getRSAPrivateKey

getRSAPrivateKey.groovy

def getRSAPrivateKey(privateKey) {
    try {
        String privateKeyPEM = readFile privateKey
        privateKeyPEM = privateKeyPEM.replace("-----BEGIN CERTIFICATE-----\n", "");
        privateKeyPEM = privateKeyPEM.replace("-----END CERTIFICATE-----", "");

        byte[] encoded = Base64.decodeBase64(privateKeyPEM);
        KeyFactory kf = KeyFactory.getInstance("RSA");
        PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(encoded);
        RSAPrivateKey privKey = (RSAPrivateKey) kf.generatePrivate(keySpec);
        return privKey
    } catch(Exception e){
        echo "Exception: ${e}"
        error "Failed to create a RSAPrivateKey"
    }
}