Conversion of AzurePublicKey to PublicKey

gistfile1.txt

private PublicKey convertKey(AzurePublicKey azKey) {
		PublicKey publicKey = null;
		
		BigInteger modulus = new BigInteger(1, Base64.getUrlDecoder().decode(azKey.getN()));
		BigInteger exponent = new BigInteger(1, Base64.getUrlDecoder().decode(azKey.getE()));
		
		try {
			publicKey = KeyFactory.getInstance("RSA").generatePublic(new RSAPublicKeySpec(modulus, exponent));
			
			// load cert
			CertificateFactory factory;
			X509Certificate cert = null; 
			try {
				factory = CertificateFactory.getInstance("X.509");
				cert = (X509Certificate) factory.generateCertificate(new ByteArrayInputStream(DatatypeConverter.parseBase64Binary(azKey.getX5c().iterator().next())));
			} catch (CertificateException e) {
				e.printStackTrace();
			}

			// grab public key
			publicKey = (RSAPublicKey)cert.getPublicKey();
			
		} catch (InvalidKeySpecException | NoSuchAlgorithmException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		return publicKey;
	}