1 /******************************************************************************
2  *
3  *  Copyright 2019 The Android Open Source Project
4  *
5  *  Licensed under the Apache License, Version 2.0 (the "License");
6  *  you may not use this file except in compliance with the License.
7  *  You may obtain a copy of the License at:
8  *
9  *  http://www.apache.org/licenses/LICENSE-2.0
10  *
11  *  Unless required by applicable law or agreed to in writing, software
12  *  distributed under the License is distributed on an "AS IS" BASIS,
13  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  *  See the License for the specific language governing permissions and
15  *  limitations under the License.
16  *
17  ******************************************************************************/
18 #pragma once
19 
20 #include <stdint.h>
21 #include <array>
22 
23 namespace bluetooth {
24 namespace security {
25 
26 struct EcdhPublicKey {
27   std::array<uint8_t, 32> x;
28   std::array<uint8_t, 32> y;
29 };
30 
31 /* this generates private and public Eliptic Curve Diffie Helman keys */
32 std::pair<std::array<uint8_t, 32>, EcdhPublicKey> GenerateECDHKeyPair();
33 
34 /* This function validates that the given public key (point) lays on the special
35  * Bluetooth curve */
36 bool ValidateECDHPoint(EcdhPublicKey pk);
37 
38 std::array<uint8_t, 32> ComputeDHKey(std::array<uint8_t, 32> my_private_key, EcdhPublicKey remote_public_key);
39 
40 }  // namespace security
41 }  // namespace bluetooth
42