/usr/include/botan-2/botan/fpe_fe1.h is in libbotan-2-dev 2.4.0-5ubuntu1.
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 | /*
* Format Preserving Encryption (FE1 scheme)
* (C) 2009 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_FPE_FE1_H_
#define BOTAN_FPE_FE1_H_
#include <botan/bigint.h>
#include <botan/symkey.h>
namespace Botan {
namespace FPE {
/**
* Format Preserving Encryption using the scheme FE1 from the paper
* "Format-Preserving Encryption" by Bellare, Rogaway, et al
* (https://eprint.iacr.org/2009/251)
*
* Encrypt X from and onto the group Z_n using key and tweak
* @param n the modulus
* @param X the plaintext as a BigInt
* @param key a random key
* @param tweak will modify the ciphertext (think of as an IV)
*/
BigInt BOTAN_PUBLIC_API(2,0) fe1_encrypt(const BigInt& n, const BigInt& X,
const SymmetricKey& key,
const std::vector<uint8_t>& tweak);
/**
* Decrypt X from and onto the group Z_n using key and tweak
* @param n the modulus
* @param X the ciphertext as a BigInt
* @param key is the key used for encryption
* @param tweak the same tweak used for encryption
*/
BigInt BOTAN_PUBLIC_API(2,0) fe1_decrypt(const BigInt& n, const BigInt& X,
const SymmetricKey& key,
const std::vector<uint8_t>& tweak);
}
}
#endif
|