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/*
* Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#ifndef HEADER_DRBG_RAND_H
# define HEADER_DRBG_RAND_H
/* In CTR mode, use derivation function ctr_df */
#define RAND_DRBG_FLAG_CTR_USE_DF 0x2
/*
* Object lifetime functions.
*/
RAND_DRBG *RAND_DRBG_new(int type, unsigned int flags, RAND_DRBG *parent);
int RAND_DRBG_set(RAND_DRBG *drbg, int type, unsigned int flags);
int RAND_DRBG_instantiate(RAND_DRBG *drbg,
const unsigned char *pers, size_t perslen);
int RAND_DRBG_uninstantiate(RAND_DRBG *drbg);
void RAND_DRBG_free(RAND_DRBG *drbg);
/*
* Object "use" functions.
*/
int RAND_DRBG_reseed(RAND_DRBG *drbg,
const unsigned char *adin, size_t adinlen);
int RAND_DRBG_generate(RAND_DRBG *drbg, unsigned char *out, size_t outlen,
int prediction_resistance,
const unsigned char *adin, size_t adinlen);
int RAND_DRBG_set_reseed_interval(RAND_DRBG *drbg, int interval);
RAND_DRBG *RAND_DRBG_get0_global(void);
RAND_DRBG *RAND_DRBG_get0_priv_global(void);
/*
* EXDATA
*/
#define RAND_DRBG_get_ex_new_index(l, p, newf, dupf, freef) \
CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DRBG, l, p, newf, dupf, freef)
int RAND_DRBG_set_ex_data(RAND_DRBG *dctx, int idx, void *arg);
void *RAND_DRBG_get_ex_data(const RAND_DRBG *dctx, int idx);
/*
* Callback functions. See comments in drbg_lib.c
*/
typedef size_t (*RAND_DRBG_get_entropy_fn)(RAND_DRBG *ctx,
unsigned char **pout,
int entropy, size_t min_len,
size_t max_len);
typedef void (*RAND_DRBG_cleanup_entropy_fn)(RAND_DRBG *ctx,
unsigned char *out, size_t outlen);
typedef size_t (*RAND_DRBG_get_nonce_fn)(RAND_DRBG *ctx, unsigned char **pout,
int entropy, size_t min_len,
size_t max_len);
typedef void (*RAND_DRBG_cleanup_nonce_fn)(RAND_DRBG *ctx,
unsigned char *out, size_t outlen);
int RAND_DRBG_set_callbacks(RAND_DRBG *dctx,
RAND_DRBG_get_entropy_fn get_entropy,
RAND_DRBG_cleanup_entropy_fn cleanup_entropy,
RAND_DRBG_get_nonce_fn get_nonce,
RAND_DRBG_cleanup_nonce_fn cleanup_nonce);
#endif
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