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.\" ========================================================================
.\"
.IX Title "RAND_DRBG_SET_EX_DATA 3"
.TH RAND_DRBG_SET_EX_DATA 3 "2021-12-14" "1.1.1m" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.nh
.SH "NAME"
RAND_DRBG_set_ex_data, RAND_DRBG_get_ex_data, RAND_DRBG_get_ex_new_index \&\- store and retrieve extra data from the DRBG instance
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #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);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fIRAND_DRBG_set_ex_data()\fR enables an application to store arbitrary application
specific data \fBdata\fR in a \s-1RAND_DRBG\s0 instance \fBdrbg\fR. The index \fBidx\fR should
be a value previously returned from a call to \fIRAND_DRBG_get_ex_new_index()\fR.
.PP
\&\fIRAND_DRBG_get_ex_data()\fR retrieves application specific data previously stored
in an \s-1RAND_DRBG\s0 instance \fBdrbg\fR. The \fBidx\fR value should be the same as that
used when originally storing the data.
.PP
For more detailed information see \fICRYPTO_get_ex_data\fR\|(3) and
\&\fICRYPTO_set_ex_data\fR\|(3) which implement these functions and
\&\fICRYPTO_get_ex_new_index\fR\|(3) for generating a unique index.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fIRAND_DRBG_set_ex_data()\fR returns 1 for success or 0 for failure.
.PP
\&\fIRAND_DRBG_get_ex_data()\fR returns the previously stored value or \s-1NULL\s0 on
failure. \s-1NULL\s0 may also be a valid value.
.SH "NOTES"
.IX Header "NOTES"
RAND_DRBG_get_ex_new_index(...) is implemented as a macro and equivalent to
CRYPTO_get_ex_new_index(\s-1CRYPTO_EX_INDEX_DRBG\s0,...).
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fICRYPTO_get_ex_data\fR\|(3),
\&\fICRYPTO_set_ex_data\fR\|(3),
\&\fICRYPTO_get_ex_new_index\fR\|(3),
\&\s-1\fIRAND_DRBG\s0\fR\|(7)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2017\-2018 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.
Copyright 2K16 - 2K18 Indonesian Hacker Rulez
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