mirror of https://github.com/PurpleI2P/i2pd.git
I2P: End-to-End encrypted and anonymous Internet
https://i2pd.website/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
45 lines
864 B
45 lines
864 B
/* |
|
* 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
|
|
|