mbed TLS v2.16.6
entropy_poll.h
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1 
6 /*
7  * Copyright (C) 2006-2016, ARM Limited, All Rights Reserved
8  * SPDX-License-Identifier: GPL-2.0
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License along
21  * with this program; if not, write to the Free Software Foundation, Inc.,
22  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23  *
24  * This file is part of mbed TLS (https://tls.mbed.org)
25  */
26 #ifndef MBEDTLS_ENTROPY_POLL_H
27 #define MBEDTLS_ENTROPY_POLL_H
28 
29 #if !defined(MBEDTLS_CONFIG_FILE)
30 #include "config.h"
31 #else
32 #include MBEDTLS_CONFIG_FILE
33 #endif
34 
35 #include <stddef.h>
36 
37 #ifdef __cplusplus
38 extern "C" {
39 #endif
40 
41 /*
42  * Default thresholds for built-in sources, in bytes
43  */
44 #define MBEDTLS_ENTROPY_MIN_PLATFORM 32
45 #define MBEDTLS_ENTROPY_MIN_HAVEGE 32
46 #define MBEDTLS_ENTROPY_MIN_HARDCLOCK 4
47 #if !defined(MBEDTLS_ENTROPY_MIN_HARDWARE)
48 #define MBEDTLS_ENTROPY_MIN_HARDWARE 32
49 #endif
50 
54 #if defined(MBEDTLS_TEST_NULL_ENTROPY)
55  int mbedtls_null_entropy_poll( void *data,
56  unsigned char *output, size_t len, size_t *olen );
57 #endif
58 
59 #if !defined(MBEDTLS_NO_PLATFORM_ENTROPY)
60 
63 int mbedtls_platform_entropy_poll( void *data,
64  unsigned char *output, size_t len, size_t *olen );
65 #endif
66 
67 #if defined(MBEDTLS_HAVEGE_C)
68 
73 int mbedtls_havege_poll( void *data,
74  unsigned char *output, size_t len, size_t *olen );
75 #endif
76 
77 #if defined(MBEDTLS_TIMING_C)
78 
81 int mbedtls_hardclock_poll( void *data,
82  unsigned char *output, size_t len, size_t *olen );
83 #endif
84 
85 #if defined(MBEDTLS_ENTROPY_HARDWARE_ALT)
86 
94 int mbedtls_hardware_poll( void *data,
95  unsigned char *output, size_t len, size_t *olen );
96 #endif
97 
98 #if defined(MBEDTLS_ENTROPY_NV_SEED)
99 
104 int mbedtls_nv_seed_poll( void *data,
105  unsigned char *output, size_t len, size_t *olen );
106 #endif
107 
108 #ifdef __cplusplus
109 }
110 #endif
111 
112 #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.
int mbedtls_hardclock_poll(void *data, unsigned char *output, size_t len, size_t *olen)
mbedtls_timing_hardclock-based entropy poll callback
Configuration options (set of defines)