41 #ifndef MBEDTLS_CTR_DRBG_H
42 #define MBEDTLS_CTR_DRBG_H
44 #if !defined(MBEDTLS_CONFIG_FILE)
47 #include MBEDTLS_CONFIG_FILE
52 #if defined(MBEDTLS_THREADING_C)
56 #define MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED -0x0034
57 #define MBEDTLS_ERR_CTR_DRBG_REQUEST_TOO_BIG -0x0036
58 #define MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG -0x0038
59 #define MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR -0x003A
61 #define MBEDTLS_CTR_DRBG_BLOCKSIZE 16
63 #if defined(MBEDTLS_CTR_DRBG_USE_128_BIT_KEY)
64 #define MBEDTLS_CTR_DRBG_KEYSIZE 16
71 #define MBEDTLS_CTR_DRBG_KEYSIZE 32
79 #define MBEDTLS_CTR_DRBG_KEYBITS ( MBEDTLS_CTR_DRBG_KEYSIZE * 8 )
80 #define MBEDTLS_CTR_DRBG_SEEDLEN ( MBEDTLS_CTR_DRBG_KEYSIZE + MBEDTLS_CTR_DRBG_BLOCKSIZE )
95 #if !defined(MBEDTLS_CTR_DRBG_ENTROPY_LEN)
96 #if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_ENTROPY_FORCE_SHA256)
100 #define MBEDTLS_CTR_DRBG_ENTROPY_LEN 48
108 #if !defined(MBEDTLS_CTR_DRBG_USE_128_BIT_KEY)
113 #define MBEDTLS_CTR_DRBG_ENTROPY_LEN 32
117 #if !defined(MBEDTLS_CTR_DRBG_RESEED_INTERVAL)
118 #define MBEDTLS_CTR_DRBG_RESEED_INTERVAL 10000
122 #if !defined(MBEDTLS_CTR_DRBG_MAX_INPUT)
123 #define MBEDTLS_CTR_DRBG_MAX_INPUT 256
127 #if !defined(MBEDTLS_CTR_DRBG_MAX_REQUEST)
128 #define MBEDTLS_CTR_DRBG_MAX_REQUEST 1024
132 #if !defined(MBEDTLS_CTR_DRBG_MAX_SEED_INPUT)
133 #define MBEDTLS_CTR_DRBG_MAX_SEED_INPUT 384
139 #define MBEDTLS_CTR_DRBG_PR_OFF 0
141 #define MBEDTLS_CTR_DRBG_PR_ON 1
148 #if MBEDTLS_CTR_DRBG_ENTROPY_LEN >= MBEDTLS_CTR_DRBG_KEYSIZE * 3 / 2
155 #define MBEDTLS_CTR_DRBG_ENTROPY_NONCE_LEN 0
163 #define MBEDTLS_CTR_DRBG_ENTROPY_NONCE_LEN ( MBEDTLS_CTR_DRBG_ENTROPY_LEN + 1 ) / 2
202 #if defined(MBEDTLS_THREADING_C)
250 #if MBEDTLS_CTR_DRBG_ENTROPY_NONCE_LEN == 0
306 int (*f_entropy)(
void *,
unsigned char *,
size_t),
308 const unsigned char *custom,
414 const unsigned char *additional,
size_t len );
432 const unsigned char *additional,
462 unsigned char *output,
size_t output_len,
463 const unsigned char *additional,
size_t add_len );
482 unsigned char *output,
size_t output_len );
485 #if ! defined(MBEDTLS_DEPRECATED_REMOVED)
486 #if defined(MBEDTLS_DEPRECATED_WARNING)
487 #define MBEDTLS_DEPRECATED __attribute__((deprecated))
489 #define MBEDTLS_DEPRECATED
508 const unsigned char *additional,
510 #undef MBEDTLS_DEPRECATED
513 #if defined(MBEDTLS_FS_IO)
544 #if defined(MBEDTLS_SELF_TEST)
The CTR_DRBG context structure.
void mbedtls_ctr_drbg_free(mbedtls_ctr_drbg_context *ctx)
This function clears CTR_CRBG context data.
int prediction_resistance
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...
mbedtls_threading_mutex_t mutex
Configuration options (set of defines)
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.
void mbedtls_ctr_drbg_set_reseed_interval(mbedtls_ctr_drbg_context *ctx, int interval)
This function sets the reseed interval.
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.
#define MBEDTLS_DEPRECATED
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...
Threading abstraction layer.
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.
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...
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.
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.
This file contains AES definitions and functions.
int mbedtls_ctr_drbg_set_nonce_len(mbedtls_ctr_drbg_context *ctx, size_t len)
This function sets the amount of entropy grabbed as a nonce for the initial seeding.
int(* f_entropy)(void *, unsigned char *, size_t)
struct mbedtls_ctr_drbg_context mbedtls_ctr_drbg_context
The CTR_DRBG context structure.
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.
int mbedtls_ctr_drbg_self_test(int verbose)
The CTR_DRBG checkup routine.
unsigned char counter[16]
mbedtls_aes_context aes_ctx