ITS#10039 Test for SSL_CTX_set_ciphersuites()

When configuring OpenLDAP using --with-tls=openssl with LibreSSL the
configure will fail to detect SSL_export_keyring_material_early() since
LibreSSL doesn't support this function yet. However OpenLDAP doesn't
actually use this function and only checks for it to ensure a modern
OpenSSL API is used. This can be easily solved by checking for an
equivalent modern OpenSSL function which both LibreSSL and OpenSSL both
support such as SSL_CTX_set_ciphersuites(). Doing this allows the build
and tests to succeed with modern LibreSSL versions. This was tested with
LibreSSL >= 3.6.

Bug: https://bugs.openldap.org/show_bug.cgi?id=10039

diff --git a/configure.ac b/configure.ac
index 83ef5280475a7529b44a783ec58790269a6214e2..8e71453eecd6102e9bc5834a05f7fb7aca29c99f 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1236,7 +1236,7 @@ if test $ol_with_tls = openssl || test $ol_with_tls = auto ; then
 [#endif]])],
                                        , [AC_MSG_FAILURE([OpenSSL 1.1.1 or newer required])])
 
-               AC_CHECK_LIB(ssl, SSL_export_keying_material_early,
+               AC_CHECK_LIB(ssl, SSL_CTX_set_ciphersuites,
                        [have_openssl=yes], [have_openssl=no],
                        [-lcrypto])