1 files changed, 70 insertions, 0 deletions
diff --git a/tests/test_fernet.py b/tests/test_fernet.py
new file mode 100644
index 00000000..a42011a6
--- /dev/null
+++ b/tests/test_fernet.py
@@ -0,0 +1,70 @@
+import base64
+import calendar
+import json
+import os
+
+import iso8601
+
+import pytest
+
+import six
+
+from cryptography.fernet import Fernet, InvalidToken
+
+
+def json_parametrize(keys, fname):
+    path = os.path.join(os.path.dirname(__file__), "vectors", "fernet", fname)
+    with open(path) as f:
+        data = json.load(f)
+    return pytest.mark.parametrize(keys, [
+        tuple([entry[k] for k in keys])
+        for entry in data
+    ])
+
+
+class TestFernet(object):
+    @json_parametrize(
+        ("secret", "now", "iv", "src", "token"), "generate.json",
+    )
+    def test_generate(self, secret, now, iv, src, token):
+        f = Fernet(base64.urlsafe_b64decode(secret.encode("ascii")))
+        actual_token = f._encrypt_from_parts(
+            src.encode("ascii"),
+            calendar.timegm(iso8601.parse_date(now).utctimetuple()),
+            b"".join(map(six.int2byte, iv))
+        )
+        assert actual_token == token
+
+    @json_parametrize(
+        ("secret", "now", "src", "ttl_sec", "token"), "verify.json",
+    )
+    def test_verify(self, secret, now, src, ttl_sec, token):
+        f = Fernet(base64.urlsafe_b64decode(secret.encode("ascii")))
+        current_time = calendar.timegm(iso8601.parse_date(now).utctimetuple())
+        payload = f.decrypt(
+            token.encode("ascii"), ttl=ttl_sec, current_time=current_time
+        )
+        assert payload == src
+
+    @json_parametrize(("secret", "token", "now", "ttl_sec"), "invalid.json")
+    def test_invalid(self, secret, token, now, ttl_sec):
+        f = Fernet(base64.urlsafe_b64decode(secret.encode("ascii")))
+        current_time = calendar.timegm(iso8601.parse_date(now).utctimetuple())
+        with pytest.raises(InvalidToken):
+            f.decrypt(
+                token.encode("ascii"), ttl=ttl_sec, current_time=current_time
+            )
+
+    def test_unicode(self):
+        f = Fernet(b"\x00" * 32)
+        with pytest.raises(TypeError):
+            f.encrypt(six.u(""))
+        with pytest.raises(TypeError):
+            f.decrypt(six.u(""))
+
+    @pytest.mark.parametrize("message", [b"", b"Abc!", b"\x00\xFF\x00\x80"])
+    def test_roundtrips(self, message):
+        f = Fernet(b"\x00" * 32)
+        ciphertext = f.encrypt(message)
+        plaintext = f.decrypt(ciphertext)
+        assert plaintext == message