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.


        sgr.initVerify(pair.getPublic());


        sgr.update(message);


        if (!sgr.verify(sigBytes))
        {
            fail("DSTU4145 verification failed");
        }


        BigInteger[] sig = decode(sigBytes);

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        catch (Exception e)
        {
            throw new SignatureException("exception encoding TBS cert request - " + e);
        }


        return sig.verify(sigBits.getBytes());
    }


    /**
     * return a DER encoded byte array representing this object
     */

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            aOut.writeObject(req.getTbsRequest());


            signature.update(bOut.toByteArray());


            return signature.verify(this.getSignature());
        }
        catch (NoSuchProviderException e)
        {
            // TODO Why this special case?
            throw e;

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    try {
      Signature signature = Signature.getInstance("SHA256withECDSA");
      signature.initVerify(logInfo.getKey());
      signature.update(toVerify);
      return signature.verify(sct.getSignature().getSignature().toByteArray());
    } catch (SignatureException e) {
      throw new CertificateTransparencyException("Signature object not properly initialized or"
          + " signature from SCT is improperly encoded.", e);
    } catch (InvalidKeyException e) {
      throw new CertificateTransparencyException("Log's public key cannot be used", e);

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            signature.initVerify(key);


            signature.update(resp.getTbsResponseData().getEncoded(ASN1Encoding.DER));


            return signature.verify(this.getSignature());
        }
        catch (NoSuchProviderException e)
        {
            // TODO Why this special case?
            throw e;

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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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        sig.initVerify(pubKey);
        
        sig.update(cert.getTBSCertificate());
        
        if (!sig.verify(cert.getSignature()))
        {
            fail("EC certificate signature not mapped correctly.");
        }
        // System.out.println(cert);
    }

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        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(pubKey);


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


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

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        sig.initVerify(pubKey);


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


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

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