diff options
Diffstat (limited to 'smccSTAL/src/main/java/at')
| -rw-r--r-- | smccSTAL/src/main/java/at/gv/egiz/bku/smccstal/SignRequestHandler.java | 78 |
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; |