[U-Boot] [PATCH 3/4] gen: Add sha256 command

[Simon Glass <sjg@chromium.org>]

Hi Akshay,

On Wed, Feb 27, 2013 at 12:22 PM, Simon Glass <sjg@chromium.org> wrote:
> Hi Akshay,
>
> On Wed, Feb 27, 2013 at 7:24 AM, Akshay Saraswat <akshay.s@samsung.com> wrote:
>> sha256 command is added which can be used to test SHA 256 hash
>> algorithm.
>>
>> TEST=sha256 0x40008000 0x2B 0x40009000
>> Used mm and md to write a standard string to memory location
>> 0x40008000 and ran the above command to verify the output.
>>
>> Signed-off-by: ARUN MANKUZHI <arun.m@samsung.com>
>> Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
>> ---
>>  common/Makefile     |  1 +
>>  common/cmd_sha256.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++++
>>  2 files changed, 70 insertions(+)
>>  create mode 100644 common/cmd_sha256.c
>
> Rather than adding this command, can you please use 'hash sha256'
> instead? This is in common/hash.c.

And to be a bit more clear, if you plumb in your sha256 implementation
into the list of implementations at the top of hash.c, and put it
earlier than the software implementation, then it will get priority.

Regards,
Simon



>
> Regards,
> Simon
>
>>
>> diff --git a/common/Makefile b/common/Makefile
>> index 54fcc81..6170ed5 100644
>> --- a/common/Makefile
>> +++ b/common/Makefile
>> @@ -201,6 +201,7 @@ COBJS-$(CONFIG_MENU) += menu.o
>>  COBJS-$(CONFIG_MODEM_SUPPORT) += modem.o
>>  COBJS-$(CONFIG_UPDATE_TFTP) += update.o
>>  COBJS-$(CONFIG_USB_KEYBOARD) += usb_kbd.o
>> +COBJS-$(CONFIG_CMD_SHA256) += cmd_sha256.o
>>  COBJS-$(CONFIG_CMD_DFU) += cmd_dfu.o
>>  COBJS-$(CONFIG_CMD_GPT) += cmd_gpt.o
>>  endif
>> diff --git a/common/cmd_sha256.c b/common/cmd_sha256.c
>> new file mode 100644
>> index 0000000..e4f6b56
>> --- /dev/null
>> +++ b/common/cmd_sha256.c
>> @@ -0,0 +1,69 @@
>> +/*
>> + * Copyright 2000-2009
>> + * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
>> + *
>> + * See file CREDITS for list of people who contributed to this
>> + * project.
>> + *
>> + * This program is free software; you can redistribute it and/or
>> + * modify it under the terms of the GNU General Public License as
>> + * published by the Free Software Foundation; either version 2 of
>> + * the License, or (at your option) any later version.
>> + *
>> + * This program is distributed in the hope that it will be useful,
>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
>> + * GNU General Public License for more details.
>> + *
>> + * You should have received a copy of the GNU General Public License
>> + * along with this program; if not, write to the Free Software
>> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
>> + * MA 02111-1307 USA
>> + */
>> +
>> +#include <common.h>
>> +#include <command.h>
>> +#ifdef CONFIG_EXYNOS_ACE_SHA
>> +#include <asm/arch/ace_sha.h>
>> +#else
>> +#include <sha256.h>
>> +#endif
>> +
>> +int do_sha256(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
>> +{
>> +       unsigned long inlen;
>> +       unsigned char *input, *out;
>> +       int i;
>> +#ifndef CONFIG_EXYNOS_ACE_SHA
>> +       sha256_context sha_cnxt;
>> +#endif
>> +       if (argc < 4) {
>> +               printf("usage: sha256 <input> <input length> <output>\n");
>> +               return 0;
>> +       }
>> +       input = (unsigned char *)simple_strtoul(argv[1], NULL, 16);
>> +       inlen = simple_strtoul(argv[2], NULL, 16);
>> +       out = (unsigned char *)simple_strtoul(argv[3], NULL, 16);
>> +
>> +#ifdef CONFIG_EXYNOS_ACE_SHA
>> +       ace_sha_hash_digest(out, input, inlen, 2);
>> +#else
>> +       sha256_starts(&sha_cnxt);
>> +
>> +       sha256_update(&sha_cnxt, input, inlen);
>> +
>> +       sha256_finish(&sha_cnxt, out);
>> +#endif
>> +
>> +       for (i = 0; i < 32; i++)
>> +               printf("0x%02X ", out[i]);
>> +       printf("\n");
>> +
>> +       return 0;
>> +}
>> +
>> +U_BOOT_CMD(
>> +       sha256, 4, 1, do_sha256,
>> +       "print hash result",
>> +       "<input> <inputlength> <output>"
>> +);
>> --
>> 1.8.0
>>