From b0f76b335f8b1c324b4b2be06369d391b26a7cc9 Mon Sep 17 00:00:00 2001 From: Harvey Harrison Date: Wed, 14 May 2008 16:26:19 -0700 Subject: [PATCH] mac80211: add a struct to hold tkip context Signed-off-by: Harvey Harrison Cc: "John W. Linville" Signed-off-by: Andrew Morton Signed-off-by: John W. Linville --- net/mac80211/cfg.c | 4 +-- net/mac80211/debugfs_key.c | 8 +++--- net/mac80211/key.h | 17 ++++++------ net/mac80211/tkip.c | 54 +++++++++++++++++++------------------- net/mac80211/wpa.c | 16 +++++------ 5 files changed, 50 insertions(+), 49 deletions(-) diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 3cef80dcd0e5..dbf0563c397d 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -256,8 +256,8 @@ static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev, case ALG_TKIP: params.cipher = WLAN_CIPHER_SUITE_TKIP; - iv32 = key->u.tkip.iv32; - iv16 = key->u.tkip.iv16; + iv32 = key->u.tkip.tx.iv32; + iv16 = key->u.tkip.tx.iv16; if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE && sdata->local->ops->get_tkip_seq) diff --git a/net/mac80211/debugfs_key.c b/net/mac80211/debugfs_key.c index 19efc3a6a932..7439b63df5d0 100644 --- a/net/mac80211/debugfs_key.c +++ b/net/mac80211/debugfs_key.c @@ -97,8 +97,8 @@ static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf, break; case ALG_TKIP: len = scnprintf(buf, sizeof(buf), "%08x %04x\n", - key->u.tkip.iv32, - key->u.tkip.iv16); + key->u.tkip.tx.iv32, + key->u.tkip.tx.iv16); break; case ALG_CCMP: tpn = key->u.ccmp.tx_pn; @@ -128,8 +128,8 @@ static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf, for (i = 0; i < NUM_RX_DATA_QUEUES; i++) p += scnprintf(p, sizeof(buf)+buf-p, "%08x %04x\n", - key->u.tkip.iv32_rx[i], - key->u.tkip.iv16_rx[i]); + key->u.tkip.rx[i].iv32, + key->u.tkip.rx[i].iv16); len = p - buf; break; case ALG_CCMP: diff --git a/net/mac80211/key.h b/net/mac80211/key.h index f52c3df1fe9a..a0f774aafa45 100644 --- a/net/mac80211/key.h +++ b/net/mac80211/key.h @@ -69,6 +69,13 @@ enum ieee80211_internal_key_flags { KEY_FLAG_TODO_ADD_DEBUGFS = BIT(5), }; +struct tkip_ctx { + u32 iv32; + u16 iv16; + u16 p1k[5]; + int initialized; +}; + struct ieee80211_key { struct ieee80211_local *local; struct ieee80211_sub_if_data *sdata; @@ -85,16 +92,10 @@ struct ieee80211_key { union { struct { /* last used TSC */ - u32 iv32; - u16 iv16; - u16 p1k[5]; - int tx_initialized; + struct tkip_ctx tx; /* last received RSC */ - u32 iv32_rx[NUM_RX_DATA_QUEUES]; - u16 iv16_rx[NUM_RX_DATA_QUEUES]; - u16 p1k_rx[NUM_RX_DATA_QUEUES][5]; - int rx_initialized[NUM_RX_DATA_QUEUES]; + struct tkip_ctx rx[NUM_RX_DATA_QUEUES]; } tkip; struct { u8 tx_pn[6]; diff --git a/net/mac80211/tkip.c b/net/mac80211/tkip.c index 8cdf053cb835..d74c91e23a7f 100644 --- a/net/mac80211/tkip.c +++ b/net/mac80211/tkip.c @@ -138,7 +138,7 @@ u8 *ieee80211_tkip_add_iv(u8 *pos, struct ieee80211_key *key, *pos++ = iv1; *pos++ = iv2; *pos++ = (key->conf.keyidx << 6) | (1 << 5) /* Ext IV */; - put_unaligned_le32(key->u.tkip.iv32, pos); + put_unaligned_le32(key->u.tkip.tx.iv32, pos); return pos + 4; } @@ -146,16 +146,16 @@ static void ieee80211_tkip_gen_rc4key(struct ieee80211_key *key, u8 *ta, u8 *rc4key) { /* Calculate per-packet key */ - if (key->u.tkip.iv16 == 0 || !key->u.tkip.tx_initialized) { + if (key->u.tkip.tx.iv16 == 0 || !key->u.tkip.tx.initialized) { /* IV16 wrapped around - perform TKIP phase 1 */ tkip_mixing_phase1(ta, &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY], - key->u.tkip.iv32, key->u.tkip.p1k); - key->u.tkip.tx_initialized = 1; + key->u.tkip.tx.iv32, key->u.tkip.tx.p1k); + key->u.tkip.tx.initialized = 1; } - tkip_mixing_phase2(key->u.tkip.p1k, + tkip_mixing_phase2(key->u.tkip.tx.p1k, &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY], - key->u.tkip.iv16, rc4key); + key->u.tkip.tx.iv16, rc4key); } void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, @@ -179,9 +179,9 @@ void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, printk(KERN_DEBUG "TKIP encrypt: iv16 = 0x%04x, iv32 = 0x%08x\n", iv16, iv32); - if (iv32 != key->u.tkip.iv32) { + if (iv32 != key->u.tkip.tx.iv32) { printk(KERN_DEBUG "skb: iv32 = 0x%08x key: iv32 = 0x%08x\n", - iv32, key->u.tkip.iv32); + iv32, key->u.tkip.tx.iv32); printk(KERN_DEBUG "Wrap around of iv16 in the middle of a " "fragmented packet\n"); } @@ -190,19 +190,19 @@ void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, /* Update the p1k only when the iv16 in the packet wraps around, this * might occur after the wrap around of iv16 in the key in case of * fragmented packets. */ - if (iv16 == 0 || !key->u.tkip.tx_initialized) { + if (iv16 == 0 || !key->u.tkip.tx.initialized) { /* IV16 wrapped around - perform TKIP phase 1 */ tkip_mixing_phase1(ta, &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY], - iv32, key->u.tkip.p1k); - key->u.tkip.tx_initialized = 1; + iv32, key->u.tkip.tx.p1k); + key->u.tkip.tx.initialized = 1; } if (type == IEEE80211_TKIP_P1_KEY) { - memcpy(outkey, key->u.tkip.p1k, sizeof(u16) * 5); + memcpy(outkey, key->u.tkip.tx.p1k, sizeof(u16) * 5); return; } - tkip_mixing_phase2(key->u.tkip.p1k, + tkip_mixing_phase2(key->u.tkip.tx.p1k, &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY], iv16, outkey); } EXPORT_SYMBOL(ieee80211_get_tkip_key); @@ -263,33 +263,33 @@ int ieee80211_tkip_decrypt_data(struct crypto_blkcipher *tfm, if ((keyid >> 6) != key->conf.keyidx) return TKIP_DECRYPT_INVALID_KEYIDX; - if (key->u.tkip.rx_initialized[queue] && - (iv32 < key->u.tkip.iv32_rx[queue] || - (iv32 == key->u.tkip.iv32_rx[queue] && - iv16 <= key->u.tkip.iv16_rx[queue]))) { + if (key->u.tkip.rx[queue].initialized && + (iv32 < key->u.tkip.rx[queue].iv32 || + (iv32 == key->u.tkip.rx[queue].iv32 && + iv16 <= key->u.tkip.rx[queue].iv16))) { #ifdef CONFIG_TKIP_DEBUG DECLARE_MAC_BUF(mac); printk(KERN_DEBUG "TKIP replay detected for RX frame from " "%s (RX IV (%04x,%02x) <= prev. IV (%04x,%02x)\n", print_mac(mac, ta), - iv32, iv16, key->u.tkip.iv32_rx[queue], - key->u.tkip.iv16_rx[queue]); + iv32, iv16, key->u.tkip.rx[queue].iv32, + key->u.tkip.rx[queue].iv16); #endif /* CONFIG_TKIP_DEBUG */ return TKIP_DECRYPT_REPLAY; } if (only_iv) { res = TKIP_DECRYPT_OK; - key->u.tkip.rx_initialized[queue] = 1; + key->u.tkip.rx[queue].initialized = 1; goto done; } - if (!key->u.tkip.rx_initialized[queue] || - key->u.tkip.iv32_rx[queue] != iv32) { - key->u.tkip.rx_initialized[queue] = 1; + if (!key->u.tkip.rx[queue].initialized || + key->u.tkip.rx[queue].iv32 != iv32) { + key->u.tkip.rx[queue].initialized = 1; /* IV16 wrapped around - perform TKIP phase 1 */ tkip_mixing_phase1(ta, &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY], - iv32, key->u.tkip.p1k_rx[queue]); + iv32, key->u.tkip.rx[queue].p1k); #ifdef CONFIG_TKIP_DEBUG { int i; @@ -303,7 +303,7 @@ int ieee80211_tkip_decrypt_data(struct crypto_blkcipher *tfm, printk("\n"); printk(KERN_DEBUG "TKIP decrypt: P1K="); for (i = 0; i < 5; i++) - printk("%04x ", key->u.tkip.p1k_rx[queue][i]); + printk("%04x ", key->u.tkip.rx[queue].p1k[i]); printk("\n"); } #endif /* CONFIG_TKIP_DEBUG */ @@ -318,11 +318,11 @@ int ieee80211_tkip_decrypt_data(struct crypto_blkcipher *tfm, key->local->ops->update_tkip_key( local_to_hw(key->local), &key->conf, - sta_addr, iv32, key->u.tkip.p1k_rx[queue]); + sta_addr, iv32, key->u.tkip.rx[queue].p1k); } } - tkip_mixing_phase2(key->u.tkip.p1k_rx[queue], + tkip_mixing_phase2(key->u.tkip.rx[queue].p1k, &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY], iv16, rc4key); #ifdef CONFIG_TKIP_DEBUG diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c index 42f3654e1c5e..d7304490d2ec 100644 --- a/net/mac80211/wpa.c +++ b/net/mac80211/wpa.c @@ -176,8 +176,8 @@ ieee80211_rx_h_michael_mic_verify(struct ieee80211_rx_data *rx) skb_trim(skb, skb->len - MICHAEL_MIC_LEN); /* update IV in key information to be able to detect replays */ - rx->key->u.tkip.iv32_rx[rx->queue] = rx->tkip_iv32; - rx->key->u.tkip.iv16_rx[rx->queue] = rx->tkip_iv16; + rx->key->u.tkip.rx[rx->queue].iv32 = rx->tkip_iv32; + rx->key->u.tkip.rx[rx->queue].iv16 = rx->tkip_iv16; return RX_CONTINUE; } @@ -214,19 +214,19 @@ static int tkip_encrypt_skb(struct ieee80211_tx_data *tx, pos += hdrlen; /* Increase IV for the frame */ - key->u.tkip.iv16++; - if (key->u.tkip.iv16 == 0) - key->u.tkip.iv32++; + key->u.tkip.tx.iv16++; + if (key->u.tkip.tx.iv16 == 0) + key->u.tkip.tx.iv32++; if (tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) { hdr = (struct ieee80211_hdr *)skb->data; /* hwaccel - with preallocated room for IV */ ieee80211_tkip_add_iv(pos, key, - (u8) (key->u.tkip.iv16 >> 8), - (u8) (((key->u.tkip.iv16 >> 8) | 0x20) & + (u8) (key->u.tkip.tx.iv16 >> 8), + (u8) (((key->u.tkip.tx.iv16 >> 8) | 0x20) & 0x7f), - (u8) key->u.tkip.iv16); + (u8) key->u.tkip.tx.iv16); tx->control->hw_key = &tx->key->conf; return 0; -- 2.20.1