I've found how to solve the problem....
PdfReader reader = new PdfReader(parsedSignature.getSignatureFileBytes());
AcroFields af = reader.getAcroFields();
ArrayList names = af.getSignatureNames();
for (Object name1 : names) {
String name = (String) name1;
PdfDictionary dic = af.getSignatureDictionary(name);
PdfObject obj = dic.get(PdfName.CONTENTS);
PKCS7 p7 = new PKCS7(obj.getBytes());
result = p7.getSignerInfos()[0].getEncryptedDigest();
}
--- On Tue, 6/17/08, Dimiter Nikolov <[EMAIL PROTECTED]> wrote:
> From: Dimiter Nikolov <[EMAIL PROTECTED]>
> Subject: [iText-questions] Get PDF Signature bytes
> To: [email protected]
> Date: Tuesday, June 17, 2008, 4:59 PM
> I have signed PDF document. I have to get its signature
> bytes - not to verify the signature. How can I do that -
> I' ve tried the following :
> try{
> PdfReader reader = new
> PdfReader(signedDocBytes);
> AcroFields af = reader.getAcroFields();
> ArrayList names = af.getSignatureNames();
> for (Object name1 : names) {
> String name = (String) name1;
> PdfPKCS7 pk = af.verifySignature(name);
> byte[] ssig = pk.getEncodedPKCS7();
> System.out.println("TEST : " +
> ssig);
> }
> } catch (IOException e) {
> Auxilary.logException(e);
> }
>
> but an exception have been thrown : SignatureException:
> object not initialized for signing.
>
> Thanks in advance :)
> Dimitar Nikolov
>
>
>
>
>
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