BN_CTX_free

BN_CTX_new(3)			   OpenSSL			BN_CTX_new(3)



NAME
       BN_CTX_new, BN_CTX_init, BN_CTX_free - allocate and free BN_CTX struc-
       tures

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 BIGNUMs
       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 cre-
       ated 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.



0.9.7a				  2002-09-25			BN_CTX_new(3)