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entropy.h
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6/*
7 * Copyright The Mbed TLS Contributors
8 * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
9 *
10 * This file is provided under the Apache License 2.0, or the
11 * GNU General Public License v2.0 or later.
12 *
13 * **********
14 * Apache License 2.0:
15 *
16 * Licensed under the Apache License, Version 2.0 (the "License"); you may
17 * not use this file except in compliance with the License.
18 * You may obtain a copy of the License at
19 *
20 * http://www.apache.org/licenses/LICENSE-2.0
21 *
22 * Unless required by applicable law or agreed to in writing, software
23 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
24 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
25 * See the License for the specific language governing permissions and
26 * limitations under the License.
27 *
28 * **********
29 *
30 * **********
31 * GNU General Public License v2.0 or later:
32 *
33 * This program is free software; you can redistribute it and/or modify
34 * it under the terms of the GNU General Public License as published by
35 * the Free Software Foundation; either version 2 of the License, or
36 * (at your option) any later version.
37 *
38 * This program is distributed in the hope that it will be useful,
39 * but WITHOUT ANY WARRANTY; without even the implied warranty of
40 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
41 * GNU General Public License for more details.
42 *
43 * You should have received a copy of the GNU General Public License along
44 * with this program; if not, write to the Free Software Foundation, Inc.,
45 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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48 */
49#ifndef MBEDTLS_ENTROPY_H
50#define MBEDTLS_ENTROPY_H
51
52#if !defined(MBEDTLS_CONFIG_FILE)
53#include "config.h"
54#else
55#include MBEDTLS_CONFIG_FILE
56#endif
57
58#include <stddef.h>
59
60#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_ENTROPY_FORCE_SHA256)
61#include "sha512.h"
62#define MBEDTLS_ENTROPY_SHA512_ACCUMULATOR
63#else
64#if defined(MBEDTLS_SHA256_C)
65#define MBEDTLS_ENTROPY_SHA256_ACCUMULATOR
66#include "sha256.h"
67#endif
68#endif
69
70#if defined(MBEDTLS_THREADING_C)
71#include "threading.h"
72#endif
73
74#if defined(MBEDTLS_HAVEGE_C)
75#include "havege.h"
76#endif
77
78#define MBEDTLS_ERR_ENTROPY_SOURCE_FAILED -0x003C
79#define MBEDTLS_ERR_ENTROPY_MAX_SOURCES -0x003E
80#define MBEDTLS_ERR_ENTROPY_NO_SOURCES_DEFINED -0x0040
81#define MBEDTLS_ERR_ENTROPY_NO_STRONG_SOURCE -0x003D
82#define MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR -0x003F
92#if !defined(MBEDTLS_ENTROPY_MAX_SOURCES)
93#define MBEDTLS_ENTROPY_MAX_SOURCES 20
94#endif
95
96#if !defined(MBEDTLS_ENTROPY_MAX_GATHER)
97#define MBEDTLS_ENTROPY_MAX_GATHER 128
98#endif
99
100/* \} name SECTION: Module settings */
101
102#if defined(MBEDTLS_ENTROPY_SHA512_ACCUMULATOR)
103#define MBEDTLS_ENTROPY_BLOCK_SIZE 64
104#else
105#define MBEDTLS_ENTROPY_BLOCK_SIZE 32
106#endif
107
108#define MBEDTLS_ENTROPY_MAX_SEED_SIZE 1024
109#define MBEDTLS_ENTROPY_SOURCE_MANUAL MBEDTLS_ENTROPY_MAX_SOURCES
110
111#define MBEDTLS_ENTROPY_SOURCE_STRONG 1
112#define MBEDTLS_ENTROPY_SOURCE_WEAK 0
114#ifdef __cplusplus
115extern "C" {
116#endif
117
129typedef int (*mbedtls_entropy_f_source_ptr)(void *data, unsigned char *output, size_t len,
130 size_t *olen);
131
136{
138 void * p_source;
139 size_t size;
140 size_t threshold;
141 int strong;
142}
144
149{
150 int accumulator_started; /* 0 after init.
151 * 1 after the first update.
152 * -1 after free. */
153#if defined(MBEDTLS_ENTROPY_SHA512_ACCUMULATOR)
155#else
157#endif
158 int source_count; /* Number of entries used in source. */
160#if defined(MBEDTLS_HAVEGE_C)
161 mbedtls_havege_state havege_data;
162#endif
163#if defined(MBEDTLS_THREADING_C)
164 mbedtls_threading_mutex_t mutex;
165#endif
166#if defined(MBEDTLS_ENTROPY_NV_SEED)
167 int initial_entropy_run;
168#endif
169}
171
178
185
204 mbedtls_entropy_f_source_ptr f_source, void *p_source,
205 size_t threshold, int strong );
206
216
228int mbedtls_entropy_func( void *data, unsigned char *output, size_t len );
229
241 const unsigned char *data, size_t len );
242
243#if defined(MBEDTLS_ENTROPY_NV_SEED)
252int mbedtls_entropy_update_nv_seed( mbedtls_entropy_context *ctx );
253#endif /* MBEDTLS_ENTROPY_NV_SEED */
254
255#if defined(MBEDTLS_FS_IO)
266int mbedtls_entropy_write_seed_file( mbedtls_entropy_context *ctx, const char *path );
267
280int mbedtls_entropy_update_seed_file( mbedtls_entropy_context *ctx, const char *path );
281#endif /* MBEDTLS_FS_IO */
282
283#if defined(MBEDTLS_SELF_TEST)
292int mbedtls_entropy_self_test( int verbose );
293
294#if defined(MBEDTLS_ENTROPY_HARDWARE_ALT)
308int mbedtls_entropy_source_self_test( int verbose );
309#endif /* MBEDTLS_ENTROPY_HARDWARE_ALT */
310#endif /* MBEDTLS_SELF_TEST */
311
312#ifdef __cplusplus
313}
314#endif
315
316#endif /* entropy.h */
unsigned int(__cdecl typeof(jpeg_read_scanlines))(struct jpeg_decompress_struct *
Definition: typeof.h:31
int(* mbedtls_entropy_f_source_ptr)(void *data, unsigned char *output, size_t len, size_t *olen)
Entropy poll callback pointer.
Definition: entropy.h:129
#define MBEDTLS_ENTROPY_MAX_SOURCES
Definition: entropy.h:93
int mbedtls_entropy_update_manual(mbedtls_entropy_context *ctx, const unsigned char *data, size_t len)
Add data to the accumulator manually (Thread-safe if MBEDTLS_THREADING_C is enabled)
int mbedtls_entropy_gather(mbedtls_entropy_context *ctx)
Trigger an extra gather poll for the accumulator (Thread-safe if MBEDTLS_THREADING_C is enabled)
int mbedtls_entropy_add_source(mbedtls_entropy_context *ctx, mbedtls_entropy_f_source_ptr f_source, void *p_source, size_t threshold, int strong)
Adds an entropy source to poll (Thread-safe if MBEDTLS_THREADING_C is enabled)
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: gl.h:1950
GLenum GLsizei len
Definition: glext.h:6722
HAVEGE: HArdware Volatile Entropy Gathering and Expansion.
#define verbose
Definition: rosglue.h:36
#define mbedtls_entropy_free
#define mbedtls_entropy_init
#define mbedtls_entropy_func
This file contains SHA-224 and SHA-256 definitions and functions.
This file contains SHA-384 and SHA-512 definitions and functions.
Entropy context structure.
Definition: entropy.h:149
mbedtls_sha256_context accumulator
Definition: entropy.h:156
Entropy source state.
Definition: entropy.h:136
mbedtls_entropy_f_source_ptr f_source
Definition: entropy.h:137
HAVEGE state structure.
Definition: havege.h:70
The SHA-256 context structure.
Definition: sha256.h:84
The SHA-512 context structure.
Definition: sha512.h:83
Definition: module.h:456
Threading abstraction layer.