOSTPublicKey::OSSLGOSTPublicKey()
{
pkey = EVP_PKEY_new();
}
OSSLGOSTPublicKey::OSSLGOSTPublicKey(const EVP_PKEY* inPKEY)
{
OSSLGOSTPublicKey();
setFromOSSL(inPKEY);
}
// Destructor
OSSLGOSTPublicKey::~OSSLGOSTPublicKey()
{
EVP_PKEY_free(pkey);
}
// The type
/*static*/ const char* OSSLGOSTPublicKey::type = "OpenSSL GOST Public Key";
// Get the output length
unsigned long OSSLGOSTPublicKey::getOutputLength() const
{
return getQ().size();
}
// Set from OpenSSL representation
void OSSLGOSTPublicKey::setFromOSSL(const EVP_PKEY* pkey)
{
ByteString der;
int len = i2d_PUBKEY((EVP_PKEY*) pkey, NULL);
if (len != 37 + 64)
{
ERROR_MSG("bad GOST public key encoding length %d", len);
return;
}
der.resize(len);
unsigned char *p = &der[0];
i2d_PUBKEY((EVP_PKEY*) pkey, &p);
// can check: der is prefix + 64 bytes
setQ(der.substr(37));
ByteString inEC;
const EC_KEY* eckey = (const EC_KEY*) EVP_PKEY_get0((EVP_PKEY*) pkey);
int nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(eckey));
inEC.resize(i2d_ASN1_OBJECT(OBJ_nid2obj(nid), NULL));
p = &inEC[0];
i2d_ASN1_OBJECT(OBJ_nid2obj(nid), &p);
setEC(inEC);
}
// Check if the key is of the given type
bool OSSLGOSTPublicKey::isOfType(const char* inType)
{
return !strcmp(type, inType);
}
// Setters for the GOST public key components
void OSSLGOSTPublicKey::setEC(const ByteString& inEC)
{
GOSTPublicKey::setEC(inEC);
}
void OSSLGOSTPublicKey::setQ(const ByteString& inQ)
{
GOSTPublicKey::setQ(inQ);
if (inQ.size() != 64)
{
ERROR_MSG("bad GOST public key size %zu", q.size());
return;
}
ByteString der;
der.resize(37 + 64);
memcpy(&der[0], gost_prefix, 37);
memcpy(&der[37], inQ.const_byte_str(), 64);
const unsigned char *p = &der[0];
if (d2i_PUBKEY(&pkey, &p, (long) der.size()) == NULL)
ERROR_MSG("d2i_PUBKEY failed");
}
// Serialisation
ByteString OSSLGOSTPublicKey::serialise() const
{
return ec.serialise() +
q.serialise();
}
bool OSSLGOSTPublicKey::deserialise(ByteString& serialised)
{
ByteString dEC = ByteString::chainDeserialise(serialised);
ByteString dQ = ByteString::chainDeserialise(serialised);
if ((dEC.size() == 0) ||
(dQ.size() == 0))
{
return false;
}
setEC(dEC);
setQ(dQ);
return true;
}
// Retrieve the OpenSSL representation of the key
EVP_PKEY* OSSLGOSTPublicKey::getOSSLKey()
{
return pkey;
}
#endif
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