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

[Akshay Saraswat]

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 at samsung.com>
Signed-off-by: Akshay Saraswat <akshay.s at samsung.com>
---
 common/Makefile     |  1 +
 common/cmd_sha256.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 70 insertions(+)
 create mode 100644 common/cmd_sha256.c

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