On Thu, Sep 06, 2007 at 05:34:07PM +0200, Stefan Farestam wrote: > When using a directory encrypted with ecryptfs to serve an apache > webserver I am only getting garbage. The bizarre thing is that I have > no problem using the files from the encrypted directory when using other > applications such as emacs or the openoffice tools. To add to the > mystery, the files that are served are of identical length to the > original files and they all start with the roughly the same sequence of > bytes (dumped here using "od -c", note the occurrence of the strings > "3DUfw" and "_CONSOLE"):
These are the encrypted versions of the files; in other words, they
are the files in the lower filesystem, not the files in the eCryptfs
filesystem. Make sure that Apache is reading the files from the
correct directory. Keep in mind that, if you are doing an overlay
mount, there is no guarantee that any given application does not have
any references to the lower filesystem objects that were obtained
prior to performing the eCryptfs mount.
Mike
> file 1 (standard text file containg html):
> 0000000 \0 \0 \0 \0 \0 017 275 271 207 f p 030 273 347 307 355
> 0000020 002 \0 \0 002 \0 \0 \0 \0 001 214 - 004 \t 003 001
> 0000040 \0 021 " 3 D U f w ` V 364 326 372 366 C R
> 0000060 \v x y 275 033 @ V 5 376 225 | 236 P y 6 3
> 0000100 a , 252 366 257 ? V d z 355 026 b \b _ C O
> 0000120 N S O L E \0 \0 \0 \0 G 3 357 277 366 003 I
> 0000140 216 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
> 0000160 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
>
> file 2 (a tar.gz file):
> 0000000 \0 \0 \0 \0 \0 \0 002 210 ` E 231 375 \ 304 . \b
> 0000020 002 \0 \0 002 \0 \0 \0 \0 001 214 - 004 \t 003 001
> 0000040 \0 021 " 3 D U f w ` I 247 234 1 351 345 271
> 0000060 215 X 241 374 F 005 d 026 023 - { 332 \a G c 245
> 0000100 215 226 k l \a 023 342 332 n 355 026 b \b _ C O
> 0000120 N S O L E \0 \0 \0 \0 G 3 357 277 366 003 I
> 0000140 216 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
> 0000160 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
>
> I first thought that I observed an encoding problem of sorts, but the
> fact that two completely different files both have these mysterious
> sequences in the beginning of the file tells me that something else is
> going on.
>
> System info:
>
> os: Ubuntu Feisty
> kernel: 2.6.21.7 (no patches)
> ecryptfs module: from ecryptfs-20070821.tar.bz2
> ecryptfs utils: from ecryptfs-20070821.tar.bz2
>
> Thanks,
> Stefan
>
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