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-rw-r--r--src/pubkey/ecdh/ecdh.h107
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diff --git a/src/pubkey/ecdh/ecdh.h b/src/pubkey/ecdh/ecdh.h
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--- a/src/pubkey/ecdh/ecdh.h
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-/*
-* ECDH
-* (C) 2007 Falko Strenzke, FlexSecure GmbH
-* Manuel Hartl, FlexSecure GmbH
-* (C) 2008-2010 Jack Lloyd
-*
-* Distributed under the terms of the Botan license
-*/
-
-#ifndef BOTAN_ECDH_KEY_H__
-#define BOTAN_ECDH_KEY_H__
-
-#include <botan/ecc_key.h>
-#include <botan/pk_ops.h>
-
-namespace Botan {
-
-/**
-* This class represents ECDH Public Keys.
-*/
-class BOTAN_DLL ECDH_PublicKey : public virtual EC_PublicKey
- {
- public:
-
- ECDH_PublicKey(const AlgorithmIdentifier& alg_id,
- const secure_vector<byte>& key_bits) :
- EC_PublicKey(alg_id, key_bits) {}
-
- /**
- * Construct a public key from a given public point.
- * @param dom_par the domain parameters associated with this key
- * @param public_point the public point defining this key
- */
- ECDH_PublicKey(const EC_Group& dom_par,
- const PointGFp& public_point) :
- EC_PublicKey(dom_par, public_point) {}
-
- /**
- * Get this keys algorithm name.
- * @return this keys algorithm name
- */
- std::string algo_name() const { return "ECDH"; }
-
- /**
- * Get the maximum number of bits allowed to be fed to this key.
- * This is the bitlength of the order of the base point.
-
- * @return maximum number of input bits
- */
- size_t max_input_bits() const { return domain().get_order().bits(); }
-
- /**
- * @return public point value
- */
- std::vector<byte> public_value() const
- { return unlock(EC2OSP(public_point(), PointGFp::UNCOMPRESSED)); }
-
- protected:
- ECDH_PublicKey() {}
- };
-
-/**
-* This class represents ECDH Private Keys.
-*/
-class BOTAN_DLL ECDH_PrivateKey : public ECDH_PublicKey,
- public EC_PrivateKey,
- public PK_Key_Agreement_Key
- {
- public:
-
- ECDH_PrivateKey(const AlgorithmIdentifier& alg_id,
- const secure_vector<byte>& key_bits) :
- EC_PrivateKey(alg_id, key_bits) {}
-
- /**
- * Generate a new private key
- * @param rng a random number generator
- * @param domain parameters to used for this key
- * @param x the private key; if zero, a new random key is generated
- */
- ECDH_PrivateKey(RandomNumberGenerator& rng,
- const EC_Group& domain,
- const BigInt& x = 0) :
- EC_PrivateKey(rng, domain, x) {}
-
- std::vector<byte> public_value() const
- { return ECDH_PublicKey::public_value(); }
- };
-
-/**
-* ECDH operation
-*/
-class BOTAN_DLL ECDH_KA_Operation : public PK_Ops::Key_Agreement
- {
- public:
- ECDH_KA_Operation(const ECDH_PrivateKey& key);
-
- secure_vector<byte> agree(const byte w[], size_t w_len);
- private:
- const CurveGFp& curve;
- const BigInt& cofactor;
- BigInt l_times_priv;
- };
-
-}
-
-#endif