RAND_DRBG_SET_EX_DATA - Online Linux Manual PageSection : 3
Updated : 2021-03-26
Source : 1.1.1k
Note : OpenSSL
NAMERAND_DRBG_set_ex_data, RAND_DRBG_get_ex_data, RAND_DRBG_get_ex_new_index ​− store and retrieve extra data from the DRBG instance
SYNOPSIS​ #include <openssl/rand_drbg.h> ​ ​ int RAND_DRBG_set_ex_data(RAND_DRBG *drbg, int idx, void *data); ​ ​ void *RAND_DRBG_get_ex_data(const RAND_DRBG *drbg, int idx); ​ ​ int RAND_DRBG_get_ex_new_index(long argl, void *argp, ​ CRYPTO_EX_new *new_func, ​ CRYPTO_EX_dup *dup_func, ​ CRYPTO_EX_free *free_func);
DESCRIPTION​RAND_DRBG_set_ex_data() enables an application to store arbitrary application specific data data in a RAND_DRBG instance drbg. The index idx should be a value previously returned from a call to RAND_DRBG_get_ex_new_index(). ​RAND_DRBG_get_ex_data() retrieves application specific data previously stored in an RAND_DRBG instance drbg. The idx value should be the same as that used when originally storing the data. For more detailed information see CRYPTO_get_ex_data (3) and ​CRYPTO_set_ex_data (3) which implement these functions and ​CRYPTO_get_ex_new_index (3) for generating a unique index.
RETURN VALUES​RAND_DRBG_set_ex_data() returns 1 for success or 0 for failure. ​RAND_DRBG_get_ex_data() returns the previously stored value or NULL on failure. NULL may also be a valid value.
NOTESRAND_DRBG_get_ex_new_index(...) is implemented as a macro and equivalent to CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DRBG,...).
SEE ALSO​CRYPTO_get_ex_data (3), ​CRYPTO_set_ex_data (3), ​CRYPTO_get_ex_new_index (3), ​RAND_DRBG (7)
COPYRIGHTCopyright 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>. 0
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