diff options
author | lloyd <[email protected]> | 2009-04-16 22:48:52 +0000 |
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committer | lloyd <[email protected]> | 2009-04-16 22:48:52 +0000 |
commit | 967bf93208e061eb794ec0e368dec3c33a80615c (patch) | |
tree | 760919fe7f84c5f048d1de580b5228f35800918e /src/modes/xts/xts.h | |
parent | 07ffeeee0e4fd3cd2ccf4b3267fabef20eee2964 (diff) |
Add XTS mode, from IEEE P1619
Diffstat (limited to 'src/modes/xts/xts.h')
-rw-r--r-- | src/modes/xts/xts.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/src/modes/xts/xts.h b/src/modes/xts/xts.h new file mode 100644 index 000000000..01558175b --- /dev/null +++ b/src/modes/xts/xts.h @@ -0,0 +1,76 @@ +/* +* XTS mode, from IEEE P1619 +* (C) 2009 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ + +#ifndef BOTAN_XTS_H__ +#define BOTAN_XTS_H__ + +#include <botan/basefilt.h> +#include <botan/block_cipher.h> + +namespace Botan { + +/* +* XTS Encryption +*/ +class BOTAN_DLL XTS_Encryption : public Keyed_Filter + { + public: + void set_key(const SymmetricKey& key); + void set_iv(const InitializationVector& iv); + + std::string name() const; + + XTS_Encryption(BlockCipher* ciph); + + XTS_Encryption(BlockCipher* ciph, + const SymmetricKey& key, + const InitializationVector& iv); + + ~XTS_Encryption() { delete cipher; delete cipher2; } + private: + void write(const byte[], u32bit); + void end_msg(); + void encrypt(const byte block[]); + + BlockCipher* cipher; + BlockCipher* cipher2; + SecureVector<byte> tweak; + SecureVector<byte> buffer; + u32bit position; + }; + +/* +* XTS Decryption +*/ +class BOTAN_DLL XTS_Decryption : public Keyed_Filter + { + public: + void set_key(const SymmetricKey& key); + void set_iv(const InitializationVector& iv); + + std::string name() const; + + XTS_Decryption(BlockCipher* ciph); + + XTS_Decryption(BlockCipher* ciph, + const SymmetricKey& key, + const InitializationVector& iv); + private: + void write(const byte[], u32bit); + void end_msg(); + void decrypt(const byte[]); + + BlockCipher* cipher; + BlockCipher* cipher2; + SecureVector<byte> tweak; + SecureVector<byte> buffer; + u32bit position; + }; + +} + +#endif |