Examples of java.security.cert.Certificate.verify()

java.security.cert.Certificate.verify()
Verifies that this certificate was signed using the private key that corresponds to the specified public key. @param key the PublicKey used to carry out the verification. @exception NoSuchAlgorithmException on unsupported signaturealgorithms. @exception InvalidKeyException on incorrect key. @exception NoSuchProviderException if there's no default provider. @exception SignatureException on signature errors. @exception CertificateException on encoding errors.


            Certificate cert = fact.generateCertificate(bIn);


            PublicKey    k = cert.getPublicKey();


            cert.verify(k);
            // System.out.println(cert);
        }
        catch (Exception e)
        {
            fail(dump + System.getProperty("line.separator") + getName() + ": "+ id + " failed - exception " + e.toString(), e);

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    public Certificate issueCertificate(X500Principal subject, PublicKey publicKey, BigInteger sNo, Date validFromDate, Date validToDate, String algorithm) throws CertificationAuthorityException{
        if(isLocked()) throw new CertificationAuthorityException("CA is locked.");
        try {
            X509Name subName = CaUtils.getX509Name(subject);
            Certificate cert = issueCertificate(subName, caName, sNo, publicKey, caPrivateKey, validFromDate, validToDate, algorithm);
            cert.verify(caPublicKey);
            certStore.storeCertificate(cert);
            return cert;
        } catch(Exception e) {
            throw new CertificationAuthorityException("Error in issuing certificate.", e);
        }

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    public Certificate issueCertificate(X500Principal subject, PublicKey publicKey, BigInteger sNo, Date validFromDate, Date validToDate, String algorithm) throws CertificationAuthorityException{
        if(isLocked()) throw new CertificationAuthorityException("CA is locked.");
        try {
            X509Name subName = CaUtils.getX509Name(subject);
            Certificate cert = issueCertificate(subName, caName, sNo, publicKey, caPrivateKey, validFromDate, validToDate, algorithm);
            cert.verify(caPublicKey);
            certStore.storeCertificate(cert);
            return cert;
        } catch(Exception e) {
            throw new CertificationAuthorityException("Error in issuing certificate.", e);
        }

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    public Certificate issueCertificate(X500Principal subject, PublicKey publicKey, BigInteger sNo, Date validFromDate, Date validToDate, String algorithm) throws CertificationAuthorityException{
        if(isLocked()) throw new CertificationAuthorityException("CA is locked.");
        try {
            X509Name subName = CaUtils.getX509Name(subject);
            Certificate cert = issueCertificate(subName, caName, sNo, publicKey, caPrivateKey, validFromDate, validToDate, algorithm);
            cert.verify(caPublicKey);
            certStore.storeCertificate(cert);
            return cert;
        } catch(Exception e) {
            throw new CertificationAuthorityException("Error in issuing certificate.", e);
        }

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               CertificateException,
               NoSuchAlgorithmException,
               NoSuchProviderException,
               SignatureException {
        Certificate c1 = new MyCertificate("TEST_TYPE", testEncoding);
        c1.verify(null);
    }


    /**
     * This test just calls <code>verify(PublicKey,String)</code> method<br>
     *

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               CertificateException,
               NoSuchAlgorithmException,
               NoSuchProviderException,
               SignatureException {
        Certificate c1 = new MyCertificate("TEST_TYPE", testEncoding);
        c1.verify(null, null);
    }


    /**
     * This test just calls <code>toString()</code> method<br>
     */

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    KeyStore keyStore = KeyStore.getInstance(KEYSTORE_TYPE);
    keyStore.load(new FileInputStream(keyStoreFile), PASSWORD_CHARS);
    Certificate cert = CertUtils.findCert(keyStore);


    cert.verify(cert.getPublicKey()); // throws exception if it can't be verified
  }


  @Test
  public void createPublicSelfSigned() throws Exception {
    CertUtils certUtils = getUtils();

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      fail("expected not to find private key in keystore");
    } catch (KeyStoreException e) {
      assertTrue(e.getMessage().contains("private key"));
    }
    Certificate cert = CertUtils.findCert(keyStore);
    cert.verify(cert.getPublicKey()); // throws exception if it can't be verified
  }


  @Test
  public void createSigned() throws Exception {
    CertUtils certUtils = getUtils();

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    KeyStore signedKeyStore = KeyStore.getInstance(KEYSTORE_TYPE);
    signedKeyStore.load(new FileInputStream(signedKeyStoreFile), PASSWORD_CHARS);
    Certificate signedCert = CertUtils.findCert(signedKeyStore);


    try {
      signedCert.verify(signedCert.getPublicKey());
      fail("signed cert should not be able to verify itself");
    } catch (SignatureException e) {
      // expected
    }

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      fail("signed cert should not be able to verify itself");
    } catch (SignatureException e) {
      // expected
    }


    signedCert.verify(rootCert.getPublicKey()); // throws exception if it can't be verified
  }


  @Test
  public void publicOnlyVerfication() throws Exception {
    // this approximates the real life scenario. the client will only have the public key of each

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