That's to expected. The first time is to get the signature size and the second
time is to actually sign. This will be changed (as all the signing process) but
for the time being that's how it works.
Paulo
-----Original Message-----
From: Roberto Coppi [mailto:[email protected]]
Sent: Tuesday, November 30, 2010 2:10 PM
To: [email protected]
Subject: [iText-questions] Signing with external provider
Hi all!
I'm new to iText and I'm developing (in Java) a class to sign PDF
documents with a smartcard.
I'm using Sun PKCS11 provider to access certificates and keys on the
smartcard.
I've tried to set the external cryptographic provider in the
PdfSignatureAppearance and the signing process is working, but there is
a small problem:
the authentication's PIN is correctly asked once (to gain access to
Keystore), while the signing's PIN is asked 2 times instead of once.
Why? I don't believe it's a provider's configuration related problem
because I used the same configuration to sign documents with Bouncy
Castle in PKCS#7 format.
The relevant part of source code follows.
PdfReader reader = new PdfReader(isPdfToSign);
PdfStamper writer = PdfStamper.createSignature(reader, osPdfSigned, '\0');
PdfSignatureAppearance psa = writer.getSignatureAppearance();
psa.setReason("a reason");
psa.setLocation("here");
psa.setCrypto(privateKey, chain, null,
PdfSignatureAppearance.WINCER_SIGNED);
psa.setProvider("SunPKCS11-Actalis");
writer.close();
Thanks to anyone can support me
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