Add SecretToPublicKey function for ed25519

Also remove IsClamped. Clamping occurs with ed25519, but it happens inside the Donna code. It is not needed elsewhere for ed25519.

1 files changed, 4 insertions, 11 deletions

diff --git a/xed25519.h b/xed25519.h
index bb6ff228..bf466f85 100644
--- a/xed25519.h
+++ b/xed25519.h
@@ -452,17 +452,6 @@ struct ed25519PrivateKey : public PKCS8PrivateKey
     void SetPrivateExponent(const Integer &x);

     const Integer& GetPrivateExponent() const;

 

-    /// \brief Clamp a private key

-    /// \param y public key

-    /// \param x private key

-    /// \details ClampKeys() clamps a private key and then regenerates the

-    ///   public key from the private key.

-    void ClampKeys(byte y[PUBLIC_KEYLENGTH], byte x[SECRET_KEYLENGTH]) const;

-

-    /// \brief Determine if private key is clamped

-    /// \param x private key

-    bool IsClamped(const byte x[SECRET_KEYLENGTH]) const;

-

     /// \brief Test if a key has small order

     /// \param y public key

     bool IsSmallOrder(const byte y[PUBLIC_KEYLENGTH]) const;

@@ -482,6 +471,10 @@ struct ed25519PrivateKey : public PKCS8PrivateKey
     }

 

 protected:

+    // Create a public key from a private key

+    void SecretToPublicKey(byte y[PUBLIC_KEYLENGTH], const byte x[SECRET_KEYLENGTH]) const;

+

+protected:

     FixedSizeSecBlock<byte, SECRET_KEYLENGTH> m_sk;

     FixedSizeSecBlock<byte, PUBLIC_KEYLENGTH> m_pk;

     OID m_oid;  // preferred OID