(C# UWP/WinRT) Get an Ed25519 Key in Raw Hex Format

Demonstrates how to get the private and public key parts of an Ed25519 key in lowercase hex formmat.

Note: This example requires Chilkat v9.5.0.83 or greater.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// Load an Ed25519 key from some format..
Chilkat.PrivateKey privKey = new Chilkat.PrivateKey();

// This loads an Ed25519 key from an unencrypted PEM file (no password required).
bool success = privKey.LoadAnyFormatFile("qa_data/eddsa/ed25519.pem","");
if (success == false) {
    Debug.WriteLine(privKey.LastErrorText);
    return;
}

// The key type should be "ed25519" to indicate an Ed25519 key.
Debug.WriteLine("key type = " + privKey.KeyType);

// What is the size of the private key in bits?  (should always be 256 bits for Ed25519)
Debug.WriteLine("size in bits = " + Convert.ToString(privKey.BitLength));

// Get the private and public key parts in raw hex format:
Chilkat.StringBuilder sbPubKeyHex = new Chilkat.StringBuilder();
string privKeyHex = privKey.GetRawHex(sbPubKeyHex);

// We should have a 32-byte private key (a 64 character hex string).
Debug.WriteLine("private key = " + privKeyHex);

// We should have a 32-byte public key (a 64 character hex string).
Debug.WriteLine("public key = " + sbPubKeyHex.GetAsString());

// Sample output:
// key type = ed25519
// size in bits = 256
// private key = d4ee72dbf913584ad5b6d8f1f769f8ad3afe7c28cbf1d4fbe097a88f44755842
// public key = 19bf44096984cdfe8541bac167dc3b96c85086aa30b6b6cb0c5c38ad703166e1