BN_new man page on DragonFly

BN_new man page on DragonFly

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BN_NEW(3)		 BSD Library Functions Manual		     BN_NEW(3)

NAME
     BN_new, BN_init, BN_clear, BN_free, BN_clear_free — allocate and free
     BIGNUMs

SYNOPSIS
     #include <openssl/bn.h>

     BIGNUM *
     BN_new(void);

     void
     BN_init(BIGNUM *);

     void
     BN_clear(BIGNUM *a);

     void
     BN_free(BIGNUM *a);

     void
     BN_clear_free(BIGNUM *a);

DESCRIPTION
     BN_new() allocates and initializes a BIGNUM structure.  BN_init() ini‐
     tializes an existing uninitialized BIGNUM.

     BN_clear() is used to destroy sensitive data such as keys when they are
     no longer needed.	It erases the memory used by a and sets it to the
     value 0.

     BN_free() frees the components of the BIGNUM, and if it was created by
     BN_new(), also the structure itself.  BN_clear_free() additionally over‐
     writes the data before the memory is returned to the system.

RETURN VALUES
     BN_new() returns a pointer to the BIGNUM.	If the allocation fails, it
     returns NULL and sets an error code that can be obtained by
     ERR_get_error(3).

     BN_init(), BN_clear(), BN_free(), and BN_clear_free() return no values.

SEE ALSO
     bn(3), ERR_get_error(3)

HISTORY
     BN_new(), BN_clear(), BN_free(), and BN_clear_free() are available in all
     versions on SSLeay and OpenSSL.  BN_init() was added in SSLeay 0.9.1b.

BSD				April 25, 2024				   BSD

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