[PATCH v2 26/29] scripts: imx-image: add support for CST_EXTRA_CMDLINE_OPTIONS

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

Add CST_EXTRA_CMDLINE_OPTIONS environment variable to allow build tools
like PTXdist or Yocto to pass additional cst command line options. This
becomes important for newer cst versions (> 3.3.1) since they support
multiple backends: ssl (default) and pkcs11.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
---
Changelog:
v2:
- unchaned
- v1-link: https://lore.barebox.org/barebox/20231010143314.2031253-1-m.felsch@pengutronix.de/T/#t

 scripts/imx/imx-image.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/scripts/imx/imx-image.c b/scripts/imx/imx-image.c
index 4a0a44b3a9b3..8a5768ca8b62 100644
--- a/scripts/imx/imx-image.c
+++ b/scripts/imx/imx-image.c
@@ -670,7 +670,7 @@ static int hab_sign(struct config_data *data, const char *csfcmds,
 	int fd, outfd, ret, lockfd;
 	char *csffile, *command;
 	struct stat s;
-	char *cst;
+	char *cst, *cstopts;
 	void *buf;
 	size_t csf_space = CSF_LEN;
 	unsigned int offset = 0;
@@ -679,6 +679,10 @@ static int hab_sign(struct config_data *data, const char *csfcmds,
 	if (!cst)
 		cst = "cst";
 
+	cstopts = getenv("CST_EXTRA_CMDLINE_OPTIONS");
+	if (!cstopts)
+		cstopts = "";
+
 	ret = asprintf(&csffile, "%s.slot%u.csfbin", data->outfile, csf_slot);
 	if (ret < 0)
 		exit(1);
@@ -716,11 +720,11 @@ static int hab_sign(struct config_data *data, const char *csfcmds,
 	if (ret == -1)
 		return -EINVAL;
 	else if (ret == 0)
-		ret = asprintf(&command, "%s -o %s -i /dev/stdin",
-			       cst, csffile);
+		ret = asprintf(&command, "%s -o %s -i /dev/stdin %s",
+			       cst, csffile, cstopts);
 	else
-		ret = asprintf(&command, "%s -o %s;",
-			       cst, csffile);
+		ret = asprintf(&command, "%s -o %s %s;",
+			       cst, csffile, cstopts);
 	if (ret < 0)
 		return -ENOMEM;
 
-- 
2.39.2