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(.NET Core C#) Generate ECDSA Key and Get Details as XMLDemonstrates how to generate an ECC key and gets the parts as XML.
// This requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. Chilkat.Ecc ecc = new Chilkat.Ecc(); // Generate a random ECC private key on the secp256k1 curve. // Chilkat also supports other curves, such as secp384r1, secp521r1, and secp256r1. // Create a Fortuna PRNG and seed it with system entropy. // This will be our source of random data for generating the ECC private key. Chilkat.Prng fortuna = new Chilkat.Prng(); string entropy = fortuna.GetEntropy(32,"base64"); bool success = fortuna.AddEntropy(entropy,"base64"); Chilkat.PrivateKey privKey = ecc.GenEccKey("secp256k1",fortuna); if (ecc.LastMethodSuccess != true) { Debug.WriteLine(ecc.LastErrorText); return; } // An EC private key has this ASN.1 // ECPrivateKey ::= SEQUENCE { // version INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1), // privateKey OCTET STRING, // parameters [0] ECParameters {{ NamedCurve }} OPTIONAL, // publicKey [1] BIT STRING OPTIONAL (This is the ANSI X9.63 public key format.) Chilkat.Asn asn = new Chilkat.Asn(); success = asn.LoadEncoded(privKey.GetPkcs1ENC("base64"),"base64"); if (success != true) { Debug.WriteLine(asn.LastErrorText); return; } Chilkat.Xml xml = new Chilkat.Xml(); xml.LoadXml(asn.AsnToXml()); Debug.WriteLine(xml.GetXml()); // The XML looks like this: // <?xml version="1.0" encoding="utf-8" ?> // <sequence> // <int>01</int> // <octets>JgJvBG+3wletkJab8iXAkpz0O8/AgWZSpkYVcB7SpnU=</octets> // <contextSpecific tag="0" constructed="1"> // <oid>1.3.132.0.10</oid> // </contextSpecific> // </sequence> // The 32-byte private key is in the octets.. // Get it as hex. Chilkat.Crypt2 crypt = new Chilkat.Crypt2(); string privKeyHex = crypt.ReEncode(xml.GetChildContent("octets"),"base64","hex"); Debug.WriteLine("EC private key as hex = " + privKeyHex); |
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