From 1b134ec2f725f521d65812cdf84ef665287b48a9 Mon Sep 17 00:00:00 2001
From: Evan Phoenix <evan@phx.io>
Date: Thu, 14 Sep 2023 10:59:01 -0700
Subject: [PATCH 1/2] Support ruby 2.3

This restores support for much older versions of ruby such as 2.3. While
these versions are EOL'd, they do still appear in usage in things like
embedded chef. It's not a big change to restore functionality, so we've
done that.
---
 lib/vault/client.rb     | 10 ++++++++--
 lib/vault/persistent.rb | 10 +++++++++-
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/lib/vault/client.rb b/lib/vault/client.rb
index f474db7f..cc82f407 100644
--- a/lib/vault/client.rb
+++ b/lib/vault/client.rb
@@ -64,6 +64,13 @@ class Client
       a << PersistentHTTP::Error
     end.freeze
 
+    # Vault requires at least TLS1.2
+    MIN_TLS_VERSION = if defined? OpenSSL::SSL::TLS1_2_VERSION
+                        OpenSSL::SSL::TLS1_2_VERSION
+                      else
+                        "TLSv1_2"
+                      end
+
     include Vault::Configurable
 
     # Create a new Client with the given options. Any options given take
@@ -112,8 +119,7 @@ def pool
 
         @nhp.verify_mode = OpenSSL::SSL::VERIFY_PEER
 
-        # Vault requires at least TLS1.2
-        @nhp.min_version = OpenSSL::SSL::TLS1_2_VERSION
+        @nhp.min_version = MIN_TLS_VERSION
 
         # Only use secure ciphers
         @nhp.ciphers = ssl_ciphers
diff --git a/lib/vault/persistent.rb b/lib/vault/persistent.rb
index 3611d945..255f5ef6 100644
--- a/lib/vault/persistent.rb
+++ b/lib/vault/persistent.rb
@@ -1043,7 +1043,15 @@ def ssl connection
     connection.use_ssl = true
 
     connection.ciphers     = @ciphers     if @ciphers
-    connection.min_version = @min_version if @min_version
+
+    if @min_version
+      if connection.respond_to? :min_version=
+        connection.min_version = @min_version
+      else
+        connection.ssl_version = @min_version
+      end
+    end
+
     connection.ssl_timeout = @ssl_timeout if @ssl_timeout
 
     connection.verify_depth = @verify_depth

From 3428803df82ef2bf72e8838bd2e45ef3b502d141 Mon Sep 17 00:00:00 2001
From: Matthew Sanabria <24284972+sudomateo@users.noreply.github.com>
Date: Thu, 14 Sep 2023 14:09:21 -0400
Subject: [PATCH 2/2] Update changelog and version number

---
 CHANGELOG.md         | 7 +++++++
 lib/vault/version.rb | 2 +-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d749b577..af380fed 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 ## v?.??.? (Unreleased)
 
+## v0.18.1 (September 14, 2023)
+
+BUG FIXES
+
+- Restored the ability to use this gem with older Ruby versions that do not have
+  the `OpenSSL::SSL::TLS1_2_VERSION` constant.
+
 ## v0.18.0 (September 14, 2023)
 
 IMPROVEMENTS
diff --git a/lib/vault/version.rb b/lib/vault/version.rb
index 11928b47..bafadb0f 100644
--- a/lib/vault/version.rb
+++ b/lib/vault/version.rb
@@ -2,5 +2,5 @@
 # SPDX-License-Identifier: MPL-2.0
 
 module Vault
-  VERSION = "0.18.0"
+  VERSION = "0.18.1"
 end