1 files changed, 12 insertions, 0 deletions
diff --git a/paramiko/util.py b/paramiko/util.py
index ab1bb98d..3ac64a00 100644
--- a/paramiko/util.py
+++ b/paramiko/util.py
@@ -321,3 +321,15 @@ def constant_time_bytes_eq(a, b):
     for i in (xrange if PY2 else range)(len(a)):
         res |= byte_ord(a[i]) ^ byte_ord(b[i])
     return res == 0
+
+
+class ClosingContextManager(object):
+    def __enter__(self):
+        return self
+
+    def __exit__(self, type, value, traceback):
+        self.close()
+
+
+def clamp_value(minimum, val, maximum):
+    return max(minimum, min(val, maximum))