Compute the multiplicative inverse in GF(2ˆm): r = (1 / b) mod p.

Synopsis

Declared in <openssl/bn.h>

int
BN_GF2m_mod_inv(
    BIGNUM* r,
    BIGNUM const* b,
    BIGNUM const* p,
    BN_CTX* ctx);

Return Value

1 on success, or 0 on error.

Parameters

Name

Description

r

Destination inverse.

b

Value to invert (must be non‐zero modulo p).

p

Irreducible modulus polynomial.

ctx

BN_CTX scratch space.

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