From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Lee Jones <lee.jones@linaro.org>
Date: Tue, 5 Oct 2021 14:33:06 +0100
Subject: FROMLIST: sign-file: Use OpenSSL provided define to compile out
 deprecated APIs

OpenSSL's ENGINE API is deprecated in OpenSSL v3.0.

Use OPENSSL_NO_ENGINE to disallow its use and fall back on the BIO API.

This is required for fully hermetic builds in android-kernel.

Link: https://lore.kernel.org/lkml/20211005161833.1522737-1-lee.jones@linaro.org/
Fixes: bce40b72a381b ("ANDROID: Disable hermetic toolchain for allmodconfig builds")
Co-developed-by: Adam Langley <agl@google.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Change-Id: I5ecac477c274ef040934710fd4a042c133942e34
---
 scripts/sign-file.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/scripts/sign-file.c b/scripts/sign-file.c
--- a/scripts/sign-file.c
+++ b/scripts/sign-file.c
@@ -92,6 +92,7 @@ static void display_openssl_errors(int l)
 	}
 }
 
+#ifndef OPENSSL_NO_ENGINE
 static void drain_openssl_errors(void)
 {
 	const char *file;
@@ -101,6 +102,7 @@ static void drain_openssl_errors(void)
 		return;
 	while (ERR_get_error_line(&file, &line)) {}
 }
+#endif
 
 #define ERR(cond, fmt, ...)				\
 	do {						\
@@ -135,7 +137,9 @@ static int pem_pw_cb(char *buf, int len, int w, void *v)
 static EVP_PKEY *read_private_key(const char *private_key_name)
 {
 	EVP_PKEY *private_key;
+	BIO *b;
 
+#ifndef OPENSSL_NO_ENGINE
 	if (!strncmp(private_key_name, "pkcs11:", 7)) {
 		ENGINE *e;
 
@@ -153,17 +157,16 @@ static EVP_PKEY *read_private_key(const char *private_key_name)
 		private_key = ENGINE_load_private_key(e, private_key_name,
 						      NULL, NULL);
 		ERR(!private_key, "%s", private_key_name);
-	} else {
-		BIO *b;
-
-		b = BIO_new_file(private_key_name, "rb");
-		ERR(!b, "%s", private_key_name);
-		private_key = PEM_read_bio_PrivateKey(b, NULL, pem_pw_cb,
-						      NULL);
-		ERR(!private_key, "%s", private_key_name);
-		BIO_free(b);
+		return private_key;
 	}
+#endif
 
+	b = BIO_new_file(private_key_name, "rb");
+	ERR(!b, "%s", private_key_name);
+	private_key = PEM_read_bio_PrivateKey(b, NULL, pem_pw_cb,
+					      NULL);
+	ERR(!private_key, "%s", private_key_name);
+	BIO_free(b);
 	return private_key;
 }