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+//
+// ECKeyImpl.h
+//
+//
+// Library: Crypto
+// Package: EC
+// Module:  ECKeyImpl
+//
+// Definition of the ECKeyImpl class.
+//
+// Copyright (c) 2008, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Crypto_ECKeyImplImpl_INCLUDED
+#define Crypto_ECKeyImplImpl_INCLUDED
+
+
+#include "Poco/Crypto/Crypto.h"
+#include "Poco/Crypto/EVPPKey.h"
+#include "Poco/Crypto/KeyPairImpl.h"
+#include "Poco/Crypto/OpenSSLInitializer.h"
+#include "Poco/RefCountedObject.h"
+#include "Poco/AutoPtr.h"
+#include <istream>
+#include <ostream>
+#include <vector>
+#include <openssl/objects.h>
+#include <openssl/ec.h>
+
+
+namespace Poco {
+namespace Crypto {
+
+
+class X509Certificate;
+class PKCS12Container;
+
+
+class ECKeyImpl: public KeyPairImpl
+	/// Elliptic Curve key clas implementation.
+{
+public:
+	typedef Poco::AutoPtr<ECKeyImpl> Ptr;
+	typedef std::vector<unsigned char> ByteVec;
+
+	ECKeyImpl(const EVPPKey& key);
+		/// Constructs ECKeyImpl by extracting the EC key.
+
+	ECKeyImpl(const X509Certificate& cert);
+		/// Constructs ECKeyImpl by extracting the EC public key from the given certificate.
+
+	ECKeyImpl(const PKCS12Container& cert);
+		/// Constructs ECKeyImpl by extracting the EC private key from the given certificate.
+
+	ECKeyImpl(int eccGroup);
+		/// Creates the ECKey of the specified group. Creates a new public/private keypair using the given parameters.
+		/// Can be used to sign data and verify signatures.
+
+	ECKeyImpl(const std::string& publicKeyFile, const std::string& privateKeyFile, const std::string& privateKeyPassphrase);
+		/// Creates the ECKey, by reading public and private key from the given files and
+		/// using the given passphrase for the private key. Can only by used for signing if 
+		/// a private key is available. 
+
+	ECKeyImpl(std::istream* pPublicKeyStream, std::istream* pPrivateKeyStream, const std::string& privateKeyPassphrase);
+		/// Creates the ECKey. Can only by used for signing if pPrivKey
+		/// is not null. If a private key file is specified, you don't need to
+		/// specify a public key file. OpenSSL will auto-create it from the private key.
+
+	~ECKeyImpl();
+		/// Destroys the ECKeyImpl.
+
+	EC_KEY* getECKey();
+		/// Returns the OpenSSL EC key.
+
+	const EC_KEY* getECKey() const;
+		/// Returns the OpenSSL EC key.
+
+	int size() const;
+		/// Returns the EC key length in bits.
+
+	int groupId() const;
+		/// Returns the EC key group integer Id.
+
+	std::string groupName() const;
+		/// Returns the EC key group name.
+
+	void save(const std::string& publicKeyFile,
+		const std::string& privateKeyFile = "",
+		const std::string& privateKeyPassphrase = "") const;
+		/// Exports the public and private keys to the given files. 
+		///
+		/// If an empty filename is specified, the corresponding key
+		/// is not exported.
+
+	void save(std::ostream* pPublicKeyStream,
+		std::ostream* pPrivateKeyStream = 0,
+		const std::string& privateKeyPassphrase = "") const;
+		/// Exports the public and private key to the given streams.
+		///
+		/// If a null pointer is passed for a stream, the corresponding
+		/// key is not exported.
+
+	static std::string getCurveName(int nid = -1);
+		/// Returns elliptical curve name corresponding to
+		/// the given nid; if nid is not found, returns
+		/// empty string.
+		///
+		/// If nid is -1, returns first curve name.
+		///
+		/// If no curves are found, returns empty string;
+
+	static int getCurveNID(std::string& name);
+		/// Returns the NID of the specified curve.
+		///
+		/// If name is empty, returns the first curve NID
+		/// and updates the name accordingly.
+
+	static bool hasCurve(const std::string& name);
+		/// Returns true if the named curve is found,
+		/// false otherwise.
+
+private:
+	void checkEC(const std::string& method, const std::string& func) const;
+	void freeEC();
+
+	EC_KEY* _pEC;
+};
+
+
+//
+// inlines
+//
+inline EC_KEY* ECKeyImpl::getECKey()
+{
+	return _pEC;
+}
+
+
+inline const EC_KEY* ECKeyImpl::getECKey() const
+{
+	return _pEC;
+}
+
+
+inline std::string ECKeyImpl::groupName() const
+{
+	return OBJ_nid2sn(groupId());
+}
+
+
+inline void ECKeyImpl::save(const std::string& publicKeyFile,
+	const std::string& privateKeyFile,
+	const std::string& privateKeyPassphrase) const
+{
+	EVPPKey(_pEC).save(publicKeyFile, privateKeyFile, privateKeyPassphrase);
+}
+
+
+inline void ECKeyImpl::save(std::ostream* pPublicKeyStream,
+	std::ostream* pPrivateKeyStream,
+	const std::string& privateKeyPassphrase) const
+{
+	EVPPKey(_pEC).save(pPublicKeyStream, pPrivateKeyStream, privateKeyPassphrase);
+}
+
+
+} } // namespace Poco::Crypto
+
+
+#endif // Crypto_ECKeyImplImpl_INCLUDED