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author | Tycho <work.tycho+git@gmail.com> | 2014-01-26 15:28:51 +0100 |
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committer | Tycho <work.tycho+git@gmail.com> | 2014-01-26 15:28:51 +0100 |
commit | bed2ee22e8283a2e8bd0790a89124839319c2fc3 (patch) | |
tree | ee9e66a7b7c63995797a502f209079c1422ce9c9 /lib/cryptopp/dmac.h | |
parent | Refactored cBlockHandler::OnUse and dependents (diff) | |
parent | Merge pull request #589 from mc-server/minecartimprovements (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | lib/cryptopp/dmac.h | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/lib/cryptopp/dmac.h b/lib/cryptopp/dmac.h deleted file mode 100644 index 80b54ac2f..000000000 --- a/lib/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 ¶ms); - 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 ¶ms) -{ - 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 |