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/***** BEGIN LICENSE BLOCK *****
 * Version: CPL 1.0/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Common Public
 * License Version 1.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.eclipse.org/legal/cpl-v10.html
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * Copyright (C) 2006, 2007 Ola Bini 
 * 
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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package org.jruby.ext.openssl;

import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;
import java.io.IOException;
import java.io.StringWriter;
import java.security.GeneralSecurityException;
import java.security.PublicKey;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Set;
import org.bouncycastle.asn1.DERObject;
import org.bouncycastle.asn1.DERObjectIdentifier;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERSet;
import org.bouncycastle.asn1.DERString;
import org.jruby.Ruby;
import org.jruby.RubyArray;
import org.jruby.RubyClass;
import org.jruby.RubyModule;
import org.jruby.RubyNumeric;
import org.jruby.RubyObject;
import org.jruby.RubyString;
import org.jruby.anno.JRubyMethod;
import org.jruby.exceptions.RaiseException;
import org.jruby.ext.openssl.x509store.PEMInputOutput;
import org.jruby.runtime.Block;
import org.jruby.runtime.ObjectAllocator;
import org.jruby.runtime.builtin.IRubyObject;

/**
 * @author Ola Bini
 */
@SuppressWarnings("deprecation")
public class Request extends RubyObject {
    private static final long serialVersionUID = -5551557929791764918L;

    private static ObjectAllocator REQUEST_ALLOCATOR = new ObjectAllocator() {
        public IRubyObject allocate(Ruby runtime, RubyClass klass) {
            return new Request(runtime, klass);
        }
    };
    
    public static void createRequest(Ruby runtime, RubyModule mX509) {
        RubyClass cRequest = mX509.defineClassUnder("Request",runtime.getObject(),REQUEST_ALLOCATOR);
        RubyClass openSSLError = runtime.getModule("OpenSSL").getClass("OpenSSLError");
        mX509.defineClassUnder("RequestError",openSSLError,openSSLError.getAllocator());

        cRequest.defineAnnotatedMethods(Request.class);
    }

    private IRubyObject version;
    private IRubyObject subject;
    private IRubyObject public_key;
    private boolean valid = false;

    private List attrs;

    private PKCS10CertificationRequestExt req;

    public Request(Ruby runtime, RubyClass type) {
        super(runtime,type);
        attrs = new ArrayList();
    }

    @JRubyMethod(name="initialize", frame=true, rest=true)
    public IRubyObject _initialize(IRubyObject[] args, Block block) {
        if(org.jruby.runtime.Arity.checkArgumentCount(getRuntime(),args,0,1) == 0) {
            return this;
        }

        byte[] req_bytes = OpenSSLImpl.readX509PEM(args[0]);
        req = new PKCS10CertificationRequestExt(req_bytes);
        version = getRuntime().newFixnum(req.getVersion());

        String algo = null;
        byte[] enc = null;
        try {
            PublicKey pkey = (PublicKey) OpenSSLReal.getWithBCProvider(new OpenSSLReal.Callable() {

                public Object call() throws GeneralSecurityException {
                    return req.getPublicKey("BC");
                }
            });
            algo = pkey.getAlgorithm();
            enc = pkey.getEncoded();
        } catch (GeneralSecurityException gse) {
            throw newX509ReqError(getRuntime(), gse.getMessage());
        }

        if("RSA".equalsIgnoreCase(algo)) {
            this.public_key = Utils.newRubyInstance(getRuntime(), "OpenSSL::PKey::RSA", RubyString.newString(getRuntime(), enc));
        } else if("DSA".equalsIgnoreCase(algo)) {
            this.public_key = Utils.newRubyInstance(getRuntime(), "OpenSSL::PKey::DSA", RubyString.newString(getRuntime(), enc));
        } else {
            throw getRuntime().newLoadError("not implemented algo for public key: " + algo);
        }
        org.bouncycastle.asn1.x509.X509Name subName = req.getCertificationRequestInfo().getSubject();
        subject = Utils.newRubyInstance(getRuntime(), "OpenSSL::X509::Name");
        DERSequence subNameD = (DERSequence)subName.toASN1Object();
        for(int i=0;i iter = attrs.iterator();iter.hasNext();) {
            v1.add(((Attribute)iter.next()).toASN1());
        }
        try {
            // PKCS10CertificationRequestExt depends BC.
            OpenSSLReal.doWithBCProvider(new OpenSSLReal.Runnable() {

                public void run() throws GeneralSecurityException {
                    req = new PKCS10CertificationRequestExt(digAlg + "WITH" + keyAlg,
                            ((X509Name) subject).getRealName(),
                            ((PKey) public_key).getPublicKey(),
                            new DERSet(v1),
                            ((PKey) key).getPrivateKey(),
                            "BC");
                }
            });
        } catch (GeneralSecurityException gse) {
            throw newX509ReqError(getRuntime(), gse.getMessage());
        }
        req.setVersion(RubyNumeric.fix2int(version));
        valid = true;
        return this;
    }

    @JRubyMethod
    public IRubyObject verify(IRubyObject key) {
        try {
            return valid && req.verify(((PKey)(key.callMethod(getRuntime().getCurrentContext(),"public_key"))).getPublicKey()) ? getRuntime().getTrue() : getRuntime().getFalse();
        } catch(Exception e) {
            return getRuntime().getFalse();
        }
    }

    @JRubyMethod
    public IRubyObject attributes() {
        return getRuntime().newArray(attrs);
    }

    @SuppressWarnings("unchecked")
    @JRubyMethod(name="attributes=")
    public IRubyObject set_attributes(IRubyObject val) {
        valid = false;
        attrs.clear();
        attrs.addAll(((RubyArray)val).getList());
        if(req != null) {
            ASN1EncodableVector v1 = new ASN1EncodableVector();
            for(Iterator iter = attrs.iterator();iter.hasNext();) {
                v1.add(((Attribute)iter.next()).toASN1());
            }
            req.setAttributes(new DERSet(v1));
        }
        return val;
    }

    @JRubyMethod
    public IRubyObject add_attribute(IRubyObject val) {
        valid = false;
        attrs.add(val);
        if(req != null) {
            ASN1EncodableVector v1 = new ASN1EncodableVector();
            for(Iterator iter = attrs.iterator();iter.hasNext();) {
                v1.add(((Attribute)iter.next()).toASN1());
            }
            req.setAttributes(new DERSet(v1));
        }
        return getRuntime().getNil();
    }

    private static RaiseException newX509ReqError(Ruby runtime, String message) {
        return Utils.newError(runtime, "OpenSSL::X509::RequestError", message);
    }
}// Request