.\" Automatically generated by Pod::Man 4.07 (Pod::Simple 3.32) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. 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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" SSL_CTX_set1_curves, SSL_CTX_set1_curves_list, SSL_set1_curves, SSL_set1_curves_list, SSL_get1_curves, SSL_get_shared_curve \- EC supported curve functions .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include \& \& int SSL_CTX_set1_curves(SSL_CTX *ctx, int *clist, int clistlen); \& int SSL_CTX_set1_curves_list(SSL_CTX *ctx, char *list); \& \& int SSL_set1_curves(SSL *ssl, int *clist, int clistlen); \& int SSL_set1_curves_list(SSL *ssl, char *list); \& \& int SSL_get1_curves(SSL *ssl, int *curves); \& int SSL_get_shared_curve(SSL *s, int n); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fISSL_CTX_set1_curves()\fR sets the supported curves for \fBctx\fR to \fBclistlen\fR curves in the array \fBclist\fR. The array consist of all NIDs of curves in preference order. For a \s-1TLS\s0 client the curves are used directly in the supported curves extension. For a \s-1TLS\s0 server the curves are used to determine the set of shared curves. .PP \&\fISSL_CTX_set1_curves_list()\fR sets the supported curves for \fBctx\fR to string \fBlist\fR. The string is a colon separated list of curve NIDs or names, for example \*(L"P\-521:P\-384:P\-256\*(R". .PP \&\fISSL_set1_curves()\fR and \fISSL_set1_curves_list()\fR are similar except they set supported curves for the \s-1SSL\s0 structure \fBssl\fR. .PP \&\fISSL_get1_curves()\fR returns the set of supported curves sent by a client in the supported curves extension. It returns the total number of supported curves. The \fBcurves\fR parameter can be \fB\s-1NULL\s0\fR to simply return the number of curves for memory allocation purposes. The \&\fBcurves\fR array is in the form of a set of curve NIDs in preference order. It can return zero if the client did not send a supported curves extension. .PP \&\fISSL_get_shared_curve()\fR returns shared curve \fBn\fR for a server-side \&\s-1SSL \s0\fBssl\fR. If \fBn\fR is \-1 then the total number of shared curves is returned, which may be zero. Other than for diagnostic purposes, most applications will only be interested in the first shared curve so \fBn\fR is normally set to zero. If the value \fBn\fR is out of range, NID_undef is returned. .PP All these functions are implemented as macros. .SH "NOTES" .IX Header "NOTES" If an application wishes to make use of several of these functions for configuration purposes either on a command line or in a file it should consider using the \s-1SSL_CONF\s0 interface instead of manually parsing options. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fISSL_CTX_set1_curves()\fR, \fISSL_CTX_set1_curves_list()\fR, \fISSL_set1_curves()\fR and \&\fISSL_set1_curves_list()\fR, return 1 for success and 0 for failure. .PP \&\fISSL_get1_curves()\fR returns the number of curves, which may be zero. .PP \&\fISSL_get_shared_curve()\fR returns the \s-1NID\s0 of shared curve \fBn\fR or NID_undef if there is no shared curve \fBn\fR; or the total number of shared curves if \fBn\fR is \-1. .PP When called on a client \fBssl\fR, \fISSL_get_shared_curve()\fR has no meaning and returns \-1. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fISSL_CTX_add_extra_chain_cert\fR\|(3) .SH "HISTORY" .IX Header "HISTORY" These functions were first added to OpenSSL 1.0.2. .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2013\-2016 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 .