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Diffstat (limited to 'libjava/classpath/gnu/java/security/pkcs/PKCS7SignedData.java')
| -rw-r--r-- | libjava/classpath/gnu/java/security/pkcs/PKCS7SignedData.java | 364 |
1 files changed, 364 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/security/pkcs/PKCS7SignedData.java b/libjava/classpath/gnu/java/security/pkcs/PKCS7SignedData.java new file mode 100644 index 00000000000..ba5efc7222f --- /dev/null +++ b/libjava/classpath/gnu/java/security/pkcs/PKCS7SignedData.java @@ -0,0 +1,364 @@ +/* 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); + } +} |