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-=pod
-
-=head1 NAME
-
-BN_CTX_new, BN_CTX_init, BN_CTX_free - allocate and free BN_CTX structures
-
-=head1 SYNOPSIS
-
- #include <openssl/bn.h>
-
- BN_CTX *BN_CTX_new(void);
-
- void BN_CTX_free(BN_CTX *c);
-
-Deprecated:
-
- void BN_CTX_init(BN_CTX *c);
-
-
-=head1 DESCRIPTION
-
-A B<BN_CTX> is a structure that holds B<BIGNUM> temporary variables used by
-library functions. Since dynamic memory allocation to create B<BIGNUM>s
-is rather expensive when used in conjunction with repeated subroutine
-calls, the B<BN_CTX> structure is used.
-
-BN_CTX_new() allocates and initializes a B<BN_CTX>
-structure.
-
-BN_CTX_free() frees the components of the B<BN_CTX>, and if it was
-created by BN_CTX_new(), also the structure itself.
-If L<BN_CTX_start(3)|BN_CTX_start(3)> has been used on the B<BN_CTX>,
-L<BN_CTX_end(3)|BN_CTX_end(3)> must be called before the B<BN_CTX>
-may be freed by BN_CTX_free().
-
-BN_CTX_init() (deprecated) initializes an existing uninitialized B<BN_CTX>.
-This should not be used for new programs. Use BN_CTX_new() instead.
-
-=head1 RETURN VALUES
-
-BN_CTX_new() returns a pointer to the B<BN_CTX>. If the allocation fails,
-it returns B<NULL> and sets an error code that can be obtained by
-L<ERR_get_error(3)|ERR_get_error(3)>.
-
-BN_CTX_init() and BN_CTX_free() have no return values.
-
-=head1 SEE ALSO
-
-L<bn(3)|bn(3)>, L<ERR_get_error(3)|ERR_get_error(3)>, L<BN_add(3)|BN_add(3)>,
-L<BN_CTX_start(3)|BN_CTX_start(3)>
-
-=head1 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.
-
-=cut