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(pubKey);


        sig.update(req.getCertificationRequestInfo().getEncoded());


        if (!sig.verify(req.getSignature().getBytes()))
        {
            fail("signature not mapped correctly.");
        }
    }

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        sig.initVerify(cert.getPublicKey());
        
        sig.update(tbs);
        
        assertFalse(sig.verify(cert.getSignature()));
    }


    private X509Certificate loadCert(
        String certName)
        throws Exception

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        }


        sig.initVerify(key);
        sig.update(this.getTBSCertList());


        if (!sig.verify(this.getSignature()))
        {
            throw new SignatureException("CRL does not verify with supplied public key.");
        }
    }

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        Signature sig = Signature.getInstance(sigAlg.getObjectId().getId(),
                "BC");
        sig.initVerify(pubkey);
        sig.update(content.getBytes());


        return sig.verify(sigBits);
    }


    public void sign(PrivateKey priv_key) throws NoSuchAlgorithmException,
            InvalidKeyException, SignatureException, NoSuchProviderException,
            InvalidKeySpecException

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        catch (IOException e)
        {
            throw new SignatureException("Exception encoding certificate info object");
        }


        if (!signature.verify(this.getSignature()))
        {
            throw new InvalidKeyException("Public key presented not for certificate signature");
        }
    }

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        sgr.initVerify(vKey);


        sgr.update(message);


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


        //

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        sgr.initVerify(vKey);


        sgr.update(message);


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


        //

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        sgr.initVerify(vKey);
        
        sgr.update(message);
        
        if (!sgr.verify(sigBytes))
        {
            fail("239 Bit EC verification failed");
        }
        
        BigInteger[]  sig = derDecode(sigBytes);

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        sgr.initVerify(vKey);


        sgr.update(message);


        if (!sgr.verify(sigBytes))
        {
            fail("239 Bit EC verification failed");
        }


        BigInteger[]  sig = derDecode(sigBytes);

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        sgr.initVerify(vKey);


        sgr.update(message);


        if (!sgr.verify(sigBytes))
        {
            fail("239 Bit EC RIPEMD160 verification failed");
        }
    }

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