diff options
Diffstat (limited to 'net/mac80211/aes_gmac.c')
| -rw-r--r-- | net/mac80211/aes_gmac.c | 31 |
1 files changed, 22 insertions, 9 deletions
diff --git a/net/mac80211/aes_gmac.c b/net/mac80211/aes_gmac.c index 363ad1c1dc0c..512cab073f2e 100644 --- a/net/mac80211/aes_gmac.c +++ b/net/mac80211/aes_gmac.c @@ -17,10 +17,12 @@ int ieee80211_aes_gmac(struct crypto_aead *tfm, const u8 *aad, u8 *nonce, const u8 *data, size_t data_len, u8 *mic) { - struct scatterlist sg[4]; + struct scatterlist sg[5]; u8 *zero, *__aad, iv[AES_BLOCK_SIZE]; struct aead_request *aead_req; int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm); + const __le16 *fc; + int ret; if (data_len < GMAC_MIC_LEN) return -EINVAL; @@ -33,11 +35,22 @@ int ieee80211_aes_gmac(struct crypto_aead *tfm, const u8 *aad, u8 *nonce, __aad = zero + GMAC_MIC_LEN; memcpy(__aad, aad, GMAC_AAD_LEN); - sg_init_table(sg, 4); - sg_set_buf(&sg[0], __aad, GMAC_AAD_LEN); - sg_set_buf(&sg[1], data, data_len - GMAC_MIC_LEN); - sg_set_buf(&sg[2], zero, GMAC_MIC_LEN); - sg_set_buf(&sg[3], mic, GMAC_MIC_LEN); + fc = (const __le16 *)aad; + if (ieee80211_is_beacon(*fc)) { + /* mask Timestamp field to zero */ + sg_init_table(sg, 5); + sg_set_buf(&sg[0], __aad, GMAC_AAD_LEN); + sg_set_buf(&sg[1], zero, 8); + sg_set_buf(&sg[2], data + 8, data_len - 8 - GMAC_MIC_LEN); + sg_set_buf(&sg[3], zero, GMAC_MIC_LEN); + sg_set_buf(&sg[4], mic, GMAC_MIC_LEN); + } else { + sg_init_table(sg, 4); + sg_set_buf(&sg[0], __aad, GMAC_AAD_LEN); + sg_set_buf(&sg[1], data, data_len - GMAC_MIC_LEN); + sg_set_buf(&sg[2], zero, GMAC_MIC_LEN); + sg_set_buf(&sg[3], mic, GMAC_MIC_LEN); + } memcpy(iv, nonce, GMAC_NONCE_LEN); memset(iv + GMAC_NONCE_LEN, 0, sizeof(iv) - GMAC_NONCE_LEN); @@ -47,10 +60,10 @@ int ieee80211_aes_gmac(struct crypto_aead *tfm, const u8 *aad, u8 *nonce, aead_request_set_crypt(aead_req, sg, sg, 0, iv); aead_request_set_ad(aead_req, GMAC_AAD_LEN + data_len); - crypto_aead_encrypt(aead_req); - kzfree(aead_req); + ret = crypto_aead_encrypt(aead_req); + kfree_sensitive(aead_req); - return 0; + return ret; } struct crypto_aead *ieee80211_aes_gmac_key_setup(const u8 key[], |