Date: Mon, 06 Jan 2014 05:31:31 +0100 From: magnum <john.magnum@...hmail.com> To: "john-dev@...ts.openwall.com" <john-dev@...ts.openwall.com> Subject: pkzip format vs. ChristmasGIFts.zip Solar, On 2014-01-06 02:52, magnum wrote: > On 2013-12-23 23:15, Solar Designer wrote: >> I've just tested bleeding-jumbo's zip2john and the pkzip format on: >> >> http://code.google.com/p/corkami/ >> http://corkami.googlecode.com/files/ChristmasGIFts.zip >> >> Surprisingly, it failed to crack the password, even though the password >> is trivial (I've even "cracked" it manually). I think zip2john might be >> confused by the very first entry in the .zip file being a directory, or >> it could be some other issue. > > I created an issue for this: > https://github.com/magnumripper/JohnTheRipper/issues/467 I'd appreciate knowing the password when debugging this. I tried a few but gave up because it seems impossible to script my unzip binary with passwords. The directory has nothing to do with it. Any entry with an uncompressed length < 12 is ignored. I first assumed this was an issue of "file magic" known-plain false negative (in which case I'd make that option non-default - the early rejection of Huffman encoding is quick enough now anyway) but that seems not to be the case - unless john somehow missed the "extremely easy" password, as Ange put it. magnum
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