filters: migrate from luacrypto to luaossl

luaossl has no upstream anymore and doesn't support OpenSSL 1.1,
whereas luaossl is quite active.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

1 files changed, 13 insertions, 4 deletions

@@ -3,15 +3,24 @@
 -- prefix in filters. It is much faster than the corresponding python script.
 --
 -- Requirements:
---      luacrypto >= 0.3
---      <http://mkottman.github.io/luacrypto/>
+--      luaossl
+--      <http://25thandclement.com/~william/projects/luaossl.html>
 --
 
-local crypto = require("crypto")
+local digest = require("openssl.digest")
+
+function md5_hex(input)
+        local b = digest.new("md5"):final(input)
+        local x = ""
+        for i = 1, #b do
+                x = x .. string.format("%.2x", string.byte(b, i))
+        end
+        return x
+end
 
 function filter_open(email, page)
         buffer = ""
-        md5 = crypto.digest("md5", email:sub(2, -2):lower())
+        md5 = md5_hex(email:sub(2, -2):lower())
 end
 
 function filter_close()