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Struts & Hibernate
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| | | Subject: How to verify PKCS#7 signature and timestamp present in PDF | Subject: How to verify PKCS#7 signature and timestamp present in PDF 2007-10-08 - By Gurpreet Singh
Back
Hi,
I have certified the PDF and embedded the digital signature with timestamp
using iText and Bouncy Castle API's. Can anybody tells me that how to verify
the PKCS#7 digital signature, certificate chain and timestamp present in the
PDF?
I am using the same code present at the following URL:
http://itextpdf.sourceforge.net/howtosign.html#howtoverify
I have used the example given at the following location to create the
PKCS#7signature and timstamp using Bouncy Castle API:
http://www.nabble.com/PDF-Digital-signature-with-timestamp---using-Time-Stamp
-Authority---example-t4147508.html
I am using external HSM device to read the keystore and keys stored on it.
But while verifying the signature, it is failing at the following line:
java.security.SignatureException: Verification failed
at com..crypto.<devieName>CertificateX509.verify(<HSMdeviceName>
CertificateX509.java:461)
at com..crypto.<deviceName>CertificateX509.verify(<HSMDeviceName>
CertificateX509.java:396)
at pdf.certify.timestamp.PdfPKCS7.verifyCertificates(PdfPKCS7.java
:648)
at MySigner.verify(MySigner.java:495)
at MySigner.signPDF(MySigner.java:367)
at MySigner.main(MySigner.java:105)
There are 3 certificates in the chain: it passes the first certificate
verification but in the second and third it fails and finally Signature
Exception.
Please let me know about the clue to resolve the above issue.
Thanks
Gurpreet Singh
<div class="pad5x10">Hi,<br><br>I have certified the PDF and embedded the
digital signature with timestamp using iText and Bouncy Castle API's. Can
anybody tells me that how to verify the PKCS#7 digital signature, certificate
chain and timestamp present in the PDF?
</div>
<div class="pad5x10"> </div>
<div class="pad5x10">I am using the same code present at the following URL:<
/div>
<div class="pad5x10"> </div>
<div class="pad5x10"><a href="http://itextpdf.sourceforge.net/howtosign.html
#howtoverify">http://itextpdf.sourceforge.net/howtosign.html#howtoverify</a><
/div>
<div class="pad5x10"> </div>
<div class="pad5x10">I have used the example given at the following location to
create the PKCS#7signature and timstamp using Bouncy Castle API:</div>
<div class="pad5x10"> </div>
<div class="pad5x10"><a href="http://www.nabble.com/PDF-Digital-signature-with
-timestamp---using-Time-Stamp-Authority---example-t4147508.html">http://www
.nabble.com/PDF-Digital-signature-with-timestamp---using-Time-Stamp-Authority--
-example-t4147508.html
</a></div>
<div class="pad5x10"> </div>
<div class="pad5x10">I am using external HSM device to read the keystore and
keys stored on it. But while verifying the signature, it is failing at the
following line:</div>
<div class="pad5x10"> </div>
<div class="pad5x10">java.security.SignatureException: Verification failed<br>
at com..crypto.<devieName>
;CertificateX509.verify(<HSMdeviceName>CertificateX509.java:461)<br>
at com..crypto.<deviceName>
CertificateX509.verify(<HSMDeviceName>CertificateX509.java:396)<br>
at pdf.certify.timestamp.PdfPKCS7
.verifyCertificates(PdfPKCS7.java:648)<br>
at MySigner.verify(MySigner.java:495)<br>
at MySigner.signPDF
(MySigner.java:367)<br> at MySigner
.main(MySigner.java:105)<br> </div>
<div class="pad5x10">There are 3 certificates in the chain: it passes the first
certificate verification but in the second and third it fails and finally
Signature Exception. </div>
<div class="pad5x10"> </div>
<div class="pad5x10">Please let me know about the clue to resolve the
above issue.</div>
<div class="pad5x10"> </div>
<div class="pad5x10">Thanks<br>Gurpreet Singh</div>
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