[U-Boot] [PATCH] imx: hab: extend hab_auth_img to calculate ivt_offset

[Parthiban Nallathambi]

Hi Breno,

On 11/21/18 2:24 PM, Breno Matheus Lima wrote:
> Hi Parthiban,
> 
> Em ter, 6 de nov de 2018 às 14:42, Parthiban Nallathambi <pn at denx.de> escreveu:
>>
>> Current implementation of hab_auth_img command needs ivt_offset to
>> authenticate the image. But ivt header is placed at the end of image
>> date after padding.
>>
>> This leaves the usage of hab_auth_img command to fixed size or static
>> offset for ivt header. New function "get_image_ivt_offset" is introduced
>> to find the ivt offset during runtime. The case conditional check in this
>> function is same as boot_get_kernel in common/bootm.c
>>
>> With this variable length image e.g. FIT image with any random size can
>> have IVT at the end and ivt_offset option can be left optional
>>
>> Can be used as "hab_auth_img $loadaddr $filesize" from u-boot script
>>
>> Signed-off-by: Parthiban Nallathambi <pn at denx.de>
>> ---
>>   arch/arm/mach-imx/hab.c | 29 +++++++++++++++++++++++++++--
>>   1 file changed, 27 insertions(+), 2 deletions(-)
>>
>> diff --git a/arch/arm/mach-imx/hab.c b/arch/arm/mach-imx/hab.c
>> index b88acd13da..060d0866b3 100644
>> --- a/arch/arm/mach-imx/hab.c
>> +++ b/arch/arm/mach-imx/hab.c
>> @@ -6,6 +6,8 @@
>>   #include <common.h>
>>   #include <config.h>
>>   #include <fuse.h>
>> +#include <mapmem.h>
>> +#include <image.h>
>>   #include <asm/io.h>
>>   #include <asm/system.h>
>>   #include <asm/arch/clock.h>
>> @@ -302,18 +304,41 @@ static int do_hab_status(cmd_tbl_t *cmdtp, int flag, int argc,
>>          return 0;
>>   }
>>
>> +static ulong get_image_ivt_offset(ulong img_addr, ulong length)
>> +{
> 
> I'm seeing that function get_image_ivt_offset() requires a length but
> we are not using it, there is any reason for that?

length is not required to find the ivt offset in the image. I will
remove this.

> 
> Thanks,
> Breno Lima
> 

-- 
Thanks,
Parthiban N

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-22 Fax: (+49)-8142-66989-80 Email: pn at denx.de