[RESEND PATCH v2] sign-file: Fix incorrect return values check

[RESEND PATCH v2] sign-file: Fix incorrect return values check

[Yusong Gao]

There are some wrong return values check in sign-file when call OpenSSL
API. For example the CMS_final() return 1 for success or 0 for failure.
The ERR() check cond is wrong because of the program only check the
return value is < 0 instead of <= 0.

Link:
https://www.openssl.org/docs/manmaster/man3/CMS_final.html
https://www.openssl.org/docs/manmaster/man3/i2d_CMS_bio_stream.html
https://www.openssl.org/docs/manmaster/man3/i2d_PKCS7_bio.html
https://www.openssl.org/docs/manmaster/man3/BIO_free.html

Signed-off-by: Yusong Gao <a869920004@gmail.com>
---
 scripts/sign-file.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/scripts/sign-file.c b/scripts/sign-file.c
index 598ef5465f82..dcebbcd6bebd 100644
--- a/scripts/sign-file.c
+++ b/scripts/sign-file.c
@@ -322,7 +322,7 @@ int main(int argc, char **argv)
 				     CMS_NOSMIMECAP | use_keyid |
 				     use_signed_attrs),
 		    "CMS_add1_signer");
-		ERR(CMS_final(cms, bm, NULL, CMS_NOCERTS | CMS_BINARY) < 0,
+		ERR(CMS_final(cms, bm, NULL, CMS_NOCERTS | CMS_BINARY) <= 0,
 		    "CMS_final");
 
 #else
@@ -341,10 +341,10 @@ int main(int argc, char **argv)
 			b = BIO_new_file(sig_file_name, "wb");
 			ERR(!b, "%s", sig_file_name);
 #ifndef USE_PKCS7
-			ERR(i2d_CMS_bio_stream(b, cms, NULL, 0) < 0,
+			ERR(i2d_CMS_bio_stream(b, cms, NULL, 0) <= 0,
 			    "%s", sig_file_name);
 #else
-			ERR(i2d_PKCS7_bio(b, pkcs7) < 0,
+			ERR(i2d_PKCS7_bio(b, pkcs7) <= 0,
 			    "%s", sig_file_name);
 #endif
 			BIO_free(b);
@@ -374,9 +374,9 @@ int main(int argc, char **argv)
 
 	if (!raw_sig) {
 #ifndef USE_PKCS7
-		ERR(i2d_CMS_bio_stream(bd, cms, NULL, 0) < 0, "%s", dest_name);
+		ERR(i2d_CMS_bio_stream(bd, cms, NULL, 0) <= 0, "%s", dest_name);
 #else
-		ERR(i2d_PKCS7_bio(bd, pkcs7) < 0, "%s", dest_name);
+		ERR(i2d_PKCS7_bio(bd, pkcs7) <= 0, "%s", dest_name);
 #endif
 	} else {
 		BIO *b;
@@ -396,7 +396,7 @@ int main(int argc, char **argv)
 	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);
 
-	ERR(BIO_free(bd) < 0, "%s", dest_name);
+	ERR(BIO_free(bd) <= 0, "%s", dest_name);
 
 	/* Finally, if we're signing in place, replace the original. */
 	if (replace_orig)
-- 
2.34.1

Re: [RESEND PATCH v2] sign-file: Fix incorrect return values check

[Jarkko Sakkinen]

On Mon Nov 20, 2023 at 3:33 AM EET, Yusong Gao wrote:
> There are some wrong return values check in sign-file when call OpenSSL
> API. For example the CMS_final() return 1 for success or 0 for failure.

Why not make it a closed sentence and list the functions that need to be
changed?

> The ERR() check cond is wrong because of the program only check the
> return value is < 0 instead of <= 0.
>

Lacking Fixes tag(s). See: ttps://www.kernel.org/doc/html/latest/process/submitting-patches.html

> Link:
> https://www.openssl.org/docs/manmaster/man3/CMS_final.html
> https://www.openssl.org/docs/manmaster/man3/i2d_CMS_bio_stream.html
> https://www.openssl.org/docs/manmaster/man3/i2d_PKCS7_bio.html
> https://www.openssl.org/docs/manmaster/man3/BIO_free.html

Replace with

Link: https://www.openssl.org/docs/manmaster/man3/

BR, Jarkko

[RESEND PATCH v2] sign-file: Fix incorrect return values check

[Yusong Gao]

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[-- Attachment #1: Type: text/plain; charset=y, Size: 1035 bytes --]

On Tue, Nov 21, 2023 at 7:44 AM Jarkko Sakkinen <jarkko@kernel.org>
wrote:
>
> On Mon Nov 20, 2023 at 3:33 AM EET, Yusong Gao wrote:
> > There are some wrong return values check in sign-file when call
> > OpenSSL
> > API. For example the CMS_final() return 1 for success or 0 for
> > failure.
>
> Why not make it a closed sentence and list the functions that need to
> be
> changed?
>
> > The ERR() check cond is wrong because of the program only check the
> > return value is < 0 instead of <= 0.
> >
>
> Lacking Fixes tag(s). See:
> ttps://www.kernel.org/doc/html/latest/process/submitting-patches.html
>
> > Link:
> > https://www.openssl.org/docs/manmaster/man3/CMS_final.html
> > https://www.openssl.org/docs/manmaster/man3/i2d_CMS_bio_stream.html
> > https://www.openssl.org/docs/manmaster/man3/i2d_PKCS7_bio.html
> > https://www.openssl.org/docs/manmaster/man3/BIO_free.html
>
> Replace with
>
> Link: https://www.openssl.org/docs/manmaster/man3/
>
> BR, Jarkko

Thanks a lot for you comments, I will fix that.

BR, Yusong Gao