Bug 432955 - ecryptfs_cipher option doesn't work for des3_ede
ecryptfs_cipher option doesn't work for des3_ede
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: ecryptfs-utils (Show other bugs)
All Linux
low Severity low
: rc
: ---
Assigned To: Karsten Hopp
Depends On:
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Reported: 2008-02-15 07:58 EST by Jan Tluka
Modified: 2008-02-18 16:09 EST (History)
1 user (show)

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Doc Type: Bug Fix
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Last Closed: 2008-02-18 16:09:00 EST
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Description Jan Tluka 2008-02-15 07:58:40 EST
Description of problem:
When I try to mount ecryptfs filesystem with option 'ecryptfs_cipher=des3_ede' i
get an error and filesystem is not mounted.

Version-Release number of selected component (if applicable):
linux kernel 2.6.18-79.el5

How reproducible:
100% running mount.ecryptfs with appropriate options

Steps to Reproduce:
as root run following command:
mount.ecryptfs .secret/ .secret/ -o

Actual results:
- mount.ecryptfs output:
Attempting to mount with the following options:
Error mounting eCryptfs; rc = [-22]; strerr = [Invalid argument]. Check your
system logs; visit <http://ecryptfs.sourceforge.net/ecryptfs-faq.html>.

- dmesg output:
ecryptfs_parse_options: eCryptfs: unrecognized option 'verbosity=0'
Error attempting to set key of size [16] for cipher [des3_ede]; rc = [-22]
Error attempting to initialize key TFM cipher with name = [des3_ede]; rc = [-22]
Error attempting to initialize cipher with name = [des3_ede] and key size =
[16]; rc = [-22]
Error parsing options; rc = [-22]

Expected results:
Filesystem is mounted with no error.

Additional info:
Mount will succeed if I use 'cipher=des3_ede' instead of 'ecryptfs_cipher=des3_ede'.
I don't see this error when mounting with other ciphers.
Comment 1 Michael Halcrow 2008-02-18 16:09:00 EST
ecryptfs_key_bytes=16 is not valid with des3_ede; des3_ede requires a 24 byte
key. The cipher failing to initialize with a key size of 16 is expected behavior.


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