BN_mod_exp

Compute modular exponentiation: r = (a ^ p) mod m.

Synopsis

Declared in <openssl/bn.h>

int
BN_mod_exp(
    BIGNUM* r,
    BIGNUM const* a,
    BIGNUM const* p,
    BIGNUM const* m,
    BN_CTX* ctx);

Return Value

1 on success, or 0 on error.

Parameters

NameDescription
rDestination for the result.
aBase.
pExponent.
mModulus; must be non-zero.
ctxBN_CTX for temporary storage.