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RAND_DRBG_get_ex_data.3
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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .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" \&\fBRAND_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 \fBRAND_DRBG_get_ex_new_index()\fR. .PP \&\fBRAND_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 \fBCRYPTO_get_ex_data\fR\|(3) and \&\fBCRYPTO_set_ex_data\fR\|(3) which implement these functions and \&\fBCRYPTO_get_ex_new_index\fR\|(3) for generating a unique index. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBRAND_DRBG_set_ex_data()\fR returns 1 for success or 0 for failure. .PP \&\fBRAND_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" \&\fBCRYPTO_get_ex_data\fR\|(3), \&\fBCRYPTO_set_ex_data\fR\|(3), \&\fBCRYPTO_get_ex_new_index\fR\|(3), \&\s-1\fBRAND_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>.
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