mbed TLS v2.23.0

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 "mbedtls/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 */
mbedtls_hardclock_poll
int mbedtls_hardclock_poll(void *data, unsigned char *output, size_t len, size_t *olen)
mbedtls_timing_hardclock-based entropy poll callback
mbedtls_platform_entropy_poll
int mbedtls_platform_entropy_poll(void *data, unsigned char *output, size_t len, size_t *olen)
Entropy poll callback that provides 0 entropy.
config.h
Configuration options (set of defines)