table of contents
BN_mod_inverse(3) | OpenSSL | BN_mod_inverse(3) |
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¶
HISTORY¶
BN_mod_inverse() is available in all versions of SSLeay and OpenSSL.
2017-01-26 | 1.0.2k |