BN_CTX_new man page on DragonFly

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BN_CTX_NEW(3)		 BSD Library Functions Manual		 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_free(BN_CTX *c);

     Deprecated:

     void
     BN_CTX_init(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_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_init() (deprecated) initializes an existing uninitialized BN_CTX.
     This should not be used for new programs.	Use BN_CTX_new() instead.

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() return no value.

SEE ALSO
     bn(3), BN_add(3), BN_CTX_start(3), ERR_get_error(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.

BSD				March 28, 2024				   BSD
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