5 BUF_MEM_new, BUF_MEM_new_ex, BUF_MEM_free, BUF_MEM_grow - simple
6 character array structure
8 standard C library equivalents
12 #include <openssl/buffer.h>
14 BUF_MEM *BUF_MEM_new(void);
16 #define BUF_MEM_FLAG_SECURE
18 BUF_MEM *BUF_MEM_new_ex(unsigned long flags);
20 void BUF_MEM_free(BUF_MEM *a);
22 int BUF_MEM_grow(BUF_MEM *str, int len);
26 The buffer library handles simple character arrays. Buffers are used for
27 various purposes in the library, most notably memory BIOs.
29 BUF_MEM_new() allocates a new buffer of zero size.
31 BUF_MEM_new_ex() allocates a buffer with the specified flags.
32 The flag B<BUF_MEM_FLAG_SECURE> specifies that the B<data> pointer
33 should be allocated on the secure heap; see L<CRYPTO_secure_malloc(3)>.
35 BUF_MEM_free() frees up an already existing buffer. The data is zeroed
36 before freeing up in case the buffer contains sensitive data.
38 BUF_MEM_grow() changes the size of an already existing buffer to
39 B<len>. Any data already in the buffer is preserved if it increases in
44 BUF_MEM_new() returns the buffer or NULL on error.
46 BUF_MEM_free() has no return value.
48 BUF_MEM_grow() returns zero on error or the new size (i.e. B<len>).
53 L<CRYPTO_secure_malloc(3)>.
57 BUF_MEM_new_ex() was added in OpenSSL 1.1.0.
61 Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
63 Licensed under the OpenSSL license (the "License"). You may not use
64 this file except in compliance with the License. You can obtain a copy
65 in the file LICENSE in the source distribution or at
66 L<https://www.openssl.org/source/license.html>.