5 BN_rand - Generate pseudo-random number
9 #include <openssl/bn.h>
11 int BN_rand(BIGNUM *rnd, int bits, int top, int bottom);
15 BN_rand() generates a cryptographically strong pseudo-random number of
16 B<bits> bits in length and stores it in B<rnd>. If B<top> is true, the
17 two most significant bits of the number will be set to 1, so that the
18 product of two such random numbers will always have 2*B<bits> length.
19 If B<bottom> is true, the number will be odd.
21 The PRNG must be seeded prior to calling BN_rand().
25 BN_rand() returns 1 on success, 0 on error.
26 The error codes can be obtained by ERR_get_error(3).
30 bn(3), err(3), rand(3), RAND_add(), RAND_bytes()
34 BN_rand() is available in all versions of SSLeay and OpenSSL.