24 #ifndef POLARSSL_CTR_DRBG_H
25 #define POLARSSL_CTR_DRBG_H
29 #define POLARSSL_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED -0x0034
30 #define POLARSSL_ERR_CTR_DRBG_REQUEST_TOO_BIG -0x0036
31 #define POLARSSL_ERR_CTR_DRBG_INPUT_TOO_BIG -0x0038
32 #define POLARSSL_ERR_CTR_DRBG_FILE_IO_ERROR -0x003A
34 #define CTR_DRBG_BLOCKSIZE 16
35 #define CTR_DRBG_KEYSIZE 32
36 #define CTR_DRBG_KEYBITS ( CTR_DRBG_KEYSIZE * 8 )
37 #define CTR_DRBG_SEEDLEN ( CTR_DRBG_KEYSIZE + CTR_DRBG_BLOCKSIZE )
48 #if !defined(CTR_DRBG_ENTROPY_LEN)
49 #if defined(POLARSSL_SHA512_C) && !defined(POLARSSL_ENTROPY_FORCE_SHA256)
50 #define CTR_DRBG_ENTROPY_LEN 48
52 #define CTR_DRBG_ENTROPY_LEN 32
56 #if !defined(CTR_DRBG_RESEED_INTERVAL)
57 #define CTR_DRBG_RESEED_INTERVAL 10000
60 #if !defined(CTR_DRBG_MAX_INPUT)
61 #define CTR_DRBG_MAX_INPUT 256
64 #if !defined(CTR_DRBG_MAX_REQUEST)
65 #define CTR_DRBG_MAX_REQUEST 1024
68 #if !defined(CTR_DRBG_MAX_SEED_INPUT)
69 #define CTR_DRBG_MAX_SEED_INPUT 384
74 #define CTR_DRBG_PR_OFF 0
75 #define CTR_DRBG_PR_ON 1
86 unsigned char counter[16];
99 int (*f_entropy)(
void *,
unsigned char *, size_t);
123 int (*f_entropy)(
void *,
unsigned char *,
size_t),
125 const unsigned char *custom,
178 const unsigned char *additional,
size_t len );
192 const unsigned char *additional,
size_t add_len );
210 unsigned char *output,
size_t output_len,
211 const unsigned char *additional,
size_t add_len );
227 unsigned char *output,
size_t output_len );
229 #if defined(POLARSSL_FS_IO)
266 int (*)(
void *,
unsigned char *,
size_t),
void *,
267 const unsigned char *,
size_t,
size_t );
int ctr_drbg_random(void *p_rng, unsigned char *output, size_t output_len)
CTR_DRBG generate random.
void ctr_drbg_set_prediction_resistance(ctr_drbg_context *ctx, int resistance)
Enable / disable prediction resistance (Default: Off)
void ctr_drbg_free(ctr_drbg_context *ctx)
Clear CTR_CRBG context data.
int ctr_drbg_init_entropy_len(ctr_drbg_context *, int(*)(void *, unsigned char *, size_t), void *, const unsigned char *, size_t, size_t)
int prediction_resistance
int ctr_drbg_random_with_add(void *p_rng, unsigned char *output, size_t output_len, const unsigned char *additional, size_t add_len)
CTR_DRBG generate random with additional update input.
int ctr_drbg_reseed(ctr_drbg_context *ctx, const unsigned char *additional, size_t len)
CTR_DRBG reseeding (extracts data from entropy source)
CTR_DRBG context structure.
void ctr_drbg_set_reseed_interval(ctr_drbg_context *ctx, int interval)
Set the reseed interval (Default: CTR_DRBG_RESEED_INTERVAL)
int ctr_drbg_update_seed_file(ctr_drbg_context *ctx, const char *path)
Read and update a seed file.
void ctr_drbg_set_entropy_len(ctr_drbg_context *ctx, size_t len)
Set the amount of entropy grabbed on each (re)seed (Default: CTR_DRBG_ENTROPY_LEN) ...
int ctr_drbg_self_test(int verbose)
Checkup routine.
int ctr_drbg_init(ctr_drbg_context *ctx, int(*f_entropy)(void *, unsigned char *, size_t), void *p_entropy, const unsigned char *custom, size_t len)
CTR_DRBG initialization.
int ctr_drbg_write_seed_file(ctr_drbg_context *ctx, const char *path)
Write a seed file.
void ctr_drbg_update(ctr_drbg_context *ctx, const unsigned char *additional, size_t add_len)
CTR_DRBG update state.