BN_CTX_free man page on Archlinux
BN_CTX_new(3) OpenSSL BN_CTX_new(3)
BN_CTX_new, BN_CTX_init, BN_CTX_free - allocate and free BN_CTX
void BN_CTX_init(BN_CTX *c);
void BN_CTX_free(BN_CTX *c);
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 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().
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_init() and BN_CTX_free() have no return values.
bn(3), ERR_get_error(3), BN_add(3), BN_CTX_start(3)
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.
1.0.1g 2014-03-17 BN_CTX_new(3)
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