Linux Archive - opening a password protected pdf

On 03/10/2011 12:08 PM, Patton Echols wrote:
> I have agreed to modify an existing PDF to add fillable fields. My
> intention is to import it into OO Writer and work on it there. The PDF
> is readable and printable without a password, but OO demands a password
> to open it.
>
> I ran pdfcrack on it and, after a while got a result:
> found owner-password: 'pass5'
> found user-password: '
> (# Note: not the real password, but it is five characters)
>
> Problem is that OO does not think it is the correct password. I also
> tried pdftk to strip the password and it does not think that it is
> correct either. Anyone have experience that may shed some light? Other
> tools I might try?
>
> By the way, the company that "owns" the pdf is ok with my efforts, but
> the employee who created it is no longer available so I can't just ask
> for the correct password.
>
> Thanks,
> --PE
>

owner-password is only used to prevent making changes to the pdf,
user-password is for opening. Try opening in OOo Draw and just hit enter
at the password prompt.

For example, this file had only the owner-password set (to prevent changes):

$ pdfcrack -o --maxpw=4 --minpw=4 test_withpassword_test2.pdf
PDF version 1.4
Security Handler: Standard
V: 2
R: 3
P: -1028
Length: 128
Encrypted Metadata: True
FileID: 96cd26a09373440204dd9547bbc5e6c5
U: 034a647be2544a20f569efcf23ae8637000000000000000000 00000000000000
O: e600ecc20288ad8b0d64a929c6a83ee2517679aa0218beceea 8b7986726a8cdb
Average Speed: 22951.7 w/s. Current Word: 'Vz5b'
Average Speed: 22052.7 w/s. Current Word: 'HjWd'
Average Speed: 23501.5 w/s. Current Word: 'OAUf'
Average Speed: 23480.2 w/s. Current Word: '4KSh'
Average Speed: 23644.2 w/s. Current Word: 'dMRj'
Average Speed: 21754.7 w/s. Current Word: 'RXGl'
Average Speed: 18915.2 w/s. Current Word: 'wnhn'
Average Speed: 23377.8 w/s. Current Word: 'J0ep'
Average Speed: 22199.7 w/s. Current Word: 'Vv6q'
Average Speed: 20298.5 w/s. Current Word: 'O7Ns'
found owner-password: 'test'
found user-password: '

The owner-password 'test' is correct. There is no user-password set. If
I open in OOo I get the password prompt, but just hit 'Enter' & the
document opens just fine.

This one has both the owner and user password set. To open in OOo I need
to enter the user password 'test':

$ pdfcrack -o --maxpw=4 --minpw=4 test_withpassword.pdf
PDF version 1.4
Security Handler: Standard
V: 2
R: 3
P: -1028
Length: 128
Encrypted Metadata: True
FileID: 1e4991efd1c2bdfb3bc37fd1d2cf1703
U: 142e1cc2c183226c9dc5d3e5bc1f46b2000000000000000000 00000000000000
O: badad1e86442699427116d3e5d5271bc80a27814fc5e80f815 efeef839354c5f
Average Speed: 10081.9 w/s. Current Word: 'nC0a'
Average Speed: 8366.4 w/s. Current Word: 'd9Hb'
Average Speed: 10519.2 w/s. Current Word: 'wSAc'
Average Speed: 10766.4 w/s. Current Word: 'yTud'
Average Speed: 9127.8 w/s. Current Word: 'Znge'
Average Speed: 10034.9 w/s. Current Word: '3A6e'
Average Speed: 8511.9 w/s. Current Word: 'OSOf'
Average Speed: 5488.7 w/s. Current Word: 'mrhg'
Average Speed: 5515.7 w/s. Current Word: 'C8Jg'
Average Speed: 5635.6 w/s. Current Word: 'xsdh'
Average Speed: 7186.9 w/s. Current Word: 'TQOh'
Average Speed: 11140.4 w/s. Current Word: 'zOKi'
Average Speed: 11185.0 w/s. Current Word: 'C0Gj'
Average Speed: 11034.2 w/s. Current Word: '3pCk'
Average Speed: 7871.6 w/s. Current Word: 'inhl'
Average Speed: 10611.2 w/s. Current Word: 'gAam'
Average Speed: 11136.2 w/s. Current Word: 'Bw6m'
Average Speed: 10808.2 w/s. Current Word: '7K0n'
Average Speed: 10815.2 w/s. Current Word: 'U1Uo'
Average Speed: 11359.5 w/s. Current Word: 'f8Rp'
Average Speed: 11124.6 w/s. Current Word: 'P0Nq'
Average Speed: 11360.7 w/s. Current Word: 'z7Kr'
Average Speed: 11410.1 w/s. Current Word: 'fuIs'
found owner-password: 'test2'
found user-password: 'test'

Once opened I can edit.

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