BN_mod_inverse(3SSL)                         OpenSSL                         BN_mod_inverse(3SSL)



NAME
       BN_mod_inverse - compute inverse modulo n

SYNOPSIS
        #include <openssl/bn.h>

        BIGNUM *BN_mod_inverse(BIGNUM *r, BIGNUM *a, const BIGNUM *n,
                  BN_CTX *ctx);

DESCRIPTION
       BN_mod_inverse() computes the inverse of a modulo n places the result in r ("(a*r)%n==1").
       If r is NULL, a new BIGNUM is created.

       ctx is a previously allocated BN_CTX used for temporary variables. r may be the same
       BIGNUM as a or n.

RETURN VALUES
       BN_mod_inverse() returns the BIGNUM containing the inverse, and NULL on error. The error
       codes can be obtained by ERR_get_error(3).

SEE ALSO
       bn(3), ERR_get_error(3), BN_add(3)

HISTORY
       BN_mod_inverse() is available in all versions of SSLeay and OpenSSL.



1.0.1t                                      2016-05-03                       BN_mod_inverse(3SSL)