openssl: Adjust manual pages for 1.0.1n.
[dragonfly.git] / secure / lib / libcrypto / man / BN_mod_inverse.3
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133.\" ========================================================================
134.\"
135.IX Title "BN_mod_inverse 3"
60096f03 136.TH BN_mod_inverse 3 "2015-06-11" "1.0.1n" "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.
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141.SH "NAME"
142BN_mod_inverse \- compute inverse modulo n
143.SH "SYNOPSIS"
8b0cefbb 144.IX Header "SYNOPSIS"
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145.Vb 1
146\& #include <openssl/bn.h>
e257b235 147\&
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148\& BIGNUM *BN_mod_inverse(BIGNUM *r, BIGNUM *a, const BIGNUM *n,
149\& BN_CTX *ctx);
150.Ve
151.SH "DESCRIPTION"
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152.IX Header "DESCRIPTION"
153\&\fIBN_mod_inverse()\fR computes the inverse of \fBa\fR modulo \fBn\fR
5a44c043 154places the result in \fBr\fR (\f(CW\*(C`(a*r)%n==1\*(C'\fR). If \fBr\fR is \s-1NULL,\s0
8b0cefbb 155a new \fB\s-1BIGNUM\s0\fR is created.
984263bc 156.PP
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157\&\fBctx\fR is a previously allocated \fB\s-1BN_CTX\s0\fR used for temporary
158variables. \fBr\fR may be the same \fB\s-1BIGNUM\s0\fR as \fBa\fR or \fBn\fR.
984263bc 159.SH "RETURN VALUES"
74dab6c2 160.IX Header "RETURN VALUES"
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161\&\fIBN_mod_inverse()\fR returns the \fB\s-1BIGNUM\s0\fR containing the inverse, and
162\&\s-1NULL\s0 on error. The error codes can be obtained by \fIERR_get_error\fR\|(3).
163.SH "SEE ALSO"
74dab6c2 164.IX Header "SEE ALSO"
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165\&\fIbn\fR\|(3), \fIERR_get_error\fR\|(3), \fIBN_add\fR\|(3)
166.SH "HISTORY"
984263bc 167.IX Header "HISTORY"
8b0cefbb 168\&\fIBN_mod_inverse()\fR is available in all versions of SSLeay and OpenSSL.