Release 4.11 drivers/staging/rtl8192e/rtllib_crypt_tkip.c
/*
* Host AP crypt: host-based TKIP encryption implementation for Host AP driver
*
* Copyright (c) 2003-2004, Jouni Malinen <jkmaline@cc.hut.fi>
*
* 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. See README and COPYING for
* more details.
*/
#include <crypto/hash.h>
#include <crypto/skcipher.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/random.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/if_ether.h>
#include <linux/if_arp.h>
#include <linux/string.h>
#include <linux/scatterlist.h>
#include <linux/crc32.h>
#include <linux/etherdevice.h>
#include "rtllib.h"
struct rtllib_tkip_data {
#define TKIP_KEY_LEN 32
u8 key[TKIP_KEY_LEN];
int key_set;
u32 tx_iv32;
u16 tx_iv16;
u16 tx_ttak[5];
int tx_phase1_done;
u32 rx_iv32;
u16 rx_iv16;
bool initialized;
u16 rx_ttak[5];
int rx_phase1_done;
u32 rx_iv32_new;
u16 rx_iv16_new;
u32 dot11RSNAStatsTKIPReplays;
u32 dot11RSNAStatsTKIPICVErrors;
u32 dot11RSNAStatsTKIPLocalMICFailures;
int key_idx;
struct crypto_skcipher *rx_tfm_arc4;
struct crypto_ahash *rx_tfm_michael;
struct crypto_skcipher *tx_tfm_arc4;
struct crypto_ahash *tx_tfm_michael;
/* scratch buffers for virt_to_page() (crypto API) */
u8 rx_hdr[16];
u8 tx_hdr[16];
};
static void *rtllib_tkip_init(int key_idx)
{
struct rtllib_tkip_data *priv;
priv = kzalloc(sizeof(*priv), GFP_ATOMIC);
if (priv == NULL)
goto fail;
priv->key_idx = key_idx;
priv->tx_tfm_arc4 = crypto_alloc_skcipher("ecb(arc4)", 0,
CRYPTO_ALG_ASYNC);
if (IS_ERR(priv->tx_tfm_arc4)) {
pr_debug("Could not allocate crypto API arc4\n");
priv->tx_tfm_arc4 = NULL;
goto fail;
}
priv->tx_tfm_michael = crypto_alloc_ahash("michael_mic", 0,
CRYPTO_ALG_ASYNC);
if (IS_ERR(priv->tx_tfm_michael)) {
pr_debug("Could not allocate crypto API michael_mic\n");
priv->tx_tfm_michael = NULL;
goto fail;
}
priv->rx_tfm_arc4 = crypto_alloc_skcipher("ecb(arc4)", 0,
CRYPTO_ALG_ASYNC);
if (IS_ERR(priv->rx_tfm_arc4)) {
pr_debug("Could not allocate crypto API arc4\n");
priv->rx_tfm_arc4 = NULL;
goto fail;
}
priv->rx_tfm_michael = crypto_alloc_ahash("michael_mic", 0,
CRYPTO_ALG_ASYNC);
if (IS_ERR(priv->rx_tfm_michael)) {
pr_debug("Could not allocate crypto API michael_mic\n");
priv->rx_tfm_michael = NULL;
goto fail;
}
return priv;
fail:
if (priv) {
crypto_free_ahash(priv->tx_tfm_michael);
crypto_free_skcipher(priv->tx_tfm_arc4);
crypto_free_ahash(priv->rx_tfm_michael);
crypto_free_skcipher(priv->rx_tfm_arc4);
kfree(priv);
}
return NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 135 | 55.79% | 1 | 16.67% |
| Larry Finger | 89 | 36.78% | 1 | 16.67% |
| Herbert Xu | 8 | 3.31% | 1 | 16.67% |
| Mateusz Kulikowski | 8 | 3.31% | 1 | 16.67% |
| Jiri Kosina | 1 | 0.41% | 1 | 16.67% |
| Thomas Meyer | 1 | 0.41% | 1 | 16.67% |
| Total | 242 | 100.00% | 6 | 100.00% |
static void rtllib_tkip_deinit(void *priv)
{
struct rtllib_tkip_data *_priv = priv;
if (_priv) {
crypto_free_ahash(_priv->tx_tfm_michael);
crypto_free_skcipher(_priv->tx_tfm_arc4);
crypto_free_ahash(_priv->rx_tfm_michael);
crypto_free_skcipher(_priv->rx_tfm_arc4);
}
kfree(priv);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 50 | 89.29% | 1 | 33.33% |
| Herbert Xu | 4 | 7.14% | 1 | 33.33% |
| Larry Finger | 2 | 3.57% | 1 | 33.33% |
| Total | 56 | 100.00% | 3 | 100.00% |
static inline u16 RotR1(u16 val)
{
return (val >> 1) | (val << 15);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 23 | 100.00% | 1 | 100.00% |
| Total | 23 | 100.00% | 1 | 100.00% |
static inline u8 Lo8(u16 val)
{
return val & 0xff;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
static inline u8 Hi8(u16 val)
{
return val >> 8;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
static inline u16 Lo16(u32 val)
{
return val & 0xffff;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
static inline u16 Hi16(u32 val)
{
return val >> 16;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
static inline u16 Mk16(u8 hi, u8 lo)
{
return lo | (((u16) hi) << 8);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 27 | 100.00% | 1 | 100.00% |
| Total | 27 | 100.00% | 1 | 100.00% |
static inline u16 Mk16_le(u16 *v)
{
return *v;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
static const u16 Sbox[256] = {
0xC6A5, 0xF884, 0xEE99, 0xF68D, 0xFF0D, 0xD6BD, 0xDEB1, 0x9154,
0x6050, 0x0203, 0xCEA9, 0x567D, 0xE719, 0xB562, 0x4DE6, 0xEC9A,
0x8F45, 0x1F9D, 0x8940, 0xFA87, 0xEF15, 0xB2EB, 0x8EC9, 0xFB0B,
0x41EC, 0xB367, 0x5FFD, 0x45EA, 0x23BF, 0x53F7, 0xE496, 0x9B5B,
0x75C2, 0xE11C, 0x3DAE, 0x4C6A, 0x6C5A, 0x7E41, 0xF502, 0x834F,
0x685C, 0x51F4, 0xD134, 0xF908, 0xE293, 0xAB73, 0x6253, 0x2A3F,
0x080C, 0x9552, 0x4665, 0x9D5E, 0x3028, 0x37A1, 0x0A0F, 0x2FB5,
0x0E09, 0x2436, 0x1B9B, 0xDF3D, 0xCD26, 0x4E69, 0x7FCD, 0xEA9F,
0x121B, 0x1D9E, 0x5874, 0x342E, 0x362D, 0xDCB2, 0xB4EE, 0x5BFB,
0xA4F6, 0x764D, 0xB761, 0x7DCE, 0x527B, 0xDD3E, 0x5E71, 0x1397,
0xA6F5, 0xB968, 0x0000, 0xC12C, 0x4060, 0xE31F, 0x79C8, 0xB6ED,
0xD4BE, 0x8D46, 0x67D9, 0x724B, 0x94DE, 0x98D4, 0xB0E8, 0x854A,
0xBB6B, 0xC52A, 0x4FE5, 0xED16, 0x86C5, 0x9AD7, 0x6655, 0x1194,
0x8ACF, 0xE910, 0x0406, 0xFE81, 0xA0F0, 0x7844, 0x25BA, 0x4BE3,
0xA2F3, 0x5DFE, 0x80C0, 0x058A, 0x3FAD, 0x21BC, 0x7048, 0xF104,
0x63DF, 0x77C1, 0xAF75, 0x4263, 0x2030, 0xE51A, 0xFD0E, 0xBF6D,
0x814C, 0x1814, 0x2635, 0xC32F, 0xBEE1, 0x35A2, 0x88CC, 0x2E39,
0x9357, 0x55F2, 0xFC82, 0x7A47, 0xC8AC, 0xBAE7, 0x322B, 0xE695,
0xC0A0, 0x1998, 0x9ED1, 0xA37F, 0x4466, 0x547E, 0x3BAB, 0x0B83,
0x8CCA, 0xC729, 0x6BD3, 0x283C, 0xA779, 0xBCE2, 0x161D, 0xAD76,
0xDB3B, 0x6456, 0x744E, 0x141E, 0x92DB, 0x0C0A, 0x486C, 0xB8E4,
0x9F5D, 0xBD6E, 0x43EF, 0xC4A6, 0x39A8, 0x31A4, 0xD337, 0xF28B,
0xD532, 0x8B43, 0x6E59, 0xDAB7, 0x018C, 0xB164, 0x9CD2, 0x49E0,
0xD8B4, 0xACFA, 0xF307, 0xCF25, 0xCAAF, 0xF48E, 0x47E9, 0x1018,
0x6FD5, 0xF088, 0x4A6F, 0x5C72, 0x3824, 0x57F1, 0x73C7, 0x9751,
0xCB23, 0xA17C, 0xE89C, 0x3E21, 0x96DD, 0x61DC, 0x0D86, 0x0F85,
0xE090, 0x7C42, 0x71C4, 0xCCAA, 0x90D8, 0x0605, 0xF701, 0x1C12,
0xC2A3, 0x6A5F, 0xAEF9, 0x69D0, 0x1791, 0x9958, 0x3A27, 0x27B9,
0xD938, 0xEB13, 0x2BB3, 0x2233, 0xD2BB, 0xA970, 0x0789, 0x33A7,
0x2DB6, 0x3C22, 0x1592, 0xC920, 0x8749, 0xAAFF, 0x5078, 0xA57A,
0x038F, 0x59F8, 0x0980, 0x1A17, 0x65DA, 0xD731, 0x84C6, 0xD0B8,
0x82C3, 0x29B0, 0x5A77, 0x1E11, 0x7BCB, 0xA8FC, 0x6DD6, 0x2C3A,
};
static inline u16 _S_(u16 v)
{
u16 t = Sbox[Hi8(v)];
return Sbox[Lo8(v)] ^ ((t << 8) | (t >> 8));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 44 | 100.00% | 1 | 100.00% |
| Total | 44 | 100.00% | 1 | 100.00% |
#define PHASE1_LOOP_COUNT 8
static void tkip_mixing_phase1(u16 *TTAK, const u8 *TK, const u8 *TA, u32 IV32)
{
int i, j;
/* Initialize the 80-bit TTAK from TSC (IV32) and TA[0..5] */
TTAK[0] = Lo16(IV32);
TTAK[1] = Hi16(IV32);
TTAK[2] = Mk16(TA[1], TA[0]);
TTAK[3] = Mk16(TA[3], TA[2]);
TTAK[4] = Mk16(TA[5], TA[4]);
for (i = 0; i < PHASE1_LOOP_COUNT; i++) {
j = 2 * (i & 1);
TTAK[0] += _S_(TTAK[4] ^ Mk16(TK[1 + j], TK[0 + j]));
TTAK[1] += _S_(TTAK[0] ^ Mk16(TK[5 + j], TK[4 + j]));
TTAK[2] += _S_(TTAK[1] ^ Mk16(TK[9 + j], TK[8 + j]));
TTAK[3] += _S_(TTAK[2] ^ Mk16(TK[13 + j], TK[12 + j]));
TTAK[4] += _S_(TTAK[3] ^ Mk16(TK[1 + j], TK[0 + j])) + i;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 280 | 100.00% | 1 | 100.00% |
| Total | 280 | 100.00% | 1 | 100.00% |
static void tkip_mixing_phase2(u8 *WEPSeed, const u8 *TK, const u16 *TTAK,
u16 IV16)
{
/* Make temporary area overlap WEP seed so that the final copy can be
* avoided on little endian hosts.
*/
u16 *PPK = (u16 *) &WEPSeed[4];
/* Step 1 - make copy of TTAK and bring in TSC */
PPK[0] = TTAK[0];
PPK[1] = TTAK[1];
PPK[2] = TTAK[2];
PPK[3] = TTAK[3];
PPK[4] = TTAK[4];
PPK[5] = TTAK[4] + IV16;
/* Step 2 - 96-bit bijective mixing using S-box */
PPK[0] += _S_(PPK[5] ^ Mk16_le((u16 *) &TK[0]));
PPK[1] += _S_(PPK[0] ^ Mk16_le((u16 *) &TK[2]));
PPK[2] += _S_(PPK[1] ^ Mk16_le((u16 *) &TK[4]));
PPK[3] += _S_(PPK[2] ^ Mk16_le((u16 *) &TK[6]));
PPK[4] += _S_(PPK[3] ^ Mk16_le((u16 *) &TK[8]));
PPK[5] += _S_(PPK[4] ^ Mk16_le((u16 *) &TK[10]));
PPK[0] += RotR1(PPK[5] ^ Mk16_le((u16 *) &TK[12]));
PPK[1] += RotR1(PPK[0] ^ Mk16_le((u16 *) &TK[14]));
PPK[2] += RotR1(PPK[1]);
PPK[3] += RotR1(PPK[2]);
PPK[4] += RotR1(PPK[3]);
PPK[5] += RotR1(PPK[4]);
/* Step 3 - bring in last of TK bits, assign 24-bit WEP IV value
* WEPSeed[0..2] is transmitted as WEP IV
*/
WEPSeed[0] = Hi8(IV16);
WEPSeed[1] = (Hi8(IV16) | 0x20) & 0x7F;
WEPSeed[2] = Lo8(IV16);
WEPSeed[3] = Lo8((PPK[5] ^ Mk16_le((u16 *) &TK[0])) >> 1);
#ifdef __BIG_ENDIAN
{
int i;
for (i = 0; i < 6; i++)
PPK[i] = (PPK[i] << 8) | (PPK[i] >> 8);
}
#endif
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 473 | 99.58% | 1 | 50.00% |
| Mateusz Kulikowski | 2 | 0.42% | 1 | 50.00% |
| Total | 475 | 100.00% | 2 | 100.00% |
static int rtllib_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
{
struct rtllib_tkip_data *tkey = priv;
int len;
u8 *pos;
struct rtllib_hdr_4addr *hdr;
struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb +
MAX_DEV_ADDR_SIZE);
int ret = 0;
u8 rc4key[16], *icv;
u32 crc;
struct scatterlist sg;
if (skb_headroom(skb) < 8 || skb_tailroom(skb) < 4 ||
skb->len < hdr_len)
return -1;
hdr = (struct rtllib_hdr_4addr *) skb->data;
if (!tcb_desc->bHwSec) {
if (!tkey->tx_phase1_done) {
tkip_mixing_phase1(tkey->tx_ttak, tkey->key, hdr->addr2,
tkey->tx_iv32);
tkey->tx_phase1_done = 1;
}
tkip_mixing_phase2(rc4key, tkey->key, tkey->tx_ttak,
tkey->tx_iv16);
} else
tkey->tx_phase1_done = 1;
len = skb->len - hdr_len;
pos = skb_push(skb, 8);
memmove(pos, pos + 8, hdr_len);
pos += hdr_len;
if (tcb_desc->bHwSec) {
*pos++ = Hi8(tkey->tx_iv16);
*pos++ = (Hi8(tkey->tx_iv16) | 0x20) & 0x7F;
*pos++ = Lo8(tkey->tx_iv16);
} else {
*pos++ = rc4key[0];
*pos++ = rc4key[1];
*pos++ = rc4key[2];
}
*pos++ = (tkey->key_idx << 6) | (1 << 5) /* Ext IV included */;
*pos++ = tkey->tx_iv32 & 0xff;
*pos++ = (tkey->tx_iv32 >> 8) & 0xff;
*pos++ = (tkey->tx_iv32 >> 16) & 0xff;
*pos++ = (tkey->tx_iv32 >> 24) & 0xff;
if (!tcb_desc->bHwSec) {
SKCIPHER_REQUEST_ON_STACK(req, tkey->tx_tfm_arc4);
icv = skb_put(skb, 4);
crc = ~crc32_le(~0, pos, len);
icv[0] = crc;
icv[1] = crc >> 8;
icv[2] = crc >> 16;
icv[3] = crc >> 24;
sg_init_one(&sg, pos, len+4);
crypto_skcipher_setkey(tkey->tx_tfm_arc4, rc4key, 16);
skcipher_request_set_tfm(req, tkey->tx_tfm_arc4);
skcipher_request_set_callback(req, 0, NULL, NULL);
skcipher_request_set_crypt(req, &sg, &sg, len + 4, NULL);
ret = crypto_skcipher_encrypt(req);
skcipher_request_zero(req);
}
tkey->tx_iv16++;
if (tkey->tx_iv16 == 0) {
tkey->tx_phase1_done = 0;
tkey->tx_iv32++;
}
if (!tcb_desc->bHwSec)
return ret;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 480 | 88.07% | 1 | 20.00% |
| Herbert Xu | 46 | 8.44% | 1 | 20.00% |
| Larry Finger | 18 | 3.30% | 2 | 40.00% |
| Mike McCormack | 1 | 0.18% | 1 | 20.00% |
| Total | 545 | 100.00% | 5 | 100.00% |
static int rtllib_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
{
struct rtllib_tkip_data *tkey = priv;
u8 keyidx, *pos;
u32 iv32;
u16 iv16;
struct rtllib_hdr_4addr *hdr;
struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb +
MAX_DEV_ADDR_SIZE);
u8 rc4key[16];
u8 icv[4];
u32 crc;
struct scatterlist sg;
int plen;
int err;
if (skb->len < hdr_len + 8 + 4)
return -1;
hdr = (struct rtllib_hdr_4addr *) skb->data;
pos = skb->data + hdr_len;
keyidx = pos[3];
if (!(keyidx & (1 << 5))) {
if (net_ratelimit()) {
netdev_dbg(skb->dev,
"Received packet without ExtIV flag from %pM\n",
hdr->addr2);
}
return -2;
}
keyidx >>= 6;
if (tkey->key_idx != keyidx) {
netdev_dbg(skb->dev,
"RX tkey->key_idx=%d frame keyidx=%d priv=%p\n",
tkey->key_idx, keyidx, priv);
return -6;
}
if (!tkey->key_set) {
if (net_ratelimit()) {
netdev_dbg(skb->dev,
"Received packet from %pM with keyid=%d that does not have a configured key\n",
hdr->addr2, keyidx);
}
return -3;
}
iv16 = (pos[0] << 8) | pos[2];
iv32 = pos[4] | (pos[5] << 8) | (pos[6] << 16) | (pos[7] << 24);
pos += 8;
if (!tcb_desc->bHwSec || (skb->cb[0] == 1)) {
SKCIPHER_REQUEST_ON_STACK(req, tkey->rx_tfm_arc4);
if ((iv32 < tkey->rx_iv32 ||
(iv32 == tkey->rx_iv32 && iv16 <= tkey->rx_iv16)) &&
tkey->initialized) {
if (net_ratelimit()) {
netdev_dbg(skb->dev,
"Replay detected: STA= %pM previous TSC %08x%04x received TSC %08x%04x\n",
hdr->addr2, tkey->rx_iv32,
tkey->rx_iv16, iv32, iv16);
}
tkey->dot11RSNAStatsTKIPReplays++;
return -4;
}
tkey->initialized = true;
if (iv32 != tkey->rx_iv32 || !tkey->rx_phase1_done) {
tkip_mixing_phase1(tkey->rx_ttak, tkey->key,
hdr->addr2, iv32);
tkey->rx_phase1_done = 1;
}
tkip_mixing_phase2(rc4key, tkey->key, tkey->rx_ttak, iv16);
plen = skb->len - hdr_len - 12;
sg_init_one(&sg, pos, plen+4);
crypto_skcipher_setkey(tkey->rx_tfm_arc4, rc4key, 16);
skcipher_request_set_tfm(req, tkey->rx_tfm_arc4);
skcipher_request_set_callback(req, 0, NULL, NULL);
skcipher_request_set_crypt(req, &sg, &sg, plen + 4, NULL);
err = crypto_skcipher_decrypt(req);
skcipher_request_zero(req);
if (err) {
if (net_ratelimit()) {
netdev_dbg(skb->dev,
"Failed to decrypt received packet from %pM\n",
hdr->addr2);
}
return -7;
}
crc = ~crc32_le(~0, pos, plen);
icv[0] = crc;
icv[1] = crc >> 8;
icv[2] = crc >> 16;
icv[3] = crc >> 24;
if (memcmp(icv, pos + plen, 4) != 0) {
if (iv32 != tkey->rx_iv32) {
/* Previously cached Phase1 result was already
* lost, so it needs to be recalculated for the
* next packet.
*/
tkey->rx_phase1_done = 0;
}
if (net_ratelimit()) {
netdev_dbg(skb->dev,
"ICV error detected: STA= %pM\n",
hdr->addr2);
}
tkey->dot11RSNAStatsTKIPICVErrors++;
return -5;
}
}
/* Update real counters only after Michael MIC verification has
* completed
*/
tkey->rx_iv32_new = iv32;
tkey->rx_iv16_new = iv16;
/* Remove IV and ICV */
memmove(skb->data + 8, skb->data, hdr_len);
skb_pull(skb, 8);
skb_trim(skb, skb->len - 4);
return keyidx;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 469 | 65.05% | 1 | 16.67% |
| Larry Finger | 161 | 22.33% | 2 | 33.33% |
| Herbert Xu | 53 | 7.35% | 1 | 16.67% |
| Mateusz Kulikowski | 38 | 5.27% | 2 | 33.33% |
| Total | 721 | 100.00% | 6 | 100.00% |
static int michael_mic(struct crypto_ahash *tfm_michael, u8 *key, u8 *hdr,
u8 *data, size_t data_len, u8 *mic)
{
AHASH_REQUEST_ON_STACK(req, tfm_michael);
struct scatterlist sg[2];
int err;
if (tfm_michael == NULL) {
pr_warn("michael_mic: tfm_michael == NULL\n");
return -1;
}
sg_init_table(sg, 2);
sg_set_buf(&sg[0], hdr, 16);
sg_set_buf(&sg[1], data, data_len);
if (crypto_ahash_setkey(tfm_michael, key, 8))
return -1;
ahash_request_set_tfm(req, tfm_michael);
ahash_request_set_callback(req, 0, NULL, NULL);
ahash_request_set_crypt(req, sg, mic, data_len + 16);
err = crypto_ahash_digest(req);
ahash_request_zero(req);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 97 | 61.39% | 1 | 20.00% |
| Herbert Xu | 45 | 28.48% | 1 | 20.00% |
| Mike McCormack | 11 | 6.96% | 1 | 20.00% |
| Larry Finger | 4 | 2.53% | 1 | 20.00% |
| Mateusz Kulikowski | 1 | 0.63% | 1 | 20.00% |
| Total | 158 | 100.00% | 5 | 100.00% |
static void michael_mic_hdr(struct sk_buff *skb, u8 *hdr)
{
struct rtllib_hdr_4addr *hdr11;
hdr11 = (struct rtllib_hdr_4addr *) skb->data;
switch (le16_to_cpu(hdr11->frame_ctl) &
(RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) {
case RTLLIB_FCTL_TODS:
ether_addr_copy(hdr, hdr11->addr3); /* DA */
ether_addr_copy(hdr + ETH_ALEN, hdr11->addr2); /* SA */
break;
case RTLLIB_FCTL_FROMDS:
ether_addr_copy(hdr, hdr11->addr1); /* DA */
ether_addr_copy(hdr + ETH_ALEN, hdr11->addr3); /* SA */
break;
case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS:
ether_addr_copy(hdr, hdr11->addr3); /* DA */
ether_addr_copy(hdr + ETH_ALEN, hdr11->addr4); /* SA */
break;
case 0:
ether_addr_copy(hdr, hdr11->addr1); /* DA */
ether_addr_copy(hdr + ETH_ALEN, hdr11->addr2); /* SA */
break;
}
hdr[12] = 0; /* priority */
hdr[13] = hdr[14] = hdr[15] = 0; /* reserved */
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 164 | 91.11% | 1 | 33.33% |
| Larry Finger | 8 | 4.44% | 1 | 33.33% |
| Mateusz Kulikowski | 8 | 4.44% | 1 | 33.33% |
| Total | 180 | 100.00% | 3 | 100.00% |
static int rtllib_michael_mic_add(struct sk_buff *skb, int hdr_len, void *priv)
{
struct rtllib_tkip_data *tkey = priv;
u8 *pos;
struct rtllib_hdr_4addr *hdr;
hdr = (struct rtllib_hdr_4addr *) skb->data;
if (skb_tailroom(skb) < 8 || skb->len < hdr_len) {
netdev_dbg(skb->dev,
"Invalid packet for Michael MIC add (tailroom=%d hdr_len=%d skb->len=%d)\n",
skb_tailroom(skb), hdr_len, skb->len);
return -1;
}
michael_mic_hdr(skb, tkey->tx_hdr);
if (RTLLIB_QOS_HAS_SEQ(le16_to_cpu(hdr->frame_ctl)))
tkey->tx_hdr[12] = *(skb->data + hdr_len - 2) & 0x07;
pos = skb_put(skb, 8);
if (michael_mic(tkey->tx_tfm_michael, &tkey->key[16], tkey->tx_hdr,
skb->data + hdr_len, skb->len - 8 - hdr_len, pos))
return -1;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 142 | 78.89% | 1 | 25.00% |
| Larry Finger | 32 | 17.78% | 1 | 25.00% |
| Mateusz Kulikowski | 6 | 3.33% | 2 | 50.00% |
| Total | 180 | 100.00% | 4 | 100.00% |
static void rtllib_michael_mic_failure(struct net_device *dev,
struct rtllib_hdr_4addr *hdr,
int keyidx)
{
union iwreq_data wrqu;
struct iw_michaelmicfailure ev;
/* TODO: needed parameters: count, keyid, key type, TSC */
memset(&ev, 0, sizeof(ev));
ev.flags = keyidx & IW_MICFAILURE_KEY_ID;
if (hdr->addr1[0] & 0x01)
ev.flags |= IW_MICFAILURE_GROUP;
else
ev.flags |= IW_MICFAILURE_PAIRWISE;
ev.src_addr.sa_family = ARPHRD_ETHER;
ether_addr_copy(ev.src_addr.sa_data, hdr->addr2);
memset(&wrqu, 0, sizeof(wrqu));
wrqu.data.length = sizeof(ev);
wireless_send_event(dev, IWEVMICHAELMICFAILURE, &wrqu, (char *) &ev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 132 | 97.78% | 1 | 33.33% |
| Larry Finger | 2 | 1.48% | 1 | 33.33% |
| Mateusz Kulikowski | 1 | 0.74% | 1 | 33.33% |
| Total | 135 | 100.00% | 3 | 100.00% |
static int rtllib_michael_mic_verify(struct sk_buff *skb, int keyidx,
int hdr_len, void *priv)
{
struct rtllib_tkip_data *tkey = priv;
u8 mic[8];
struct rtllib_hdr_4addr *hdr;
hdr = (struct rtllib_hdr_4addr *) skb->data;
if (!tkey->key_set)
return -1;
michael_mic_hdr(skb, tkey->rx_hdr);
if (RTLLIB_QOS_HAS_SEQ(le16_to_cpu(hdr->frame_ctl)))
tkey->rx_hdr[12] = *(skb->data + hdr_len - 2) & 0x07;
if (michael_mic(tkey->rx_tfm_michael, &tkey->key[24], tkey->rx_hdr,
skb->data + hdr_len, skb->len - 8 - hdr_len, mic))
return -1;
if (memcmp(mic, skb->data + skb->len - 8, 8) != 0) {
struct rtllib_hdr_4addr *hdr;
hdr = (struct rtllib_hdr_4addr *) skb->data;
netdev_dbg(skb->dev,
"Michael MIC verification failed for MSDU from %pM keyidx=%d\n",
hdr->addr2, keyidx);
netdev_dbg(skb->dev, "%d\n",
memcmp(mic, skb->data + skb->len - 8, 8) != 0);
if (skb->dev) {
pr_info("skb->dev != NULL\n");
rtllib_michael_mic_failure(skb->dev, hdr, keyidx);
}
tkey->dot11RSNAStatsTKIPLocalMICFailures++;
return -1;
}
/* Update TSC counters for RX now that the packet verification has
* completed.
*/
tkey->rx_iv32 = tkey->rx_iv32_new;
tkey->rx_iv16 = tkey->rx_iv16_new;
skb_trim(skb, skb->len - 8);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 242 | 83.74% | 1 | 16.67% |
| Larry Finger | 36 | 12.46% | 1 | 16.67% |
| Mateusz Kulikowski | 10 | 3.46% | 3 | 50.00% |
| Sean MacLennan | 1 | 0.35% | 1 | 16.67% |
| Total | 289 | 100.00% | 6 | 100.00% |
static int rtllib_tkip_set_key(void *key, int len, u8 *seq, void *priv)
{
struct rtllib_tkip_data *tkey = priv;
int keyidx;
struct crypto_ahash *tfm = tkey->tx_tfm_michael;
struct crypto_skcipher *tfm2 = tkey->tx_tfm_arc4;
struct crypto_ahash *tfm3 = tkey->rx_tfm_michael;
struct crypto_skcipher *tfm4 = tkey->rx_tfm_arc4;
keyidx = tkey->key_idx;
memset(tkey, 0, sizeof(*tkey));
tkey->key_idx = keyidx;
tkey->tx_tfm_michael = tfm;
tkey->tx_tfm_arc4 = tfm2;
tkey->rx_tfm_michael = tfm3;
tkey->rx_tfm_arc4 = tfm4;
if (len == TKIP_KEY_LEN) {
memcpy(tkey->key, key, TKIP_KEY_LEN);
tkey->key_set = 1;
tkey->tx_iv16 = 1; /* TSC is initialized to 1 */
if (seq) {
tkey->rx_iv32 = (seq[5] << 24) | (seq[4] << 16) |
(seq[3] << 8) | seq[2];
tkey->rx_iv16 = (seq[1] << 8) | seq[0];
}
} else if (len == 0)
tkey->key_set = 0;
else
return -1;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 223 | 97.38% | 1 | 33.33% |
| Herbert Xu | 4 | 1.75% | 1 | 33.33% |
| Larry Finger | 2 | 0.87% | 1 | 33.33% |
| Total | 229 | 100.00% | 3 | 100.00% |
static int rtllib_tkip_get_key(void *key, int len, u8 *seq, void *priv)
{
struct rtllib_tkip_data *tkey = priv;
if (len < TKIP_KEY_LEN)
return -1;
if (!tkey->key_set)
return 0;
memcpy(key, tkey->key, TKIP_KEY_LEN);
if (seq) {
/* Return the sequence number of the last transmitted frame. */
u16 iv16 = tkey->tx_iv16;
u32 iv32 = tkey->tx_iv32;
if (iv16 == 0)
iv32--;
iv16--;
seq[0] = tkey->tx_iv16;
seq[1] = tkey->tx_iv16 >> 8;
seq[2] = tkey->tx_iv32;
seq[3] = tkey->tx_iv32 >> 8;
seq[4] = tkey->tx_iv32 >> 16;
seq[5] = tkey->tx_iv32 >> 24;
}
return TKIP_KEY_LEN;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 155 | 98.73% | 1 | 50.00% |
| Larry Finger | 2 | 1.27% | 1 | 50.00% |
| Total | 157 | 100.00% | 2 | 100.00% |
static void rtllib_tkip_print_stats(struct seq_file *m, void *priv)
{
struct rtllib_tkip_data *tkip = priv;
seq_printf(m,
"key[%d] alg=TKIP key_set=%d tx_pn=%02x%02x%02x%02x%02x%02x rx_pn=%02x%02x%02x%02x%02x%02x replays=%d icv_errors=%d local_mic_failures=%d\n",
tkip->key_idx, tkip->key_set,
(tkip->tx_iv32 >> 24) & 0xff,
(tkip->tx_iv32 >> 16) & 0xff,
(tkip->tx_iv32 >> 8) & 0xff,
tkip->tx_iv32 & 0xff,
(tkip->tx_iv16 >> 8) & 0xff,
tkip->tx_iv16 & 0xff,
(tkip->rx_iv32 >> 24) & 0xff,
(tkip->rx_iv32 >> 16) & 0xff,
(tkip->rx_iv32 >> 8) & 0xff,
tkip->rx_iv32 & 0xff,
(tkip->rx_iv16 >> 8) & 0xff,
tkip->rx_iv16 & 0xff,
tkip->dot11RSNAStatsTKIPReplays,
tkip->dot11RSNAStatsTKIPICVErrors,
tkip->dot11RSNAStatsTKIPLocalMICFailures);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 144 | 94.12% | 1 | 25.00% |
| David Howells | 6 | 3.92% | 1 | 25.00% |
| Larry Finger | 2 | 1.31% | 1 | 25.00% |
| Mateusz Kulikowski | 1 | 0.65% | 1 | 25.00% |
| Total | 153 | 100.00% | 4 | 100.00% |
static struct lib80211_crypto_ops rtllib_crypt_tkip = {
.name = "R-TKIP",
.init = rtllib_tkip_init,
.deinit = rtllib_tkip_deinit,
.encrypt_mpdu = rtllib_tkip_encrypt,
.decrypt_mpdu = rtllib_tkip_decrypt,
.encrypt_msdu = rtllib_michael_mic_add,
.decrypt_msdu = rtllib_michael_mic_verify,
.set_key = rtllib_tkip_set_key,
.get_key = rtllib_tkip_get_key,
.print_stats = rtllib_tkip_print_stats,
.extra_mpdu_prefix_len = 4 + 4, /* IV + ExtIV */
.extra_mpdu_postfix_len = 4, /* ICV */
.extra_msdu_postfix_len = 8, /* MIC */
.owner = THIS_MODULE,
};
static int __init rtllib_crypto_tkip_init(void)
{
return lib80211_register_crypto_ops(&rtllib_crypt_tkip);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 12 | 75.00% | 1 | 25.00% |
| Larry Finger | 2 | 12.50% | 1 | 25.00% |
| Sean MacLennan | 1 | 6.25% | 1 | 25.00% |
| Rashika Kheria | 1 | 6.25% | 1 | 25.00% |
| Total | 16 | 100.00% | 4 | 100.00% |
static void __exit rtllib_crypto_tkip_exit(void)
{
lib80211_unregister_crypto_ops(&rtllib_crypt_tkip);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 10 | 66.67% | 1 | 25.00% |
| Larry Finger | 3 | 20.00% | 1 | 25.00% |
| Sean MacLennan | 1 | 6.67% | 1 | 25.00% |
| Rashika Kheria | 1 | 6.67% | 1 | 25.00% |
| Total | 15 | 100.00% | 4 | 100.00% |
module_init(rtllib_crypto_tkip_init);
module_exit(rtllib_crypto_tkip_exit);
MODULE_LICENSE("GPL");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Greg Kroah-Hartman | 4085 | 85.62% | 1 | 5.26% |
| Larry Finger | 385 | 8.07% | 3 | 15.79% |
| Herbert Xu | 170 | 3.56% | 1 | 5.26% |
| Mateusz Kulikowski | 80 | 1.68% | 6 | 31.58% |
| Sean MacLennan | 29 | 0.61% | 3 | 15.79% |
| Mike McCormack | 12 | 0.25% | 1 | 5.26% |
| David Howells | 6 | 0.13% | 1 | 5.26% |
| Rashika Kheria | 2 | 0.04% | 1 | 5.26% |
| Thomas Meyer | 1 | 0.02% | 1 | 5.26% |
| Jiri Kosina | 1 | 0.02% | 1 | 5.26% |
| Total | 4771 | 100.00% | 19 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.