Generate a cryptographically strong public random BIGNUM of bits bits.

Synopsis

Declared in <openssl/bn.h>

int
BN_rand(
    BIGNUM* rnd,
    int bits,
    int top,
    int bottom);

Return Value

1 on success, or 0 on failure.

Parameters

Name

Description

rnd

Destination BIGNUM (allocated/resized as needed).

bits

Desired bit length of the result.

top

BN_RAND_TOP_* controlling the most‐significant bits.

bottom

BN_RAND_BOTTOM_* controlling whether the least‐significant bit must be set.

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