BUF_MEM_new, BUF_MEM_new_ex, BUF_MEM_free, BUF_MEM_grow, BUF_MEM_grow_clean,
BUF_reverse - simple character array structure
#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);
The buffer library handles simple character arrays. Buffers are used for various
purposes in the library, most notably memory BIOs.
BUF_MEM_new() 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.
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.
BUF_MEM_new() 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).
bio(7),
CRYPTO_secure_malloc(3).
The
BUF_MEM_new_ex() function was added in OpenSSL 1.1.0.
Copyright 2000-2018 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>.