x509certificateobject.java

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            X509Extensions  extensions = c.getTBSCertificate().getExtensions();

            if (extensions != null)
            {
                Enumeration     e = extensions.oids();

                while (e.hasMoreElements())
                {
                    DERObjectIdentifier oid = (DERObjectIdentifier)e.nextElement();
                    X509Extension       ext = extensions.getExtension(oid);

                    if (ext.isCritical())
                    {
                        set.add(oid.getId());
                    }
                }

                return set;
            }
        }

        return null;
    }

    private byte[] getExtensionBytes(String oid)
    {
        X509Extensions exts = c.getTBSCertificate().getExtensions();

        if (exts != null)
        {
            X509Extension   ext = exts.getExtension(new DERObjectIdentifier(oid));
            if (ext != null)
            {
                return ext.getValue().getOctets();
            }
        }

        return null;
    }

    public byte[] getExtensionValue(String oid) 
    {
        X509Extensions exts = c.getTBSCertificate().getExtensions();

        if (exts != null)
        {
            X509Extension   ext = exts.getExtension(new DERObjectIdentifier(oid));

            if (ext != null)
            {
                try
                {
                    return ext.getValue().getEncoded();
                }
                catch (Exception e)
                {
                    throw new IllegalStateException("error parsing " + e.toString());
                }
            }
        }

        return null;
    }

    public Set getNonCriticalExtensionOIDs() 
    {
        if (this.getVersion() == 3)
        {
            Set             set = new HashSet();
            X509Extensions  extensions = c.getTBSCertificate().getExtensions();

            if (extensions != null)
            {
                Enumeration     e = extensions.oids();

                while (e.hasMoreElements())
                {
                    DERObjectIdentifier oid = (DERObjectIdentifier)e.nextElement();
                    X509Extension       ext = extensions.getExtension(oid);

                    if (!ext.isCritical())
                    {
                        set.add(oid.getId());
                    }
                }

                return set;
            }
        }

        return null;
    }

    public boolean hasUnsupportedCriticalExtension()
    {
        if (this.getVersion() == 3)
        {
            X509Extensions  extensions = c.getTBSCertificate().getExtensions();

            if (extensions != null)
            {
                Enumeration     e = extensions.oids();

                while (e.hasMoreElements())
                {
                    DERObjectIdentifier oid = (DERObjectIdentifier)e.nextElement();
                    String              oidId = oid.getId();

                    if (oidId.equals(RFC3280CertPathUtilities.KEY_USAGE)
                     || oidId.equals(RFC3280CertPathUtilities.CERTIFICATE_POLICIES)
                     || oidId.equals(RFC3280CertPathUtilities.POLICY_MAPPINGS)
                     || oidId.equals(RFC3280CertPathUtilities.INHIBIT_ANY_POLICY)
                     || oidId.equals(RFC3280CertPathUtilities.CRL_DISTRIBUTION_POINTS)
                     || oidId.equals(RFC3280CertPathUtilities.ISSUING_DISTRIBUTION_POINT)
                     || oidId.equals(RFC3280CertPathUtilities.DELTA_CRL_INDICATOR)
                     || oidId.equals(RFC3280CertPathUtilities.POLICY_CONSTRAINTS)
                     || oidId.equals(RFC3280CertPathUtilities.BASIC_CONSTRAINTS)
                     || oidId.equals(RFC3280CertPathUtilities.SUBJECT_ALTERNATIVE_NAME)
                     || oidId.equals(RFC3280CertPathUtilities.NAME_CONSTRAINTS))
                    {
                        continue;
                    }

                    X509Extension       ext = extensions.getExtension(oid);

                    if (ext.isCritical())
                    {
                        return true;
                    }
                }
            }
        }

        return false;
    }

    public PublicKey getPublicKey()
    {
        return JDKKeyFactory.createPublicKeyFromPublicKeyInfo(c.getSubjectPublicKeyInfo());
    }

    public byte[] getEncoded()
        throws CertificateEncodingException
    {
        ByteArrayOutputStream   bOut = new ByteArrayOutputStream();
        DEROutputStream         dOut = new DEROutputStream(bOut);

        try
        {
            dOut.writeObject(c);

            return bOut.toByteArray();
        }
        catch (IOException e)
        {
            throw new CertificateEncodingException(e.toString());
        }
    }

    public boolean equals(
        Object o)
    {
        if (o == this)
        {
            return true;
        }
        
        if (!(o instanceof Certificate))
        {
            return false;
        }

        Certificate other = (Certificate)o;
        
        try
        {
            byte[] b1 = this.getEncoded();
            byte[] b2 = other.getEncoded();
            
            return Arrays.areEqual(b1, b2);
        }
        catch (CertificateEncodingException e)
        {
            return false;
        }
    }
    
    public synchronized int hashCode()
    {
        if (!hashValueSet)
        {
            hashValue = calculateHashCode();
            hashValueSet = true;
        }

        return hashValue;
    }
    
    private int calculateHashCode()
    {
        try
        {
            return Arrays.hashCode(this.getEncoded());
        }
        catch (CertificateEncodingException e)
        {
            return 0;
        }
    }

    public void setBagAttribute(
        DERObjectIdentifier oid,
        DEREncodable        attribute)
    {
        attrCarrier.setBagAttribute(oid, attribute);
    }

    public DEREncodable getBagAttribute(
        DERObjectIdentifier oid)
    {
        return attrCarrier.getBagAttribute(oid);
    }

    public Enumeration getBagAttributeKeys()
    {
        return attrCarrier.getBagAttributeKeys();
    }

    public String toString()
    {
        StringBuffer    buf = new StringBuffer();
        String          nl = System.getProperty("line.separator");

        buf.append("  [0]         Version: ").append(this.getVersion()).append(nl);
        buf.append("         SerialNumber: ").append(this.getSerialNumber()).append(nl);
        buf.append("             IssuerDN: ").append(this.getIssuerDN()).append(nl);
        buf.append("           Start Date: ").append(this.getNotBefore()).append(nl);
        buf.append("           Final Date: ").append(this.getNotAfter()).append(nl);
        buf.append("            SubjectDN: ").append(this.getSubjectDN()).append(nl);
        buf.append("           Public Key: ").append(this.getPublicKey()).append(nl);
        buf.append("  Signature Algorithm: ").append(this.getSigAlgName()).append(nl);

        byte[]  sig = this.getSignature();

        buf.append("            Signature: ").append(new String(Hex.encode(sig, 0, 20))).append(nl);
        for (int i = 20; i < sig.length; i += 20)
        {
            if (i < sig.length - 20)
            {
                buf.append("                       ").append(new String(Hex.encode(sig, i, 20))).append(nl);
            }
            else
            {
                buf.append("                       ").append(new String(Hex.encode(sig, i, sig.length - i))).append(nl);
            }
        }

        X509Extensions  extensions = c.getTBSCertificate().getExtensions();

        if (extensions != null)
        {
            Enumeration     e = extensions.oids();

            if (e.hasMoreElements())
            {
                buf.append("       Extensions: \n");
            }

            while (e.hasMoreElements())
            {
                DERObjectIdentifier     oid = (DERObjectIdentifier)e.nextElement();
                X509Extension           ext = extensions.getExtension(oid);

                if (ext.getValue() != null)
                {
                    byte[]                  octs = ext.getValue().getOctets();
                    ASN1InputStream         dIn = new ASN1InputStream(octs);
                    buf.append("                       critical(").append(ext.isCritical()).append(") ");
                    try
                    {
                        if (oid.equals(X509Extensions.BasicConstraints))
                        {
                            buf.append(new BasicConstraints((ASN1Sequence)dIn.readObject())).append(nl);
                        }
                        else if (oid.equals(X509Extensions.KeyUsage))
                        {
                            buf.append(new KeyUsage((DERBitString)dIn.readObject())).append(nl);
                        }
                        else if (oid.equals(MiscObjectIdentifiers.netscapeCertType))
                        {
                            buf.append(new NetscapeCertType((DERBitString)dIn.readObject())).append(nl);
                        }
                        else if (oid.equals(MiscObjectIdentifiers.netscapeRevocationURL))
                        {
                            buf.append(new NetscapeRevocationURL((DERIA5String)dIn.readObject())).append(nl);
                        }
                        else if (oid.equals(MiscObjectIdentifiers.verisignCzagExtension))
                        {
                            buf.append(new VerisignCzagExtension((DERIA5String)dIn.readObject())).append(nl);
                        }
                        else 
                        {
                            buf.append(oid.getId());
                            buf.append(" value = ").append(ASN1Dump.dumpAsString(dIn.readObject())).append(nl);
                            //buf.append(" value = ").append("*****").append(nl);
                        }
                    }
                    catch (Exception ex)
                    {
                        buf.append(oid.getId());
                   //     buf.append(" value = ").append(new String(Hex.encode(ext.getValue().getOctets()))).append(nl);
                        buf.append(" value = ").append("*****").append(nl);
                    }
                }
                else
                {
                    buf.append(nl);
                }
            }
        }

        return buf.toString();
    }

    public final void verify(
        PublicKey   key)
        throws CertificateException, NoSuchAlgorithmException,
        InvalidKeyException, NoSuchProviderException, SignatureException
    {
        Signature   signature;
        String      sigName = X509SignatureUtil.getSignatureName(c.getSignatureAlgorithm());
        
        try
        {
            signature = Signature.getInstance(sigName, "BC");
        }
        catch (Exception e)
        {
            signature = Signature.getInstance(sigName);
        }
        
        checkSignature(key, signature);
    }
    
    public final void verify(
        PublicKey   key,
        String      sigProvider)
        throws CertificateException, NoSuchAlgorithmException,
        InvalidKeyException, NoSuchProviderException, SignatureException
    {
        String    sigName = X509SignatureUtil.getSignatureName(c.getSignatureAlgorithm());
        Signature signature = Signature.getInstance(sigName, sigProvider);
        
        checkSignature(key, signature);
    }

    private void checkSignature(
        PublicKey key, 
        Signature signature) 
        throws CertificateException, NoSuchAlgorithmException, 
            SignatureException, InvalidKeyException
    {
        if (!c.getSignatureAlgorithm().equals(c.getTBSCertificate().getSignature()))
        {
            throw new CertificateException("signature algorithm in TBS cert not same as outer cert");
        }

        DEREncodable params = c.getSignatureAlgorithm().getParameters();

        // TODO This should go after the initVerify?
        X509SignatureUtil.setSignatureParameters(signature, params);

        signature.initVerify(key);

        signature.update(this.getTBSCertificate());

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