Warner Losh
174c0ac687
Remove ancient SCCS tags from the tree, automated scripting, with two minor fixup to keep things compiling. All the common forms in the tree were removed with a perl script. Sponsored by: Netflix
172 lines
5.1 KiB
Plaintext
172 lines
5.1 KiB
Plaintext
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.\" ========================================================================
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.\"
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.IX Title "BN_MOD_INVERSE 3ossl"
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.TH BN_MOD_INVERSE 3ossl "2023-09-19" "3.0.11" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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BN_mod_inverse \- compute inverse modulo n
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/bn.h>
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\&
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\& BIGNUM *BN_mod_inverse(BIGNUM *r, BIGNUM *a, const BIGNUM *n,
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\& BN_CTX *ctx);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\fBBN_mod_inverse()\fR computes the inverse of \fBa\fR modulo \fBn\fR
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places the result in \fBr\fR (\f(CW\*(C`(a*r)%n==1\*(C'\fR). If \fBr\fR is \s-1NULL,\s0
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a new \fB\s-1BIGNUM\s0\fR is created.
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.PP
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\&\fBctx\fR is a previously allocated \fB\s-1BN_CTX\s0\fR used for temporary
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variables. \fBr\fR may be the same \fB\s-1BIGNUM\s0\fR as \fBa\fR or \fBn\fR.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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\&\fBBN_mod_inverse()\fR returns the \fB\s-1BIGNUM\s0\fR containing the inverse, and
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\&\s-1NULL\s0 on error. The error codes can be obtained by \fBERR_get_error\fR\|(3).
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fBERR_get_error\fR\|(3), \fBBN_add\fR\|(3)
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2000\-2017 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file \s-1LICENSE\s0 in the source distribution or at
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<https://www.openssl.org/source/license.html>.
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