@ -1,270 +1,388 @@
--- 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
- select BPAUTO_CRYPTO_CCM
- depends on CRYPTO_GCM
depends on CRYPTO_CMAC
depends on CRC32
---help---
--- a/net/mac80211/Makefile
+++ b/net/mac80211/Makefile
@@ -16,9 +16,7 @@ mac80211-y := \
@@ -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_gcm.o \
+ aes_ccm.o \
aes_cmac.o \
- aes_gmac.o \
fils_aead.o \
cfg.o \
ethtool.o \
--- a/net/mac80211/aes_ccm.c
+++ b/net/mac80211/aes_ccm.c
@@ -13,103 +13,132 @@
#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"
-int 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)
+static void aes_ccm_prepare(struct crypto_cipher *tfm, u8 *b_0, u8 *aad, u8 *s_0,
+ u8 *a, u8 *b)
{
--- 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;
+ int i;
- aead_req = kzalloc(reqsize + CCM_AAD_LEN, GFP_ATOMIC);
-
- aead_req = kzalloc(reqsize + aad_len, GFP_ATOMIC);
- if (!aead_req)
- return -ENOMEM;
+ crypto_cipher_encrypt_one(tfm, b, b_0);
-
- __aad = (u8 *)aead_req + reqsize;
- memcpy(__aad, aad, CCM_AAD_LEN);
+ /* 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);
- memcpy(__aad, aad, aad_len);
-
- sg_init_table(sg, 3);
- sg_set_buf(&sg[0], &__aad[2], be16_to_cpup((__be16 *)__aad) );
- sg_set_buf(&sg[0], __aad, aad_len);
- sg_set_buf(&sg[1], data, data_len);
- sg_set_buf(&sg[2], mic, mic_len);
+ aad += AES_BLOCK_SIZE;
-
- 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);
+ for (i = 0; i < AES_BLOCK_SIZE; i++)
+ aad[i] ^= b[i];
+ crypto_cipher_encrypt_one(tfm, a, aad);
-
- crypto_aead_encrypt(aead_req);
- kzfree(aead_req);
+ /* Mask out bits from auth-only-b_0 */
+ b_0[0] &= 0x07;
-
- return 0;
+ /* 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);
}
-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)
+
+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 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;
+ 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;
-
- if (data_len == 0)
- return -EINVAL;
+ 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);
- aead_req = kzalloc(reqsize + CCM_AAD_LEN, GFP_ATOMIC);
-
- aead_req = kzalloc(reqsize + aad_len, GFP_ATOMIC);
- if (!aead_req)
- return -ENOMEM;
+ /* 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;
-
- __aad = (u8 *)aead_req + reqsize;
- memcpy(__aad, aad, CCM_AAD_LEN);
+ /* Authentication followed by encryption */
+ for (i = 0; i < blen; i++)
+ b[i] ^= pos[i];
+ crypto_cipher_encrypt_one(tfm, b, b);
- memcpy(__aad, aad, aad_len);
-
- sg_init_table(sg, 3);
- sg_set_buf(&sg[0], &__aad[2], be16_to_cpup((__be16 *)__aad) );
- sg_set_buf(&sg[0], __aad, aad_len);
- sg_set_buf(&sg[1], data, data_len);
- sg_set_buf(&sg[2], mic, mic_len);
+ 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];
+ }
-
- 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);
+ for (i = 0; i < mic_len; i++)
+ mic[i] = b[i] ^ s_0[i];
+}
-
- err = crypto_aead_decrypt(aead_req);
- kzfree(aead_req);
+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];
-
- return err;
+ 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_aead *ieee80211_aes_key_setup_encrypt(const u8 key[],
- size_t key_len,
- size_t mic_len)
+struct crypto_cipher *ieee80211_aes_key_setup_encrypt(const u8 key[],
+ size_t key_len,
+ size_t mic_len)
{
-}
-
-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( "ccm(aes)" , 0, CRYPTO_ALG_ASYNC);
- tfm = crypto_alloc_aead(alg, 0, CRYPTO_ALG_ASYNC);
- if (IS_ERR(tfm))
- return tfm;
+ struct crypto_cipher *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;
+ tfm = crypto_alloc_cipher("aes", 0, CRYPTO_ALG_ASYNC);
+ if (!IS_ERR(tfm))
+ crypto_cipher_setkey(tfm, key, key_len);
return tfm;
-
- return tfm;
-
-free_aead:
- crypto_free_aead(tfm);
- return ERR_PTR(err);
}
-void ieee80211_aes_key_free(struct crypto_aead *tfm)
+
+void ieee80211_aes_key_free(struct crypto_cipher *tfm)
{
-}
-
-void aead_key_free(struct crypto_aead *tfm)
-{
- crypto_free_aead(tfm);
+ crypto_free_cipher(tfm);
}
--- 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
-}
--- 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
-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)
-#include "aead_api.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);
-}
+#include <linux/crypto.h>
-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)
+{
+ return NULL;
+ 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;
+}
+
+static inline int
+ieee80211_aes_gmac(struct crypto_aead *tfm, const u8 *aad, u8 *nonce,
+ const u8 *data, size_t data_len, u8 *mic)
+int ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
+ u8 *data, size_t data_len, u8 *mic)
+{
+ return -EOPNOTSUPP;
+ 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;
+}
+
+static inline void
+ieee80211_aes_gmac_key_free(struct crypto_aead *tfm)
+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
#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 {
-#include "aead_api.h"
-
-#define GCM_AAD_LEN 32
+#include <linux/crypto.h>
-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
@ -318,7 +436,7 @@
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) , mic_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);
@ -327,7 +445,7 @@
}
@@ -537, 7 +536,7 @@ ieee80211_crypto_ccmp_decrypt(struct iee
@@ -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 */
@ -336,6 +454,13 @@
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];
@ -379,70 +504,202 @@
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
if (!ieee80211_is_mgmt(hdr->frame_control))
--- a/net/mac80211/aes_ccm.h
+++ b/net/mac80211/aes_ccm.h
@@ -12,17 +12,15 @@
#include <linux/crypto.h>
-#define CCM_AAD_LEN 32
-
-struct crypto_aead *ieee80211_aes_key_setup_encrypt(const u8 key[],
- size_t key_len,
- size_t mic_len);
-int 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);
-int ieee80211_aes_ccm_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad,
+struct crypto_cipher *ieee80211_aes_key_setup_encrypt(const u8 key[],
+ size_t key_len,
+ size_t mic_len);
--- /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);
+ 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);
-void ieee80211_aes_key_free(struct crypto_aead *tfm);
+void ieee80211_aes_key_free(struct crypto_cipher *tfm);
#endif /* AES_CCM_H */
--- a/net/mac80211/aes_gcm.h
+++ b/net/mac80211/aes_gcm.h
@@ -11,14 +11,28 @@
#include <linux/crypto.h>
-#define GCM_AAD_LEN 32
+static inline void
+ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
+ u8 *data, size_t data_len, u8 *mic)
+ 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;
+}
-int ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
- u8 *data, size_t data_len, u8 *mic);
-int ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
- u8 *data, size_t data_len, u8 *mic);
-struct crypto_aead *ieee80211_aes_gcm_key_setup_encrypt(const u8 key[],
- size_t key_len);
-void ieee80211_aes_gcm_key_free(struct crypto_aead *tfm);
+static inline int
+ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
+ u8 *data, size_t data_len, u8 *mic)
+
+struct crypto_cipher *ieee80211_aes_key_setup_encrypt(const u8 key[],
+ size_t key_len,
+ size_t mic_len)
+{
+ return -EOPNOTSUPP;
+ 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_gcm_key_setup_encrypt(const u8 key[], size_t key_len)
+ieee80211_aes_g ma c_key_setup(const u8 key[], size_t key_len)
+{
+ return NULL;
+ 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_gcm_key_free(struct crypto_aead *tfm)
+ieee80211_aes_g ma c_key_free(struct crypto_aead *tfm)
+{
+}
#endif /* AES_GCM_H */
#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 {
Felix Fietkau
7 years ago