You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
59 lines
1.4 KiB
59 lines
1.4 KiB
=pod |
|
|
|
=head1 NAME |
|
|
|
BN_zero, BN_one, BN_value_one, BN_set_word, BN_get_word - BIGNUM assignment |
|
operations |
|
|
|
=head1 SYNOPSIS |
|
|
|
#include <openssl/bn.h> |
|
|
|
int BN_zero(BIGNUM *a); |
|
int BN_one(BIGNUM *a); |
|
|
|
const BIGNUM *BN_value_one(void); |
|
|
|
int BN_set_word(BIGNUM *a, unsigned long w); |
|
unsigned long BN_get_word(BIGNUM *a); |
|
|
|
=head1 DESCRIPTION |
|
|
|
BN_zero(), BN_one() and BN_set_word() set B<a> to the values 0, 1 and |
|
B<w> respectively. BN_zero() and BN_one() are macros. |
|
|
|
BN_value_one() returns a B<BIGNUM> constant of value 1. This constant |
|
is useful for use in comparisons and assignment. |
|
|
|
BN_get_word() returns B<a>, if it can be represented as an unsigned |
|
long. |
|
|
|
=head1 RETURN VALUES |
|
|
|
BN_get_word() returns the value B<a>, and 0xffffffffL if B<a> cannot |
|
be represented as an unsigned long. |
|
|
|
BN_zero(), BN_one() and BN_set_word() return 1 on success, 0 otherwise. |
|
BN_value_one() returns the constant. |
|
|
|
=head1 BUGS |
|
|
|
Someone might change the constant. |
|
|
|
If a B<BIGNUM> is equal to 0xffffffffL it can be represented as an |
|
unsigned long but this value is also returned on error. |
|
|
|
=head1 SEE ALSO |
|
|
|
L<bn(3)|bn(3)>, L<BN_bn2bin(3)|BN_bn2bin(3)> |
|
|
|
=head1 HISTORY |
|
|
|
BN_zero(), BN_one() and BN_set_word() are available in all versions of |
|
SSLeay and OpenSSL. BN_value_one() and BN_get_word() were added in |
|
SSLeay 0.8. |
|
|
|
BN_value_one() was changed to return a true const BIGNUM * in OpenSSL |
|
0.9.7. |
|
|
|
=cut
|
|
|