[Bug 591713] Re: Illegal instruction in AES ciphers on WinChip C6

[Launchpad Bug Tracker]

[Expired for openssl (Ubuntu) because there has been no activity for 60
days.]

** Changed in: openssl (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/591713

Title:
  Illegal instruction in AES ciphers on WinChip C6

Status in openssl package in Ubuntu:
  Expired

Bug description:
  Binary package hint: openssl

  Some ciphers from openssl-0.9.8k-7ubuntu8 in Ubuntu 10.04 terminate
  with an Illegal instruction signal (SIGILL) when running on a WinChip
  C6 processor:

  $ cat openssl.sh
  #!/bin/sh
  for c in `openssl list-cipher-commands`
  do
          echo $c
          echo -n Hello | openssl enc -$c -K 0 -iv 0 > /dev/null
  done
  $ openssl.sh
  aes-128-cbc
  Illegal instruction
  aes-128-ecb
  Illegal instruction
  aes-192-cbc
  Illegal instruction
  aes-192-ecb
  Illegal instruction
  aes-256-cbc
  Illegal instruction
  aes-256-ecb
  Illegal instruction
  base64
  bf
  bf-cbc
  bf-cfb
  bf-ecb
  bf-ofb
  cast
  cast-cbc
  cast5-cbc
  cast5-cfb
  cast5-ecb
  cast5-ofb
  des
  des-cbc
  des-cfb
  des-ecb
  des-ede
  des-ede-cbc
  des-ede-cfb
  des-ede-ofb
  des-ede3
  des-ede3-cbc
  des-ede3-cfb
  des-ede3-ofb
  des-ofb
  des3
  desx
  rc2
  rc2-40-cbc
  rc2-64-cbc
  rc2-cbc
  rc2-cfb
  rc2-ecb
  rc2-ofb
  rc4
  rc4-40

  I'm using a default kernel:

  $ uname -a
  Linux vdr 2.6.32-22-386 #36-Ubuntu SMP Fri Jun 4 00:27:09 UTC 2010 i586 GNU/Linux

  This is the CPU info:

  $ cat /proc/cpuinfo
  processor       : 0
  vendor_id       : CentaurHauls
  cpu family      : 5
  model           : 4
  model name      : WinChip C6
  stepping        : 1
  fdiv_bug        : no
  hlt_bug         : no
  f00f_bug        : no
  coma_bug        : no
  fpu             : yes
  fpu_exception   : yes
  cpuid level     : 1
  wp              : yes
  flags           : fpu de msr mce cx8 mmx centaur_mcr up
  bogomips        : 399.48
  clflush size    : 32
  cache_alignment : 32
  address sizes   : 32 bits physical, 32 bits virtual
  power management:

  I ran into this when I couldn't access this machine via ssh 4.7p1,
  because this version selects the aes128-cbc cipher by default. Ssh
  immediately terminates with "Connection closed by ...".

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