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130 lines
4.7 KiB
C
130 lines
4.7 KiB
C
/*
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* Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#ifndef HEADER_DRBG_RAND_H
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# define HEADER_DRBG_RAND_H
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# include <time.h>
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# include <openssl/ossl_typ.h>
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# include <openssl/obj_mac.h>
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/*
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* RAND_DRBG flags
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*
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* Note: if new flags are added, the constant `rand_drbg_used_flags`
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* in drbg_lib.c needs to be updated accordingly.
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*/
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/* In CTR mode, disable derivation function ctr_df */
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# define RAND_DRBG_FLAG_CTR_NO_DF 0x1
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# if OPENSSL_API_COMPAT < 0x10200000L
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/* This #define was replaced by an internal constant and should not be used. */
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# define RAND_DRBG_USED_FLAGS (RAND_DRBG_FLAG_CTR_NO_DF)
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# endif
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/*
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* Default security strength (in the sense of [NIST SP 800-90Ar1])
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*
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* NIST SP 800-90Ar1 supports the strength of the DRBG being smaller than that
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* of the cipher by collecting less entropy. The current DRBG implementation
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* does not take RAND_DRBG_STRENGTH into account and sets the strength of the
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* DRBG to that of the cipher.
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*
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* RAND_DRBG_STRENGTH is currently only used for the legacy RAND
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* implementation.
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*
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* Currently supported ciphers are: NID_aes_128_ctr, NID_aes_192_ctr and
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* NID_aes_256_ctr
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*/
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# define RAND_DRBG_STRENGTH 256
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/* Default drbg type */
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# define RAND_DRBG_TYPE NID_aes_256_ctr
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/* Default drbg flags */
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# define RAND_DRBG_FLAGS 0
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# ifdef __cplusplus
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extern "C" {
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# endif
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/*
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* Object lifetime functions.
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*/
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RAND_DRBG *RAND_DRBG_new(int type, unsigned int flags, RAND_DRBG *parent);
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RAND_DRBG *RAND_DRBG_secure_new(int type, unsigned int flags, RAND_DRBG *parent);
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int RAND_DRBG_set(RAND_DRBG *drbg, int type, unsigned int flags);
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int RAND_DRBG_set_defaults(int type, unsigned int flags);
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int RAND_DRBG_instantiate(RAND_DRBG *drbg,
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const unsigned char *pers, size_t perslen);
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int RAND_DRBG_uninstantiate(RAND_DRBG *drbg);
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void RAND_DRBG_free(RAND_DRBG *drbg);
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/*
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* Object "use" functions.
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*/
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int RAND_DRBG_reseed(RAND_DRBG *drbg,
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const unsigned char *adin, size_t adinlen,
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int prediction_resistance);
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int RAND_DRBG_generate(RAND_DRBG *drbg, unsigned char *out, size_t outlen,
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int prediction_resistance,
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const unsigned char *adin, size_t adinlen);
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int RAND_DRBG_bytes(RAND_DRBG *drbg, unsigned char *out, size_t outlen);
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int RAND_DRBG_set_reseed_interval(RAND_DRBG *drbg, unsigned int interval);
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int RAND_DRBG_set_reseed_time_interval(RAND_DRBG *drbg, time_t interval);
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int RAND_DRBG_set_reseed_defaults(
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unsigned int master_reseed_interval,
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unsigned int slave_reseed_interval,
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time_t master_reseed_time_interval,
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time_t slave_reseed_time_interval
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);
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RAND_DRBG *RAND_DRBG_get0_master(void);
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RAND_DRBG *RAND_DRBG_get0_public(void);
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RAND_DRBG *RAND_DRBG_get0_private(void);
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/*
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* EXDATA
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*/
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# define RAND_DRBG_get_ex_new_index(l, p, newf, dupf, freef) \
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CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DRBG, l, p, newf, dupf, freef)
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int RAND_DRBG_set_ex_data(RAND_DRBG *drbg, int idx, void *arg);
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void *RAND_DRBG_get_ex_data(const RAND_DRBG *drbg, int idx);
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/*
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* Callback function typedefs
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*/
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typedef size_t (*RAND_DRBG_get_entropy_fn)(RAND_DRBG *drbg,
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unsigned char **pout,
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int entropy, size_t min_len,
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size_t max_len,
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int prediction_resistance);
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typedef void (*RAND_DRBG_cleanup_entropy_fn)(RAND_DRBG *ctx,
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unsigned char *out, size_t outlen);
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typedef size_t (*RAND_DRBG_get_nonce_fn)(RAND_DRBG *drbg, unsigned char **pout,
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int entropy, size_t min_len,
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size_t max_len);
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typedef void (*RAND_DRBG_cleanup_nonce_fn)(RAND_DRBG *drbg,
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unsigned char *out, size_t outlen);
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int RAND_DRBG_set_callbacks(RAND_DRBG *drbg,
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RAND_DRBG_get_entropy_fn get_entropy,
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RAND_DRBG_cleanup_entropy_fn cleanup_entropy,
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RAND_DRBG_get_nonce_fn get_nonce,
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RAND_DRBG_cleanup_nonce_fn cleanup_nonce);
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# ifdef __cplusplus
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}
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# endif
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#endif
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