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| author | Harvey Harrison <harvey.harrison@gmail.com> | 2008-07-02 16:30:52 -0700 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2008-07-08 14:16:02 -0400 |
| commit | feccb466944cb1aeaabc701cfde6771f3be74919 (patch) | |
| tree | 62da55862059f4adb4858376b4698f1d81afbec4 /net/mac80211/wpa.c | |
| parent | c34498b9e633baa3266af98106502633b6bc371b (diff) | |
| download | op-kernel-dev-feccb466944cb1aeaabc701cfde6771f3be74919.zip op-kernel-dev-feccb466944cb1aeaabc701cfde6771f3be74919.tar.gz | |
mac80211: pass scratch buffer directly, remove additional pointers
Recalculate the offset pointers in the ccmp calculations rather than
in the callers.
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/wpa.c')
| -rw-r--r-- | net/mac80211/wpa.c | 26 |
1 files changed, 10 insertions, 16 deletions
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c index ec2ae86..2f33df0 100644 --- a/net/mac80211/wpa.c +++ b/net/mac80211/wpa.c @@ -274,16 +274,20 @@ ieee80211_crypto_tkip_decrypt(struct ieee80211_rx_data *rx) } -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 *scratch, int encrypted) { __le16 mask_fc; int a4_included; u8 qos_tid; + u8 *b_0, *aad; u16 data_len, len_a; unsigned int hdrlen; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; + b_0 = scratch + 3 * AES_BLOCK_LEN; + aad = scratch + 4 * AES_BLOCK_LEN; + /* * Mask FC: zero subtype b4 b5 b6 * Retry, PwrMgt, MoreData; set Protected @@ -367,7 +371,7 @@ static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb) struct ieee80211_key *key = tx->key; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); int hdrlen, len, tail; - u8 *pos, *pn, *b_0, *aad, *scratch; + u8 *pos, *pn; int i; info->control.icv_len = CCMP_MIC_LEN; @@ -381,10 +385,6 @@ static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb) return 0; } - scratch = key->u.ccmp.tx_crypto_buf; - b_0 = scratch + 3 * AES_BLOCK_LEN; - aad = scratch + 4 * AES_BLOCK_LEN; - hdrlen = ieee80211_hdrlen(hdr->frame_control); len = skb->len - hdrlen; @@ -420,8 +420,8 @@ static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb) } pos += CCMP_HDR_LEN; - ccmp_special_blocks(skb, pn, b_0, aad, 0); - ieee80211_aes_ccm_encrypt(key->u.ccmp.tfm, scratch, b_0, aad, pos, len, + ccmp_special_blocks(skb, pn, key->u.ccmp.tx_crypto_buf, 0); + ieee80211_aes_ccm_encrypt(key->u.ccmp.tfm, key->u.ccmp.tx_crypto_buf, pos, len, pos, skb_put(skb, CCMP_MIC_LEN)); return 0; @@ -483,16 +483,10 @@ ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx) if (!(rx->status->flag & RX_FLAG_DECRYPTED)) { /* hardware didn't decrypt/verify MIC */ - u8 *scratch, *b_0, *aad; - - scratch = key->u.ccmp.rx_crypto_buf; - b_0 = scratch + 3 * AES_BLOCK_LEN; - aad = scratch + 4 * AES_BLOCK_LEN; - - ccmp_special_blocks(skb, pn, b_0, aad, 1); + ccmp_special_blocks(skb, pn, key->u.ccmp.rx_crypto_buf, 1); if (ieee80211_aes_ccm_decrypt( - key->u.ccmp.tfm, scratch, b_0, aad, + key->u.ccmp.tfm, key->u.ccmp.rx_crypto_buf, skb->data + hdrlen + CCMP_HDR_LEN, data_len, skb->data + skb->len - CCMP_MIC_LEN, skb->data + hdrlen + CCMP_HDR_LEN)) { |
