mirror of
https://github.com/PurpleI2P/i2pd
synced 2024-11-10 08:00:38 +03:00
40 lines
660 B
C++
40 lines
660 B
C++
#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) 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
|
|
|
|
|