mkimage: use environment variable MKIMAGE_SIGN_PIN to set pin for OpenSSL Engine
This patch adds the possibility to pass the PIN the OpenSSL Engine
used during signing via the environment variable MKIMAGE_SIGN_PIN.
This follows the approach used during kernel module
signing ("KBUILD_SIGN_PIN") or UBIFS image
signing ("MKIMAGE_SIGN_PIN").
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
diff --git a/lib/rsa/rsa-sign.c b/lib/rsa/rsa-sign.c
index c64deac..085dc89 100644
--- a/lib/rsa/rsa-sign.c
+++ b/lib/rsa/rsa-sign.c
@@ -338,6 +338,7 @@
static int rsa_engine_init(const char *engine_id, ENGINE **pe)
{
+ const char *key_pass;
ENGINE *e;
int ret;
@@ -362,10 +363,20 @@
goto err_set_rsa;
}
+ key_pass = getenv("MKIMAGE_SIGN_PIN");
+ if (key_pass) {
+ if (!ENGINE_ctrl_cmd_string(e, "PIN", key_pass, 0)) {
+ fprintf(stderr, "Couldn't set PIN\n");
+ ret = -1;
+ goto err_set_pin;
+ }
+ }
+
*pe = e;
return 0;
+err_set_pin:
err_set_rsa:
ENGINE_finish(e);
err_engine_init: