[PATCH] ubifs-utils: Don't compile engine support if not available

[Sebastian Andrzej Siewior]

OpenSSL 4.0 dropped engine support which was deprecated since 3.0. The
replacement is the "providers" API.

Add an ifndef OPENSSL_NO_ENGINE around the engine code so it can be left
out where it is not supported.

Signed-off-by: Sebastian Andrzej Siewior <sebastian at breakpoint.cc>
---
 ubifs-utils/common/sign.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/ubifs-utils/common/sign.c b/ubifs-utils/common/sign.c
index 032a6acc045d..5f94c0ad176f 100644
--- a/ubifs-utils/common/sign.c
+++ b/ubifs-utils/common/sign.c
@@ -23,11 +23,14 @@
 #include <openssl/bio.h>
 #include <openssl/pem.h>
 #include <openssl/err.h>
-#include <openssl/engine.h>
 #include <openssl/cms.h>
 #include <openssl/conf.h>
 #include <err.h>
 
+#ifndef OPENSSL_NO_ENGINE
+#include <openssl/engine.h>
+#endif
+
 #include "linux_types.h"
 #include "sign.h"
 #include "ubifs.h"
@@ -139,6 +142,7 @@ static EVP_PKEY *read_private_key(const char *private_key_name, X509 **cert)
 	*cert = NULL;
 
 	if (!strncmp(private_key_name, "pkcs11:", 7)) {
+#ifndef OPENSSL_NO_ENGINE
 		ENGINE *e;
 		struct {
 			const char *url;
@@ -177,6 +181,10 @@ static EVP_PKEY *read_private_key(const char *private_key_name, X509 **cert)
 		}
 		*cert = parms.cert;
 		fprintf(stderr, "Using cert %p\n", *cert);
+#else
+		ssl_err_msg("PKCS#11 ENGINE support not available.");
+		return NULL;
+#endif
 	} else {
 		BIO *b;
 
-- 
2.55.0