BN_CTX_new - allocate and free BN_CTX structures
#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);
BN_CTX_new(3openssl) OpenSSL BN_CTX_new(3openssl)
NAME
BN_CTX_new, BN_CTX_init, BN_CTX_free - allocate and free BN_CTX
structures
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() have no return values.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+--------------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+--------------------------+
|Availability | library/security/openssl |
+---------------+--------------------------+
|Stability | Pass-through uncommitted |
+---------------+--------------------------+
SEE ALSO
bn(3), ERR_get_error(3), BN_add(3), BN_CTX_start(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.
NOTES
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from
https://www.openssl.org/source/openssl-1.0.2ze.tar.gz.
Further information about this software can be found on the open source
community website at https://www.openssl.org/.
1.0.2ze 2022-05-03 BN_CTX_new(3openssl)