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jeremybenn |
/* SFHelper -- A .SF file helper
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Copyright (C) 2006, 2007 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.classpath.tools.jarsigner;
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import gnu.classpath.Configuration;
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import gnu.java.security.OID;
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import gnu.java.security.Registry;
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import gnu.java.security.der.DER;
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import gnu.java.security.der.DERValue;
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import gnu.java.security.pkcs.PKCS7Data;
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import gnu.java.security.pkcs.PKCS7SignedData;
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import gnu.java.security.pkcs.SignerInfo;
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import gnu.java.security.sig.ISignature;
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import gnu.java.security.sig.ISignatureCodec;
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import gnu.java.security.sig.dss.DSSSignature;
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import gnu.java.security.sig.dss.DSSSignatureX509Codec;
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import gnu.java.security.sig.rsa.RSAPKCS1V1_5Signature;
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import gnu.java.security.sig.rsa.RSAPKCS1V1_5SignatureX509Codec;
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import gnu.java.security.util.Util;
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import gnu.java.util.jar.JarUtils;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.math.BigInteger;
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import java.security.PrivateKey;
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import java.security.cert.CRLException;
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import java.security.cert.Certificate;
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import java.security.cert.CertificateEncodingException;
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import java.security.cert.CertificateExpiredException;
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import java.security.cert.CertificateNotYetValidException;
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import java.security.cert.X509CRL;
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import java.security.interfaces.DSAPrivateKey;
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import java.security.interfaces.RSAPrivateKey;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import java.util.jar.Attributes;
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import java.util.jar.JarEntry;
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import java.util.jar.JarFile;
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import java.util.jar.JarOutputStream;
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import java.util.jar.Manifest;
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import java.util.logging.Logger;
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import javax.security.auth.x500.X500Principal;
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import java.security.cert.X509Certificate;
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/**
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* A helper class for the .SF file found in signed jars.
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*/
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public class SFHelper
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{
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private static final Logger log = Logger.getLogger(SFHelper.class.getName());
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private static final int READY = 0;
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private static final int STARTED = 1;
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private static final int FINISHED = 2;
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private static final int SF_GENERATED = 3;
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private static final int DSA_GENERATED = 4;
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/** http://asn1.elibel.tm.fr/cgi-bin/oid/display?oid=1.3.14.3.2.26&action=display */
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private static final OID hashAlgorithmIdentifierSHA1 = new OID("1.3.14.3.2.26"); //$NON-NLS-1$
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private int state;
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private JarFile jar;
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private Manifest manifest;
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private Attributes sfMainAttributes;
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private Map<String, Attributes> sfEntries;
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private byte[] sfBytes;
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private HashUtils util;
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/**
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* @param jar the JAR archive the .SF file belongs to.
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*/
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public SFHelper(JarFile jar)
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{
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super();
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this.jar = jar;
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this.state = READY;
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}
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/**
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* Writes the contents of the <code>.SF</code> file to the designated JAR
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* output stream. Line-endings are platform-independent and consist of the
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* 2-codepoint sequence <code>0x0D</code> and <code>0x0A</code>.
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*
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* @param jar the JAR output stream to write a <code>.SF</code> file to.
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* @throws IOException if an I/O related exception occurs during the process.
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*/
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void writeSF(JarOutputStream jar) throws IOException
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{
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if (this.state != FINISHED)
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throw new IllegalStateException(Messages.getString("SFHelper.1")); //$NON-NLS-1$
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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JarUtils.writeSFManifest(sfMainAttributes, sfEntries, baos);
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sfBytes = baos.toByteArray();
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if (Configuration.DEBUG)
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log.fine("\n" + Util.dumpString(sfBytes, "+++ sfBytes ")); //$NON-NLS-1$ //$NON-NLS-2$
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jar.write(sfBytes);
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jar.flush();
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this.state = SF_GENERATED;
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}
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/**
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* The contents of the .DSA file is the DER encoded form of a PKCS#7
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* ContentInfo of the type SignedData.
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* <p>
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* The ContentInfo ASN.1 syntax is as described in the "PKCS#7 Cryptographic
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* Message Syntax Standard" (RSA Labs) specifications:
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* <pre>
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* ContentInfo ::= SEQUENCE {
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* contentType ContentType,
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* content [0] EXPLICIT ANY DEFINED BY contentType OPTIONAL
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* }
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*
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* ContentType ::= OBJECT IDENTIFIER
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* </pre>
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* <p>
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* The ContentType is an OID which determines the type of the contents field
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* that follows it. For the .DSA file the OID is "1.2.840.113549.1.7.2", while
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* the content field is the byte array representing the DER encoded form of a
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* SignedData content-type. The ASN.1 syntax of the SignedData type is as
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* follows:
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* <pre>
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* SignedData ::= SEQUENCE {
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* version Version, -- always 1 for PKCS#7 1.5
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* digestAlgorithms DigestAlgorithmIdentifiers,
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* contentInfo ContentInfo,
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* certificates [0] IMPLICIT ExtendedCertificatesAndCertificates OPTIONAL,
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* crls [1] IMPLICIT CertificateRevocationLists OPTIONAL,
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* signerInfos SignerInfos
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* }
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*
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* DigestAlgorithmIdentifiers ::= SET OF DigestAlgorithmIdentifier
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*
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* SignerInfos ::= SET OF SignerInfo
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* </pre>
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* <p>
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* Finally the SignerInfo is a per-signer structure. Its ASN.1 syntax looks
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* like so:
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* <pre>
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* SignerInfo ::= SEQUENCE {
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* version Version, -- always 1 for PKCS#7 1.5
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* issuerAndSerialNumber IssuerAndSerialNumber,
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* digestAlgorithm DigestAlgorithmIdentifier,
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* authenticatedAttributes [0] IMPLICIT Attributes OPTIONAL,
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* digestEncryptionAlgorithm DigestEncryptionAlgorithmIdentifier,
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* encryptedDigest EncryptedDigest,
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* unauthenticatedAttributes [1] IMPLICIT Attributes OPTIONAL
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* }
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*
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* EncryptedDigest ::= OCTET STRING
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* </pre>
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*
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* @param jar the JAR output stream to write a <code>.DSA</code> file to.
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* @param signerKey the private key to sign with.
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* @param certificates the possibly null signer certificate chain.
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* @param internalSF if <code>true</code> then include the .SF file contents
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* in the signed .DSA file; otherwise don't.
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* @throws IOException if an I/O related exception occurs during the process.
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* @throws CRLException
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* @throws CertificateEncodingException
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*/
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void writeDSA(JarOutputStream jar, PrivateKey signerKey,
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Certificate[] certificates, boolean internalSF)
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throws IOException, CertificateEncodingException, CRLException
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{
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if (this.state != SF_GENERATED)
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throw new IllegalStateException(Messages.getString("SFHelper.4")); //$NON-NLS-1$
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if (Configuration.DEBUG)
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log.fine("+++ signer private key = " + signerKey); //$NON-NLS-1$
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ISignature signatureAlgorithm;
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ISignatureCodec signatureCodec;
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OID digestEncryptionAlgorithmOID;
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if (signerKey instanceof DSAPrivateKey)
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{
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signatureAlgorithm = new DSSSignature();
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signatureCodec = new DSSSignatureX509Codec();
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digestEncryptionAlgorithmOID = Main.DSA_SIGNATURE_OID;
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}
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else if (signerKey instanceof RSAPrivateKey)
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{
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signatureAlgorithm = new RSAPKCS1V1_5Signature(Registry.MD5_HASH);
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signatureCodec = new RSAPKCS1V1_5SignatureX509Codec();
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digestEncryptionAlgorithmOID = Main.RSA_SIGNATURE_OID;
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}
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else
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throw new SecurityException(Messages.getString("SFHelper.6")); //$NON-NLS-1$
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Map signatureAttributes = new HashMap();
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signatureAttributes.put(ISignature.SIGNER_KEY, signerKey);
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signatureAlgorithm.setupSign(signatureAttributes);
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signatureAlgorithm.update(sfBytes, 0, sfBytes.length);
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Object signature = signatureAlgorithm.sign();
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byte[] signedSFBytes = signatureCodec.encodeSignature(signature);
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if (Configuration.DEBUG)
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log.fine("\n" + Util.dumpString(signedSFBytes, "+++ signedSFBytes ")); //$NON-NLS-1$ //$NON-NLS-2$
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Set<DERValue> digestAlgorithms = new HashSet<DERValue>();
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List<DERValue> digestAlgorithm = new ArrayList<DERValue>(2);
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DERValue derDigestAlgorithmOID = new DERValue(DER.OBJECT_IDENTIFIER,
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hashAlgorithmIdentifierSHA1);
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DERValue derDigestAlgorithmParams = new DERValue(DER.NULL, null);
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digestAlgorithm.add(derDigestAlgorithmOID);
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digestAlgorithm.add(derDigestAlgorithmParams);
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DERValue derDigestAlgorithm = new DERValue(DER.CONSTRUCTED | DER.SEQUENCE,
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digestAlgorithm);
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digestAlgorithms.add(derDigestAlgorithm);
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// TODO (rsn): test with internalsf == true
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PKCS7Data data = internalSF ? new PKCS7Data(sfBytes) : null;
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X509CRL[] crls = null;
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Set<SignerInfo> signerInfos = new HashSet<SignerInfo>();
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X509Certificate cert = (X509Certificate) certificates[0];
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try
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{
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cert.checkValidity();
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}
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catch (CertificateExpiredException x)
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{
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String issuerName = getIssuerName(cert);
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String subjectName = getSubjectName(cert);
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Date notAfterDate = getNotAfterDate(cert);
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System.out.println(Messages.getFormattedString("SFHelper.0", //$NON-NLS-1$
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new Object[] { issuerName,
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subjectName,
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notAfterDate }));
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}
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catch (CertificateNotYetValidException x)
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{
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String issuerName = getIssuerName(cert);
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String subjectName = getSubjectName(cert);
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Date notBeforeDate = getNotBeforeDate(cert);
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System.out.println(Messages.getFormattedString("SFHelper.11", //$NON-NLS-1$
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new Object[] { issuerName,
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subjectName,
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notBeforeDate }));
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}
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X500Principal issuer = cert.getIssuerX500Principal();
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BigInteger serialNumber = cert.getSerialNumber();
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byte[] authenticatedAttributes = null;
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byte[] encryptedDigest = signedSFBytes;
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byte[] unauthenticatedAttributes = null;
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SignerInfo signerInfo = new SignerInfo(issuer,
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serialNumber,
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hashAlgorithmIdentifierSHA1,
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authenticatedAttributes,
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digestEncryptionAlgorithmOID,
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encryptedDigest,
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unauthenticatedAttributes);
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signerInfos.add(signerInfo);
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PKCS7SignedData dsaContents = new PKCS7SignedData(digestAlgorithms,
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data,
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certificates,
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crls,
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signerInfos);
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dsaContents.encode(jar);
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jar.flush();
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this.state = DSA_GENERATED;
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}
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Manifest getManifest()
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{
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return this.manifest;
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}
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void startSigning() throws IOException
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{
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if (this.state != READY)
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throw new IllegalStateException(Messages.getString("SFHelper.9")); //$NON-NLS-1$
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Manifest oldManifest = jar.getManifest();
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this.manifest = oldManifest == null ? new Manifest()
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: new Manifest(oldManifest);
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this.sfMainAttributes = new Attributes();
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this.sfEntries = new HashMap<String, Attributes>();
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util = new HashUtils();
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this.state = STARTED;
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}
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/**
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* Hashes the designated JAR entry (the file itself); adds the resulting hash
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* as an attribute to the manifest, and computes the hash of the added (to
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* the Manifest) two headers and add the result as an attribute of the
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* corresponding entry in the .SF file.
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*/
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void updateEntry(JarEntry entry) throws IOException
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335 |
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{
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if (this.state != STARTED)
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throw new IllegalStateException(Messages.getString("SFHelper.10")); //$NON-NLS-1$
|
338 |
|
|
|
339 |
|
|
String name = entry.getName();
|
340 |
|
|
InputStream jeis = jar.getInputStream(entry);
|
341 |
|
|
String hash = util.hashStream(jeis);
|
342 |
|
|
if (Configuration.DEBUG)
|
343 |
|
|
log.fine("Hash of " + name + " = " + hash); //$NON-NLS-1$ //$NON-NLS-2$
|
344 |
|
|
|
345 |
|
|
Attributes mainfestAttributes = manifest.getAttributes(name);
|
346 |
|
|
if (mainfestAttributes == null)
|
347 |
|
|
{
|
348 |
|
|
mainfestAttributes = new Attributes();
|
349 |
|
|
manifest.getEntries().put(name, mainfestAttributes);
|
350 |
|
|
}
|
351 |
|
|
|
352 |
|
|
mainfestAttributes.putValue(Main.DIGEST, hash);
|
353 |
|
|
|
354 |
|
|
// hash the newly added 2-header block and add it as an attribute to .SF
|
355 |
|
|
|
356 |
|
|
String sfHash = util.hashManifestEntry(name, hash);
|
357 |
|
|
Attributes sfAttributes = sfEntries.get(name);
|
358 |
|
|
if (sfAttributes == null)
|
359 |
|
|
{
|
360 |
|
|
sfAttributes = new Attributes();
|
361 |
|
|
sfEntries.put(name, sfAttributes);
|
362 |
|
|
}
|
363 |
|
|
|
364 |
|
|
sfAttributes.putValue(Main.DIGEST, sfHash);
|
365 |
|
|
if (Configuration.DEBUG)
|
366 |
|
|
{
|
367 |
|
|
log.fine("Name: " + name); //$NON-NLS-1$
|
368 |
|
|
log.fine(Main.DIGEST + ": " + sfHash); //$NON-NLS-1$
|
369 |
|
|
log.fine(""); //$NON-NLS-1$
|
370 |
|
|
}
|
371 |
|
|
}
|
372 |
|
|
|
373 |
|
|
/**
|
374 |
|
|
* @param sectionsOnly whether to compute, in addition to the files, the hash
|
375 |
|
|
* of the mainfest itself (<code>false</code>) or not (<code>true</code>).
|
376 |
|
|
*/
|
377 |
|
|
void finishSigning(boolean sectionsOnly) throws IOException
|
378 |
|
|
{
|
379 |
|
|
if (state != STARTED)
|
380 |
|
|
throw new IllegalStateException(Messages.getString("SFHelper.10")); //$NON-NLS-1$
|
381 |
|
|
|
382 |
|
|
if (sectionsOnly)
|
383 |
|
|
return;
|
384 |
|
|
|
385 |
|
|
ByteArrayOutputStream baos = new ByteArrayOutputStream();
|
386 |
|
|
manifest.write(baos);
|
387 |
|
|
baos.flush();
|
388 |
|
|
String manifestHash = util.hashByteArray(baos.toByteArray());
|
389 |
|
|
if (Configuration.DEBUG)
|
390 |
|
|
log.fine("Hashed Manifest " + manifestHash); //$NON-NLS-1$
|
391 |
|
|
sfMainAttributes.putValue(Main.DIGEST_MANIFEST, manifestHash);
|
392 |
|
|
|
393 |
|
|
this.state = FINISHED;
|
394 |
|
|
}
|
395 |
|
|
|
396 |
|
|
/**
|
397 |
|
|
* Given an X.509 certificate this method returns the string representation of
|
398 |
|
|
* the Issuer Distinguished Name.
|
399 |
|
|
*
|
400 |
|
|
* @param cert an X.509 certificate.
|
401 |
|
|
* @return the string representation of the Issuer's DN.
|
402 |
|
|
*/
|
403 |
|
|
private String getIssuerName(X509Certificate cert)
|
404 |
|
|
{
|
405 |
|
|
X500Principal xp = cert.getIssuerX500Principal();
|
406 |
|
|
if (xp == null)
|
407 |
|
|
{
|
408 |
|
|
if (Configuration.DEBUG)
|
409 |
|
|
log.fine("Certiticate, with serial number " + cert.getSerialNumber() //$NON-NLS-1$
|
410 |
|
|
+ ", has null Issuer. Return [unknown]"); //$NON-NLS-1$
|
411 |
|
|
return Messages.getString("SFHelper.14"); //$NON-NLS-1$
|
412 |
|
|
}
|
413 |
|
|
String result = xp.getName();
|
414 |
|
|
if (result == null)
|
415 |
|
|
{
|
416 |
|
|
if (Configuration.DEBUG)
|
417 |
|
|
log.fine("Certiticate, with serial number " + cert.getSerialNumber() //$NON-NLS-1$
|
418 |
|
|
+ ", has an Issuer with null DN. Return [unnamed]"); //$NON-NLS-1$
|
419 |
|
|
return Messages.getString("SFHelper.17"); //$NON-NLS-1$
|
420 |
|
|
}
|
421 |
|
|
return result;
|
422 |
|
|
}
|
423 |
|
|
|
424 |
|
|
/**
|
425 |
|
|
* Given an X.509 certificate this method returns the string representation of
|
426 |
|
|
* the Subject Distinguished Name.
|
427 |
|
|
*
|
428 |
|
|
* @param cert an X.509 certificate.
|
429 |
|
|
* @return the string representation of the Subject's DN.
|
430 |
|
|
*/
|
431 |
|
|
private String getSubjectName(X509Certificate cert)
|
432 |
|
|
{
|
433 |
|
|
X500Principal xp = cert.getSubjectX500Principal();
|
434 |
|
|
if (xp == null)
|
435 |
|
|
{
|
436 |
|
|
if (Configuration.DEBUG)
|
437 |
|
|
log.fine("Certiticate, with serial number " + cert.getSerialNumber() //$NON-NLS-1$
|
438 |
|
|
+ ", has null Subject. Return [unknown]"); //$NON-NLS-1$
|
439 |
|
|
return Messages.getString("SFHelper.14"); //$NON-NLS-1$
|
440 |
|
|
}
|
441 |
|
|
String result = xp.getName();
|
442 |
|
|
if (result == null)
|
443 |
|
|
{
|
444 |
|
|
if (Configuration.DEBUG)
|
445 |
|
|
log.fine("Certiticate, with serial number " + cert.getSerialNumber() //$NON-NLS-1$
|
446 |
|
|
+ ", has a Subject with null DN. Return [unnamed]"); //$NON-NLS-1$
|
447 |
|
|
return Messages.getString("SFHelper.17"); //$NON-NLS-1$
|
448 |
|
|
}
|
449 |
|
|
return result;
|
450 |
|
|
}
|
451 |
|
|
|
452 |
|
|
/**
|
453 |
|
|
* Given an X.509 certificate this method returns the end validity date of
|
454 |
|
|
* this certificate.
|
455 |
|
|
*
|
456 |
|
|
* @param cert an X.509 certificate.
|
457 |
|
|
* @return the date when this certificate stops being valid.
|
458 |
|
|
*/
|
459 |
|
|
private Date getNotAfterDate(X509Certificate cert)
|
460 |
|
|
{
|
461 |
|
|
Date result = cert.getNotAfter();
|
462 |
|
|
if (result == null)
|
463 |
|
|
{
|
464 |
|
|
if (Configuration.DEBUG)
|
465 |
|
|
log.fine("Certiticate, with serial number " + cert.getSerialNumber() //$NON-NLS-1$
|
466 |
|
|
+ ", has null start-validity date. Return epoch"); //$NON-NLS-1$
|
467 |
|
|
return new Date(0);
|
468 |
|
|
}
|
469 |
|
|
return result;
|
470 |
|
|
}
|
471 |
|
|
|
472 |
|
|
/**
|
473 |
|
|
* Given an X.509 certificate this method returns the start validity date of
|
474 |
|
|
* this certificate.
|
475 |
|
|
*
|
476 |
|
|
* @param cert an X.509 certificate.
|
477 |
|
|
* @return the date when this certificate starts being valid.
|
478 |
|
|
*/
|
479 |
|
|
private Date getNotBeforeDate(X509Certificate cert)
|
480 |
|
|
{
|
481 |
|
|
Date result = cert.getNotBefore();
|
482 |
|
|
if (result == null)
|
483 |
|
|
{
|
484 |
|
|
if (Configuration.DEBUG)
|
485 |
|
|
log.fine("Certiticate, with serial number " + cert.getSerialNumber() //$NON-NLS-1$
|
486 |
|
|
+ ", has null end-validity date. Return epoch"); //$NON-NLS-1$
|
487 |
|
|
return new Date(0);
|
488 |
|
|
}
|
489 |
|
|
return result;
|
490 |
|
|
}
|
491 |
|
|
}
|