Java Requires Chilkat v11.0.0+

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.

Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.PrivateKey;
import com.chilkatsoft.chilkat2.Rsa;

public class ChilkatExample {

    public static void main(String[] args) {
        Rsa rsa = new Rsa();

        // Load the .snk and return the private key as XML.
        String xmlStr;
        try {
            xmlStr = rsa.snkToXml("./test.snk");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        PrivateKey privKey = new PrivateKey();
        String sigBase64;
        try {
            privKey.loadXml(xmlStr);

            rsa.usePrivateKey(privKey);

            // Sign the SHA-256 hash of the utf-8 byte representation of the contents of sb
            // Return the signature in base64 format.
            rsa.setEncodingMode("base64");
            rsa.setCharset("utf-8");
            sigBase64 = rsa.signStringENC("This is the text to be hashed and signed.", "sha256");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("RSA signature as base64: " + sigBase64);
    }
}