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workaround for https://bugzilla.redhat.com/show_bug.cgi?id=1155012

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git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1636769 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Andreas Beeker 2014-11-04 22:56:39 +00:00
parent 4923afc9f8
commit bb378b0719
1 changed files with 28 additions and 0 deletions
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28
src/ooxml/java/org/apache/poi/poifs/crypt/dsig/facets/SignatureFacet.java
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@ -24,7 +24,12 @@
package org.apache.poi.poifs.crypt.dsig.facets;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.security.GeneralSecurityException;
import java.security.MessageDigest;
import java.security.Provider;
import java.security.Security;
import java.util.List;
import javax.xml.XMLConstants;
@ -38,9 +43,13 @@ import javax.xml.crypto.dsig.XMLSignatureException;
import javax.xml.crypto.dsig.XMLSignatureFactory;
import javax.xml.crypto.dsig.spec.TransformParameterSpec;
import org.apache.jcp.xml.dsig.internal.dom.DOMDigestMethod;
import org.apache.jcp.xml.dsig.internal.dom.DOMReference;
import org.apache.poi.openxml4j.opc.PackageNamespaces;
import org.apache.poi.poifs.crypt.dsig.SignatureConfig;
import org.apache.poi.poifs.crypt.dsig.SignatureConfig.SignatureConfigurable;
import org.apache.poi.util.POILogFactory;
import org.apache.poi.util.POILogger;
import org.w3c.dom.Document;
/**
@ -48,6 +57,8 @@ import org.w3c.dom.Document;
*/
public abstract class SignatureFacet implements SignatureConfigurable {
private static final POILogger LOG = POILogFactory.getLogger(SignatureFacet.class);
public static final String XML_NS = XMLConstants.XMLNS_ATTRIBUTE_NS_URI;
public static final String XML_DIGSIG_NS = XMLSignature.XMLNS;
public static final String OO_DIGSIG_NS = PackageNamespaces.DIGITAL_SIGNATURE;
@ -139,6 +150,23 @@ public abstract class SignatureFacet implements SignatureConfigurable {
reference = sigFac.newReference(uri, digestMethod, transforms, type, id, digestValue);
}
// workaround for https://bugzilla.redhat.com/show_bug.cgi?id=1155012
// overwrite standard message digest, if a digest <> SHA1 is used
Provider bcProv = Security.getProvider("BC");
if (bcProv != null && !DigestMethod.SHA1.equals(digestMethodUri)) {
try {
Method m = DOMDigestMethod.class.getDeclaredMethod("getMessageDigestAlgorithm");
m.setAccessible(true);
String mdAlgo = (String)m.invoke(digestMethod);
MessageDigest md = MessageDigest.getInstance(mdAlgo, bcProv);
Field f = DOMReference.class.getDeclaredField("md");
f.setAccessible(true);
f.set(reference, md);
} catch (Exception e) {
LOG.log(POILogger.WARN, "Can't overwrite message digest (workaround for https://bugzilla.redhat.com/show_bug.cgi?id=1155012)", e);
}
}
return reference;
}
}