From: Milan Broz <mbroz@redhat.com>
To: ".. ink .." <mhogomchungu@gmail.com>
Cc: dm-crypt@saout.de
Subject: Re: [dm-crypt] luksFormat library API doesnt seem to work with large keyfiles.
Date: Tue, 17 Jan 2012 09:44:32 +0100 [thread overview]
Message-ID: <4F1534F0.7010900@redhat.com> (raw)
In-Reply-To: <CAFnMBaT12UmzJZ+wCUNmwa1XsgdjiYxfQc+Pkj6V3sW=rFqimg@mail.gmail.com>
On 01/17/2012 09:05 AM, .. ink .. wrote:
> using cryptsetup 1.4.1
>
> test case below.
(please also read examples in docs/examples)
> key1 keyfile is a text file with 64 characters in it.
> key.cr <http://key.cr> is a 4.3MB mp3 file.
...
> status = crypt_keyslot_add_by_volume_key( cd,CRYPT_ANY_SLOT,NULL,32,c,strlen( c ) );
I guess strlen(c) is wrong, it will stop on the first zero (mp3 is binary data, not C string).
What about use st.st_size here?
About limits - there is default/compiled one but you can always override
it through API, exactly as you did above.
(Also see cryptsetup --help - "Default compiled-in keyfile parameters", you have
to override keyfile size using --keyfile-size option if it is over compiled-in limit
in CLI command.)
Milan
next prev parent reply other threads:[~2012-01-17 8:44 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-17 8:05 [dm-crypt] luksFormat library API doesnt seem to work with large keyfiles .. ink ..
2012-01-17 8:44 ` Milan Broz [this message]
2012-01-18 3:15 ` .. ink ..
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