1 files changed, 10 insertions, 7 deletions
diff --git a/security-utils/src/main/java/com/yahoo/security/tls/TlsContext.java b/security-utils/src/main/java/com/yahoo/security/tls/TlsContext.java
index 9d72030c624..8e146f36907 100644
--- a/security-utils/src/main/java/com/yahoo/security/tls/TlsContext.java
+++ b/security-utils/src/main/java/com/yahoo/security/tls/TlsContext.java
@@ -7,6 +7,8 @@ import javax.net.ssl.SSLParameters;
 import java.security.KeyManagementException;
 import java.security.NoSuchAlgorithmException;
 import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashSet;
 import java.util.Set;
 
 import static java.util.stream.Collectors.toSet;
@@ -24,20 +26,21 @@ public interface TlsContext extends AutoCloseable {
      * For TLSv1.2 we only allow RSA and ECDSA with ephemeral key exchange and GCM.
      * For TLSv1.3 we allow the DEFAULT group ciphers.
      * Note that we _only_ allow AEAD ciphers for either TLS version.
+     *
+     * TODO(bjorncs) Add new ciphers once migrated to JDK-17 (also available in 11.0.13):
+     * - TLS_CHACHA20_POLY1305_SHA256, TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
      */
-    Set<String> ALLOWED_CIPHER_SUITES = Set.of(
+    Set<String> ALLOWED_CIPHER_SUITES = Collections.unmodifiableSet(new HashSet<>(Arrays.asList(
             "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384",
             "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
             "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256",
             "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
             "TLS_AES_128_GCM_SHA256", // TLSv1.3
-            "TLS_AES_256_GCM_SHA384", // TLSv1.3
-            "TLS_CHACHA20_POLY1305_SHA256", // TLSv1.3
-            "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256",
-            "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256"
-            );
+            "TLS_AES_256_GCM_SHA384" // TLSv1.3
+            )));
 
-    Set<String> ALLOWED_PROTOCOLS = Set.of("TLSv1.2", "TLSv1.3");
+    // TODO Enable TLSv1.3 after upgrading to JDK 17
+    Set<String> ALLOWED_PROTOCOLS = Collections.singleton("TLSv1.2");
 
     /** 
      * {@link SSLContext} protocol name that supports at least oldest protocol listed in {@link #ALLOWED_PROTOCOLS}