개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(1M)을 검색하려면 섹션에서 1M 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

BN_rand(3)

BN_rand(3)                          OpenSSL                         BN_rand(3)



NAME
       BN_rand, BN_pseudo_rand, BN_rand_range, BN_pseudo_rand_range - generate
       pseudo-random number

SYNOPSIS
        #include <openssl/bn.h>

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

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

        int BN_rand_range(BIGNUM *rnd, BIGNUM *range);

        int BN_pseudo_rand_range(BIGNUM *rnd, BIGNUM *range);

DESCRIPTION
       BN_rand() generates a cryptographically strong pseudo-random number of
       bits in length and stores it in rnd.  If bits is less than zero, or too
       small to accomodate the requirements specified by the top and bottom
       parameters, an error is returned.  If top is -1, the most significant
       bit of the random number can be zero. If top is 0, it is set to 1, and
       if top is 1, the two most significant bits of the number will be set to
       1, so that the product of two such random numbers will always have
       2*bits length.  If bottom is true, the number will be odd. The value of
       bits must be zero or greater. If bits is 1 then top cannot also be 1.

       BN_pseudo_rand() does the same, but pseudo-random numbers generated by
       this function are not necessarily unpredictable. They can be used for
       non-cryptographic purposes and for certain purposes in cryptographic
       protocols, but usually not for key generation etc.

       BN_rand_range() generates a cryptographically strong pseudo-random
       number rnd in the range 0 <= rnd < range.  BN_pseudo_rand_range() does
       the same, but is based on BN_pseudo_rand(), and hence numbers generated
       by it are not necessarily unpredictable.

       The PRNG must be seeded prior to calling BN_rand() or BN_rand_range().

RETURN VALUES
       The functions return 1 on success, 0 on error.  The error codes can be
       obtained by ERR_get_error(3).

SEE ALSO
       bn(3), ERR_get_error(3), rand(3), RAND_add(3), RAND_bytes(3)

HISTORY
       BN_rand() is available in all versions of SSLeay and OpenSSL.
       BN_pseudo_rand() was added in OpenSSL 0.9.5. The top == -1 case and the
       function BN_rand_range() were added in OpenSSL 0.9.6a.
       BN_pseudo_rand_range() was added in OpenSSL 0.9.6c.



1.0.2l                            2017-05-25                        BN_rand(3)