diff options
| author | Jouni Malinen <jouni@qca.qualcomm.com> | 2015-01-24 19:52:07 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2015-01-27 11:07:35 +0100 |
| commit | 2b2ba0db1c820d04d5143452d70012cd44d7b578 (patch) | |
| tree | 7c186fc249d191d9ecba66e740e7a4c922a986d5 /net/mac80211/wpa.c | |
| parent | 00b9cfa3ff38401bd70c34b250ca13e5ea347b4a (diff) | |
mac80111: Add CCMP-256 cipher
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>
Diffstat (limited to 'net/mac80211/wpa.c')
| -rw-r--r-- | net/mac80211/wpa.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c index 96b65c240109..ae654de9782a 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, + unsigned int mic_len) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; struct ieee80211_key *key = tx->key; @@ -425,7 +426,7 @@ 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 +461,22 @@ 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, + unsigned int mic_len) { 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, mic_len) < 0) return TX_DROP; } @@ -483,7 +485,8 @@ 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, + unsigned int mic_len) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; int hdrlen; @@ -500,8 +503,7 @@ 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 +534,14 @@ 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); |