/************************************************* * ElGamal Header File * * (C) 1999-2007 Jack Lloyd * *************************************************/ #ifndef BOTAN_ELGAMAL_H__ #define BOTAN_ELGAMAL_H__ #include #include namespace Botan { /************************************************* * ElGamal Public Key * *************************************************/ class BOTAN_DLL ElGamal_PublicKey : public PK_Encrypting_Key, public virtual DL_Scheme_PublicKey { public: std::string algo_name() const { return "ElGamal"; } DL_Group::Format group_format() const { return DL_Group::ANSI_X9_42; } SecureVector encrypt(const byte[], u32bit, RandomNumberGenerator& rng) const; u32bit max_input_bits() const; ElGamal_PublicKey() {} ElGamal_PublicKey(const DL_Group&, const BigInt&); protected: ELG_Core core; private: void X509_load_hook(); }; /************************************************* * ElGamal Private Key * *************************************************/ class BOTAN_DLL ElGamal_PrivateKey : public ElGamal_PublicKey, public PK_Decrypting_Key, public virtual DL_Scheme_PrivateKey { public: SecureVector decrypt(const byte[], u32bit) const; bool check_key(RandomNumberGenerator& rng, bool) const; ElGamal_PrivateKey() {} ElGamal_PrivateKey(RandomNumberGenerator&, const DL_Group&, const BigInt& = 0); private: void PKCS8_load_hook(RandomNumberGenerator&, bool = false); }; } #endif