blob: 757e4eb2baf7d97a9b07cfdffc0451199a832baf [file] [log] [blame]
Jiri Bencf0706e82007-05-05 11:45:53 -07001/*
2 * Copyright 2002-2004, Instant802 Networks, Inc.
3 * Copyright 2005, Devicescape Software, Inc.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
Jiri Bencf0706e82007-05-05 11:45:53 -07009#include <linux/kernel.h>
Harvey Harrison8c046c82008-05-02 13:47:45 -070010#include <linux/bitops.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070011#include <linux/types.h>
12#include <linux/netdevice.h>
Harvey Harrison8c046c82008-05-02 13:47:45 -070013#include <asm/unaligned.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070014
15#include <net/mac80211.h>
Johannes Berg24487982009-04-23 18:52:52 +020016#include "driver-ops.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040017#include "key.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070018#include "tkip.h"
19#include "wep.h"
20
Jiri Bencf0706e82007-05-05 11:45:53 -070021#define PHASE1_LOOP_COUNT 8
22
Harvey Harrison8c046c82008-05-02 13:47:45 -070023/*
24 * 2-byte by 2-byte subset of the full AES S-box table; second part of this
25 * table is identical to first part but byte-swapped
26 */
Jiri Bencf0706e82007-05-05 11:45:53 -070027static const u16 tkip_sbox[256] =
28{
29 0xC6A5, 0xF884, 0xEE99, 0xF68D, 0xFF0D, 0xD6BD, 0xDEB1, 0x9154,
30 0x6050, 0x0203, 0xCEA9, 0x567D, 0xE719, 0xB562, 0x4DE6, 0xEC9A,
31 0x8F45, 0x1F9D, 0x8940, 0xFA87, 0xEF15, 0xB2EB, 0x8EC9, 0xFB0B,
32 0x41EC, 0xB367, 0x5FFD, 0x45EA, 0x23BF, 0x53F7, 0xE496, 0x9B5B,
33 0x75C2, 0xE11C, 0x3DAE, 0x4C6A, 0x6C5A, 0x7E41, 0xF502, 0x834F,
34 0x685C, 0x51F4, 0xD134, 0xF908, 0xE293, 0xAB73, 0x6253, 0x2A3F,
35 0x080C, 0x9552, 0x4665, 0x9D5E, 0x3028, 0x37A1, 0x0A0F, 0x2FB5,
36 0x0E09, 0x2436, 0x1B9B, 0xDF3D, 0xCD26, 0x4E69, 0x7FCD, 0xEA9F,
37 0x121B, 0x1D9E, 0x5874, 0x342E, 0x362D, 0xDCB2, 0xB4EE, 0x5BFB,
38 0xA4F6, 0x764D, 0xB761, 0x7DCE, 0x527B, 0xDD3E, 0x5E71, 0x1397,
39 0xA6F5, 0xB968, 0x0000, 0xC12C, 0x4060, 0xE31F, 0x79C8, 0xB6ED,
40 0xD4BE, 0x8D46, 0x67D9, 0x724B, 0x94DE, 0x98D4, 0xB0E8, 0x854A,
41 0xBB6B, 0xC52A, 0x4FE5, 0xED16, 0x86C5, 0x9AD7, 0x6655, 0x1194,
42 0x8ACF, 0xE910, 0x0406, 0xFE81, 0xA0F0, 0x7844, 0x25BA, 0x4BE3,
43 0xA2F3, 0x5DFE, 0x80C0, 0x058A, 0x3FAD, 0x21BC, 0x7048, 0xF104,
44 0x63DF, 0x77C1, 0xAF75, 0x4263, 0x2030, 0xE51A, 0xFD0E, 0xBF6D,
45 0x814C, 0x1814, 0x2635, 0xC32F, 0xBEE1, 0x35A2, 0x88CC, 0x2E39,
46 0x9357, 0x55F2, 0xFC82, 0x7A47, 0xC8AC, 0xBAE7, 0x322B, 0xE695,
47 0xC0A0, 0x1998, 0x9ED1, 0xA37F, 0x4466, 0x547E, 0x3BAB, 0x0B83,
48 0x8CCA, 0xC729, 0x6BD3, 0x283C, 0xA779, 0xBCE2, 0x161D, 0xAD76,
49 0xDB3B, 0x6456, 0x744E, 0x141E, 0x92DB, 0x0C0A, 0x486C, 0xB8E4,
50 0x9F5D, 0xBD6E, 0x43EF, 0xC4A6, 0x39A8, 0x31A4, 0xD337, 0xF28B,
51 0xD532, 0x8B43, 0x6E59, 0xDAB7, 0x018C, 0xB164, 0x9CD2, 0x49E0,
52 0xD8B4, 0xACFA, 0xF307, 0xCF25, 0xCAAF, 0xF48E, 0x47E9, 0x1018,
53 0x6FD5, 0xF088, 0x4A6F, 0x5C72, 0x3824, 0x57F1, 0x73C7, 0x9751,
54 0xCB23, 0xA17C, 0xE89C, 0x3E21, 0x96DD, 0x61DC, 0x0D86, 0x0F85,
55 0xE090, 0x7C42, 0x71C4, 0xCCAA, 0x90D8, 0x0605, 0xF701, 0x1C12,
56 0xC2A3, 0x6A5F, 0xAEF9, 0x69D0, 0x1791, 0x9958, 0x3A27, 0x27B9,
57 0xD938, 0xEB13, 0x2BB3, 0x2233, 0xD2BB, 0xA970, 0x0789, 0x33A7,
58 0x2DB6, 0x3C22, 0x1592, 0xC920, 0x8749, 0xAAFF, 0x5078, 0xA57A,
59 0x038F, 0x59F8, 0x0980, 0x1A17, 0x65DA, 0xD731, 0x84C6, 0xD0B8,
60 0x82C3, 0x29B0, 0x5A77, 0x1E11, 0x7BCB, 0xA8FC, 0x6DD6, 0x2C3A,
61};
62
Harvey Harrison8c046c82008-05-02 13:47:45 -070063static u16 tkipS(u16 val)
Jiri Bencf0706e82007-05-05 11:45:53 -070064{
Harvey Harrison8c046c82008-05-02 13:47:45 -070065 return tkip_sbox[val & 0xff] ^ swab16(tkip_sbox[val >> 8]);
Jiri Bencf0706e82007-05-05 11:45:53 -070066}
67
Harvey Harrisonc8012422008-06-11 14:22:00 -070068static u8 *write_tkip_iv(u8 *pos, u16 iv16)
69{
70 *pos++ = iv16 >> 8;
71 *pos++ = ((iv16 >> 8) | 0x20) & 0x7f;
72 *pos++ = iv16 & 0xFF;
73 return pos;
74}
75
Harvey Harrison8c046c82008-05-02 13:47:45 -070076/*
77 * P1K := Phase1(TA, TK, TSC)
Jiri Bencf0706e82007-05-05 11:45:53 -070078 * TA = transmitter address (48 bits)
79 * TK = dot11DefaultKeyValue or dot11KeyMappingValue (128 bits)
80 * TSC = TKIP sequence counter (48 bits, only 32 msb bits used)
81 * P1K: 80 bits
82 */
Harvey Harrison7c705372008-06-11 14:22:00 -070083static void tkip_mixing_phase1(const u8 *tk, struct tkip_ctx *ctx,
84 const u8 *ta, u32 tsc_IV32)
Jiri Bencf0706e82007-05-05 11:45:53 -070085{
86 int i, j;
Harvey Harrison82a57442008-05-14 16:26:19 -070087 u16 *p1k = ctx->p1k;
Jiri Bencf0706e82007-05-05 11:45:53 -070088
Harvey Harrison8c046c82008-05-02 13:47:45 -070089 p1k[0] = tsc_IV32 & 0xFFFF;
90 p1k[1] = tsc_IV32 >> 16;
91 p1k[2] = get_unaligned_le16(ta + 0);
92 p1k[3] = get_unaligned_le16(ta + 2);
93 p1k[4] = get_unaligned_le16(ta + 4);
Jiri Bencf0706e82007-05-05 11:45:53 -070094
95 for (i = 0; i < PHASE1_LOOP_COUNT; i++) {
96 j = 2 * (i & 1);
Harvey Harrison8c046c82008-05-02 13:47:45 -070097 p1k[0] += tkipS(p1k[4] ^ get_unaligned_le16(tk + 0 + j));
98 p1k[1] += tkipS(p1k[0] ^ get_unaligned_le16(tk + 4 + j));
99 p1k[2] += tkipS(p1k[1] ^ get_unaligned_le16(tk + 8 + j));
100 p1k[3] += tkipS(p1k[2] ^ get_unaligned_le16(tk + 12 + j));
101 p1k[4] += tkipS(p1k[3] ^ get_unaligned_le16(tk + 0 + j)) + i;
Jiri Bencf0706e82007-05-05 11:45:53 -0700102 }
gregor kowskica998612009-12-09 23:25:05 +0100103 ctx->state = TKIP_STATE_PHASE1_DONE;
Jiri Bencf0706e82007-05-05 11:45:53 -0700104}
105
Harvey Harrison7c705372008-06-11 14:22:00 -0700106static void tkip_mixing_phase2(const u8 *tk, struct tkip_ctx *ctx,
Harvey Harrison3c838092008-05-14 16:26:20 -0700107 u16 tsc_IV16, u8 *rc4key)
Jiri Bencf0706e82007-05-05 11:45:53 -0700108{
109 u16 ppk[6];
Harvey Harrison3c838092008-05-14 16:26:20 -0700110 const u16 *p1k = ctx->p1k;
Jiri Bencf0706e82007-05-05 11:45:53 -0700111 int i;
112
113 ppk[0] = p1k[0];
114 ppk[1] = p1k[1];
115 ppk[2] = p1k[2];
116 ppk[3] = p1k[3];
117 ppk[4] = p1k[4];
118 ppk[5] = p1k[4] + tsc_IV16;
119
Harvey Harrison8c046c82008-05-02 13:47:45 -0700120 ppk[0] += tkipS(ppk[5] ^ get_unaligned_le16(tk + 0));
121 ppk[1] += tkipS(ppk[0] ^ get_unaligned_le16(tk + 2));
122 ppk[2] += tkipS(ppk[1] ^ get_unaligned_le16(tk + 4));
123 ppk[3] += tkipS(ppk[2] ^ get_unaligned_le16(tk + 6));
124 ppk[4] += tkipS(ppk[3] ^ get_unaligned_le16(tk + 8));
125 ppk[5] += tkipS(ppk[4] ^ get_unaligned_le16(tk + 10));
126 ppk[0] += ror16(ppk[5] ^ get_unaligned_le16(tk + 12), 1);
127 ppk[1] += ror16(ppk[0] ^ get_unaligned_le16(tk + 14), 1);
128 ppk[2] += ror16(ppk[1], 1);
129 ppk[3] += ror16(ppk[2], 1);
130 ppk[4] += ror16(ppk[3], 1);
131 ppk[5] += ror16(ppk[4], 1);
Jiri Bencf0706e82007-05-05 11:45:53 -0700132
Harvey Harrisonc8012422008-06-11 14:22:00 -0700133 rc4key = write_tkip_iv(rc4key, tsc_IV16);
134 *rc4key++ = ((ppk[5] ^ get_unaligned_le16(tk)) >> 1) & 0xFF;
Jiri Bencf0706e82007-05-05 11:45:53 -0700135
Harvey Harrison8c046c82008-05-02 13:47:45 -0700136 for (i = 0; i < 6; i++)
137 put_unaligned_le16(ppk[i], rc4key + 2 * i);
Jiri Bencf0706e82007-05-05 11:45:53 -0700138}
139
Jiri Bencf0706e82007-05-05 11:45:53 -0700140/* Add TKIP IV and Ext. IV at @pos. @iv0, @iv1, and @iv2 are the first octets
141 * of the IV. Returns pointer to the octet following IVs (i.e., beginning of
142 * the packet payload). */
Harvey Harrisonc8012422008-06-11 14:22:00 -0700143u8 *ieee80211_tkip_add_iv(u8 *pos, struct ieee80211_key *key, u16 iv16)
Jiri Bencf0706e82007-05-05 11:45:53 -0700144{
Harvey Harrisonc8012422008-06-11 14:22:00 -0700145 pos = write_tkip_iv(pos, iv16);
Johannes Berg8f20fc22007-08-28 17:01:54 -0400146 *pos++ = (key->conf.keyidx << 6) | (1 << 5) /* Ext IV */;
Harvey Harrisonb0f76b32008-05-14 16:26:19 -0700147 put_unaligned_le32(key->u.tkip.tx.iv32, pos);
Harvey Harrison8c046c82008-05-02 13:47:45 -0700148 return pos + 4;
Jiri Bencf0706e82007-05-05 11:45:53 -0700149}
150
Emmanuel Grumbach5d2cdcd2008-03-20 15:06:41 +0200151void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf,
152 struct sk_buff *skb, enum ieee80211_tkip_key_type type,
153 u8 *outkey)
154{
155 struct ieee80211_key *key = (struct ieee80211_key *)
156 container_of(keyconf, struct ieee80211_key, conf);
Harvey Harrisonc644bce2008-06-11 14:22:02 -0700157 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
158 u8 *data;
159 const u8 *tk;
160 struct tkip_ctx *ctx;
Emmanuel Grumbach5d2cdcd2008-03-20 15:06:41 +0200161 u16 iv16;
162 u32 iv32;
163
Harvey Harrisonc644bce2008-06-11 14:22:02 -0700164 data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control);
165 iv16 = data[2] | (data[0] << 8);
166 iv32 = get_unaligned_le32(&data[4]);
167
Luis R. Rodriguezffd78912008-06-21 10:02:46 -0400168 tk = &key->conf.key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY];
Harvey Harrisonc644bce2008-06-11 14:22:02 -0700169 ctx = &key->u.tkip.tx;
Emmanuel Grumbach5d2cdcd2008-03-20 15:06:41 +0200170
Johannes Berg9ae705c2008-06-20 11:54:24 +0200171#ifdef CONFIG_MAC80211_TKIP_DEBUG
Emmanuel Grumbach5d2cdcd2008-03-20 15:06:41 +0200172 printk(KERN_DEBUG "TKIP encrypt: iv16 = 0x%04x, iv32 = 0x%08x\n",
173 iv16, iv32);
174
Harvey Harrisonc644bce2008-06-11 14:22:02 -0700175 if (iv32 != ctx->iv32) {
Emmanuel Grumbach5d2cdcd2008-03-20 15:06:41 +0200176 printk(KERN_DEBUG "skb: iv32 = 0x%08x key: iv32 = 0x%08x\n",
Harvey Harrisonc644bce2008-06-11 14:22:02 -0700177 iv32, ctx->iv32);
Emmanuel Grumbach5d2cdcd2008-03-20 15:06:41 +0200178 printk(KERN_DEBUG "Wrap around of iv16 in the middle of a "
179 "fragmented packet\n");
180 }
Johannes Berg9ae705c2008-06-20 11:54:24 +0200181#endif
Emmanuel Grumbach5d2cdcd2008-03-20 15:06:41 +0200182
183 /* Update the p1k only when the iv16 in the packet wraps around, this
184 * might occur after the wrap around of iv16 in the key in case of
185 * fragmented packets. */
gregor kowskica998612009-12-09 23:25:05 +0100186 if (iv16 == 0 || ctx->state == TKIP_STATE_NOT_INIT)
Harvey Harrisonc644bce2008-06-11 14:22:02 -0700187 tkip_mixing_phase1(tk, ctx, hdr->addr2, iv32);
Emmanuel Grumbach5d2cdcd2008-03-20 15:06:41 +0200188
189 if (type == IEEE80211_TKIP_P1_KEY) {
Harvey Harrisonc644bce2008-06-11 14:22:02 -0700190 memcpy(outkey, ctx->p1k, sizeof(u16) * 5);
Emmanuel Grumbach5d2cdcd2008-03-20 15:06:41 +0200191 return;
192 }
193
Harvey Harrisonc644bce2008-06-11 14:22:02 -0700194 tkip_mixing_phase2(tk, ctx, iv16, outkey);
Emmanuel Grumbach5d2cdcd2008-03-20 15:06:41 +0200195}
196EXPORT_SYMBOL(ieee80211_get_tkip_key);
197
Johannes Berg813d7662010-01-17 01:47:58 +0100198/*
199 * Encrypt packet payload with TKIP using @key. @pos is a pointer to the
Jiri Bencf0706e82007-05-05 11:45:53 -0700200 * beginning of the buffer containing payload. This payload must include
Johannes Berg813d7662010-01-17 01:47:58 +0100201 * the IV/Ext.IV and space for (taildroom) four octets for ICV.
202 * @payload_len is the length of payload (_not_ including IV/ICV length).
203 * @ta is the transmitter addresses.
204 */
Felix Fietkau5f9f1812011-03-25 21:39:19 +0100205int ieee80211_tkip_encrypt_data(struct crypto_cipher *tfm,
John W. Linville34731872010-07-07 15:07:49 -0400206 struct ieee80211_key *key,
207 u8 *pos, size_t payload_len, u8 *ta)
Jiri Bencf0706e82007-05-05 11:45:53 -0700208{
209 u8 rc4key[16];
Harvey Harrison7c705372008-06-11 14:22:00 -0700210 struct tkip_ctx *ctx = &key->u.tkip.tx;
Luis R. Rodriguezffd78912008-06-21 10:02:46 -0400211 const u8 *tk = &key->conf.key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY];
Jiri Bencf0706e82007-05-05 11:45:53 -0700212
Harvey Harrison7c705372008-06-11 14:22:00 -0700213 /* Calculate per-packet key */
gregor kowskica998612009-12-09 23:25:05 +0100214 if (ctx->iv16 == 0 || ctx->state == TKIP_STATE_NOT_INIT)
Harvey Harrison7c705372008-06-11 14:22:00 -0700215 tkip_mixing_phase1(tk, ctx, ta, ctx->iv32);
216
217 tkip_mixing_phase2(tk, ctx, ctx->iv16, rc4key);
218
John W. Linville34731872010-07-07 15:07:49 -0400219 return ieee80211_wep_encrypt_data(tfm, rc4key, 16, pos, payload_len);
Jiri Bencf0706e82007-05-05 11:45:53 -0700220}
221
Jiri Bencf0706e82007-05-05 11:45:53 -0700222/* Decrypt packet payload with TKIP using @key. @pos is a pointer to the
223 * beginning of the buffer containing IEEE 802.11 header payload, i.e.,
224 * including IV, Ext. IV, real data, Michael MIC, ICV. @payload_len is the
225 * length of payload, including IV, Ext. IV, MIC, ICV. */
Felix Fietkau5f9f1812011-03-25 21:39:19 +0100226int ieee80211_tkip_decrypt_data(struct crypto_cipher *tfm,
Jiri Bencf0706e82007-05-05 11:45:53 -0700227 struct ieee80211_key *key,
228 u8 *payload, size_t payload_len, u8 *ta,
Emmanuel Grumbach9ae4fda2008-03-20 15:06:42 +0200229 u8 *ra, int only_iv, int queue,
Johannes Berg50741ae2007-09-26 15:19:45 +0200230 u32 *out_iv32, u16 *out_iv16)
Jiri Bencf0706e82007-05-05 11:45:53 -0700231{
232 u32 iv32;
233 u32 iv16;
234 u8 rc4key[16], keyid, *pos = payload;
235 int res;
Luis R. Rodriguezffd78912008-06-21 10:02:46 -0400236 const u8 *tk = &key->conf.key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY];
Jiri Bencf0706e82007-05-05 11:45:53 -0700237
238 if (payload_len < 12)
239 return -1;
240
241 iv16 = (pos[0] << 8) | pos[2];
242 keyid = pos[3];
Harvey Harrison8c046c82008-05-02 13:47:45 -0700243 iv32 = get_unaligned_le32(pos + 4);
Jiri Bencf0706e82007-05-05 11:45:53 -0700244 pos += 8;
Johannes Berg9ae705c2008-06-20 11:54:24 +0200245#ifdef CONFIG_MAC80211_TKIP_DEBUG
Jiri Bencf0706e82007-05-05 11:45:53 -0700246 {
247 int i;
248 printk(KERN_DEBUG "TKIP decrypt: data(len=%zd)", payload_len);
249 for (i = 0; i < payload_len; i++)
250 printk(" %02x", payload[i]);
251 printk("\n");
252 printk(KERN_DEBUG "TKIP decrypt: iv16=%04x iv32=%08x\n",
253 iv16, iv32);
254 }
Johannes Berg9ae705c2008-06-20 11:54:24 +0200255#endif
Jiri Bencf0706e82007-05-05 11:45:53 -0700256
257 if (!(keyid & (1 << 5)))
258 return TKIP_DECRYPT_NO_EXT_IV;
259
Johannes Berg8f20fc22007-08-28 17:01:54 -0400260 if ((keyid >> 6) != key->conf.keyidx)
Jiri Bencf0706e82007-05-05 11:45:53 -0700261 return TKIP_DECRYPT_INVALID_KEYIDX;
262
gregor kowskica998612009-12-09 23:25:05 +0100263 if (key->u.tkip.rx[queue].state != TKIP_STATE_NOT_INIT &&
Harvey Harrisonb0f76b32008-05-14 16:26:19 -0700264 (iv32 < key->u.tkip.rx[queue].iv32 ||
265 (iv32 == key->u.tkip.rx[queue].iv32 &&
266 iv16 <= key->u.tkip.rx[queue].iv16))) {
Johannes Berg9ae705c2008-06-20 11:54:24 +0200267#ifdef CONFIG_MAC80211_TKIP_DEBUG
Jiri Bencf0706e82007-05-05 11:45:53 -0700268 printk(KERN_DEBUG "TKIP replay detected for RX frame from "
Johannes Berg0c68ae262008-10-27 15:56:10 -0700269 "%pM (RX IV (%04x,%02x) <= prev. IV (%04x,%02x)\n",
270 ta,
Harvey Harrisonb0f76b32008-05-14 16:26:19 -0700271 iv32, iv16, key->u.tkip.rx[queue].iv32,
272 key->u.tkip.rx[queue].iv16);
Johannes Berg9ae705c2008-06-20 11:54:24 +0200273#endif
Jiri Bencf0706e82007-05-05 11:45:53 -0700274 return TKIP_DECRYPT_REPLAY;
275 }
276
277 if (only_iv) {
278 res = TKIP_DECRYPT_OK;
gregor kowskica998612009-12-09 23:25:05 +0100279 key->u.tkip.rx[queue].state = TKIP_STATE_PHASE1_HW_UPLOADED;
Jiri Bencf0706e82007-05-05 11:45:53 -0700280 goto done;
281 }
282
gregor kowskica998612009-12-09 23:25:05 +0100283 if (key->u.tkip.rx[queue].state == TKIP_STATE_NOT_INIT ||
Harvey Harrisonb0f76b32008-05-14 16:26:19 -0700284 key->u.tkip.rx[queue].iv32 != iv32) {
Jiri Bencf0706e82007-05-05 11:45:53 -0700285 /* IV16 wrapped around - perform TKIP phase 1 */
Harvey Harrison7c705372008-06-11 14:22:00 -0700286 tkip_mixing_phase1(tk, &key->u.tkip.rx[queue], ta, iv32);
Johannes Berg9ae705c2008-06-20 11:54:24 +0200287#ifdef CONFIG_MAC80211_TKIP_DEBUG
Jiri Bencf0706e82007-05-05 11:45:53 -0700288 {
289 int i;
Luis R. Rodriguezffd78912008-06-21 10:02:46 -0400290 u8 key_offset = NL80211_TKIP_DATA_OFFSET_ENCR_KEY;
Johannes Berg0c68ae262008-10-27 15:56:10 -0700291 printk(KERN_DEBUG "TKIP decrypt: Phase1 TA=%pM"
292 " TK=", ta);
Jiri Bencf0706e82007-05-05 11:45:53 -0700293 for (i = 0; i < 16; i++)
294 printk("%02x ",
Luis R. Rodriguezffd78912008-06-21 10:02:46 -0400295 key->conf.key[key_offset + i]);
Jiri Bencf0706e82007-05-05 11:45:53 -0700296 printk("\n");
297 printk(KERN_DEBUG "TKIP decrypt: P1K=");
298 for (i = 0; i < 5; i++)
Harvey Harrisonb0f76b32008-05-14 16:26:19 -0700299 printk("%04x ", key->u.tkip.rx[queue].p1k[i]);
Jiri Bencf0706e82007-05-05 11:45:53 -0700300 printk("\n");
301 }
Johannes Berg9ae705c2008-06-20 11:54:24 +0200302#endif
gregor kowskica998612009-12-09 23:25:05 +0100303 }
304 if (key->local->ops->update_tkip_key &&
305 key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
306 key->u.tkip.rx[queue].state != TKIP_STATE_PHASE1_HW_UPLOADED) {
Johannes Bergb3fbdcf2010-01-21 11:40:47 +0100307 struct ieee80211_sub_if_data *sdata = key->sdata;
Emmanuel Grumbach9ae4fda2008-03-20 15:06:42 +0200308
Johannes Bergb3fbdcf2010-01-21 11:40:47 +0100309 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
310 sdata = container_of(key->sdata->bss,
311 struct ieee80211_sub_if_data, u.ap);
312 drv_update_tkip_key(key->local, sdata, &key->conf, key->sta,
gregor kowskica998612009-12-09 23:25:05 +0100313 iv32, key->u.tkip.rx[queue].p1k);
314 key->u.tkip.rx[queue].state = TKIP_STATE_PHASE1_HW_UPLOADED;
Jiri Bencf0706e82007-05-05 11:45:53 -0700315 }
316
Harvey Harrison7c705372008-06-11 14:22:00 -0700317 tkip_mixing_phase2(tk, &key->u.tkip.rx[queue], iv16, rc4key);
Johannes Berg9ae705c2008-06-20 11:54:24 +0200318#ifdef CONFIG_MAC80211_TKIP_DEBUG
Jiri Bencf0706e82007-05-05 11:45:53 -0700319 {
320 int i;
321 printk(KERN_DEBUG "TKIP decrypt: Phase2 rc4key=");
322 for (i = 0; i < 16; i++)
323 printk("%02x ", rc4key[i]);
324 printk("\n");
325 }
Johannes Berg9ae705c2008-06-20 11:54:24 +0200326#endif
Jiri Bencf0706e82007-05-05 11:45:53 -0700327
328 res = ieee80211_wep_decrypt_data(tfm, rc4key, 16, pos, payload_len - 12);
329 done:
330 if (res == TKIP_DECRYPT_OK) {
Johannes Berg50741ae2007-09-26 15:19:45 +0200331 /*
332 * Record previously received IV, will be copied into the
333 * key information after MIC verification. It is possible
334 * that we don't catch replays of fragments but that's ok
335 * because the Michael MIC verication will then fail.
336 */
337 *out_iv32 = iv32;
338 *out_iv16 = iv16;
Jiri Bencf0706e82007-05-05 11:45:53 -0700339 }
340
341 return res;
342}