linux-kernel - [PATCH v2 3/6] sign-file: add support sign modules in bulk

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Date:   Tue, 14 Feb 2023 00:20:15 +0530
From:   Shreenidhi Shedi <yesshedi@...il.com>
To:     dhowells@...hat.com, dwmw2@...radead.org,
        gregkh@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org, Shreenidhi Shedi <sshedi@...are.com>
Subject: [PATCH v2 3/6] sign-file: add support sign modules in bulk

In the existing system, we need to invoke sign-file binary for every
module we want to sign. This patch adds support to give modules in bulk
and it will sign them all one by one.

Signed-off-by: Shreenidhi Shedi <sshedi@...are.com>
---
 scripts/sign-file.c | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/scripts/sign-file.c b/scripts/sign-file.c
index 4732201feb96..7ad330b47d64 100644
--- a/scripts/sign-file.c
+++ b/scripts/sign-file.c
@@ -224,6 +224,7 @@ struct cmd_opts {
 	bool replace_orig;
 	bool raw_sig;
 	bool sign_only;
+	bool bulk_sign;
 
 #ifndef USE_PKCS7
 	unsigned int use_keyid;
@@ -237,6 +238,7 @@ static void parse_args(int argc, char **argv, struct cmd_opts *opts)
 		{"help", no_argument, 0, 'h'},
 		{"savesig", no_argument, 0, 's'},
 		{"signonly", no_argument, 0, 'o'},
+		{"bulksign", no_argument, 0, 'b'},
 #ifndef USE_PKCS7
 		{"usekeyid", no_argument, 0, 'k'},
 #endif
@@ -305,6 +307,10 @@ static void parse_args(int argc, char **argv, struct cmd_opts *opts)
 			opts->replace_orig = true;
 			break;
 
+		case 'b':
+			opts->bulk_sign = true;
+			break;
+
 		case -1:
 			break;
 
@@ -342,12 +348,13 @@ int sign_file(int argc, char **argv, struct cmd_opts *opts)
 	bool replace_orig = opts->replace_orig;
 	bool raw_sig = opts->raw_sig;
 	bool sign_only = opts->sign_only;
+	bool bulk_sign = opts->bulk_sign;
 
 #ifndef USE_PKCS7
 	unsigned int use_keyid = opts->use_keyid;
 #endif
 
-	if (!argv[0] || argc != 1)
+	if ((bulk_sign && dest_name) || (!bulk_sign && argc != 1))
 		format();
 
 	if (dest_name && strcmp(argv[0], dest_name)) {
@@ -378,6 +385,16 @@ int sign_file(int argc, char **argv, struct cmd_opts *opts)
 	use_signed_attrs = PKCS7_NOATTR;
 #endif
 
+	for (i = 0; i < argc; i++) {
+		module_name = argv[i];
+
+		if (bulk_sign) {
+			ERR(asprintf(&dest_name, "%s.~signed~", module_name) < 0,
+					"asprintf");
+			if (!replace_orig)
+				replace_orig = true;
+		}
+
 	/* Open the module file */
 	bm = BIO_new_file(module_name, "rb");
 	ERR(!bm, "%s", module_name);
@@ -486,6 +503,7 @@ int sign_file(int argc, char **argv, struct cmd_opts *opts)
 	/* Finally, if we're signing in place, replace the original. */
 	if (replace_orig)
 		ERR(rename(dest_name, module_name) < 0, "%s", dest_name);
+	}
 
 	return 0;
 }
-- 
2.39.1