BUF_MEM_NEW - Online Linux Manual PageSection : 3
Updated : 2021-03-26
Source : 1.1.1k
Note : OpenSSL
NAMEBUF_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);
DESCRIPTIONThe 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.
RETURN VALUES​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).
SEE ALSO​bio (7), ​CRYPTO_secure_malloc (3).
HISTORYThe BUF_MEM_new_ex() function was added in OpenSSL 1.1.0.
COPYRIGHTCopyright 2000−2018 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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