From 01710012952e4839393c5ed1e6b4a04692d0af02 Mon Sep 17 00:00:00 2001
From: Vsevolod Stakhov <vsevolod@highsecure.ru>
Date: Wed, 27 Jan 2016 17:37:30 +0000
Subject: [PATCH] Add base32 decode/encode routines to lua util

---
 src/lua/lua_util.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)

diff --git a/src/lua/lua_util.c b/src/lua/lua_util.c
index cbd54e6cf..15bb90180 100644
--- a/src/lua/lua_util.c
+++ b/src/lua/lua_util.c
@@ -70,6 +70,22 @@ LUA_FUNCTION_DEF (util, encode_base64);
  * @return {rspamd_text} decoded data chunk
  */
 LUA_FUNCTION_DEF (util, decode_base64);
+
+/***
+ * @function util.encode_base32(input)
+ * Encodes data in base32 breaking lines if needed
+ * @param {text or string} input input data
+ * @return {rspamd_text} encoded data chunk
+ */
+LUA_FUNCTION_DEF (util, encode_base32);
+/***
+ * @function util.decode_base32(input)
+ * Decodes data from base32 ignoring whitespace characters
+ * @param {text or string} input data to decode
+ * @return {rspamd_text} decoded data chunk
+ */
+LUA_FUNCTION_DEF (util, decode_base32);
+
 /***
  * @function util.tokenize_text(input[, exceptions])
  * Create tokens from a text using optional exceptions list
@@ -183,6 +199,8 @@ static const struct luaL_reg utillib_f[] = {
 	LUA_INTERFACE_DEF (util, process_message),
 	LUA_INTERFACE_DEF (util, encode_base64),
 	LUA_INTERFACE_DEF (util, decode_base64),
+	LUA_INTERFACE_DEF (util, encode_base32),
+	LUA_INTERFACE_DEF (util, decode_base32),
 	LUA_INTERFACE_DEF (util, tokenize_text),
 	LUA_INTERFACE_DEF (util, tanh),
 	LUA_INTERFACE_DEF (util, parse_html),
@@ -441,6 +459,82 @@ lua_util_decode_base64 (lua_State *L)
 	return 1;
 }
 
+static gint
+lua_util_encode_base32 (lua_State *L)
+{
+	struct rspamd_lua_text *t;
+	const gchar *s = NULL;
+	gchar *out;
+	gsize inlen, outlen;
+
+	if (lua_type (L, 1) == LUA_TSTRING) {
+		s = luaL_checklstring (L, 1, &inlen);
+	}
+	else if (lua_type (L, 1) == LUA_TUSERDATA) {
+		t = lua_check_text (L, 1);
+
+		if (t != NULL) {
+			s = t->start;
+			inlen = t->len;
+		}
+	}
+
+	if (s == NULL) {
+		lua_pushnil (L);
+	}
+	else {
+		out = rspamd_encode_base32 (s, inlen);
+
+		if (out != NULL) {
+			t = lua_newuserdata (L, sizeof (*t));
+			outlen = strlen (out);
+			rspamd_lua_setclass (L, "rspamd{text}", -1);
+			t->start = out;
+			t->len = outlen;
+			/* Need destruction */
+			t->own = TRUE;
+		}
+		else {
+			lua_pushnil (L);
+		}
+	}
+
+	return 1;
+}
+
+static gint
+lua_util_decode_base32 (lua_State *L)
+{
+	struct rspamd_lua_text *t;
+	const gchar *s = NULL;
+	gsize inlen, outlen;
+
+	if (lua_type (L, 1) == LUA_TSTRING) {
+		s = luaL_checklstring (L, 1, &inlen);
+	}
+	else if (lua_type (L, 1) == LUA_TUSERDATA) {
+		t = lua_check_text (L, 1);
+
+		if (t != NULL) {
+			s = t->start;
+			inlen = t->len;
+		}
+	}
+
+	if (s != NULL) {
+			t = lua_newuserdata (L, sizeof (*t));
+			rspamd_lua_setclass (L, "rspamd{text}", -1);
+			t->start = rspamd_decode_base32 (s, inlen, &outlen);
+			t->len = outlen;
+			t->own = TRUE;
+	}
+	else {
+		lua_pushnil (L);
+	}
+
+	return 1;
+}
+
 static gint
 lua_util_tokenize_text (lua_State *L)
 {
-- 
2.39.5