Version 0.1 changelog

This is a changelog for version 0.1 final release. It will be closed on the release day.

Please do not comment. If you want to contribute, please drop a new issue.

Changelog

Version 0.1 alpha — #16

Bug report: `--custom-range` and custom `--nbits` are incompatible in improved algo

Due to the current implementation, using the improvements with the LaTeX custom range option is incompatible with a --nbits option different than 4 (the default).

This causes #6 and #7 as a side-effect.

This is deeply rooted in the algo, because of the way the improved version parses the TJ operators. It could be included in a broader effort of further improving the embedding method.

Use a robust input method for argument parsing

The current implementation in the dev branch (see ff02af6) has some hacks to ask for some "required options", it would be better to use a consistent mechanism.

Refactor code

Need pretty code with messaging, error handling, specifications...

Control verbosity with argparse count

New implementation of verbosity from #3 should be controlled by argparse using the count property of the -v option.

Bug report: `--custom-range` does not support some data/key combinations with improved algo

May be related to #8

Description

When the data is 5 characters (10 bytes, need to test with 11, 12 is ok) or shorter, the improved algo with custom range enabled (and --no-random for embedding) does not find the FlagStr end code.

How to reproduce

Use key "abcd" with data "abcd" to get a bad end position
Use key "abcd" with data "a" to get an end position not found

For instance:

KEY="abcd"; echo -n "abcd" | ./pdf_hide -vv -o /tmp/test_e.pdf -i -k $KEY --custom-range embed --no-random - /tmp/test.pdf && ./pdf_hide -vv -o /tmp/test_o.pdf -i -k $KEY --custom-range extract /tmp/test_e.pdf

Version 0.0 beta changelog

This is a changelog for version 0.0 beta. It will be closed on the release day.

Please do not comment. If you want to contribute, please drop a new issue.

Changelog

Refactored code - #2
Migrated to Python 3
Migrated to argparse - #3 #4 #5

Version 0.0 rc0 changelog

This is a changelog for version 0.0 release candidate 0. It will be closed on the release day.

Please do not comment. If you want to contribute, please drop a new issue.

Changelog

Fixed bugs about custom range and nbits — #6 #7 #8
Fixed bugs about custom range — #14
Fixed bugs in tests automation — #13
Fixed bugs with terminal emulation — mainly c75e87f
Packaged portable code — #11
Added multi-encoding support for datafile — #12
Refactored code — mainly 38b6283 and af0df61

Bug report: Custom redundancy tests can fail for basic algo

May be related to an improper check of the redundancy parameter, or to poor handling during operator selection.

Description

When running the tests, the basic algorithm with custom redundancy may fail due to not finding any valid TJ op.

How to reproduce

Use random seed b'^\xbe\xa1\x12V\xbf\xfd\xf3E\xb1\xf5\x84 x\xc1\x02' in tests.

Bug report: shifted CheckStr with full improvements

EDIT: This is a duplicate of #8.

Testing with full improvements, using RANDOM_SEED=0, results in CheckStr being shifted by 1 when extracting.

Investigating...

See log:

test_algoi_full_embed (__main__.SpecialAlgoImprovedTestCase) ...
DEBUG:  
===== CONFIG =====
DEBUG:  == input: "../sample/test_long.pdf.qdf"
DEBUG:  == redundancy: 0.8444218515250481
DEBUG:  == bit depth: 6
DEBUG:  == using improvements: YES
INFO:   Key: "S3cr3|-"
INFO:   Embedding data, please wait...
DEBUG:  FlagStr1 (CheckStr) (20)    [8, 45, 49, 15, 4, 54, 28, 60, 10, 23, 10, 34, 35, 5, 34, 39, 26, 0, 9, 24]
DEBUG:  FlagStr2 (20)   [7, 41, 36, 27, 33, 46, 27, 55, 41, 14, 28, 53, 41, 35, 62, 0, 21, 30, 31, 21]
DEBUG:  Data (35)   [12, 19, 8, 51, 13, 3, 20, 54, 21, 6, 33, 41, 28, 52, 37, 51, 16, 16, 40, 61, 31, 5, 61, 31, 21, 4, 21, 19, 21, 5, 61, 31, 31, 3, 13]
DEBUG:  Jitter  0
INFO:   Done embedding.
INFO:   Output file: "../sample/test_long.pdf.out.fix.pdf"
DEBUG:  Embedded data (28)  "123456ThisIsA
=|__TEST__|="
DEBUG:  Total nb of TJ ops  7537
DEBUG:  Total nb of TJ ops used 75
DEBUG:  Total nb of TJ ops used for data    35
ok

test_algoi_full_extract (__main__.SpecialAlgoImprovedTestCase) ...
DEBUG:  
===== CONFIG =====
DEBUG:  == input: "../sample/test_long.pdf.out.fix.pdf.qdf"
DEBUG:  == redundancy: 0.8444218515250481
DEBUG:  == bit depth: 6
DEBUG:  == using improvements: YES
INFO:   Key: "S3cr3|-"
INFO:   Input file: "../sample/test_long.pdf.out.fix.pdf"
INFO:   Extracting data, please wait...
DEBUG:  FlagStr (20)    [7, 41, 36, 27, 33, 46, 27, 55, 41, 14, 28, 53, 41, 35, 62, 0, 21, 30, 31, 21]
DEBUG:  End position found  71
DEBUG:  Data Checksum (20)  [22, 57, 5, 40, 55, 44, 36, 8, 55, 38, 1, 55, 43, 39, 49, 2, 43, 51, 55, 54]
DEBUG:  CheckStr (20)   [45, 49, 15, 4, 54, 28, 60, 10, 23, 10, 34, 35, 5, 34, 39, 26, 0, 9, 24, 12]
DEBUG:  Data (32)   [19, 8, 51, 13, 3, 20, 54, 21, 6, 33, 41, 28, 52, 37, 51, 16, 16, 40, 61, 31, 61, 31, 21, 4, 21, 19, 21, 61, 31, 31, 3, 13]
ERROR:  CheckStr does not match embedded data
M�\Ò\ÐB�_õõDU5}}ðÍcorrupted) (24)   L�Í
FAIL

Use proper logging management

The internal engine AND the CLI should use a proper logging management.

Version 0.0 changelog

This is a changelog for version 0.0 final release. It will be closed on the release day.

Please do not comment. If you want to contribute, please drop a new issue.

Changelog

Cosmetic
Fixed a bug with some combinations of options — 2c86318

Version 0.1 alpha changelog

This is a changelog for version 0.1 alpha. It will be closed on the release day.

Please do not comment. If you want to contribute, please drop a new issue.

Changelog

Please send me a sample data_file

Hi

Please send me a sample data_file in your command as follows :
python3 pdf_hide -k test -o target.pdf embed --no-random data_file mozilla.pdf -v

my data_file contents is :
This book is authorized to Kris

The output :
File "pdf_hide", line 195, in
main()
File "pdf_hide", line 170, in main
result = ps.embed(args.data.read(),args.key,norandom=args.norandom)
File "/home/hp/pdf_hide-master/pdfhide/pdf_algo.py", line 381, in embed
m = re.match(r'[(.*?)][ ]?TJ',line_[k:])
KeyboardInterrupt
Its taking long long time, waiting indefinitely. Please help

Regards
kris

Running on windows

Hi!

I understand this program is incompatible with Windows: I tried running it and it gave me an error related to qpdf. So I installed qpdf but now it says this:

====================
This is PDF_HIDE v0.0
====================
Please enter key:
'rm' is not recognized as an internal or external command,
operable program or batch file.
ERROR:  Not enough space available (only 0 available, 220 needed)

I understand rm is used to delete a temporary file, but what about Not enough space available?

Can you please provide some directions on how can one run this on Win10?

Many thanks!

ERROR: Not enough space available, though adequate disk space available!

Hi,

Trying to test the script without installing (directly from the pdf_hide executable from git repo).

$ ./pdf_hide -o ~/Downloads/tomb_manpage_pdf_hide.pdf embed ~/Downloads/pdf_hide_embedded.txt ~/Downloads/tomb_manpage.pdf 
====================
This is PDF_HIDE v0.0
====================
Please enter key: 
ERROR:	Not enough space available (only 15 available, 150 needed)

Strange that it reports of inadequate space even when the 4.4TB of space available!

Debug run shows:

$ pdf_hide -vvvvv -i -o tomb_manpage_pdf_hide.pdf embed ~/Downloads/pdf_hide_embedded.txt ~/Downloads/tomb_manpage.pdf
====================
This is PDF_HIDE v0.0
====================

PDF_HIDE  Copyright (C) 2013  Nicolas Canceill
Distributed under GNU General Public License v3
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to
redistribute it under certain conditions.
Please see LICENSE.md or http://www.gnu.org/licenses/ for details.

Please enter key: 
INFO:	Input file: "/home/zenny/Downloads/tomb_manpage.pdf"
INFO:	Embedding data, please wait...
DEBUG:	===== BEGIN CONFIG =====
DEBUG:	redundancy
	float
	0.1
DEBUG:	input
	str	[31]
	"tomb_manpage_pdf_hide.pdf.qdf"
DEBUG:	bit depth
	int
	4
DEBUG:	improvements
	bool
	True
DEBUG:	FlagStr1 (CheckStr)
	list	[20]
	[10, 3, 11, 12, 14, 3, 4, 9, 11, 3, 8, 8, 9, 2, 14, 3, 1, 13, 9, 12]
DEBUG:	Data to embed
	bytes	[55]
	b'Some random text.\n'
DEBUG:	Data to embed (binary)
	str	[440]
	01010100011010000110100101110011001000000110100101110011001000000110100101110011011100110111010101100101011001000010000001110100011011110010000001110011011100000110010101100011011010010110011001101001011000110010000001110000011001010111001001110011011011110110111000100000011101110110100101110100011010000010000001110011011100000110010101100011011010010110011001101001011000110010000001100101011011010110000101101001011011000010111000001010
DEBUG:	Data
	list	[110]
	[5, 4, 6, 8, 6, 9, 7, 3, 2, 0, 6, 9, 7, 3, 2, 0, 6, 9, 7, 3, 7, 3, 7, 5, 6, 5, 6, 4, 2, 0, 7, 4, 6, 15, 2, 0, 7, 3, 7, 0, 6, 5, 6, 3, 6, 9, 6, 6, 6, 9, 6, 3, 2, 0, 7, 0, 6, 5, 7, 2, 7, 3, 6, 15, 6, 14, 2, 0, 7, 7, 6, 9, 7, 4, 6, 8, 2, 0, 7, 3, 7, 0, 6, 5, 6, 3, 6, 9, 6, 6, 6, 9, 6, 3, 2, 0, 6, 5, 6, 13, 6, 1, 6, 9, 6, 12, 2, 14, 0, 10]
DEBUG:	FlagStr2
	list	[20]
	[1, 0, 13, 4, 0, 14, 6, 10, 5, 4, 3, 0, 0, 5, 2, 12, 13, 12, 2, 0]
DEBUG:	===== END CONFIG =====
ERROR:	Not enough space available (only 37 available, 150 needed

Cheers,

Do not hard-code encoding of datafile when embedding

Currently, the encoding of the input datafile used for embedding is hard-coded to UTF-8. For instance, this prevents the user from providing a pure binary file as the data to embed.

Bug report: FlagStr not found with full improvements

EDIT: This is a duplicate of #8.

Testing with full improvements, using RANDOM_SEED=123456, results in FlagStr not being found when extracting.

Investigating...

See log:

test_algoi_full_embed (__main__.SpecialAlgoImprovedTestCase) ...
DEBUG:  
===== CONFIG =====
DEBUG:  == input: "../sample/test_long.pdf.qdf"
DEBUG:  == redundancy: 0.8056271362589
DEBUG:  == bit depth: 6
DEBUG:  == using improvements: YES
INFO:   Key: "S3cr3|-"
INFO:   Embedding data, please wait...
DEBUG:  FlagStr1 (CheckStr) (20)    [8, 45, 49, 15, 4, 54, 28, 60, 10, 23, 10, 34, 35, 5, 34, 39, 26, 0, 9, 24]
DEBUG:  FlagStr2 (20)   [7, 41, 36, 27, 33, 46, 27, 55, 41, 14, 28, 53, 41, 35, 62, 0, 21, 30, 31, 21]
DEBUG:  Data (35)   [12, 19, 8, 51, 13, 3, 20, 54, 21, 6, 33, 41, 28, 52, 37, 51, 16, 16, 40, 61, 31, 5, 61, 31, 21, 4, 21, 19, 21, 5, 61, 31, 31, 3, 13]
DEBUG:  Jitter  0
INFO:   Done embedding.
INFO:   Output file: "../sample/test_long.pdf.out.fix.pdf"
DEBUG:  Embedded data (28)  "123456ThisIsA
=|__TEST__|="
DEBUG:  Total nb of TJ ops  7537
DEBUG:  Total nb of TJ ops used 75
DEBUG:  Total nb of TJ ops used for data    35
ok
test_algoi_full_extract (__main__.SpecialAlgoImprovedTestCase) ...
DEBUG:  
===== CONFIG =====
DEBUG:  == input: "../sample/test_long.pdf.out.fix.pdf.qdf"
DEBUG:  == redundancy: 0.8056271362589
DEBUG:  == bit depth: 6
DEBUG:  == using improvements: YES
INFO:   Key: "S3cr3|-"
INFO:   Input file: "../sample/test_long.pdf.out.fix.pdf"
INFO:   Extracting data, please wait...
DEBUG:  FlagStr (20)    [7, 41, 36, 27, 33, 46, 27, 55, 41, 14, 28, 53, 41, 35, 62, 0, 21, 30, 31, 21]
ERROR:  Ending code FlagStr not found
FAIL

Make code portable

Use distutils and tricks like os.path_join() to make the code portable.

ncanceill / pdf_hide Goto Github PK

pdf_hide's Introduction

PDF HIDE

Basic usage

Getting started

Requirements

Setup

Project status

Stability

Contributions

License information

pdf_hide's People

Contributors

Stargazers

Watchers

Forkers

pdf_hide's Issues

Version 0.1 changelog

Changelog

Description

How to reproduce

Version 0.0 beta changelog

Changelog

Version 0.0 rc0 changelog

Changelog

Description

How to reproduce

Version 0.0 changelog

Changelog

Version 0.1 alpha changelog

Changelog

Recommend Projects

Recommend Topics

Recommend Org