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//
// ECKeyImpl.cpp
//
//
// Library: Crypto
// Package: EC
// Module: ECKeyImpl
//
// Copyright (c) 2008, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Crypto/ECKeyImpl.h"
#include "Poco/Crypto/X509Certificate.h"
#include "Poco/Crypto/PKCS12Container.h"
#include "Poco/FileStream.h"
#include "Poco/Format.h"
#include "Poco/StreamCopier.h"
#include <sstream>
#include <openssl/evp.h>
#if OPENSSL_VERSION_NUMBER >= 0x00908000L
#include <openssl/bn.h>
#endif
namespace Poco {
namespace Crypto {
ECKeyImpl::ECKeyImpl(const EVPPKey& key):
KeyPairImpl("ec", KT_EC_IMPL),
_pEC(EVP_PKEY_get1_EC_KEY(const_cast<EVP_PKEY*>((const EVP_PKEY*)key)))
{
checkEC("ECKeyImpl(const EVPPKey&)", "EVP_PKEY_get1_EC_KEY()");
}
ECKeyImpl::ECKeyImpl(const X509Certificate& cert):
KeyPairImpl("ec", KT_EC_IMPL),
_pEC(0)
{
const X509* pCert = cert.certificate();
if (pCert)
{
EVP_PKEY* pKey = X509_get_pubkey(const_cast<X509*>(pCert));
if (pKey)
{
_pEC = EVP_PKEY_get1_EC_KEY(pKey);
EVP_PKEY_free(pKey);
checkEC("ECKeyImpl(const const X509Certificate&)", "EVP_PKEY_get1_EC_KEY()");
return;
}
}
throw OpenSSLException("ECKeyImpl(const X509Certificate&)");
}
ECKeyImpl::ECKeyImpl(const PKCS12Container& cont):
KeyPairImpl("ec", KT_EC_IMPL),
_pEC(EVP_PKEY_get1_EC_KEY(cont.getKey()))
{
checkEC("ECKeyImpl(const PKCS12Container&)", "EVP_PKEY_get1_EC_KEY()");
}
ECKeyImpl::ECKeyImpl(int curve):
KeyPairImpl("ec", KT_EC_IMPL),
_pEC(EC_KEY_new_by_curve_name(curve))
{
poco_check_ptr(_pEC);
EC_KEY_set_asn1_flag(_pEC, OPENSSL_EC_NAMED_CURVE);
if (!(EC_KEY_generate_key(_pEC)))
throw OpenSSLException("ECKeyImpl(int curve): EC_KEY_generate_key()");
checkEC("ECKeyImpl(int curve)", "EC_KEY_generate_key()");
}
ECKeyImpl::ECKeyImpl(const std::string& publicKeyFile,
const std::string& privateKeyFile,
const std::string& privateKeyPassphrase): KeyPairImpl("ec", KT_EC_IMPL), _pEC(0)
{
if (EVPPKey::loadKey(&_pEC, PEM_read_PrivateKey, EVP_PKEY_get1_EC_KEY, privateKeyFile, privateKeyPassphrase))
{
checkEC(Poco::format("ECKeyImpl(%s, %s, %s)",
publicKeyFile, privateKeyFile, privateKeyPassphrase.empty() ? privateKeyPassphrase : std::string("***")),
"PEM_read_PrivateKey() or EVP_PKEY_get1_EC_KEY()");
return; // private key is enough
}
// no private key, this must be public key only, otherwise throw
if (!EVPPKey::loadKey(&_pEC, PEM_read_PUBKEY, EVP_PKEY_get1_EC_KEY, publicKeyFile))
{
throw OpenSSLException("ECKeyImpl(const string&, const string&, const string&");
}
checkEC(Poco::format("ECKeyImpl(%s, %s, %s)",
publicKeyFile, privateKeyFile, privateKeyPassphrase.empty() ? privateKeyPassphrase : std::string("***")),
"PEM_read_PUBKEY() or EVP_PKEY_get1_EC_KEY()");
}
ECKeyImpl::ECKeyImpl(std::istream* pPublicKeyStream,
std::istream* pPrivateKeyStream,
const std::string& privateKeyPassphrase): KeyPairImpl("ec", KT_EC_IMPL), _pEC(0)
{
if (EVPPKey::loadKey(&_pEC, PEM_read_bio_PrivateKey, EVP_PKEY_get1_EC_KEY, pPrivateKeyStream, privateKeyPassphrase))
{
checkEC(Poco::format("ECKeyImpl(stream, stream, %s)",
privateKeyPassphrase.empty() ? privateKeyPassphrase : std::string("***")),
"PEM_read_bio_PrivateKey() or EVP_PKEY_get1_EC_KEY()");
return; // private key is enough
}
// no private key, this must be public key only, otherwise throw
if (!EVPPKey::loadKey(&_pEC, PEM_read_bio_PUBKEY, EVP_PKEY_get1_EC_KEY, pPublicKeyStream))
{
throw OpenSSLException("ECKeyImpl(istream*, istream*, const string&");
}
checkEC(Poco::format("ECKeyImpl(stream, stream, %s)",
privateKeyPassphrase.empty() ? privateKeyPassphrase : std::string("***")),
"PEM_read_bio_PUBKEY() or EVP_PKEY_get1_EC_KEY()");
}
ECKeyImpl::~ECKeyImpl()
{
freeEC();
}
void ECKeyImpl::checkEC(const std::string& method, const std::string& func) const
{
if (!_pEC) throw OpenSSLException(Poco::format("%s: %s", method, func));
if (!EC_KEY_check_key(_pEC))
throw OpenSSLException(Poco::format("%s: EC_KEY_check_key()", method));
}
void ECKeyImpl::freeEC()
{
if (_pEC)
{
EC_KEY_free(_pEC);
_pEC = 0;
}
}
int ECKeyImpl::size() const
{
int sz = -1;
EVP_PKEY* pKey = EVP_PKEY_new();
if (pKey && EVP_PKEY_set1_EC_KEY(pKey, _pEC))
{
sz = EVP_PKEY_bits(pKey);
EVP_PKEY_free(pKey);
return sz;
}
throw OpenSSLException("ECKeyImpl::size()");
}
int ECKeyImpl::groupId() const
{
if (_pEC)
{
const EC_GROUP* ecGroup = EC_KEY_get0_group(_pEC);
if (ecGroup)
{
return EC_GROUP_get_curve_name(ecGroup);
}
else
{
throw OpenSSLException("ECKeyImpl::groupName()");
}
}
throw NullPointerException("ECKeyImpl::groupName() => _pEC");
}
std::string ECKeyImpl::getCurveName(int nid)
{
std::string curveName;
size_t len = EC_get_builtin_curves(NULL, 0);
EC_builtin_curve* pCurves =
(EC_builtin_curve*) OPENSSL_malloc(sizeof(EC_builtin_curve) * len);
if (!pCurves) return curveName;
if (!EC_get_builtin_curves(pCurves, len))
{
OPENSSL_free(pCurves);
return curveName;
}
if (-1 == nid) nid = pCurves[0].nid;
const int bufLen = 128;
char buf[bufLen];
std::memset(buf, 0, bufLen);
OBJ_obj2txt(buf, bufLen, OBJ_nid2obj(nid), 0);
curveName = buf;
OPENSSL_free(pCurves);
return curveName;
}
int ECKeyImpl::getCurveNID(std::string& name)
{
std::string curveName;
size_t len = EC_get_builtin_curves(NULL, 0);
EC_builtin_curve* pCurves =
(EC_builtin_curve*)OPENSSL_malloc(static_cast<int>(sizeof(EC_builtin_curve) * len));
if (!pCurves) return -1;
if (!EC_get_builtin_curves(pCurves, len))
{
OPENSSL_free(pCurves);
return -1;
}
int nid = -1;
const int bufLen = 128;
char buf[bufLen];
if (name.empty())
{
std::memset(buf, 0, bufLen);
OBJ_obj2txt(buf, bufLen, OBJ_nid2obj(nid), 0);
name = buf;
nid = pCurves[0].nid;
}
else
{
for (int i = 0; i < len; ++i)
{
std::memset(buf, 0, bufLen);
OBJ_obj2txt(buf, bufLen, OBJ_nid2obj(pCurves[i].nid), 0);
if (strncmp(name.c_str(), buf, name.size() > bufLen ? bufLen : name.size()) == 0)
{
nid = pCurves[i].nid;
break;
}
}
}
OPENSSL_free(pCurves);
return nid;
}
bool ECKeyImpl::hasCurve(const std::string& name)
{
std::string tmp(name);
return (-1 != getCurveNID(tmp));
}
} } // namespace Poco::Crypto
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