React Native

AddDetachedSignaturePk

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Demonstrates how to add a detached signature using a certifcate and it's corresponding private key. The easiest way of doing it is when both the certificate and private key are contained together within a PFX (.pfx or .p12) file. This example demonstrates how to use the certificate and its corresponding private key when they are stored in separate files -- a .cer for the certificate, and a .pem for the private key. React Native

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

function chilkatExample() {
  // This example assumes the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  const mime = new Mime();

  // Load the certificate from a .cer file.
  const cert = new Cert();
  try {
    cert.loadFromFile('aaworkarea/myCert.cer');
  } catch {
    console.log(cert.lastErrorText);
    return;
  }

  // Load the private key from an encrypted PEM file.
  // (A private key can be loaded from other file formats also..)
  const privKey = new PrivateKey();
  try {
    privKey.loadEncryptedPemFile('aaworkarea/myPrivateKey.pem', 'myPassword');
  } catch {
    console.log(privKey.lastErrorText);
    return;
  }

  mime.setBodyFromPlainText('This is the plain-text MIME body.');

  // Sign the MIME (adds a PKCS7 detached signature)
  try {
    mime.addDetachedSignaturePk(cert, privKey);
  } catch {
    console.log(mime.lastErrorText);
    return;
  }

  // Save the S/MIME to a file.
  try {
    mime.saveMime('aaworkarea/signedMime.txt');
  } catch {
    console.log(mime.lastErrorText);
    return;
  }

  console.log('success!');
}