2 * Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #ifndef HEADER_DRBG_RAND_H
11 # define HEADER_DRBG_RAND_H
13 /* Flag for CTR mode only: use derivation function ctr_df */
14 #define RAND_DRBG_FLAG_CTR_USE_DF 0x2
16 const RAND_METHOD *RAND_drbg(void);
18 int RAND_DRBG_set(DRBG_CTX *ctx, int type, unsigned int flags);
19 DRBG_CTX *RAND_DRBG_new(int type, unsigned int flags, DRBG_CTX *parent);
20 int RAND_DRBG_instantiate(DRBG_CTX *dctx,
21 const unsigned char *pers, size_t perslen);
22 int RAND_DRBG_uninstantiate(DRBG_CTX *dctx);
23 int RAND_DRBG_reseed(DRBG_CTX *dctx, const unsigned char *adin, size_t adinlen);
24 int RAND_DRBG_generate(DRBG_CTX *dctx, unsigned char *out, size_t outlen,
25 int prediction_resistance,
26 const unsigned char *adin, size_t adinlen);
27 void RAND_DRBG_free(DRBG_CTX *dctx);
29 typedef size_t (*RAND_DRBG_get_entropy_fn)(DRBG_CTX *ctx, unsigned char **pout,
30 int entropy, size_t min_len,
32 typedef void (*RAND_DRBG_cleanup_entropy_fn)(DRBG_CTX *ctx, unsigned char *out,
34 typedef size_t (*RAND_DRBG_get_nonce_fn)(DRBG_CTX *ctx, unsigned char **pout,
35 int entropy, size_t min_len,
37 typedef void (*RAND_DRBG_cleanup_nonce_fn)(DRBG_CTX *ctx, unsigned char *out,
40 int RAND_DRBG_set_callbacks(DRBG_CTX *dctx,
41 RAND_DRBG_get_entropy_fn get_entropy,
42 RAND_DRBG_cleanup_entropy_fn cleanup_entropy,
43 RAND_DRBG_get_nonce_fn get_nonce,
44 RAND_DRBG_cleanup_nonce_fn cleanup_nonce);
46 int RAND_DRBG_set_reseed_interval(DRBG_CTX *dctx, int interval);
48 #define RAND_DRBG_get_ex_new_index(l, p, newf, dupf, freef) \
49 CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DRBG, l, p, newf, dupf, freef)
50 int RAND_DRBG_set_ex_data(DRBG_CTX *dctx, int idx, void *arg);
51 void *RAND_DRBG_get_ex_data(const DRBG_CTX *dctx, int idx);
53 DRBG_CTX *RAND_DRBG_get_default(void);