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Viewing changes to psi/zfarc4.c

  • Committer: Bazaar Package Importer
  • Author(s): Till Kamppeter
  • Date: 2009-01-20 16:40:45 UTC
  • mfrom: (1.1.10 upstream)
  • Revision ID: james.westby@ubuntu.com-20090120164045-lnfhi0n30o5lwhwa
Tags: 8.64.dfsg.1~svn9377-0ubuntu1
https://launchpad.net/bugs/317810
https://launchpad.net/bugs/314439
https://launchpad.net/bugs/314018
* New upstream release (SVN rev 9377)
   o Fixes many bugs concerning PDF rendering, to make the PDF printing
     workflow correctly working.
   o Fixes long-standing bugs in many drivers, like input paper tray and
     duplex options not working for the built-in PCL 4, 5, 5c, 5e, and
     6/XL drivers, PDF input not working for bjc600, bjc800, and cups
     output devices, several options not working and uninitialized
     memory with cups output device.
   o Merged nearly all patches of the Ubuntu and Debian packages upstream.
   o Fixes LP: #317810, LP: #314439, LP: #314018.
* debian/patches/03_libpaper_support.dpatch,
  debian/patches/11_gs-cjk_font_glyph_handling_fix.dpatch,
  debian/patches/12_gs-cjk_vertical_writing_metrics_fix.dpatch,
  debian/patches/13_gs-cjk_cjkps_examples.dpatch,
  debian/patches/20_bbox_segv_fix.dpatch,
  debian/patches/21_brother_7x0_gdi_fix.dpatch,
  debian/patches/22_epsn_margin_workaround.dpatch,
  debian/patches/24_gs_man_fix.dpatch,
  debian/patches/25_toolbin_insecure_tmp_usage_fix.dpatch,
  debian/patches/26_assorted_script_fixes.dpatch,
  debian/patches/29_gs_css_fix.dpatch,
  debian/patches/30_ps2pdf_man_improvement.dpatch,
  debian/patches/31_fix-gc-sigbus.dpatch,
  debian/patches/34_ftbfs-on-hurd-fix.dpatch,
  debian/patches/35_disable_libcairo.dpatch,
  debian/patches/38_pxl-duplex.dpatch,
  debian/patches/39_pxl-resolution.dpatch,
  debian/patches/42_gs-init-ps-delaybind-fix.dpatch,
  debian/patches/45_bjc600-bjc800-pdf-input.dpatch,
  debian/patches/48_cups-output-device-pdf-duplex-uninitialized-memory-fix.dpatch,
  debian/patches/50_lips4-floating-point-exception.dpatch,
  debian/patches/52_cups-device-logging.dpatch,
  debian/patches/55_pcl-input-slot-fix.dpatch,
  debian/patches/57_pxl-input-slot-fix.dpatch,
  debian/patches/60_pxl-cups-driver-pdf.dpatch,
  debian/patches/62_onebitcmyk-pdf.dpatch,
  debian/patches/65_too-big-temp-files-1.dpatch,
  debian/patches/67_too-big-temp-files-2.dpatch,
  debian/patches/70_take-into-account-data-in-stream-buffer-before-refill.dpatch:
  Removed, applied upstream.
* debian/patches/01_docdir_fix_for_debian.dpatch,
  debian/patches/02_gs_man_fix_debian.dpatch,
  debian/patches/01_docdir-fix-for-debian.dpatch,
  debian/patches/02_docdir-fix-for-debian.dpatch: Renamed patches to
  make merging with Debian easier.
* debian/patches/32_improve-handling-of-media-size-changes-from-gv.dpatch, 
  debian/patches/33_bad-params-to-xinitimage-on-large-bitmaps.dpatch:
  regenerated for new source directory structure.
* debian/rules: Corrected paths to remove cidfmap (it is in Resource/Init/
  in GS 8.64) and to install headers (source paths are psi/ and base/ now).
* debian/rules: Remove all fontmaps, as DeFoMa replaces them.
* debian/local/pdftoraster/pdftoraster.c,
  debian/local/pdftoraster/pdftoraster.convs, debian/rules: Removed
  added pdftoraster filter and use the one which comes with Ghostscript.
* debian/ghostscript.links: s/8.63/8.64/

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psi/zfarc4.c
 
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/* Copyright (C) 2001-2006 Artifex Software, Inc.
 
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   All Rights Reserved.
 
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   This software is provided AS-IS with no warranty, either express or
 
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   implied.
 
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   This software is distributed under license and may not be copied, modified
 
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   or distributed except as expressly authorized under the terms of that
 
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   license.  Refer to licensing information at http://www.artifex.com/
 
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   or contact Artifex Software, Inc.,  7 Mt. Lassen Drive - Suite A-134,
 
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   San Rafael, CA  94903, U.S.A., +1(415)492-9861, for further information.
 
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*/
 
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/* $Id: zfarc4.c 9043 2008-08-28 22:48:19Z giles $ */
 
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/* this is the ps interpreter interface to the arcfour cipher filter
 
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   used in PDF encryption. We provide both Decode and Encode filters;
 
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   the cipher is symmetric, so the call to the underlying routines is
 
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   identical between the two filters */
 
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#include "memory_.h"
 
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#include "ghost.h"
 
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#include "oper.h"
 
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#include "gsstruct.h"
 
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#include "ialloc.h"
 
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#include "idict.h"
 
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#include "stream.h"
 
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#include "strimpl.h"
 
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#include "ifilter.h"
 
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#include "sarc4.h"
 
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/* <source> <dict> arcfour/filter <file> */
 
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static int
 
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z_arcfour_d(i_ctx_t * i_ctx_p)
 
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{
 
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    os_ptr op = osp;            /* i_ctx_p->op_stack.stack.p defined in osstack.h */
 
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    ref *sop = NULL;
 
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    stream_arcfour_state state;
 
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    /* extract the key from the parameter dictionary */
 
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    check_type(*op, t_dictionary);
 
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    check_dict_read(*op);
 
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    if (dict_find_string(op, "Key", &sop) <= 0)
 
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        return_error(e_rangecheck);
 
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    s_arcfour_set_key(&state, sop->value.const_bytes, r_size(sop));
 
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    /* we pass npop=0, since we've no arguments left to consume */
 
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    /* we pass 0 instead of the usual rspace(sop) will allocate storage for 
 
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       filter state from the same memory pool as the stream it's coding. this
 
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       causes no trouble because we maintain no pointers */
 
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    return filter_read(i_ctx_p, 0, &s_arcfour_template,
 
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                       (stream_state *) & state, 0);
 
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}
 
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/* encode version of the filter */
 
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static int
 
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z_arcfour_e(i_ctx_t * i_ctx_p)
 
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{
 
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    os_ptr op = osp;            /* i_ctx_p->op_stack.stack.p defined in osstack.h */
 
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    ref *sop = NULL;
 
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    stream_arcfour_state state;
 
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    /* extract the key from the parameter dictionary */
 
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    check_type(*op, t_dictionary);
 
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    check_dict_read(*op);
 
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    if (dict_find_string(op, "Key", &sop) <= 0)
 
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        return_error(e_rangecheck);
 
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    s_arcfour_set_key(&state, sop->value.const_bytes, r_size(sop));
 
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    /* we pass npop=0, since we've no arguments left to consume */
 
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    /* we pass 0 instead of the usual rspace(sop) will allocate storage for 
 
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       filter state from the same memory pool as the stream it's coding. this
 
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       causes no trouble because we maintain no pointers */
 
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    return filter_write(i_ctx_p, 0, &s_arcfour_template,
 
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                        (stream_state *) & state, 0);
 
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}
 
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/* Match the above routines to their postscript filter names.
 
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   This is how our static routines get called externally. */
 
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const op_def zfarc4_op_defs[] = {
 
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    op_def_begin_filter(),
 
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    {"2ArcfourDecode", z_arcfour_d},
 
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    {"2ArcfourEncode", z_arcfour_e},
 
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    op_def_end(0)
 
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};