OPTIGA Trust M  1.1.0
C++ library for Optiga Trust M Chip Security Controller
entropy_poll.h
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1 
6 /*
7  * Copyright (C) 2006-2016, ARM Limited, All Rights Reserved
8  * SPDX-License-Identifier: Apache-2.0
9  *
10  * Licensed under the Apache License, Version 2.0 (the "License"); you may
11  * not use this file except in compliance with the License.
12  * You may obtain a copy of the License at
13  *
14  * http://www.apache.org/licenses/LICENSE-2.0
15  *
16  * Unless required by applicable law or agreed to in writing, software
17  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
18  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19  * See the License for the specific language governing permissions and
20  * limitations under the License.
21  *
22  * This file is part of mbed TLS (https://tls.mbed.org)
23  */
24 #ifndef MBEDTLS_ENTROPY_POLL_H
25 #define MBEDTLS_ENTROPY_POLL_H
26 
27 #if !defined(MBEDTLS_CONFIG_FILE)
28 #include "config.h"
29 #else
30 #include MBEDTLS_CONFIG_FILE
31 #endif
32 
33 #include <stddef.h>
34 
35 #ifdef __cplusplus
36 extern "C" {
37 #endif
38 
39 /*
40  * Default thresholds for built-in sources, in bytes
41  */
42 #define MBEDTLS_ENTROPY_MIN_PLATFORM 32
43 #define MBEDTLS_ENTROPY_MIN_HAVEGE 32
44 #define MBEDTLS_ENTROPY_MIN_HARDCLOCK 4
45 #if !defined(MBEDTLS_ENTROPY_MIN_HARDWARE)
46 #define MBEDTLS_ENTROPY_MIN_HARDWARE 32
47 #endif
48 
52 #if defined(MBEDTLS_TEST_NULL_ENTROPY)
53  int mbedtls_null_entropy_poll( void *data,
54  unsigned char *output, size_t len, size_t *olen );
55 #endif
56 
57 #if !defined(MBEDTLS_NO_PLATFORM_ENTROPY)
58 
61 int mbedtls_platform_entropy_poll( void *data,
62  unsigned char *output, size_t len, size_t *olen );
63 #endif
64 
65 #if defined(MBEDTLS_HAVEGE_C)
66 
71 int mbedtls_havege_poll( void *data,
72  unsigned char *output, size_t len, size_t *olen );
73 #endif
74 
75 #if defined(MBEDTLS_TIMING_C)
76 
79 int mbedtls_hardclock_poll( void *data,
80  unsigned char *output, size_t len, size_t *olen );
81 #endif
82 
83 #if defined(MBEDTLS_ENTROPY_HARDWARE_ALT)
84 
92 int mbedtls_hardware_poll( void *data,
93  unsigned char *output, size_t len, size_t *olen );
94 #endif
95 
96 #if defined(MBEDTLS_ENTROPY_NV_SEED)
97 
102 int mbedtls_nv_seed_poll( void *data,
103  unsigned char *output, size_t len, size_t *olen );
104 #endif
105 
106 #ifdef __cplusplus
107 }
108 #endif
109 
110 #endif /* entropy_poll.h */
int mbedtls_platform_entropy_poll(void *data, unsigned char *output, size_t len, size_t *olen)
Entropy poll callback that provides 0 entropy.
Configuration options (set of defines)