openssl: Adjust manual pages for 1.0.1o.
[dragonfly.git] / secure / lib / libcrypto / man / CRYPTO_set_ex_data.3
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133.\" ========================================================================
134.\"
135.IX Title "CRYPTO_set_ex_data 3"
46af7d9a 136.TH CRYPTO_set_ex_data 3 "2015-06-12" "1.0.1o" "OpenSSL"
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137.\" For nroff, turn off justification. Always turn off hyphenation; it makes
138.\" way too many mistakes in technical documents.
139.if n .ad l
140.nh
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141.SH "NAME"
142CRYPTO_set_ex_data, CRYPTO_get_ex_data \- internal application specific data functions
143.SH "SYNOPSIS"
8b0cefbb 144.IX Header "SYNOPSIS"
984263bc 145.Vb 1
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146\& #include <openssl/crypto.h>
147\&
984263bc 148\& int CRYPTO_set_ex_data(CRYPTO_EX_DATA *r, int idx, void *arg);
e257b235 149\&
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150\& void *CRYPTO_get_ex_data(CRYPTO_EX_DATA *r, int idx);
151.Ve
152.SH "DESCRIPTION"
8b0cefbb 153.IX Header "DESCRIPTION"
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154Several OpenSSL structures can have application specific data attached to them.
155These functions are used internally by OpenSSL to manipulate application
156specific data attached to a specific structure.
157.PP
158These functions should only be used by applications to manipulate
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159\&\fB\s-1CRYPTO_EX_DATA\s0\fR structures passed to the \fB\f(BInew_func()\fB\fR, \fB\f(BIfree_func()\fB\fR and
160\&\fB\f(BIdup_func()\fB\fR callbacks: as passed to \fB\f(BIRSA_get_ex_new_index()\fB\fR for example.
984263bc 161.PP
8b0cefbb 162\&\fB\f(BICRYPTO_set_ex_data()\fB\fR is used to set application specific data, the data is
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163supplied in the \fBarg\fR parameter and its precise meaning is up to the
164application.
165.PP
8b0cefbb 166\&\fB\f(BICRYPTO_get_ex_data()\fB\fR is used to retrieve application specific data. The data
984263bc 167is returned to the application, this will be the same value as supplied to
8b0cefbb 168a previous \fB\f(BICRYPTO_set_ex_data()\fB\fR call.
984263bc 169.SH "RETURN VALUES"
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170.IX Header "RETURN VALUES"
171\&\fB\f(BICRYPTO_set_ex_data()\fB\fR returns 1 on success or 0 on failure.
984263bc 172.PP
8b0cefbb 173\&\fB\f(BICRYPTO_get_ex_data()\fB\fR returns the application data or 0 on failure. 0 may also
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174be valid application data but currently it can only fail if given an invalid \fBidx\fR
175parameter.
176.PP
8b0cefbb 177On failure an error code can be obtained from \fIERR_get_error\fR\|(3).
984263bc 178.SH "SEE ALSO"
74dab6c2 179.IX Header "SEE ALSO"
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180\&\fIRSA_get_ex_new_index\fR\|(3),
181\&\fIDSA_get_ex_new_index\fR\|(3),
182\&\fIDH_get_ex_new_index\fR\|(3)
183.SH "HISTORY"
984263bc 184.IX Header "HISTORY"
8b0cefbb 185\&\fICRYPTO_set_ex_data()\fR and \fICRYPTO_get_ex_data()\fR have been available since SSLeay 0.9.0.