c# - iTextSharp sign verify fails even if acrobat verify that sign without error -

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i'm using itextsharp 5.4.2 , on sign acrobat verify correct , not corrupted sign sign not verified (here sample).

i debugged source code , found if rsadata in sign sha1 of content (20 bytes) messagedigest created sha256 , verifyrsadata = arrays.areequal(msgdigestbytes, rsadata) obiously fails. in opinion "error" in pdfpkcs7.cs @ line 335

the sign created filter /adobe.ppkms , subfilter /adbe.pkcs7.sha1

what's wrong ? take @ code fix ?

thank domenico


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