+++ /dev/null
-=pod
-
-=head1 NAME
-
-BN_rand, BN_pseudo_rand, BN_rand_range, BN_pseudo_rand_range - generate pseudo-random number
-
-=head1 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);
-
-=head1 DESCRIPTION
-
-BN_rand() generates a cryptographically strong pseudo-random number of
-B<bits> in length and stores it in B<rnd>.
-If B<bits> is less than zero, or too small to
-accomodate the requirements specified by the B<top> and B<bottom>
-parameters, an error is returned.
-The B<top> parameters specifies
-requirements on the most significant bit of the generated number.
-If it is B<BN_RAND_TOP_ANY>, there is no constraint.
-If it is B<BN_RAND_TOP_ONE>, the top bit must be one.
-If it is B<BN_RAND_TOP_TWO>, 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*B<bits> length.
-If B<bottom> is B<BN_RAND_BOTTOM_ODD>, the number will be odd; if it
-is B<BN_RAND_BOTTOM_ANY> it can be odd or even.
-If B<bits> is 1 then B<top> cannot also be B<BN_RAND_FLG_TOPTWO>.
-
-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 B<rnd> in the range 0 E<lt>= B<rnd> E<lt> B<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().
-
-=head1 RETURN VALUES
-
-The functions return 1 on success, 0 on error.
-The error codes can be obtained by L<ERR_get_error(3)>.
-
-=head1 SEE ALSO
-
-L<bn(3)>, L<ERR_get_error(3)>, L<rand(3)>,
-L<RAND_add(3)>, L<RAND_bytes(3)>
-
-=head1 COPYRIGHT
-
-Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
-
-Licensed under the OpenSSL license (the "License"). You may not use
-this file except in compliance with the License. You can obtain a copy
-in the file LICENSE in the source distribution or at
-L<https://www.openssl.org/source/license.html>.
-
-=cut
projects / openssl.git / blobdiff