chore: Remove support for py2 (#355)

Author: farleyb-amazon

Diff for: .github/workflows/ci_tests.yaml

@@ -28,7 +28,6 @@ jobs:
           - windows-latest
           - macos-latest
         python:
-          - 2.7
           - 3.5
           - 3.6
           - 3.7
@@ -84,22 +83,3 @@ jobs:
           env:
             TOXENV: ${{ matrix.category }}
           run: tox -- -vv
-  upstream-py2:
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: true
-      matrix:
-        category:
-          - test-upstream-requirements-py27
-    steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-python@v1
-        with:
-          python-version: 2.7
-      - run: |
-          python -m pip install --upgrade pip
-          pip install --upgrade -r ci-requirements.txt
-      - name: run test
-        env:
-          TOXENV: ${{ matrix.category }}
-        run: tox -- -vv

Diff for: README.rst

@@ -34,12 +34,7 @@ Getting Started
 Required Prerequisites
 ======================
 
-* Python 2.7+ or 3.4+
-
-  **NOTE: 2.x is the last major version of this library that will
-  support Python 2. Future major versions will begin to adopt changes
-  known to break Python 2. Python 3.4 support will also be removed
-  in future major versions; Python 3.5+ will be required.**
+* Python 3.5+
 * cryptography >= 2.5.0
 * boto3 >= 1.10.0
 * attrs

Diff for: buildspec.yml

@@ -3,13 +3,6 @@ version: 0.2
 batch:
   fast-fail: false
   build-list:
-    - identifier: py27_integ
-      buildspec: codebuild/py27/integ.yml
-    - identifier: py27_examples
-      buildspec: codebuild/py27/examples.yml
-    - identifier: py27_awses_local
-      buildspec: codebuild/py27/awses_local.yml
-
     - identifier: py35_integ
       buildspec: codebuild/py35/integ.yml
     - identifier: py35_examples

Diff for: codebuild/py27/awses_local.yml

@@ -46,6 +46,9 @@ def get_requirements():
         "License :: OSI Approved :: Apache Software License",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: Implementation :: CPython",
         "Topic :: Security",
         "Topic :: Security :: Cryptography",

Diff for: codebuild/py27/examples.yml

@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py{27,34,35,36,37}-{local,integ},
+    py{35,36,37,38,39}-{local,integ},
     bandit, doc8, readme, docs,
     {flake8,pylint}{,-tests},
     # prone to false positives

Diff for: codebuild/py27/integ.yml

@@ -18,7 +18,7 @@
 from cryptography.hazmat.backends import default_backend
 from cryptography.hazmat.primitives.asymmetric import ec
 from cryptography.hazmat.primitives.asymmetric.utils import Prehashed, decode_dss_signature, encode_dss_signature
-from cryptography.utils import InterfaceNotImplemented, int_from_bytes, int_to_bytes, verify_interface
+from cryptography.utils import InterfaceNotImplemented, int_to_bytes, verify_interface
 
 from ...exceptions import NotSupportedError
 from ..str_ops import to_bytes
@@ -123,8 +123,7 @@ def _ecc_decode_compressed_point(curve, compressed_point):
     y_order_map = {b"\x02": 0, b"\x03": 1}
     raw_x = compressed_point[1:]
     raw_x = to_bytes(raw_x)
-    # pylint gives a false positive that int_from_bytes is not callable
-    x = int_from_bytes(raw_x, "big")  # pylint: disable=not-callable
+    x = int.from_bytes(raw_x, "big")
     raw_y = compressed_point[0]
     # In Python3, bytes index calls return int values rather than strings
     if isinstance(raw_y, six.integer_types):

Diff for: decrypt_oracle/setup.py

@@ -45,13 +45,12 @@ def get_requirements():
         "Natural Language :: English",
         "License :: OSI Approved :: Apache Software License",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.4",
         "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: Implementation :: CPython",
         "Topic :: Security",
         "Topic :: Security :: Cryptography",

Diff for: decrypt_oracle/tox.ini

@@ -2,7 +2,7 @@
 envlist =
     # The test vectors depend on new features now,
     # so until release we can only effectively test the local version of the ESDK.
-    py{27,34,35,36,37}-awses_local,
+    py{35,36,37,38,39}-awses_local,
     # 1.2.0 and 1.2.max are being difficult because of attrs
     bandit, doc8, readme, docs,
     {flake8,pylint}{,-tests},
@@ -102,18 +102,6 @@ commands =
         {posargs}
     {[testenv:mypy-coverage]commands}
 
-[testenv:mypy-py2]
-# We only test 2.7, please upgrade
-basepython = python2.7
-deps = {[testenv:mypy-common]deps}
-commands =
-    python -m mypy \
-        --py2 \
-        --linecoverage-report build \
-        src/awses_test_vectors/ \
-        {posargs}
-    {[testenv:mypy-coverage]commands}
-
 # Linters
 [testenv:flake8]
 basepython = python3

Diff for: src/aws_encryption_sdk/internal/crypto/elliptic_curve.py

@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py{27,34,35,36,37,38,39}-{local,integ,accept,examples}, nocmk,
+    py{35,36,37,38,39}-{local,integ,accept,examples}, nocmk,
     bandit, doc8, readme, docs,
     {flake8,pylint}{,-tests,-examples},
     isort-check, black-check,
@@ -94,15 +94,6 @@ recreate = True
 deps =
 commands = {toxinidir}/test/freeze-upstream-requirements.sh
 
-# Freeze for Python 2.7
-[testenv:freeze-upstream-requirements-py27]
-basepython = python2.7
-sitepackages = {[testenv:freeze-upstream-requirements-base]sitepackages}
-skip_install = {[testenv:freeze-upstream-requirements-base]skip_install}
-recreate = {[testenv:freeze-upstream-requirements-base]recreate}
-deps = {[testenv:freeze-upstream-requirements-base]deps}
-commands = {[testenv:freeze-upstream-requirements-base]commands} test/upstream-requirements-py27.txt
-
 # Freeze for Python 3.7
 [testenv:freeze-upstream-requirements-py37]
 basepython = python3.7
@@ -118,14 +109,6 @@ sitepackages = False
 recreate = True
 commands = {[testenv:base-command]commands} test/ -m local
 
-# Test frozen upstream requirements for Python 2.7
-[testenv:test-upstream-requirements-py27]
-basepython = python2.7
-deps = -rtest/upstream-requirements-py27.txt
-sitepackages = {[testenv:test-upstream-requirements-base]sitepackages}
-recreate = {[testenv:test-upstream-requirements-base]recreate}
-commands = {[testenv:test-upstream-requirements-base]commands}
-
 # Test frozen upstream requirements for Python 3.7
 [testenv:test-upstream-requirements-py37]
 basepython = python3.7