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Diffstat (limited to 'net/mac80211/wpa.c')
-rw-r--r--net/mac80211/wpa.c148
1 files changed, 30 insertions, 118 deletions
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
index 40d5d9e48479..4a858112e4ef 100644
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -828,12 +828,14 @@ static inline void bip_ipn_swap(u8 *d, const u8 *s)
ieee80211_tx_result
-ieee80211_crypto_aes_cmac_encrypt(struct ieee80211_tx_data *tx)
+ieee80211_crypto_aes_cmac_encrypt(struct ieee80211_tx_data *tx,
+ unsigned int mic_len)
{
struct sk_buff *skb;
struct ieee80211_tx_info *info;
struct ieee80211_key *key = tx->key;
- struct ieee80211_mmie *mmie;
+ struct ieee80211_mmie_var *mmie;
+ size_t mmie_len;
u8 aad[20];
u64 pn64;
@@ -848,60 +850,14 @@ ieee80211_crypto_aes_cmac_encrypt(struct ieee80211_tx_data *tx)
!(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIE))
return TX_CONTINUE;
- if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
- return TX_DROP;
-
- mmie = skb_put(skb, sizeof(*mmie));
- mmie->element_id = WLAN_EID_MMIE;
- mmie->length = sizeof(*mmie) - 2;
- mmie->key_id = cpu_to_le16(key->conf.keyidx);
-
- /* PN = PN + 1 */
- pn64 = atomic64_inc_return(&key->conf.tx_pn);
-
- bip_ipn_set64(mmie->sequence_number, pn64);
-
- if (info->control.hw_key)
- return TX_CONTINUE;
-
- bip_aad(skb, aad);
-
- /*
- * MIC = AES-128-CMAC(IGTK, AAD || Management Frame Body || MMIE, 64)
- */
- ieee80211_aes_cmac(key->u.aes_cmac.tfm, aad,
- skb->data + 24, skb->len - 24, mmie->mic);
-
- return TX_CONTINUE;
-}
-
-ieee80211_tx_result
-ieee80211_crypto_aes_cmac_256_encrypt(struct ieee80211_tx_data *tx)
-{
- struct sk_buff *skb;
- struct ieee80211_tx_info *info;
- struct ieee80211_key *key = tx->key;
- struct ieee80211_mmie_16 *mmie;
- u8 aad[20];
- u64 pn64;
-
- if (WARN_ON(skb_queue_len(&tx->skbs) != 1))
- return TX_DROP;
-
- skb = skb_peek(&tx->skbs);
-
- info = IEEE80211_SKB_CB(skb);
-
- if (info->control.hw_key &&
- !(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIE))
- return TX_CONTINUE;
+ mmie_len = sizeof(*mmie) + mic_len;
- if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
+ if (WARN_ON(skb_tailroom(skb) < mmie_len))
return TX_DROP;
- mmie = skb_put(skb, sizeof(*mmie));
+ mmie = skb_put(skb, mmie_len);
mmie->element_id = WLAN_EID_MMIE;
- mmie->length = sizeof(*mmie) - 2;
+ mmie->length = mmie_len - 2;
mmie->key_id = cpu_to_le16(key->conf.keyidx);
/* PN = PN + 1 */
@@ -914,86 +870,40 @@ ieee80211_crypto_aes_cmac_256_encrypt(struct ieee80211_tx_data *tx)
bip_aad(skb, aad);
- /* MIC = AES-256-CMAC(IGTK, AAD || Management Frame Body || MMIE, 128)
- */
- ieee80211_aes_cmac_256(key->u.aes_cmac.tfm, aad,
- skb->data + 24, skb->len - 24, mmie->mic);
+ if (ieee80211_aes_cmac(key->u.aes_cmac.tfm, aad,
+ skb->data + 24, skb->len - 24,
+ mmie->mic, mic_len))
+ return TX_DROP;
return TX_CONTINUE;
}
ieee80211_rx_result
-ieee80211_crypto_aes_cmac_decrypt(struct ieee80211_rx_data *rx)
+ieee80211_crypto_aes_cmac_decrypt(struct ieee80211_rx_data *rx,
+ unsigned int mic_len)
{
struct sk_buff *skb = rx->skb;
struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
struct ieee80211_key *key = rx->key;
- struct ieee80211_mmie *mmie;
- u8 aad[20], mic[8], ipn[6];
+ struct ieee80211_mmie_var *mmie;
+ size_t mmie_len;
+ u8 aad[20], mic[IEEE80211_CMAC_256_MIC_LEN], ipn[6];
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
if (!ieee80211_is_mgmt(hdr->frame_control))
return RX_CONTINUE;
- /* management frames are already linear */
-
- if (skb->len < 24 + sizeof(*mmie))
- return RX_DROP_U_SHORT_CMAC;
-
- mmie = (struct ieee80211_mmie *)
- (skb->data + skb->len - sizeof(*mmie));
- if (mmie->element_id != WLAN_EID_MMIE ||
- mmie->length != sizeof(*mmie) - 2)
- return RX_DROP_U_BAD_MMIE; /* Invalid MMIE */
-
- bip_ipn_swap(ipn, mmie->sequence_number);
-
- if (memcmp(ipn, key->u.aes_cmac.rx_pn, 6) <= 0) {
- key->u.aes_cmac.replays++;
- return RX_DROP_U_REPLAY;
- }
-
- if (!(status->flag & RX_FLAG_DECRYPTED)) {
- /* hardware didn't decrypt/verify MIC */
- bip_aad(skb, aad);
- ieee80211_aes_cmac(key->u.aes_cmac.tfm, aad,
- skb->data + 24, skb->len - 24, mic);
- if (crypto_memneq(mic, mmie->mic, sizeof(mmie->mic))) {
- key->u.aes_cmac.icverrors++;
- return RX_DROP_U_MIC_FAIL;
- }
- }
-
- memcpy(key->u.aes_cmac.rx_pn, ipn, 6);
-
- /* Remove MMIE */
- skb_trim(skb, skb->len - sizeof(*mmie));
-
- return RX_CONTINUE;
-}
-
-ieee80211_rx_result
-ieee80211_crypto_aes_cmac_256_decrypt(struct ieee80211_rx_data *rx)
-{
- struct sk_buff *skb = rx->skb;
- struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
- struct ieee80211_key *key = rx->key;
- struct ieee80211_mmie_16 *mmie;
- u8 aad[20], mic[16], ipn[6];
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
-
- if (!ieee80211_is_mgmt(hdr->frame_control))
- return RX_CONTINUE;
+ mmie_len = sizeof(*mmie) + mic_len;
/* management frames are already linear */
- if (skb->len < 24 + sizeof(*mmie))
- return RX_DROP_U_SHORT_CMAC256;
+ if (skb->len < 24 + mmie_len)
+ return mic_len == IEEE80211_CMAC_128_MIC_LEN ?
+ RX_DROP_U_SHORT_CMAC : RX_DROP_U_SHORT_CMAC256;
- mmie = (struct ieee80211_mmie_16 *)
- (skb->data + skb->len - sizeof(*mmie));
+ mmie = (struct ieee80211_mmie_var *)(skb->data + skb->len - mmie_len);
if (mmie->element_id != WLAN_EID_MMIE ||
- mmie->length != sizeof(*mmie) - 2)
+ mmie->length != mmie_len - 2)
return RX_DROP_U_BAD_MMIE; /* Invalid MMIE */
bip_ipn_swap(ipn, mmie->sequence_number);
@@ -1006,9 +916,11 @@ ieee80211_crypto_aes_cmac_256_decrypt(struct ieee80211_rx_data *rx)
if (!(status->flag & RX_FLAG_DECRYPTED)) {
/* hardware didn't decrypt/verify MIC */
bip_aad(skb, aad);
- ieee80211_aes_cmac_256(key->u.aes_cmac.tfm, aad,
- skb->data + 24, skb->len - 24, mic);
- if (crypto_memneq(mic, mmie->mic, sizeof(mmie->mic))) {
+ if (ieee80211_aes_cmac(key->u.aes_cmac.tfm, aad,
+ skb->data + 24, skb->len - 24,
+ mic, mic_len))
+ return RX_DROP_U_DECRYPT_FAIL;
+ if (crypto_memneq(mic, mmie->mic, mic_len)) {
key->u.aes_cmac.icverrors++;
return RX_DROP_U_MIC_FAIL;
}
@@ -1017,7 +929,7 @@ ieee80211_crypto_aes_cmac_256_decrypt(struct ieee80211_rx_data *rx)
memcpy(key->u.aes_cmac.rx_pn, ipn, 6);
/* Remove MMIE */
- skb_trim(skb, skb->len - sizeof(*mmie));
+ skb_trim(skb, skb->len - mmie_len);
return RX_CONTINUE;
}
@@ -1113,7 +1025,7 @@ ieee80211_crypto_aes_gmac_decrypt(struct ieee80211_rx_data *rx)
memcpy(nonce, hdr->addr2, ETH_ALEN);
memcpy(nonce + ETH_ALEN, ipn, 6);
- mic = kmalloc(GMAC_MIC_LEN, GFP_ATOMIC);
+ mic = kmalloc(IEEE80211_GMAC_MIC_LEN, GFP_ATOMIC);
if (!mic)
return RX_DROP_U_OOM;
if (ieee80211_aes_gmac(key->u.aes_gmac.tfm, aad, nonce,
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-04 23:36:37 +0000