[Minor] Allow to read passphrase from Lua

diff --git a/src/lua/lua_util.c b/src/lua/lua_util.c
index 6ca9f35abed37def6cd21efa7d735050f2d585e0..c6c33903358b1df889dca9ad7f20da68cc063cb0 100644 (file)
--- a/src/lua/lua_util.c
+++ b/src/lua/lua_util.c
@@ -378,10 +378,17 @@ LUA_FUNCTION_DEF (util, is_valid_utf8);
 /***
  * @function util.readline([prompt])
  * Returns string read from stdin with history and editing support
- * @return {boolean} true if a string is spoofed
+ * @return {string} string read from the input (with line endings stripped)
  */
 LUA_FUNCTION_DEF (util, readline);
 
+/***
+ * @function util.readpassphrase([prompt])
+ * Returns string read from stdin disabling echo
+ * @return {string} string read from the input (with line endings stripped)
+ */
+LUA_FUNCTION_DEF (util, readpassphrase);
+
 /***
  * @function util.file_exists(file)
  * Checks if a specified file exists and is available for reading
@@ -533,6 +540,7 @@ static const struct luaL_reg utillib_f[] = {
        LUA_INTERFACE_DEF (util, is_utf_spoofed),
        LUA_INTERFACE_DEF (util, is_valid_utf8),
        LUA_INTERFACE_DEF (util, readline),
+       LUA_INTERFACE_DEF (util, readpassphrase),
        LUA_INTERFACE_DEF (util, file_exists),
        LUA_INTERFACE_DEF (util, get_hostname),
        LUA_INTERFACE_DEF (util, pack),
@@ -2093,6 +2101,32 @@ lua_util_readline (lua_State *L)
        return 1;
 }
 
+static gint
+lua_util_readpassphrase (lua_State *L)
+{
+       const gchar *prompt = NULL;
+       gchar test_password[8192];
+       gsize r;
+
+       if (lua_type (L, 1) == LUA_TSTRING) {
+               prompt = lua_tostring (L, 1);
+       }
+
+       r = rspamd_read_passphrase (test_password, sizeof (test_password), 0, NULL);
+
+       if (r > 0) {
+               lua_pushlstring (L, test_password, r);
+       }
+       else {
+               lua_pushnil (L);
+       }
+
+       /* In fact, we still pass it to Lua which is not very safe */
+       rspamd_explicit_memzero (test_password, sizeof (test_password));
+
+       return 1;
+}
+
 static gint
 lua_util_file_exists (lua_State *L)
 {