path: root/doc/crypto/BN_zero.pod
diff options
authorSimon L. B. Nielsen <simon@FreeBSD.org>2008-08-23 10:51:00 +0000
committerSimon L. B. Nielsen <simon@FreeBSD.org>2008-08-23 10:51:00 +0000
commitc4a78426bef17a0a7c81195c2b2399e7441f14ad (patch)
tree596c39f00d5968b1519e8cd7f0546412b14c20f0 /doc/crypto/BN_zero.pod
parenta0ddfe4e7233d81e88a86217b7653708db2720fa (diff)
Flatten OpenSSL vendor tree.
Notes: svn path=/vendor-crypto/openssl/dist/; revision=182044
Diffstat (limited to 'doc/crypto/BN_zero.pod')
1 files changed, 59 insertions, 0 deletions
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+=head1 NAME
+BN_zero, BN_one, BN_value_one, BN_set_word, BN_get_word - BIGNUM assignment
+=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);
+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
+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