added support for RSA signatures.

[khatribharat]

I've added support for RSA signatures.

Usage :

/* sign */ 
var signatory = new JSEncrypt();
var privateKey = "RSA_PRIVATE_KEY";
signatory.setPrivateKey(privateKey);
var message = "I'm a message, sign me !";
var rsa_sha256_signature = signatory.sign(message, CryptoJS.SHA256);

/* verify */
var verifier = new JSEncrypt();
var publicKey = "RSA_PUBLIC_KEY";
verifier.setPublicKey(publicKey);
if (verifier.verify(message, rsa_sha256_signature, CryptoJS.SHA256)) {
 console.log("valid signature !");
}

[travist]

Thank you for your contribution. I think I can accept this once myself and maybe some other people have time to test it and verify that it works as it should. There are a few things that need to be fixed with regard to coding standards, but I will put those in other comments.

[travist]

Why not just assign the function directly instead of having a separate function? Something like this?

RSAKey.prototype.verify = function(text, signature, digestMethod) {
  var c = parseBigInt(signature, 16);
  var m = c.modPowInt(this.e, this.n);
  if (m == null) return null;
  var digest = pkcs1unpad2(m, (this.n.bitLength()+7)>>3);
  console.log("RSAVerify: message digest :- " + digest);
  return digest == digestMethod(text);
};

Same goes for the other function you created.

[bramski]

+1 ?

[alecdotninja]

+1

[walmon]

You example is always returning false

[cmcg513]

+1

[briantbutton]

-er- any way I could help to get this updated and merged? Really need the signing feature.

[hazcod]

@khatribharat Any chance you could fix those conflicts?

[travist]

Please rebase against master using TypeScript.

[tianyingchun]

the digest method CryptoJS.SHA256 is npm module crypto-js? i see the test case it use customized digestmethod

const digest = (data: string): string => {
        return data;
      };

it works fine, if we use md5, 'sha256`, it always return false. it's a bug?