[PATCH v3 2/3] keytoc: add support to handle single env keyspec

[Marco Felsch <m.felsch@pengutronix.de>]

Since commit 685cc602e0ad ("keytoc: allow __ENV__ lookup for keyname
hint") the hint and key can be specified via two environment variables.

Using two environment variables for a single keyspec is not very
intuitive. Therefore this commit adds the support to specify the keyspec
via a single environment variable:

For example:

   FITKEY = "<hint>:<key>"
   CONFIG_CRYPTO_PUBLIC_KEYS="__ENV__FITKEY"

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
---
Changelog:
v3:
- keep Basti's use-case to provide the keyhint+key via two env-variables
v2:
- no changes

 scripts/keytoc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/scripts/keytoc.c b/scripts/keytoc.c
index 617317d6607e..67e2db3386db 100644
--- a/scripts/keytoc.c
+++ b/scripts/keytoc.c
@@ -737,6 +737,10 @@ int main(int argc, char *argv[])
 		char *keyname = NULL;
 		char *path = NULL;
 
+		keyspec = try_resolve_env(keyspec);
+		if (!keyspec)
+			exit(1);
+
 		if (!strncmp(keyspec, "pkcs11:", 7))
 			path = strdup(keyspec);
 		else
-- 
2.39.5