diff options
Diffstat (limited to 'package/kernel/mac80211/patches/100-revert_aes_ccm_port.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/100-revert_aes_ccm_port.patch | 322 |
1 files changed, 161 insertions, 161 deletions
diff --git a/package/kernel/mac80211/patches/100-revert_aes_ccm_port.patch b/package/kernel/mac80211/patches/100-revert_aes_ccm_port.patch index ac7d6b3495..640d34e51f 100644 --- a/package/kernel/mac80211/patches/100-revert_aes_ccm_port.patch +++ b/package/kernel/mac80211/patches/100-revert_aes_ccm_port.patch @@ -1,111 +1,10 @@ ---- a/net/mac80211/wpa.c -+++ b/net/mac80211/wpa.c -@@ -301,15 +301,22 @@ ieee80211_crypto_tkip_decrypt(struct iee - } - - --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, mgmt; - u8 qos_tid; -- u16 len_a; -+ u8 *b_0, *aad; -+ u16 data_len, len_a; - unsigned int hdrlen; - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; - -+ memset(scratch, 0, 6 * AES_BLOCK_SIZE); -+ -+ b_0 = scratch + 3 * AES_BLOCK_SIZE; -+ aad = scratch + 4 * AES_BLOCK_SIZE; -+ - /* - * Mask FC: zero subtype b4 b5 b6 (if not mgmt) - * Retry, PwrMgt, MoreData; set Protected -@@ -331,21 +338,20 @@ static void ccmp_special_blocks(struct s - else - qos_tid = 0; - -- /* In CCM, the initial vectors (IV) used for CTR mode encryption and CBC -- * mode authentication are not allowed to collide, yet both are derived -- * from this vector b_0. We only set L := 1 here to indicate that the -- * data size can be represented in (L+1) bytes. The CCM layer will take -- * care of storing the data length in the top (L+1) bytes and setting -- * and clearing the other bits as is required to derive the two IVs. -- */ -- b_0[0] = 0x1; -+ data_len = skb->len - hdrlen - IEEE80211_CCMP_HDR_LEN; -+ if (encrypted) -+ data_len -= IEEE80211_CCMP_MIC_LEN; - -+ /* First block, b_0 */ -+ b_0[0] = 0x59; /* flags: Adata: 1, M: 011, L: 001 */ - /* Nonce: Nonce Flags | A2 | PN - * Nonce Flags: Priority (b0..b3) | Management (b4) | Reserved (b5..b7) - */ - b_0[1] = qos_tid | (mgmt << 4); - memcpy(&b_0[2], hdr->addr2, ETH_ALEN); - memcpy(&b_0[8], pn, IEEE80211_CCMP_PN_LEN); -+ /* l(m) */ -+ put_unaligned_be16(data_len, &b_0[14]); - - /* AAD (extra authenticate-only data) / masked 802.11 header - * FC | A1 | A2 | A3 | SC | [A4] | [QC] */ -@@ -401,8 +407,7 @@ static int ccmp_encrypt_skb(struct ieee8 - u8 *pos; - u8 pn[6]; - u64 pn64; -- u8 aad[2 * AES_BLOCK_SIZE]; -- u8 b_0[AES_BLOCK_SIZE]; -+ u8 scratch[6 * AES_BLOCK_SIZE]; - - if (info->control.hw_key && - !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) && -@@ -455,9 +460,9 @@ static int ccmp_encrypt_skb(struct ieee8 - return 0; - - 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)); -+ ccmp_special_blocks(skb, pn, scratch, 0); -+ ieee80211_aes_ccm_encrypt(key->u.ccmp.tfm, scratch, pos, len, -+ pos, skb_put(skb, IEEE80211_CCMP_MIC_LEN)); - - return 0; - } -@@ -520,16 +525,16 @@ ieee80211_crypto_ccmp_decrypt(struct iee - } - - if (!(status->flag & RX_FLAG_DECRYPTED)) { -- u8 aad[2 * AES_BLOCK_SIZE]; -- u8 b_0[AES_BLOCK_SIZE]; -+ u8 scratch[6 * AES_BLOCK_SIZE]; - /* hardware didn't decrypt/verify MIC */ -- ccmp_special_blocks(skb, pn, b_0, aad); -+ ccmp_special_blocks(skb, pn, scratch, 1); - - if (ieee80211_aes_ccm_decrypt( -- key->u.ccmp.tfm, b_0, aad, -+ key->u.ccmp.tfm, scratch, - skb->data + hdrlen + IEEE80211_CCMP_HDR_LEN, - data_len, -- skb->data + skb->len - IEEE80211_CCMP_MIC_LEN)) -+ skb->data + skb->len - IEEE80211_CCMP_MIC_LEN, -+ skb->data + hdrlen + IEEE80211_CCMP_HDR_LEN)) - return RX_DROP_UNUSABLE; - } - --- a/net/mac80211/Kconfig +++ b/net/mac80211/Kconfig @@ -5,7 +5,6 @@ config MAC80211 depends on CRYPTO depends on CRYPTO_ARC4 depends on CRYPTO_AES -- depends on CRYPTO_CCM +- select BACKPORT_CRYPTO_CCM depends on CRC32 select BACKPORT_AVERAGE ---help--- @@ -120,35 +19,17 @@ * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. -@@ -19,75 +17,134 @@ +@@ -19,76 +17,134 @@ #include "key.h" #include "aes_ccm.h" -void ieee80211_aes_ccm_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, - u8 *data, size_t data_len, u8 *mic) +static void aes_ccm_prepare(struct crypto_cipher *tfm, u8 *scratch, u8 *a) - { -- struct scatterlist assoc, pt, ct[2]; -- struct { -- struct aead_request req; -- u8 priv[crypto_aead_reqsize(tfm)]; -- } aead_req; -- -- memset(&aead_req, 0, sizeof(aead_req)); -- -- sg_init_one(&pt, data, data_len); -- sg_init_one(&assoc, &aad[2], be16_to_cpup((__be16 *)aad)); -- sg_init_table(ct, 2); -- sg_set_buf(&ct[0], data, data_len); -- sg_set_buf(&ct[1], mic, IEEE80211_CCMP_MIC_LEN); -- -- aead_request_set_tfm(&aead_req.req, tfm); -- aead_request_set_assoc(&aead_req.req, &assoc, assoc.length); -- aead_request_set_crypt(&aead_req.req, &pt, ct, data_len, b_0); ++{ + int i; + u8 *b_0, *aad, *b, *s_0; - -- crypto_aead_encrypt(&aead_req.req); ++ + b_0 = scratch + 3 * AES_BLOCK_SIZE; + aad = scratch + 4 * AES_BLOCK_SIZE; + b = scratch; @@ -174,22 +55,23 @@ + b_0[14] = 0; + b_0[15] = 0; + crypto_cipher_encrypt_one(tfm, s_0, b_0); - } - --int ieee80211_aes_ccm_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, -- u8 *data, size_t data_len, u8 *mic) ++} ++ + +void ieee80211_aes_ccm_encrypt(struct crypto_cipher *tfm, u8 *scratch, + u8 *data, size_t data_len, + u8 *cdata, u8 *mic) { - struct scatterlist assoc, pt, ct[2]; -- struct { -- struct aead_request req; -- u8 priv[crypto_aead_reqsize(tfm)]; -- } aead_req; ++ int i, j, last_len, num_blocks; ++ u8 *pos, *cpos, *b, *s_0, *e, *b_0; + +- char aead_req_data[sizeof(struct aead_request) + +- crypto_aead_reqsize(tfm)] +- __aligned(__alignof__(struct aead_request)); +- struct aead_request *aead_req = (void *) aead_req_data; - -- memset(&aead_req, 0, sizeof(aead_req)); +- memset(aead_req, 0, sizeof(aead_req_data)); - - sg_init_one(&pt, data, data_len); - sg_init_one(&assoc, &aad[2], be16_to_cpup((__be16 *)aad)); @@ -197,13 +79,9 @@ - sg_set_buf(&ct[0], data, data_len); - sg_set_buf(&ct[1], mic, IEEE80211_CCMP_MIC_LEN); - -- aead_request_set_tfm(&aead_req.req, tfm); -- aead_request_set_assoc(&aead_req.req, &assoc, assoc.length); -- aead_request_set_crypt(&aead_req.req, ct, &pt, -- data_len + IEEE80211_CCMP_MIC_LEN, b_0); -+ int i, j, last_len, num_blocks; -+ u8 *pos, *cpos, *b, *s_0, *e, *b_0; -+ +- aead_request_set_tfm(aead_req, tfm); +- aead_request_set_assoc(aead_req, &assoc, assoc.length); +- aead_request_set_crypt(aead_req, &pt, ct, data_len, b_0); + b = scratch; + s_0 = scratch + AES_BLOCK_SIZE; + e = scratch + 2 * AES_BLOCK_SIZE; @@ -232,30 +110,38 @@ + *cpos++ = *pos++ ^ e[i]; + } -- return crypto_aead_decrypt(&aead_req.req); +- crypto_aead_encrypt(aead_req); + for (i = 0; i < IEEE80211_CCMP_MIC_LEN; i++) + mic[i] = b[i] ^ s_0[i]; } --struct crypto_aead *ieee80211_aes_key_setup_encrypt(const u8 key[]) +-int ieee80211_aes_ccm_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, +- u8 *data, size_t data_len, u8 *mic) + +int ieee80211_aes_ccm_decrypt(struct crypto_cipher *tfm, u8 *scratch, + u8 *cdata, size_t data_len, u8 *mic, u8 *data) { -- struct crypto_aead *tfm; -- int err; +- struct scatterlist assoc, pt, ct[2]; +- char aead_req_data[sizeof(struct aead_request) + +- crypto_aead_reqsize(tfm)] +- __aligned(__alignof__(struct aead_request)); +- struct aead_request *aead_req = (void *) aead_req_data; +- +- memset(aead_req, 0, sizeof(aead_req_data)); +- +- sg_init_one(&pt, data, data_len); +- sg_init_one(&assoc, &aad[2], be16_to_cpup((__be16 *)aad)); +- sg_init_table(ct, 2); +- sg_set_buf(&ct[0], data, data_len); +- sg_set_buf(&ct[1], mic, IEEE80211_CCMP_MIC_LEN); +- +- aead_request_set_tfm(aead_req, tfm); +- aead_request_set_assoc(aead_req, &assoc, assoc.length); +- aead_request_set_crypt(aead_req, ct, &pt, +- data_len + IEEE80211_CCMP_MIC_LEN, b_0); + int i, j, last_len, num_blocks; + u8 *pos, *cpos, *b, *s_0, *a, *b_0; - -- tfm = crypto_alloc_aead("ccm(aes)", 0, CRYPTO_ALG_ASYNC); -- if (IS_ERR(tfm)) -- return tfm; -- -- err = crypto_aead_setkey(tfm, key, WLAN_KEY_LEN_CCMP); -- if (!err) -- err = crypto_aead_setauthsize(tfm, IEEE80211_CCMP_MIC_LEN); -- if (!err) -- return tfm; ++ + b = scratch; + s_0 = scratch + AES_BLOCK_SIZE; + a = scratch + 2 * AES_BLOCK_SIZE; @@ -288,24 +174,37 @@ + return -1; + } -- crypto_free_aead(tfm); -- return ERR_PTR(err); +- return crypto_aead_decrypt(aead_req); + return 0; } --void ieee80211_aes_key_free(struct crypto_aead *tfm) +-struct crypto_aead *ieee80211_aes_key_setup_encrypt(const u8 key[]) + +struct crypto_cipher *ieee80211_aes_key_setup_encrypt(const u8 key[]) -+{ + { +- struct crypto_aead *tfm; +- int err; + struct crypto_cipher *tfm; -+ + +- tfm = crypto_alloc_aead("ccm(aes)", 0, CRYPTO_ALG_ASYNC); +- if (IS_ERR(tfm)) +- return tfm; +- +- err = crypto_aead_setkey(tfm, key, WLAN_KEY_LEN_CCMP); +- if (!err) +- err = crypto_aead_setauthsize(tfm, IEEE80211_CCMP_MIC_LEN); +- if (!err) +- return tfm; + tfm = crypto_alloc_cipher("aes", 0, CRYPTO_ALG_ASYNC); + if (!IS_ERR(tfm)) + crypto_cipher_setkey(tfm, key, WLAN_KEY_LEN_CCMP); -+ + +- crypto_free_aead(tfm); +- return ERR_PTR(err); + return tfm; -+} -+ + } + +-void ieee80211_aes_key_free(struct crypto_aead *tfm) + +void ieee80211_aes_key_free(struct crypto_cipher *tfm) { @@ -345,3 +244,104 @@ u32 replays; /* dot11RSNAStatsCCMPReplays */ } ccmp; struct { +--- a/net/mac80211/wpa.c ++++ b/net/mac80211/wpa.c +@@ -301,15 +301,22 @@ ieee80211_crypto_tkip_decrypt(struct iee + } + + +-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, mgmt; + u8 qos_tid; +- u16 len_a; ++ u8 *b_0, *aad; ++ u16 data_len, len_a; + unsigned int hdrlen; + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; + ++ memset(scratch, 0, 6 * AES_BLOCK_SIZE); ++ ++ b_0 = scratch + 3 * AES_BLOCK_SIZE; ++ aad = scratch + 4 * AES_BLOCK_SIZE; ++ + /* + * Mask FC: zero subtype b4 b5 b6 (if not mgmt) + * Retry, PwrMgt, MoreData; set Protected +@@ -331,21 +338,20 @@ static void ccmp_special_blocks(struct s + else + qos_tid = 0; + +- /* In CCM, the initial vectors (IV) used for CTR mode encryption and CBC +- * mode authentication are not allowed to collide, yet both are derived +- * from this vector b_0. We only set L := 1 here to indicate that the +- * data size can be represented in (L+1) bytes. The CCM layer will take +- * care of storing the data length in the top (L+1) bytes and setting +- * and clearing the other bits as is required to derive the two IVs. +- */ +- b_0[0] = 0x1; ++ data_len = skb->len - hdrlen - IEEE80211_CCMP_HDR_LEN; ++ if (encrypted) ++ data_len -= IEEE80211_CCMP_MIC_LEN; + ++ /* First block, b_0 */ ++ b_0[0] = 0x59; /* flags: Adata: 1, M: 011, L: 001 */ + /* Nonce: Nonce Flags | A2 | PN + * Nonce Flags: Priority (b0..b3) | Management (b4) | Reserved (b5..b7) + */ + b_0[1] = qos_tid | (mgmt << 4); + memcpy(&b_0[2], hdr->addr2, ETH_ALEN); + memcpy(&b_0[8], pn, IEEE80211_CCMP_PN_LEN); ++ /* l(m) */ ++ put_unaligned_be16(data_len, &b_0[14]); + + /* AAD (extra authenticate-only data) / masked 802.11 header + * FC | A1 | A2 | A3 | SC | [A4] | [QC] */ +@@ -401,8 +407,7 @@ static int ccmp_encrypt_skb(struct ieee8 + u8 *pos; + u8 pn[6]; + u64 pn64; +- u8 aad[2 * AES_BLOCK_SIZE]; +- u8 b_0[AES_BLOCK_SIZE]; ++ u8 scratch[6 * AES_BLOCK_SIZE]; + + if (info->control.hw_key && + !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) && +@@ -458,9 +463,9 @@ static int ccmp_encrypt_skb(struct ieee8 + return 0; + + 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)); ++ ccmp_special_blocks(skb, pn, scratch, 0); ++ ieee80211_aes_ccm_encrypt(key->u.ccmp.tfm, scratch, pos, len, ++ pos, skb_put(skb, IEEE80211_CCMP_MIC_LEN)); + + return 0; + } +@@ -523,16 +528,16 @@ ieee80211_crypto_ccmp_decrypt(struct iee + } + + if (!(status->flag & RX_FLAG_DECRYPTED)) { +- u8 aad[2 * AES_BLOCK_SIZE]; +- u8 b_0[AES_BLOCK_SIZE]; ++ u8 scratch[6 * AES_BLOCK_SIZE]; + /* hardware didn't decrypt/verify MIC */ +- ccmp_special_blocks(skb, pn, b_0, aad); ++ ccmp_special_blocks(skb, pn, scratch, 1); + + if (ieee80211_aes_ccm_decrypt( +- key->u.ccmp.tfm, b_0, aad, ++ key->u.ccmp.tfm, scratch, + skb->data + hdrlen + IEEE80211_CCMP_HDR_LEN, + data_len, +- skb->data + skb->len - IEEE80211_CCMP_MIC_LEN)) ++ skb->data + skb->len - IEEE80211_CCMP_MIC_LEN, ++ skb->data + hdrlen + IEEE80211_CCMP_HDR_LEN)) + return RX_DROP_UNUSABLE; + } + |