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Diffstat (limited to 'net/mac80211/wpa.c')
-rw-r--r--net/mac80211/wpa.c83
1 files changed, 45 insertions, 38 deletions
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
index 943f7606527e..feb547dc8643 100644
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -516,31 +516,34 @@ ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx,
return RX_DROP_UNUSABLE;
}
- ccmp_hdr2pn(pn, skb->data + hdrlen);
+ if (!(status->flag & RX_FLAG_PN_VALIDATED)) {
+ ccmp_hdr2pn(pn, skb->data + hdrlen);
- queue = rx->security_idx;
+ queue = rx->security_idx;
- if (memcmp(pn, key->u.ccmp.rx_pn[queue], IEEE80211_CCMP_PN_LEN) <= 0) {
- key->u.ccmp.replays++;
- return RX_DROP_UNUSABLE;
- }
+ if (memcmp(pn, key->u.ccmp.rx_pn[queue],
+ IEEE80211_CCMP_PN_LEN) <= 0) {
+ key->u.ccmp.replays++;
+ return RX_DROP_UNUSABLE;
+ }
- if (!(status->flag & RX_FLAG_DECRYPTED)) {
- u8 aad[2 * AES_BLOCK_SIZE];
- u8 b_0[AES_BLOCK_SIZE];
- /* hardware didn't decrypt/verify MIC */
- ccmp_special_blocks(skb, pn, b_0, aad);
+ if (!(status->flag & RX_FLAG_DECRYPTED)) {
+ u8 aad[2 * AES_BLOCK_SIZE];
+ u8 b_0[AES_BLOCK_SIZE];
+ /* hardware didn't decrypt/verify MIC */
+ ccmp_special_blocks(skb, pn, b_0, aad);
+
+ if (ieee80211_aes_ccm_decrypt(
+ key->u.ccmp.tfm, b_0, aad,
+ skb->data + hdrlen + IEEE80211_CCMP_HDR_LEN,
+ data_len,
+ skb->data + skb->len - mic_len, mic_len))
+ return RX_DROP_UNUSABLE;
+ }
- if (ieee80211_aes_ccm_decrypt(
- key->u.ccmp.tfm, b_0, aad,
- skb->data + hdrlen + IEEE80211_CCMP_HDR_LEN,
- data_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);
}
- memcpy(key->u.ccmp.rx_pn[queue], pn, IEEE80211_CCMP_PN_LEN);
-
/* Remove CCMP header and MIC */
if (pskb_trim(skb, skb->len - mic_len))
return RX_DROP_UNUSABLE;
@@ -739,31 +742,35 @@ ieee80211_crypto_gcmp_decrypt(struct ieee80211_rx_data *rx)
return RX_DROP_UNUSABLE;
}
- gcmp_hdr2pn(pn, skb->data + hdrlen);
+ if (!(status->flag & RX_FLAG_PN_VALIDATED)) {
+ gcmp_hdr2pn(pn, skb->data + hdrlen);
- queue = rx->security_idx;
+ queue = rx->security_idx;
- if (memcmp(pn, key->u.gcmp.rx_pn[queue], IEEE80211_GCMP_PN_LEN) <= 0) {
- key->u.gcmp.replays++;
- return RX_DROP_UNUSABLE;
- }
+ if (memcmp(pn, key->u.gcmp.rx_pn[queue],
+ IEEE80211_GCMP_PN_LEN) <= 0) {
+ key->u.gcmp.replays++;
+ return RX_DROP_UNUSABLE;
+ }
- if (!(status->flag & RX_FLAG_DECRYPTED)) {
- u8 aad[2 * AES_BLOCK_SIZE];
- u8 j_0[AES_BLOCK_SIZE];
- /* hardware didn't decrypt/verify MIC */
- gcmp_special_blocks(skb, pn, j_0, aad);
+ if (!(status->flag & RX_FLAG_DECRYPTED)) {
+ u8 aad[2 * AES_BLOCK_SIZE];
+ u8 j_0[AES_BLOCK_SIZE];
+ /* hardware didn't decrypt/verify MIC */
+ gcmp_special_blocks(skb, pn, j_0, aad);
+
+ if (ieee80211_aes_gcm_decrypt(
+ key->u.gcmp.tfm, j_0, aad,
+ skb->data + hdrlen + IEEE80211_GCMP_HDR_LEN,
+ data_len,
+ skb->data + skb->len -
+ IEEE80211_GCMP_MIC_LEN))
+ return RX_DROP_UNUSABLE;
+ }
- if (ieee80211_aes_gcm_decrypt(
- key->u.gcmp.tfm, j_0, aad,
- skb->data + hdrlen + IEEE80211_GCMP_HDR_LEN,
- data_len,
- skb->data + skb->len - IEEE80211_GCMP_MIC_LEN))
- return RX_DROP_UNUSABLE;
+ memcpy(key->u.gcmp.rx_pn[queue], pn, IEEE80211_GCMP_PN_LEN);
}
- memcpy(key->u.gcmp.rx_pn[queue], pn, IEEE80211_GCMP_PN_LEN);
-
/* Remove GCMP header and MIC */
if (pskb_trim(skb, skb->len - IEEE80211_GCMP_MIC_LEN))
return RX_DROP_UNUSABLE;