You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
66 lines
2.6 KiB
66 lines
2.6 KiB
/*
|
|
* Copyright (C) 2018 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.
|
|
*/
|
|
|
|
#pragma once
|
|
#include <base/logging.h>
|
|
|
|
#include "stack/include/bt_types.h"
|
|
|
|
namespace crypto_toolbox {
|
|
|
|
extern Octet16 aes_128(const Octet16& key, const Octet16& message);
|
|
extern Octet16 aes_cmac(const Octet16& key, const uint8_t* message,
|
|
uint16_t length);
|
|
extern Octet16 f4(const uint8_t* u, const uint8_t* v, const Octet16& x,
|
|
uint8_t z);
|
|
extern void f5(const uint8_t* w, const Octet16& n1, const Octet16& n2,
|
|
uint8_t* a1, uint8_t* a2, Octet16* mac_key, Octet16* ltk);
|
|
extern Octet16 f6(const Octet16& w, const Octet16& n1, const Octet16& n2,
|
|
const Octet16& r, uint8_t* iocap, uint8_t* a1, uint8_t* a2);
|
|
extern Octet16 h6(const Octet16& w, std::array<uint8_t, 4> keyid);
|
|
extern Octet16 h7(const Octet16& salt, const Octet16& w);
|
|
extern uint32_t g2(const uint8_t* u, const uint8_t* v, const Octet16& x,
|
|
const Octet16& y);
|
|
extern Octet16 ltk_to_link_key(const Octet16& ltk, bool use_h7);
|
|
extern Octet16 link_key_to_ltk(const Octet16& link_key, bool use_h7);
|
|
|
|
/* This function computes AES_128(key, message). |key| must be 128bit.
|
|
* |message| can be at most 16 bytes long, it's length in bytes is given in
|
|
* |length| */
|
|
inline Octet16 aes_128(const Octet16& key, const uint8_t* message,
|
|
const uint8_t length) {
|
|
CHECK(length <= OCTET16_LEN) << "you tried aes_128 more than 16 bytes!";
|
|
Octet16 msg{0};
|
|
std::copy(message, message + length, msg.begin());
|
|
return aes_128(key, msg);
|
|
}
|
|
|
|
// |tlen| - lenth of mac desired
|
|
// |p_signature| - data pointer to where signed data to be stored, tlen long.
|
|
inline void aes_cmac(const Octet16& key, const uint8_t* message,
|
|
uint16_t length, uint16_t tlen, uint8_t* p_signature) {
|
|
Octet16 signature = aes_cmac(key, message, length);
|
|
|
|
uint8_t* p_mac = signature.data() + (OCTET16_LEN - tlen);
|
|
memcpy(p_signature, p_mac, tlen);
|
|
}
|
|
|
|
inline Octet16 aes_cmac(const Octet16& key, const Octet16& message) {
|
|
return aes_cmac(key, message.data(), message.size());
|
|
}
|
|
|
|
} // namespace crypto_toolbox
|