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Manpages BN_mod_inverseSection: OpenSSL (3ssl)Updated: 0.9.6c Index Return to Main Contents NAMEBN_mod_inverse - compute inverse modulo nSYNOPSIS
#include <openssl/bn.h> BIGNUM *BN_mod_inverse(BIGNUM *r, BIGNUM *a, const BIGNUM *n, BN_CTX *ctx); DESCRIPTIONBN_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 VALUESBN_mod_inverse() returns the BIGNUM containing the inverse, and NULL on error. The error codes can be obtained by ERR_get_error(3).SEE ALSObn(3), err(3), BN_add(3)HISTORYBN_mod_inverse() is available in all versions of SSLeay and OpenSSL.
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