The initramfs signature is the mod signature with a differing string
to assure that cpio archives with a signed module at the end can never
be confused for a valid signed initramfs.
To support this, add a -i option to sign-file, which replaces the
"Module signature appended" string with "initrd signature appended",
which is the same length.
Signed-off-by: Jeremy Linton <jeremy.linton@xxxxxxx>
---
scripts/sign-file.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/scripts/sign-file.c b/scripts/sign-file.c
index 7070245edfc1..bbf97a57311a 100644
--- a/scripts/sign-file.c
+++ b/scripts/sign-file.c
@@ -75,6 +75,7 @@ struct module_signature {
#define PKEY_ID_PKCS7 2
static char magic_number[] = "~Module signature appended~\n";
+static char magic_initrd[] = "~initrd signature appended~\n";
static __attribute__((noreturn))
void format(void)
@@ -226,6 +227,7 @@ int main(int argc, char **argv)
bool save_sig = false, replace_orig;
bool sign_only = false;
bool raw_sig = false;
+ bool initrd_sig = false;
unsigned char buf[4096];
unsigned long module_size, sig_size;
unsigned int use_signed_attrs;
@@ -253,7 +255,7 @@ int main(int argc, char **argv)
#endif
do {
- opt = getopt(argc, argv, "sdpk");
+ opt = getopt(argc, argv, "sdpki");
switch (opt) {
case 's': raw_sig = true; break;
case 'p': save_sig = true; break;
@@ -261,6 +263,7 @@ int main(int argc, char **argv)
#ifndef USE_PKCS7
case 'k': use_keyid = CMS_USE_KEYID; break;
#endif
+ case 'i': initrd_sig = true; break;
case -1: break;
default: format();
}
@@ -398,7 +401,11 @@ int main(int argc, char **argv)
sig_size = BIO_number_written(bd) - module_size;
sig_info.sig_len = htonl(sig_size);
ERR(BIO_write(bd, &sig_info, sizeof(sig_info)) < 0, "%s", dest_name);
- ERR(BIO_write(bd, magic_number, sizeof(magic_number) - 1) < 0, "%s", dest_name);
+ if (initrd_sig)
+ ERR(BIO_write(bd, magic_initrd, sizeof(magic_initrd) - 1) < 0, "%s", dest_name);
+ else
+ ERR(BIO_write(bd, magic_number, sizeof(magic_number) - 1) < 0, "%s", dest_name);
+
ERR(BIO_free(bd) != 1, "%s", dest_name);
--
2.46.0
