1 /* 2 * Copyright (c) 2022 HiSilicon (Shanghai) Technologies CO., LIMITED. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef IOT_HMAC_H 17 #define IOT_HMAC_H 18 19 /** 20 * This file make use the hmac to make mqtt pwd.The method is use the date string to hash the device passwd . 21 * Take care that this implement depends on the hmac of the mbedtls 22 */ 23 24 /** 25 * This function used to generate the passwd for the mqtt to connect the HuaweiIoT platform 26 * @param content: This is the content for the hmac,and usually it is the device passwd set or get from the Iot Platform 27 * @param content_len: The length of the content 28 * @param key: This is the key for the hmac, and usually it is the time, 29 * used in the client_id:the format is：yearmonthdatehour:like 1970010100 30 * @param key_len: The length of the key 31 * @param buf: used to storage the hmac code 32 * @param buf_len:the buf length 33 * @return:0 success while others failed 34 */ 35 int HmacGeneratePwd(unsigned char *content, int contentLen, unsigned char *key, int keyLen, 36 unsigned char *buf) 37 #endif