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.\" ========================================================================
.\"
.IX Title "BN_copy 3"
.TH BN_copy 3 "2019-12-20" "1.0.2u" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.nh
.SH "NAME"
BN_copy, BN_dup \- copy BIGNUMs
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/bn.h>
\&
\& BIGNUM *BN_copy(BIGNUM *to, const BIGNUM *from);
\&
\& BIGNUM *BN_dup(const BIGNUM *from);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fIBN_copy()\fR copies \fBfrom\fR to \fBto\fR. \fIBN_dup()\fR creates a new \fB\s-1BIGNUM\s0\fR
containing the value \fBfrom\fR.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fIBN_copy()\fR returns \fBto\fR on success, \s-1NULL\s0 on error. \fIBN_dup()\fR returns
the new \fB\s-1BIGNUM\s0\fR, and \s-1NULL\s0 on error. The error codes can be obtained
by \fIERR_get_error\fR\|(3).
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIbn\fR\|(3), \fIERR_get_error\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
\&\fIBN_copy()\fR and \fIBN_dup()\fR are available in all versions of SSLeay and OpenSSL.

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