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Diffstat (limited to 'src/pubkey/ecdh/ecdh.h')
-rw-r--r-- | src/pubkey/ecdh/ecdh.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/src/pubkey/ecdh/ecdh.h b/src/pubkey/ecdh/ecdh.h new file mode 100644 index 000000000..632083dcc --- /dev/null +++ b/src/pubkey/ecdh/ecdh.h @@ -0,0 +1,100 @@ +/* +* 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> + +namespace Botan { + +/** +* This class represents ECDH Public Keys. +*/ +class BOTAN_DLL ECDH_PublicKey : public virtual EC_PublicKey + { + public: + + /** + * Get this keys algorithm name. + * @result this keys algorithm name + */ + std::string algo_name() const { return "ECDH"; } + + /** + * Default constructor. Use this one if you want to later fill + * this object with data from an encoded key. + */ + ECDH_PublicKey() {} + + /** + * 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_Domain_Params& dom_par, + const PointGFp& public_point); + + /** + * Get the maximum number of bits allowed to be fed to this key. + * This is the bitlength of the order of the base point. + + * @result the maximum number of input bits + */ + u32bit max_input_bits() const { return domain().get_order().bits(); } + }; + +/** +* This class represents ECDH Private Keys. +*/ +class BOTAN_DLL ECDH_PrivateKey : public ECDH_PublicKey, + public EC_PrivateKey, + public PK_Key_Agreement_Key + { + public: + + /** + * Generate a new private key + * @param the domain parameters to used for this key + */ + ECDH_PrivateKey(RandomNumberGenerator& rng, + const EC_Domain_Params& dom_pars); + + /** + * Default constructor. Use this one if you want to later fill + * this object with data from an encoded key. + */ + ECDH_PrivateKey() {} + + MemoryVector<byte> public_value() const + { return EC2OSP(public_point(), PointGFp::UNCOMPRESSED); } + + /** + * Derive a shared key with the other parties public key. + * @param key the other partys public key + * @param key_len the other partys public key + */ + SecureVector<byte> derive_key(const byte key[], u32bit key_len) const; + + /** + * Derive a shared key with the other parties public key. + * @param other the other partys public key + */ + SecureVector<byte> derive_key(const ECDH_PublicKey& other) const; + + /** + * Derive a shared key with the other parties public key. + * @param point the public point of the other parties key + */ + SecureVector<byte> derive_key(const PointGFp& point) const; + }; + +} + +#endif |