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84 #ifndef MBEDTLS_CTR_DRBG_H
85 #define MBEDTLS_CTR_DRBG_H
87 #if !defined(MBEDTLS_CONFIG_FILE)
90 #include MBEDTLS_CONFIG_FILE
95 #if defined(MBEDTLS_THREADING_C)
99 #define MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED -0x0034
100 #define MBEDTLS_ERR_CTR_DRBG_REQUEST_TOO_BIG -0x0036
101 #define MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG -0x0038
102 #define MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR -0x003A
104 #define MBEDTLS_CTR_DRBG_BLOCKSIZE 16
106 #if defined(MBEDTLS_CTR_DRBG_USE_128_BIT_KEY)
107 #define MBEDTLS_CTR_DRBG_KEYSIZE 16
114 #define MBEDTLS_CTR_DRBG_KEYSIZE 32
122 #define MBEDTLS_CTR_DRBG_KEYBITS ( MBEDTLS_CTR_DRBG_KEYSIZE * 8 )
123 #define MBEDTLS_CTR_DRBG_SEEDLEN ( MBEDTLS_CTR_DRBG_KEYSIZE + MBEDTLS_CTR_DRBG_BLOCKSIZE )
138 #if !defined(MBEDTLS_CTR_DRBG_ENTROPY_LEN)
139 #if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_ENTROPY_FORCE_SHA256)
143 #define MBEDTLS_CTR_DRBG_ENTROPY_LEN 48
151 #if !defined(MBEDTLS_CTR_DRBG_USE_128_BIT_KEY)
156 #define MBEDTLS_CTR_DRBG_ENTROPY_LEN 32
160 #if !defined(MBEDTLS_CTR_DRBG_RESEED_INTERVAL)
161 #define MBEDTLS_CTR_DRBG_RESEED_INTERVAL 10000
165 #if !defined(MBEDTLS_CTR_DRBG_MAX_INPUT)
166 #define MBEDTLS_CTR_DRBG_MAX_INPUT 256
170 #if !defined(MBEDTLS_CTR_DRBG_MAX_REQUEST)
171 #define MBEDTLS_CTR_DRBG_MAX_REQUEST 1024
175 #if !defined(MBEDTLS_CTR_DRBG_MAX_SEED_INPUT)
176 #define MBEDTLS_CTR_DRBG_MAX_SEED_INPUT 384
182 #define MBEDTLS_CTR_DRBG_PR_OFF 0
184 #define MBEDTLS_CTR_DRBG_PR_ON 1
216 #if defined(MBEDTLS_THREADING_C)
277 #if MBEDTLS_CTR_DRBG_ENTROPY_LEN < MBEDTLS_CTR_DRBG_KEYSIZE * 3 / 2
287 #if defined(MBEDTLS_THREADING_C)
325 int (*f_entropy)(
void *,
unsigned char *,
size_t),
327 const unsigned char *custom,
415 const unsigned char *additional,
size_t len );
438 const unsigned char *additional,
473 unsigned char *output,
size_t output_len,
474 const unsigned char *additional,
size_t add_len );
482 #if defined(MBEDTLS_THREADING_C)
501 unsigned char *output,
size_t output_len );
504 #if ! defined(MBEDTLS_DEPRECATED_REMOVED)
505 #if defined(MBEDTLS_DEPRECATED_WARNING)
506 #define MBEDTLS_DEPRECATED __attribute__((deprecated))
508 #define MBEDTLS_DEPRECATED
527 const unsigned char *additional,
529 #undef MBEDTLS_DEPRECATED
532 #if defined(MBEDTLS_FS_IO)
563 #if defined(MBEDTLS_SELF_TEST)
577 int (*)(
void *,
unsigned char *,
size_t),
void *,
578 const unsigned char *,
size_t,
size_t );
int mbedtls_ctr_drbg_self_test(int verbose)
The CTR_DRBG checkup routine.
int mbedtls_ctr_drbg_reseed(mbedtls_ctr_drbg_context *ctx, const unsigned char *additional, size_t len)
This function reseeds the CTR_DRBG context, that is extracts data from the entropy source.
int mbedtls_ctr_drbg_seed(mbedtls_ctr_drbg_context *ctx, int(*f_entropy)(void *, unsigned char *, size_t), void *p_entropy, const unsigned char *custom, size_t len)
This function seeds and sets up the CTR_DRBG entropy source for future reseeds.
unsigned char counter[16]
MBEDTLS_DEPRECATED void mbedtls_ctr_drbg_update(mbedtls_ctr_drbg_context *ctx, const unsigned char *additional, size_t add_len)
This function updates the state of the CTR_DRBG context.
void mbedtls_ctr_drbg_set_entropy_len(mbedtls_ctr_drbg_context *ctx, size_t len)
This function sets the amount of entropy grabbed on each seed or reseed.
The CTR_DRBG context structure.
int mbedtls_ctr_drbg_update_ret(mbedtls_ctr_drbg_context *ctx, const unsigned char *additional, size_t add_len)
This function updates the state of the CTR_DRBG context.
This file contains AES definitions and functions.
#define MBEDTLS_DEPRECATED
int mbedtls_ctr_drbg_random(void *p_rng, unsigned char *output, size_t output_len)
This function uses CTR_DRBG to generate random data.
int mbedtls_ctr_drbg_write_seed_file(mbedtls_ctr_drbg_context *ctx, const char *path)
This function writes a seed file.
mbedtls_threading_mutex_t mutex
The AES context-type definition.
int mbedtls_ctr_drbg_random_with_add(void *p_rng, unsigned char *output, size_t output_len, const unsigned char *additional, size_t add_len)
This function updates a CTR_DRBG instance with additional data and uses it to generate random data.
void mbedtls_ctr_drbg_free(mbedtls_ctr_drbg_context *ctx)
This function resets CTR_DRBG context to the state immediately after initial call of mbedtls_ctr_drbg...
int prediction_resistance
struct mbedtls_ctr_drbg_context mbedtls_ctr_drbg_context
The CTR_DRBG context structure.
void mbedtls_ctr_drbg_init(mbedtls_ctr_drbg_context *ctx)
This function initializes the CTR_DRBG context, and prepares it for mbedtls_ctr_drbg_seed() or mbedtl...
Threading abstraction layer.
void mbedtls_ctr_drbg_set_reseed_interval(mbedtls_ctr_drbg_context *ctx, int interval)
This function sets the reseed interval.
int mbedtls_ctr_drbg_update_seed_file(mbedtls_ctr_drbg_context *ctx, const char *path)
This function reads and updates a seed file. The seed is added to this instance.
void mbedtls_ctr_drbg_set_prediction_resistance(mbedtls_ctr_drbg_context *ctx, int resistance)
This function turns prediction resistance on or off. The default value is off.
int mbedtls_ctr_drbg_seed_entropy_len(mbedtls_ctr_drbg_context *, int(*)(void *, unsigned char *, size_t), void *, const unsigned char *, size_t, size_t)
Configuration options (set of defines)
mbedtls_aes_context aes_ctx
int(* f_entropy)(void *, unsigned char *, size_t)