BN_rand_range_ex

Generate a cryptographically strong uniform random BIGNUM in [0, range).]

Synopsis

Declared in <openssl/bn.h>

int
BN_rand_range_ex(
    BIGNUM* r,
    BIGNUM const* range,
    unsigned int strength,
    BN_CTX* ctx);

Return Value

1 on success, or 0 on error.

Parameters

NameDescription
rDestination for the random value.
rangeExclusive upper bound; must be positive.
strengthDesired security strength in bits for the RNG draw.
ctxBN_CTX for temporary storage, or NULL.