Diogo Gomes / Mbed 2 deprecated Garagem

BLE Application to open a Garage door

Dependencies:   BLE_API Crypto RNG mbed nRF51822

Fork of BLE_LED by Bluetooth Low Energy

SecurityService.h@12:eaee29bfa1c7, 2015-08-26 (annotated)

Committer:
dgomes
Date:
Wed Aug 26 00:59:07 2015 +0000
Revision:
12:eaee29bfa1c7
Parent:
11:3de9b542eeac
Child:
13:bc1be947b497
All works :) ?

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dgomes 11:3de9b542eeac 1 #ifndef __BLE_SECURITY_SERVICE_H__
dgomes 11:3de9b542eeac 2 #define __BLE_SECURITY_SERVICE_H__
dgomes 11:3de9b542eeac 3
dgomes 11:3de9b542eeac 4 #include "Crypto.h"
dgomes 12:eaee29bfa1c7 5
dgomes 12:eaee29bfa1c7 6
dgomes 11:3de9b542eeac 7 class SecurityService {
dgomes 11:3de9b542eeac 8 public:
dgomes 11:3de9b542eeac 9 const static uint16_t SECURITY_SERVICE_UUID = 0x3000;
dgomes 11:3de9b542eeac 10 const static uint16_t SECURITY_IV_CHARACTERISTIC_UUID = 0x3001;
dgomes 11:3de9b542eeac 11 const static uint16_t SECURITY_KEY_CHARACTERISTIC_UUID = 0x3002;
dgomes 11:3de9b542eeac 12
dgomes 12:eaee29bfa1c7 13 SecurityService(BLE &_ble) :
dgomes 11:3de9b542eeac 14 ble(_ble),
dgomes 12:eaee29bfa1c7 15 SecurityIV(SECURITY_IV_CHARACTERISTIC_UUID, (uint8_t *) "IV"),
dgomes 12:eaee29bfa1c7 16 SecurityKey(SECURITY_KEY_CHARACTERISTIC_UUID, (uint8_t *) "KEY")
dgomes 11:3de9b542eeac 17 {
dgomes 11:3de9b542eeac 18 GattCharacteristic *charTable[] = {&SecurityIV, &SecurityKey};
dgomes 11:3de9b542eeac 19
dgomes 11:3de9b542eeac 20 GattService SecurityService(SECURITY_SERVICE_UUID, charTable, sizeof(charTable) / sizeof(GattCharacteristic *));
dgomes 11:3de9b542eeac 21 ble.gattServer().addService(SecurityService);
dgomes 12:eaee29bfa1c7 22 }
dgomes 12:eaee29bfa1c7 23 void init(char *shared_key) {
dgomes 11:3de9b542eeac 24 //Initialize AES
dgomes 11:3de9b542eeac 25 setKey(shared_key);
dgomes 12:eaee29bfa1c7 26 genIV();
dgomes 11:3de9b542eeac 27 }
dgomes 11:3de9b542eeac 28
dgomes 11:3de9b542eeac 29 void decode(uint8_t *out, uint8_t *in, uint32_t len) {
dgomes 11:3de9b542eeac 30 AES myAES(AES_128, myKey, iv);
dgomes 11:3de9b542eeac 31 myAES.decrypt(out,in,len);
dgomes 11:3de9b542eeac 32 genIV();
dgomes 11:3de9b542eeac 33 }
dgomes 11:3de9b542eeac 34
dgomes 11:3de9b542eeac 35 void setKey(char *shared_key) {
dgomes 12:eaee29bfa1c7 36 DBG("Set shared_key = %s\r\n", shared_key);
dgomes 12:eaee29bfa1c7 37 MD5::computeHash(myKey, (uint8_t*) shared_key, strlen(shared_key));
dgomes 12:eaee29bfa1c7 38 }
dgomes 11:3de9b542eeac 39
dgomes 11:3de9b542eeac 40 void genIV() {
dgomes 11:3de9b542eeac 41 //TODO RANDOM THIS:
dgomes 11:3de9b542eeac 42 uint8_t new_iv[16] = { 0xA2, 0x68, 0x56, 0x36, 0x52, 0x18, 0x71, 0xD0, 0x23, 0x06, 0xE2, 0xEB, 0x8F, 0x70, 0x27, 0xB3 };
dgomes 11:3de9b542eeac 43 memcpy(iv, new_iv,16);
dgomes 11:3de9b542eeac 44 ble.gattServer().write(SecurityIV.getValueHandle(), (uint8_t *)iv, 16*sizeof(uint8_t));
dgomes 11:3de9b542eeac 45 }
dgomes 11:3de9b542eeac 46
dgomes 11:3de9b542eeac 47 GattAttribute::Handle_t getKeyHandle() const {
dgomes 11:3de9b542eeac 48 return SecurityKey.getValueHandle();
dgomes 11:3de9b542eeac 49 }
dgomes 12:eaee29bfa1c7 50
dgomes 12:eaee29bfa1c7 51 private:
dgomes 12:eaee29bfa1c7 52 uint8_t iv[16];
dgomes 12:eaee29bfa1c7 53 uint8_t myKey[16];
dgomes 11:3de9b542eeac 54
dgomes 11:3de9b542eeac 55 BLE &ble;
dgomes 11:3de9b542eeac 56 ReadOnlyArrayGattCharacteristic<uint8_t, 16> SecurityIV;
dgomes 12:eaee29bfa1c7 57 WriteOnlyArrayGattCharacteristic<uint8_t, 16> SecurityKey;
dgomes 11:3de9b542eeac 58 };
dgomes 11:3de9b542eeac 59
dgomes 11:3de9b542eeac 60 #endif /* #ifndef __BLE_SECURITY_SERVICE_H__ */