1 files changed, 60 insertions, 0 deletions
diff --git a/frozen_deps/ecdsa/_compat.py b/frozen_deps/ecdsa/_compat.py
new file mode 100644
index 0000000..720360b
--- /dev/null
+++ b/frozen_deps/ecdsa/_compat.py
@@ -0,0 +1,60 @@
+"""
+Common functions for providing cross-python version compatibility.
+"""
+import sys
+import re
+from six import integer_types
+
+
+def str_idx_as_int(string, index):
+    """Take index'th byte from string, return as integer"""
+    val = string[index]
+    if isinstance(val, integer_types):
+        return val
+    return ord(val)
+
+
+if sys.version_info < (3, 0):
+
+    def normalise_bytes(buffer_object):
+        """Cast the input into array of bytes."""
+        # flake8 runs on py3 where `buffer` indeed doesn't exist...
+        return buffer(buffer_object)  # noqa: F821
+
+    def hmac_compat(ret):
+        return ret
+
+    if sys.version_info < (2, 7) or sys.version_info < (2, 7, 4):
+
+        def remove_whitespace(text):
+            """Removes all whitespace from passed in string"""
+            return re.sub(r"\s+", "", text)
+
+    else:
+
+        def remove_whitespace(text):
+            """Removes all whitespace from passed in string"""
+            return re.sub(r"\s+", "", text, flags=re.UNICODE)
+
+
+else:
+    if sys.version_info < (3, 4):
+        # on python 3.3 hmac.hmac.update() accepts only bytes, on newer
+        # versions it does accept memoryview() also
+        def hmac_compat(data):
+            if not isinstance(data, bytes):
+                return bytes(data)
+            return data
+
+    else:
+
+        def hmac_compat(data):
+            return data
+
+    def normalise_bytes(buffer_object):
+        """Cast the input into array of bytes."""
+        return memoryview(buffer_object).cast("B")
+
+    def remove_whitespace(text):
+        """Removes all whitespace from passed in string"""
+        return re.sub(r"\s+", "", text, flags=re.UNICODE)