Support TLSv1.1 and TLSv1.2 for the cluster transport encryption

From https://wiki.openssl.org/index.php/SSL/TLS_Client:
SSLv23_method specifies the protocols used and behavior of the handshake.
The method essentially means SSLv2 or above, and includes the TLS protocols.
The protocols are further tuned through SSL/TLS options. By using
SSLv23_method (and removing the SSL protocols with SSL_OP_NO_SSLv2 and
SSL_OP_NO_SSLv3), then you will use TLS v1.0 and above, including TLS v1.2.
You will also use a TLS handshake in the TLS Record.

If you use TLSv1_method, then you will only use TLS v1.0.

fixes #10988

diff --git a/lib/base/tlsutility.cpp b/lib/base/tlsutility.cpp
index d34e465c960362beacb4f8bc3cef946535bc5b25..e623053bdaf21ad00e78216f3638b2615058847f 100644 (file)
--- a/lib/base/tlsutility.cpp
+++ b/lib/base/tlsutility.cpp
@@ -83,7 +83,9 @@ boost::shared_ptr<SSL_CTX> MakeSSLContext(const String& pubkey, const String& pr
 
        InitializeOpenSSL();
 
-       boost::shared_ptr<SSL_CTX> sslContext = boost::shared_ptr<SSL_CTX>(SSL_CTX_new(TLSv1_method()), SSL_CTX_free);
+       boost::shared_ptr<SSL_CTX> sslContext = boost::shared_ptr<SSL_CTX>(SSL_CTX_new(SSLv23_method()), SSL_CTX_free);
+
+       SSL_CTX_set_options(sslContext.get(), SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_COMPRESSION);
 
        SSL_CTX_set_mode(sslContext.get(), SSL_MODE_ENABLE_PARTIAL_WRITE | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
        SSL_CTX_set_session_id_context(sslContext.get(), (const unsigned char *)"Icinga 2", 8);