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// SPDX-License-Identifier: GPL-2.0+
/*
* PKCS7 helper functions
*
* Copyright (c) 2012 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*/
#include <linux/kernel.h>
#include <linux/err.h>
#include <crypto/pkcs7_parser.h>
/**
* pkcs7_get_content_data - Get access to the PKCS#7 content
* @pkcs7: The preparsed PKCS#7 message to access
* @_data: Place to return a pointer to the data
* @_data_len: Place to return the data length
* @_headerlen: Size of ASN.1 header not included in _data
*
* Get access to the data content of the PKCS#7 message. The size of the
* header of the ASN.1 object that contains it is also provided and can be used
* to adjust *_data and *_data_len to get the entire object.
*
* Returns -ENODATA if the data object was missing from the message.
*/
int pkcs7_get_content_data(const struct pkcs7_message *pkcs7,
const void **_data, size_t *_data_len,
size_t *_headerlen)
{
if (!pkcs7->data)
return -ENODATA;
*_data = pkcs7->data;
*_data_len = pkcs7->data_len;
if (_headerlen)
*_headerlen = pkcs7->data_hdrlen;
return 0;
}
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