08a65d9686
Every DRBG now supports automatic reseeding not only after a given number of generate requests, but also after a specified time interval. Signed-off-by: Dr. Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com> Reviewed-by: Paul Dale <paul.dale@oracle.com> Reviewed-by: Kurt Roeckx <kurt@roeckx.be> (Merged from https://github.com/openssl/openssl/pull/4402)
115 lines
4.4 KiB
C
115 lines
4.4 KiB
C
/*
|
|
* 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
|
|
|
|
/*
|
|
* Default security strength (in the sense of [NIST SP 800-90Ar1])
|
|
* of the default OpenSSL DRBG, and the corresponding NID.
|
|
*
|
|
* Currently supported values: 128, 192, 256
|
|
*
|
|
* TODO(DRBG): would be nice to have the strength configurable
|
|
*/
|
|
# define RAND_DRBG_STRENGTH 128
|
|
# define RAND_DRBG_NID NID_aes_128_ctr
|
|
|
|
/*
|
|
* 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, unsigned int interval);
|
|
int RAND_DRBG_set_reseed_time_interval(RAND_DRBG *drbg, time_t 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 *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);
|
|
|
|
/*
|
|
* RAND_POOL functions
|
|
*/
|
|
RAND_POOL *RAND_POOL_new(int entropy_requested, size_t min_len, size_t max_len);
|
|
void RAND_POOL_free(RAND_POOL *pool);
|
|
|
|
const unsigned char *RAND_POOL_buffer(RAND_POOL *pool);
|
|
unsigned char *RAND_POOL_detach(RAND_POOL *pool);
|
|
|
|
size_t RAND_POOL_entropy(RAND_POOL *pool);
|
|
size_t RAND_POOL_length(RAND_POOL *pool);
|
|
|
|
size_t RAND_POOL_entropy_available(RAND_POOL *pool);
|
|
size_t RAND_POOL_entropy_needed(RAND_POOL *pool);
|
|
size_t RAND_POOL_bytes_needed(RAND_POOL *pool, unsigned int entropy_per_byte);
|
|
size_t RAND_POOL_bytes_remaining(RAND_POOL *pool);
|
|
|
|
size_t RAND_POOL_add(RAND_POOL *pool,
|
|
const unsigned char *buffer, size_t len, size_t entropy);
|
|
unsigned char *RAND_POOL_add_begin(RAND_POOL *pool, size_t len);
|
|
size_t RAND_POOL_add_end(RAND_POOL *pool, size_t len, size_t entropy);
|
|
|
|
|
|
/*
|
|
* Add random bytes to the pool to acquire requested amount of entropy
|
|
*
|
|
* This function is platform specific and tries to acquire the requested
|
|
* amount of entropy by polling platform specific entropy sources.
|
|
*
|
|
* If the function succeeds in acquiring at least |entropy_requested| bits
|
|
* of entropy, the total entropy count is returned. If it fails, it returns
|
|
* an entropy count of 0.
|
|
*/
|
|
size_t RAND_POOL_acquire_entropy(RAND_POOL *pool);
|
|
#endif
|