[U-Boot] [PATCH 09/17] Add sha256 command for hashing

[Simon Glass]

From: ARUN MANKUZHI <arun.m at samsung.com>

sha256 command is added which can be used to test SHA 256 hash
algorithm.

Signed-off-by: ARUN MANKUZHI <arun.m at samsung.com>
Signed-off-by: Simon Glass <sjg at chromium.org>
---
 README                   |    1 +
 common/Makefile          |    1 +
 common/cmd_sha256.c      |   57 ++++++++++++++++++++++++++++++++++++++++++++++
 include/config_cmd_all.h |    1 +
 4 files changed, 60 insertions(+), 0 deletions(-)
 create mode 100644 common/cmd_sha256.c

diff --git a/README b/README
index 785953f..31e25fe 100644
--- a/README
+++ b/README
@@ -861,6 +861,7 @@ The following options need to be configured:
 					  (requires CONFIG_CMD_I2C)
 		CONFIG_CMD_SETGETDCR	  Support for DCR Register access
 					  (4xx only)
+		CONFIG_CMD_SHA256	* Calculate SHA256 for block
 		CONFIG_CMD_SF		* Read/write/erase SPI NOR flash
 		CONFIG_CMD_SHA1SUM	  print sha1 memory digest
 					  (requires CONFIG_CMD_MEMORY)
diff --git a/common/Makefile b/common/Makefile
index 84968f8..6f6f0fa 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -150,6 +150,7 @@ COBJS-$(CONFIG_CMD_SF) += cmd_sf.o
 COBJS-$(CONFIG_CMD_SCSI) += cmd_scsi.o
 COBJS-$(CONFIG_CMD_SHA1SUM) += cmd_sha1sum.o
 COBJS-$(CONFIG_CMD_SETEXPR) += cmd_setexpr.o
+COBJS-$(CONFIG_CMD_SHA256) += cmd_sha256.o
 COBJS-$(CONFIG_CMD_SPI) += cmd_spi.o
 COBJS-$(CONFIG_CMD_SPIBOOTLDR) += cmd_spibootldr.o
 COBJS-$(CONFIG_CMD_STRINGS) += cmd_strings.o
diff --git a/common/cmd_sha256.c b/common/cmd_sha256.c
new file mode 100644
index 0000000..006391d
--- /dev/null
+++ b/common/cmd_sha256.c
@@ -0,0 +1,57 @@
+/*
+ * 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>
+#include <sha256.h>
+
+int do_sha256(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	unsigned long inlen;
+	unsigned char *input, *out;
+	int i;
+	sha256_context sha_cnxt;
+	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);
+
+	sha256_starts(&sha_cnxt);
+	sha256_update(&sha_cnxt, input, inlen);
+	sha256_finish(&sha_cnxt, out);
+
+	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>"
+);
diff --git a/include/config_cmd_all.h b/include/config_cmd_all.h
index 148d676..efd17e6 100644
--- a/include/config_cmd_all.h
+++ b/include/config_cmd_all.h
@@ -79,6 +79,7 @@
 #define CONFIG_CMD_SDRAM	/* SDRAM DIMM SPD info printout */
 #define CONFIG_CMD_SETEXPR	/* setexpr support		*/
 #define CONFIG_CMD_SETGETDCR	/* DCR support on 4xx		*/
+#define CONFIG_CMD_SHA256	/* Calculate SHA256 for block	*/
 #define CONFIG_CMD_SNTP		/* SNTP support			*/
 #define CONFIG_CMD_SOURCE	/* "source" command support	*/
 #define CONFIG_CMD_SPI		/* SPI utility			*/
-- 
1.7.7.3