Flashnux

GNU/Linux man pages

Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :

ISBN : 978-2-7460-9712-4
EAN : 9782746097124
(Editions ENI)

GNU/Linux

CentOS 5.3

BN_CTX_free(3ssl)
BN_CTX_new

BN_CTX_new

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUES
SEE ALSO
HISTORY

NAME

BN_CTX_new, BN_CTX_init, BN_CTX_free − allocate and free BN_CTX structures

SYNOPSIS 

 #include <openssl/bn.h>
 BN_CTX *BN_CTX_new(void);
 void BN_CTX_init(BN_CTX *c);
 void BN_CTX_free(BN_CTX *c);

DESCRIPTION

A BN_CTX is a structure that holds BIGNUM temporary variables used by library functions. Since dynamic memory allocation to create BIGNUM s is rather expensive when used in conjunction with repeated subroutine calls, the BN_CTX structure is used.

BN_CTX_new() allocates and initializes a BN_CTX structure. BN_CTX_init() initializes an existing uninitialized BN_CTX .

BN_CTX_free() frees the components of the BN_CTX , and if it was created by BN_CTX_new(), also the structure itself. If BN_CTX_start(3) has been used on the BN_CTX , BN_CTX_end(3) must be called before the BN_CTX may be freed by BN_CTX_free().

RETURN VALUES

BN_CTX_new() returns a pointer to the BN_CTX . If the allocation fails, it returns NULL and sets an error code that can be obtained by ERR_get_error(3).

BN_CTX_init() and BN_CTX_free() have no return values.

SEE ALSO

bn(3), ERR_get_error(3), BN_add(3), BN_CTX_start(3)

HISTORY

BN_CTX_new() and BN_CTX_free() are available in all versions on SSLeay and OpenSSL. BN_CTX_init() was added in SSLeay 0.9.1b.

BN_CTX_free(3ssl)