Refs #5075 -- use ed448_test.json from wycheproof (#5191)

1 files changed, 27 insertions, 3 deletions

diff --git a/tests/wycheproof/test_eddsa.py b/tests/wycheproof/test_eddsa.py
index 5ae87e09..5beca130 100644
--- a/tests/wycheproof/test_eddsa.py
+++ b/tests/wycheproof/test_eddsa.py
@@ -9,9 +9,8 @@ import binascii
 import pytest
 
 from cryptography.exceptions import InvalidSignature
-from cryptography.hazmat.primitives.asymmetric.ed25519 import (
-    Ed25519PublicKey
-)
+from cryptography.hazmat.primitives.asymmetric.ed25519 import Ed25519PublicKey
+from cryptography.hazmat.primitives.asymmetric.ed448 import Ed448PublicKey
 
 
 @pytest.mark.supported(
@@ -41,3 +40,28 @@ def test_ed25519_signature(backend, wycheproof):
                 binascii.unhexlify(wycheproof.testcase["sig"]),
                 binascii.unhexlify(wycheproof.testcase["msg"]),
             )
+
+
+@pytest.mark.supported(
+    only_if=lambda backend: backend.ed448_supported(),
+    skip_message="Requires OpenSSL with Ed448 support"
+)
+@pytest.mark.wycheproof_tests(
+    "ed448_test.json",
+)
+def test_ed448_signature(backend, wycheproof):
+    key = Ed448PublicKey.from_public_bytes(
+        binascii.unhexlify(wycheproof.testgroup["key"]["pk"])
+    )
+
+    if wycheproof.valid or wycheproof.acceptable:
+        key.verify(
+            binascii.unhexlify(wycheproof.testcase["sig"]),
+            binascii.unhexlify(wycheproof.testcase["msg"]),
+        )
+    else:
+        with pytest.raises(InvalidSignature):
+            key.verify(
+                binascii.unhexlify(wycheproof.testcase["sig"]),
+                binascii.unhexlify(wycheproof.testcase["msg"]),
+            )