signature

I have implemented a test app with Android's In-App Billing. I have filled in my Public Key in the Security.java file. Everything works, but when I submit the payment, the app crashes. I receive an error in LogCat that says "Signature Verification Failed", which corresponds to this bit of code: if (!sig.verify(Base64.decode(signature))) { Log.e(TAG, "Signature verification failed."); return false; } If I change that bit to return true instead of return false, then everything works properly - I can submit payment and safely return to the app - but I am assuming that something else is wrong,

Summary: I am working on a .NET 4.0 WCF client to consume a web service (DataPower, Java service on the other end) using SOAP 1.1 and WS-Security 1.0. The WCF client must implement a client certificate for mutual authentication at the transport layer. The message body needs to be signed using a separate service/signing certificate. The SOAP header also needs to contain a Username Token with Password Digest and include Nonce and Created tags. I am able to consume this web service using WSE 3.0 with BasicHTTPBinding. But I have not been successful so far in implementing the same with WCF using

i want to create a signature area like Here with dart in a mobile app! I tried to use the CustomPaint class ... But it doesn't work. Can anyone help me? You can create a signature area using GestureDetector to record touches and CustomPaint to draw on the screen. Here are a few tips: Use RenderBox.globalToLocal to convert the DragUpdateDetails provided by GestureDetector.onPanUpdate into relative coordinates Use a GestureDetector.onPanEnd gesture handler to record the breaks between strokes. Mutating the same List won't automatically trigger a repaint because the CustomPainter constructor

I'm currently working on a tool for applying and verifying digital signatures on pdf documents. I understand that each signature in a pdf document is applied to a certain revision of the AcroFields. Each time the user changes some input (i.e. by filling out a pdf form), a new revision is created. My question is: how can I retrieve all revisions from an AcroFields object? I know how to get a single revision if I have its name like this: AcroFields fields = ...; fields.getRevision("revision1"); But how can I retrieve all revisions (or their names, at least)? I haven't found anything in the iText

I have a button on my worksheet to send an email (plus more, but not important). I want my default signature with its HTML formatting but neither option is producing the results I want: .Body produces the correct body (fonts and carriage returns) but the signature is plain text .HMTLBody produces the correct signature but the body for some reason, the font goes to Times New Roman instead of the default Calibri, and the carriage returns don't work whether I use vbNewLine , vbCr , or vbCrLf Am I just S.O.L.? Do I need to just pick one and deal with it, or is there a way for me to have my cake

Is it possible to extract the visible signature (image of capture) of an signed PDF with the OSS libary PDFBox? Workflow: - list all signatures of a file - show with signatures include an visible signature - show which are valid - extract images of signatures (need to extract correct image for each signature) something in oop style like following would be awesome: PDFSignatures [] sigs = document.getPDFSignatures() sig[0].getCN() ... (Buffered)Image visibleSig = sig[0].getVisibleSignature() Found class PDSignature and how to sign a PDF, but not a solution to extract an visible signature as