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authorlloyd <[email protected]>2009-04-16 22:48:52 +0000
committerlloyd <[email protected]>2009-04-16 22:48:52 +0000
commit967bf93208e061eb794ec0e368dec3c33a80615c (patch)
tree760919fe7f84c5f048d1de580b5228f35800918e /src/modes/xts/xts.h
parent07ffeeee0e4fd3cd2ccf4b3267fabef20eee2964 (diff)
Add XTS mode, from IEEE P1619
Diffstat (limited to 'src/modes/xts/xts.h')
-rw-r--r--src/modes/xts/xts.h76
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