diff options
| author | Vadim Dashevskiy <watcherhd@gmail.com> | 2012-05-15 10:38:20 +0000 |
|---|---|---|
| committer | Vadim Dashevskiy <watcherhd@gmail.com> | 2012-05-15 10:38:20 +0000 |
| commit | 48540940b6c28bb4378abfeb500ec45a625b37b6 (patch) | |
| tree | 2ef294c0763e802f91d868bdef4229b6868527de /plugins/CryptoPP/crypto/mdc.h | |
| parent | 5c350913f011e119127baeb32a6aedeb4f0d33bc (diff) | |
initial commit
git-svn-id: http://svn.miranda-ng.org/main/trunk@2 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
Diffstat (limited to 'plugins/CryptoPP/crypto/mdc.h')
| -rw-r--r-- | plugins/CryptoPP/crypto/mdc.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/plugins/CryptoPP/crypto/mdc.h b/plugins/CryptoPP/crypto/mdc.h new file mode 100644 index 0000000000..50c368be74 --- /dev/null +++ b/plugins/CryptoPP/crypto/mdc.h @@ -0,0 +1,72 @@ + // mdc.h - written and placed in the public domain by Wei Dai
+
+#ifndef CRYPTOPP_MDC_H
+#define CRYPTOPP_MDC_H
+
+/** \file
+*/
+
+#include "seckey.h"
+#include "misc.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+//! _
+template <class T>
+struct MDC_Info : public FixedBlockSize<T::DIGESTSIZE>, public FixedKeyLength<T::BLOCKSIZE>
+{
+ static std::string StaticAlgorithmName() {return std::string("MDC/")+T::StaticAlgorithmName();}
+};
+
+//! <a href="http://www.weidai.com/scan-mirror/cs.html#MDC">MDC</a>
+/*! a construction by Peter Gutmann to turn an iterated hash function into a PRF */
+template <class T>
+class MDC : public MDC_Info<T>
+{
+ class CRYPTOPP_NO_VTABLE Enc : public BlockCipherImpl<MDC_Info<T> >
+ {
+ typedef typename T::HashWordType HashWordType;
+
+ public:
+ void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs ¶ms)
+ {
+ this->AssertValidKeyLength(length);
+ memcpy_s(m_key, m_key.size(), userKey, this->KEYLENGTH);
+ T::CorrectEndianess(Key(), Key(), this->KEYLENGTH);
+ }
+
+ void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
+ {
+ T::CorrectEndianess(Buffer(), (HashWordType *)inBlock, this->BLOCKSIZE);
+ T::Transform(Buffer(), Key());
+ if (xorBlock)
+ {
+ T::CorrectEndianess(Buffer(), Buffer(), this->BLOCKSIZE);
+ xorbuf(outBlock, xorBlock, m_buffer, this->BLOCKSIZE);
+ }
+ else
+ T::CorrectEndianess((HashWordType *)outBlock, Buffer(), this->BLOCKSIZE);
+ }
+
+ bool IsPermutation() const {return false;}
+
+ unsigned int GetAlignment() const {return sizeof(HashWordType);}
+
+ private:
+ HashWordType *Key() {return (HashWordType *)m_key.data();}
+ const HashWordType *Key() const {return (const HashWordType *)m_key.data();}
+ HashWordType *Buffer() const {return (HashWordType *)m_buffer.data();}
+
+ // VC60 workaround: bug triggered if using FixedSizeAllocatorWithCleanup
+ FixedSizeSecBlock<byte, MDC_Info<T>::KEYLENGTH, AllocatorWithCleanup<byte> > m_key;
+ mutable FixedSizeSecBlock<byte, MDC_Info<T>::BLOCKSIZE, AllocatorWithCleanup<byte> > m_buffer;
+ };
+
+public:
+ //! use BlockCipher interface
+ typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
+};
+
+NAMESPACE_END
+
+#endif
|