mirror of
https://github.com/PurpleI2P/i2pd.git
synced 2025-04-30 20:52:30 +02:00
45 lines
952 B
C++
45 lines
952 B
C++
/*
|
|
* Copyright (c) 2013-2020, The PurpleI2P Project
|
|
*
|
|
* This file is part of Purple i2pd project and licensed under BSD3
|
|
*
|
|
* See full license text in LICENSE file at top of project tree
|
|
*/
|
|
|
|
#ifndef ELLIGATOR_H__
|
|
#define ELLIGATOR_H__
|
|
|
|
#include <inttypes.h>
|
|
#include <memory>
|
|
#include <openssl/bn.h>
|
|
|
|
namespace i2p {
|
|
namespace crypto {
|
|
|
|
class Elligator2 {
|
|
public:
|
|
|
|
Elligator2();
|
|
|
|
~Elligator2();
|
|
|
|
bool Encode(const uint8_t *key, uint8_t *encoded, bool highY = false, bool random = true) const;
|
|
|
|
bool Decode(const uint8_t *encoded, uint8_t *key) const;
|
|
|
|
private:
|
|
|
|
void SquareRoot(const BIGNUM *x, BIGNUM *r, BN_CTX *ctx) const;
|
|
|
|
int Legendre(const BIGNUM *a, BN_CTX *ctx) const; // a/p
|
|
|
|
private:
|
|
|
|
BIGNUM *p, *p38, *p12, *p14, *sqrtn1, *A, *nA, *u, *iu;
|
|
};
|
|
|
|
std::unique_ptr <Elligator2> &GetElligator();
|
|
}
|
|
}
|
|
|
|
#endif
|