If you're still here, I have a question about inflating extracted data from a steg file

Question

If you're still here, I have a question about inflating extracted data from a steg file

Closed this issue 5 years ago · 9 comments

One of your samples: ndh2k12_sp113.bmp

zsteg -a ndh2k12_sp113.bmp
...
b1,rgb,lsb,yx       .. zlib: data="%PDF-1.4\n%\xC3\xA4\xC3\xBC\xC3\xB6\xC3\x9F\n2 0 obj\n<</Length 3 0 R/Filter/FlateDecode>>\nstream\nx\x9C\x8DT\xC9n\xDB@\f\xBD\xCFW\xF0\x1C \x13\x92\xB3\x03\x86\x80\xC8K\xD1\xDE\\\b\xE8\xA1...", offset=4, size=186                                                                                  
...

But I can't figure out how to inflate the data after I have extracted it. I have tried zlib-inflate, pigz, and faking headers for gzip.

Thanks

themaddoctor commented 5 years ago

Thanks

Answer 1 · 2020-01-14T15:31:35.000Z

fixed in zsteg-0.2.1
now you can extract it with zsteg samples/ndh2k12_sp113.bmp --extract b1,rgb,lsb,yx,zlib > data.pdf

Answer 2 · 2020-01-14T16:55:59.000Z

Thank you. I just upgraded zpng for this, and every time I run it I get
fatal: Not a git repository (or any parent up to mount point /mnt/quadrupole)
Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).

Since I am not trying to manage a git repository, but want to use the program on my local system,
how do I get rid of these messages?

Answer 3 · 2020-01-14T17:11:46.000Z

/usr/lib64/ruby/2.1.0/rubygems/dependency.rb:298:in `to_specs': Could not find 'rainbow' (~> 2.0.0) - did find: [rainbow-3.0.0] (Gem::LoadError)

Answer 4 · 2020-01-14T17:13:06.000Z

Hi. I believe it’s some weird your-system local problem( I had never seen such messages. reboot? relogin? try “which zsteg” try “irb” and then “require zsteg” are you using rvm? вт, 14 янв. 2020 г. в 19:56, themaddoctor <notifications@github.com>:

…

Thank you. I just upgraded zpng for this, and every time I run it I get fatal: Not a git repository (or any parent up to mount point /mnt/quadrupole) Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set). Since I am not trying to manage a git repository, but want to use the program on my local system, how do I get rid of these messages? — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#1?email_source=notifications&email_token=AAABOYTDDDKHDME7IECYKPLQ5XVCBA5CNFSM4FPLYLE2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEI5K7PA#issuecomment-574271420>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAABOYTZWGIFRXPCZUS4IATQ5XVCBANCNFSM4FPLYLEQ> .

Answer 5 · 2020-01-14T17:14:49.000Z

I found the problem with git; there was a problem with rainbow's spec file.
But what about finding rainbow 3 but wanting 2?

Answer 6 · 2020-01-14T17:20:14.000Z

I think problem is in the new gem dependencies. I’ll try to fix it tomorrow вт, 14 янв. 2020 г. в 20:14, themaddoctor <notifications@github.com>:

…

I found the problem with git; there was a problem with rainbow's spec file. But what about finding rainbow 3 but wanting 2? — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#1?email_source=notifications&email_token=AAABOYW5DQCHQ3A5RAXJQVTQ5XXITA5CNFSM4FPLYLE2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEI5M7WY#issuecomment-574279643>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAABOYWEUYXXWKNPZHRWK73Q5XXITANCNFSM4FPLYLEQ> .

Answer 7 · 2020-01-15T09:25:43.000Z

@themaddoctor please check now

Answer 8 · 2020-01-15T16:26:48.000Z

All is good. Thank you. Cnacu6o