Implement AES-GCM in tlslite.

third_party/tlslite/tlslite/utils/pycrypto_aesgcm.py

Index: third_party/tlslite/tlslite/utils/pycrypto_aesgcm.py
diff --git a/third_party/tlslite/tlslite/utils/pycrypto_aesgcm.py b/third_party/tlslite/tlslite/utils/pycrypto_aesgcm.py
new file mode 100644
index 0000000000000000000000000000000000000000..ee187eea7be97733da0583508e5289b1698bed73
--- /dev/null
+++ b/third_party/tlslite/tlslite/utils/pycrypto_aesgcm.py
@@ -0,0 +1,16 @@
+# Author: Google
+# See the LICENSE file for legal information regarding use of this file.
+
+"""PyCrypto AES-GCM implementation."""
+
+from .cryptomath import *
+from .aesgcm import AESGCM
+
+if pycryptoLoaded:
+    import Crypto.Cipher.AES
+
+    def new(key):
+        cipher = Crypto.Cipher.AES.new(bytes(key))
+        def encrypt(plaintext):
+            return bytearray(cipher.encrypt(bytes(plaintext)))
+        return AESGCM(key, "pycrypto", encrypt)