[U-Boot] [PATCH v2 3/8] fit: add sha256 support

[Heiko Schocher]

add sha256 support to fit images

Signed-off-by: Heiko Schocher <hs at denx.de>
Acked-by: Simon Glass <sjg at chromium.org>

---
changes for v2:
- add Acked-by from Simon Glass

 common/image-fit.c | 5 +++++
 include/image.h    | 9 +++++++++
 lib/sha256.c       | 2 +-
 tools/Makefile     | 3 +++
 4 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/common/image-fit.c b/common/image-fit.c
index cf4b67e..f32feb6 100644
--- a/common/image-fit.c
+++ b/common/image-fit.c
@@ -22,6 +22,7 @@ DECLARE_GLOBAL_DATA_PTR;
 
 #include <bootstage.h>
 #include <sha1.h>
+#include <sha256.h>
 #include <u-boot/crc.h>
 #include <u-boot/md5.h>
 
@@ -882,6 +883,10 @@ int calculate_hash(const void *data, int data_len, const char *algo,
 		sha1_csum_wd((unsigned char *)data, data_len,
 			     (unsigned char *)value, CHUNKSZ_SHA1);
 		*value_len = 20;
+	} else if (IMAGE_ENABLE_SHA256 && strcmp(algo, "sha256") == 0) {
+		sha256_csum_wd((unsigned char *)data, data_len,
+			       (unsigned char *)value, CHUNKSZ_SHA256);
+		*value_len = SHA256_SUM_LEN;
 	} else if (IMAGE_ENABLE_MD5 && strcmp(algo, "md5") == 0) {
 		md5_wd((unsigned char *)data, data_len, value, CHUNKSZ_MD5);
 		*value_len = 16;
diff --git a/include/image.h b/include/image.h
index 7de2bb2..f001a5f 100644
--- a/include/image.h
+++ b/include/image.h
@@ -57,13 +57,18 @@ struct lmb;
 #  ifdef CONFIG_SPL_SHA1_SUPPORT
 #   define IMAGE_ENABLE_SHA1	1
 #  endif
+#  ifdef CONFIG_SPL_SHA256_SUPPORT
+#   define IMAGE_ENABLE_SHA256	1
+#  endif
 # else
 #  define CONFIG_CRC32		/* FIT images need CRC32 support */
 #  define CONFIG_MD5		/* and MD5 */
 #  define CONFIG_SHA1		/* and SHA1 */
+#  define CONFIG_SHA256		/* and SHA256 */
 #  define IMAGE_ENABLE_CRC32	1
 #  define IMAGE_ENABLE_MD5	1
 #  define IMAGE_ENABLE_SHA1	1
+#  define IMAGE_ENABLE_SHA256	1
 # endif
 
 #ifndef IMAGE_ENABLE_CRC32
@@ -78,6 +83,10 @@ struct lmb;
 #define IMAGE_ENABLE_SHA1	0
 #endif
 
+#ifndef IMAGE_ENABLE_SHA256
+#define IMAGE_ENABLE_SHA256	0
+#endif
+
 #endif /* CONFIG_FIT */
 
 #ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
diff --git a/lib/sha256.c b/lib/sha256.c
index 7348162..5766de2 100644
--- a/lib/sha256.c
+++ b/lib/sha256.c
@@ -258,7 +258,7 @@ void sha256_csum_wd(const unsigned char *input, unsigned int ilen,
 {
 	sha256_context ctx;
 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
-	unsigned char *end, *curr;
+	const unsigned char *end, *curr;
 	int chunk;
 #endif
 
diff --git a/tools/Makefile b/tools/Makefile
index 328cea3..5e36e5e 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -71,6 +71,7 @@ EXT_OBJ_FILES-y += common/image-sig.o
 EXT_OBJ_FILES-y += lib/crc32.o
 EXT_OBJ_FILES-y += lib/md5.o
 EXT_OBJ_FILES-y += lib/sha1.o
+EXT_OBJ_FILES-y += lib/sha256.o
 
 # Source files located in the tools directory
 NOPED_OBJ_FILES-y += aisimage.o
@@ -223,6 +224,7 @@ $(obj)dumpimage$(SFX):	$(obj)aisimage.o \
 			$(obj)os_support.o \
 			$(obj)pblimage.o \
 			$(obj)sha1.o \
+			$(obj)sha256.o \
 			$(obj)ublimage.o \
 			$(LIBFDT_OBJS) \
 			$(RSA_OBJS)
@@ -252,6 +254,7 @@ $(obj)mkimage$(SFX):	$(obj)aisimage.o \
 			$(obj)os_support.o \
 			$(obj)pblimage.o \
 			$(obj)sha1.o \
+			$(obj)sha256.o \
 			$(obj)ublimage.o \
 			$(LIBFDT_OBJS) \
 			$(RSA_OBJS)
-- 
1.8.3.1