Hi Paulo,
thanks for the info, but we append the 2nd signature as follows:
PdfStamper stp = PdfStamper.createSignature(reader, fout, '\0', null, true);
Below the code we use.
Can you maybe check the internal code of the PDF and see what is wrong ?
Thank a lot for your feedback.
We are really stuck with this ...
KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
ks.load(new FileInputStream("C:\\Data\\keystore\\test.keystore"),
"123456".toCharArray());
String alias = ks.aliases().nextElement();
PrivateKey key = (PrivateKey)ks.getKey(alias, "123456".toCharArray());
Certificate[] chain = ks.getCertificateChain(alias);
PdfReader reader = new
PdfReader("C:\\samples\\mill\\output\\Example_minimal-v300.pdf");
FileOutputStream fout = new
FileOutputStream("C:\\samples\\mill\\output\\Example_template-minimal-signed-itext-v300.pdf");
//PdfStamper stp = PdfStamper.createSignature(reader, fout, '\0');
PdfStamper stp = PdfStamper.createSignature(reader, fout, '\0', null, true);
PdfSignatureAppearance sap = stp.getSignatureAppearance();
sap.setCrypto(key, chain, null, PdfSignatureAppearance.SELF_SIGNED);
sap.setReason("I'm the author");
sap.setLocation("Lisbon");
//sap.setCertificationLevel(PdfSignatureAppearance.CERTIFIED_NO_CHANGES_ALLOWED);
// comment next line to have an invisible signature
sap.setVisibleSignature(new Rectangle(100, 100, 200, 200), 1, null);
stp.close();
Regards,
HT.
Paulo Soares wrote:
>
> The second and later signatures must be done in append mode.
>
> Paulo
>
> ----- Original Message -----
> From: "HidekiT" <[email protected]>
> To: <[email protected]>
> Sent: Sunday, December 28, 2008 11:46 AM
> Subject: [iText-questions] itext invalidates first signature. Why ?
>
>
>
> Hi,
>
> we get signed PDF documents made with 3rd party software we need to add
> additional signature with iText.
>
> Problem is that the 1st signature gets invalid when 2nd is added. The
> error
> is:
>
> Error during signature verification.
> Unexpected byte range values defining scope of signed data.
> Details: The signature byte range is invalid
>
> We don't understand why this happens ? When we open the original document
> (with only 1st signature) no error is given so why is this invalidated
> with
> iText when new signature is added ?
>
> I attach the file with the 2 signatures (only 10 kb) so if someone can
> tell
> us what the problem is we might solve it.
>
> Any help much appreciated.
>
>
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>
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>
>
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