BUF_MEM_NEW(3ossl) OpenSSL BUF_MEM_NEW(3ossl)
NAME
BUF_MEM_new, BUF_MEM_new_ex, BUF_MEM_free, BUF_MEM_grow,
BUF_MEM_grow_clean, BUF_reverse - simple character array structure
SYNOPSIS
#include <openssl/buffer.h>
BUF_MEM *BUF_MEM_new(void);
BUF_MEM *BUF_MEM_new_ex(unsigned long flags);
void BUF_MEM_free(BUF_MEM *a);
int BUF_MEM_grow(BUF_MEM *str, int len);
size_t BUF_MEM_grow_clean(BUF_MEM *str, size_t len);
void BUF_reverse(unsigned char *out, const unsigned char *in, size_t size);
DESCRIPTION
The buffer library handles simple character arrays. Buffers are used
for various purposes in the library, most notably memory BIOs.
BUF_MEM_new(3) allocates a new buffer of zero size.
BUF_MEM_new_ex() allocates a buffer with the specified flags. The flag
BUF_MEM_FLAG_SECURE specifies that the data pointer should be allocated
on the secure heap; see CRYPTO_secure_malloc(3).
BUF_MEM_free() frees up an already existing buffer. The data is zeroed
before freeing up in case the buffer contains sensitive data. If the
argument is NULL, nothing is done.
BUF_MEM_grow() changes the size of an already existing buffer to len.
Any data already in the buffer is preserved if it increases in size.
BUF_MEM_grow_clean() is similar to BUF_MEM_grow() but it sets any
free'd or additionally-allocated memory to zero.
BUF_reverse() reverses size bytes at in into out. If in is NULL, the
array is reversed in-place.
RETURN VALUES
BUF_MEM_new(3) returns the buffer or NULL on error.
BUF_MEM_free() has no return value.
BUF_MEM_grow() and BUF_MEM_grow_clean() return zero on error or the new
size (i.e., len).
SEE ALSO
bio(7), CRYPTO_secure_malloc(3).
HISTORY
The BUF_MEM_new_ex() function was added in OpenSSL 1.1.0.
COPYRIGHT
Copyright 2000-2024 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (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>.
3.3.2 2024-09-04 BUF_MEM_NEW(3ossl)
openssl 3.3.2 - Generated Sat Sep 7 12:42:00 CDT 2024