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tu.crossing.JavaCryptographicArchitecture.3.1.2.source-code.KeyPairGenerator.crysl Maven / Gradle / Ivy

SPEC java.security.KeyPairGenerator

OBJECTS
	java.lang.String algorithm;
	java.security.KeyPair keyPair;
	java.security.spec.AlgorithmParameterSpec params;
	int keysize;

EVENTS
	g1: getInstance(algorithm);
	g2: getInstance(algorithm, _);
	Get := g1 | g2;

	i1: initialize(keysize);
	i2: initialize(keysize, _);
	i3: initialize(params);
	i4: initialize(params, _);
	Init := i1 | i2 | i3 | i4;

	k1: keyPair = generateKeyPair();
	k2: keyPair = genKeyPair();
	Gen := k1 | k2;

ORDER
	Get, Init, Gen

CONSTRAINTS
	algorithm in {"RSA", "EC", "DSA", "DiffieHellman", "DH"}; //BSI TR-02102-1 Recommends atleast 3000bits for keys
	algorithm in {"RSA"} => keysize in {4096, 3072};
	algorithm in {"DSA"} => keysize in {3072};
	algorithm in {"DiffieHellman", "DH"} => keysize in {3072};
	algorithm in {"EC"} => keysize in {256};

REQUIRES
	algorithm in {"RSA"} => preparedRSA[params];
	algorithm in {"DSA"} => preparedDSA[params];
	algorithm in {"DiffieHellman", "DH"} => preparedDH[params];
	algorithm in {"EC"} => preparedEC[params];

ENSURES
	generatedKeypair[keyPair, algorithm];