PYTHON-4468 Hide the value of sensitive subtype binary objects (#1649)

Co-authored-by: Steven Silvester <steven.silvester@ieee.org>

Author: TerryRPatterson

bson/binary.py

@@ -364,4 +364,7 @@ def __ne__(self, other: Any) -> bool:
         return not self == other
 
     def __repr__(self) -> str:
-        return f"Binary({bytes.__repr__(self)}, {self.__subtype})"
+        if self.__subtype == SENSITIVE_SUBTYPE:
+            return f"<Binary(REDACTED, {self.__subtype})>"
+        else:
+            return f"Binary({bytes.__repr__(self)}, {self.__subtype})"

doc/changelog.rst

@@ -6,6 +6,8 @@ Changes in Version 4.8.0
 
 The handshake metadata for "os.name" on Windows has been simplified to "Windows" to improve import time.
 
+The repr of ``bson.binary.Binary`` is now redacted when the subtype is SENSITIVE_SUBTYPE(8).
+
 .. warning:: PyMongo 4.8 drops support for Python 3.7 and PyPy 3.8: Python 3.8+ or PyPy 3.9+ is now required.
 
 Changes in Version 4.7.3

doc/contributors.rst

@@ -100,3 +100,4 @@ The following is a list of people who have contributed to
 - Stephan Hof (stephan-hof)
 - Casey Clements (caseyclements)
 - Ivan Lukyanchikov (ilukyanchikov)
+- Terry Patterson