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@xxxxxxxxxxxxxxxx>
---
net/mac80211/aes_ccm.c | 21 ++++++++++++---------
net/mac80211/aes_ccm.h | 10 +++++++---
net/mac80211/cfg.c | 2 ++
net/mac80211/debugfs_key.c | 3 +++
net/mac80211/key.c | 27 ++++++++++++++++++++++++++-
net/mac80211/main.c | 6 ++++--
net/mac80211/rx.c | 13 ++++++++++---
net/mac80211/tx.c | 5 ++++-
net/mac80211/wpa.c | 24 ++++++++++++++----------
net/mac80211/wpa.h | 4 ++--
10 files changed, 84 insertions(+), 31 deletions(-)
diff --git a/net/mac80211/aes_ccm.c b/net/mac80211/aes_ccm.c
index 09d9caa..7869bb4 100644
--- a/net/mac80211/aes_ccm.c
+++ b/net/mac80211/aes_ccm.c
@@ -20,7 +20,8 @@
#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)
+ u8 *data, size_t data_len, u8 *mic,
+ size_t mic_len)
{
struct scatterlist assoc, pt, ct[2];
@@ -35,7 +36,7 @@ void ieee80211_aes_ccm_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad,
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);
+ sg_set_buf(&ct[1], mic, mic_len);
aead_request_set_tfm(aead_req, tfm);
aead_request_set_assoc(aead_req, &assoc, assoc.length);
@@ -45,7 +46,8 @@ void ieee80211_aes_ccm_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad,
}
int ieee80211_aes_ccm_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad,
- u8 *data, size_t data_len, u8 *mic)
+ 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) +
@@ -62,17 +64,18 @@ int ieee80211_aes_ccm_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad,
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);
+ 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 + IEEE80211_CCMP_MIC_LEN, b_0);
+ 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[])
+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;
@@ -81,9 +84,9 @@ struct crypto_aead *ieee80211_aes_key_setup_encrypt(const u8 key[])
if (IS_ERR(tfm))
return tfm;
- err = crypto_aead_setkey(tfm, key, WLAN_KEY_LEN_CCMP);
+ err = crypto_aead_setkey(tfm, key, key_len);
if (!err)
- err = crypto_aead_setauthsize(tfm, IEEE80211_CCMP_MIC_LEN);
+ err = crypto_aead_setauthsize(tfm, mic_len);
if (!err)
return tfm;
diff --git a/net/mac80211/aes_ccm.h b/net/mac80211/aes_ccm.h
index 2c7ab19..6a73d1e 100644
--- a/net/mac80211/aes_ccm.h
+++ b/net/mac80211/aes_ccm.h
@@ -12,11 +12,15 @@
#include <linux/crypto.h>
-struct crypto_aead *ieee80211_aes_key_setup_encrypt(const u8 key[]);
+struct crypto_aead *ieee80211_aes_key_setup_encrypt(const u8 key[],
+ size_t key_len,
+ size_t mic_len);
void ieee80211_aes_ccm_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad,
- u8 *data, size_t data_len, u8 *mic);
+ 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,
- u8 *data, size_t data_len, u8 *mic);
+ u8 *data, size_t data_len, u8 *mic,
+ size_t mic_len);
void ieee80211_aes_key_free(struct crypto_aead *tfm);
#endif /* AES_CCM_H */
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 1c1d061..ef84441 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -162,6 +162,7 @@ static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
return -EINVAL;
break;
case WLAN_CIPHER_SUITE_CCMP:
+ case WLAN_CIPHER_SUITE_CCMP_256:
case WLAN_CIPHER_SUITE_AES_CMAC:
case WLAN_CIPHER_SUITE_GCMP:
case WLAN_CIPHER_SUITE_GCMP_256:
@@ -349,6 +350,7 @@ static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
params.seq_len = 6;
break;
case WLAN_CIPHER_SUITE_CCMP:
+ case WLAN_CIPHER_SUITE_CCMP_256:
pn64 = atomic64_read(&key->u.ccmp.tx_pn);
seq[0] = pn64;
seq[1] = pn64 >> 8;
diff --git a/net/mac80211/debugfs_key.c b/net/mac80211/debugfs_key.c
index 0e223e6..64de07b 100644
--- a/net/mac80211/debugfs_key.c
+++ b/net/mac80211/debugfs_key.c
@@ -94,6 +94,7 @@ static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf,
key->u.tkip.tx.iv16);
break;
case WLAN_CIPHER_SUITE_CCMP:
+ case WLAN_CIPHER_SUITE_CCMP_256:
pn = atomic64_read(&key->u.ccmp.tx_pn);
len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
(u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24),
@@ -141,6 +142,7 @@ static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf,
len = p - buf;
break;
case WLAN_CIPHER_SUITE_CCMP:
+ case WLAN_CIPHER_SUITE_CCMP_256:
for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
rpn = key->u.ccmp.rx_pn[i];
p += scnprintf(p, sizeof(buf)+buf-p,
@@ -185,6 +187,7 @@ static ssize_t key_replays_read(struct file *file, char __user *userbuf,
switch (key->conf.cipher) {
case WLAN_CIPHER_SUITE_CCMP:
+ case WLAN_CIPHER_SUITE_CCMP_256:
len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
break;
case WLAN_CIPHER_SUITE_AES_CMAC:
diff --git a/net/mac80211/key.c b/net/mac80211/key.c
index cbee2f5..83c6108 100644
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -163,6 +163,7 @@ static int ieee80211_key_enable_hw_accel(struct ieee80211_key *key)
case WLAN_CIPHER_SUITE_WEP104:
case WLAN_CIPHER_SUITE_TKIP:
case WLAN_CIPHER_SUITE_CCMP:
+ case WLAN_CIPHER_SUITE_CCMP_256:
case WLAN_CIPHER_SUITE_AES_CMAC:
case WLAN_CIPHER_SUITE_GCMP:
case WLAN_CIPHER_SUITE_GCMP_256:
@@ -389,7 +390,26 @@ ieee80211_key_alloc(u32 cipher, int idx, size_t key_len,
* Initialize AES key state here as an optimization so that
* it does not need to be initialized for every packet.
*/
- key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt(key_data);
+ key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt(
+ key_data, key_len, IEEE80211_CCMP_MIC_LEN);
+ if (IS_ERR(key->u.ccmp.tfm)) {
+ err = PTR_ERR(key->u.ccmp.tfm);
+ kfree(key);
+ return ERR_PTR(err);
+ }
+ break;
+ case WLAN_CIPHER_SUITE_CCMP_256:
+ key->conf.iv_len = IEEE80211_CCMP_256_HDR_LEN;
+ key->conf.icv_len = IEEE80211_CCMP_256_MIC_LEN;
+ for (i = 0; seq && i < IEEE80211_NUM_TIDS + 1; i++)
+ for (j = 0; j < IEEE80211_CCMP_256_PN_LEN; j++)
+ key->u.ccmp.rx_pn[i][j] =
+ seq[IEEE80211_CCMP_256_PN_LEN - j - 1];
+ /* Initialize AES key state here as an optimization so that
+ * it does not need to be initialized for every packet.
+ */
+ key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt(
+ key_data, key_len, IEEE80211_CCMP_256_MIC_LEN);
if (IS_ERR(key->u.ccmp.tfm)) {
err = PTR_ERR(key->u.ccmp.tfm);
kfree(key);
@@ -457,6 +477,7 @@ static void ieee80211_key_free_common(struct ieee80211_key *key)
{
switch (key->conf.cipher) {
case WLAN_CIPHER_SUITE_CCMP:
+ case WLAN_CIPHER_SUITE_CCMP_256:
ieee80211_aes_key_free(key->u.ccmp.tfm);
break;
case WLAN_CIPHER_SUITE_AES_CMAC:
@@ -773,6 +794,7 @@ void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf,
seq->tkip.iv16 = key->u.tkip.tx.iv16;
break;
case WLAN_CIPHER_SUITE_CCMP:
+ case WLAN_CIPHER_SUITE_CCMP_256:
pn64 = atomic64_read(&key->u.ccmp.tx_pn);
seq->ccmp.pn[5] = pn64;
seq->ccmp.pn[4] = pn64 >> 8;
@@ -822,6 +844,7 @@ void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf,
seq->tkip.iv16 = key->u.tkip.rx[tid].iv16;
break;
case WLAN_CIPHER_SUITE_CCMP:
+ case WLAN_CIPHER_SUITE_CCMP_256:
if (WARN_ON(tid < -1 || tid >= IEEE80211_NUM_TIDS))
return;
if (tid < 0)
@@ -864,6 +887,7 @@ void ieee80211_set_key_tx_seq(struct ieee80211_key_conf *keyconf,
key->u.tkip.tx.iv16 = seq->tkip.iv16;
break;
case WLAN_CIPHER_SUITE_CCMP:
+ case WLAN_CIPHER_SUITE_CCMP_256:
pn64 = (u64)seq->ccmp.pn[5] |
((u64)seq->ccmp.pn[4] << 8) |
((u64)seq->ccmp.pn[3] << 16) |
@@ -914,6 +938,7 @@ void ieee80211_set_key_rx_seq(struct ieee80211_key_conf *keyconf,
key->u.tkip.rx[tid].iv16 = seq->tkip.iv16;
break;
case WLAN_CIPHER_SUITE_CCMP:
+ case WLAN_CIPHER_SUITE_CCMP_256:
if (WARN_ON(tid < -1 || tid >= IEEE80211_NUM_TIDS))
return;
if (tid < 0)
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 7223b4e..a5ad2d5 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -666,6 +666,7 @@ static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
WLAN_CIPHER_SUITE_WEP104,
WLAN_CIPHER_SUITE_TKIP,
WLAN_CIPHER_SUITE_CCMP,
+ WLAN_CIPHER_SUITE_CCMP_256,
WLAN_CIPHER_SUITE_GCMP,
WLAN_CIPHER_SUITE_GCMP_256,
@@ -727,9 +728,9 @@ static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
* including the schemes)
*
* We start counting ciphers defined by schemes, TKIP, CCMP,
- * GCMP, and GCMP-256
+ * CCMP-256, GCMP, and GCMP-256
*/
- n_suites = local->hw.n_cipher_schemes + 4;
+ n_suites = local->hw.n_cipher_schemes + 5;
/* check if we have WEP40 and WEP104 */
if (have_wep)
@@ -744,6 +745,7 @@ static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
return -ENOMEM;
suites[w++] = WLAN_CIPHER_SUITE_CCMP;
+ suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
suites[w++] = WLAN_CIPHER_SUITE_TKIP;
suites[w++] = WLAN_CIPHER_SUITE_GCMP;
suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index a11d251..1bcec37 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1650,7 +1650,10 @@ ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
result = ieee80211_crypto_tkip_decrypt(rx);
break;
case WLAN_CIPHER_SUITE_CCMP:
- result = ieee80211_crypto_ccmp_decrypt(rx);
+ result = ieee80211_crypto_ccmp_decrypt(rx, false);
+ break;
+ case WLAN_CIPHER_SUITE_CCMP_256:
+ result = ieee80211_crypto_ccmp_decrypt(rx, true);
break;
case WLAN_CIPHER_SUITE_AES_CMAC:
result = ieee80211_crypto_aes_cmac_decrypt(rx);
@@ -1785,7 +1788,9 @@ ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
/* This is the first fragment of a new frame. */
entry = ieee80211_reassemble_add(rx->sdata, frag, seq,
rx->seqno_idx, &(rx->skb));
- if (rx->key && rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP &&
+ if (rx->key &&
+ (rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP ||
+ rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP_256) &&
ieee80211_has_protected(fc)) {
int queue = rx->security_idx;
/* Store CCMP PN so that we can verify that the next
@@ -1814,7 +1819,9 @@ ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
int i;
u8 pn[IEEE80211_CCMP_PN_LEN], *rpn;
int queue;
- if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP)
+ if (!rx->key ||
+ (rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP &&
+ rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP_256))
return RX_DROP_UNUSABLE;
memcpy(pn, entry->last_pn, IEEE80211_CCMP_PN_LEN);
for (i = IEEE80211_CCMP_PN_LEN - 1; i >= 0; i--) {
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index e4c6fbc..360773b 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -626,6 +626,7 @@ ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
tx->key = NULL;
break;
case WLAN_CIPHER_SUITE_CCMP:
+ case WLAN_CIPHER_SUITE_CCMP_256:
case WLAN_CIPHER_SUITE_GCMP:
case WLAN_CIPHER_SUITE_GCMP_256:
if (!ieee80211_is_data_present(hdr->frame_control) &&
@@ -1013,7 +1014,9 @@ ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
case WLAN_CIPHER_SUITE_TKIP:
return ieee80211_crypto_tkip_encrypt(tx);
case WLAN_CIPHER_SUITE_CCMP:
- return ieee80211_crypto_ccmp_encrypt(tx);
+ return ieee80211_crypto_ccmp_encrypt(tx, false);
+ case WLAN_CIPHER_SUITE_CCMP_256:
+ return ieee80211_crypto_ccmp_encrypt(tx, true);
case WLAN_CIPHER_SUITE_AES_CMAC:
return ieee80211_crypto_aes_cmac_encrypt(tx);
case WLAN_CIPHER_SUITE_GCMP:
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
index 96b65c2..1edb5f0 100644
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -394,7 +394,8 @@ static inline void ccmp_hdr2pn(u8 *pn, u8 *hdr)
}
-static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
+static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb,
+ bool ccmp256)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
struct ieee80211_key *key = tx->key;
@@ -405,6 +406,8 @@ static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
u64 pn64;
u8 aad[2 * AES_BLOCK_SIZE];
u8 b_0[AES_BLOCK_SIZE];
+ unsigned int mic_len = ccmp256 ? IEEE80211_CCMP_256_MIC_LEN :
+ IEEE80211_CCMP_MIC_LEN;
if (info->control.hw_key &&
!(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
@@ -425,7 +428,7 @@ static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
if (info->control.hw_key)
tail = 0;
else
- tail = IEEE80211_CCMP_MIC_LEN;
+ tail = mic_len;
if (WARN_ON(skb_tailroom(skb) < tail ||
skb_headroom(skb) < IEEE80211_CCMP_HDR_LEN))
@@ -460,21 +463,21 @@ static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
pos += IEEE80211_CCMP_HDR_LEN;
ccmp_special_blocks(skb, pn, b_0, aad);
ieee80211_aes_ccm_encrypt(key->u.ccmp.tfm, b_0, aad, pos, len,
- skb_put(skb, IEEE80211_CCMP_MIC_LEN));
+ skb_put(skb, mic_len), mic_len);
return 0;
}
ieee80211_tx_result
-ieee80211_crypto_ccmp_encrypt(struct ieee80211_tx_data *tx)
+ieee80211_crypto_ccmp_encrypt(struct ieee80211_tx_data *tx, bool ccmp256)
{
struct sk_buff *skb;
ieee80211_tx_set_protected(tx);
skb_queue_walk(&tx->skbs, skb) {
- if (ccmp_encrypt_skb(tx, skb) < 0)
+ if (ccmp_encrypt_skb(tx, skb, ccmp256) < 0)
return TX_DROP;
}
@@ -483,7 +486,7 @@ ieee80211_crypto_ccmp_encrypt(struct ieee80211_tx_data *tx)
ieee80211_rx_result
-ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx)
+ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx, bool ccmp256)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
int hdrlen;
@@ -493,6 +496,8 @@ ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx)
u8 pn[IEEE80211_CCMP_PN_LEN];
int data_len;
int queue;
+ unsigned int mic_len = ccmp256 ? IEEE80211_CCMP_256_MIC_LEN :
+ IEEE80211_CCMP_MIC_LEN;
hdrlen = ieee80211_hdrlen(hdr->frame_control);
@@ -500,8 +505,7 @@ ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx)
!ieee80211_is_robust_mgmt_frame(skb))
return RX_CONTINUE;
- data_len = skb->len - hdrlen - IEEE80211_CCMP_HDR_LEN -
- IEEE80211_CCMP_MIC_LEN;
+ data_len = skb->len - hdrlen - IEEE80211_CCMP_HDR_LEN - mic_len;
if (!rx->sta || data_len < 0)
return RX_DROP_UNUSABLE;
@@ -532,14 +536,14 @@ ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx)
key->u.ccmp.tfm, b_0, aad,
skb->data + hdrlen + IEEE80211_CCMP_HDR_LEN,
data_len,
- skb->data + skb->len - IEEE80211_CCMP_MIC_LEN))
+ skb->data + skb->len - mic_len, mic_len))
return RX_DROP_UNUSABLE;
}
memcpy(key->u.ccmp.rx_pn[queue], pn, IEEE80211_CCMP_PN_LEN);
/* Remove CCMP header and MIC */
- if (pskb_trim(skb, skb->len - IEEE80211_CCMP_MIC_LEN))
+ if (pskb_trim(skb, skb->len - mic_len))
return RX_DROP_UNUSABLE;
memmove(skb->data + IEEE80211_CCMP_HDR_LEN, skb->data, hdrlen);
skb_pull(skb, IEEE80211_CCMP_HDR_LEN);
diff --git a/net/mac80211/wpa.h b/net/mac80211/wpa.h
index ea955f2..ccf6c0c 100644
--- a/net/mac80211/wpa.h
+++ b/net/mac80211/wpa.h
@@ -24,9 +24,9 @@ ieee80211_rx_result
ieee80211_crypto_tkip_decrypt(struct ieee80211_rx_data *rx);
ieee80211_tx_result
-ieee80211_crypto_ccmp_encrypt(struct ieee80211_tx_data *tx);
+ieee80211_crypto_ccmp_encrypt(struct ieee80211_tx_data *tx, bool ccmp256);
ieee80211_rx_result
-ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx);
+ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx, bool ccmp256);
ieee80211_tx_result
ieee80211_crypto_aes_cmac_encrypt(struct ieee80211_tx_data *tx);
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
