5 BN_CTX_new, BN_CTX_init, BN_CTX_free - allocate and free BN_CTX structures
9 #include <openssl/bn.h>
11 BN_CTX *BN_CTX_new(void);
13 void BN_CTX_init(BN_CTX *c);
15 void BN_CTX_free(BN_CTX *c);
19 A B<BN_CTX> is a structure that holds temporary variables used by
20 library functions. Thus, it can be avoided to create and destroy
21 the temporary B<BIGNUM> objects whenever a library function is
24 BN_CTX_new() allocated and initializes a B<BN_CTX>
25 structure. BN_CTX_init() initializes an existing uninitialized
28 BN_CTX_free() frees the components of the B<BN_CTX>, and if it was
29 created by BN_CTX_new(), also the structure itself.
33 BN_CTX_new() returns a pointer to the B<BN_CTX>. If the allocation fails,
34 it returns B<NULL> and sets an error code that can be obtained by
37 BN_CTX_init() and BN_CTX_free() have no return values.
41 bn(3), err(3), BN_add(3)
45 BN_CTX_new() and BN_CTX_free() are availabe in all versions on SSLeay
46 and OpenSSL. BN_CTX_init() was added in SSLeay 0.9.1b.