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% Copyright (C) 1996, 1997 Aladdin Enterprises. All rights reserved.
%
% This file is part of Aladdin Ghostscript.
%
% Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author
% or distributor accepts any responsibility for the consequences of using it,
% or for whether it serves any particular purpose or works at all, unless he
% or she says so in writing. Refer to the Aladdin Ghostscript Free Public
% License (the "License") for full details.
%
% Every copy of Aladdin Ghostscript must include a copy of the License,
% normally in a plain ASCII text file named PUBLIC. The License grants you
% the right to copy, modify and redistribute Aladdin Ghostscript, but only
% under certain conditions described in the License. Among other things, the
% License requires that the copyright notice and this notice be preserved on
% all copies.
% pdf_sec.ps
% Security hooks for PDF reader.
% This file contains the procedures that have to take encryption into
% account when reading a PDF file. There is no actual decryption code here,
% because U.S. export control laws might prohibit making this file available
% to anyone outside the U.S. if the code were included. Instead, you can
% get the real version of this file from
% http://www.ozemail.com.au/~geoffk/pdfencrypt/pdf_sec.ps
% or, if the ~ character upsets your software,
% http://www.ozemail.com.au/%7Egeoffk/pdfencrypt/pdf_sec.ps
% NOTE: these URLs are referenced in the error message below.
/.setlanguagelevel where { pop 2 .setlanguagelevel } if
.currentglobal true .setglobal
/pdfdict where { pop } { /pdfdict 100 dict def } ifelse
pdfdict begin
% Process the encryption information in the Trailer.
/pdf_process_Encrypt
{ (\n\n) print
( **** The PDF input file uses encryption and cannot be processed.\n) print
( **** Please get and install the patch available from\n) print
( **** http://www.ozemail.com.au/~geoffk/pdfencrypt/pdf_sec.ps\n) print
(\n\n) print flush
/pdfopen cvx /invalidfileaccess signalerror
} bind def
% Run the code to resolve an object reference.
/pdf_run_resolve
{ PDFfile resolveopdict .pdfrun
} bind def
% Prefix a decryption filter to a stream if needed.
% Stack: readdata? dict parms file/string filternames
/pdf_decrypt_stream
{
} bind def
end % pdfdict
.setglobal
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