1 files changed, 144 insertions, 0 deletions
diff --git a/CryptoPP/panama.h b/CryptoPP/panama.h
new file mode 100644
index 000000000..5a2368137
--- /dev/null
+++ b/CryptoPP/panama.h
@@ -0,0 +1,144 @@
+#ifndef CRYPTOPP_PANAMA_H
+#define CRYPTOPP_PANAMA_H
+
+#include "strciphr.h"
+#include "iterhash.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+/// base class, do not use directly
+template <class B>
+class CRYPTOPP_NO_VTABLE Panama
+{
+public:
+	void Reset();
+	void Iterate(size_t count, const word32 *p=NULL, word32 *z=NULL, const word32 *y=NULL);
+
+protected:
+	typedef word32 Stage[8];
+	CRYPTOPP_CONSTANT(STAGES = 32)
+
+	FixedSizeAlignedSecBlock<word32, 20 + 8*32> m_state;
+};
+
+namespace Weak {
+/// <a href="http://www.weidai.com/scan-mirror/md.html#Panama">Panama Hash</a>
+template <class B = LittleEndian>
+class PanamaHash : protected Panama<B>, public AlgorithmImpl<IteratedHash<word32, NativeByteOrder, 32>, PanamaHash<B> >
+{
+public:
+	CRYPTOPP_CONSTANT(DIGESTSIZE = 32)
+	PanamaHash() {Panama<B>::Reset();}
+	unsigned int DigestSize() const {return DIGESTSIZE;}
+	void TruncatedFinal(byte *hash, size_t size);
+	static const char * StaticAlgorithmName() {return B::ToEnum() == BIG_ENDIAN_ORDER ? "Panama-BE" : "Panama-LE";}
+
+protected:
+	void Init() {Panama<B>::Reset();}
+	void HashEndianCorrectedBlock(const word32 *data) {this->Iterate(1, data);}	// push
+	size_t HashMultipleBlocks(const word32 *input, size_t length);
+	word32* StateBuf() {return NULL;}
+};
+}
+
+//! MAC construction using a hermetic hash function
+template <class T_Hash, class T_Info = T_Hash>
+class HermeticHashFunctionMAC : public AlgorithmImpl<SimpleKeyingInterfaceImpl<TwoBases<MessageAuthenticationCode, VariableKeyLength<32, 0, INT_MAX> > >, T_Info>
+{
+public:
+	void UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs &params)
+	{
+		m_key.Assign(key, length);
+		Restart();
+	}
+
+	void Restart()
+	{
+		m_hash.Restart();
+		m_keyed = false;
+	}
+
+	void Update(const byte *input, size_t length)
+	{
+		if (!m_keyed)
+			KeyHash();
+		m_hash.Update(input, length);
+	}
+
+	void TruncatedFinal(byte *digest, size_t digestSize)
+	{
+		if (!m_keyed)
+			KeyHash();
+		m_hash.TruncatedFinal(digest, digestSize);
+		m_keyed = false;
+	}
+
+	unsigned int DigestSize() const
+		{return m_hash.DigestSize();}
+	unsigned int BlockSize() const
+		{return m_hash.BlockSize();}
+	unsigned int OptimalBlockSize() const
+		{return m_hash.OptimalBlockSize();}
+	unsigned int OptimalDataAlignment() const
+		{return m_hash.OptimalDataAlignment();}
+
+protected:
+	void KeyHash()
+	{
+		m_hash.Update(m_key, m_key.size());
+		m_keyed = true;
+	}
+
+	T_Hash m_hash;
+	bool m_keyed;
+	SecByteBlock m_key;
+};
+
+namespace Weak {
+/// Panama MAC
+template <class B = LittleEndian>
+class PanamaMAC : public HermeticHashFunctionMAC<PanamaHash<B> >
+{
+public:
+ 	PanamaMAC() {}
+	PanamaMAC(const byte *key, unsigned int length)
+		{this->SetKey(key, length);}
+};
+}
+
+//! algorithm info
+template <class B>
+struct PanamaCipherInfo : public FixedKeyLength<32, SimpleKeyingInterface::UNIQUE_IV, 32>
+{
+	static const char * StaticAlgorithmName() {return B::ToEnum() == BIG_ENDIAN_ORDER ? "Panama-BE" : "Panama-LE";}
+};
+
+//! _
+template <class B>
+class PanamaCipherPolicy : public AdditiveCipherConcretePolicy<word32, 8>, 
+							public PanamaCipherInfo<B>,
+							protected Panama<B>
+{
+protected:
+	void CipherSetKey(const NameValuePairs &params, const byte *key, size_t length);
+	void OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount);
+	bool CipherIsRandomAccess() const {return false;}
+	void CipherResynchronize(byte *keystreamBuffer, const byte *iv, size_t length);
+#if CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X64
+	unsigned int GetAlignment() const;
+#endif
+
+	FixedSizeSecBlock<word32, 8> m_key;
+};
+
+//! <a href="http://www.cryptolounge.org/wiki/PANAMA">Panama Stream Cipher</a>
+template <class B = LittleEndian>
+struct PanamaCipher : public PanamaCipherInfo<B>, public SymmetricCipherDocumentation
+{
+	typedef SymmetricCipherFinal<ConcretePolicyHolder<PanamaCipherPolicy<B>, AdditiveCipherTemplate<> >, PanamaCipherInfo<B> > Encryption;
+	typedef Encryption Decryption;
+};
+
+NAMESPACE_END
+
+#endif