Don't compare or merge str with unicode

Fixes #13387

lib/ansible/module_utils/basic.py

@@ -369,7 +369,12 @@ def return_values(obj):
     sensitive values pre-jsonification."""
     if isinstance(obj, basestring):
         if obj:
+            if isinstance(obj, bytes):
                 yield obj
+            else:
+                # Unicode objects should all convert to utf-8
+                # (still must deal with surrogateescape on python3)
+                yield obj.encode('utf-8')
         return
     elif isinstance(obj, Sequence):
         for element in obj:
@@ -391,10 +396,22 @@ def remove_values(value, no_log_strings):
     """ Remove strings in no_log_strings from value.  If value is a container
     type, then remove a lot more"""
     if isinstance(value, basestring):
-        if value in no_log_strings:
+        if isinstance(value, unicode):
+            # This should work everywhere on python2. Need to check
+            # surrogateescape on python3
+            bytes_value = value.encode('utf-8')
+            value_is_unicode = True
+        else:
+            bytes_value = value
+            value_is_unicode = False
+        if bytes_value in no_log_strings:
             return 'VALUE_SPECIFIED_IN_NO_LOG_PARAMETER'
         for omit_me in no_log_strings:
-            value = value.replace(omit_me, '*' * 8)
+            bytes_value = bytes_value.replace(omit_me, '*' * 8)
+        if value_is_unicode:
+            value = unicode(bytes_value, 'utf-8', errors='replace')
+        else:
+            value = bytes_value
     elif isinstance(value, Sequence):
         return [remove_values(elem, no_log_strings) for elem in value]
     elif isinstance(value, Mapping):