Diff: source/btle/btle_security.cpp

Revision:

638:c90ae1400bf2

Parent:

637:f7faad332abc

diff -r f7faad332abc -r c90ae1400bf2 source/btle/btle_security.cpp
--- a/source/btle/btle_security.cpp	Mon Apr 11 16:15:24 2016 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,316 +0,0 @@
-/* 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.
- */
-
-#include "btle.h"
-
-#include "nRF5xn.h"
-
-extern "C" {
-#include "pstorage.h"
-#include "device_manager.h"
-#include "id_manager.h"
-}
-
-#include "btle_security.h"
-
-static dm_application_instance_t applicationInstance;
-static bool                      initialized = false;
-static ret_code_t dm_handler(dm_handle_t const *p_handle, dm_event_t const *p_event, ret_code_t event_result);
-
-// default security parameters
-static ble_gap_sec_params_t securityParameters = {
-    .bond          = true,         /**< Perform bonding. */
-    .mitm          = true,         /**< Man In The Middle protection required. */
-    .io_caps       = SecurityManager::IO_CAPS_NONE, /**< IO capabilities, see @ref BLE_GAP_IO_CAPS. */
-    .oob           = 0,            /**< Out Of Band data available. */
-    .min_key_size  = 16,           /**< Minimum encryption key size in octets between 7 and 16. If 0 then not applicable in this instance. */
-    .max_key_size  = 16,           /**< Maximum encryption key size in octets between min_key_size and 16. */
-    .kdist_periph  = {
-      .enc  = 1,                   /**< Long Term Key and Master Identification. */
-      .id   = 1,                   /**< Identity Resolving Key and Identity Address Information. */
-      .sign = 1,                   /**< Connection Signature Resolving Key. */
-    },                             /**< Key distribution bitmap: keys that the peripheral device will distribute. */
-};
-
-bool
-btle_hasInitializedSecurity(void)
-{
-    return initialized;
-}
-
-ble_error_t
-btle_initializeSecurity(bool                                      enableBonding,
-                        bool                                      requireMITM,
-                        SecurityManager::SecurityIOCapabilities_t iocaps,
-                        const SecurityManager::Passkey_t          passkey)
-{
-    /* guard against multiple initializations */
-    if (initialized) {
-        return BLE_ERROR_NONE;
-    }
-
-    if (pstorage_init() != NRF_SUCCESS) {
-        return BLE_ERROR_UNSPECIFIED;
-    }
-
-    ret_code_t rc;
-    if (passkey) {
-        ble_opt_t opts;
-        opts.gap_opt.passkey.p_passkey = const_cast<uint8_t *>(passkey);
-        if ((rc = sd_ble_opt_set(BLE_GAP_OPT_PASSKEY, &opts)) != NRF_SUCCESS) {
-            switch (rc) {
-                case BLE_ERROR_INVALID_CONN_HANDLE:
-                case NRF_ERROR_INVALID_ADDR:
-                case NRF_ERROR_INVALID_PARAM:
-                default:
-                    return BLE_ERROR_INVALID_PARAM;
-                case NRF_ERROR_INVALID_STATE:
-                    return BLE_ERROR_INVALID_STATE;
-                case NRF_ERROR_BUSY:
-                    return BLE_STACK_BUSY;
-            }
-        }
-    }
-
-    dm_init_param_t dm_init_param = {
-        .clear_persistent_data = false /* Set to true in case the module should clear all persistent data. */
-    };
-    if (dm_init(&dm_init_param) != NRF_SUCCESS) {
-        return BLE_ERROR_UNSPECIFIED;
-    }
-
-    // update default security parameters with function call parameters
-    securityParameters.bond = enableBonding;
-    securityParameters.mitm = requireMITM;
-    securityParameters.io_caps = iocaps;
-
-    const dm_application_param_t dm_param = {
-        .evt_handler  = dm_handler,
-        .service_type = DM_PROTOCOL_CNTXT_GATT_CLI_ID,
-        .sec_param    = securityParameters
-    };
-
-    if ((rc = dm_register(&applicationInstance, &dm_param)) != NRF_SUCCESS) {
-        switch (rc) {
-            case NRF_ERROR_INVALID_STATE:
-                return BLE_ERROR_INVALID_STATE;
-            case NRF_ERROR_NO_MEM:
-                return BLE_ERROR_NO_MEM;
-            default:
-                return BLE_ERROR_UNSPECIFIED;
-        }
-    }
-
-    initialized = true;
-    return BLE_ERROR_NONE;
-}
-
-ble_error_t
-btle_purgeAllBondingState(void)
-{
-    ret_code_t rc;
-    if ((rc = dm_device_delete_all(&applicationInstance)) == NRF_SUCCESS) {
-        return BLE_ERROR_NONE;
-    }
-
-    switch (rc) {
-        case NRF_ERROR_INVALID_STATE:
-            return BLE_ERROR_INVALID_STATE;
-        case NRF_ERROR_NO_MEM:
-            return BLE_ERROR_NO_MEM;
-        default:
-            return BLE_ERROR_UNSPECIFIED;
-    }
-}
-
-ble_error_t
-btle_getLinkSecurity(Gap::Handle_t connectionHandle, SecurityManager::LinkSecurityStatus_t *securityStatusP)
-{
-    ret_code_t rc;
-    dm_handle_t dmHandle = {
-        .appl_id = applicationInstance,
-    };
-    if ((rc = dm_handle_get(connectionHandle, &dmHandle)) != NRF_SUCCESS) {
-        if (rc == NRF_ERROR_NOT_FOUND) {
-            return BLE_ERROR_INVALID_PARAM;
-        } else {
-            return BLE_ERROR_UNSPECIFIED;
-        }
-    }
-
-    if ((rc = dm_security_status_req(&dmHandle, reinterpret_cast<dm_security_status_t *>(securityStatusP))) != NRF_SUCCESS) {
-        switch (rc) {
-            case NRF_ERROR_INVALID_STATE:
-                return BLE_ERROR_INVALID_STATE;
-            case NRF_ERROR_NO_MEM:
-                return BLE_ERROR_NO_MEM;
-            default:
-                return BLE_ERROR_UNSPECIFIED;
-        }
-    }
-
-    return BLE_ERROR_NONE;
-}
-
-ble_error_t
-btle_setLinkSecurity(Gap::Handle_t connectionHandle, SecurityManager::SecurityMode_t securityMode)
-{
-    // use default and updated parameters as starting point
-    // and modify structure based on security mode.
-    ble_gap_sec_params_t params = securityParameters;
-
-    switch (securityMode) {
-        case SecurityManager::SECURITY_MODE_ENCRYPTION_OPEN_LINK:
-            /**< Require no protection, open link. */
-            securityParameters.bond = false;
-            securityParameters.mitm = false;
-            break;
-
-        case SecurityManager::SECURITY_MODE_ENCRYPTION_NO_MITM:
-            /**< Require encryption, but no MITM protection. */
-            securityParameters.bond = true;
-            securityParameters.mitm = false;
-            break;
-
-        // not yet implemented security modes
-        case SecurityManager::SECURITY_MODE_NO_ACCESS:
-        case SecurityManager::SECURITY_MODE_ENCRYPTION_WITH_MITM:
-            /**< Require encryption and MITM protection. */
-        case SecurityManager::SECURITY_MODE_SIGNED_NO_MITM:
-            /**< Require signing or encryption, but no MITM protection. */
-        case SecurityManager::SECURITY_MODE_SIGNED_WITH_MITM:
-            /**< Require signing or encryption, and MITM protection. */
-        default:
-            return BLE_ERROR_NOT_IMPLEMENTED;
-    }
-
-    // update security settings for given connection
-    uint32_t result = sd_ble_gap_authenticate(connectionHandle, &params);
-
-    if (result == NRF_SUCCESS) {
-        return BLE_ERROR_NONE;
-    } else {
-        return BLE_ERROR_UNSPECIFIED;
-    }
-}
-
-ret_code_t
-dm_handler(dm_handle_t const *p_handle, dm_event_t const *p_event, ret_code_t event_result)
-{
-    nRF5xn               &ble             = nRF5xn::Instance(BLE::DEFAULT_INSTANCE);
-    nRF5xSecurityManager &securityManager = (nRF5xSecurityManager &) ble.getSecurityManager();
-
-    switch (p_event->event_id) {
-        case DM_EVT_SECURITY_SETUP: /* started */ {
-            const ble_gap_sec_params_t *peerParams = &p_event->event_param.p_gap_param->params.sec_params_request.peer_params;
-            securityManager.processSecuritySetupInitiatedEvent(p_event->event_param.p_gap_param->conn_handle,
-                                                                                   peerParams->bond,
-                                                                                   peerParams->mitm,
-                                                                                   (SecurityManager::SecurityIOCapabilities_t)peerParams->io_caps);
-            break;
-        }
-        case DM_EVT_SECURITY_SETUP_COMPLETE:
-            securityManager.
-                processSecuritySetupCompletedEvent(p_event->event_param.p_gap_param->conn_handle,
-                                                   (SecurityManager::SecurityCompletionStatus_t)(p_event->event_param.p_gap_param->params.auth_status.auth_status));
-            break;
-        case DM_EVT_LINK_SECURED: {
-            unsigned securityMode                    = p_event->event_param.p_gap_param->params.conn_sec_update.conn_sec.sec_mode.sm;
-            unsigned level                           = p_event->event_param.p_gap_param->params.conn_sec_update.conn_sec.sec_mode.lv;
-            SecurityManager::SecurityMode_t resolvedSecurityMode = SecurityManager::SECURITY_MODE_NO_ACCESS;
-            switch (securityMode) {
-                case 1:
-                    switch (level) {
-                        case 1:
-                            resolvedSecurityMode = SecurityManager::SECURITY_MODE_ENCRYPTION_OPEN_LINK;
-                            break;
-                        case 2:
-                            resolvedSecurityMode = SecurityManager::SECURITY_MODE_ENCRYPTION_NO_MITM;
-                            break;
-                        case 3:
-                            resolvedSecurityMode = SecurityManager::SECURITY_MODE_ENCRYPTION_WITH_MITM;
-                            break;
-                    }
-                    break;
-                case 2:
-                    switch (level) {
-                        case 1:
-                            resolvedSecurityMode = SecurityManager::SECURITY_MODE_SIGNED_NO_MITM;
-                            break;
-                        case 2:
-                            resolvedSecurityMode = SecurityManager::SECURITY_MODE_SIGNED_WITH_MITM;
-                            break;
-                    }
-                    break;
-            }
-
-            securityManager.processLinkSecuredEvent(p_event->event_param.p_gap_param->conn_handle, resolvedSecurityMode);
-            break;
-        }
-        case DM_EVT_DEVICE_CONTEXT_STORED:
-            securityManager.processSecurityContextStoredEvent(p_event->event_param.p_gap_param->conn_handle);
-            break;
-        default:
-            break;
-    }
-
-    return NRF_SUCCESS;
-}
-
-ble_error_t
-btle_createWhitelistFromBondTable(ble_gap_whitelist_t *p_whitelist)
-{
-    if (!btle_hasInitializedSecurity()) {
-        return BLE_ERROR_INITIALIZATION_INCOMPLETE;
-    }
-    ret_code_t err = dm_whitelist_create(&applicationInstance, p_whitelist);
-    if (err == NRF_SUCCESS) {
-        return BLE_ERROR_NONE;
-    } else if (err == NRF_ERROR_NULL) {
-        return BLE_ERROR_PARAM_OUT_OF_RANGE;
-    } else {
-        return BLE_ERROR_INVALID_STATE;
-    }
-}
-
-
-bool
-btle_matchAddressAndIrk(ble_gap_addr_t const * p_addr, ble_gap_irk_t const * p_irk)
-{
-    /*
-     * Use a helper function from the Nordic SDK to test whether the BLE
-     * address can be generated using the IRK.
-     */
-    return im_address_resolve(p_addr, p_irk);
-}
-
-void
-btle_generateResolvableAddress(const ble_gap_irk_t &irk, ble_gap_addr_t &address)
-{
-    /* Set type to resolvable */
-    address.addr_type = BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE;
-
-    /*
-     * Assign a random number to the most significant 3 bytes
-     * of the address.
-     */
-    address.addr[BLE_GAP_ADDR_LEN - 3] = 0x8E;
-    address.addr[BLE_GAP_ADDR_LEN - 2] = 0x4F;
-    address.addr[BLE_GAP_ADDR_LEN - 1] = 0x7C;
-
-    /* Calculate the hash and store it in the top half of the address */
-    ah(irk.irk, &address.addr[BLE_GAP_ADDR_LEN - 3], address.addr);
-}
\ No newline at end of file