Add test validating SSH key pair

src/tests/test_ssh_entry_valid.py

@@ -0,0 +1,40 @@
+import sys
+from pathlib import Path
+from tempfile import TemporaryDirectory
+
+from helpers import create_vault, TEST_SEED, TEST_PASSWORD
+
+sys.path.append(str(Path(__file__).resolve().parents[1]))
+
+from password_manager.entry_management import EntryManager
+from password_manager.backup import BackupManager
+from password_manager.vault import Vault
+from password_manager.config_manager import ConfigManager
+from cryptography.hazmat.primitives import serialization
+
+
+def test_ssh_private_key_corresponds_to_public():
+    with TemporaryDirectory() as tmpdir:
+        tmp_path = Path(tmpdir)
+        vault, enc_mgr = create_vault(tmp_path, TEST_SEED, TEST_PASSWORD)
+        cfg_mgr = ConfigManager(vault, tmp_path)
+        backup_mgr = BackupManager(tmp_path, cfg_mgr)
+        entry_mgr = EntryManager(vault, backup_mgr)
+
+        idx = entry_mgr.add_ssh_key(TEST_SEED)
+        priv_pem, pub_pem = entry_mgr.get_ssh_key_pair(idx, TEST_SEED)
+
+        priv_key = serialization.load_pem_private_key(
+            priv_pem.encode(),
+            password=None,
+        )
+        derived_pub_pem = (
+            priv_key.public_key()
+            .public_bytes(
+                serialization.Encoding.PEM,
+                serialization.PublicFormat.SubjectPublicKeyInfo,
+            )
+            .decode()
+        )
+
+        assert derived_pub_pem == pub_pem