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BUF_MEM_new(3) OpenSSL BUF_MEM_new(3) NAME BUF_MEM_new, BUF_MEM_new_ex, BUF_MEM_free, BUF_MEM_grow, BUF_MEM_grow_clean, BUF_reverse - simple character array structure LIBRARY libcrypto, -lcrypto 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() 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). HISTORY BUF_MEM_new_ex() was added in OpenSSL 1.1.0. COPYRIGHT Copyright 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>. 1.1.1 2018-09-17 BUF_MEM_new(3)