Mats' posting on encryption difficulties got me thinking about local variables. Are they supposed to persist after the script is done executing, so that the next time a handler within that script is called, they can be expected to hold previously set values? I notice that they don't. Or would this be a task for custom properties? Bill
William Prothero http://es.earthednet.org > On Feb 22, 2014, at 2:54 AM, Peter W A Wood <peterwaw...@gmail.com> wrote: > > Many thanks to Roger Eller, Jan Schenkel, Bill Vlahos and Paul Hibbert (off > list) for helping me identify and workaround the issues I encountered. > > Paul pointed out three things: I didn't the use "the text of Field ..."; how > to overcome not being able to copy text from a field in an OS X standalone; > and the final problem that was related to script local variables. > > Using "the text of Field ..." instead of "Field ..." helped to more > accurately copy and paste data. (I ended up displaying the encrypted data in > Hex anyway.) > > I had found that I couldn't copy from a Field in an OS X standalone. Paul > provide a script with group handlers to get around the problem. I have > submitted a bug report which has been accepted - > http://quality.runrev.com/show_bug.cgi?id=11830 > > At this stage, I was still getting inconsistent results when encrypting data > in the IDE or a standalone. Then Paul noticed how I was initialising the > encryption parameters, namely the script local variables tPassword, tSalt, > tIV: > > openStack > put "" into Field "Encrypted" > put "12345678123456781234567812345678" into tPassword > put "12345678123456781234567812345678" into tSalt > put "12345678123456781234567812345678" into tIV > end openStack > > on encryptMSG > ... > end encryptMSG > > on decryptMSG > ... > end decryptMSG > > He changed this to re-setting the three script local fields each time they > were used: > > on openStack > put "" into Field "Encrypted" > end openStack > > command setPassCodes > put "12345678123456781234567812345678" into tPassword > put "12345678123456781234567812345678" into tSalt > put "12345678123456781234567812345678" into tIV > end setPassCodes > > on encryptMSG > setPassCodes > ... > end encryptMSG > > on decryptMSG > setPassCodes > ... > end decryptMSG > > After making this change, I now get identical results when encrypting data > with the stack in the IDE or as a standalone. > > I have also entered a bug report for this - > http://quality.runrev.com/show_bug.cgi?id=11832 - I feel there is a bug but > not in the encrypt/decrypt functions, it's in the handling of script local > variables. > > Once again, thanks for all the help. > > Kind regards > Peter > http://LiveCode1001.blogspot.com > > > > _______________________________________________ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your subscription > preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
