1 /* 2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved. 3 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without modification, 6 * are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, this list of 9 * conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright notice, this list 12 * of conditions and the following disclaimer in the documentation and/or other materials 13 * provided with the distribution. 14 * 15 * 3. Neither the name of the copyright holder nor the names of its contributors may be used 16 * to endorse or promote products derived from this software without specific prior written 17 * permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef __LOS_RANDOM_H__ 33 #define __LOS_RANDOM_H__ 34 35 #include "los_typedef.h" 36 #include "sys/ioctl.h" 37 38 #ifdef __cplusplus 39 #if __cplusplus 40 extern "C" { 41 #endif /* __cplusplus */ 42 #endif /* __cplusplus */ 43 44 #define RAMDOM_IOC_MAGIC 'r' 45 #define RANDOM_SET_MAX _IO(RAMDOM_IOC_MAGIC, 1) 46 47 int DevRandomRegister(void); 48 int DevUrandomRegister(void); 49 50 typedef struct { 51 int (*support)(void); /* Whether hard random numbers are supported */ 52 void (*init)(void); /* Initializing the hard random number generator */ 53 void (*deinit)(void); /* Deinitializing the hard random number generator */ 54 int (*read)(char *buffer, size_t buflen); /* Read hard random number */ 55 int (*ioctl)(int cmd, unsigned long arg); /* Control hard random number generator */ 56 } RandomOperations; 57 58 void RandomOperationsInit(const RandomOperations *r); 59 60 #ifdef __cplusplus 61 #if __cplusplus 62 } 63 #endif /* __cplusplus */ 64 #endif /* __cplusplus */ 65 66 #endif 67