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

Name

Description

r

Destination for the random value.

range

Exclusive upper bound; must be positive.

strength

Desired security strength in bits for the RNG draw.

ctx

BN_CTX for temporary storage, or NULL.

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