/*
* Copyright 2004 by Paulo Soares.
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (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.mozilla.org/MPL/
*
* 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.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library 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 Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
package com.lowagie.text.pdf;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.security.InvalidKeyException;
import java.security.KeyStore;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.PrivateKey;
import java.security.Signature;
import java.security.SignatureException;
import java.security.cert.CRL;
import java.security.cert.Certificate;
import java.security.cert.X509CRL;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Collection;
import java.util.Enumeration;
import java.util.GregorianCalendar;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1InputStream;
import org.bouncycastle.asn1.ASN1OutputStream;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1Set;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERInteger;
import org.bouncycastle.asn1.DERNull;
import org.bouncycastle.asn1.DERObject;
import org.bouncycastle.asn1.DERObjectIdentifier;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERSet;
import org.bouncycastle.asn1.DERString;
import org.bouncycastle.asn1.DERTaggedObject;
import org.bouncycastle.asn1.DERUTCTime;
import org.bouncycastle.jce.provider.X509CRLParser;
import org.bouncycastle.jce.provider.X509CertParser;
import com.lowagie.text.ExceptionConverter;
/**
* This class does all the processing related to signing and verifying a PKCS#7
* signature.
* <p>
* It's based in code found at org.bouncycastle.
*/
public class PdfPKCS7 {
private byte sigAttr[];
private byte digestAttr[];
private int version, signerversion;
private Set digestalgos;
private Collection certs, crls;
private X509Certificate signCert;
private byte[] digest;
private MessageDigest messageDigest;
private String digestAlgorithm, digestEncryptionAlgorithm;
private Signature sig;
private transient PrivateKey privKey;
private byte RSAdata[];
private boolean verified;
private boolean verifyResult;
private byte externalDigest[];
private byte externalRSAdata[];
private static final String ID_PKCS7_DATA = "1.2.840.113549.1.7.1";
private static final String ID_PKCS7_SIGNED_DATA = "1.2.840.113549.1.7.2";
private static final String ID_MD5 = "1.2.840.113549.2.5";
private static final String ID_MD2 = "1.2.840.113549.2.2";
private static final String ID_SHA1 = "1.3.14.3.2.26";
private static final String ID_RSA = "1.2.840.113549.1.1.1";
private static final String ID_DSA = "1.2.840.10040.4.1";
private static final String ID_CONTENT_TYPE = "1.2.840.113549.1.9.3";
private static final String ID_MESSAGE_DIGEST = "1.2.840.113549.1.9.4";
private static final String ID_SIGNING_TIME = "1.2.840.113549.1.9.5";
private static final String ID_MD2RSA = "1.2.840.113549.1.1.2";
private static final String ID_MD5RSA = "1.2.840.113549.1.1.4";
private static final String ID_SHA1RSA = "1.2.840.113549.1.1.5";
private static final String ID_ADBE_REVOCATION = "1.2.840.113583.1.1.8";
/**
* Holds value of property reason.
*/
private String reason;
/**
* Holds value of property location.
*/
private String location;
/**
* Holds value of property signDate.
*/
private Calendar signDate;
/**
* Holds value of property signName.
*/
private String signName;
/**
* Verifies a signature using the sub-filter adbe.x509.rsa_sha1.
* @param contentsKey the /Contents key
* @param certsKey the /Cert key
* @param provider the provider or <code>null</code> for the default provider
*/
public PdfPKCS7(byte[] contentsKey, byte[] certsKey, String provider) {
try {
X509CertParser cr = new X509CertParser();
cr.engineInit(new ByteArrayInputStream(certsKey));
certs = cr.engineReadAll();
signCert = (X509Certificate)certs.iterator().next();
crls = new ArrayList();
ASN1InputStream in = new ASN1InputStream(new ByteArrayInputStream(contentsKey));
digest = ((DEROctetString)in.readObject()).getOctets();
if (provider == null)
sig = Signature.getInstance("SHA1withRSA");
else
sig = Signature.getInstance("SHA1withRSA", provider);
sig.initVerify(signCert.getPublicKey());
}
catch (Exception e) {
throw new ExceptionConverter(e);
}
}
/**
* Verifies a signature using the sub-filter adbe.pkcs7.detached or
* adbe.pkcs7.sha1.
* @param contentsKey the /Contents key
* @param provider the provider or <code>null</code> for the default provider
*/
public PdfPKCS7(byte[] contentsKey, String provider) {
try {
ASN1InputStream din = new ASN1InputStream(new ByteArrayInputStream(contentsKey));
//
// Basic checks to make sure it's a PKCS#7 SignedData Object
//
DERObject pkcs;
try {
pkcs = din.readObject();
}
catch (IOException e) {
throw new IllegalArgumentException("can't decode PKCS7SignedData object");
}
if (!(pkcs instanceof ASN1Sequence)) {
throw new IllegalArgumentException("Not a valid PKCS#7 object - not a sequence");
}
ASN1Sequence signedData = (ASN1Sequence)pkcs;
DERObjectIdentifier objId = (DERObjectIdentifier)signedData.getObjectAt(0);
if (!objId.getId().equals(ID_PKCS7_SIGNED_DATA))
throw new IllegalArgumentException("Not a valid PKCS#7 object - not signed data");
ASN1Sequence content = (ASN1Sequence)((DERTaggedObject)signedData.getObjectAt(1)).getObject();
// the positions that we care are:
// 0 - version
// 1 - digestAlgorithms
// 2 - possible ID_PKCS7_DATA
// (the certificates and crls are taken out by other means)
// last - signerInfos
// the version
version = ((DERInteger)content.getObjectAt(0)).getValue().intValue();
// the digestAlgorithms
digestalgos = new HashSet();
Enumeration e = ((ASN1Set)content.getObjectAt(1)).getObjects();
while (e.hasMoreElements())
{
ASN1Sequence s = (ASN1Sequence)e.nextElement();
DERObjectIdentifier o = (DERObjectIdentifier)s.getObjectAt(0);
digestalgos.add(o.getId());
}
// the certificates and crls
X509CertParser cr = new X509CertParser();
cr.engineInit(new ByteArrayInputStream(contentsKey));
certs = cr.engineReadAll();
X509CRLParser cl = new X509CRLParser();
cl.engineInit(new ByteArrayInputStream(contentsKey));
crls = cl.engineReadAll();
// the possible ID_PKCS7_DATA
ASN1Sequence rsaData = (ASN1Sequence)content.getObjectAt(2);
if (rsaData.size() > 1) {
DEROctetString rsaDataContent = (DEROctetString)((DERTaggedObject)rsaData.getObjectAt(1)).getObject();
RSAdata = rsaDataContent.getOctets();
}
// the signerInfos
int next = 3;
while (content.getObjectAt(next) instanceof DERTaggedObject)
++next;
ASN1Set signerInfos = (ASN1Set)content.getObjectAt(next);
if (signerInfos.size() != 1)
throw new IllegalArgumentException("This PKCS#7 object has multiple SignerInfos - only one is supported at this time");
ASN1Sequence signerInfo = (ASN1Sequence)signerInfos.getObjectAt(0);
// the positions that we care are
// 0 - version
// 1 - the signing certificate serial number
// 2 - the digest algorithm
// 3 or 4 - digestEncryptionAlgorithm
// 4 or 5 - encryptedDigest
signerversion = ((DERInteger)signerInfo.getObjectAt(0)).getValue().intValue();
// Get the signing certificate
ASN1Sequence issuerAndSerialNumber = (ASN1Sequence)signerInfo.getObjectAt(1);
BigInteger serialNumber = ((DERInteger)issuerAndSerialNumber.getObjectAt(1)).getValue();
for (Iterator i = certs.iterator(); i.hasNext();) {
X509Certificate cert = (X509Certificate)i.next();
if (serialNumber.equals(cert.getSerialNumber())) {
signCert = cert;
break;
}
}
if (signCert == null) {
throw new IllegalArgumentException("Can't find signing certificate with serial " + serialNumber.toString(16));
}
digestAlgorithm = ((DERObjectIdentifier)((ASN1Sequence)signerInfo.getObjectAt(2)).getObjectAt(0)).getId();
next = 3;
if (signerInfo.getObjectAt(next) instanceof ASN1TaggedObject) {
ASN1TaggedObject tagsig = (ASN1TaggedObject)signerInfo.getObjectAt(next);
ASN1Sequence sseq = (ASN1Sequence)tagsig.getObject();
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
ASN1OutputStream dout = new ASN1OutputStream(bOut);
try {
ASN1EncodableVector attribute = new ASN1EncodableVector();
for (int k = 0; k < sseq.size(); ++k) {
attribute.add(sseq.getObjectAt(k));
}
dout.writeObject(new DERSet(attribute));
dout.close();
}
catch (IOException ioe){}
sigAttr = bOut.toByteArray();
for (int k = 0; k < sseq.size(); ++k) {
ASN1Sequence seq2 = (ASN1Sequence)sseq.getObjectAt(k);
if (((DERObjectIdentifier)seq2.getObjectAt(0)).getId().equals(ID_MESSAGE_DIGEST)) {
ASN1Set set = (ASN1Set)seq2.getObjectAt(1);
digestAttr = ((DEROctetString)set.getObjectAt(0)).getOctets();
break;
}
}
if (digestAttr == null)
throw new IllegalArgumentException("Authenticated attribute is missing the digest.");
++next;
}
digestEncryptionAlgorithm = ((DERObjectIdentifier)((ASN1Sequence)signerInfo.getObjectAt(next++)).getObjectAt(0)).getId();
digest = ((DEROctetString)signerInfo.getObjectAt(next)).getOctets();
if (RSAdata != null || digestAttr != null) {
if (provider == null || provider.startsWith("SunPKCS11"))
messageDigest = MessageDigest.getInstance(getHashAlgorithm());
else
messageDigest = MessageDigest.getInstance(getHashAlgorithm(), provider);
}
if (provider == null)
sig = Signature.getInstance(getDigestAlgorithm());
else
sig = Signature.getInstance(getDigestAlgorithm(), provider);
sig.initVerify(signCert.getPublicKey());
}
catch (Exception e) {
throw new ExceptionConverter(e);
}
}
/**
* Generates a signature.
* @param privKey the private key
* @param certChain the certificate chain
* @param crlList the certificate revocation list
* @param hashAlgorithm the hash algorithm
* @param provider the provider or <code>null</code> for the default provider
* @param hasRSAdata <CODE>true</CODE> if the sub-filter is adbe.pkcs7.sha1
* @throws InvalidKeyException on error
* @throws NoSuchProviderException on error
* @throws NoSuchAlgorithmException on error
*/
public PdfPKCS7(PrivateKey privKey, Certificate[] certChain, CRL[] crlList,
String hashAlgorithm, String provider, boolean hasRSAdata)
throws InvalidKeyException, NoSuchProviderException,
NoSuchAlgorithmException
{
this.privKey = privKey;
if (hashAlgorithm.equals("MD5")) {
digestAlgorithm = ID_MD5;
}
else if (hashAlgorithm.equals("MD2")) {
digestAlgorithm = ID_MD2;
}
else if (hashAlgorithm.equals("SHA")) {
digestAlgorithm = ID_SHA1;
}
else if (hashAlgorithm.equals("SHA1")) {
digestAlgorithm = ID_SHA1;
}
else {
throw new NoSuchAlgorithmException("Unknown Hash Algorithm "+hashAlgorithm);
}
version = signerversion = 1;
certs = new ArrayList();
crls = new ArrayList();
digestalgos = new HashSet();
digestalgos.add(digestAlgorithm);
//
// Copy in the certificates and crls used to sign the private key.
//
signCert = (X509Certificate)certChain[0];
for (int i = 0;i < certChain.length;i++) {
certs.add(certChain[i]);
}
if (crlList != null) {
for (int i = 0;i < crlList.length;i++) {
crls.add(crlList[i]);
}
}
if (privKey != null) {
//
// Now we have private key, find out what the digestEncryptionAlgorithm is.
//
digestEncryptionAlgorithm = privKey.getAlgorithm();
if (digestEncryptionAlgorithm.equals("RSA")) {
digestEncryptionAlgorithm = ID_RSA;
}
else if (digestEncryptionAlgorithm.equals("DSA")) {
digestEncryptionAlgorithm = ID_DSA;
}
else {
throw new NoSuchAlgorithmException("Unknown Key Algorithm "+digestEncryptionAlgorithm);
}
}
if (hasRSAdata) {
RSAdata = new byte[0];
if (provider == null || provider.startsWith("SunPKCS11"))
messageDigest = MessageDigest.getInstance(getHashAlgorithm());
else
messageDigest = MessageDigest.getInstance(getHashAlgorithm(), provider);
}
if (privKey != null) {
if (provider == null)
sig = Signature.getInstance(getDigestAlgorithm());
else
sig = Signature.getInstance(getDigestAlgorithm(), provider);
sig.initSign(privKey);
}
}
/**
* Update the digest with the specified bytes. This method is used both for signing and verifying
* @param buf the data buffer
* @param off the offset in the data buffer
* @param len the data length
* @throws SignatureException on error
*/
public void update(byte[] buf, int off, int len) throws SignatureException {
if (RSAdata != null || digestAttr != null)
messageDigest.update(buf, off, len);
else
sig.update(buf, off, len);
}
/**
* Verify the digest.
* @throws SignatureException on error
* @return <CODE>true</CODE> if the signature checks out, <CODE>false</CODE> otherwise
*/
public boolean verify() throws SignatureException {
if (verified)
return verifyResult;
if (sigAttr != null) {
sig.update(sigAttr);
if (RSAdata != null) {
byte msd[] = messageDigest.digest();
messageDigest.update(msd);
}
verifyResult = (Arrays.equals(messageDigest.digest(), digestAttr) && sig.verify(digest));
}
else {
if (RSAdata != null)
sig.update(messageDigest.digest());
verifyResult = sig.verify(digest);
}
verified = true;
return verifyResult;
}
/**
* Get the X.509 certificates associated with this PKCS#7 object
* @return the X.509 certificates associated with this PKCS#7 object
*/
public Certificate[] getCertificates() {
return (X509Certificate[])certs.toArray(new X509Certificate[certs.size()]);
}
/**
* Get the X.509 certificate revocation lists associated with this PKCS#7 object
* @return the X.509 certificate revocation lists associated with this PKCS#7 object
*/
public Collection getCRLs() {
return crls;
}
/**
* Get the X.509 certificate actually used to sign the digest.
* @return the X.509 certificate actually used to sign the digest
*/
public X509Certificate getSigningCertificate() {
return signCert;
}
/**
* Get the version of the PKCS#7 object. Always 1
* @return the version of the PKCS#7 object. Always 1
*/
public int getVersion() {
return version;
}
/**
* Get the version of the PKCS#7 "SignerInfo" object. Always 1
* @return the version of the PKCS#7 "SignerInfo" object. Always 1
*/
public int getSigningInfoVersion() {
return signerversion;
}
/**
* Get the algorithm used to calculate the message digest
* @return the algorithm used to calculate the message digest
*/
public String getDigestAlgorithm() {
String dea = digestEncryptionAlgorithm;
if (digestEncryptionAlgorithm.equals(ID_RSA) || digestEncryptionAlgorithm.equals(ID_MD5RSA)
|| digestEncryptionAlgorithm.equals(ID_MD2RSA) || digestEncryptionAlgorithm.equals(ID_SHA1RSA)) {
dea = "RSA";
}
else if (digestEncryptionAlgorithm.equals(ID_DSA)) {
dea = "DSA";
}
return getHashAlgorithm() + "with" + dea;
}
/**
* Returns the algorithm.
* @return the digest algorithm
*/
public String getHashAlgorithm() {
String da = digestAlgorithm;
if (digestAlgorithm.equals(ID_MD5) || digestAlgorithm.equals(ID_MD5RSA)) {
da = "MD5";
}
else if (digestAlgorithm.equals(ID_MD2) || digestAlgorithm.equals(ID_MD2RSA)) {
da = "MD2";
}
else if (digestAlgorithm.equals(ID_SHA1) || digestAlgorithm.equals(ID_SHA1RSA)) {
da = "SHA1";
}
return da;
}
/**
* Loads the default root certificates at <java.home>/lib/security/cacerts
* with the default provider.
* @return a <CODE>KeyStore</CODE>
*/
public static KeyStore loadCacertsKeyStore() {
return loadCacertsKeyStore(null);
}
/**
* Loads the default root certificates at <java.home>/lib/security/cacerts.
* @param provider the provider or <code>null</code> for the default provider
* @return a <CODE>KeyStore</CODE>
*/
public static KeyStore loadCacertsKeyStore(String provider) {
File file = new File(System.getProperty("java.home"), "lib");
file = new File(file, "security");
file = new File(file, "cacerts");
FileInputStream fin = null;
try {
fin = new FileInputStream(file);
KeyStore k;
if (provider == null)
k = KeyStore.getInstance("JKS");
else
k = KeyStore.getInstance("JKS", provider);
k.load(fin, null);
return k;
}
catch (Exception e) {
throw new ExceptionConverter(e);
}
finally {
try{if (fin != null) {fin.close();}}catch(Exception ex){}
}
}
/**
* Verifies a single certificate.
* @param cert the certificate to verify
* @param crls the certificate revocation list or <CODE>null</CODE>
* @param calendar the date or <CODE>null</CODE> for the current date
* @return a <CODE>String</CODE> with the error description or <CODE>null</CODE>
* if no error
*/
public static String verifyCertificate(X509Certificate cert, Collection crls, Calendar calendar) {
if (calendar == null)
calendar = new GregorianCalendar();
if (cert.hasUnsupportedCriticalExtension())
return "Has unsupported critical extension";
try {
cert.checkValidity(calendar.getTime());
}
catch (Exception e) {
return e.getMessage();
}
if (crls != null) {
for (Iterator it = crls.iterator(); it.hasNext();) {
if (((CRL)it.next()).isRevoked(cert))
return "Certificate revoked";
}
}
return null;
}
/**
* Verifies a certificate chain against a KeyStore.
* @param certs the certificate chain
* @param keystore the <CODE>KeyStore</CODE>
* @param crls the certificate revocation list or <CODE>null</CODE>
* @param calendar the date or <CODE>null</CODE> for the current date
* @return <CODE>null</CODE> if the certificate chain could be validated or a
* <CODE>Object[]{cert,error}</CODE> where <CODE>cert</CODE> is the
* failed certificate and <CODE>error</CODE> is the error message
*/
public static Object[] verifyCertificates(Certificate certs[], KeyStore keystore, Collection crls, Calendar calendar) {
if (calendar == null)
calendar = new GregorianCalendar();
for (int k = 0; k < certs.length; ++k) {
X509Certificate cert = (X509Certificate)certs[k];
String err = verifyCertificate(cert, crls, calendar);
if (err != null)
return new Object[]{cert, err};
try {
for (Enumeration aliases = keystore.aliases(); aliases.hasMoreElements();) {
try {
String alias = (String)aliases.nextElement();
if (!keystore.isCertificateEntry(alias))
continue;
X509Certificate certStoreX509 = (X509Certificate)keystore.getCertificate(alias);
if (verifyCertificate(certStoreX509, crls, calendar) != null)
continue;
try {
cert.verify(certStoreX509.getPublicKey());
return null;
}
catch (Exception e) {
continue;
}
}
catch (Exception ex) {
}
}
}
catch (Exception e) {
}
int j;
for (j = 0; j < certs.length; ++j) {
if (j == k)
continue;
X509Certificate certNext = (X509Certificate)certs[j];
try {
cert.verify(certNext.getPublicKey());
break;
}
catch (Exception e) {
}
}
if (j == certs.length)
return new Object[]{cert, "Cannot be verified against the KeyStore or the certificate chain"};
}
return new Object[]{null, "Invalid state. Possible circular certificate chain"};
}
/**
* Get the "issuer" from the TBSCertificate bytes that are passed in
* @param enc a TBSCertificate in a byte array
* @return a DERObject
*/
private static DERObject getIssuer(byte[] enc) {
try {
ASN1InputStream in = new ASN1InputStream(new ByteArrayInputStream(enc));
ASN1Sequence seq = (ASN1Sequence)in.readObject();
return (DERObject)seq.getObjectAt(seq.getObjectAt(0) instanceof DERTaggedObject ? 3 : 2);
}
catch (IOException e) {
throw new ExceptionConverter(e);
}
}
/**
* Get the "subject" from the TBSCertificate bytes that are passed in
* @param enc A TBSCertificate in a byte array
* @return a DERObject
*/
private static DERObject getSubject(byte[] enc) {
try {
ASN1InputStream in = new ASN1InputStream(new ByteArrayInputStream(enc));
ASN1Sequence seq = (ASN1Sequence)in.readObject();
return (DERObject)seq.getObjectAt(seq.getObjectAt(0) instanceof DERTaggedObject ? 5 : 4);
}
catch (IOException e) {
throw new ExceptionConverter(e);
}
}
/**
* Get the issuer fields from an X509 Certificate
* @param cert an X509Certificate
* @return an X509Name
*/
public static X509Name getIssuerFields(X509Certificate cert) {
try {
return new X509Name((ASN1Sequence)getIssuer(cert.getTBSCertificate()));
}
catch (Exception e) {
throw new ExceptionConverter(e);
}
}
/**
* Get the subject fields from an X509 Certificate
* @param cert an X509Certificate
* @return an X509Name
*/
public static X509Name getSubjectFields(X509Certificate cert) {
try {
return new X509Name((ASN1Sequence)getSubject(cert.getTBSCertificate()));
}
catch (Exception e) {
throw new ExceptionConverter(e);
}
}
/**
* Gets the bytes for the PKCS#1 object.
* @return a byte array
*/
public byte[] getEncodedPKCS1() {
try {
if (externalDigest != null)
digest = externalDigest;
else
digest = sig.sign();
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
ASN1OutputStream dout = new ASN1OutputStream(bOut);
dout.writeObject(new DEROctetString(digest));
dout.close();
return bOut.toByteArray();
}
catch (Exception e) {
throw new ExceptionConverter(e);
}
}
/**
* Sets the digest/signature to an external calculated value.
* @param digest the digest. This is the actual signature
* @param RSAdata the extra data that goes into the data tag in PKCS#7
* @param digestEncryptionAlgorithm the encryption algorithm. It may must be <CODE>null</CODE> if the <CODE>digest</CODE>
* is also <CODE>null</CODE>. If the <CODE>digest</CODE> is not <CODE>null</CODE>
* then it may be "RSA" or "DSA"
*/
public void setExternalDigest(byte digest[], byte RSAdata[], String digestEncryptionAlgorithm) {
externalDigest = digest;
externalRSAdata = RSAdata;
if (digestEncryptionAlgorithm != null) {
if (digestEncryptionAlgorithm.equals("RSA")) {
this.digestEncryptionAlgorithm = ID_RSA;
}
else if (digestEncryptionAlgorithm.equals("DSA")) {
this.digestEncryptionAlgorithm = ID_DSA;
}
else
throw new ExceptionConverter(new NoSuchAlgorithmException("Unknown Key Algorithm "+digestEncryptionAlgorithm));
}
}
/**
* Gets the bytes for the PKCS7SignedData object.
* @return the bytes for the PKCS7SignedData object
*/
public byte[] getEncodedPKCS7() {
return getEncodedPKCS7(null, null);
}
/**
* Gets the bytes for the PKCS7SignedData object. Optionally the authenticatedAttributes
* in the signerInfo can also be set. If either of the parameters is <CODE>null</CODE>, none will be used.
* @param secondDigest the digest in the authenticatedAttributes
* @param signingTime the signing time in the authenticatedAttributes
* @return the bytes for the PKCS7SignedData object
*/
public byte[] getEncodedPKCS7(byte secondDigest[], Calendar signingTime) {
try {
if (externalDigest != null) {
digest = externalDigest;
if (RSAdata != null)
RSAdata = externalRSAdata;
}
else if (externalRSAdata != null && RSAdata != null) {
RSAdata = externalRSAdata;
sig.update(RSAdata);
digest = sig.sign();
}
else {
if (RSAdata != null) {
RSAdata = messageDigest.digest();
sig.update(RSAdata);
}
digest = sig.sign();
}
// Create the set of Hash algorithms
ASN1EncodableVector digestAlgorithms = new ASN1EncodableVector();
for(Iterator it = digestalgos.iterator(); it.hasNext();) {
ASN1EncodableVector algos = new ASN1EncodableVector();
algos.add(new DERObjectIdentifier((String)it.next()));
algos.add(DERNull.INSTANCE);
digestAlgorithms.add(new DERSequence(algos));
}
// Create the contentInfo.
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(new DERObjectIdentifier(ID_PKCS7_DATA));
if (RSAdata != null)
v.add(new DERTaggedObject(0, new DEROctetString(RSAdata)));
DERSequence contentinfo = new DERSequence(v);
// Get all the certificates
//
v = new ASN1EncodableVector();
for (Iterator i = certs.iterator(); i.hasNext();) {
ASN1InputStream tempstream = new ASN1InputStream(new ByteArrayInputStream(((X509Certificate)i.next()).getEncoded()));
v.add(tempstream.readObject());
}
DERSet dercertificates = new DERSet(v);
// Create signerinfo structure.
//
ASN1EncodableVector signerinfo = new ASN1EncodableVector();
// Add the signerInfo version
//
signerinfo.add(new DERInteger(signerversion));
v = new ASN1EncodableVector();
v.add(getIssuer(signCert.getTBSCertificate()));
v.add(new DERInteger(signCert.getSerialNumber()));
signerinfo.add(new DERSequence(v));
// Add the digestAlgorithm
v = new ASN1EncodableVector();
v.add(new DERObjectIdentifier(digestAlgorithm));
v.add(new DERNull());
signerinfo.add(new DERSequence(v));
// add the authenticated attribute if present
if (secondDigest != null && signingTime != null) {
ASN1EncodableVector attribute = new ASN1EncodableVector();
v = new ASN1EncodableVector();
v.add(new DERObjectIdentifier(ID_CONTENT_TYPE));
v.add(new DERSet(new DERObjectIdentifier(ID_PKCS7_DATA)));
attribute.add(new DERSequence(v));
v = new ASN1EncodableVector();
v.add(new DERObjectIdentifier(ID_SIGNING_TIME));
v.add(new DERSet(new DERUTCTime(signingTime.getTime())));
attribute.add(new DERSequence(v));
v = new ASN1EncodableVector();
v.add(new DERObjectIdentifier(ID_MESSAGE_DIGEST));
v.add(new DERSet(new DEROctetString(secondDigest)));
attribute.add(new DERSequence(v));
if (!crls.isEmpty()) {
v = new ASN1EncodableVector();
v.add(new DERObjectIdentifier(ID_ADBE_REVOCATION));
ASN1EncodableVector v2 = new ASN1EncodableVector();
for (Iterator i = crls.iterator();i.hasNext();) {
ASN1InputStream t = new ASN1InputStream(new ByteArrayInputStream(((X509CRL)i.next()).getEncoded()));
v2.add(t.readObject());
}
v.add(new DERSet(new DERSequence(new DERTaggedObject(true, 0, new DERSequence(v2)))));
attribute.add(new DERSequence(v));
}
signerinfo.add(new DERTaggedObject(false, 0, new DERSet(attribute)));
}
// Add the digestEncryptionAlgorithm
v = new ASN1EncodableVector();
v.add(new DERObjectIdentifier(digestEncryptionAlgorithm));
v.add(new DERNull());
signerinfo.add(new DERSequence(v));
// Add the digest
signerinfo.add(new DEROctetString(digest));
// Finally build the body out of all the components above
ASN1EncodableVector body = new ASN1EncodableVector();
body.add(new DERInteger(version));
body.add(new DERSet(digestAlgorithms));
body.add(contentinfo);
body.add(new DERTaggedObject(false, 0, dercertificates));
if (!crls.isEmpty()) {
v = new ASN1EncodableVector();
for (Iterator i = crls.iterator();i.hasNext();) {
ASN1InputStream t = new ASN1InputStream(new ByteArrayInputStream(((X509CRL)i.next()).getEncoded()));
v.add(t.readObject());
}
DERSet dercrls = new DERSet(v);
body.add(new DERTaggedObject(false, 1, dercrls));
}
// Only allow one signerInfo
body.add(new DERSet(new DERSequence(signerinfo)));
// Now we have the body, wrap it in it's PKCS7Signed shell
// and return it
//
ASN1EncodableVector whole = new ASN1EncodableVector();
whole.add(new DERObjectIdentifier(ID_PKCS7_SIGNED_DATA));
whole.add(new DERTaggedObject(0, new DERSequence(body)));
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
ASN1OutputStream dout = new ASN1OutputStream(bOut);
dout.writeObject(new DERSequence(whole));
dout.close();
return bOut.toByteArray();
}
catch (Exception e) {
throw new ExceptionConverter(e);
}
}
/**
* When using authenticatedAttributes the authentication process is different.
* The document digest is generated and put inside the attribute. The signing is done over the DER encoded
* authenticatedAttributes. This method provides that encoding and the parameters must be
* exactly the same as in {@link #getEncodedPKCS7(byte[],Calendar)}.
* <p>
* A simple example:
* <p>
* <pre>
* Calendar cal = Calendar.getInstance();
* PdfPKCS7 pk7 = new PdfPKCS7(key, chain, null, "SHA1", null, false);
* MessageDigest messageDigest = MessageDigest.getInstance("SHA1");
* byte buf[] = new byte[8192];
* int n;
* InputStream inp = sap.getRangeStream();
* while ((n = inp.read(buf)) > 0) {
* messageDigest.update(buf, 0, n);
* }
* byte hash[] = messageDigest.digest();
* byte sh[] = pk7.getAuthenticatedAttributeBytes(hash, cal);
* pk7.update(sh, 0, sh.length);
* byte sg[] = pk7.getEncodedPKCS7(hash, cal);
* </pre>
* @param secondDigest the content digest
* @param signingTime the signing time
* @return the byte array representation of the authenticatedAttributes ready to be signed
*/
public byte[] getAuthenticatedAttributeBytes(byte secondDigest[], Calendar signingTime) {
try {
ASN1EncodableVector attribute = new ASN1EncodableVector();
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(new DERObjectIdentifier(ID_CONTENT_TYPE));
v.add(new DERSet(new DERObjectIdentifier(ID_PKCS7_DATA)));
attribute.add(new DERSequence(v));
v = new ASN1EncodableVector();
v.add(new DERObjectIdentifier(ID_SIGNING_TIME));
v.add(new DERSet(new DERUTCTime(signingTime.getTime())));
attribute.add(new DERSequence(v));
v = new ASN1EncodableVector();
v.add(new DERObjectIdentifier(ID_MESSAGE_DIGEST));
v.add(new DERSet(new DEROctetString(secondDigest)));
attribute.add(new DERSequence(v));
if (!crls.isEmpty()) {
v = new ASN1EncodableVector();
v.add(new DERObjectIdentifier(ID_ADBE_REVOCATION));
ASN1EncodableVector v2 = new ASN1EncodableVector();
for (Iterator i = crls.iterator();i.hasNext();) {
ASN1InputStream t = new ASN1InputStream(new ByteArrayInputStream(((X509CRL)i.next()).getEncoded()));
v2.add(t.readObject());
}
v.add(new DERSet(new DERSequence(new DERTaggedObject(true, 0, new DERSequence(v2)))));
attribute.add(new DERSequence(v));
}
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
ASN1OutputStream dout = new ASN1OutputStream(bOut);
dout.writeObject(new DERSet(attribute));
dout.close();
return bOut.toByteArray();
}
catch (Exception e) {
throw new ExceptionConverter(e);
}
}
/**
* Getter for property reason.
* @return Value of property reason.
*/
public String getReason() {
return this.reason;
}
/**
* Setter for property reason.
* @param reason New value of property reason.
*/
public void setReason(String reason) {
this.reason = reason;
}
/**
* Getter for property location.
* @return Value of property location.
*/
public String getLocation() {
return this.location;
}
/**
* Setter for property location.
* @param location New value of property location.
*/
public void setLocation(String location) {
this.location = location;
}
/**
* Getter for property signDate.
* @return Value of property signDate.
*/
public Calendar getSignDate() {
return this.signDate;
}
/**
* Setter for property signDate.
* @param signDate New value of property signDate.
*/
public void setSignDate(Calendar signDate) {
this.signDate = signDate;
}
/**
* Getter for property sigName.
* @return Value of property sigName.
*/
public String getSignName() {
return this.signName;
}
/**
* Setter for property sigName.
* @param signName New value of property sigName.
*/
public void setSignName(String signName) {
this.signName = signName;
}
/**
* a class that holds an X509 name
*/
public static class X509Name {
/**
* country code - StringType(SIZE(2))
*/
public static final DERObjectIdentifier C = new DERObjectIdentifier("2.5.4.6");
/**
* organization - StringType(SIZE(1..64))
*/
public static final DERObjectIdentifier O = new DERObjectIdentifier("2.5.4.10");
/**
* organizational unit name - StringType(SIZE(1..64))
*/
public static final DERObjectIdentifier OU = new DERObjectIdentifier("2.5.4.11");
/**
* Title
*/
public static final DERObjectIdentifier T = new DERObjectIdentifier("2.5.4.12");
/**
* common name - StringType(SIZE(1..64))
*/
public static final DERObjectIdentifier CN = new DERObjectIdentifier("2.5.4.3");
/**
* device serial number name - StringType(SIZE(1..64))
*/
public static final DERObjectIdentifier SN = new DERObjectIdentifier("2.5.4.5");
/**
* locality name - StringType(SIZE(1..64))
*/
public static final DERObjectIdentifier L = new DERObjectIdentifier("2.5.4.7");
/**
* state, or province name - StringType(SIZE(1..64))
*/
public static final DERObjectIdentifier ST = new DERObjectIdentifier("2.5.4.8");
/** Naming attribute of type X520name */
public static final DERObjectIdentifier SURNAME = new DERObjectIdentifier("2.5.4.4");
/** Naming attribute of type X520name */
public static final DERObjectIdentifier GIVENNAME = new DERObjectIdentifier("2.5.4.42");
/** Naming attribute of type X520name */
public static final DERObjectIdentifier INITIALS = new DERObjectIdentifier("2.5.4.43");
/** Naming attribute of type X520name */
public static final DERObjectIdentifier GENERATION = new DERObjectIdentifier("2.5.4.44");
/** Naming attribute of type X520name */
public static final DERObjectIdentifier UNIQUE_IDENTIFIER = new DERObjectIdentifier("2.5.4.45");
/**
* Email address (RSA PKCS#9 extension) - IA5String.
* <p>Note: if you're trying to be ultra orthodox, don't use this! It shouldn't be in here.
*/
public static final DERObjectIdentifier EmailAddress = new DERObjectIdentifier("1.2.840.113549.1.9.1");
/**
* email address in Verisign certificates
*/
public static final DERObjectIdentifier E = EmailAddress;
/** object identifier */
public static final DERObjectIdentifier DC = new DERObjectIdentifier("0.9.2342.19200300.100.1.25");
/** LDAP User id. */
public static final DERObjectIdentifier UID = new DERObjectIdentifier("0.9.2342.19200300.100.1.1");
/** A HashMap with default symbols */
public static HashMap DefaultSymbols = new HashMap();
static {
DefaultSymbols.put(C, "C");
DefaultSymbols.put(O, "O");
DefaultSymbols.put(T, "T");
DefaultSymbols.put(OU, "OU");
DefaultSymbols.put(CN, "CN");
DefaultSymbols.put(L, "L");
DefaultSymbols.put(ST, "ST");
DefaultSymbols.put(SN, "SN");
DefaultSymbols.put(EmailAddress, "E");
DefaultSymbols.put(DC, "DC");
DefaultSymbols.put(UID, "UID");
DefaultSymbols.put(SURNAME, "SURNAME");
DefaultSymbols.put(GIVENNAME, "GIVENNAME");
DefaultSymbols.put(INITIALS, "INITIALS");
DefaultSymbols.put(GENERATION, "GENERATION");
}
/** A HashMap with values */
public HashMap values = new HashMap();
/**
* Constructs an X509 name
* @param seq an ASN1 Sequence
*/
public X509Name(ASN1Sequence seq) {
Enumeration e = seq.getObjects();
while (e.hasMoreElements()) {
ASN1Set set = (ASN1Set)e.nextElement();
for (int i = 0; i < set.size(); i++) {
ASN1Sequence s = (ASN1Sequence)set.getObjectAt(i);
String id = (String)DefaultSymbols.get(s.getObjectAt(0));
if (id == null)
continue;
ArrayList vs = (ArrayList)values.get(id);
if (vs == null) {
vs = new ArrayList();
values.put(id, vs);
}
vs.add(((DERString)s.getObjectAt(1)).getString());
}
}
}
/**
* Constructs an X509 name
* @param dirName a directory name
*/
public X509Name(String dirName) {
X509NameTokenizer nTok = new X509NameTokenizer(dirName);
while (nTok.hasMoreTokens()) {
String token = nTok.nextToken();
int index = token.indexOf('=');
if (index == -1) {
throw new IllegalArgumentException("badly formated directory string");
}
String id = token.substring(0, index).toUpperCase();
String value = token.substring(index + 1);
ArrayList vs = (ArrayList)values.get(id);
if (vs == null) {
vs = new ArrayList();
values.put(id, vs);
}
vs.add(value);
}
}
public String getField(String name) {
ArrayList vs = (ArrayList)values.get(name);
return vs == null ? null : (String)vs.get(0);
}
/**
* gets a field array from the values Hashmap
* @param name
* @return an ArrayList
*/
public ArrayList getFieldArray(String name) {
ArrayList vs = (ArrayList)values.get(name);
return vs == null ? null : vs;
}
/**
* getter for values
* @return a HashMap with the fields of the X509 name
*/
public HashMap getFields() {
return values;
}
/**
* @see java.lang.Object#toString()
*/
public String toString() {
return values.toString();
}
}
/**
* class for breaking up an X500 Name into it's component tokens, ala
* java.util.StringTokenizer. We need this class as some of the
* lightweight Java environment don't support classes like
* StringTokenizer.
*/
public static class X509NameTokenizer {
private String oid;
private int index;
private StringBuffer buf = new StringBuffer();
public X509NameTokenizer(
String oid) {
this.oid = oid;
this.index = -1;
}
public boolean hasMoreTokens() {
return (index != oid.length());
}
public String nextToken() {
if (index == oid.length()) {
return null;
}
int end = index + 1;
boolean quoted = false;
boolean escaped = false;
buf.setLength(0);
while (end != oid.length()) {
char c = oid.charAt(end);
if (c == '"') {
if (!escaped) {
quoted = !quoted;
}
else {
buf.append(c);
}
escaped = false;
}
else {
if (escaped || quoted) {
buf.append(c);
escaped = false;
}
else if (c == '\\') {
escaped = true;
}
else if (c == ',') {
break;
}
else {
buf.append(c);
}
}
end++;
}
index = end;
return buf.toString().trim();
}
}
}