[RFC PATCH] mkimage: Allow -o to set hash algorithm in auto mode

[Joel Stanley]

Users would like to be able to create a FIT with hashed images using
using a given algorithm in auto mode. Allow them to use the existing -o
option for this.

In commit b93a65209c4a ("mkimage: fit: Support signed configurations in
'auto' FITs"), the examples lead me to believe this was already the
behavior, however -o only affects auto-conf mode.

The change in this commit does not affect the auto-conf behaviour.

Signed-off-by: Joel Stanley <joel at jms.id.au>
---
RFC. This is useful in testing that the hash infrastructure is working.
If there's no appetite for changing the mkimage behaviour then I
understand.

---
 tools/fit_image.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tools/fit_image.c b/tools/fit_image.c
index 0fccfbb4ebda..b3b0283eca83 100644
--- a/tools/fit_image.c
+++ b/tools/fit_image.c
@@ -217,6 +217,12 @@ static void fit_add_hash_or_sign(struct image_tool_params *params, void *fdt,
 	const char *hash_algo = "crc32";
 	bool do_hash = false;
 	bool do_sign = false;
+	char *algo_name = NULL;
+
+	if (params->algo_name) {
+		algo_name = strdup(params->algo_name);
+		hash_algo = strtok(algo_name, ",");
+	}
 
 	switch (params->auto_fit) {
 	case AF_OFF:
@@ -254,6 +260,9 @@ static void fit_add_hash_or_sign(struct image_tool_params *params, void *fdt,
 		fdt_property_string(fdt, FIT_KEY_HINT, params->keyname);
 		fdt_end_node(fdt);
 	}
+
+	if (algo_name)
+		free(algo_name);
 }
 
 /**
-- 
2.45.2