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From-SVN: r102074
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Tom Tromey
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364
libjava/classpath/gnu/java/security/pkcs/PKCS7SignedData.java
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364
libjava/classpath/gnu/java/security/pkcs/PKCS7SignedData.java
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/* PKCS7SignedData.java -- reader for PKCS#7 signedData objects
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Copyright (C) 2004, 2005 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.java.security.pkcs;
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import gnu.java.security.OID;
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import gnu.java.security.ber.BER;
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import gnu.java.security.ber.BEREncodingException;
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import gnu.java.security.ber.BERReader;
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import gnu.java.security.ber.BERValue;
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import gnu.java.security.der.DERValue;
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import java.io.ByteArrayInputStream;
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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.cert.CRL;
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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.CertificateException;
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import java.security.cert.CertificateFactory;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Set;
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/**
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* The SignedData object in PKCS #7. This is a read-only implementation of
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* this format, and is used to provide signed Jar file support.
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*
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* @author Casey Marshall (csm@gnu.org)
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*/
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public class PKCS7SignedData
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{
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public static final OID PKCS7_DATA = new OID("1.2.840.113549.1.7.1");
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public static final OID PKCS7_SIGNED_DATA = new OID("1.2.840.113549.1.7.2");
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private BigInteger version;
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private Set digestAlgorithms;
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private OID contentType;
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private byte[] content;
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private Certificate[] certificates;
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private CRL[] crls;
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private Set signerInfos;
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private static final boolean DEBUG = false;
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private static void debug(String msg)
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{
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System.err.print("PKCS7SignedData >> ");
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System.err.println(msg);
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}
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public PKCS7SignedData(InputStream in)
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throws CRLException, CertificateException, IOException
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{
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this(new BERReader(in));
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}
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/**
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* Parse an encoded PKCS#7 SignedData object. The ASN.1 format of this
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* object is:
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*
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* <pre>
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* SignedData ::= SEQUENCE {
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* version Version,
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* digestAlgorithms DigestAlgorithmIdentifiers,
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* contentInfo ContentInfo,
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* certificates
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* [0] IMPLICIT ExtendedCertificatesAndCertificates OPTIONAL,
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* crls
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* [1] IMPLICIT CertificateRevocationLists OPTIONAL,
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* signerInfos SignerInfos }
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*
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* Version ::= INTEGER
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*
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* DigestAlgorithmIdentifiers ::= SET OF DigestAlgorithmIdentifier
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*
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* DigestAlgorithmIdentifier ::= AlgorithmIdentifier
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*
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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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* ContentType ::= OBJECT IDENTIFIER
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*
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* ExtendedCertificatesAndCertificates ::=
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* SET OF ExtendedCertificatesAndCertificate
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*
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* ExtendedCertificatesAndCertificate ::= CHOICE {
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* certificate Certificate, -- from X.509
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* extendedCertificate [0] IMPLICIT ExtendedCertificate }
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*
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* CertificateRevocationLists ::= SET OF CertificateRevocationList
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* -- from X.509
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*
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* SignerInfos ::= SET OF SignerInfo
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*
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* SignerInfo ::= SEQUENCE {
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* version Version,
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* issuerAndSerialNumber IssuerAndSerialNumber,
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* digestAlgorithm DigestAlgorithmIdentifier,
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* authenticatedAttributes
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* [0] IMPLICIT Attributes OPTIONAL,
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* digestEncryptionAlgorithm DigestEncryptionAlgorithmIdentifier,
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* encryptedDigest EncryptedDigest,
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* unauthenticatedAttributes
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* [1] IMPLICIT Attributes OPTIONAL }
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*
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* EncryptedDigest ::= OCTET STRING
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* </pre>
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*
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* <p>(Readers who are confused as to why it takes 40 levels of indirection
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* to specify "data with a signature", rest assured that the present author
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* is as confused as you are).</p>
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*/
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public PKCS7SignedData(BERReader ber)
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throws CRLException, CertificateException, IOException
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{
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CertificateFactory x509 = CertificateFactory.getInstance("X509");
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DERValue val = ber.read();
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if (!val.isConstructed())
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throw new BEREncodingException("malformed ContentInfo");
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val = ber.read();
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if (val.getTag() != BER.OBJECT_IDENTIFIER)
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throw new BEREncodingException("malformed ContentType");
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if (!PKCS7_SIGNED_DATA.equals(val.getValue()))
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throw new BEREncodingException("content is not SignedData");
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val = ber.read();
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if (val.getTag() != 0)
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throw new BEREncodingException("malformed Content");
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val = ber.read();
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if (!val.isConstructed())
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throw new BEREncodingException("malformed SignedData");
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if (DEBUG)
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debug("SignedData: " + val);
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val = ber.read();
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if (val.getTag() != BER.INTEGER)
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throw new BEREncodingException("expecting Version");
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version = (BigInteger) val.getValue();
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if (DEBUG)
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debug(" Version: " + version);
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digestAlgorithms = new HashSet();
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val = ber.read();
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if (!val.isConstructed())
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throw new BEREncodingException("malformed DigestAlgorithmIdentifiers");
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if (DEBUG)
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debug(" DigestAlgorithmIdentifiers: " + val);
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int count = 0;
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DERValue val2 = ber.read();
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while (val2 != BER.END_OF_SEQUENCE &&
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(val.getLength() > 0 && val.getLength() > count))
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{
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if (!val2.isConstructed())
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throw new BEREncodingException("malformed AlgorithmIdentifier");
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if (DEBUG)
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debug(" AlgorithmIdentifier: " + val2);
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count += val2.getEncodedLength();
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val2 = ber.read();
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if (val2.getTag() != BER.OBJECT_IDENTIFIER)
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throw new BEREncodingException("malformed AlgorithmIdentifier");
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if (DEBUG)
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debug(" ID: " + val2.getValue());
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List algId = new ArrayList(2);
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algId.add(val2.getValue());
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val2 = ber.read();
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if (val2 != BER.END_OF_SEQUENCE)
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{
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count += val2.getEncodedLength();
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if (val2.getTag() == BER.NULL)
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algId.add(null);
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else
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algId.add(val2.getEncoded());
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if (DEBUG)
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debug(" params: " + new BigInteger(1, val2.getEncoded()).toString(16));
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if (val2.isConstructed())
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ber.skip(val2.getLength());
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if (BERValue.isIndefinite(val))
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val2 = ber.read();
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}
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else
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algId.add(null);
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digestAlgorithms.add(algId);
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}
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val = ber.read();
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if (!val.isConstructed())
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throw new BEREncodingException("malformed ContentInfo");
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if (DEBUG)
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debug(" ContentInfo: " + val);
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val2 = ber.read();
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if (val2.getTag() != BER.OBJECT_IDENTIFIER)
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throw new BEREncodingException("malformed ContentType");
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contentType = (OID) val2.getValue();
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if (DEBUG)
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debug(" ContentType: " + contentType);
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if (BERValue.isIndefinite(val)
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|| (val.getLength() > 0 && val.getLength() > val2.getEncodedLength()))
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{
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val2 = ber.read();
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if (val2 != BER.END_OF_SEQUENCE)
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{
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content = val2.getEncoded();
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if (BERValue.isIndefinite(val))
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val2 = ber.read();
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if (DEBUG)
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debug(" Content: " + new BigInteger(1, content).toString(16));
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}
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}
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val = ber.read();
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if (val.getTag() == 0)
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{
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if (!val.isConstructed())
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throw new BEREncodingException("malformed ExtendedCertificatesAndCertificates");
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if (DEBUG)
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debug(" ExtendedCertificatesAndCertificates: " + val);
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count = 0;
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val2 = ber.read();
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List certs = new LinkedList();
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while (val2 != BER.END_OF_SEQUENCE &&
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(val.getLength() > 0 && val.getLength() > count))
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{
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Certificate cert =
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x509.generateCertificate(new ByteArrayInputStream(val2.getEncoded()));
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if (DEBUG)
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debug(" Certificate: " + cert);
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certs.add(cert);
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count += val2.getEncodedLength();
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ber.skip(val2.getLength());
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if (BERValue.isIndefinite(val) || val.getLength() > count)
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val2 = ber.read();
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}
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certificates = (Certificate[]) certs.toArray(new Certificate[certs.size()]);
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val = ber.read();
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}
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if (val.getTag() == 1)
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{
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if (!val.isConstructed())
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throw new BEREncodingException("malformed CertificateRevocationLists");
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if (DEBUG)
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debug(" CertificateRevocationLists: " + val);
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count = 0;
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val2 = ber.read();
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List crls = new LinkedList();
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while (val2 != BER.END_OF_SEQUENCE &&
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(val.getLength() > 0 && val.getLength() > count))
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{
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CRL crl = x509.generateCRL(new ByteArrayInputStream(val2.getEncoded()));
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if (DEBUG)
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debug (" CRL: " + crl);
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crls.add(crl);
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count += val2.getEncodedLength();
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ber.skip(val2.getLength());
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if (BERValue.isIndefinite(val) || val.getLength() > count)
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val2 = ber.read();
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}
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this.crls = (CRL[]) crls.toArray(new CRL[crls.size()]);
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val = ber.read();
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}
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signerInfos = new HashSet();
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if (!val.isConstructed())
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throw new BEREncodingException("malformed SignerInfos");
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if (DEBUG)
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debug(" SignerInfos: " + val);
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// FIXME read this more carefully.
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// Since we are just reading a file (probably) we just read until we
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// reach the end.
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while (true)
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{
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int i = ber.peek();
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if (i == 0 || i == -1)
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break;
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signerInfos.add(new SignerInfo(ber));
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}
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}
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public BigInteger getVersion()
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{
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return version;
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}
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public Certificate[] getCertificates()
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{
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return (certificates != null ? (Certificate[]) certificates.clone()
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: null);
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}
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public OID getContentType()
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{
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return contentType;
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}
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public byte[] getContent()
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{
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return (content != null ? (byte[]) content.clone() : null);
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}
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public Set getDigestAlgorithms()
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{
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// FIXME copy contents too, they are mutable!!!
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return Collections.unmodifiableSet(digestAlgorithms);
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}
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public Set getSignerInfos()
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{
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Set copy = new HashSet();
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for (Iterator it = signerInfos.iterator(); it.hasNext(); )
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copy.add(it.next());
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return Collections.unmodifiableSet(copy);
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}
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}
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