|BN_CTX_NEW(3)||Library Functions Manual||BN_CTX_NEW(3)|
— allocate and free BN_CTX structures
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.
allocates and initializes a BN_CTX structure.
frees the components of the BN_CTX and, if it was
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(). If c is a
NULL pointer, no action occurs.
(deprecated) initializes an existing uninitialized
BN_CTX. This should not be used for new programs. Use
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
BN_CTX_free() are available in all versions of
SSLeay and OpenSSL.
BN_CTX_init() was added in
|December 10, 2016||OpenBSD-6.1|