| /* PKCS7SignedData.java -- reader for PKCS#7 signedData objects |
| Copyright (C) 2004, 2005 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| package gnu.java.security.pkcs; |
| |
| import gnu.java.security.OID; |
| import gnu.java.security.ber.BER; |
| import gnu.java.security.ber.BEREncodingException; |
| import gnu.java.security.ber.BERReader; |
| import gnu.java.security.ber.BERValue; |
| import gnu.java.security.der.DERValue; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import java.math.BigInteger; |
| |
| import java.security.cert.CRL; |
| import java.security.cert.CRLException; |
| import java.security.cert.Certificate; |
| import java.security.cert.CertificateException; |
| import java.security.cert.CertificateFactory; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Set; |
| |
| /** |
| * The SignedData object in PKCS #7. This is a read-only implementation of |
| * this format, and is used to provide signed Jar file support. |
| * |
| * @author Casey Marshall (csm@gnu.org) |
| */ |
| public class PKCS7SignedData |
| { |
| |
| public static final OID PKCS7_DATA = new OID("1.2.840.113549.1.7.1"); |
| public static final OID PKCS7_SIGNED_DATA = new OID("1.2.840.113549.1.7.2"); |
| |
| private BigInteger version; |
| private Set digestAlgorithms; |
| private OID contentType; |
| private byte[] content; |
| private Certificate[] certificates; |
| private CRL[] crls; |
| private Set signerInfos; |
| |
| private static final boolean DEBUG = false; |
| private static void debug(String msg) |
| { |
| System.err.print("PKCS7SignedData >> "); |
| System.err.println(msg); |
| } |
| |
| public PKCS7SignedData(InputStream in) |
| throws CRLException, CertificateException, IOException |
| { |
| this(new BERReader(in)); |
| } |
| |
| /** |
| * Parse an encoded PKCS#7 SignedData object. The ASN.1 format of this |
| * object is: |
| * |
| * <pre> |
| * SignedData ::= SEQUENCE { |
| * version Version, |
| * digestAlgorithms DigestAlgorithmIdentifiers, |
| * contentInfo ContentInfo, |
| * certificates |
| * [0] IMPLICIT ExtendedCertificatesAndCertificates OPTIONAL, |
| * crls |
| * [1] IMPLICIT CertificateRevocationLists OPTIONAL, |
| * signerInfos SignerInfos } |
| * |
| * Version ::= INTEGER |
| * |
| * DigestAlgorithmIdentifiers ::= SET OF DigestAlgorithmIdentifier |
| * |
| * DigestAlgorithmIdentifier ::= AlgorithmIdentifier |
| * |
| * ContentInfo ::= SEQUENCE { |
| * contentType ContentType, |
| * content [0] EXPLICIT ANY DEFINED BY contentType OPTIONAL } |
| * |
| * ContentType ::= OBJECT IDENTIFIER |
| * |
| * ExtendedCertificatesAndCertificates ::= |
| * SET OF ExtendedCertificatesAndCertificate |
| * |
| * ExtendedCertificatesAndCertificate ::= CHOICE { |
| * certificate Certificate, -- from X.509 |
| * extendedCertificate [0] IMPLICIT ExtendedCertificate } |
| * |
| * CertificateRevocationLists ::= SET OF CertificateRevocationList |
| * -- from X.509 |
| * |
| * SignerInfos ::= SET OF SignerInfo |
| * |
| * SignerInfo ::= SEQUENCE { |
| * version Version, |
| * issuerAndSerialNumber IssuerAndSerialNumber, |
| * digestAlgorithm DigestAlgorithmIdentifier, |
| * authenticatedAttributes |
| * [0] IMPLICIT Attributes OPTIONAL, |
| * digestEncryptionAlgorithm DigestEncryptionAlgorithmIdentifier, |
| * encryptedDigest EncryptedDigest, |
| * unauthenticatedAttributes |
| * [1] IMPLICIT Attributes OPTIONAL } |
| * |
| * EncryptedDigest ::= OCTET STRING |
| * </pre> |
| * |
| * <p>(Readers who are confused as to why it takes 40 levels of indirection |
| * to specify "data with a signature", rest assured that the present author |
| * is as confused as you are).</p> |
| */ |
| public PKCS7SignedData(BERReader ber) |
| throws CRLException, CertificateException, IOException |
| { |
| CertificateFactory x509 = CertificateFactory.getInstance("X509"); |
| DERValue val = ber.read(); |
| if (!val.isConstructed()) |
| throw new BEREncodingException("malformed ContentInfo"); |
| |
| val = ber.read(); |
| if (val.getTag() != BER.OBJECT_IDENTIFIER) |
| throw new BEREncodingException("malformed ContentType"); |
| |
| if (!PKCS7_SIGNED_DATA.equals(val.getValue())) |
| throw new BEREncodingException("content is not SignedData"); |
| |
| val = ber.read(); |
| if (val.getTag() != 0) |
| throw new BEREncodingException("malformed Content"); |
| |
| val = ber.read(); |
| if (!val.isConstructed()) |
| throw new BEREncodingException("malformed SignedData"); |
| |
| if (DEBUG) |
| debug("SignedData: " + val); |
| |
| val = ber.read(); |
| if (val.getTag() != BER.INTEGER) |
| throw new BEREncodingException("expecting Version"); |
| version = (BigInteger) val.getValue(); |
| |
| if (DEBUG) |
| debug(" Version: " + version); |
| |
| digestAlgorithms = new HashSet(); |
| val = ber.read(); |
| if (!val.isConstructed()) |
| throw new BEREncodingException("malformed DigestAlgorithmIdentifiers"); |
| if (DEBUG) |
| debug(" DigestAlgorithmIdentifiers: " + val); |
| int count = 0; |
| DERValue val2 = ber.read(); |
| while (val2 != BER.END_OF_SEQUENCE && |
| (val.getLength() > 0 && val.getLength() > count)) |
| { |
| if (!val2.isConstructed()) |
| throw new BEREncodingException("malformed AlgorithmIdentifier"); |
| if (DEBUG) |
| debug(" AlgorithmIdentifier: " + val2); |
| count += val2.getEncodedLength(); |
| val2 = ber.read(); |
| if (val2.getTag() != BER.OBJECT_IDENTIFIER) |
| throw new BEREncodingException("malformed AlgorithmIdentifier"); |
| if (DEBUG) |
| debug(" ID: " + val2.getValue()); |
| List algId = new ArrayList(2); |
| algId.add(val2.getValue()); |
| val2 = ber.read(); |
| if (val2 != BER.END_OF_SEQUENCE) |
| { |
| count += val2.getEncodedLength(); |
| if (val2.getTag() == BER.NULL) |
| algId.add(null); |
| else |
| algId.add(val2.getEncoded()); |
| if (DEBUG) |
| debug(" params: " + new BigInteger(1, val2.getEncoded()).toString(16)); |
| if (val2.isConstructed()) |
| ber.skip(val2.getLength()); |
| if (BERValue.isIndefinite(val)) |
| val2 = ber.read(); |
| } |
| else |
| algId.add(null); |
| digestAlgorithms.add(algId); |
| } |
| |
| val = ber.read(); |
| if (!val.isConstructed()) |
| throw new BEREncodingException("malformed ContentInfo"); |
| if (DEBUG) |
| debug(" ContentInfo: " + val); |
| val2 = ber.read(); |
| if (val2.getTag() != BER.OBJECT_IDENTIFIER) |
| throw new BEREncodingException("malformed ContentType"); |
| contentType = (OID) val2.getValue(); |
| if (DEBUG) |
| debug(" ContentType: " + contentType); |
| if (BERValue.isIndefinite(val) |
| || (val.getLength() > 0 && val.getLength() > val2.getEncodedLength())) |
| { |
| val2 = ber.read(); |
| if (val2 != BER.END_OF_SEQUENCE) |
| { |
| content = val2.getEncoded(); |
| if (BERValue.isIndefinite(val)) |
| val2 = ber.read(); |
| if (DEBUG) |
| debug(" Content: " + new BigInteger(1, content).toString(16)); |
| } |
| } |
| |
| val = ber.read(); |
| if (val.getTag() == 0) |
| { |
| if (!val.isConstructed()) |
| throw new BEREncodingException("malformed ExtendedCertificatesAndCertificates"); |
| if (DEBUG) |
| debug(" ExtendedCertificatesAndCertificates: " + val); |
| count = 0; |
| val2 = ber.read(); |
| List certs = new LinkedList(); |
| while (val2 != BER.END_OF_SEQUENCE && |
| (val.getLength() > 0 && val.getLength() > count)) |
| { |
| Certificate cert = |
| x509.generateCertificate(new ByteArrayInputStream(val2.getEncoded())); |
| if (DEBUG) |
| debug(" Certificate: " + cert); |
| certs.add(cert); |
| count += val2.getEncodedLength(); |
| ber.skip(val2.getLength()); |
| if (BERValue.isIndefinite(val) || val.getLength() > count) |
| val2 = ber.read(); |
| } |
| certificates = (Certificate[]) certs.toArray(new Certificate[certs.size()]); |
| val = ber.read(); |
| } |
| |
| if (val.getTag() == 1) |
| { |
| if (!val.isConstructed()) |
| throw new BEREncodingException("malformed CertificateRevocationLists"); |
| if (DEBUG) |
| debug(" CertificateRevocationLists: " + val); |
| count = 0; |
| val2 = ber.read(); |
| List crls = new LinkedList(); |
| while (val2 != BER.END_OF_SEQUENCE && |
| (val.getLength() > 0 && val.getLength() > count)) |
| { |
| CRL crl = x509.generateCRL(new ByteArrayInputStream(val2.getEncoded())); |
| if (DEBUG) |
| debug (" CRL: " + crl); |
| crls.add(crl); |
| count += val2.getEncodedLength(); |
| ber.skip(val2.getLength()); |
| if (BERValue.isIndefinite(val) || val.getLength() > count) |
| val2 = ber.read(); |
| } |
| this.crls = (CRL[]) crls.toArray(new CRL[crls.size()]); |
| val = ber.read(); |
| } |
| |
| signerInfos = new HashSet(); |
| if (!val.isConstructed()) |
| throw new BEREncodingException("malformed SignerInfos"); |
| |
| if (DEBUG) |
| debug(" SignerInfos: " + val); |
| |
| // FIXME read this more carefully. |
| // Since we are just reading a file (probably) we just read until we |
| // reach the end. |
| while (true) |
| { |
| int i = ber.peek(); |
| if (i == 0 || i == -1) |
| break; |
| signerInfos.add(new SignerInfo(ber)); |
| } |
| } |
| |
| public BigInteger getVersion() |
| { |
| return version; |
| } |
| |
| public Certificate[] getCertificates() |
| { |
| return (certificates != null ? (Certificate[]) certificates.clone() |
| : null); |
| } |
| |
| public OID getContentType() |
| { |
| return contentType; |
| } |
| |
| public byte[] getContent() |
| { |
| return (content != null ? (byte[]) content.clone() : null); |
| } |
| |
| public Set getDigestAlgorithms() |
| { |
| // FIXME copy contents too, they are mutable!!! |
| return Collections.unmodifiableSet(digestAlgorithms); |
| } |
| |
| public Set getSignerInfos() |
| { |
| Set copy = new HashSet(); |
| for (Iterator it = signerInfos.iterator(); it.hasNext(); ) |
| copy.add(it.next()); |
| return Collections.unmodifiableSet(copy); |
| } |
| } |
