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(.NET Core C#) Get an EC Key in Raw Hex FormatDemonstrates how to get the private and public key parts of an EC (ECDSA) key in lowercase hex formmat. Note: This example requires Chilkat v9.5.0.83 or greater.
// This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // Load an EC key from some format.. Chilkat.PrivateKey privKey = new Chilkat.PrivateKey(); // This loads an ECDSA key from an unencrypted PEM file (no password required). bool success = privKey.LoadAnyFormatFile("qa_data/ecc/openssl_ecc_privKey.pem",""); if (success == false) { Debug.WriteLine(privKey.LastErrorText); return; } // The key type should be "ecc" to indicate an EC key. Debug.WriteLine("key type = " + privKey.KeyType); // What is the size of the private key in bits? Debug.WriteLine("size in bits = " + Convert.ToString(privKey.BitLength)); // Get the private and public EC key parts in raw hex format: Chilkat.StringBuilder sbPubKeyHex = new Chilkat.StringBuilder(); string privKeyHex = privKey.GetRawHex(sbPubKeyHex); // If the private key size in bits is 256, then we should have a 32-byte key (a 64 character hex string). Debug.WriteLine("private key = " + privKeyHex); // The public key is composed of the "x" and "y" parts, and is composed like this: 04||HEX(x)||HEX(y) Debug.WriteLine("public key = " + sbPubKeyHex.GetAsString()); // Sample output: // key type = ecc // size in bits = 256 // private key = ced36f2ba3332be439f79143d69937fc52494cd38e45243c3ea05db183919f1b // public key = 045b4edcd501831740895f5907feabb71587076a6314d9d5141f9f8c33a478b8ce08b8dfd2a091eb6355803d7e729876c790bc0b176f2015f3bb103813753f676a |
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