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Diffstat (limited to 'old/botan/build/botan/elg_op.h')
-rw-r--r-- | old/botan/build/botan/elg_op.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/old/botan/build/botan/elg_op.h b/old/botan/build/botan/elg_op.h new file mode 100644 index 0000000..39ed897 --- /dev/null +++ b/old/botan/build/botan/elg_op.h @@ -0,0 +1,52 @@ +/* +* ElGamal Operations +* (C) 1999-2008 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ + +#ifndef BOTAN_ELGAMAL_OPS_H__ +#define BOTAN_ELGAMAL_OPS_H__ + +#include <botan/pow_mod.h> +#include <botan/numthry.h> +#include <botan/reducer.h> +#include <botan/dl_group.h> + +namespace Botan { + +/* +* ElGamal Operation +*/ +class BOTAN_DLL ELG_Operation + { + public: + virtual SecureVector<byte> encrypt(const byte[], u32bit, + const BigInt&) const = 0; + virtual BigInt decrypt(const BigInt&, const BigInt&) const = 0; + virtual ELG_Operation* clone() const = 0; + virtual ~ELG_Operation() {} + }; + +/* +* Botan's Default ElGamal Operation +*/ +class BOTAN_DLL Default_ELG_Op : public ELG_Operation + { + public: + SecureVector<byte> encrypt(const byte[], u32bit, const BigInt&) const; + BigInt decrypt(const BigInt&, const BigInt&) const; + + ELG_Operation* clone() const { return new Default_ELG_Op(*this); } + + Default_ELG_Op(const DL_Group&, const BigInt&, const BigInt&); + private: + const BigInt p; + Fixed_Base_Power_Mod powermod_g_p, powermod_y_p; + Fixed_Exponent_Power_Mod powermod_x_p; + Modular_Reducer mod_p; + }; + +} + +#endif |