forked from luck/tmp_suning_uos_patched
2b2ba0db1c
This allows mac80211 to configure CCMP-256 to the driver and also use software-implementation within mac80211 when the driver does not support this with hardware accelaration. Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com> [squash ccmp256 -> mic_len argument change] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
101 lines
2.7 KiB
C
101 lines
2.7 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,
|
|
size_t mic_len)
|
|
{
|
|
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, 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,
|
|
size_t mic_len)
|
|
{
|
|
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;
|
|
|
|
if (data_len == 0)
|
|
return -EINVAL;
|
|
|
|
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, 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 + mic_len, b_0);
|
|
|
|
return crypto_aead_decrypt(aead_req);
|
|
}
|
|
|
|
struct crypto_aead *ieee80211_aes_key_setup_encrypt(const u8 key[],
|
|
size_t key_len,
|
|
size_t mic_len)
|
|
{
|
|
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, key_len);
|
|
if (!err)
|
|
err = crypto_aead_setauthsize(tfm, 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);
|
|
}
|