[dm-crypt] REQUIRED CIPHERS TEST takes 20 minutes each for aes-related ciphers

christian at madez.de christian at madez.de
Thu Nov 28 14:25:48 CET 2013


I just compiled cryptsetup-1.6.2 on a machine with AES-NI. During the
compilation there were some tests. The lines of the output when the
issue occurred were:

#  Algorithm | Key |  Encryption |  Decryption
      aes-cbc   256b   975.0 MiB/s  2037065.0 MiB/s
      aes-lrw   384b  103909.0 MiB/s  158691.0 MiB/s
      aes-xts   512b  1731833.0 MiB/s  1681613.0 MiB/s
  twofish-cbc   256b   241.3 MiB/s   499.5 MiB/s
  twofish-lrw   384b   448.6 MiB/s   453.0 MiB/s
  twofish-xts   512b   497.0 MiB/s   496.0 MiB/s
  serpent-cbc   256b   108.5 MiB/s   351.3 MiB/s
  serpent-lrw   384b   333.7 MiB/s   333.0 MiB/s
  serpent-xts   512b   363.3 MiB/s   341.0 MiB/s
blowfish-cbc   256b   129.6 MiB/s   500.5 MiB/s
des3_ede-cbc   192b    34.3 MiB/s    35.4 MiB/s
    cast5-cbc   128b   121.9 MiB/s   474.0 MiB/s

The tests for aes-cbc, aes-lrw and aes-xts took very long (nearly one
hour for all three combined) on a Intel Core i5-4670K. All other tests
were finished in a few seconds.

Is this wanted behavior?

Best regards,
Christian Weinz

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