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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <linux/fscrypt.h>
#include <fscrypt/fscrypt.h>
#include <gtest/gtest.h>
using namespace android::fscrypt;
/* modes not supported by upstream kernel, so not in <linux/fscrypt.h> */
#define FSCRYPT_MODE_AES_256_HEH 126
#define FSCRYPT_MODE_PRIVATE 127
TEST(fscrypt, ParseOptions) {
EncryptionOptions options;
std::string options_string;
EXPECT_FALSE(ParseOptions("", &options));
EXPECT_FALSE(ParseOptions("blah", &options));
EXPECT_TRUE(ParseOptions("software", &options));
EXPECT_EQ(1, options.version);
EXPECT_EQ(FSCRYPT_MODE_AES_256_XTS, options.contents_mode);
EXPECT_EQ(FSCRYPT_MODE_AES_256_CTS, options.filenames_mode);
EXPECT_EQ(FSCRYPT_POLICY_FLAGS_PAD_4, options.flags);
EXPECT_TRUE(OptionsToString(options, &options_string));
EXPECT_EQ("aes-256-xts:aes-256-cts:v1", options_string);
EXPECT_TRUE(ParseOptions("aes-256-xts", &options));
EXPECT_EQ(1, options.version);
EXPECT_EQ(FSCRYPT_MODE_AES_256_XTS, options.contents_mode);
EXPECT_EQ(FSCRYPT_MODE_AES_256_CTS, options.filenames_mode);
EXPECT_EQ(FSCRYPT_POLICY_FLAGS_PAD_4, options.flags);
EXPECT_TRUE(OptionsToString(options, &options_string));
EXPECT_EQ("aes-256-xts:aes-256-cts:v1", options_string);
EXPECT_TRUE(ParseOptions("adiantum", &options));
EXPECT_EQ(1, options.version);
EXPECT_EQ(FSCRYPT_MODE_ADIANTUM, options.contents_mode);
EXPECT_EQ(FSCRYPT_MODE_ADIANTUM, options.filenames_mode);
EXPECT_EQ(FSCRYPT_POLICY_FLAGS_PAD_16 | FSCRYPT_POLICY_FLAG_DIRECT_KEY, options.flags);
EXPECT_TRUE(OptionsToString(options, &options_string));
EXPECT_EQ("adiantum:adiantum:v1", options_string);
EXPECT_TRUE(ParseOptions("adiantum:aes-256-heh", &options));
EXPECT_EQ(1, options.version);
EXPECT_EQ(FSCRYPT_MODE_ADIANTUM, options.contents_mode);
EXPECT_EQ(FSCRYPT_MODE_AES_256_HEH, options.filenames_mode);
EXPECT_EQ(FSCRYPT_POLICY_FLAGS_PAD_16, options.flags);
EXPECT_TRUE(OptionsToString(options, &options_string));
EXPECT_EQ("adiantum:aes-256-heh:v1", options_string);
EXPECT_TRUE(ParseOptions("ice", &options));
EXPECT_EQ(1, options.version);
EXPECT_EQ(FSCRYPT_MODE_PRIVATE, options.contents_mode);
EXPECT_EQ(FSCRYPT_MODE_AES_256_CTS, options.filenames_mode);
EXPECT_EQ(FSCRYPT_POLICY_FLAGS_PAD_4, options.flags);
EXPECT_TRUE(OptionsToString(options, &options_string));
EXPECT_EQ("ice:aes-256-cts:v1", options_string);
EXPECT_FALSE(ParseOptions("ice:blah", &options));
EXPECT_TRUE(ParseOptions("ice:aes-256-cts", &options));
EXPECT_EQ(1, options.version);
EXPECT_EQ(FSCRYPT_MODE_PRIVATE, options.contents_mode);
EXPECT_EQ(FSCRYPT_MODE_AES_256_CTS, options.filenames_mode);
EXPECT_EQ(FSCRYPT_POLICY_FLAGS_PAD_4, options.flags);
EXPECT_TRUE(OptionsToString(options, &options_string));
EXPECT_EQ("ice:aes-256-cts:v1", options_string);
EXPECT_TRUE(ParseOptions("ice:aes-256-heh", &options));
EXPECT_EQ(1, options.version);
EXPECT_EQ(FSCRYPT_MODE_PRIVATE, options.contents_mode);
EXPECT_EQ(FSCRYPT_MODE_AES_256_HEH, options.filenames_mode);
EXPECT_EQ(FSCRYPT_POLICY_FLAGS_PAD_16, options.flags);
EXPECT_TRUE(OptionsToString(options, &options_string));
EXPECT_EQ("ice:aes-256-heh:v1", options_string);
EXPECT_TRUE(ParseOptions("ice:adiantum", &options));
EXPECT_EQ(1, options.version);
EXPECT_EQ(FSCRYPT_MODE_PRIVATE, options.contents_mode);
EXPECT_EQ(FSCRYPT_MODE_ADIANTUM, options.filenames_mode);
EXPECT_EQ(FSCRYPT_POLICY_FLAGS_PAD_16 | FSCRYPT_POLICY_FLAG_DIRECT_KEY, options.flags);
EXPECT_TRUE(OptionsToString(options, &options_string));
EXPECT_EQ("ice:adiantum:v1", options_string);
EXPECT_TRUE(ParseOptions("aes-256-xts:aes-256-cts", &options));
EXPECT_EQ(1, options.version);
EXPECT_EQ(FSCRYPT_MODE_AES_256_XTS, options.contents_mode);
EXPECT_EQ(FSCRYPT_MODE_AES_256_CTS, options.filenames_mode);
EXPECT_EQ(FSCRYPT_POLICY_FLAGS_PAD_4, options.flags);
EXPECT_TRUE(OptionsToString(options, &options_string));
EXPECT_EQ("aes-256-xts:aes-256-cts:v1", options_string);
EXPECT_TRUE(ParseOptions("aes-256-xts:aes-256-cts:v1", &options));
EXPECT_EQ(1, options.version);
EXPECT_EQ(FSCRYPT_MODE_AES_256_XTS, options.contents_mode);
EXPECT_EQ(FSCRYPT_MODE_AES_256_CTS, options.filenames_mode);
EXPECT_EQ(FSCRYPT_POLICY_FLAGS_PAD_4, options.flags);
EXPECT_TRUE(OptionsToString(options, &options_string));
EXPECT_EQ("aes-256-xts:aes-256-cts:v1", options_string);
EXPECT_TRUE(ParseOptions("aes-256-xts:aes-256-cts:v2", &options));
EXPECT_EQ(2, options.version);
EXPECT_EQ(FSCRYPT_MODE_AES_256_XTS, options.contents_mode);
EXPECT_EQ(FSCRYPT_MODE_AES_256_CTS, options.filenames_mode);
EXPECT_EQ(FSCRYPT_POLICY_FLAGS_PAD_16, options.flags);
EXPECT_TRUE(OptionsToString(options, &options_string));
EXPECT_EQ("aes-256-xts:aes-256-cts:v2", options_string);
EXPECT_TRUE(ParseOptions("aes-256-xts:aes-256-cts:v2+inlinecrypt_optimized", &options));
EXPECT_EQ(2, options.version);
EXPECT_EQ(FSCRYPT_MODE_AES_256_XTS, options.contents_mode);
EXPECT_EQ(FSCRYPT_MODE_AES_256_CTS, options.filenames_mode);
EXPECT_EQ(FSCRYPT_POLICY_FLAGS_PAD_16 | FSCRYPT_POLICY_FLAG_IV_INO_LBLK_64, options.flags);
EXPECT_TRUE(OptionsToString(options, &options_string));
EXPECT_EQ("aes-256-xts:aes-256-cts:v2+inlinecrypt_optimized", options_string);
EXPECT_FALSE(ParseOptions("aes-256-xts:aes-256-cts:v2:", &options));
EXPECT_FALSE(ParseOptions("aes-256-xts:aes-256-cts:v2:foo", &options));
EXPECT_FALSE(ParseOptions("aes-256-xts:aes-256-cts:blah", &options));
EXPECT_FALSE(ParseOptions("aes-256-xts:aes-256-cts:vblah", &options));
}
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