00001 #ifndef CRYPTOPP_PANAMA_H
00002 #define CRYPTOPP_PANAMA_H
00003
00004 #include "strciphr.h"
00005 #include "iterhash.h"
00006
00007 NAMESPACE_BEGIN(CryptoPP)
00008
00009
00010 template <class B>
00011 class CRYPTOPP_NO_VTABLE Panama
00012 {
00013 public:
00014 void Reset();
00015 void Iterate(size_t count, const word32 *p=NULL, word32 *z=NULL, const word32 *y=NULL);
00016
00017 protected:
00018 typedef word32 Stage[8];
00019 CRYPTOPP_CONSTANT(STAGES = 32)
00020
00021 FixedSizeAlignedSecBlock<word32, 20 + 8*32> m_state;
00022 };
00023
00024 namespace Weak {
00025
00026 template <class B = LittleEndian>
00027 class PanamaHash : protected Panama<B>, public AlgorithmImpl<IteratedHash<word32, NativeByteOrder, 32>, PanamaHash<B> >
00028 {
00029 public:
00030 CRYPTOPP_CONSTANT(DIGESTSIZE = 32)
00031 PanamaHash() {Panama<B>::Reset();}
00032 unsigned int DigestSize() const {return DIGESTSIZE;}
00033 void TruncatedFinal(byte *hash, size_t size);
00034 static const char * StaticAlgorithmName() {return B::ToEnum() == BIG_ENDIAN_ORDER ? "Panama-BE" : "Panama-LE";}
00035
00036 protected:
00037 void Init() {Panama<B>::Reset();}
00038 void HashEndianCorrectedBlock(const word32 *data) {this->Iterate(1, data);}
00039 size_t HashMultipleBlocks(const word32 *input, size_t length);
00040 word32* StateBuf() {return NULL;}
00041 };
00042 }
00043
00044
00045 template <class T_Hash, class T_Info = T_Hash>
00046 class HermeticHashFunctionMAC : public AlgorithmImpl<SimpleKeyingInterfaceImpl<TwoBases<MessageAuthenticationCode, VariableKeyLength<32, 0, INT_MAX> > >, T_Info>
00047 {
00048 public:
00049 void UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs ¶ms)
00050 {
00051 m_key.Assign(key, length);
00052 Restart();
00053 }
00054
00055 void Restart()
00056 {
00057 m_hash.Restart();
00058 m_keyed = false;
00059 }
00060
00061 void Update(const byte *input, size_t length)
00062 {
00063 if (!m_keyed)
00064 KeyHash();
00065 m_hash.Update(input, length);
00066 }
00067
00068 void TruncatedFinal(byte *digest, size_t digestSize)
00069 {
00070 if (!m_keyed)
00071 KeyHash();
00072 m_hash.TruncatedFinal(digest, digestSize);
00073 m_keyed = false;
00074 }
00075
00076 unsigned int DigestSize() const
00077 {return m_hash.DigestSize();}
00078 unsigned int BlockSize() const
00079 {return m_hash.BlockSize();}
00080 unsigned int OptimalBlockSize() const
00081 {return m_hash.OptimalBlockSize();}
00082 unsigned int OptimalDataAlignment() const
00083 {return m_hash.OptimalDataAlignment();}
00084
00085 protected:
00086 void KeyHash()
00087 {
00088 m_hash.Update(m_key, m_key.size());
00089 m_keyed = true;
00090 }
00091
00092 T_Hash m_hash;
00093 bool m_keyed;
00094 SecByteBlock m_key;
00095 };
00096
00097 namespace Weak {
00098
00099 template <class B = LittleEndian>
00100 class PanamaMAC : public HermeticHashFunctionMAC<PanamaHash<B> >
00101 {
00102 public:
00103 PanamaMAC() {}
00104 PanamaMAC(const byte *key, unsigned int length)
00105 {this->SetKey(key, length);}
00106 };
00107 }
00108
00109
00110 template <class B>
00111 struct PanamaCipherInfo : public FixedKeyLength<32, SimpleKeyingInterface::UNIQUE_IV, 32>
00112 {
00113 static const char * StaticAlgorithmName() {return B::ToEnum() == BIG_ENDIAN_ORDER ? "Panama-BE" : "Panama-LE";}
00114 };
00115
00116
00117 template <class B>
00118 class PanamaCipherPolicy : public AdditiveCipherConcretePolicy<word32, 8>,
00119 public PanamaCipherInfo<B>,
00120 protected Panama<B>
00121 {
00122 protected:
00123 void CipherSetKey(const NameValuePairs ¶ms, const byte *key, size_t length);
00124 void OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount);
00125 bool CipherIsRandomAccess() const {return false;}
00126 void CipherResynchronize(byte *keystreamBuffer, const byte *iv, size_t length);
00127 #if CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X64
00128 unsigned int GetAlignment() const;
00129 #endif
00130
00131 FixedSizeSecBlock<word32, 8> m_key;
00132 };
00133
00134
00135 template <class B = LittleEndian>
00136 struct PanamaCipher : public PanamaCipherInfo<B>, public SymmetricCipherDocumentation
00137 {
00138 typedef SymmetricCipherFinal<ConcretePolicyHolder<PanamaCipherPolicy<B>, AdditiveCipherTemplate<> >, PanamaCipherInfo<B> > Encryption;
00139 typedef Encryption Decryption;
00140 };
00141
00142 NAMESPACE_END
00143
00144 #endif