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EVP_CIPHER_CTX_GET_CIPHER_DATA(3) OpenSSL EVP_CIPHER_CTX_GET_CIPHER_DATA(3)
NAME
EVP_CIPHER_CTX_get_cipher_data, EVP_CIPHER_CTX_set_cipher_data -
Routines to inspect and modify EVP_CIPHER_CTX objects
SYNOPSIS
#include <openssl/evp.h>
void *EVP_CIPHER_CTX_get_cipher_data(const EVP_CIPHER_CTX *ctx);
void *EVP_CIPHER_CTX_set_cipher_data(EVP_CIPHER_CTX *ctx, void *cipher_data);
DESCRIPTION
The EVP_CIPHER_CTX_get_cipher_data() function returns a pointer to the
cipher data relevant to EVP_CIPHER_CTX. The contents of this data is
specific to the particular implementation of the cipher. For example
this data can be used by engines to store engine specific information.
The data is automatically allocated and freed by OpenSSL, so
applications and engines should not normally free this directly (but
see below).
The EVP_CIPHER_CTX_set_cipher_data() function allows an application or
engine to replace the cipher data with new data. A pointer to any
existing cipher data is returned from this function. If the old data is
no longer required then it should be freed through a call to
OPENSSL_free().
RETURN VALUES
The EVP_CIPHER_CTX_get_cipher_data() function returns a pointer to the
current cipher data for the EVP_CIPHER_CTX.
The EVP_CIPHER_CTX_set_cipher_data() function returns a pointer to the
old cipher data for the EVP_CIPHER_CTX.
HISTORY
The EVP_CIPHER_CTX_get_cipher_data() and
EVP_CIPHER_CTX_set_cipher_data() functions were added in OpenSSL 1.1.0.
COPYRIGHT
Copyright 2016 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>.
1.1.1v 2023-08-01 EVP_CIPHER_CTX_GET_CIPHER_DATA(3)