23 #ifndef MBEDTLS_ENTROPY_H
24 #define MBEDTLS_ENTROPY_H
26 #if !defined(MBEDTLS_CONFIG_FILE)
29 #include MBEDTLS_CONFIG_FILE
34 #if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_ENTROPY_FORCE_SHA256)
36 #define MBEDTLS_ENTROPY_SHA512_ACCUMULATOR
38 #if defined(MBEDTLS_SHA256_C)
39 #define MBEDTLS_ENTROPY_SHA256_ACCUMULATOR
44 #if defined(MBEDTLS_THREADING_C)
48 #if defined(MBEDTLS_HAVEGE_C)
52 #define MBEDTLS_ERR_ENTROPY_SOURCE_FAILED -0x003C
53 #define MBEDTLS_ERR_ENTROPY_MAX_SOURCES -0x003E
54 #define MBEDTLS_ERR_ENTROPY_NO_SOURCES_DEFINED -0x0040
55 #define MBEDTLS_ERR_ENTROPY_NO_STRONG_SOURCE -0x003D
56 #define MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR -0x003F
66 #if !defined(MBEDTLS_ENTROPY_MAX_SOURCES)
67 #define MBEDTLS_ENTROPY_MAX_SOURCES 20
70 #if !defined(MBEDTLS_ENTROPY_MAX_GATHER)
71 #define MBEDTLS_ENTROPY_MAX_GATHER 128
76 #if defined(MBEDTLS_ENTROPY_SHA512_ACCUMULATOR)
77 #define MBEDTLS_ENTROPY_BLOCK_SIZE 64
79 #define MBEDTLS_ENTROPY_BLOCK_SIZE 32
82 #define MBEDTLS_ENTROPY_MAX_SEED_SIZE 1024
83 #define MBEDTLS_ENTROPY_SOURCE_MANUAL MBEDTLS_ENTROPY_MAX_SOURCES
85 #define MBEDTLS_ENTROPY_SOURCE_STRONG 1
86 #define MBEDTLS_ENTROPY_SOURCE_WEAK 0
124 #if defined(MBEDTLS_ENTROPY_SHA512_ACCUMULATOR)
125 mbedtls_sha512_context accumulator;
131 #if defined(MBEDTLS_HAVEGE_C)
134 #if defined(MBEDTLS_THREADING_C)
173 size_t threshold,
int strong );
209 const unsigned char *data,
size_t len );
211 #if defined(MBEDTLS_FS_IO)
239 #if defined(MBEDTLS_SELF_TEST)
mbedtls_havege_state havege_data
void * p_source
The callback data pointer.
size_t threshold
Minimum bytes required before release.
mbedtls_entropy_f_source_ptr f_source
The entropy source callback.
#define MBEDTLS_ENTROPY_MAX_SOURCES
Maximum number of sources supported.
Configuration options (set of defines)
mbedtls_threading_mutex_t mutex
void mbedtls_entropy_init(mbedtls_entropy_context *ctx)
Initialize the context.
size_t size
Amount received in bytes.
Entropy context structure.
int mbedtls_entropy_self_test(int verbose)
Checkup routine.
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...
Threading abstraction layer.
HAVEGE: HArdware Volatile Entropy Gathering and Expansion.
void mbedtls_entropy_free(mbedtls_entropy_context *ctx)
Free the data in the context.
mbedtls_sha256_context accumulator
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_write_seed_file(mbedtls_entropy_context *ctx, const char *path)
Write a seed file.
SHA-384 and SHA-512 cryptographic hash function.
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_update_seed_file(mbedtls_entropy_context *ctx, const char *path)
Read and update a seed file.
int(* mbedtls_entropy_f_source_ptr)(void *data, unsigned char *output, size_t len, size_t *olen)
Entropy poll callback pointer.
int strong
Is the source strong?
SHA-224 and SHA-256 cryptographic hash function.
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)