调整base64正则避免匹配太多无用结果

Author: qux-bbb

xanalyzer/file.py

@@ -225,7 +225,7 @@ def get_special_strs(self):
         the_file = open(self.file_path, "rb")
         file_content = the_file.read()
         the_file.close()
-        tmp_base64_strs = re.findall(rb"[A-Za-z0-9+/]{2,}={0,2}", file_content)
+        tmp_base64_strs = re.findall(rb"[A-Za-z0-9+/]{6,}={1,2}", file_content)
         possible_base64_strs = []
         for tmp_base64_str in tmp_base64_strs:
             # 过滤hex字符串
@@ -240,7 +240,10 @@ def get_special_wide_strs(self):
         the_file = open(self.file_path, "rb")
         file_content = the_file.read()
         the_file.close()
-        tmp_base64_strs = re.findall(rb"(?:[A-Za-z0-9+/]\x00){2,}(?:=\x00){0,2}", file_content)
+        tmp_base64_strs = re.findall(
+            rb"(?:[A-Za-z0-9+/]\x00){6,}(?:=\x00){1,2}",
+            file_content,
+        )
         possible_base64_strs = []
         for tmp_base64_str in tmp_base64_strs:
             # 过滤hex字符串