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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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5
libi2pd/NTCP2.cpp
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@ -67,7 +67,7 @@ namespace transport
// x25519 between rs and priv
uint8_t inputKeyMaterial[32];
BN_CTX * ctx = BN_CTX_new ();
i2p::crypto::GetEd25519 ()->Mul (rs, m_ExpandedPrivateKey, inputKeyMaterial, ctx); // rs*priv
i2p::crypto::GetEd25519 ()->ScalarMul (rs, m_ExpandedPrivateKey, inputKeyMaterial, ctx); // rs*priv
BN_CTX_free (ctx);
// temp_key = HMAC-SHA256(ck, input_key_material)
uint8_t tempKey[32]; unsigned int len;
@ -87,8 +87,7 @@ namespace transport
RAND_bytes (key, 32);
i2p::crypto::Ed25519::ExpandPrivateKey (key, m_ExpandedPrivateKey);
BN_CTX * ctx = BN_CTX_new ();
auto publicKey = i2p::crypto::GetEd25519 ()->GeneratePublicKey (m_ExpandedPrivateKey, ctx);
i2p::crypto::GetEd25519 ()->EncodePublicKey (publicKey, pub, ctx);
i2p::crypto::GetEd25519 ()->ScalarMulB (m_ExpandedPrivateKey, pub, ctx);
BN_CTX_free (ctx);
}