Add key derivation tests (HKDF, PBKDF2 and X963).

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
2026-05-28 17:11:17 +02:00 · 2023-02-17 23:54:40 +01:00
parent 20c01eb08d
commit 61359c7ebd
5 changed files with 295 additions and 0 deletions
--- a/tests/pico-hsm/test_072_x963.py
+++ b/tests/pico-hsm/test_072_x963.py
@@ -0,0 +1,76 @@
+"""
+/*
+ * This file is part of the Pico HSM distribution (https://github.com/polhenarejos/pico-hsm).
+ * Copyright (c) 2022 Pol Henarejos.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+"""
+
+import pytest
+import os
+from cryptography.hazmat.primitives import hashes
+from cryptography.hazmat.primitives.kdf.x963kdf import X963KDF
+from cryptography import exceptions
+from const import DEFAULT_DKEK_SHARES, DEFAULT_DKEK
+from utils import DOPrefixes
+
+INFO = b'shared message'
+
+def test_prepare_kd(device):
+    device.initialize(dkek_shares=DEFAULT_DKEK_SHARES)
+    resp = device.import_dkek(DEFAULT_DKEK)
+    resp = device.import_dkek(DEFAULT_DKEK)
+
+@pytest.mark.parametrize(
+    "size", [128, 192, 256]
+)
+@pytest.mark.parametrize(
+    "algo", [hashes.SHA1, hashes.SHA224, hashes.SHA256, hashes.SHA384, hashes.SHA512]
+)
+@pytest.mark.parametrize(
+    "out_len", [32, 64, 256, 1024]
+)
+class TestX963:
+    def test_x963_ok(self, device, size, algo, out_len):
+        pkey = os.urandom(size // 8)
+        keyid = device.import_key(pkey)
+        resA = device.x963(algo, keyid, INFO, out_len=out_len)
+        device.delete_file(DOPrefixes.KEY_PREFIX.value << 8 | keyid)
+        xkdf = X963KDF(
+            algorithm=algo(),
+            length=out_len,
+            sharedinfo=INFO,
+        )
+        resB = xkdf.derive(pkey)
+        assert(bytes(resA) == resB)
+        xkdf = X963KDF(
+            algorithm=algo(),
+            length=out_len,
+            sharedinfo=INFO,
+        )
+        xkdf.verify(pkey, bytes(resA))
+
+    def test_x963_fail(self, device, size, algo, out_len):
+        pkey = os.urandom(size // 8)
+        keyid = device.import_key(pkey)
+        resA = device.x963(algo, keyid, INFO, out_len=out_len)
+        device.delete_file(DOPrefixes.KEY_PREFIX.value << 8 | keyid)
+        xkdf = X963KDF(
+            algorithm=algo(),
+            length=out_len,
+            sharedinfo=INFO,
+        )
+        pkey = os.urandom(size // 8)
+        with pytest.raises(exceptions.InvalidKey):
+            xkdf.verify(pkey, bytes(resA))