Stunnel cannot use an encrypted private key being built against OpenSSL 3.0

Resolves: rhbz#1976854

stunnel-5.58-openssl30.patch

@@ -0,0 +1,19 @@
+diff -up stunnel-5.58/src/ctx.c.openssl30 stunnel-5.58/src/ctx.c
+--- stunnel-5.58/src/ctx.c.openssl30	2021-07-28 11:12:05.743832246 +0200
++++ stunnel-5.58/src/ctx.c	2021-07-28 11:18:19.318021120 +0200
+@@ -1015,6 +1015,15 @@ NOEXPORT int ui_retry() {
+         default:
+             return 0;
+         }
++#ifdef ERR_LIB_OSSL_DECODER
++    case ERR_LIB_OSSL_DECODER:
++        switch(ERR_GET_REASON(err)) {
++        case ERR_R_UNSUPPORTED:
++            return 1;
++        default:
++            return 0;
++        }
++#endif
+     case ERR_LIB_USER: /* PKCS#11 hacks */
+         switch(ERR_GET_REASON(err)) {
+         case 7UL: /* CKR_ARGUMENTS_BAD */

stunnel.spec

@@ -10,7 +10,7 @@
 Summary: A TLS-encrypting socket wrapper
 Name: stunnel
 Version: 5.58
-Release: 3%{?dist}
+Release: 4%{?dist}
 License: GPLv2
 URL: http://www.stunnel.org/
 Source0: https://www.stunnel.org/downloads/stunnel-%{version}.tar.gz
@@ -27,6 +27,7 @@ Patch3: stunnel-5.56-system-ciphers.patch
 Patch4: stunnel-5.56-coverity.patch
 Patch5: stunnel-5.56-default-tls-version.patch
 Patch6: stunnel-5.56-curves-doc-update.patch
+Patch7: stunnel-5.58-openssl30.patch
 # util-linux is needed for rename
 BuildRequires: make
 BuildRequires: gcc
@@ -56,6 +57,7 @@ conjunction with imapd to create a TLS secure IMAP server.
 %patch4 -p1 -b .coverity
 %patch5 -p1 -b .default-tls-version
 %patch6 -p1 -b .curves-doc-update
+%patch7 -p1 -b .openssl30
 
 # Fix the configure script output for FIPS mode and stack protector flag
 sed -i '/yes).*result: no/,+1{s/result: no/result: yes/;s/as_echo "no"/as_echo "yes"/};s/-fstack-protector/-fstack-protector-strong/' configure
@@ -141,6 +143,10 @@ make test || (for i in tests/logs/*.log ; do echo "$i": ; cat "$i" ; done)
 %systemd_postun_with_restart %{name}.service
 
 %changelog
+* Wed Jul 28 2021 Dmitry Belyavskiy <dbelyavs@redhat.com> - 5.58-4
+- Stunnel cannot use an encrypted private key being built against OpenSSL 3.0
+- Resolves: rhbz#1976854
+
 * Wed Jun 16 2021 Mohan Boddu <mboddu@redhat.com> - 5.58-3
 - Rebuilt for RHEL 9 BETA for openssl 3.0
   Related: rhbz#1971065