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/* mbed Microcontroller Library
* Copyright (c) 2006-2013 ARM Limited
*
* 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 __NRF51822_SECURITY_MANAGER_H__
#define __NRF51822_SECURITY_MANAGER_H__
#include <stddef.h>
#include "nRF5xGap.h"
#include "ble/SecurityManager.h"
#include "btle_security.h"
class nRF5xSecurityManager : public SecurityManager
{
public:
/* Functions that must be implemented from SecurityManager */
virtual ble_error_t init(bool enableBonding,
bool requireMITM,
SecurityIOCapabilities_t iocaps,
const Passkey_t passkey) {
return btle_initializeSecurity(enableBonding, requireMITM, iocaps, passkey);
}
virtual ble_error_t getLinkSecurity(Gap::Handle_t connectionHandle, LinkSecurityStatus_t *securityStatusP) {
return btle_getLinkSecurity(connectionHandle, securityStatusP);
}
virtual ble_error_t setLinkSecurity(Gap::Handle_t connectionHandle, SecurityMode_t securityMode) {
return btle_setLinkSecurity(connectionHandle, securityMode);
}
virtual ble_error_t purgeAllBondingState(void) {
return btle_purgeAllBondingState();
}
/**
* @brief Returns a list of addresses from peers in the stacks bond table.
*
* @param[in/out] addresses
* (on input) @ref Gap::Whitelist_t structure where at
* most addresses.capacity addresses from bonded peers will
* be stored.
* (on output) A copy of the addresses from bonded peers.
*
* @return
* BLE_ERROR_NONE if successful.
*/
virtual ble_error_t getAddressesFromBondTable(Gap::Whitelist_t &addresses) const {
uint8_t i;
ble_gap_whitelist_t whitelistFromBondTable;
ble_gap_addr_t *addressPtr[YOTTA_CFG_WHITELIST_MAX_SIZE];
ble_gap_irk_t *irkPtr[YOTTA_CFG_IRK_TABLE_MAX_SIZE];
/* Initialize the structure so that we get as many addreses as the whitelist can hold */
whitelistFromBondTable.addr_count = YOTTA_CFG_IRK_TABLE_MAX_SIZE;
whitelistFromBondTable.pp_addrs = addressPtr;
whitelistFromBondTable.irk_count = YOTTA_CFG_IRK_TABLE_MAX_SIZE;
whitelistFromBondTable.pp_irks = irkPtr;
ble_error_t error = createWhitelistFromBondTable(whitelistFromBondTable);
if (error != BLE_ERROR_NONE) {
addresses.size = 0;
addresses.bonds = 0;
return error;
}
addresses.bonds = whitelistFromBondTable.irk_count;
/* Put all the addresses in the structure */
for (i = 0; i < whitelistFromBondTable.addr_count; ++i) {
if (i >= addresses.capacity) {
/* Ran out of space in the output Gap::Whitelist_t */
addresses.size = i;
return BLE_ERROR_NONE;
}
memcpy(&addresses.addresses[i], whitelistFromBondTable.pp_addrs[i], sizeof(BLEProtocol::Address_t));
}
/* Update the current address count */
addresses.size = i;
/* The assumption here is that the underlying implementation of
* createWhitelistFromBondTable() will not return the private resolvable
* addresses (which is the case in the SoftDevice). Rather it returns the
* IRKs, so we need to generate the private resolvable address by ourselves.
*/
for (i = 0; i < whitelistFromBondTable.irk_count; ++i) {
if (i + addresses.size >= addresses.capacity) {
/* Ran out of space in the output Gap::Whitelist_t */
addresses.size += i;
return BLE_ERROR_NONE;
}
btle_generateResolvableAddress(
*whitelistFromBondTable.pp_irks[i],
(ble_gap_addr_t &) addresses.addresses[i + addresses.size]
);
}
/* Update the current address count */
addresses.size += i;
return BLE_ERROR_NONE;
}
/**
* @brief Clear nRF5xSecurityManager's state.
*
* @return
* BLE_ERROR_NONE if successful.
*/
virtual ble_error_t reset(void)
{
if (SecurityManager::reset() != BLE_ERROR_NONE) {
return BLE_ERROR_INVALID_STATE;
}
return BLE_ERROR_NONE;
}
bool hasInitialized(void) const {
return btle_hasInitializedSecurity();
}
public:
/*
* Allow instantiation from nRF5xn when required.
*/
friend class nRF5xn;
nRF5xSecurityManager() {
/* empty */
}
private:
nRF5xSecurityManager(const nRF5xSecurityManager &);
const nRF5xSecurityManager& operator=(const nRF5xSecurityManager &);
/*
* Expose an interface that allows us to query the SoftDevice bond table
* and extract a whitelist.
*/
ble_error_t createWhitelistFromBondTable(ble_gap_whitelist_t &whitelistFromBondTable) const {
return btle_createWhitelistFromBondTable(&whitelistFromBondTable);
}
/*
* Given a BLE address and a IRK this function check whether the address
* can be generated from the IRK. To do so, this function uses the hash
* function and algorithm described in the Bluetooth low Energy
* Specification. Internally, Nordic SDK functions are used.
*/
bool matchAddressAndIrk(ble_gap_addr_t *address, ble_gap_irk_t *irk) const {
return btle_matchAddressAndIrk(address, irk);
}
/*
* Give nRF5xGap access to createWhitelistFromBondTable() and
* matchAddressAndIrk()
*/
friend class nRF5xGap;
};
#endif // ifndef __NRF51822_SECURITY_MANAGER_H__
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