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authorAlexander Harkness <bearbin@gmail.com>2013-11-24 15:21:13 +0100
committerAlexander Harkness <bearbin@gmail.com>2013-11-24 15:21:13 +0100
commit3438e5d3ddf8444f0e31009ffbe8237ef3752c22 (patch)
tree7c2f76d5e9281c130e60fb932c4dda89a49863b6 /CryptoPP/dmac.h
parentMoved source to src (diff)
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Diffstat (limited to 'CryptoPP/dmac.h')
-rw-r--r--CryptoPP/dmac.h93
1 files changed, 0 insertions, 93 deletions
diff --git a/CryptoPP/dmac.h b/CryptoPP/dmac.h
deleted file mode 100644
index 80b54ac2f..000000000
--- a/CryptoPP/dmac.h
+++ /dev/null
@@ -1,93 +0,0 @@
-#ifndef CRYPTOPP_DMAC_H
-#define CRYPTOPP_DMAC_H
-
-#include "cbcmac.h"
-
-NAMESPACE_BEGIN(CryptoPP)
-
-//! _
-template <class T>
-class CRYPTOPP_NO_VTABLE DMAC_Base : public SameKeyLengthAs<T>, public MessageAuthenticationCode
-{
-public:
- static std::string StaticAlgorithmName() {return std::string("DMAC(") + T::StaticAlgorithmName() + ")";}
-
- CRYPTOPP_CONSTANT(DIGESTSIZE=T::BLOCKSIZE)
-
- DMAC_Base() {}
-
- void UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs &params);
- void Update(const byte *input, size_t length);
- void TruncatedFinal(byte *mac, size_t size);
- unsigned int DigestSize() const {return DIGESTSIZE;}
-
-private:
- byte *GenerateSubKeys(const byte *key, size_t keylength);
-
- size_t m_subkeylength;
- SecByteBlock m_subkeys;
- CBC_MAC<T> m_mac1;
- typename T::Encryption m_f2;
- unsigned int m_counter;
-};
-
-//! DMAC
-/*! Based on "CBC MAC for Real-Time Data Sources" by Erez Petrank
- and Charles Rackoff. T should be a class derived from BlockCipherDocumentation.
-*/
-template <class T>
-class DMAC : public MessageAuthenticationCodeFinal<DMAC_Base<T> >
-{
-public:
- DMAC() {}
- DMAC(const byte *key, size_t length=DMAC_Base<T>::DEFAULT_KEYLENGTH)
- {this->SetKey(key, length);}
-};
-
-template <class T>
-void DMAC_Base<T>::UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs &params)
-{
- m_subkeylength = T::StaticGetValidKeyLength(T::BLOCKSIZE);
- m_subkeys.resize(2*UnsignedMin((unsigned int)T::BLOCKSIZE, m_subkeylength));
- m_mac1.SetKey(GenerateSubKeys(key, length), m_subkeylength, params);
- m_f2.SetKey(m_subkeys+m_subkeys.size()/2, m_subkeylength, params);
- m_counter = 0;
- m_subkeys.resize(0);
-}
-
-template <class T>
-void DMAC_Base<T>::Update(const byte *input, size_t length)
-{
- m_mac1.Update(input, length);
- m_counter = (unsigned int)((m_counter + length) % T::BLOCKSIZE);
-}
-
-template <class T>
-void DMAC_Base<T>::TruncatedFinal(byte *mac, size_t size)
-{
- ThrowIfInvalidTruncatedSize(size);
-
- byte pad[T::BLOCKSIZE];
- byte padByte = byte(T::BLOCKSIZE-m_counter);
- memset(pad, padByte, padByte);
- m_mac1.Update(pad, padByte);
- m_mac1.TruncatedFinal(mac, size);
- m_f2.ProcessBlock(mac);
-
- m_counter = 0; // reset for next message
-}
-
-template <class T>
-byte *DMAC_Base<T>::GenerateSubKeys(const byte *key, size_t keylength)
-{
- typename T::Encryption cipher(key, keylength);
- memset(m_subkeys, 0, m_subkeys.size());
- cipher.ProcessBlock(m_subkeys);
- m_subkeys[m_subkeys.size()/2 + T::BLOCKSIZE - 1] = 1;
- cipher.ProcessBlock(m_subkeys+m_subkeys.size()/2);
- return m_subkeys;
-}
-
-NAMESPACE_END
-
-#endif