Examples of java.security.Signature.verify()

java.security.Signature.verify()
Verifies the passed-in signature.
A call to this method resets this signature object to the state it was in when previously initialized for verification via a call to initVerify(PublicKey). That is, the object is reset and available to verify another signature from the identity whose public key was specified in the call to initVerify. @param signature the signature bytes to be verified. @return true if the signature was verified, false if not. @exception SignatureException if this signature object is not initialized properly, the passed-in signature is improperly encoded or of the wrong type, if this signature algorithm is unable to process the input data provided, etc.


        sig.initVerify(verifyKey);


        sig.update(data);


        if (!sig.verify(sigBytes))
        {
            fail("SHA512 verification failed");
        }


        //

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        sig.initVerify(verifyKey);


        sig.update(data);


        if (!sig.verify(sigBytes))
        {
            fail("MD5/ISO verification failed");
        }


        sig = Signature.getInstance("SHA1WithRSA/ISO9796-2", "BC");

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        sig.initVerify(verifyKey);


        sig.update(data);


        if (!sig.verify(sigBytes))
        {
            fail("SHA1/ISO verification failed");
        }


        sig = Signature.getInstance("RIPEMD160WithRSA/ISO9796-2", "BC");

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        sig.initVerify(verifyKey);


        sig.update(data);


        if (!sig.verify(sigBytes))
        {
            fail("RIPEMD160/ISO verification failed");
        }


        //

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        sig.initVerify(pubKey);


        sig.update(data);


        if (!sig.verify(sigBytes))
        {
            fail("RIPEMD160/ISO verification failed");
        }
    }

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            s = Signature.getInstance("SHA1withRSAandMGF1", "BC");
            
            s.initVerify(pubKey);
            s.update(msg1a);
            if (!s.verify(sig1a))
            {
                return new SimpleTestResult(false, "SHA1 signature verification failed");
            }


            s = Signature.getInstance("SHA1withRSAandMGF1", "BC");

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            s.setParameter(PSSParameterSpec.DEFAULT);
            
            s.initVerify(pubKey);
            s.update(msg1a);
            if (!s.verify(sig1a))
            {
                return new SimpleTestResult(false, "SHA1 signature verification with default parameters failed");
            }
            
            AlgorithmParameters pss = s.getParameters();

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            s.setParameter(pss.getParameterSpec(PSSParameterSpec.class));
            
            s.initVerify(pubKey);
            s.update(msg1a);
            if (!s.verify(sig1b))
            {
                return new SimpleTestResult(false, "SHA256 signature verification failed");
            }


            //

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            s.setParameter(pss.getParameterSpec(PSSParameterSpec.class));
            
            s.initVerify(pubKey);
            s.update(msg1a);
            if (!s.verify(sig1c))
            {
                return new SimpleTestResult(false, "SHA512 signature verification failed");
            }
            
            return new SimpleTestResult(true, getName() + ": Okay");

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        sgr.initVerify(vKey);


        sgr.update(message);


        if (!sgr.verify(sigBytes))
        {
            fail("ECGOST3410 verification failed");
        }


        BigInteger[]  sig = decode(sigBytes);

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