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Title "BN_MOD_INVERSE 3"
BN_MOD_INVERSE 3 "2023-08-01" "3.0.10" "OpenSSL"
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"NAME"
BN_mod_inverse - compute inverse modulo n
"SYNOPSIS"
Header "SYNOPSIS" .Vb 1 #include <openssl/bn.h> \& BIGNUM *BN_mod_inverse(BIGNUM *r, BIGNUM *a, const BIGNUM *n, BN_CTX *ctx); .Ve
"DESCRIPTION"
Header "DESCRIPTION" \fBBN_mod_inverse() computes the inverse of a modulo n places the result in r (\*(C`(a*r)%n==1\*(C'). If r is \s-1NULL,\s0 a new \s-1BIGNUM\s0 is created.

\fBctx is a previously allocated \s-1BN_CTX\s0 used for temporary variables. r may be the same \s-1BIGNUM\s0 as a or n.

"RETURN VALUES"
Header "RETURN VALUES" \fBBN_mod_inverse() returns the \s-1BIGNUM\s0 containing the inverse, and \s-1NULL\s0 on error. The error codes can be obtained by ERR_get_error\|(3).
"SEE ALSO"
Header "SEE ALSO" \fBERR_get_error\|(3), BN_add\|(3)
"COPYRIGHT"
Header "COPYRIGHT" Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (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 <https://www.openssl.org/source/license.html>.