| BN_mod_inverse | ||
|---|---|---|
 | 179.2. Cryptographic functions |  |
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.
| |  | |
| BN_generate_prime |  | BN_mod_mul_montgomery |
| 2024-12-10 | eCosPro License |