Intermediate changes

1 files changed, 68 insertions, 0 deletions

diff --git a/contrib/python/PyJWT/py2/jwt/compat.py b/contrib/python/PyJWT/py2/jwt/compat.py
new file mode 100644
index 00000000000..e79e258e56d
--- /dev/null
+++ b/contrib/python/PyJWT/py2/jwt/compat.py
@@ -0,0 +1,68 @@
+"""
+The `compat` module provides support for backwards compatibility with older
+versions of python, and compatibility wrappers around optional packages.
+"""
+# flake8: noqa
+import hmac
+import struct
+import sys
+
+
+PY3 = sys.version_info[0] == 3
+
+
+if PY3:
+    text_type = str
+    binary_type = bytes
+else:
+    text_type = unicode
+    binary_type = str
+
+string_types = (text_type, binary_type)
+
+try:
+    # Importing ABCs from collections will be removed in PY3.8
+    from collections.abc import Iterable, Mapping
+except ImportError:
+    from collections import Iterable, Mapping
+
+try:
+    constant_time_compare = hmac.compare_digest
+except AttributeError:
+    # Fallback for Python < 2.7
+    def constant_time_compare(val1, val2):
+        """
+        Returns True if the two strings are equal, False otherwise.
+
+        The time taken is independent of the number of characters that match.
+        """
+        if len(val1) != len(val2):
+            return False
+
+        result = 0
+
+        for x, y in zip(val1, val2):
+            result |= ord(x) ^ ord(y)
+
+        return result == 0
+
+# Use int.to_bytes if it exists (Python 3)
+if getattr(int, 'to_bytes', None):
+    def bytes_from_int(val):
+        remaining = val
+        byte_length = 0
+
+        while remaining != 0:
+            remaining = remaining >> 8
+            byte_length += 1
+
+        return val.to_bytes(byte_length, 'big', signed=False)
+else:
+    def bytes_from_int(val):
+        buf = []
+        while val:
+            val, remainder = divmod(val, 256)
+            buf.append(remainder)
+
+        buf.reverse()
+        return struct.pack('%sB' % len(buf), *buf)