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

SPEC java.security.Signature

OBJECTS
	byte[] sign;
	byte inputByte;
	byte[] input;
	byte[] output;
	java.nio.ByteBuffer inputByteBuffer;
	java.lang.String algorithm;
	java.security.PrivateKey privateKey;
	java.security.PublicKey publicKey;
	java.security.cert.Certificate cert;
	java.security.spec.AlgorithmParameterSpec params;
	boolean verified;
	int offset;
	int len;

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

	i1: initSign(privateKey);
	i2: initSign(privateKey, _);
	i3: initVerify(cert);
	i4: initVerify(publicKey);
	InitSign := i1 | i2;
	InitVerify := i3 | i4;

	u1: update(input);
	u2: update(inputByte);
	u3: update(input, offset, len);
	u4: update(inputByteBuffer);
	Update := u1 | u2 | u3 | u4;

	s1: output = sign();
	s2: sign(output, offset, len);
	Sign := s1 | s2;

	v1: verified = verify(sign);
	v2: verified = verify(sign, offset, len);
	Verify := v1 | v2;

ORDER
	Get, ((InitSign+, (Update+, Sign+)+ )+ | (InitVerify+, (Update*, Verify+)+ )+ )

CONSTRAINTS
	algorithm in {"SHA256withRSA", "SHA256withECDSA", "SHA256withDSA", "SHA384withRSA", "SHA512withRSA", "SHA384withECDSA", "SHA512withECDSA"};
    length[input] >= offset + len;
    offset >= 0;
    len > 0;
    
REQUIRES
	generatedPrivkey[privateKey];
	generatedPubkey[publicKey];

ENSURES
	signed[output, inputByte] after Sign;
	signed[output, input] after Sign;
	signed[output, inputByteBuffer] after Sign;
	verified[verified, sign] after Verify;