Mbed TLS v2.28.10
entropy_poll.h
Go to the documentation of this file.
1 
6 /*
7  * Copyright The Mbed TLS Contributors
8  * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
9  */
10 #ifndef MBEDTLS_ENTROPY_POLL_H
11 #define MBEDTLS_ENTROPY_POLL_H
12 
13 #if !defined(MBEDTLS_CONFIG_FILE)
14 #include "mbedtls/config.h"
15 #else
16 #include MBEDTLS_CONFIG_FILE
17 #endif
18 
19 #include <stddef.h>
20 
21 #ifdef __cplusplus
22 extern "C" {
23 #endif
24 
25 /*
26  * Default thresholds for built-in sources, in bytes
27  */
28 #define MBEDTLS_ENTROPY_MIN_PLATFORM 32
29 #define MBEDTLS_ENTROPY_MIN_HAVEGE 32
30 #define MBEDTLS_ENTROPY_MIN_HARDCLOCK 4
31 #if !defined(MBEDTLS_ENTROPY_MIN_HARDWARE)
32 #define MBEDTLS_ENTROPY_MIN_HARDWARE 32
33 #endif
34 
38 #if defined(MBEDTLS_TEST_NULL_ENTROPY)
39 int mbedtls_null_entropy_poll(void *data,
40  unsigned char *output, size_t len, size_t *olen);
41 #endif
42 
43 #if !defined(MBEDTLS_NO_PLATFORM_ENTROPY)
44 
47 int mbedtls_platform_entropy_poll(void *data,
48  unsigned char *output, size_t len, size_t *olen);
49 #endif
50 
51 #if defined(MBEDTLS_HAVEGE_C)
52 
57 int mbedtls_havege_poll(void *data,
58  unsigned char *output, size_t len, size_t *olen);
59 #endif
60 
61 #if defined(MBEDTLS_TIMING_C)
62 
65 int mbedtls_hardclock_poll(void *data,
66  unsigned char *output, size_t len, size_t *olen);
67 #endif
68 
69 #if defined(MBEDTLS_ENTROPY_HARDWARE_ALT)
70 
78 int mbedtls_hardware_poll(void *data,
79  unsigned char *output, size_t len, size_t *olen);
80 #endif
81 
82 #if defined(MBEDTLS_ENTROPY_NV_SEED)
83 
88 int mbedtls_nv_seed_poll(void *data,
89  unsigned char *output, size_t len, size_t *olen);
90 #endif
91 
92 #ifdef __cplusplus
93 }
94 #endif
95 
96 #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)