Botan
1.11.15
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00001 /* 00002 * Nyberg-Rueppel 00003 * (C) 1999-2010 Jack Lloyd 00004 * 00005 * Botan is released under the Simplified BSD License (see license.txt) 00006 */ 00007 00008 #ifndef BOTAN_NYBERG_RUEPPEL_H__ 00009 #define BOTAN_NYBERG_RUEPPEL_H__ 00010 00011 #include <botan/dl_algo.h> 00012 00013 namespace Botan { 00014 00015 /** 00016 * Nyberg-Rueppel Public Key 00017 */ 00018 class BOTAN_DLL NR_PublicKey : public virtual DL_Scheme_PublicKey 00019 { 00020 public: 00021 std::string algo_name() const { return "NR"; } 00022 00023 DL_Group::Format group_format() const { return DL_Group::ANSI_X9_57; } 00024 00025 size_t message_parts() const { return 2; } 00026 size_t message_part_size() const { return group_q().bytes(); } 00027 size_t max_input_bits() const { return (group_q().bits() - 1); } 00028 00029 NR_PublicKey(const AlgorithmIdentifier& alg_id, 00030 const secure_vector<byte>& key_bits); 00031 00032 NR_PublicKey(const DL_Group& group, const BigInt& pub_key); 00033 protected: 00034 NR_PublicKey() {} 00035 }; 00036 00037 /** 00038 * Nyberg-Rueppel Private Key 00039 */ 00040 class BOTAN_DLL NR_PrivateKey : public NR_PublicKey, 00041 public virtual DL_Scheme_PrivateKey 00042 { 00043 public: 00044 bool check_key(RandomNumberGenerator& rng, bool strong) const; 00045 00046 NR_PrivateKey(const AlgorithmIdentifier& alg_id, 00047 const secure_vector<byte>& key_bits, 00048 RandomNumberGenerator& rng); 00049 00050 NR_PrivateKey(RandomNumberGenerator& rng, 00051 const DL_Group& group, 00052 const BigInt& x = 0); 00053 }; 00054 00055 } 00056 00057 #endif