From eb4f558b569456570160a6ac7dc6c09774d78989 Mon Sep 17 00:00:00 2001
From: Jeff Becker <jeff@i2p.rocks>
Date: Mon, 24 Aug 2020 10:03:16 -0400
Subject: [PATCH] add b32z encode and bt decode for exit auth

---
 examples/exit_auth.py | 64 +++++++++++++++++++++++++++++++++++++++++++
 pylokimq/bencode.cpp  | 15 +++++-----
 2 files changed, 71 insertions(+), 8 deletions(-)

diff --git a/examples/exit_auth.py b/examples/exit_auth.py
index 7485701..905515c 100644
--- a/examples/exit_auth.py
+++ b/examples/exit_auth.py
@@ -1,10 +1,74 @@
 import pylokimq
+import base64
 import subprocess
 import shlex
 import argparse
+import io
 import time
 
+def decode_str(data):
+    s = ''
+    l = ''
+    while True:
+        ch = data.read(1)
+        if ch == b':':
+            return data.read(int(l))
+        else:
+            l += chr(ch)
+
+def decode_list(data):
+    l = []
+    ch = data.read(1)
+    assert ch == b'l'
+    while True:
+        ch = data.peek(1)
+        if ch == b'e':
+            data.read(1)
+            return l
+        l += decode_value(data)
+
+def decode_dict(data):
+    d = dict()
+    ch = data.read(1)
+    assert ch == b'd'
+    while True:
+        ch = data.peek(1)
+        if ch == b'e':
+            data.read(1)
+            return d
+        k = decode_str(data)
+        v = decode_value(data)
+        d[k] = v
+
+def decode_int(data):
+    ch = data.read(1)
+    i = ''
+    assert ch == b'i'
+    while True:
+        ch = data.read(1)
+        if ch == b'e':
+            return int(i)
+        i += chr(ch)
+
+def decode_value(data):
+    ch = data.peek(1)
+    if ch in b'0123456789':
+        return decode_string(data)
+    if ch == b'i':
+        return decode_int(data)
+    if ch == b'd':
+        return decode_dict(data)
+    if ch == b'l':
+        return decode_list(data)
+    raise Exception("invalid char: {}".format(ch))
+
+
+def decode_address(data):
+    return '{}.loki'.format(pylokimq.base32z_encode(decode_dict(data)[b's'][b's']))
+
 def handle_auth(args, cmd):
+    cmd += decode_address(io.BytesIO(args[0]))
+    cmd += base64.b64encode(args[1]).decode('ascii')
     result = subprocess.run(args=cmd, check=False)
     if result.returncode == 0:
         return "OK"
diff --git a/pylokimq/bencode.cpp b/pylokimq/bencode.cpp
index 90fbea4..d039508 100644
--- a/pylokimq/bencode.cpp
+++ b/pylokimq/bencode.cpp
@@ -1,17 +1,16 @@
 #include "common.hpp"
-#include "lokimq/bt_serialize.h"
+#include "lokimq/base32z.h"
 
 namespace lokimq
 {
   void
   BEncode_Init(py::module & mod)
   {
-   auto submod = mod.def_submodule("bencode");
-    submod.def("decode", [](py::bytes data) {
-                           char * ptr;
-                           Py_ssize_t len;
-                           PyBytes_AsStringAndSize(data.ptr(), &ptr, &len);
-                           return bt_get(std::string_view(ptr, len));
-    });
+    mod.def("base32z_encode", [](py::bytes data) {
+                                char * ptr = nullptr;
+                                py::ssize_t sz = 0;
+                                PyBytes_AsStringAndSize(data.ptr(), &ptr, &sz);
+                                return lokimq::to_base32z(ptr, ptr+sz);
+                              });
   }
 }