diff options
Diffstat (limited to 'CryptoPP/gcm.h')
| -rw-r--r-- | CryptoPP/gcm.h | 212 |
1 files changed, 106 insertions, 106 deletions
diff --git a/CryptoPP/gcm.h b/CryptoPP/gcm.h index 0b32524f9..272a51c9c 100644 --- a/CryptoPP/gcm.h +++ b/CryptoPP/gcm.h @@ -1,106 +1,106 @@ -#ifndef CRYPTOPP_GCM_H
-#define CRYPTOPP_GCM_H
-
-#include "authenc.h"
-#include "modes.h"
-
-NAMESPACE_BEGIN(CryptoPP)
-
-//! .
-enum GCM_TablesOption {GCM_2K_Tables, GCM_64K_Tables};
-
-//! .
-class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE GCM_Base : public AuthenticatedSymmetricCipherBase
-{
-public:
- // AuthenticatedSymmetricCipher
- std::string AlgorithmName() const
- {return GetBlockCipher().AlgorithmName() + std::string("/GCM");}
- size_t MinKeyLength() const
- {return GetBlockCipher().MinKeyLength();}
- size_t MaxKeyLength() const
- {return GetBlockCipher().MaxKeyLength();}
- size_t DefaultKeyLength() const
- {return GetBlockCipher().DefaultKeyLength();}
- size_t GetValidKeyLength(size_t n) const
- {return GetBlockCipher().GetValidKeyLength(n);}
- bool IsValidKeyLength(size_t n) const
- {return GetBlockCipher().IsValidKeyLength(n);}
- unsigned int OptimalDataAlignment() const;
- IV_Requirement IVRequirement() const
- {return UNIQUE_IV;}
- unsigned int IVSize() const
- {return 12;}
- unsigned int MinIVLength() const
- {return 1;}
- unsigned int MaxIVLength() const
- {return UINT_MAX;} // (W64LIT(1)<<61)-1 in the standard
- unsigned int DigestSize() const
- {return 16;}
- lword MaxHeaderLength() const
- {return (W64LIT(1)<<61)-1;}
- lword MaxMessageLength() const
- {return ((W64LIT(1)<<39)-256)/8;}
-
-protected:
- // AuthenticatedSymmetricCipherBase
- bool AuthenticationIsOnPlaintext() const
- {return false;}
- unsigned int AuthenticationBlockSize() const
- {return HASH_BLOCKSIZE;}
- 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 AuthenticateLastConfidentialBlock();
- void AuthenticateLastFooterBlock(byte *mac, size_t macSize);
- SymmetricCipher & AccessSymmetricCipher() {return m_ctr;}
-
- virtual BlockCipher & AccessBlockCipher() =0;
- virtual GCM_TablesOption GetTablesOption() const =0;
-
- const BlockCipher & GetBlockCipher() const {return const_cast<GCM_Base *>(this)->AccessBlockCipher();};
- byte *HashBuffer() {return m_buffer+REQUIRED_BLOCKSIZE;}
- byte *HashKey() {return m_buffer+2*REQUIRED_BLOCKSIZE;}
- byte *MulTable() {return m_buffer+3*REQUIRED_BLOCKSIZE;}
- inline void ReverseHashBufferIfNeeded();
-
- class CRYPTOPP_DLL GCTR : public CTR_Mode_ExternalCipher::Encryption
- {
- protected:
- void IncrementCounterBy256();
- };
-
- GCTR m_ctr;
- static word16 s_reductionTable[256];
- static volatile bool s_reductionTableInitialized;
- enum {REQUIRED_BLOCKSIZE = 16, HASH_BLOCKSIZE = 16};
-};
-
-//! .
-template <class T_BlockCipher, GCM_TablesOption T_TablesOption, bool T_IsEncryption>
-class GCM_Final : public GCM_Base
-{
-public:
- static std::string StaticAlgorithmName()
- {return T_BlockCipher::StaticAlgorithmName() + std::string("/GCM");}
- bool IsForwardTransformation() const
- {return T_IsEncryption;}
-
-private:
- GCM_TablesOption GetTablesOption() const {return T_TablesOption;}
- BlockCipher & AccessBlockCipher() {return m_cipher;}
- typename T_BlockCipher::Encryption m_cipher;
-};
-
-//! <a href="http://www.cryptolounge.org/wiki/GCM">GCM</a>
-template <class T_BlockCipher, GCM_TablesOption T_TablesOption=GCM_2K_Tables>
-struct GCM : public AuthenticatedSymmetricCipherDocumentation
-{
- typedef GCM_Final<T_BlockCipher, T_TablesOption, true> Encryption;
- typedef GCM_Final<T_BlockCipher, T_TablesOption, false> Decryption;
-};
-
-NAMESPACE_END
-
-#endif
+#ifndef CRYPTOPP_GCM_H +#define CRYPTOPP_GCM_H + +#include "authenc.h" +#include "modes.h" + +NAMESPACE_BEGIN(CryptoPP) + +//! . +enum GCM_TablesOption {GCM_2K_Tables, GCM_64K_Tables}; + +//! . +class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE GCM_Base : public AuthenticatedSymmetricCipherBase +{ +public: + // AuthenticatedSymmetricCipher + std::string AlgorithmName() const + {return GetBlockCipher().AlgorithmName() + std::string("/GCM");} + size_t MinKeyLength() const + {return GetBlockCipher().MinKeyLength();} + size_t MaxKeyLength() const + {return GetBlockCipher().MaxKeyLength();} + size_t DefaultKeyLength() const + {return GetBlockCipher().DefaultKeyLength();} + size_t GetValidKeyLength(size_t n) const + {return GetBlockCipher().GetValidKeyLength(n);} + bool IsValidKeyLength(size_t n) const + {return GetBlockCipher().IsValidKeyLength(n);} + unsigned int OptimalDataAlignment() const; + IV_Requirement IVRequirement() const + {return UNIQUE_IV;} + unsigned int IVSize() const + {return 12;} + unsigned int MinIVLength() const + {return 1;} + unsigned int MaxIVLength() const + {return UINT_MAX;} // (W64LIT(1)<<61)-1 in the standard + unsigned int DigestSize() const + {return 16;} + lword MaxHeaderLength() const + {return (W64LIT(1)<<61)-1;} + lword MaxMessageLength() const + {return ((W64LIT(1)<<39)-256)/8;} + +protected: + // AuthenticatedSymmetricCipherBase + bool AuthenticationIsOnPlaintext() const + {return false;} + unsigned int AuthenticationBlockSize() const + {return HASH_BLOCKSIZE;} + 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 AuthenticateLastConfidentialBlock(); + void AuthenticateLastFooterBlock(byte *mac, size_t macSize); + SymmetricCipher & AccessSymmetricCipher() {return m_ctr;} + + virtual BlockCipher & AccessBlockCipher() =0; + virtual GCM_TablesOption GetTablesOption() const =0; + + const BlockCipher & GetBlockCipher() const {return const_cast<GCM_Base *>(this)->AccessBlockCipher();}; + byte *HashBuffer() {return m_buffer+REQUIRED_BLOCKSIZE;} + byte *HashKey() {return m_buffer+2*REQUIRED_BLOCKSIZE;} + byte *MulTable() {return m_buffer+3*REQUIRED_BLOCKSIZE;} + inline void ReverseHashBufferIfNeeded(); + + class CRYPTOPP_DLL GCTR : public CTR_Mode_ExternalCipher::Encryption + { + protected: + void IncrementCounterBy256(); + }; + + GCTR m_ctr; + static word16 s_reductionTable[256]; + static volatile bool s_reductionTableInitialized; + enum {REQUIRED_BLOCKSIZE = 16, HASH_BLOCKSIZE = 16}; +}; + +//! . +template <class T_BlockCipher, GCM_TablesOption T_TablesOption, bool T_IsEncryption> +class GCM_Final : public GCM_Base +{ +public: + static std::string StaticAlgorithmName() + {return T_BlockCipher::StaticAlgorithmName() + std::string("/GCM");} + bool IsForwardTransformation() const + {return T_IsEncryption;} + +private: + GCM_TablesOption GetTablesOption() const {return T_TablesOption;} + BlockCipher & AccessBlockCipher() {return m_cipher;} + typename T_BlockCipher::Encryption m_cipher; +}; + +//! <a href="http://www.cryptolounge.org/wiki/GCM">GCM</a> +template <class T_BlockCipher, GCM_TablesOption T_TablesOption=GCM_2K_Tables> +struct GCM : public AuthenticatedSymmetricCipherDocumentation +{ + typedef GCM_Final<T_BlockCipher, T_TablesOption, true> Encryption; + typedef GCM_Final<T_BlockCipher, T_TablesOption, false> Decryption; +}; + +NAMESPACE_END + +#endif |