[PATCH v5 2/2] generic: add tests for fscrypt policies with HCTR2

Nathan Huckleberry
2022-08-03T22:41:47Z

This patch adds fscrypt policy tests for filename encryption using
HCTR2.

More information on HCTR2 can be found here: "Length-preserving
encryption with HCTR2" https://ia.cr/2021/1441

Signed-off-by: Nathan Huckleberry <nhuck@google.com>
---
tests/generic/900 | 31 +++++++++++++++++++++++++++++++
tests/generic/900.out | 16 ++++++++++++++++
2 files changed, 47 insertions(+)
create mode 100755 tests/generic/900
create mode 100644 tests/generic/900.out

diff --git a/tests/generic/900 b/tests/generic/900
new file mode 100755
index 00000000..1ff7c512
--- /dev/null
+++ b/tests/generic/900
@@ -0,0 +1,31 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright 2022 Google LLC
+#
+# FS QA Test No. generic/900
+#
+# Verify ciphertext for v2 encryption policies that use AES-256-XTS to encrypt
+# file contents and AES-256-HCTR2 to encrypt file names.
+#
+# HCTR2 was introduced in kernel commit 6b2a51ff03bf ("fscrypt: Add HCTR2
+# support for filename encryption")
+#
+. ./common/preamble
+_begin_fstest auto quick encrypt
+
+# Import common functions.
+. ./common/filter
+. ./common/encrypt
+
+# real QA test starts here
+_supported_fs generic
+
+_verify_ciphertext_for_encryption_policy AES-256-XTS AES-256-HCTR2 v2
+_verify_ciphertext_for_encryption_policy AES-256-XTS AES-256-HCTR2 \
+ v2 iv_ino_lblk_32
+_verify_ciphertext_for_encryption_policy AES-256-XTS AES-256-HCTR2 \
+ v2 iv_ino_lblk_64
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/900.out b/tests/generic/900.out
new file mode 100644
index 00000000..a87c80b3
--- /dev/null
+++ b/tests/generic/900.out
@@ -0,0 +1,16 @@
+QA output created by 900
+
+Verifying ciphertext with parameters:
+ contents_encryption_mode: AES-256-XTS
+ filenames_encryption_mode: AES-256-HCTR2
+ options: v2
+
+Verifying ciphertext with parameters:
+ contents_encryption_mode: AES-256-XTS
+ filenames_encryption_mode: AES-256-HCTR2
+ options: v2 iv_ino_lblk_32
+
+Verifying ciphertext with parameters:
+ contents_encryption_mode: AES-256-XTS
+ filenames_encryption_mode: AES-256-HCTR2
+ options: v2 iv_ino_lblk_64
--
2.37.1.455.g008518b4e5-goog