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| author | weidai <weidai11@users.noreply.github.com> | 2009-03-12 11:24:12 +0000 |
|---|---|---|
| committer | weidai <weidai11@users.noreply.github.com> | 2009-03-12 11:24:12 +0000 |
| commit | 2779fc60506e2042ab1569ffad4061f1187d186c (patch) | |
| tree | 68edc0bccf003f5615716b3ae2d6b97067af39c4 /eax.h | |
| parent | 64af4560dc8ba66ef0e2ac3b05dec6f445ec96fe (diff) | |
| download | cryptopp-git-2779fc60506e2042ab1569ffad4061f1187d186c.tar.gz | |
- add EAX mode, XSalsa20
- speed up GCM key setup
- wipe stack in AES assembly code
- speed up CFB mode
Diffstat (limited to 'eax.h')
| -rw-r--r-- | eax.h | 87 |
1 files changed, 87 insertions, 0 deletions
@@ -0,0 +1,87 @@ +#ifndef CRYPTOPP_EAX_H
+#define CRYPTOPP_EAX_H
+
+#include "authenc.h"
+#include "modes.h"
+#include "cmac.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+//! .
+class CRYPTOPP_NO_VTABLE EAX_Base : public AuthenticatedSymmetricCipherBase
+{
+public:
+ // AuthenticatedSymmetricCipher
+ std::string AlgorithmName() const
+ {return GetMAC().GetCipher().AlgorithmName() + std::string("/EAX");}
+ size_t MinKeyLength() const
+ {return GetMAC().MinKeyLength();}
+ size_t MaxKeyLength() const
+ {return GetMAC().MaxKeyLength();}
+ size_t DefaultKeyLength() const
+ {return GetMAC().DefaultKeyLength();}
+ size_t GetValidKeyLength(size_t n) const
+ {return GetMAC().GetValidKeyLength(n);}
+ bool IsValidKeyLength(size_t n) const
+ {return GetMAC().IsValidKeyLength(n);}
+ unsigned int OptimalDataAlignment() const
+ {return GetMAC().OptimalDataAlignment();}
+ IV_Requirement IVRequirement() const
+ {return UNIQUE_IV;}
+ unsigned int IVSize() const
+ {return GetMAC().TagSize();}
+ unsigned int MinIVLength() const
+ {return 0;}
+ unsigned int MaxIVLength() const
+ {return UINT_MAX;}
+ unsigned int DigestSize() const
+ {return GetMAC().TagSize();}
+ lword MaxHeaderLength() const
+ {return LWORD_MAX;}
+ lword MaxMessageLength() const
+ {return LWORD_MAX;}
+
+protected:
+ // AuthenticatedSymmetricCipherBase
+ bool AuthenticationIsOnPlaintext() const
+ {return false;}
+ unsigned int AuthenticationBlockSize() const
+ {return 1;}
+ void SetKeyWithoutResync(const byte *userKey, size_t keylength, const NameValuePairs ¶ms);
+ void Resync(const byte *iv, size_t len);
+ size_t AuthenticateBlocks(const byte *data, size_t len);
+ void AuthenticateLastHeaderBlock();
+ void AuthenticateLastFooterBlock(byte *mac, size_t macSize);
+ SymmetricCipher & AccessSymmetricCipher() {return m_ctr;}
+ const CMAC_Base & GetMAC() const {return const_cast<EAX_Base *>(this)->AccessMAC();}
+ virtual CMAC_Base & AccessMAC() =0;
+
+ CTR_Mode_ExternalCipher::Encryption m_ctr;
+};
+
+//! .
+template <class T_BlockCipher, bool T_IsEncryption>
+class EAX_Final : public EAX_Base
+{
+public:
+ static std::string StaticAlgorithmName()
+ {return T_BlockCipher::StaticAlgorithmName() + std::string("/EAX");}
+ bool IsForwardTransformation() const
+ {return T_IsEncryption;}
+
+private:
+ CMAC_Base & AccessMAC() {return m_cmac;}
+ CMAC<T_BlockCipher> m_cmac;
+};
+
+/// <a href="http://www.cryptolounge.org/wiki/EAX">EAX</a>
+template <class T_BlockCipher>
+struct EAX : public AuthenticatedSymmetricCipherDocumentation
+{
+ typedef EAX_Final<T_BlockCipher, true> Encryption;
+ typedef EAX_Final<T_BlockCipher, false> Decryption;
+};
+
+NAMESPACE_END
+
+#endif
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