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scalar multiplication for x25519

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orignal 2018-06-12 12:42:20 -04:00
parent a8278fc78b
commit 046a80cfe4
3 changed files with 103 additions and 9 deletions
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6
libi2pd/Ed25519.h
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@ -75,7 +75,8 @@ namespace crypto
EDDSAPoint GeneratePublicKey (const uint8_t * expandedPrivateKey, BN_CTX * ctx) const;
EDDSAPoint DecodePublicKey (const uint8_t * buf, BN_CTX * ctx) const;
void EncodePublicKey (const EDDSAPoint& publicKey, uint8_t * buf, BN_CTX * ctx) const;
void Mul (const uint8_t * p, const uint8_t * e, uint8_t * buf, BN_CTX * ctx) const; // p is point, e is number
void ScalarMul (const uint8_t * p, const uint8_t * e, uint8_t * buf, BN_CTX * ctx) const; // p is point, e is number for x25519
void ScalarMulB (const uint8_t * e, uint8_t * buf, BN_CTX * ctx) const;
bool Verify (const EDDSAPoint& publicKey, const uint8_t * digest, const uint8_t * signature) const;
void Sign (const uint8_t * expandedPrivateKey, const uint8_t * publicKeyEncoded, const uint8_t * buf, size_t len, uint8_t * signature) const;
@ -99,6 +100,9 @@ namespace crypto
BIGNUM * DecodeBN (const uint8_t * buf) const;
void EncodeBN (const BIGNUM * bn, uint8_t * buf, size_t len) const;
// for x25519
BIGNUM * ScalarMul (const BIGNUM * p, const BIGNUM * e, BN_CTX * ctx) const;
private:
BIGNUM * q, * l, * d, * I;