Split crypt into a package to allow alternative implementations (#189)
diff --git a/tests/crypt/test_crypt.py b/tests/crypt/test_crypt.py
new file mode 100644
index 0000000..d8b1d00
--- /dev/null
+++ b/tests/crypt/test_crypt.py
@@ -0,0 +1,59 @@
+# Copyright 2016 Google Inc.
+#
+# 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.
+
+import os
+
+from google.auth import crypt
+
+
+DATA_DIR = os.path.join(os.path.dirname(__file__), '..', 'data')
+
+# To generate privatekey.pem, privatekey.pub, and public_cert.pem:
+# $ openssl req -new -newkey rsa:1024 -x509 -nodes -out public_cert.pem \
+# > -keyout privatekey.pem
+# $ openssl rsa -in privatekey.pem -pubout -out privatekey.pub
+
+with open(os.path.join(DATA_DIR, 'privatekey.pem'), 'rb') as fh:
+ PRIVATE_KEY_BYTES = fh.read()
+
+with open(os.path.join(DATA_DIR, 'public_cert.pem'), 'rb') as fh:
+ PUBLIC_CERT_BYTES = fh.read()
+
+# To generate other_cert.pem:
+# $ openssl req -new -newkey rsa:1024 -x509 -nodes -out other_cert.pem
+
+with open(os.path.join(DATA_DIR, 'other_cert.pem'), 'rb') as fh:
+ OTHER_CERT_BYTES = fh.read()
+
+
+def test_verify_signature():
+ to_sign = b'foo'
+ signer = crypt.RSASigner.from_string(PRIVATE_KEY_BYTES)
+ signature = signer.sign(to_sign)
+
+ assert crypt.verify_signature(
+ to_sign, signature, PUBLIC_CERT_BYTES)
+
+ # List of certs
+ assert crypt.verify_signature(
+ to_sign, signature, [OTHER_CERT_BYTES, PUBLIC_CERT_BYTES])
+
+
+def test_verify_signature_failure():
+ to_sign = b'foo'
+ signer = crypt.RSASigner.from_string(PRIVATE_KEY_BYTES)
+ signature = signer.sign(to_sign)
+
+ assert not crypt.verify_signature(
+ to_sign, signature, OTHER_CERT_BYTES)