From 720c34ce8ddacb0c1ac82d32ae4ebc3e82c25c27 Mon Sep 17 00:00:00 2001
From: Nathaniel Wesley Filardo <nwf@cs.jhu.edu>
Date: Fri, 4 Aug 2017 16:04:24 -0400
Subject: [PATCH] add telnetd-file sha256 subcommand

---
 telnetd/telnetd-file.lua | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/telnetd/telnetd-file.lua b/telnetd/telnetd-file.lua
index 9841e70..4578d6b 100644
--- a/telnetd/telnetd-file.lua
+++ b/telnetd/telnetd-file.lua
@@ -12,6 +12,10 @@ return {
 , ["compile"] = function(ll,s) local fn = string.match(ll,"^%s*([^%s]+)%s*$");
     local r,err = pcall(node.compile,fn); if not r then s("ERR: "..err) end
   end
+, ["sha256"] = function(ll,s) -- compute the hash of a file in flash
+    local fn = string.match(ll,"^%s*([^%s]+)%s*$")
+    s(crypto.toBase64(crypto.fhash('sha256',fn)))
+  end
 , ["pread"] = function(ll,s) -- read b64 data from off in fn
     local len, off, fn = string.match(ll,"^%s*(%d+)%s+(%d+)%s+([^%s]+)%s*$")
     if fn == nil then s("ERR: Need file"); return end
-- 
2.50.1