| Current Path : /usr/src/crypto/openssl/doc/crypto/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/crypto/openssl/doc/crypto/BN_new.pod |
=pod =head1 NAME BN_new, BN_init, BN_clear, BN_free, BN_clear_free - allocate and free BIGNUMs =head1 SYNOPSIS #include <openssl/bn.h> BIGNUM *BN_new(void); void BN_init(BIGNUM *); void BN_clear(BIGNUM *a); void BN_free(BIGNUM *a); void BN_clear_free(BIGNUM *a); =head1 DESCRIPTION BN_new() allocates and initializes a B<BIGNUM> structure. BN_init() initializes an existing uninitialized B<BIGNUM>. BN_clear() is used to destroy sensitive data such as keys when they are no longer needed. It erases the memory used by B<a> and sets it to the value 0. BN_free() frees the components of the B<BIGNUM>, and if it was created by BN_new(), also the structure itself. BN_clear_free() additionally overwrites the data before the memory is returned to the system. =head1 RETURN VALUES BN_new() returns a pointer to the B<BIGNUM>. If the allocation fails, it returns B<NULL> and sets an error code that can be obtained by L<ERR_get_error(3)|ERR_get_error(3)>. BN_init(), BN_clear(), BN_free() and BN_clear_free() have no return values. =head1 SEE ALSO L<bn(3)|bn(3)>, L<ERR_get_error(3)|ERR_get_error(3)> =head1 HISTORY BN_new(), BN_clear(), BN_free() and BN_clear_free() are available in all versions on SSLeay and OpenSSL. BN_init() was added in SSLeay 0.9.1b. =cut