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authorAndreas Fitzek <andreas.fitzek@iaik.tugraz.at>2014-07-10 12:09:05 +0200
committerAndreas Fitzek <andreas.fitzek@iaik.tugraz.at>2014-07-10 12:09:05 +0200
commitaf90012c848711a4c9010dbcf71694dbfbca0e86 (patch)
treecd40f8fab90b6a2fe62359a404497d369d82ece0 /pdf-as-lib
parent83a573238984575b76ab06dca677831f4a650534 (diff)
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Integrity verification of Signature after Signature creation to ensure correct signed Document
Diffstat (limited to 'pdf-as-lib')
-rw-r--r--pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/api/sign/IPlainSigner.java3
-rw-r--r--pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/PdfAsImpl.java29
-rw-r--r--pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/signing/pdfbox/PADESPDFBOXSigner.java3
-rw-r--r--pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/signing/pdfbox/PdfboxSignerWrapper.java10
-rw-r--r--pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/util/SignatureUtils.java105
-rw-r--r--pdf-as-lib/src/main/java/at/gv/egiz/sl/util/ISignatureConnector.java3
-rw-r--r--pdf-as-lib/src/main/java/at/gv/egiz/sl/util/ISignatureConnectorSLWrapper.java68
-rw-r--r--pdf-as-lib/src/main/java/at/gv/egiz/sl/util/MOAConnector.java19
8 files changed, 159 insertions, 81 deletions
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/api/sign/IPlainSigner.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/api/sign/IPlainSigner.java
index 903b9630..a167c596 100644
--- a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/api/sign/IPlainSigner.java
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/api/sign/IPlainSigner.java
@@ -25,6 +25,7 @@ package at.gv.egiz.pdfas.lib.api.sign;
import iaik.x509.X509Certificate;
import at.gv.egiz.pdfas.common.exceptions.PdfAsException;
+import at.gv.egiz.pdfas.lib.impl.status.RequestedSignature;
/**
* Signer interface
@@ -48,7 +49,7 @@ public interface IPlainSigner {
* @return
* @throws PdfAsException
*/
- public byte[] sign(byte[] input, int[] byteRange, SignParameter parameter) throws PdfAsException;
+ public byte[] sign(byte[] input, int[] byteRange, SignParameter parameter, RequestedSignature requestedSignature) throws PdfAsException;
/**
* Gets the PDF Subfilter for this signer
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/PdfAsImpl.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/PdfAsImpl.java
index 28bd9151..7dcdca2b 100644
--- a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/PdfAsImpl.java
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/PdfAsImpl.java
@@ -31,15 +31,12 @@ import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
-import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
-import javax.imageio.ImageIO;
-
import org.apache.pdfbox.cos.COSArray;
import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSDictionary;
@@ -47,14 +44,13 @@ import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.cos.COSString;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
-import org.apache.pdfbox.pdmodel.PDPageable;
-import org.apache.pdfbox.util.PDFImageWriter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import at.gv.egiz.pdfas.common.exceptions.PDFIOException;
import at.gv.egiz.pdfas.common.exceptions.PdfAsException;
import at.gv.egiz.pdfas.common.exceptions.PdfAsSettingsException;
+import at.gv.egiz.pdfas.common.exceptions.PdfAsSignatureException;
import at.gv.egiz.pdfas.common.exceptions.PdfAsValidationException;
import at.gv.egiz.pdfas.common.settings.ISettings;
import at.gv.egiz.pdfas.common.settings.Settings;
@@ -87,6 +83,7 @@ import at.gv.egiz.pdfas.lib.impl.status.PDFObject;
import at.gv.egiz.pdfas.lib.impl.status.RequestedSignature;
import at.gv.egiz.pdfas.lib.impl.verify.IVerifyFilter;
import at.gv.egiz.pdfas.lib.impl.verify.VerifierDispatcher;
+import at.gv.egiz.pdfas.lib.util.SignatureUtils;
import at.knowcenter.wag.egov.egiz.pdf.PositioningInstruction;
import at.knowcenter.wag.egov.egiz.pdf.TablePos;
import at.knowcenter.wag.egov.egiz.table.Table;
@@ -193,18 +190,11 @@ public class PdfAsImpl implements PdfAs, IConfigurationConstants {
IPdfSigner signer = PdfSignerFactory.createPdfSigner();
signer.signPDF(status.getPdfObject(), requestedSignature,
new PdfboxSignerWrapper(status.getSignParamter()
- .getPlainSigner(), parameter));
+ .getPlainSigner(), parameter, requestedSignature));
// ================================================================
// Create SignResult
- SignResultImpl result = new SignResultImpl(status.getSignParamter()
- .getOutput());
- OutputStream outputStream = result.getOutputDocument()
- .createOutputStream();
-
- outputStream.write(status.getPdfObject().getSignedDocument());
-
- outputStream.close();
+ SignResult result = createSignResult(status);
return result;
} catch (Throwable e) {
@@ -424,7 +414,16 @@ public class PdfAsImpl implements PdfAs, IConfigurationConstants {
String signature = new COSString(request.getSignature())
.getHexString();
byte[] pdfSignature = signature.getBytes();
-
+ //byte[] input = PDFUtils.blackOutSignature(status.getPdfObject().getSignedDocument(),
+ // request.getSignatureDataByteRange());
+ VerifyResult verifyResult = SignatureUtils.verifySignature(request.getSignature(), request.getSignatureData());
+ RequestedSignature requestedSignature = request.getStatus().getRequestedSignature();
+
+ if(!StreamUtils.dataCompare(requestedSignature.getCertificate().getFingerprintSHA(),
+ verifyResult.getSignerCertificate().getFingerprintSHA())) {
+ throw new PdfAsSignatureException("Certificates missmatch!");
+ }
+
for (int i = 0; i < pdfSignature.length; i++) {
status.getPdfObject().getSignedDocument()[offset + i] = pdfSignature[i];
}
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/signing/pdfbox/PADESPDFBOXSigner.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/signing/pdfbox/PADESPDFBOXSigner.java
index 4e82efa5..c8c4eeb4 100644
--- a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/signing/pdfbox/PADESPDFBOXSigner.java
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/signing/pdfbox/PADESPDFBOXSigner.java
@@ -35,7 +35,6 @@ import java.util.List;
import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSDictionary;
import org.apache.pdfbox.cos.COSName;
-import org.apache.pdfbox.cos.COSObject;
import org.apache.pdfbox.exceptions.COSVisitorException;
import org.apache.pdfbox.exceptions.SignatureException;
import org.apache.pdfbox.pdmodel.PDDocument;
@@ -343,7 +342,7 @@ public class PADESPDFBOXSigner implements IPdfSigner, IConfigurationConstants {
sigFieldName = "PDF-AS Signatur";
}
- int count = SignatureUtils.countSignatures(doc);
+ int count = SignatureUtils.countSignatures(doc, sigFieldName);
sigFieldName = sigFieldName + count;
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/signing/pdfbox/PdfboxSignerWrapper.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/signing/pdfbox/PdfboxSignerWrapper.java
index faa49148..44915a42 100644
--- a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/signing/pdfbox/PdfboxSignerWrapper.java
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/signing/pdfbox/PdfboxSignerWrapper.java
@@ -39,6 +39,7 @@ import at.gv.egiz.pdfas.common.utils.StreamUtils;
import at.gv.egiz.pdfas.lib.api.sign.IPlainSigner;
import at.gv.egiz.pdfas.lib.api.sign.SignParameter;
import at.gv.egiz.pdfas.lib.impl.signing.sig_interface.PDFASSignatureInterface;
+import at.gv.egiz.pdfas.lib.impl.status.RequestedSignature;
public class PdfboxSignerWrapper implements PDFASSignatureInterface {
@@ -46,16 +47,17 @@ public class PdfboxSignerWrapper implements PDFASSignatureInterface {
.getLogger(PdfboxSignerWrapper.class);
private IPlainSigner signer;
- @SuppressWarnings("unused")
- private PDSignature signature;
+ private PDSignature signature;
private int[] byteRange;
private Calendar date;
private SignParameter parameters;
+ private RequestedSignature requestedSignature;
- public PdfboxSignerWrapper(IPlainSigner signer, SignParameter parameters) {
+ public PdfboxSignerWrapper(IPlainSigner signer, SignParameter parameters, RequestedSignature requestedSignature) {
this.signer = signer;
this.date = Calendar.getInstance();
this.parameters = parameters;
+ this.requestedSignature = requestedSignature;
}
public byte[] sign(InputStream inputStream) throws SignatureException,
@@ -66,7 +68,7 @@ public class PdfboxSignerWrapper implements PDFASSignatureInterface {
logger.info("Byte Range 2: " + byteRange2);
try {
logger.info("Signing with Pdfbox Wrapper");
- byte[] signature = signer.sign(data, byteRange, this.parameters);
+ byte[] signature = signer.sign(data, byteRange, this.parameters, this.requestedSignature);
return signature;
} catch (PdfAsException e) {
throw new PdfAsWrappedIOException(e);
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/util/SignatureUtils.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/util/SignatureUtils.java
index 28713e1a..4527b92b 100644
--- a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/util/SignatureUtils.java
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/util/SignatureUtils.java
@@ -1,13 +1,31 @@
package at.gv.egiz.pdfas.lib.util;
+import iaik.cms.CMSException;
+import iaik.cms.SignedData;
+import iaik.cms.SignerInfo;
+import iaik.x509.X509Certificate;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.security.SignatureException;
+
import org.apache.pdfbox.cos.COSArray;
import org.apache.pdfbox.cos.COSDictionary;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.pdmodel.PDDocument;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import at.gv.egiz.pdfas.common.exceptions.PdfAsSignatureException;
+import at.gv.egiz.pdfas.lib.api.verify.VerifyResult;
+import at.gv.egiz.pdfas.lib.impl.verify.VerifyResultImpl;
public class SignatureUtils {
- public static int countSignatures(PDDocument doc) {
+ private static final Logger logger = LoggerFactory
+ .getLogger(SignatureUtils.class);
+
+ public static int countSignatures(PDDocument doc, String sigName) {
int count = 0;
COSDictionary trailer = doc.getDocument().getTrailer();
COSDictionary root = (COSDictionary) trailer
@@ -20,10 +38,93 @@ public class SignatureUtils {
COSDictionary field = (COSDictionary) fields.getObject(i);
String type = field.getNameAsString("FT");
if ("Sig".equals(type)) {
- count++;
+ String name = field.getString(COSName.T);
+ if (name != null) {
+ logger.debug("Found Sig: " + name);
+ try {
+ if (name.startsWith(sigName)) {
+ String numberString = name.replace(sigName, "");
+
+ logger.debug("Found Number: " + numberString);
+
+ int SigIDX = Integer.parseInt(numberString);
+ if(SigIDX > count) {
+ count = SigIDX;
+ }
+ }
+ } catch (Throwable e) {
+ logger.error("Failed to extract Signature Name!", e);
+ }
+ }
}
+
}
+
+ count++;
+
+ logger.debug("Returning sig number: " + count);
return count;
}
+
+
+ public static VerifyResult verifySignature(byte[] signature, byte[] input) throws PdfAsSignatureException {
+ //List<VerifyResult> results = new ArrayList<VerifyResult>();
+ try {
+ SignedData signedData = new SignedData(new ByteArrayInputStream(
+ signature));
+
+ signedData.setContent(input);
+
+ // get the signer infos
+ SignerInfo[] signerInfos = signedData.getSignerInfos();
+ if (signerInfos.length == 0) {
+ throw new PdfAsSignatureException("Invalid Signature (no signer info created!)", null);
+ }
+
+ if (signerInfos.length != 1) {
+ throw new PdfAsSignatureException("Invalid Signature (multiple signer infos found!)", null);
+ }
+ // verify the signatures
+ //for (int i = 0; i < signerInfos.length; i++) {
+ VerifyResultImpl verifyResult = new VerifyResultImpl();
+ //results.add(verifyResult);
+ try {
+ logger.info("Signature Algo: {}, Digest {}", signedData
+ .getSignerInfos()[0].getSignatureAlgorithm(),
+ signedData.getSignerInfos()[0].getDigestAlgorithm());
+ // verify the signature for SignerInfo at index i
+ X509Certificate signer_cert = signedData.verify(0);
+ // if the signature is OK the certificate of the
+ // signer is returned
+ logger.info("Signature OK from signer: "
+ + signer_cert.getSubjectDN());
+ verifyResult.setSignerCertificate(signer_cert);
+
+ } catch (SignatureException ex) {
+ // if the signature is not OK a SignatureException
+ // is thrown
+ logger.error(
+ "Signature ERROR from signer: "
+ + signedData.getCertificate(
+ signerInfos[0]
+ .getSignerIdentifier())
+ .getSubjectDN(), ex);
+
+ verifyResult.setSignerCertificate(signedData
+ .getCertificate(signerInfos[0]
+ .getSignerIdentifier()));
+ throw new PdfAsSignatureException("error.pdf.sig.08", ex);
+ }
+
+ return verifyResult;
+ //}
+ } catch (CMSException e) {
+ throw new PdfAsSignatureException("error.pdf.sig.08", e);
+ } catch (IOException e) {
+ throw new PdfAsSignatureException("error.pdf.sig.08", e);
+ }
+
+
+ }
}
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/ISignatureConnector.java b/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/ISignatureConnector.java
index fdb95f49..24a1b84d 100644
--- a/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/ISignatureConnector.java
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/ISignatureConnector.java
@@ -26,8 +26,9 @@ package at.gv.egiz.sl.util;
import iaik.x509.X509Certificate;
import at.gv.egiz.pdfas.common.exceptions.PdfAsException;
import at.gv.egiz.pdfas.lib.api.sign.SignParameter;
+import at.gv.egiz.pdfas.lib.impl.status.RequestedSignature;
public interface ISignatureConnector {
public X509Certificate getCertificate(SignParameter parameter) throws PdfAsException;
- public byte[] sign(byte[] input, int[] byteRange, SignParameter parameter) throws PdfAsException;
+ public byte[] sign(byte[] input, int[] byteRange, SignParameter parameter, RequestedSignature requestedSignature) throws PdfAsException;
}
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/ISignatureConnectorSLWrapper.java b/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/ISignatureConnectorSLWrapper.java
index b564c215..077f2f9b 100644
--- a/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/ISignatureConnectorSLWrapper.java
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/ISignatureConnectorSLWrapper.java
@@ -23,24 +23,23 @@
******************************************************************************/
package at.gv.egiz.sl.util;
-import iaik.cms.CMSException;
-import iaik.cms.SignedData;
-import iaik.cms.SignerInfo;
import iaik.x509.X509Certificate;
-import java.io.ByteArrayInputStream;
-import java.io.IOException;
-import java.security.SignatureException;
import java.security.cert.CertificateException;
import java.util.Iterator;
+import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import at.gv.egiz.pdfas.common.exceptions.PdfAsException;
import at.gv.egiz.pdfas.common.exceptions.PdfAsSignatureException;
+import at.gv.egiz.pdfas.common.utils.StreamUtils;
import at.gv.egiz.pdfas.lib.api.sign.SignParameter;
-import at.gv.egiz.pdfas.lib.impl.verify.VerifyResultImpl;
+import at.gv.egiz.pdfas.lib.api.verify.VerifyResult;
+import at.gv.egiz.pdfas.lib.impl.SignResultImpl;
+import at.gv.egiz.pdfas.lib.impl.status.RequestedSignature;
+import at.gv.egiz.pdfas.lib.util.SignatureUtils;
import at.gv.egiz.sl.schema.CreateCMSSignatureResponseType;
import at.gv.egiz.sl.schema.InfoboxAssocArrayPairType;
import at.gv.egiz.sl.schema.InfoboxReadRequestType;
@@ -84,59 +83,20 @@ public class ISignatureConnectorSLWrapper implements ISignatureConnector {
return certificate;
}
- public byte[] sign(byte[] input, int[] byteRange, SignParameter parameter) throws PdfAsException {
+ public byte[] sign(byte[] input, int[] byteRange,
+ SignParameter parameter, RequestedSignature requestedSignature) throws PdfAsException {
RequestPackage pack = connector.createCMSRequest(
input, byteRange, parameter);
CreateCMSSignatureResponseType response = connector
.sendCMSRequest(pack, parameter);
- try {
- SignedData signedData = new SignedData(new ByteArrayInputStream(
- response.getCMSSignature()));
-
- signedData.setContent(input);
-
- // get the signer infos
- SignerInfo[] signerInfos = signedData.getSignerInfos();
- if (signerInfos.length == 0) {
- throw new PdfAsSignatureException("Invalid Signature (no signer info created!)", null);
- }
- // verify the signatures
- for (int i = 0; i < signerInfos.length; i++) {
- VerifyResultImpl verifyResult = new VerifyResultImpl();
- try {
- logger.info("Signature Algo: {}, Digest {}", signedData
- .getSignerInfos()[i].getSignatureAlgorithm(),
- signedData.getSignerInfos()[i].getDigestAlgorithm());
- // verify the signature for SignerInfo at index i
- X509Certificate signer_cert = signedData.verify(i);
- // if the signature is OK the certificate of the
- // signer is returned
- logger.info("Signature OK from signer: "
- + signer_cert.getSubjectDN());
- verifyResult.setSignerCertificate(signer_cert);
+
+ VerifyResult verifyResult = SignatureUtils.verifySignature(response.getCMSSignature(), input);
- } catch (SignatureException ex) {
- // if the signature is not OK a SignatureException
- // is thrown
- logger.error(
- "Signature ERROR from signer: "
- + signedData.getCertificate(
- signerInfos[i]
- .getSignerIdentifier())
- .getSubjectDN(), ex);
-
- verifyResult.setSignerCertificate(signedData
- .getCertificate(signerInfos[i]
- .getSignerIdentifier()));
- throw new PdfAsSignatureException("error.pdf.sig.08", ex);
- }
- }
- } catch (CMSException e) {
- throw new PdfAsSignatureException("error.pdf.sig.08", e);
- } catch (IOException e) {
- throw new PdfAsSignatureException("error.pdf.sig.08", e);
+ if(!StreamUtils.dataCompare(requestedSignature.getCertificate().getFingerprintSHA(),
+ verifyResult.getSignerCertificate().getFingerprintSHA())) {
+ throw new PdfAsSignatureException("Certificates missmatch!");
}
-
+
return response.getCMSSignature();
}
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/MOAConnector.java b/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/MOAConnector.java
index 73de30cf..1059dba1 100644
--- a/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/MOAConnector.java
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/MOAConnector.java
@@ -55,10 +55,15 @@ import org.xml.sax.SAXException;
import at.gv.egiz.pdfas.common.exceptions.PdfAsException;
import at.gv.egiz.pdfas.common.exceptions.PdfAsMOAException;
+import at.gv.egiz.pdfas.common.exceptions.PdfAsSignatureException;
import at.gv.egiz.pdfas.common.exceptions.PdfAsWrappedIOException;
import at.gv.egiz.pdfas.common.settings.ISettings;
+import at.gv.egiz.pdfas.common.utils.StreamUtils;
import at.gv.egiz.pdfas.lib.api.Configuration;
import at.gv.egiz.pdfas.lib.api.sign.SignParameter;
+import at.gv.egiz.pdfas.lib.api.verify.VerifyResult;
+import at.gv.egiz.pdfas.lib.impl.status.RequestedSignature;
+import at.gv.egiz.pdfas.lib.util.SignatureUtils;
public class MOAConnector implements ISignatureConnector {
@@ -135,7 +140,8 @@ public class MOAConnector implements ISignatureConnector {
return builder.build();
}
- public byte[] sign(byte[] input, int[] byteRange, SignParameter parameter) throws PdfAsException {
+ public byte[] sign(byte[] input, int[] byteRange, SignParameter parameter
+ , RequestedSignature requestedSignature) throws PdfAsException {
CloseableHttpClient client = null;
try {
client = buildHttpClient();
@@ -220,7 +226,16 @@ public class MOAConnector implements ISignatureConnector {
if (cmsSignature != null) {
try {
- return base64.decode(cmsSignature);
+ byte[] cmsSignatureData = base64.decode(cmsSignature);
+
+ VerifyResult verifyResult = SignatureUtils.verifySignature(cmsSignatureData, input);
+
+ if(!StreamUtils.dataCompare(requestedSignature.getCertificate().getFingerprintSHA(),
+ verifyResult.getSignerCertificate().getFingerprintSHA())) {
+ throw new PdfAsSignatureException("Certificates missmatch!");
+ }
+
+ return cmsSignatureData;
} catch(Exception e) {
throw new PdfAsException("error.pdf.io.07", e);
}