commit 60b50f918198cfb7b040bb125676176b991bc5b6
author Thomas Wolf <twolf@apache.org> Wed Apr 14 17:58:20 2021 +0200
committer Thomas Wolf <twolf@apache.org> Wed Apr 14 20:41:19 2021 +0200
tree d66f098c57b69123bac2929ef1c8baf14d1d688a
parent 797d887d1ec4db4c5d7722acf61bbc57f6652eab

[SSHD-1141] DefaultClientKexExtensionHandler: ensure list is modifiable

sshd-core/src/main/java/org/apache/sshd/common/kex/extension/DefaultClientKexExtensionHandler.java

diff --git a/sshd-core/src/main/java/org/apache/sshd/common/kex/extension/DefaultClientKexExtensionHandler.java b/sshd-core/src/main/java/org/apache/sshd/common/kex/extension/DefaultClientKexExtensionHandler.java
index 19a0324..a22996b 100644
--- a/sshd-core/src/main/java/org/apache/sshd/common/kex/extension/DefaultClientKexExtensionHandler.java
+++ b/sshd-core/src/main/java/org/apache/sshd/common/kex/extension/DefaultClientKexExtensionHandler.java
@@ -129,7 +129,7 @@
         // Client determines order; server says what it supports. Re-order such that supported ones are
         // at the front, in client order, followed by unsupported ones, also in client order.
         if (serverAlgorithms != null && !serverAlgorithms.isEmpty()) {
-            List<NamedFactory<Signature>> clientAlgorithms = session.getSignatureFactories();
+            List<NamedFactory<Signature>> clientAlgorithms = new ArrayList<>(session.getSignatureFactories());
             if (log.isDebugEnabled()) {
                 log.debug("handleServerSignatureAlgorithms({}): PubkeyAcceptedAlgorithms before: {}", //$NON-NLS-1$
                         session, clientAlgorithms);