| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 <assert.h> |
| #include <string.h> |
| |
| #include <os/mynewt.h> |
| |
| #include <mcu/cortex_m4.h> |
| |
| #if MYNEWT_VAL(BSP_NRF52) |
| #include <mcu/nrf52_hal.h> |
| #elif MYNEWT_VAL(BSP_NRF51) |
| #include <mcu/nrf51_hal.h> |
| #else |
| #error "Unsupported arch" |
| #endif |
| |
| #include <enc_flash/enc_flash.h> |
| #include "ef_nrf5x/ef_nrf5x.h" |
| |
| #if MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_ENCRYPTION) |
| #error "At the moment CCM/ECB use cannot coexist" |
| #endif |
| #if MYNEWT_VAL(BLE_LL_CFG_FEAT_LL_PRIVACY) |
| #error "At the moment AAR/ECB use cannot coexist" |
| #endif |
| |
| #define EDEV_TO_NRF5X(dev) (struct eflash_nrf5x_dev *)(dev) |
| #define ENC_FLASH_NONCE "mynewtencfla" |
| |
| static uint8_t * |
| nrf5x_get_block(struct eflash_nrf5x_dev *dev, uint32_t addr) |
| { |
| uint8_t *rblk = NULL; |
| int ctr = 0x100000; |
| |
| memcpy(dev->end_ecb.ene_plain + 12, &addr, sizeof(addr)); |
| |
| NRF_ECB->ECBDATAPTR = (uint32_t)&dev->end_ecb; |
| NRF_ECB->TASKS_STARTECB = 1; |
| while (ctr-- > 0) { |
| if (NRF_ECB->EVENTS_ENDECB) { |
| rblk = dev->end_ecb.ene_cipher; |
| goto out; |
| } |
| if (NRF_ECB->EVENTS_ERRORECB) { |
| NRF_ECB->TASKS_STOPECB = 1; |
| /* XXX maybe sleep and retry? maybe use SW instead? */ |
| break; |
| } |
| } |
| if (ctr == 0) { |
| NRF_ECB->TASKS_STOPECB = 1; |
| } |
| out: |
| NRF_ECB->EVENTS_ENDECB = 0; |
| NRF_ECB->EVENTS_ERRORECB = 0; |
| return rblk; |
| } |
| |
| void |
| enc_flash_crypt_arch(struct enc_flash_dev *edev, uint32_t blk_addr, |
| const uint8_t *src, uint8_t *tgt, int off, int cnt) |
| { |
| struct eflash_nrf5x_dev *dev = EDEV_TO_NRF5X(edev); |
| int sr; |
| uint8_t *blk; |
| int i; |
| |
| __HAL_DISABLE_INTERRUPTS(sr); |
| blk = nrf5x_get_block(dev, blk_addr); |
| blk += off; |
| for (i = 0 ; i < cnt; i++) { |
| *tgt++ = *blk++ ^ *src++; |
| } |
| __HAL_ENABLE_INTERRUPTS(sr); |
| } |
| |
| void |
| enc_flash_setkey_arch(struct enc_flash_dev *edev, uint8_t *key) |
| { |
| struct eflash_nrf5x_dev *dev = EDEV_TO_NRF5X(edev); |
| |
| memcpy(dev->end_ecb.ene_key, key, ENC_FLASH_BLK); |
| } |
| |
| int |
| enc_flash_init_arch(const struct enc_flash_dev *edev) |
| { |
| struct eflash_nrf5x_dev *dev = EDEV_TO_NRF5X(edev); |
| |
| memcpy(dev->end_ecb.ene_plain, ENC_FLASH_NONCE, 12); |
| |
| return 0; |
| } |