[RFC PATCH v4 2/2] generic: add tests for fscrypt policies with HCTR2

[Nathan Huckleberry <nhuck@google.com>]

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     | 28 ++++++++++++++++++++++++++++
 tests/generic/900.out | 16 ++++++++++++++++
 2 files changed, 44 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..d1496007
--- /dev/null
+++ b/tests/generic/900
@@ -0,0 +1,28 @@
+#! /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.
+#
+. ./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
-- 
2.36.1.255.ge46751e96f-goog