Add static malformed key test

crypto/key_test.go

@@ -415,3 +415,14 @@ func TestKeyCapabilities(t *testing.T) {
 	assert.True(t, publicKey.CanVerify())
 	assert.True(t, publicKey.CanEncrypt())
 }
+
+func TestUnlockMismatchingKey(t *testing.T) {
+	privateKey, err := NewKeyFromArmored(readTestFile("key_mismatching_eddsa_key", false))
+	if err != nil {
+		t.Fatal("Expected no error while unarmoring private key, got:", err)
+	}
+
+	if _, err = privateKey.Unlock([]byte("123")); err == nil {
+		t.Fatalf("Mismatching private key was not detected")
+	}
+}

crypto/testdata/key_mismatching_eddsa_key

@@ -0,0 +1,18 @@
+-----BEGIN PGP PRIVATE KEY BLOCK-----
+Version: OpenPGP.js v4.10.4
+Comment: https://openpgpjs.org
+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+=IsER
+-----END PGP PRIVATE KEY BLOCK-----