[U-Boot] [PATCH 30/47] Kconfig: Add CONFIG_HASH to enable hashing API

Simon Glass
2017-05-15T10:57:45Z

At present CONFIG_CMD_HASH enables the 'hash' command which also brings
in the hashing API. Some boards may wish to enable the API without the
command. Add a separate CONFIG to permit this.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

cmd/Kconfig | 2 ++
common/Kconfig | 12 ++++++++++++
common/Makefile | 2 +-
common/hash.c | 4 ++--
4 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/cmd/Kconfig b/cmd/Kconfig
index b05e69a8b7..1e3cd02703 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -350,6 +350,7 @@ config CMD_MEMORY

config CMD_CRC32
bool "crc32"
+ select HASH
default y
help
Compute CRC32.
@@ -998,6 +999,7 @@ config CMD_BLOB

config CMD_HASH
bool "Support 'hash' command"
+ select HASH
help
This provides a way to hash data in memory using various supported
algorithms (such as SHA1, MD5, CRC32). The computed digest can be
diff --git a/common/Kconfig b/common/Kconfig
index 1879aefaf8..23bcf99a2c 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -493,4 +493,16 @@ config BOARD_EARLY_INIT_F

endmenu

+menu "Security support"
+
+config HASH
+ bool "Support hashing API (SHA1, SHA256, etc.)"
+ help
+ This provides a way to hash data in memory using various supported
+ algorithms (such as SHA1, MD5, CRC32). The API is defined in hash.h
+ and the algorithms it supports are defined in common/hash.c. See
+ also CMD_HASH for command-line access.
+
+endmenu
+
source "common/spl/Kconfig"
diff --git a/common/Makefile b/common/Makefile
index 14d01844ad..b2d663530d 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -10,7 +10,7 @@ ifndef CONFIG_SPL_BUILD
obj-y += init/
obj-y += main.o
obj-y += exports.o
-obj-y += hash.o
+obj-$(CONFIG_HASH) += hash.o
obj-$(CONFIG_HUSH_PARSER) += cli_hush.o
obj-$(CONFIG_AUTOBOOT) += autoboot.o

diff --git a/common/hash.c b/common/hash.c
index b645298afc..a0eded98d0 100644
--- a/common/hash.c
+++ b/common/hash.c
@@ -473,5 +473,5 @@ int hash_command(const char *algo_name, int flags, cmd_tbl_t *cmdtp, int flag,

return 0;
}
-#endif
-#endif
+#endif /* CONFIG_CMD_HASH || CONFIG_CMD_SHA1SUM || CONFIG_CMD_CRC32) */
+#endif /* !USE_HOSTCC */
--
2.13.0.rc2.291.g57267f2277-goog