705 lines
18 KiB
Diff
705 lines
18 KiB
Diff
--- a/net/mac80211/Makefile
|
|
+++ b/net/mac80211/Makefile
|
|
@@ -6,7 +6,6 @@ mac80211-y := \
|
|
driver-ops.o \
|
|
sta_info.o \
|
|
wep.o \
|
|
- aead_api.o \
|
|
wpa.o \
|
|
scan.o offchannel.o \
|
|
ht.o agg-tx.o agg-rx.o \
|
|
@@ -16,8 +15,8 @@ mac80211-y := \
|
|
rate.o \
|
|
michael.o \
|
|
tkip.o \
|
|
+ aes_ccm.o \
|
|
aes_cmac.o \
|
|
- aes_gmac.o \
|
|
fils_aead.o \
|
|
cfg.o \
|
|
ethtool.o \
|
|
--- a/net/mac80211/aead_api.c
|
|
+++ /dev/null
|
|
@@ -1,115 +0,0 @@
|
|
-/*
|
|
- * Copyright 2003-2004, Instant802 Networks, Inc.
|
|
- * Copyright 2005-2006, Devicescape Software, Inc.
|
|
- * Copyright 2014-2015, Qualcomm Atheros, 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/err.h>
|
|
-#include <linux/scatterlist.h>
|
|
-#include <crypto/aead.h>
|
|
-
|
|
-#include "aead_api.h"
|
|
-
|
|
-int aead_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, size_t aad_len,
|
|
- u8 *data, size_t data_len, u8 *mic)
|
|
-{
|
|
- size_t mic_len = crypto_aead_authsize(tfm);
|
|
- struct scatterlist sg[3];
|
|
- struct aead_request *aead_req;
|
|
- int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm);
|
|
- u8 *__aad;
|
|
-
|
|
- aead_req = kzalloc(reqsize + aad_len, GFP_ATOMIC);
|
|
- if (!aead_req)
|
|
- return -ENOMEM;
|
|
-
|
|
- __aad = (u8 *)aead_req + reqsize;
|
|
- memcpy(__aad, aad, aad_len);
|
|
-
|
|
- sg_init_table(sg, 3);
|
|
- sg_set_buf(&sg[0], __aad, aad_len);
|
|
- sg_set_buf(&sg[1], data, data_len);
|
|
- sg_set_buf(&sg[2], mic, mic_len);
|
|
-
|
|
- aead_request_set_tfm(aead_req, tfm);
|
|
- aead_request_set_crypt(aead_req, sg, sg, data_len, b_0);
|
|
- aead_request_set_ad(aead_req, sg[0].length);
|
|
-
|
|
- crypto_aead_encrypt(aead_req);
|
|
- kzfree(aead_req);
|
|
-
|
|
- return 0;
|
|
-}
|
|
-
|
|
-int aead_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, size_t aad_len,
|
|
- u8 *data, size_t data_len, u8 *mic)
|
|
-{
|
|
- size_t mic_len = crypto_aead_authsize(tfm);
|
|
- struct scatterlist sg[3];
|
|
- struct aead_request *aead_req;
|
|
- int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm);
|
|
- u8 *__aad;
|
|
- int err;
|
|
-
|
|
- if (data_len == 0)
|
|
- return -EINVAL;
|
|
-
|
|
- aead_req = kzalloc(reqsize + aad_len, GFP_ATOMIC);
|
|
- if (!aead_req)
|
|
- return -ENOMEM;
|
|
-
|
|
- __aad = (u8 *)aead_req + reqsize;
|
|
- memcpy(__aad, aad, aad_len);
|
|
-
|
|
- sg_init_table(sg, 3);
|
|
- sg_set_buf(&sg[0], __aad, aad_len);
|
|
- sg_set_buf(&sg[1], data, data_len);
|
|
- sg_set_buf(&sg[2], mic, mic_len);
|
|
-
|
|
- aead_request_set_tfm(aead_req, tfm);
|
|
- aead_request_set_crypt(aead_req, sg, sg, data_len + mic_len, b_0);
|
|
- aead_request_set_ad(aead_req, sg[0].length);
|
|
-
|
|
- err = crypto_aead_decrypt(aead_req);
|
|
- kzfree(aead_req);
|
|
-
|
|
- return err;
|
|
-}
|
|
-
|
|
-struct crypto_aead *
|
|
-aead_key_setup_encrypt(const char *alg, const u8 key[],
|
|
- size_t key_len, size_t mic_len)
|
|
-{
|
|
- struct crypto_aead *tfm;
|
|
- int err;
|
|
-
|
|
- tfm = crypto_alloc_aead(alg, 0, CRYPTO_ALG_ASYNC);
|
|
- if (IS_ERR(tfm))
|
|
- return tfm;
|
|
-
|
|
- err = crypto_aead_setkey(tfm, key, key_len);
|
|
- if (err)
|
|
- goto free_aead;
|
|
- err = crypto_aead_setauthsize(tfm, mic_len);
|
|
- if (err)
|
|
- goto free_aead;
|
|
-
|
|
- return tfm;
|
|
-
|
|
-free_aead:
|
|
- crypto_free_aead(tfm);
|
|
- return ERR_PTR(err);
|
|
-}
|
|
-
|
|
-void aead_key_free(struct crypto_aead *tfm)
|
|
-{
|
|
- crypto_free_aead(tfm);
|
|
-}
|
|
--- a/net/mac80211/aead_api.h
|
|
+++ /dev/null
|
|
@@ -1,27 +0,0 @@
|
|
-/*
|
|
- * 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.
|
|
- */
|
|
-
|
|
-#ifndef _AEAD_API_H
|
|
-#define _AEAD_API_H
|
|
-
|
|
-#include <crypto/aead.h>
|
|
-#include <linux/crypto.h>
|
|
-
|
|
-struct crypto_aead *
|
|
-aead_key_setup_encrypt(const char *alg, const u8 key[],
|
|
- size_t key_len, size_t mic_len);
|
|
-
|
|
-int aead_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad,
|
|
- size_t aad_len, u8 *data,
|
|
- size_t data_len, u8 *mic);
|
|
-
|
|
-int aead_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad,
|
|
- size_t aad_len, u8 *data,
|
|
- size_t data_len, u8 *mic);
|
|
-
|
|
-void aead_key_free(struct crypto_aead *tfm);
|
|
-
|
|
-#endif /* _AEAD_API_H */
|
|
--- a/net/mac80211/aes_ccm.h
|
|
+++ b/net/mac80211/aes_ccm.h
|
|
@@ -10,39 +10,17 @@
|
|
#ifndef AES_CCM_H
|
|
#define AES_CCM_H
|
|
|
|
-#include "aead_api.h"
|
|
+#include <linux/crypto.h>
|
|
|
|
-#define CCM_AAD_LEN 32
|
|
-
|
|
-static inline struct crypto_aead *
|
|
-ieee80211_aes_key_setup_encrypt(const u8 key[], size_t key_len, size_t mic_len)
|
|
-{
|
|
- return aead_key_setup_encrypt("ccm(aes)", key, key_len, mic_len);
|
|
-}
|
|
-
|
|
-static inline int
|
|
-ieee80211_aes_ccm_encrypt(struct crypto_aead *tfm,
|
|
- u8 *b_0, u8 *aad, u8 *data,
|
|
- size_t data_len, u8 *mic)
|
|
-{
|
|
- return aead_encrypt(tfm, b_0, aad + 2,
|
|
- be16_to_cpup((__be16 *)aad),
|
|
- data, data_len, mic);
|
|
-}
|
|
-
|
|
-static inline int
|
|
-ieee80211_aes_ccm_decrypt(struct crypto_aead *tfm,
|
|
- u8 *b_0, u8 *aad, u8 *data,
|
|
- size_t data_len, u8 *mic)
|
|
-{
|
|
- return aead_decrypt(tfm, b_0, aad + 2,
|
|
- be16_to_cpup((__be16 *)aad),
|
|
- data, data_len, mic);
|
|
-}
|
|
-
|
|
-static inline void ieee80211_aes_key_free(struct crypto_aead *tfm)
|
|
-{
|
|
- return aead_key_free(tfm);
|
|
-}
|
|
+struct crypto_cipher *ieee80211_aes_key_setup_encrypt(const u8 key[],
|
|
+ size_t key_len,
|
|
+ size_t mic_len);
|
|
+void ieee80211_aes_ccm_encrypt(struct crypto_cipher *tfm, u8 *b_0, u8 *aad,
|
|
+ u8 *data, size_t data_len, u8 *mic,
|
|
+ size_t mic_len);
|
|
+int ieee80211_aes_ccm_decrypt(struct crypto_cipher *tfm, u8 *b_0, u8 *aad,
|
|
+ u8 *data, size_t data_len, u8 *mic,
|
|
+ size_t mic_len);
|
|
+void ieee80211_aes_key_free(struct crypto_cipher *tfm);
|
|
|
|
#endif /* AES_CCM_H */
|
|
--- /dev/null
|
|
+++ b/net/mac80211/aes_gcm.c
|
|
@@ -0,0 +1,109 @@
|
|
+/*
|
|
+ * Copyright 2014-2015, Qualcomm Atheros, Inc.
|
|
+ *
|
|
+ * 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/err.h>
|
|
+#include <crypto/aead.h>
|
|
+
|
|
+#include <net/mac80211.h>
|
|
+#include "key.h"
|
|
+#include "aes_gcm.h"
|
|
+
|
|
+int ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
|
|
+ u8 *data, size_t data_len, u8 *mic)
|
|
+{
|
|
+ struct scatterlist sg[3];
|
|
+ struct aead_request *aead_req;
|
|
+ int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm);
|
|
+ u8 *__aad;
|
|
+
|
|
+ aead_req = kzalloc(reqsize + GCM_AAD_LEN, GFP_ATOMIC);
|
|
+ if (!aead_req)
|
|
+ return -ENOMEM;
|
|
+
|
|
+ __aad = (u8 *)aead_req + reqsize;
|
|
+ memcpy(__aad, aad, GCM_AAD_LEN);
|
|
+
|
|
+ sg_init_table(sg, 3);
|
|
+ sg_set_buf(&sg[0], &__aad[2], be16_to_cpup((__be16 *)__aad));
|
|
+ sg_set_buf(&sg[1], data, data_len);
|
|
+ sg_set_buf(&sg[2], mic, IEEE80211_GCMP_MIC_LEN);
|
|
+
|
|
+ aead_request_set_tfm(aead_req, tfm);
|
|
+ aead_request_set_crypt(aead_req, sg, sg, data_len, j_0);
|
|
+ aead_request_set_ad(aead_req, sg[0].length);
|
|
+
|
|
+ crypto_aead_encrypt(aead_req);
|
|
+ kzfree(aead_req);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+int ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
|
|
+ u8 *data, size_t data_len, u8 *mic)
|
|
+{
|
|
+ struct scatterlist sg[3];
|
|
+ struct aead_request *aead_req;
|
|
+ int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm);
|
|
+ u8 *__aad;
|
|
+ int err;
|
|
+
|
|
+ if (data_len == 0)
|
|
+ return -EINVAL;
|
|
+
|
|
+ aead_req = kzalloc(reqsize + GCM_AAD_LEN, GFP_ATOMIC);
|
|
+ if (!aead_req)
|
|
+ return -ENOMEM;
|
|
+
|
|
+ __aad = (u8 *)aead_req + reqsize;
|
|
+ memcpy(__aad, aad, GCM_AAD_LEN);
|
|
+
|
|
+ sg_init_table(sg, 3);
|
|
+ sg_set_buf(&sg[0], &__aad[2], be16_to_cpup((__be16 *)__aad));
|
|
+ sg_set_buf(&sg[1], data, data_len);
|
|
+ sg_set_buf(&sg[2], mic, IEEE80211_GCMP_MIC_LEN);
|
|
+
|
|
+ aead_request_set_tfm(aead_req, tfm);
|
|
+ aead_request_set_crypt(aead_req, sg, sg,
|
|
+ data_len + IEEE80211_GCMP_MIC_LEN, j_0);
|
|
+ aead_request_set_ad(aead_req, sg[0].length);
|
|
+
|
|
+ err = crypto_aead_decrypt(aead_req);
|
|
+ kzfree(aead_req);
|
|
+
|
|
+ return err;
|
|
+}
|
|
+
|
|
+struct crypto_aead *ieee80211_aes_gcm_key_setup_encrypt(const u8 key[],
|
|
+ size_t key_len)
|
|
+{
|
|
+ struct crypto_aead *tfm;
|
|
+ int err;
|
|
+
|
|
+ tfm = crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC);
|
|
+ if (IS_ERR(tfm))
|
|
+ return tfm;
|
|
+
|
|
+ err = crypto_aead_setkey(tfm, key, key_len);
|
|
+ if (err)
|
|
+ goto free_aead;
|
|
+ err = crypto_aead_setauthsize(tfm, IEEE80211_GCMP_MIC_LEN);
|
|
+ if (err)
|
|
+ goto free_aead;
|
|
+
|
|
+ return tfm;
|
|
+
|
|
+free_aead:
|
|
+ crypto_free_aead(tfm);
|
|
+ return ERR_PTR(err);
|
|
+}
|
|
+
|
|
+void ieee80211_aes_gcm_key_free(struct crypto_aead *tfm)
|
|
+{
|
|
+ crypto_free_aead(tfm);
|
|
+}
|
|
--- a/net/mac80211/aes_gcm.h
|
|
+++ b/net/mac80211/aes_gcm.h
|
|
@@ -9,38 +9,30 @@
|
|
#ifndef AES_GCM_H
|
|
#define AES_GCM_H
|
|
|
|
-#include "aead_api.h"
|
|
+#include <linux/crypto.h>
|
|
|
|
-#define GCM_AAD_LEN 32
|
|
-
|
|
-static inline int ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm,
|
|
- u8 *j_0, u8 *aad, u8 *data,
|
|
- size_t data_len, u8 *mic)
|
|
+static inline void
|
|
+ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
|
|
+ u8 *data, size_t data_len, u8 *mic)
|
|
{
|
|
- return aead_encrypt(tfm, j_0, aad + 2,
|
|
- be16_to_cpup((__be16 *)aad),
|
|
- data, data_len, mic);
|
|
}
|
|
|
|
-static inline int ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm,
|
|
- u8 *j_0, u8 *aad, u8 *data,
|
|
- size_t data_len, u8 *mic)
|
|
+static inline int
|
|
+ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
|
|
+ u8 *data, size_t data_len, u8 *mic)
|
|
{
|
|
- return aead_decrypt(tfm, j_0, aad + 2,
|
|
- be16_to_cpup((__be16 *)aad),
|
|
- data, data_len, mic);
|
|
+ return -EOPNOTSUPP;
|
|
}
|
|
|
|
static inline struct crypto_aead *
|
|
ieee80211_aes_gcm_key_setup_encrypt(const u8 key[], size_t key_len)
|
|
{
|
|
- return aead_key_setup_encrypt("gcm(aes)", key,
|
|
- key_len, IEEE80211_GCMP_MIC_LEN);
|
|
+ return NULL;
|
|
}
|
|
|
|
-static inline void ieee80211_aes_gcm_key_free(struct crypto_aead *tfm)
|
|
+static inline void
|
|
+ieee80211_aes_gcm_key_free(struct crypto_aead *tfm)
|
|
{
|
|
- return aead_key_free(tfm);
|
|
}
|
|
|
|
#endif /* AES_GCM_H */
|
|
--- a/net/mac80211/wpa.c
|
|
+++ b/net/mac80211/wpa.c
|
|
@@ -306,7 +306,8 @@ ieee80211_crypto_tkip_decrypt(struct iee
|
|
}
|
|
|
|
|
|
-static void ccmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *b_0, u8 *aad)
|
|
+static void ccmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *b_0, u8 *aad,
|
|
+ u16 data_len)
|
|
{
|
|
__le16 mask_fc;
|
|
int a4_included, mgmt;
|
|
@@ -336,14 +337,8 @@ static void ccmp_special_blocks(struct s
|
|
else
|
|
qos_tid = 0;
|
|
|
|
- /* In CCM, the initial vectors (IV) used for CTR mode encryption and CBC
|
|
- * mode authentication are not allowed to collide, yet both are derived
|
|
- * from this vector b_0. We only set L := 1 here to indicate that the
|
|
- * data size can be represented in (L+1) bytes. The CCM layer will take
|
|
- * care of storing the data length in the top (L+1) bytes and setting
|
|
- * and clearing the other bits as is required to derive the two IVs.
|
|
- */
|
|
- b_0[0] = 0x1;
|
|
+ /* First block, b_0 */
|
|
+ b_0[0] = 0x59; /* flags: Adata: 1, M: 011, L: 001 */
|
|
|
|
/* Nonce: Nonce Flags | A2 | PN
|
|
* Nonce Flags: Priority (b0..b3) | Management (b4) | Reserved (b5..b7)
|
|
@@ -351,6 +346,8 @@ static void ccmp_special_blocks(struct s
|
|
b_0[1] = qos_tid | (mgmt << 4);
|
|
memcpy(&b_0[2], hdr->addr2, ETH_ALEN);
|
|
memcpy(&b_0[8], pn, IEEE80211_CCMP_PN_LEN);
|
|
+ /* l(m) */
|
|
+ put_unaligned_be16(data_len, &b_0[14]);
|
|
|
|
/* AAD (extra authenticate-only data) / masked 802.11 header
|
|
* FC | A1 | A2 | A3 | SC | [A4] | [QC] */
|
|
@@ -407,7 +404,7 @@ static int ccmp_encrypt_skb(struct ieee8
|
|
u8 *pos;
|
|
u8 pn[6];
|
|
u64 pn64;
|
|
- u8 aad[CCM_AAD_LEN];
|
|
+ u8 aad[2 * AES_BLOCK_SIZE];
|
|
u8 b_0[AES_BLOCK_SIZE];
|
|
|
|
if (info->control.hw_key &&
|
|
@@ -462,9 +459,11 @@ static int ccmp_encrypt_skb(struct ieee8
|
|
return 0;
|
|
|
|
pos += IEEE80211_CCMP_HDR_LEN;
|
|
- ccmp_special_blocks(skb, pn, b_0, aad);
|
|
- return ieee80211_aes_ccm_encrypt(key->u.ccmp.tfm, b_0, aad, pos, len,
|
|
- skb_put(skb, mic_len));
|
|
+ ccmp_special_blocks(skb, pn, b_0, aad, len);
|
|
+ ieee80211_aes_ccm_encrypt(key->u.ccmp.tfm, b_0, aad, pos, len,
|
|
+ skb_put(skb, mic_len), mic_len);
|
|
+
|
|
+ return 0;
|
|
}
|
|
|
|
|
|
@@ -537,13 +536,13 @@ ieee80211_crypto_ccmp_decrypt(struct iee
|
|
u8 aad[2 * AES_BLOCK_SIZE];
|
|
u8 b_0[AES_BLOCK_SIZE];
|
|
/* hardware didn't decrypt/verify MIC */
|
|
- ccmp_special_blocks(skb, pn, b_0, aad);
|
|
+ ccmp_special_blocks(skb, pn, b_0, aad, data_len);
|
|
|
|
if (ieee80211_aes_ccm_decrypt(
|
|
key->u.ccmp.tfm, b_0, aad,
|
|
skb->data + hdrlen + IEEE80211_CCMP_HDR_LEN,
|
|
data_len,
|
|
- skb->data + skb->len - mic_len))
|
|
+ skb->data + skb->len - mic_len, mic_len))
|
|
return RX_DROP_UNUSABLE;
|
|
}
|
|
|
|
@@ -639,7 +638,7 @@ static int gcmp_encrypt_skb(struct ieee8
|
|
u8 *pos;
|
|
u8 pn[6];
|
|
u64 pn64;
|
|
- u8 aad[GCM_AAD_LEN];
|
|
+ u8 aad[2 * AES_BLOCK_SIZE];
|
|
u8 j_0[AES_BLOCK_SIZE];
|
|
|
|
if (info->control.hw_key &&
|
|
@@ -696,8 +695,10 @@ static int gcmp_encrypt_skb(struct ieee8
|
|
|
|
pos += IEEE80211_GCMP_HDR_LEN;
|
|
gcmp_special_blocks(skb, pn, j_0, aad);
|
|
- return ieee80211_aes_gcm_encrypt(key->u.gcmp.tfm, j_0, aad, pos, len,
|
|
- skb_put(skb, IEEE80211_GCMP_MIC_LEN));
|
|
+ ieee80211_aes_gcm_encrypt(key->u.gcmp.tfm, j_0, aad, pos, len,
|
|
+ skb_put(skb, IEEE80211_GCMP_MIC_LEN));
|
|
+
|
|
+ return 0;
|
|
}
|
|
|
|
ieee80211_tx_result
|
|
@@ -1121,9 +1122,9 @@ ieee80211_crypto_aes_gmac_encrypt(struct
|
|
struct ieee80211_key *key = tx->key;
|
|
struct ieee80211_mmie_16 *mmie;
|
|
struct ieee80211_hdr *hdr;
|
|
- u8 aad[GMAC_AAD_LEN];
|
|
+ u8 aad[20];
|
|
u64 pn64;
|
|
- u8 nonce[GMAC_NONCE_LEN];
|
|
+ u8 nonce[12];
|
|
|
|
if (WARN_ON(skb_queue_len(&tx->skbs) != 1))
|
|
return TX_DROP;
|
|
@@ -1169,7 +1170,7 @@ ieee80211_crypto_aes_gmac_decrypt(struct
|
|
struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
|
|
struct ieee80211_key *key = rx->key;
|
|
struct ieee80211_mmie_16 *mmie;
|
|
- u8 aad[GMAC_AAD_LEN], mic[GMAC_MIC_LEN], ipn[6], nonce[GMAC_NONCE_LEN];
|
|
+ u8 aad[20], mic[16], ipn[6], nonce[12];
|
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
|
|
|
|
if (!ieee80211_is_mgmt(hdr->frame_control))
|
|
--- /dev/null
|
|
+++ b/net/mac80211/aes_ccm.c
|
|
@@ -0,0 +1,144 @@
|
|
+/*
|
|
+ * 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/err.h>
|
|
+#include <crypto/aead.h>
|
|
+#include <crypto/aes.h>
|
|
+
|
|
+#include <net/mac80211.h>
|
|
+#include "key.h"
|
|
+#include "aes_ccm.h"
|
|
+
|
|
+static void aes_ccm_prepare(struct crypto_cipher *tfm, u8 *b_0, u8 *aad, u8 *s_0,
|
|
+ u8 *a, u8 *b)
|
|
+{
|
|
+ int i;
|
|
+
|
|
+ crypto_cipher_encrypt_one(tfm, b, b_0);
|
|
+
|
|
+ /* Extra Authenticate-only data (always two AES blocks) */
|
|
+ for (i = 0; i < AES_BLOCK_SIZE; i++)
|
|
+ aad[i] ^= b[i];
|
|
+ crypto_cipher_encrypt_one(tfm, b, aad);
|
|
+
|
|
+ aad += AES_BLOCK_SIZE;
|
|
+
|
|
+ for (i = 0; i < AES_BLOCK_SIZE; i++)
|
|
+ aad[i] ^= b[i];
|
|
+ crypto_cipher_encrypt_one(tfm, a, aad);
|
|
+
|
|
+ /* Mask out bits from auth-only-b_0 */
|
|
+ b_0[0] &= 0x07;
|
|
+
|
|
+ /* S_0 is used to encrypt T (= MIC) */
|
|
+ b_0[14] = 0;
|
|
+ b_0[15] = 0;
|
|
+ crypto_cipher_encrypt_one(tfm, s_0, b_0);
|
|
+}
|
|
+
|
|
+
|
|
+void ieee80211_aes_ccm_encrypt(struct crypto_cipher *tfm, u8 *b_0, u8 *aad,
|
|
+ u8 *data, size_t data_len, u8 *mic,
|
|
+ size_t mic_len)
|
|
+{
|
|
+ int i, j, last_len, num_blocks;
|
|
+ u8 b[AES_BLOCK_SIZE];
|
|
+ u8 s_0[AES_BLOCK_SIZE];
|
|
+ u8 e[AES_BLOCK_SIZE];
|
|
+ u8 *pos, *cpos;
|
|
+
|
|
+ num_blocks = DIV_ROUND_UP(data_len, AES_BLOCK_SIZE);
|
|
+ last_len = data_len % AES_BLOCK_SIZE;
|
|
+ aes_ccm_prepare(tfm, b_0, aad, s_0, b, b);
|
|
+
|
|
+ /* Process payload blocks */
|
|
+ pos = data;
|
|
+ cpos = data;
|
|
+ for (j = 1; j <= num_blocks; j++) {
|
|
+ int blen = (j == num_blocks && last_len) ?
|
|
+ last_len : AES_BLOCK_SIZE;
|
|
+
|
|
+ /* Authentication followed by encryption */
|
|
+ for (i = 0; i < blen; i++)
|
|
+ b[i] ^= pos[i];
|
|
+ crypto_cipher_encrypt_one(tfm, b, b);
|
|
+
|
|
+ b_0[14] = (j >> 8) & 0xff;
|
|
+ b_0[15] = j & 0xff;
|
|
+ crypto_cipher_encrypt_one(tfm, e, b_0);
|
|
+ for (i = 0; i < blen; i++)
|
|
+ *cpos++ = *pos++ ^ e[i];
|
|
+ }
|
|
+
|
|
+ for (i = 0; i < mic_len; i++)
|
|
+ mic[i] = b[i] ^ s_0[i];
|
|
+}
|
|
+
|
|
+int ieee80211_aes_ccm_decrypt(struct crypto_cipher *tfm, u8 *b_0, u8 *aad,
|
|
+ u8 *data, size_t data_len, u8 *mic,
|
|
+ size_t mic_len)
|
|
+{
|
|
+ int i, j, last_len, num_blocks;
|
|
+ u8 *pos, *cpos;
|
|
+ u8 a[AES_BLOCK_SIZE];
|
|
+ u8 b[AES_BLOCK_SIZE];
|
|
+ u8 s_0[AES_BLOCK_SIZE];
|
|
+
|
|
+ num_blocks = DIV_ROUND_UP(data_len, AES_BLOCK_SIZE);
|
|
+ last_len = data_len % AES_BLOCK_SIZE;
|
|
+ aes_ccm_prepare(tfm, b_0, aad, s_0, a, b);
|
|
+
|
|
+ /* Process payload blocks */
|
|
+ cpos = data;
|
|
+ pos = data;
|
|
+ for (j = 1; j <= num_blocks; j++) {
|
|
+ int blen = (j == num_blocks && last_len) ?
|
|
+ last_len : AES_BLOCK_SIZE;
|
|
+
|
|
+ /* Decryption followed by authentication */
|
|
+ b_0[14] = (j >> 8) & 0xff;
|
|
+ b_0[15] = j & 0xff;
|
|
+ crypto_cipher_encrypt_one(tfm, b, b_0);
|
|
+ for (i = 0; i < blen; i++) {
|
|
+ *pos = *cpos++ ^ b[i];
|
|
+ a[i] ^= *pos++;
|
|
+ }
|
|
+ crypto_cipher_encrypt_one(tfm, a, a);
|
|
+ }
|
|
+
|
|
+ for (i = 0; i < mic_len; i++) {
|
|
+ if ((mic[i] ^ s_0[i]) != a[i])
|
|
+ return -1;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+struct crypto_cipher *ieee80211_aes_key_setup_encrypt(const u8 key[],
|
|
+ size_t key_len,
|
|
+ size_t mic_len)
|
|
+{
|
|
+ struct crypto_cipher *tfm;
|
|
+
|
|
+ tfm = crypto_alloc_cipher("aes", 0, CRYPTO_ALG_ASYNC);
|
|
+ if (!IS_ERR(tfm))
|
|
+ crypto_cipher_setkey(tfm, key, key_len);
|
|
+
|
|
+ return tfm;
|
|
+}
|
|
+
|
|
+
|
|
+void ieee80211_aes_key_free(struct crypto_cipher *tfm)
|
|
+{
|
|
+ crypto_free_cipher(tfm);
|
|
+}
|
|
--- a/net/mac80211/Kconfig
|
|
+++ b/net/mac80211/Kconfig
|
|
@@ -5,8 +5,6 @@ config MAC80211
|
|
depends on CRYPTO
|
|
depends on CRYPTO_ARC4
|
|
depends on CRYPTO_AES
|
|
- depends on CRYPTO_CCM
|
|
- depends on CRYPTO_GCM
|
|
depends on CRYPTO_CMAC
|
|
depends on CRC32
|
|
---help---
|
|
--- a/net/mac80211/aes_gmac.h
|
|
+++ b/net/mac80211/aes_gmac.h
|
|
@@ -15,10 +15,22 @@
|
|
#define GMAC_MIC_LEN 16
|
|
#define GMAC_NONCE_LEN 12
|
|
|
|
-struct crypto_aead *ieee80211_aes_gmac_key_setup(const u8 key[],
|
|
- size_t key_len);
|
|
-int ieee80211_aes_gmac(struct crypto_aead *tfm, const u8 *aad, u8 *nonce,
|
|
- const u8 *data, size_t data_len, u8 *mic);
|
|
-void ieee80211_aes_gmac_key_free(struct crypto_aead *tfm);
|
|
+static inline struct crypto_aead *
|
|
+ieee80211_aes_gmac_key_setup(const u8 key[], size_t key_len)
|
|
+{
|
|
+ return NULL;
|
|
+}
|
|
+
|
|
+static inline int
|
|
+ieee80211_aes_gmac(struct crypto_aead *tfm, const u8 *aad, u8 *nonce,
|
|
+ const u8 *data, size_t data_len, u8 *mic)
|
|
+{
|
|
+ return -EOPNOTSUPP;
|
|
+}
|
|
+
|
|
+static inline void
|
|
+ieee80211_aes_gmac_key_free(struct crypto_aead *tfm)
|
|
+{
|
|
+}
|
|
|
|
#endif /* AES_GMAC_H */
|
|
--- a/net/mac80211/key.h
|
|
+++ b/net/mac80211/key.h
|
|
@@ -88,7 +88,7 @@ struct ieee80211_key {
|
|
* Management frames.
|
|
*/
|
|
u8 rx_pn[IEEE80211_NUM_TIDS + 1][IEEE80211_CCMP_PN_LEN];
|
|
- struct crypto_aead *tfm;
|
|
+ struct crypto_cipher *tfm;
|
|
u32 replays; /* dot11RSNAStatsCCMPReplays */
|
|
} ccmp;
|
|
struct {
|