/usr/include/botan-1.10/botan/ctr.h is in libbotan1.10-dev 1.10.12-1.
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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 | /*
* CTR-BE Mode
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_CTR_BE_H__
#define BOTAN_CTR_BE_H__
#include <botan/block_cipher.h>
#include <botan/stream_cipher.h>
namespace Botan {
/**
* CTR-BE (Counter mode, big-endian)
*/
class BOTAN_DLL CTR_BE : public StreamCipher
{
public:
void cipher(const byte in[], byte out[], size_t length);
void set_iv(const byte iv[], size_t iv_len);
bool valid_iv_length(size_t iv_len) const
{ return (iv_len <= permutation->block_size()); }
Key_Length_Specification key_spec() const
{
return permutation->key_spec();
}
std::string name() const;
CTR_BE* clone() const
{ return new CTR_BE(permutation->clone()); }
void clear();
/**
* @param cipher the underlying block cipher to use
*/
CTR_BE(BlockCipher* cipher);
~CTR_BE();
private:
void key_schedule(const byte key[], size_t key_len);
void increment_counter();
BlockCipher* permutation;
SecureVector<byte> counter, buffer;
size_t position;
};
}
#endif
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