private static void test(PrivateKey privateKey, PublicKey publicKey) throws Exception {
testSignature("MD2withRSA", privateKey, publicKey);
testSignature("MD5withRSA", privateKey, publicKey);
testSignature("SHA1withRSA", privateKey, publicKey);
testSignature("SHA224withRSA", privateKey, publicKey);
testSignature("SHA256withRSA", privateKey, publicKey);
RSAPublicKey rsaKey = (RSAPublicKey) publicKey;
if (rsaKey.getModulus().bitLength() > 512) {
// for SHA384 and SHA512 the data is too long for 512 bit keys
testSignature("SHA384withRSA", privateKey, publicKey);
testSignature("SHA512withRSA", privateKey, publicKey);
}
}
static byte[] buildRSA(RSAPublicKey key) {
DataByteOutputStream out = new DataByteOutputStream();
BigInteger exponent = key.getPublicExponent();
BigInteger modulus = key.getModulus();
int exponentLength = BigIntegerLength(exponent);
if (exponentLength < 256) out.writeByte(exponentLength);
else {
out.writeByte(0);
out.writeShort(exponentLength);
}
out.writeBigInteger(exponent);
out.writeBigInteger(modulus);
return out.toByteArray();
}