From 9aacd736732e503ba5a6f0fe14e385d7a63e5a9f Mon Sep 17 00:00:00 2001
From: Max Goedjen <max.goedjen@gmail.com>
Date: Thu, 23 Dec 2021 22:56:47 -0800
Subject: [PATCH] Fix Zac's crash (#284)

* Guard + copy

* obo
---
 SecretAgentKit/Agent.swift | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/SecretAgentKit/Agent.swift b/SecretAgentKit/Agent.swift
index 3e69037..f2bc226 100644
--- a/SecretAgentKit/Agent.swift
+++ b/SecretAgentKit/Agent.swift
@@ -23,8 +23,8 @@ extension Agent {
 
     public func handle(reader: FileHandleReader, writer: FileHandleWriter) {
         Logger().debug("Agent handling new data")
-        let data = reader.availableData
-        guard !data.isEmpty else { return }
+        let data = Data(reader.availableData)
+        guard data.count > 4 else { return }
         let requestTypeInt = data[4]
         guard let requestType = SSHAgent.RequestType(rawValue: requestTypeInt) else {
             writer.write(OpenSSHKeyWriter().lengthAndData(of: SSHAgent.ResponseType.agentFailure.data))