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uni.BouncyCastle-JCA.3.0.1.source-code.Mac.crysl Maven / Gradle / Ivy

SPEC javax.crypto.Mac

OBJECTS
	javax.crypto.Mac mac;
	java.security.Key key;
	byte inputByte;
	byte[] preInput;
	byte[] input;
	byte[] output1;
	byte[] output2;
	java.nio.ByteBuffer preInputByteBuffer;
	java.lang.String algorithm;
	java.security.spec.AlgorithmParameterSpec params;
	int offset;
	int outOffset;
	int len;

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

	i1: init(key);
	i2: init(key, params);
	Init := i1 | i2;

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

	f1: output1 = doFinal();
	f2: output2 = doFinal(input);
	f3: doFinal(output1, outOffset);
	FinalWU := f2;
	FinalWOU := f1 | f3;
	Final := FinalWU | FinalWOU;

ORDER
	Get, Init, (FinalWU | (Update+, Final))+

CONSTRAINTS
	algorithm in {"AESCMAC", "AESCCMMAC", "HmacSHA256", "HmacSHA384", "HmacSHA512",
			 "HMACSHA3-256", "HMACSHA3-384", "HMACSHA3-512",
			 "PBEWithHmacSHA256", "PBEWithHmacSHA384", "PBEWithHmacSHA512", "Poly1305", "Shacal-2CMAC"};
	length[output1] > outOffset;
	length[preInput] >= offset + len;
	offset >= 0;
	len > 0;
    
REQUIRES
	!encrypted[output1, _];
	!encrypted[output2,_];
	preparedHMAC[params];
	generatedKey[key,_];

ENSURES
	macced[output1, inputByte];
	macced[output1, preInput];
	macced[output2, input];