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-rw-r--r--smccSTAL/src/main/java/at/gv/egiz/bku/smccstal/SignRequestHandler.java78
1 files changed, 60 insertions, 18 deletions
diff --git a/smccSTAL/src/main/java/at/gv/egiz/bku/smccstal/SignRequestHandler.java b/smccSTAL/src/main/java/at/gv/egiz/bku/smccstal/SignRequestHandler.java
index c67084ba..bb7856c3 100644
--- a/smccSTAL/src/main/java/at/gv/egiz/bku/smccstal/SignRequestHandler.java
+++ b/smccSTAL/src/main/java/at/gv/egiz/bku/smccstal/SignRequestHandler.java
@@ -24,9 +24,12 @@
package at.gv.egiz.bku.smccstal;
+import iaik.me.asn1.ASN1;
+
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
+import java.security.SignatureException;
import java.util.List;
import javax.xml.bind.JAXBContext;
@@ -53,6 +56,7 @@ import at.gv.egiz.stal.STALResponse;
import at.gv.egiz.stal.SignRequest;
import at.gv.egiz.stal.SignResponse;
import at.gv.egiz.stal.signedinfo.CanonicalizationMethodType;
+import at.gv.egiz.stal.signedinfo.DigestMethodType;
import at.gv.egiz.stal.signedinfo.ObjectFactory;
import at.gv.egiz.stal.signedinfo.ReferenceType;
import at.gv.egiz.stal.signedinfo.SignatureMethodType;
@@ -64,6 +68,7 @@ public class SignRequestHandler extends AbstractRequestHandler {
private final static String CMS_DEF_SIGNEDINFO_ID = "SignedInfo-1";
private final static String CMS_DEF_OBJECT_ID = "SignatureData-1";
+ private final static String OID_MESSAGEDIGEST = "1.2.840.113549.1.9.4";
private static JAXBContext jaxbContext;
@@ -82,7 +87,7 @@ public class SignRequestHandler extends AbstractRequestHandler {
this.secureViewer = secureViewer;
}
- private ErrorResponse errorResponse(int errorCode, String errorMessage, Exception e)
+ private static ErrorResponse errorResponse(int errorCode, String errorMessage, Exception e)
{
log.error(errorMessage, e);
ErrorResponse err = new ErrorResponse(errorCode);
@@ -90,32 +95,19 @@ public class SignRequestHandler extends AbstractRequestHandler {
return err;
}
- @SuppressWarnings("unchecked")
@Override
public STALResponse handleRequest(STALRequest request) throws InterruptedException {
if (request instanceof SignRequest) {
SignRequest signReq = (SignRequest) request;
- byte[] signedInfoData = signReq.getSignedInfo();
+ byte[] signedInfoData = signReq.getSignedInfo().getValue();
try {
SignedInfoType signedInfo;
- if (signReq.getSignedInfoIsCMSSignedAttributes()) {
- signedInfo = new SignedInfoType();
- CanonicalizationMethodType canonicalizationMethod =
- new CanonicalizationMethodType();
- canonicalizationMethod.setAlgorithm("");
- SignatureMethodType signatureMethod = new SignatureMethodType();
- signatureMethod.setAlgorithm(signReq.getSignatureMethod());
- signedInfo.setCanonicalizationMethod(canonicalizationMethod);
- signedInfo.setSignatureMethod(signatureMethod);
- signedInfo.setId(CMS_DEF_SIGNEDINFO_ID);
- List<ReferenceType> references = signedInfo.getReference();
- ReferenceType reference = new ReferenceType();
- reference.setId(HashDataInput.CMS_DEF_REFERENCE_ID);
- reference.setURI(CMS_DEF_OBJECT_ID);
- references.add(reference);
+ if (signReq.getSignedInfo().isIsCMSSignedAttributes()) {
+ signedInfo = createCMSSignedInfo(signReq);
} else {
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
InputStream is = new ByteArrayInputStream(signedInfoData);
+ @SuppressWarnings("unchecked")
JAXBElement<SignedInfoType> si =
(JAXBElement<SignedInfoType>) unmarshaller.unmarshal(is);
signedInfo = si.getValue();
@@ -160,12 +152,62 @@ public class SignRequestHandler extends AbstractRequestHandler {
return errorResponse(1000, "Cannot unmarshal signed info.", e);
} catch (IOException e) {
return errorResponse(4000, "Error while creating signature.", e);
+ } catch (SignatureException e) {
+ return errorResponse(4000, "Error while parsing CMS signature.", e);
}
} else {
return errorResponse(1000, "Got unexpected STAL request: " + request + ".", null);
}
}
+ private static SignedInfoType createCMSSignedInfo(SignRequest signReq) throws SignatureException {
+ SignedInfoType signedInfo = new SignedInfoType();
+ byte[] signedInfoData = signReq.getSignedInfo().getValue();
+
+ CanonicalizationMethodType canonicalizationMethod =
+ new CanonicalizationMethodType();
+ canonicalizationMethod.setAlgorithm("");
+ signedInfo.setCanonicalizationMethod(canonicalizationMethod);
+
+ SignatureMethodType signatureMethod = new SignatureMethodType();
+ signatureMethod.setAlgorithm(signReq.getSignatureMethod());
+ signedInfo.setSignatureMethod(signatureMethod);
+
+ signedInfo.setId(CMS_DEF_SIGNEDINFO_ID);
+
+ List<ReferenceType> references = signedInfo.getReference();
+ ReferenceType reference = new ReferenceType();
+ reference.setId(HashDataInput.CMS_DEF_REFERENCE_ID);
+ reference.setURI(CMS_DEF_OBJECT_ID);
+ DigestMethodType digestMethod = new DigestMethodType();
+ digestMethod.setAlgorithm("CMS:" + signReq.getSignatureMethod());
+ reference.setDigestMethod(digestMethod);
+ byte[] messageDigest = null;
+ try {
+ ASN1 signedAttributes = new ASN1(signedInfoData);
+ if (!signedAttributes.isConstructed())
+ throw new SignatureException("Error while parsing CMS signature");
+ for (int i = 0; i < signedAttributes.getSize(); ++i) {
+ ASN1 signedAttribute = signedAttributes.getElementAt(i);
+ if (!signedAttribute.isConstructed())
+ throw new SignatureException("Error while parsing CMS signature");
+ ASN1 oid = signedAttribute.getElementAt(0);
+ if (oid.gvObjectId().equals(OID_MESSAGEDIGEST)) {
+ ASN1 value = signedAttribute.getElementAt(1);
+ if (!value.isConstructed())
+ throw new SignatureException("Error while parsing CMS signature");
+ messageDigest = value.getElementAt(0).gvByteArray();
+ break;
+ }
+ }
+ } catch (IOException e) {
+ throw new SignatureException(e);
+ }
+ reference.setDigestValue(messageDigest);
+ references.add(reference);
+ return signedInfo;
+ }
+
@Override
public boolean requireCard() {
return true;