Creating RSA keys from known parameters in Java

Question

I\'m working on implementing Bing Cashback. In order to verify an incoming request from Bing as valid they provide a signature. The signature is a 160-bit SHA-1 hash of the

Answer 1

RSAPublicKeySpec spec = new RSAPublicKeySpec(modulus, exponent);
KeyFactory factory = KeyFactory.getInstance("RSA");
PublicKey pub = factory.generatePublic(spec);
Signature verifier = Signature.getInstance("SHA1withRSA");
verifier.initVerify(pub);
verifier.update(url.getBytes("UTF-8")); // Or whatever interface specifies.
boolean okay = verifier.verify(signature);