Added future imports and licenses that are missing

68 files changed, 313 insertions, 0 deletions

diff --git a/cryptography/__init__.py b/cryptography/__init__.py
index f37bd227..599bb059 100644
--- a/cryptography/__init__.py
+++ b/cryptography/__init__.py
@@ -10,6 +10,9 @@
 # implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+from __future__ import absolute_import, division, print_function
+
 from cryptography.__about__ import (
     __title__, __summary__, __uri__, __version__, __author__, __email__,
     __license__, __copyright__
diff --git a/cryptography/exceptions.py b/cryptography/exceptions.py
index a26dbe18..d7c867d6 100644
--- a/cryptography/exceptions.py
+++ b/cryptography/exceptions.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 
 class UnsupportedAlgorithm(Exception):
     pass
diff --git a/cryptography/fernet.py b/cryptography/fernet.py
index 71a9fadf..28d9c928 100644
--- a/cryptography/fernet.py
+++ b/cryptography/fernet.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 import base64
 import binascii
 import os
diff --git a/cryptography/hazmat/__init__.py b/cryptography/hazmat/__init__.py
index 55c925c6..2f420574 100644
--- a/cryptography/hazmat/__init__.py
+++ b/cryptography/hazmat/__init__.py
@@ -10,3 +10,5 @@
 # implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+from __future__ import absolute_import, division, print_function
diff --git a/cryptography/hazmat/backends/__init__.py b/cryptography/hazmat/backends/__init__.py
index 406b37e5..59d1bc6c 100644
--- a/cryptography/hazmat/backends/__init__.py
+++ b/cryptography/hazmat/backends/__init__.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 from cryptography.hazmat.backends import openssl
 from cryptography.hazmat.backends.multibackend import MultiBackend
 from cryptography.hazmat.bindings.commoncrypto.binding import (
diff --git a/cryptography/hazmat/backends/commoncrypto/__init__.py b/cryptography/hazmat/backends/commoncrypto/__init__.py
index 64a1c01c..f080394f 100644
--- a/cryptography/hazmat/backends/commoncrypto/__init__.py
+++ b/cryptography/hazmat/backends/commoncrypto/__init__.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 from cryptography.hazmat.backends.commoncrypto.backend import backend
 
 
diff --git a/cryptography/hazmat/backends/openssl/__init__.py b/cryptography/hazmat/backends/openssl/__init__.py
index a8dfad06..25885e18 100644
--- a/cryptography/hazmat/backends/openssl/__init__.py
+++ b/cryptography/hazmat/backends/openssl/__init__.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 from cryptography.hazmat.backends.openssl.backend import backend
 
 
diff --git a/cryptography/hazmat/bindings/__init__.py b/cryptography/hazmat/bindings/__init__.py
index 55c925c6..2f420574 100644
--- a/cryptography/hazmat/bindings/__init__.py
+++ b/cryptography/hazmat/bindings/__init__.py
@@ -10,3 +10,5 @@
 # implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+from __future__ import absolute_import, division, print_function
diff --git a/cryptography/hazmat/bindings/commoncrypto/__init__.py b/cryptography/hazmat/bindings/commoncrypto/__init__.py
index 55c925c6..2f420574 100644
--- a/cryptography/hazmat/bindings/commoncrypto/__init__.py
+++ b/cryptography/hazmat/bindings/commoncrypto/__init__.py
@@ -10,3 +10,5 @@
 # implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+from __future__ import absolute_import, division, print_function
diff --git a/cryptography/hazmat/bindings/commoncrypto/common_cryptor.py b/cryptography/hazmat/bindings/commoncrypto/common_cryptor.py
index 8f03bc3f..9bd03a7c 100644
--- a/cryptography/hazmat/bindings/commoncrypto/common_cryptor.py
+++ b/cryptography/hazmat/bindings/commoncrypto/common_cryptor.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <CommonCrypto/CommonCryptor.h>
 """
diff --git a/cryptography/hazmat/bindings/commoncrypto/common_digest.py b/cryptography/hazmat/bindings/commoncrypto/common_digest.py
index ec0fcc92..c59200cb 100644
--- a/cryptography/hazmat/bindings/commoncrypto/common_digest.py
+++ b/cryptography/hazmat/bindings/commoncrypto/common_digest.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <CommonCrypto/CommonDigest.h>
 """
diff --git a/cryptography/hazmat/bindings/commoncrypto/common_hmac.py b/cryptography/hazmat/bindings/commoncrypto/common_hmac.py
index a4bf9009..4f54b62b 100644
--- a/cryptography/hazmat/bindings/commoncrypto/common_hmac.py
+++ b/cryptography/hazmat/bindings/commoncrypto/common_hmac.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <CommonCrypto/CommonHMAC.h>
 """
diff --git a/cryptography/hazmat/bindings/commoncrypto/common_key_derivation.py b/cryptography/hazmat/bindings/commoncrypto/common_key_derivation.py
index 85def1e9..e8cc03ef 100644
--- a/cryptography/hazmat/bindings/commoncrypto/common_key_derivation.py
+++ b/cryptography/hazmat/bindings/commoncrypto/common_key_derivation.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <CommonCrypto/CommonKeyDerivation.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/__init__.py b/cryptography/hazmat/bindings/openssl/__init__.py
index 55c925c6..caf20dbd 100644
--- a/cryptography/hazmat/bindings/openssl/__init__.py
+++ b/cryptography/hazmat/bindings/openssl/__init__.py
@@ -10,3 +10,6 @@
 # implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+from __future__ import absolute_import, division, print_function
+
diff --git a/cryptography/hazmat/bindings/openssl/aes.py b/cryptography/hazmat/bindings/openssl/aes.py
index 95ed5271..17c154cf 100644
--- a/cryptography/hazmat/bindings/openssl/aes.py
+++ b/cryptography/hazmat/bindings/openssl/aes.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/aes.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/asn1.py b/cryptography/hazmat/bindings/openssl/asn1.py
index aeaf316e..d908b198 100644
--- a/cryptography/hazmat/bindings/openssl/asn1.py
+++ b/cryptography/hazmat/bindings/openssl/asn1.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/asn1.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/bignum.py b/cryptography/hazmat/bindings/openssl/bignum.py
index e843099e..a40397db 100644
--- a/cryptography/hazmat/bindings/openssl/bignum.py
+++ b/cryptography/hazmat/bindings/openssl/bignum.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/bn.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/bio.py b/cryptography/hazmat/bindings/openssl/bio.py
index 28172689..0c521b4d 100644
--- a/cryptography/hazmat/bindings/openssl/bio.py
+++ b/cryptography/hazmat/bindings/openssl/bio.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/bio.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/conf.py b/cryptography/hazmat/bindings/openssl/conf.py
index 6d818cf1..dda35e86 100644
--- a/cryptography/hazmat/bindings/openssl/conf.py
+++ b/cryptography/hazmat/bindings/openssl/conf.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/conf.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/crypto.py b/cryptography/hazmat/bindings/openssl/crypto.py
index 81d13b73..99e1a61d 100644
--- a/cryptography/hazmat/bindings/openssl/crypto.py
+++ b/cryptography/hazmat/bindings/openssl/crypto.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/crypto.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/dh.py b/cryptography/hazmat/bindings/openssl/dh.py
index ecc62e98..1791a670 100644
--- a/cryptography/hazmat/bindings/openssl/dh.py
+++ b/cryptography/hazmat/bindings/openssl/dh.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/dh.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/dsa.py b/cryptography/hazmat/bindings/openssl/dsa.py
index 664296d3..40d3b8ee 100644
--- a/cryptography/hazmat/bindings/openssl/dsa.py
+++ b/cryptography/hazmat/bindings/openssl/dsa.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/dsa.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/ec.py b/cryptography/hazmat/bindings/openssl/ec.py
index 9d6f7cb9..2617fe2a 100644
--- a/cryptography/hazmat/bindings/openssl/ec.py
+++ b/cryptography/hazmat/bindings/openssl/ec.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #ifndef OPENSSL_NO_EC
 #include <openssl/ec.h>
diff --git a/cryptography/hazmat/bindings/openssl/engine.py b/cryptography/hazmat/bindings/openssl/engine.py
index 77118e81..364232e0 100644
--- a/cryptography/hazmat/bindings/openssl/engine.py
+++ b/cryptography/hazmat/bindings/openssl/engine.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/engine.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/err.py b/cryptography/hazmat/bindings/openssl/err.py
index f21d98b6..806d0ea0 100644
--- a/cryptography/hazmat/bindings/openssl/err.py
+++ b/cryptography/hazmat/bindings/openssl/err.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/err.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/evp.py b/cryptography/hazmat/bindings/openssl/evp.py
index 77128c47..ad4b568e 100644
--- a/cryptography/hazmat/bindings/openssl/evp.py
+++ b/cryptography/hazmat/bindings/openssl/evp.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/evp.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/hmac.py b/cryptography/hazmat/bindings/openssl/hmac.py
index 4b81c9df..6a64b92c 100644
--- a/cryptography/hazmat/bindings/openssl/hmac.py
+++ b/cryptography/hazmat/bindings/openssl/hmac.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/hmac.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/nid.py b/cryptography/hazmat/bindings/openssl/nid.py
index cb83c1ba..ea6fd4d6 100644
--- a/cryptography/hazmat/bindings/openssl/nid.py
+++ b/cryptography/hazmat/bindings/openssl/nid.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = ""
 
 TYPES = """
diff --git a/cryptography/hazmat/bindings/openssl/objects.py b/cryptography/hazmat/bindings/openssl/objects.py
index 0abc42d6..557c0158 100644
--- a/cryptography/hazmat/bindings/openssl/objects.py
+++ b/cryptography/hazmat/bindings/openssl/objects.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/objects.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/opensslv.py b/cryptography/hazmat/bindings/openssl/opensslv.py
index 397f4ca2..e4aa6212 100644
--- a/cryptography/hazmat/bindings/openssl/opensslv.py
+++ b/cryptography/hazmat/bindings/openssl/opensslv.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/opensslv.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/osrandom_engine.py b/cryptography/hazmat/bindings/openssl/osrandom_engine.py
index 0903a4bf..462997cc 100644
--- a/cryptography/hazmat/bindings/openssl/osrandom_engine.py
+++ b/cryptography/hazmat/bindings/openssl/osrandom_engine.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #ifdef _WIN32
 #include <Wincrypt.h>
diff --git a/cryptography/hazmat/bindings/openssl/pem.py b/cryptography/hazmat/bindings/openssl/pem.py
index 942cba34..e42fc6fe 100644
--- a/cryptography/hazmat/bindings/openssl/pem.py
+++ b/cryptography/hazmat/bindings/openssl/pem.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/pem.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/pkcs12.py b/cryptography/hazmat/bindings/openssl/pkcs12.py
index bd01e756..a8f106f6 100644
--- a/cryptography/hazmat/bindings/openssl/pkcs12.py
+++ b/cryptography/hazmat/bindings/openssl/pkcs12.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/pkcs12.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/pkcs7.py b/cryptography/hazmat/bindings/openssl/pkcs7.py
index 43f9540b..1343e566 100644
--- a/cryptography/hazmat/bindings/openssl/pkcs7.py
+++ b/cryptography/hazmat/bindings/openssl/pkcs7.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/pkcs7.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/rand.py b/cryptography/hazmat/bindings/openssl/rand.py
index 0e645fbc..7b1be9df 100644
--- a/cryptography/hazmat/bindings/openssl/rand.py
+++ b/cryptography/hazmat/bindings/openssl/rand.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/rand.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/rsa.py b/cryptography/hazmat/bindings/openssl/rsa.py
index f895cd02..c6356101 100644
--- a/cryptography/hazmat/bindings/openssl/rsa.py
+++ b/cryptography/hazmat/bindings/openssl/rsa.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/rsa.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/ssl.py b/cryptography/hazmat/bindings/openssl/ssl.py
index 25bef49a..362e24e0 100644
--- a/cryptography/hazmat/bindings/openssl/ssl.py
+++ b/cryptography/hazmat/bindings/openssl/ssl.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/ssl.h>
 """
diff --git a/cryptography/hazmat/bindings/openssl/x509.py b/cryptography/hazmat/bindings/openssl/x509.py
index e8b036c3..e800d272 100644
--- a/cryptography/hazmat/bindings/openssl/x509.py
+++ b/cryptography/hazmat/bindings/openssl/x509.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/ssl.h>
 
diff --git a/cryptography/hazmat/bindings/openssl/x509name.py b/cryptography/hazmat/bindings/openssl/x509name.py
index bf627d61..50abee2a 100644
--- a/cryptography/hazmat/bindings/openssl/x509name.py
+++ b/cryptography/hazmat/bindings/openssl/x509name.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/x509.h>
 
diff --git a/cryptography/hazmat/bindings/openssl/x509v3.py b/cryptography/hazmat/bindings/openssl/x509v3.py
index 6d2d2361..02ec250a 100644
--- a/cryptography/hazmat/bindings/openssl/x509v3.py
+++ b/cryptography/hazmat/bindings/openssl/x509v3.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 INCLUDES = """
 #include <openssl/x509v3.h>
 """
diff --git a/cryptography/hazmat/primitives/__init__.py b/cryptography/hazmat/primitives/__init__.py
index e69de29b..2f420574 100644
--- a/cryptography/hazmat/primitives/__init__.py
+++ b/cryptography/hazmat/primitives/__init__.py
@@ -0,0 +1,14 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import, division, print_function
diff --git a/cryptography/hazmat/primitives/asymmetric/__init__.py b/cryptography/hazmat/primitives/asymmetric/__init__.py
index e69de29b..2f420574 100644
--- a/cryptography/hazmat/primitives/asymmetric/__init__.py
+++ b/cryptography/hazmat/primitives/asymmetric/__init__.py
@@ -0,0 +1,14 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import, division, print_function
diff --git a/cryptography/hazmat/primitives/kdf/__init__.py b/cryptography/hazmat/primitives/kdf/__init__.py
index e69de29b..2f420574 100644
--- a/cryptography/hazmat/primitives/kdf/__init__.py
+++ b/cryptography/hazmat/primitives/kdf/__init__.py
@@ -0,0 +1,14 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import, division, print_function
diff --git a/cryptography/hazmat/primitives/kdf/hkdf.py b/cryptography/hazmat/primitives/kdf/hkdf.py
index af15b64d..1a464413 100644
--- a/cryptography/hazmat/primitives/kdf/hkdf.py
+++ b/cryptography/hazmat/primitives/kdf/hkdf.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 import six
 
 from cryptography import utils
diff --git a/cryptography/hazmat/primitives/padding.py b/cryptography/hazmat/primitives/padding.py
index 1717262c..bf634a65 100644
--- a/cryptography/hazmat/primitives/padding.py
+++ b/cryptography/hazmat/primitives/padding.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 import cffi
 
 import six
diff --git a/cryptography/hazmat/primitives/twofactor/__init__.py b/cryptography/hazmat/primitives/twofactor/__init__.py
index e69de29b..2f420574 100644
--- a/cryptography/hazmat/primitives/twofactor/__init__.py
+++ b/cryptography/hazmat/primitives/twofactor/__init__.py
@@ -0,0 +1,14 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import, division, print_function
diff --git a/docs/conf.py b/docs/conf.py
index 3486fb38..9b73a5bb 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,4 +1,18 @@
 # -*- coding: utf-8 -*-
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 #
 # Cryptography documentation build configuration file, created by
 # sphinx-quickstart on Tue Aug  6 19:19:14 2013.
@@ -11,6 +25,8 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
+from __future__ import absolute_import, division, print_function
+
 import os
 import sys
 
diff --git a/docs/cryptography-docs.py b/docs/cryptography-docs.py
index 0252d693..e4e9296c 100644
--- a/docs/cryptography-docs.py
+++ b/docs/cryptography-docs.py
@@ -1,3 +1,18 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import, division, print_function
+
 from docutils import nodes
 
 from sphinx.util.compat import Directive, make_admonition
diff --git a/docs/development/custom-vectors/cast5/generate_cast5.py b/docs/development/custom-vectors/cast5/generate_cast5.py
index 32ef3b43..9dd241c1 100644
--- a/docs/development/custom-vectors/cast5/generate_cast5.py
+++ b/docs/development/custom-vectors/cast5/generate_cast5.py
@@ -1,3 +1,18 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import, division, print_function
+
 import binascii
 
 from cryptography.hazmat.backends import default_backend
diff --git a/setup.py b/setup.py
index 238ee9b7..7f7ba9ef 100644
--- a/setup.py
+++ b/setup.py
@@ -10,6 +10,9 @@
 # implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+from __future__ import absolute_import, division, print_function
+
 import os
 import sys
 from distutils.command.build import build
diff --git a/tests/__init__.py b/tests/__init__.py
index e69de29b..2f420574 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -0,0 +1,14 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import, division, print_function
diff --git a/tests/conftest.py b/tests/conftest.py
index 64982efd..0069f2c0 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,3 +1,18 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import, division, print_function
+
 import pytest
 
 from cryptography.hazmat.backends import _ALL_BACKENDS
diff --git a/tests/hazmat/__init__.py b/tests/hazmat/__init__.py
index e69de29b..2f420574 100644
--- a/tests/hazmat/__init__.py
+++ b/tests/hazmat/__init__.py
@@ -0,0 +1,14 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import, division, print_function
diff --git a/tests/hazmat/backends/__init__.py b/tests/hazmat/backends/__init__.py
index e69de29b..2f420574 100644
--- a/tests/hazmat/backends/__init__.py
+++ b/tests/hazmat/backends/__init__.py
@@ -0,0 +1,14 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import, division, print_function
diff --git a/tests/hazmat/backends/test_commoncrypto.py b/tests/hazmat/backends/test_commoncrypto.py
index 7feb0c72..1062b2ba 100644
--- a/tests/hazmat/backends/test_commoncrypto.py
+++ b/tests/hazmat/backends/test_commoncrypto.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 import pytest
 
 from cryptography import utils
diff --git a/tests/hazmat/backends/test_multibackend.py b/tests/hazmat/backends/test_multibackend.py
index 87ef0446..31fb0a26 100644
--- a/tests/hazmat/backends/test_multibackend.py
+++ b/tests/hazmat/backends/test_multibackend.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 import pytest
 
 from cryptography import utils
diff --git a/tests/hazmat/backends/test_openssl.py b/tests/hazmat/backends/test_openssl.py
index c6792185..599d1531 100644
--- a/tests/hazmat/backends/test_openssl.py
+++ b/tests/hazmat/backends/test_openssl.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 import pytest
 
 from cryptography import utils
diff --git a/tests/hazmat/bindings/test_commoncrypto.py b/tests/hazmat/bindings/test_commoncrypto.py
index db3d1b74..0332674b 100644
--- a/tests/hazmat/bindings/test_commoncrypto.py
+++ b/tests/hazmat/bindings/test_commoncrypto.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 import pytest
 
 from cryptography.hazmat.bindings.commoncrypto.binding import Binding
diff --git a/tests/hazmat/bindings/test_openssl.py b/tests/hazmat/bindings/test_openssl.py
index c476390b..acab22b1 100644
--- a/tests/hazmat/bindings/test_openssl.py
+++ b/tests/hazmat/bindings/test_openssl.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 import pytest
 
 from cryptography.hazmat.bindings.openssl.binding import Binding
diff --git a/tests/hazmat/primitives/__init__.py b/tests/hazmat/primitives/__init__.py
index e69de29b..2f420574 100644
--- a/tests/hazmat/primitives/__init__.py
+++ b/tests/hazmat/primitives/__init__.py
@@ -0,0 +1,14 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import, division, print_function
diff --git a/tests/hazmat/primitives/test_padding.py b/tests/hazmat/primitives/test_padding.py
index 6a2b6243..932cef1e 100644
--- a/tests/hazmat/primitives/test_padding.py
+++ b/tests/hazmat/primitives/test_padding.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 import pytest
 
 import six
diff --git a/tests/hazmat/primitives/twofactor/__init__.py b/tests/hazmat/primitives/twofactor/__init__.py
index e69de29b..2f420574 100644
--- a/tests/hazmat/primitives/twofactor/__init__.py
+++ b/tests/hazmat/primitives/twofactor/__init__.py
@@ -0,0 +1,14 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import, division, print_function
diff --git a/tests/hazmat/primitives/twofactor/test_hotp.py b/tests/hazmat/primitives/twofactor/test_hotp.py
index 0f8c4a53..bc907c9f 100644
--- a/tests/hazmat/primitives/twofactor/test_hotp.py
+++ b/tests/hazmat/primitives/twofactor/test_hotp.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 import os
 
 import pytest
diff --git a/tests/hazmat/primitives/twofactor/test_totp.py b/tests/hazmat/primitives/twofactor/test_totp.py
index a4a108bc..f3bddb88 100644
--- a/tests/hazmat/primitives/twofactor/test_totp.py
+++ b/tests/hazmat/primitives/twofactor/test_totp.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 import pytest
 
 from cryptography.exceptions import InvalidToken
diff --git a/tests/hazmat/primitives/utils.py b/tests/hazmat/primitives/utils.py
index 5a8dc3ab..f0a00319 100644
--- a/tests/hazmat/primitives/utils.py
+++ b/tests/hazmat/primitives/utils.py
@@ -1,3 +1,18 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import, division, print_function
+
 import binascii
 import os
 
diff --git a/tests/test_fernet.py b/tests/test_fernet.py
index bd4d90a5..36e87297 100644
--- a/tests/test_fernet.py
+++ b/tests/test_fernet.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 import base64
 import calendar
 import json
diff --git a/tests/test_utils.py b/tests/test_utils.py
index 622a6656..352085af 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 import os
 import textwrap
 
diff --git a/tests/utils.py b/tests/utils.py
index 0d9567f9..519edb41 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -11,6 +11,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import, division, print_function
+
 import collections
 import os