Required parameter is not generated properly about cognicrypt_testgen

[rakshitkr]

Transformation string is generated incorrect because currently the test generator does not support two step generation for handling the below constraint type. Two step generation is needed because the class type of key is known only after the generation of init method.

instanceOf[key, java.security.PublicKey] || instanceOf[key, java.security.PrivateKey] || instanceOf[cert, java.security.cert.Certificate]|| encmode in {3, 4} => alg(transformation) in {"RSA"};

Cipher cipher0 = Cipher.getInstance("RSA"); // wrong transformation string is generated
cipher0.init(1, secretKey);
byte[] pre_ciphertext = cipher0.update(pre_plaintext);
Assertions.hasEnsuredPredicate(pre_ciphertext);
Assertions.mustNotBeInAcceptingState(cipher0);
pBEKeySpec0.clearPassword();
Assertions.mustBeInAcceptingState(pBEKeySpec0);

Following test cases have the above issue

• cipherInvalidTest23
• cipherInvalidTest24
• cipherInvalidTest25
• cipherInvalidTest26
• cipherInvalidTest27
• cipherInvalidTest28
• cipherValidTest13()
• cipherValidTest14()
• cipherValidTest15()
• cipherValidTest16()
• cipherValidTest17()
• cipherValidTest18()
• cipherValidTest26()
• cipherValidTest27()
• cipherValidTest28()
• cipherValidTest29()
• cipherValidTest30()
• cipherValidTest31()

[rakshitkr]

Test generator does not recognize negated predicates like below in the REQUIRES section. Thus it generates the code from the associated specification. (for the below case it is Cipher)

REQUIRES
    !encrypted[output1, _];

	@Test
	public void macInvalidTest9() throws IllegalStateException, BadPaddingException, NoSuchPaddingException,
			IllegalBlockSizeException, NoSuchAlgorithmException, InvalidKeyException, ShortBufferException {

		Certificate cert = null;
		byte[] plainText = null;
		byte[] pre_plaintext = null;

		Cipher cipher0 = Cipher.getInstance("RSA");
		cipher0.init(1, cert);
		byte[] pre_ciphertext = cipher0.update(pre_plaintext);
		byte[] cipherText = cipher0.doFinal(plainText);
		Assertions.hasEnsuredPredicate(cipherText);
		Assertions.mustBeInAcceptingState(cipher0);

		int outOffset = 0;

		Mac mac0 = Mac.getInstance("HmacMD5");
		mac0.doFinal(cipherText, outOffset);
		Assertions.notHasEnsuredPredicate(cipherText); // FAILS
		Assertions.mustNotBeInAcceptingState(mac0);

	}

	@Test
	public void macInvalidTest22() throws IllegalStateException, BadPaddingException, NoSuchPaddingException,
			IllegalBlockSizeException, NoSuchAlgorithmException, InvalidKeyException, ShortBufferException {

		Certificate cert = null;
		byte[] plainText = null;
		byte[] pre_plaintext = null;

		Cipher cipher0 = Cipher.getInstance("RSA");
		cipher0.init(1, cert);
		byte[] pre_ciphertext = cipher0.update(pre_plaintext);
		byte[] cipherText = cipher0.doFinal(plainText);
		Assertions.hasEnsuredPredicate(cipherText);
		Assertions.mustBeInAcceptingState(cipher0);

		int outOffset = 0;
		byte inp = 0;

		Mac mac0 = Mac.getInstance("HmacMD5");
		mac0.update(inp);
		mac0.doFinal(cipherText, outOffset);
		Assertions.notHasEnsuredPredicate(cipherText); // FAILS
		Assertions.mustNotBeInAcceptingState(mac0);

	}

[rakshitkr]

CONSTRAINTS
	offset < len;

@Test
	public void macValidTest10() throws IllegalStateException, NoSuchAlgorithmException, InvalidKeyException {

		int offset = 0;
		int len = 0; // initialised with incorrect value
		byte[] pre_input = null;
		Key key = null;

		Mac mac0 = Mac.getInstance("HmacMD5");
		mac0.init(key);
		mac0.update(pre_input, offset, len);
		byte[] output1 = mac0.doFinal();
		Assertions.hasEnsuredPredicate(output1); // FAILS
		Assertions.mustBeInAcceptingState(mac0);

	}