Parity Error on keys used for DES crypto test

Parity Error on keys used for DES crypto test

[leroy christophe]

Hi,

I'm altering the Freescale Talitos Driver in order to support the SEC1 
security engine, and I have a big issue with the DES test vectors in 
testmgr.h:

The Sec Engine reports key parity error.

Looking at the keys defined in testmgr.h for DES3, it looks like there 
is a real parity issue with the test vectors. A DES key is supposed to 
have all bytes with an odd number of ones. It is not the case in the key 
below. At least the second byte 0xC0 has an even number of ones.

static struct cipher_testvec des3_ede_cbc_enc_tv_template[] = {
     { /* Generated from openssl */
         .key    = "\xE9\xC0\xFF\x2E\x76\x0B\x64\x24"
               "\x44\x4D\x99\x5A\x12\xD6\x40\xC0"
               "\xEA\xC2\x84\xE8\x14\x95\xDB\xE8",

So, how can this test vector work ?

Christophe

Re: Parity Error on keys used for DES crypto test

[Kim Phillips]

On Wed, 23 Apr 2014 10:20:16 +0200
leroy christophe <christophe.leroy@c-s.fr> wrote:

> I'm altering the Freescale Talitos Driver in order to support the SEC1 
> security engine, and I have a big issue with the DES test vectors in 
> testmgr.h:
> 
> The Sec Engine reports key parity error.
> 
> Looking at the keys defined in testmgr.h for DES3, it looks like there 
> is a real parity issue with the test vectors. A DES key is supposed to 
> have all bytes with an odd number of ones. It is not the case in the key 
> below. At least the second byte 0xC0 has an even number of ones.
> 
> static struct cipher_testvec des3_ede_cbc_enc_tv_template[] = {
>      { /* Generated from openssl */
>          .key    = "\xE9\xC0\xFF\x2E\x76\x0B\x64\x24"
>                "\x44\x4D\x99\x5A\x12\xD6\x40\xC0"
>                "\xEA\xC2\x84\xE8\x14\x95\xDB\xE8",
> 
> So, how can this test vector work ?

I'm not going to comment on the validity of the test key vector
other than to say that you can turn off key parity errors in the
SEC1 in the DEU Interrupt Control Register.

Kim

Re: Parity Error on keys used for DES crypto test

[leroy christophe]

Le 24/04/2014 01:58, Kim Phillips a écrit :
> On Wed, 23 Apr 2014 10:20:16 +0200
> leroy christophe <christophe.leroy@c-s.fr> wrote:
>
>> I'm altering the Freescale Talitos Driver in order to support the SEC1
>> security engine, and I have a big issue with the DES test vectors in
>> testmgr.h:
>>
>> The Sec Engine reports key parity error.
>>
>> Looking at the keys defined in testmgr.h for DES3, it looks like there
>> is a real parity issue with the test vectors. A DES key is supposed to
>> have all bytes with an odd number of ones. It is not the case in the key
>> below. At least the second byte 0xC0 has an even number of ones.
>>
>> static struct cipher_testvec des3_ede_cbc_enc_tv_template[] = {
>>       { /* Generated from openssl */
>>           .key    = "\xE9\xC0\xFF\x2E\x76\x0B\x64\x24"
>>                 "\x44\x4D\x99\x5A\x12\xD6\x40\xC0"
>>                 "\xEA\xC2\x84\xE8\x14\x95\xDB\xE8",
>>
>> So, how can this test vector work ?
> I'm not going to comment on the validity of the test key vector
> other than to say that you can turn off key parity errors in the
> SEC1 in the DEU Interrupt Control Register.
>
> Kim
>
Thanks, it works

Christophe