Implement SHA-2 512bit HMAC support from #581

1 files changed, 3 insertions, 1 deletions

diff --git a/paramiko/transport.py b/paramiko/transport.py
index 5f170ffd..b8ad8424 100644
--- a/paramiko/transport.py
+++ b/paramiko/transport.py
@@ -26,7 +26,7 @@ import sys
 import threading
 import time
 import weakref
-from hashlib import md5, sha1, sha256
+from hashlib import md5, sha1, sha256, sha512
 
 import paramiko
 from paramiko import util
@@ -108,6 +108,7 @@ class Transport (threading.Thread, ClosingContextManager):
     )
     _preferred_macs = (
         'hmac-sha2-256',
+        'hmac-sha2-512',
         'hmac-md5',
         'hmac-sha1-96',
         'hmac-md5-96',
@@ -181,6 +182,7 @@ class Transport (threading.Thread, ClosingContextManager):
         'hmac-sha1': {'class': sha1, 'size': 20},
         'hmac-sha1-96': {'class': sha1, 'size': 12},
         'hmac-sha2-256': {'class': sha256, 'size': 32},
+        'hmac-sha2-512': {'class': sha512, 'size': 64},
         'hmac-md5': {'class': md5, 'size': 16},
         'hmac-md5-96': {'class': md5, 'size': 12},
     }