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I2P: End-to-End encrypted and anonymous Internet
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39 lines
660 B
39 lines
660 B
#ifndef ELLIGATOR_H__ |
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#define ELLIGATOR_H__ |
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#include <inttypes.h> |
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#include <memory> |
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#include <openssl/bn.h> |
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namespace i2p |
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{ |
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namespace crypto |
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{ |
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class Elligator2 |
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{ |
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public: |
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Elligator2 (); |
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~Elligator2 (); |
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bool Encode (const uint8_t * key, uint8_t * encoded, bool highY = false) const; |
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bool Decode (const uint8_t * encoded, uint8_t * key) const; |
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private: |
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void SquareRoot (const BIGNUM * x, BIGNUM * r, BN_CTX * ctx) const; |
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int Legendre (const BIGNUM * a, BN_CTX * ctx) const; // a/p |
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private: |
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BIGNUM * p, * p38, * p12, * p14, * sqrtn1, * A, * nA, * u, * iu; |
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}; |
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std::unique_ptr<Elligator2>& GetElligator (); |
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} |
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} |
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#endif |
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