Re: [Libguestfs] Hivex3: Saving values - always string
On Wed, Mar 05, 2014 at 03:42:33PM +0100, Martin Klíma wrote:
Hello,
thanks for answer, it works pretty good.
I'm still little bit confused about saving binary values. I
understand that there can be risk, to write wrong sequence of bites
to hive but in regular MS Regedit this posibility is and when
someone really know what he does, it should be able to change bites
directly.
The registry value has a binary field (with length) and a type byte.
The type byte -- in theory -- tells you what is in the binary field,
but actually nothing enforces that and real hives have all sorts of
impossible / random type fields.
So in hivex we don't try to interpret the type field, and recommend
you use h.value_value and carefully check the data you get back.
So how achieve that with hivex? I noticed that hivex return binary
data in hex string, function - "\xa5\xc6", but how to save this
data back? Should it be row binary string? "100001" or also some
string with specific coding? or hexadecimal values? I can't figure
it out...
h.value_value returns the value as a binary. You're probably printing
it using a function that coverts it to hex. h.node_set_value takes
only binary data.
If you post some working code showing precisely what you're trying to
do, we can help further.
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-p2v converts physical machines to virtual machines. Boot with a
live CD or over the network (PXE) and turn machines into KVM guests.
http://libguestfs.org/virt-v2v