| /* |
| * Copyright 2017-2018 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 |
| |
| # include <time.h> |
| # include <openssl/ossl_typ.h> |
| # include <openssl/obj_mac.h> |
| |
| /* |
| * RAND_DRBG flags |
| * |
| * Note: if new flags are added, the constant `rand_drbg_used_flags` |
| * in drbg_lib.c needs to be updated accordingly. |
| */ |
| |
| /* In CTR mode, disable derivation function ctr_df */ |
| # define RAND_DRBG_FLAG_CTR_NO_DF 0x1 |
| |
| |
| # if OPENSSL_API_COMPAT < 0x10200000L |
| /* This #define was replaced by an internal constant and should not be used. */ |
| # define RAND_DRBG_USED_FLAGS (RAND_DRBG_FLAG_CTR_NO_DF) |
| # endif |
| |
| /* |
| * Default security strength (in the sense of [NIST SP 800-90Ar1]) |
| * |
| * NIST SP 800-90Ar1 supports the strength of the DRBG being smaller than that |
| * of the cipher by collecting less entropy. The current DRBG implementation |
| * does not take RAND_DRBG_STRENGTH into account and sets the strength of the |
| * DRBG to that of the cipher. |
| * |
| * RAND_DRBG_STRENGTH is currently only used for the legacy RAND |
| * implementation. |
| * |
| * Currently supported ciphers are: NID_aes_128_ctr, NID_aes_192_ctr and |
| * NID_aes_256_ctr |
| */ |
| # define RAND_DRBG_STRENGTH 256 |
| /* Default drbg type */ |
| # define RAND_DRBG_TYPE NID_aes_256_ctr |
| /* Default drbg flags */ |
| # define RAND_DRBG_FLAGS 0 |
| |
| |
| # ifdef __cplusplus |
| extern "C" { |
| # endif |
| |
| /* |
| * Object lifetime functions. |
| */ |
| RAND_DRBG *RAND_DRBG_new(int type, unsigned int flags, RAND_DRBG *parent); |
| RAND_DRBG *RAND_DRBG_secure_new(int type, unsigned int flags, RAND_DRBG *parent); |
| int RAND_DRBG_set(RAND_DRBG *drbg, int type, unsigned int flags); |
| int RAND_DRBG_set_defaults(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 prediction_resistance); |
| 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_bytes(RAND_DRBG *drbg, unsigned char *out, size_t outlen); |
| |
| int RAND_DRBG_set_reseed_interval(RAND_DRBG *drbg, unsigned int interval); |
| int RAND_DRBG_set_reseed_time_interval(RAND_DRBG *drbg, time_t interval); |
| |
| int RAND_DRBG_set_reseed_defaults( |
| unsigned int master_reseed_interval, |
| unsigned int slave_reseed_interval, |
| time_t master_reseed_time_interval, |
| time_t slave_reseed_time_interval |
| ); |
| |
| RAND_DRBG *RAND_DRBG_get0_master(void); |
| RAND_DRBG *RAND_DRBG_get0_public(void); |
| RAND_DRBG *RAND_DRBG_get0_private(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 *drbg, int idx, void *arg); |
| void *RAND_DRBG_get_ex_data(const RAND_DRBG *drbg, int idx); |
| |
| /* |
| * Callback function typedefs |
| */ |
| typedef size_t (*RAND_DRBG_get_entropy_fn)(RAND_DRBG *drbg, |
| unsigned char **pout, |
| int entropy, size_t min_len, |
| size_t max_len, |
| int prediction_resistance); |
| 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 *drbg, unsigned char **pout, |
| int entropy, size_t min_len, |
| size_t max_len); |
| typedef void (*RAND_DRBG_cleanup_nonce_fn)(RAND_DRBG *drbg, |
| unsigned char *out, size_t outlen); |
| |
| int RAND_DRBG_set_callbacks(RAND_DRBG *drbg, |
| 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); |
| |
| |
| # ifdef __cplusplus |
| } |
| # endif |
| |
| #endif |