Port dkimverify.py.

dkimverify.py

@@ -3,11 +3,11 @@
 # This software is provided 'as-is', without any express or implied
 # warranty.  In no event will the author be held liable for any damages
 # arising from the use of this software.
-# 
+#
 # Permission is granted to anyone to use this software for any purpose,
 # including commercial applications, and to alter it and redistribute it
 # freely, subject to the following restrictions:
-# 
+#
 # 1. The origin of this software must not be misrepresented; you must not
 #    claim that you wrote the original software. If you use this software
 #    in a product, an acknowledgment in the product documentation would be
@@ -15,15 +15,24 @@
 # 2. Altered source versions must be plainly marked as such, and must not be
 #    misrepresented as being the original software.
 # 3. This notice may not be removed or altered from any source distribution.
-# 
+#
 # Copyright (c) 2008 Greg Hewgill http://hewgill.com
+#
+# This has been modified from the original software.
+# Copyright (c) 2011 William Grant <me@williamgrant.id.au>
+
+from __future__ import print_function
 
 import sys
 
 import dkim
 
+if sys.version_info.major >= 3:
+    # Make sys.stdin a binary stream.
+    sys.stdin = sys.stdin.detach()
+
 message = sys.stdin.read()
 if not dkim.verify(message):
-    print "signature verification failed"
+    print("signature verification failed")
     sys.exit(1)
-print "signature ok"
+print("signature ok")