BN_NEW - Online Linux Manual PageSection : 3
Updated : 2021-03-26
Source : 1.1.1k
Note : OpenSSL
NAMEBN_new, BN_secure_new, BN_clear, BN_free, BN_clear_free − allocate and free BIGNUMs
SYNOPSIS #include <openssl/bn.h>
BIGNUM *BN_new(void);
BIGNUM *BN_secure_new(void);
void BN_clear(BIGNUM *a);
void BN_free(BIGNUM *a);
void BN_clear_free(BIGNUM *a);
DESCRIPTIONBN_new() allocates and initializes a BIGNUM structure. BN_secure_new() does the same except that the secure heap OPENSSL_secure_malloc (3) is used to store the value. 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. If a is NULL, nothing is done. BN_free() frees the components of the BIGNUM, and if it was created by BN_new(), also the structure itself. BN_clear_free() additionally overwrites the data before the memory is returned to the system. If a is NULL, nothing is done.
RETURN VALUESBN_new() and BN_secure_new() return a pointer to the BIGNUM initialised to the value 0. If the allocation fails, they return NULL and set an error code that can be obtained by ERR_get_error (3). BN_clear(), BN_free() and BN_clear_free() have no return values.
SEE ALSOERR_get_error (3), OPENSSL_secure_malloc (3)
HISTORYBN_init() was removed in OpenSSL 1.1.0; use BN_new() instead.
COPYRIGHTCopyright 2000−2019 The OpenSSL Project Authors. All Rights Reserved. Licensed under the OpenSSL license (the ‟License”). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>. 0
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