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DH_generate_key.3
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By calling \&\fIDH_compute_key()\fR, these are combined with the other party's public value to compute the shared key. .PP \&\fIDH_generate_key()\fR expects \fBdh\fR to contain the shared parameters \&\fBdh\->p\fR and \fBdh\->g\fR. It generates a random private \s-1DH\s0 value unless \fBdh\->priv_key\fR is already set, and computes the corresponding public value \fBdh\->pub_key\fR, which can then be published. .PP \&\fIDH_compute_key()\fR computes the shared secret from the private \s-1DH\s0 value in \fBdh\fR and the other party's public value in \fBpub_key\fR and stores it in \fBkey\fR. \fBkey\fR must point to \fBDH_size(dh)\fR bytes of memory. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fIDH_generate_key()\fR returns 1 on success, 0 otherwise. .PP \&\fIDH_compute_key()\fR returns the size of the shared secret on success, \-1 on error. .PP The error codes can be obtained by \fIERR_get_error\fR\|(3). .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fIdh\fR\|(3), \fIERR_get_error\fR\|(3), \fIrand\fR\|(3), \fIDH_size\fR\|(3) .SH "HISTORY" .IX Header "HISTORY" \&\fIDH_generate_key()\fR and \fIDH_compute_key()\fR are available in all versions of SSLeay and OpenSSL.