React Native 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.

React Native

import { PrivateKey, Rsa } from '@chilkat/react-native'

function chilkatExample() {
  const rsa = new Rsa();

  // Load the .snk and return the private key as XML.
  let xmlStr: string;
  try {
    xmlStr = rsa.snkToXml('./test.snk');
  } catch {
    console.log(rsa.lastErrorText);
    return;
  }

  const privKey = new PrivateKey();
  try {
    privKey.loadXml(xmlStr);
  } catch {
    console.log(privKey.lastErrorText);
    return;
  }

  try {
    rsa.usePrivateKey(privKey);
  } catch {
    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';
  let sigBase64: string;
  try {
    sigBase64 = rsa.signStringENC('This is the text to be hashed and signed.', 'sha256');
  } catch {
    console.log(rsa.lastErrorText);
    return;
  }

  console.log(`RSA signature as base64: ${sigBase64}`);
}