✏ 编辑: ECDH_get_ex_data.3

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.\" ========================================================================
.\"
.IX Title "BIO_GET_EX_NEW_INDEX 3"
.TH BIO_GET_EX_NEW_INDEX 3 "2023-09-11" "1.1.1w" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.nh
.SH "NAME"
BIO_get_ex_new_index, BIO_set_ex_data, BIO_get_ex_data, ENGINE_get_ex_new_index, ENGINE_set_ex_data, ENGINE_get_ex_data, UI_get_ex_new_index, UI_set_ex_data, UI_get_ex_data, X509_get_ex_new_index, X509_set_ex_data, X509_get_ex_data, X509_STORE_get_ex_new_index, X509_STORE_set_ex_data, X509_STORE_get_ex_data, X509_STORE_CTX_get_ex_new_index, X509_STORE_CTX_set_ex_data, X509_STORE_CTX_get_ex_data, DH_get_ex_new_index, DH_set_ex_data, DH_get_ex_data, DSA_get_ex_new_index, DSA_set_ex_data, DSA_get_ex_data, ECDH_get_ex_new_index, ECDH_set_ex_data, ECDH_get_ex_data, EC_KEY_get_ex_new_index, EC_KEY_set_ex_data, EC_KEY_get_ex_data, RSA_get_ex_new_index, RSA_set_ex_data, RSA_get_ex_data \&\- application\-specific data
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/x509.h>
\&
\& int TYPE_get_ex_new_index(long argl, void *argp,
\&                           CRYPTO_EX_new *new_func,
\&                           CRYPTO_EX_dup *dup_func,
\&                           CRYPTO_EX_free *free_func);
\&
\& int TYPE_set_ex_data(TYPE *d, int idx, void *arg);
\&
\& void *TYPE_get_ex_data(TYPE *d, int idx);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
In the description here, \fI\s-1TYPE\s0\fR is used a placeholder
for any of the OpenSSL datatypes listed in
\&\fICRYPTO_get_ex_new_index\fR\|(3).
.PP
These functions handle application-specific data for OpenSSL data
structures.
.PP
\&\fITYPE_get_ex_new_index()\fR is a macro that calls \fICRYPTO_get_ex_new_index()\fR
with the correct \fBindex\fR value.
.PP
\&\fITYPE_set_ex_data()\fR is a function that calls \fICRYPTO_set_ex_data()\fR with
an offset into the opaque exdata part of the \s-1TYPE\s0 object.
.PP
\&\fITYPE_get_ex_data()\fR is a function that calls \fICRYPTO_get_ex_data()\fR with
an offset into the opaque exdata part of the \s-1TYPE\s0 object.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fITYPE_get_ex_new_index()\fR returns a new index on success or \-1 on error.
.PP
\&\fITYPE_set_ex_data()\fR returns 1 on success or 0 on error.
.PP
\&\fITYPE_get_ex_data()\fR returns the application data or \s-1NULL\s0 if an error occurred.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fICRYPTO_get_ex_new_index\fR\|(3).
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2015\-2020 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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