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/*
* Copyright (C) 2016 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.
*/
#ifndef _FS_CRYPT_H_
#define _FS_CRYPT_H_
#include <sys/cdefs.h>
#include <stdbool.h>
#include <cutils/multiuser.h>
#include <linux/fs.h>
__BEGIN_DECLS
#define FS_KEY_DESCRIPTOR_SIZE_HEX (2 * FS_KEY_DESCRIPTOR_SIZE + 1)
#define FSCRYPT_KEY_IDENTIFIER_HEX_SIZE ((2 * FSCRYPT_KEY_IDENTIFIER_SIZE) + 1)
/* modes not supported by upstream kernel, so not in <linux/fs.h> */
#define FS_ENCRYPTION_MODE_AES_256_HEH 126
#define FS_ENCRYPTION_MODE_PRIVATE 127
/* new definition, not yet in Bionic's <linux/fs.h> */
#ifndef FS_ENCRYPTION_MODE_ADIANTUM
#define FS_ENCRYPTION_MODE_ADIANTUM 9
#endif
/* new definition, not yet in Bionic's <linux/fs.h> */
#ifndef FS_POLICY_FLAG_DIRECT_KEY
#define FS_POLICY_FLAG_DIRECT_KEY 0x4
#endif
#define HEX_LOOKUP "0123456789abcdef"
bool fscrypt_set_mode();
#ifdef USE_FSCRYPT_POLICY_V1
bool lookup_ref_key(struct fscrypt_policy_v1 *fep, uint8_t* policy_type);
#else
bool lookup_ref_key(struct fscrypt_policy_v2 *fep, uint8_t* policy_type);
#endif
bool lookup_ref_tar(const uint8_t *policy_type, uint8_t *policy);
#ifdef USE_FSCRYPT_POLICY_V1
bool fscrypt_policy_get_struct(const char *directory, struct fscrypt_policy_v1 *fep);
#else
bool fscrypt_policy_get_struct(const char *directory, struct fscrypt_policy_v2 *fep);
#endif
#ifdef USE_FSCRYPT_POLICY_V1
bool fscrypt_policy_set_struct(const char *directory, const struct fscrypt_policy_v1 *fep);
#else
bool fscrypt_policy_set_struct(const char *directory, const struct fscrypt_policy_v2 *fep);
#endif
void bytes_to_hex(const uint8_t *bytes, size_t num_bytes, char *hex);
__END_DECLS
#endif // _FS_CRYPT_H_