Node.js

RSA Signature using Private Key from .snk File

See more RSA Examples

A .snk file (Strong Name Key file) is a file format used in the .NET ecosystem to store an RSA public/private key pair. This key pair is typically used for strong-naming assemblies, which is a process of signing .NET assemblies to ensure their integrity and to uniquely identify them.

This example loads a private key from a .snk file and creates an RSA signature.

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    var rsa = new chilkat.Rsa();

    //  Load the .snk and return the private key as XML.
    var xmlStr = rsa.SnkToXml("./test.snk");
    if (rsa.LastMethodSuccess == false) {
        console.log(rsa.LastErrorText);
        return;
    }

    var privKey = new chilkat.PrivateKey();
    success = privKey.LoadXml(xmlStr);
    if (success == false) {
        console.log(privKey.LastErrorText);
        return;
    }

    success = rsa.UsePrivateKey(privKey);
    if (success == false) {
        console.log(rsa.LastErrorText);
        return;
    }

    //  Sign the SHA-256 hash of the utf-8 byte representation of the contents of sb
    //  Return the signature in base64 format.
    rsa.EncodingMode = "base64";
    rsa.Charset = "utf-8";
    var sigBase64 = rsa.SignStringENC("This is the text to be hashed and signed.","sha256");
    if (rsa.LastMethodSuccess == false) {
        console.log(rsa.LastErrorText);
        return;
    }

    console.log("RSA signature as base64: " + sigBase64);

}

chilkatExample();