mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 20:53:53 +08:00
6e1ee5d2e9
Replaced the use of a Variable Length Array In Struct (VLAIS) with a
C99 compliant equivalent. This is the original VLAIS struct.
struct {
struct aead_request req;
u8 priv[crypto_aead_reqsize(tfm)];
} aead_req;
This patch instead allocates the appropriate amount of memory using a
char array.
The new code can be compiled with both gcc and clang.
Signed-off-by: Jan-Simon Möller <dl9pf@gmx.de>
Signed-off-by: Behan Webster <behanw@converseincode.com>
[small style cleanups]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
/*
|
|
* Copyright 2003-2004, Instant802 Networks, Inc.
|
|
* Copyright 2005-2006, Devicescape Software, Inc.
|
|
*
|
|
* Rewrite: Copyright (C) 2013 Linaro Ltd <ard.biesheuvel@linaro.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/crypto.h>
|
|
#include <linux/err.h>
|
|
#include <crypto/aes.h>
|
|
|
|
#include <net/mac80211.h>
|
|
#include "key.h"
|
|
#include "aes_ccm.h"
|
|
|
|
void ieee80211_aes_ccm_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad,
|
|
u8 *data, size_t data_len, u8 *mic)
|
|
{
|
|
struct scatterlist assoc, pt, ct[2];
|
|
|
|
char aead_req_data[sizeof(struct aead_request) +
|
|
crypto_aead_reqsize(tfm)]
|
|
__aligned(__alignof__(struct aead_request));
|
|
struct aead_request *aead_req = (void *) aead_req_data;
|
|
|
|
memset(aead_req, 0, sizeof(aead_req_data));
|
|
|
|
sg_init_one(&pt, data, data_len);
|
|
sg_init_one(&assoc, &aad[2], be16_to_cpup((__be16 *)aad));
|
|
sg_init_table(ct, 2);
|
|
sg_set_buf(&ct[0], data, data_len);
|
|
sg_set_buf(&ct[1], mic, IEEE80211_CCMP_MIC_LEN);
|
|
|
|
aead_request_set_tfm(aead_req, tfm);
|
|
aead_request_set_assoc(aead_req, &assoc, assoc.length);
|
|
aead_request_set_crypt(aead_req, &pt, ct, data_len, b_0);
|
|
|
|
crypto_aead_encrypt(aead_req);
|
|
}
|
|
|
|
int ieee80211_aes_ccm_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad,
|
|
u8 *data, size_t data_len, u8 *mic)
|
|
{
|
|
struct scatterlist assoc, pt, ct[2];
|
|
char aead_req_data[sizeof(struct aead_request) +
|
|
crypto_aead_reqsize(tfm)]
|
|
__aligned(__alignof__(struct aead_request));
|
|
struct aead_request *aead_req = (void *) aead_req_data;
|
|
|
|
memset(aead_req, 0, sizeof(aead_req_data));
|
|
|
|
sg_init_one(&pt, data, data_len);
|
|
sg_init_one(&assoc, &aad[2], be16_to_cpup((__be16 *)aad));
|
|
sg_init_table(ct, 2);
|
|
sg_set_buf(&ct[0], data, data_len);
|
|
sg_set_buf(&ct[1], mic, IEEE80211_CCMP_MIC_LEN);
|
|
|
|
aead_request_set_tfm(aead_req, tfm);
|
|
aead_request_set_assoc(aead_req, &assoc, assoc.length);
|
|
aead_request_set_crypt(aead_req, ct, &pt,
|
|
data_len + IEEE80211_CCMP_MIC_LEN, b_0);
|
|
|
|
return crypto_aead_decrypt(aead_req);
|
|
}
|
|
|
|
struct crypto_aead *ieee80211_aes_key_setup_encrypt(const u8 key[])
|
|
{
|
|
struct crypto_aead *tfm;
|
|
int err;
|
|
|
|
tfm = crypto_alloc_aead("ccm(aes)", 0, CRYPTO_ALG_ASYNC);
|
|
if (IS_ERR(tfm))
|
|
return tfm;
|
|
|
|
err = crypto_aead_setkey(tfm, key, WLAN_KEY_LEN_CCMP);
|
|
if (!err)
|
|
err = crypto_aead_setauthsize(tfm, IEEE80211_CCMP_MIC_LEN);
|
|
if (!err)
|
|
return tfm;
|
|
|
|
crypto_free_aead(tfm);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
void ieee80211_aes_key_free(struct crypto_aead *tfm)
|
|
{
|
|
crypto_free_aead(tfm);
|
|
}
|