/usr/include/botan/xts.h is in libbotan1.8-dev 1.8.13-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 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
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