Re: [dpdk-users] dpdk-users] [Snow 3g Hash API]

["De Lara Guarch, Pablo" <pablo.de.lara.guarch@intel.com>]

Hi Amartya,

> -----Original Message-----
> From: users [mailto:users-bounces@dpdk.org] On Behalf Of
> amartya.das@wipro.com
> Sent: Friday, July 08, 2016 3:58 PM
> To: users@dpdk.org
> Subject: [dpdk-users] dpdk-users] [Snow 3g Hash API]
> 
> Hi,
> 
> I am trying to integrate Snow3G API in our stack. I have made a below data
> dump to be used for unit test:
> 
> struct snow3g_hash_test_data snow3g_hash_test_case_2 = {
>                 .key = {
>                                 .data =
> {0xe4,0xa8,0x46,0x48,0x1e,0xbd,0x10,0x26,0x70,0xe2,0x3a,0xc0,0x32,0xfb,0xc
> a,0xe0},
>                                 .len = 16
>                 },
> 
>                 .aad = {
>                                 .data = {
>                                                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
>                                                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
>                                 },
>                                 .len = 16
>                 },
> 
>                 .plaintext = {
>                                 .data = {0x83, 0x32, 0x00, 0x10},
>                                 .len = 32
>                 },
>                 .validAuthLenInBits = {
>                                 .len = 32
>                                 },
>                 .validAuthOffsetLenInBits = {
>                                 .len = 128
>                 },
>                 .digest = {
>                                 .data = {0x38, 0xB5, 0x54, 0xC0 },
>                                 .len  = 4
>                 }
> };
> 
> 
> However, I want to test with count = 1024, dir = 01, fresh = 0 as per 3gpp test
> vector . In that case aad.data  value will be changed.
> 
> It will be a great help, if anybody could tell what will be add.data value for
> that and logic to put the data accordingly.

The AAD is the IV passed to the Snow3G f9 function. 
>From the 3GPP specifications, the IV is (from MSB to LSB):
IV_3 = COUNT[0-31]
IV_2 = FRESH[0-31]
IV_1 = DIRECTION[0] XOR COUNT[0] || COUNT[1-31]
IV_0 = FRESH[0-31]

So, in your case:
IV = 0x00000400,  0x00000000, 0x80000400, 0x00000000

Pablo
> 
> Thanks in advance.
> 
> BRs
> Amartya