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entropy.h
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1 
6 /*
7  * Copyright The Mbed TLS Contributors
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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
115 extern "C" {
116 #endif
117 
129 typedef 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 
228 int 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)
244 
252 int mbedtls_entropy_update_nv_seed( mbedtls_entropy_context *ctx );
253 #endif /* MBEDTLS_ENTROPY_NV_SEED */
254 
255 #if defined(MBEDTLS_FS_IO)
256 
266 int mbedtls_entropy_write_seed_file( mbedtls_entropy_context *ctx, const char *path );
267 
280 int mbedtls_entropy_update_seed_file( mbedtls_entropy_context *ctx, const char *path );
281 #endif /* MBEDTLS_FS_IO */
282 
283 #if defined(MBEDTLS_SELF_TEST)
284 
292 int mbedtls_entropy_self_test( int verbose );
293 
294 #if defined(MBEDTLS_ENTROPY_HARDWARE_ALT)
295 
308 int 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 */
static UCHAR ULONG UCHAR ULONG UCHAR * output
Definition: bcrypt.c:29
HAVEGE state structure.
Definition: havege.h:69
mbedtls_entropy_f_source_ptr f_source
Definition: entropy.h:137
#define MBEDTLS_ENTROPY_MAX_SOURCES
Definition: entropy.h:93
void mbedtls_entropy_init(mbedtls_entropy_context *ctx)
Initialize the context.
HANDLE mutex
Definition: loader.c:2140
#define verbose
Definition: rosglue.h:36
Entropy context structure.
Definition: entropy.h:148
int mbedtls_entropy_func(void *data, unsigned char *output, size_t len)
Retrieve entropy from the accumulator (Maximum length: MBEDTLS_ENTROPY_BLOCK_SIZE) (Thread-safe if MB...
struct mbedtls_entropy_source_state mbedtls_entropy_source_state
Entropy source state.
Threading abstraction layer.
The SHA-512 context structure.
Definition: sha512.h:82
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: gl.h:1950
HAVEGE: HArdware Volatile Entropy Gathering and Expansion.
The SHA-256 context structure.
Definition: sha256.h:83
GLenum GLsizei len
Definition: glext.h:6722
void mbedtls_entropy_free(mbedtls_entropy_context *ctx)
Free the data in the context.
mbedtls_sha256_context accumulator
Definition: entropy.h:156
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)
This file contains SHA-384 and SHA-512 definitions and functions.
struct mbedtls_entropy_context mbedtls_entropy_context
Entropy context structure.
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_f_source_ptr)(void *data, unsigned char *output, size_t len, size_t *olen)
Entropy poll callback pointer.
Definition: entropy.h:129
This file contains SHA-224 and SHA-256 definitions and functions.
Entropy source state.
Definition: entropy.h:135
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)
unsigned int(__cdecl typeof(jpeg_read_scanlines))(struct jpeg_decompress_struct *
Definition: typeof.h:31