Add standalone crypt.py script to encrypt/decrypt msg

lib/crypt.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+
+import base64, base58, sys, string, random
+from natools import get_privkey, box_decrypt, box_encrypt, fmt
+
+def getargv(arg:str, default:str="", n:int=1, args:list=sys.argv) -> str:
+	if arg in args and len(args) > args.index(arg)+n:
+		return args[args.index(arg)+n]
+	else:
+		return default
+
+cmd = sys.argv[1]
+
+dunikey = getargv("-k", "private.dunikey")
+msg = getargv("-m", "test")
+pubkey = getargv("-p")
+
+def decrypt(msg):
+    msg64 = base64.b64decode(msg)
+    return box_decrypt(msg64, get_privkey(dunikey, "pubsec"), pubkey).decode()
+
+def encrypt(msg):
+    return fmt["64"](box_encrypt(msg.encode(), get_privkey(dunikey, "pubsec"), pubkey)).decode()
+
+if cmd == 'decrypt':
+    clear = decrypt(msg)
+    print(clear)
+elif cmd == 'encrypt':
+    clear = encrypt(msg)
+    print(clear)
+