Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Software WEP encryption implementation |
| 3 | * Copyright 2002, Jouni Malinen <jkmaline@cc.hut.fi> |
| 4 | * Copyright 2003, Instant802 Networks, Inc. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/netdevice.h> |
| 12 | #include <linux/types.h> |
| 13 | #include <linux/random.h> |
| 14 | #include <linux/compiler.h> |
| 15 | #include <linux/crc32.h> |
| 16 | #include <linux/crypto.h> |
| 17 | #include <linux/err.h> |
| 18 | #include <linux/mm.h> |
Ralf Baechle | 1176360 | 2007-10-23 20:42:11 +0200 | [diff] [blame] | 19 | #include <linux/scatterlist.h> |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 20 | |
| 21 | #include <net/mac80211.h> |
| 22 | #include "ieee80211_i.h" |
| 23 | #include "wep.h" |
| 24 | |
| 25 | |
| 26 | int ieee80211_wep_init(struct ieee80211_local *local) |
| 27 | { |
| 28 | /* start WEP IV from a random value */ |
| 29 | get_random_bytes(&local->wep_iv, WEP_IV_LEN); |
| 30 | |
| 31 | local->wep_tx_tfm = crypto_alloc_blkcipher("ecb(arc4)", 0, |
| 32 | CRYPTO_ALG_ASYNC); |
| 33 | if (IS_ERR(local->wep_tx_tfm)) |
Jeremy Fitzhardinge | 023a04b | 2008-07-14 12:52:08 -0700 | [diff] [blame] | 34 | return PTR_ERR(local->wep_tx_tfm); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 35 | |
| 36 | local->wep_rx_tfm = crypto_alloc_blkcipher("ecb(arc4)", 0, |
| 37 | CRYPTO_ALG_ASYNC); |
| 38 | if (IS_ERR(local->wep_rx_tfm)) { |
| 39 | crypto_free_blkcipher(local->wep_tx_tfm); |
Jeremy Fitzhardinge | 023a04b | 2008-07-14 12:52:08 -0700 | [diff] [blame] | 40 | return PTR_ERR(local->wep_rx_tfm); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 41 | } |
| 42 | |
| 43 | return 0; |
| 44 | } |
| 45 | |
| 46 | void ieee80211_wep_free(struct ieee80211_local *local) |
| 47 | { |
| 48 | crypto_free_blkcipher(local->wep_tx_tfm); |
| 49 | crypto_free_blkcipher(local->wep_rx_tfm); |
| 50 | } |
| 51 | |
| 52 | static inline int ieee80211_wep_weak_iv(u32 iv, int keylen) |
| 53 | { |
| 54 | /* Fluhrer, Mantin, and Shamir have reported weaknesses in the |
| 55 | * key scheduling algorithm of RC4. At least IVs (KeyByte + 3, |
| 56 | * 0xff, N) can be used to speedup attacks, so avoid using them. */ |
| 57 | if ((iv & 0xff00) == 0xff00) { |
| 58 | u8 B = (iv >> 16) & 0xff; |
| 59 | if (B >= 3 && B < 3 + keylen) |
| 60 | return 1; |
| 61 | } |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | |
Johannes Berg | 4f0d18e | 2007-09-26 15:19:40 +0200 | [diff] [blame] | 66 | static void ieee80211_wep_get_iv(struct ieee80211_local *local, |
| 67 | struct ieee80211_key *key, u8 *iv) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 68 | { |
| 69 | local->wep_iv++; |
Johannes Berg | 8f20fc2 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 70 | if (ieee80211_wep_weak_iv(local->wep_iv, key->conf.keylen)) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 71 | local->wep_iv += 0x0100; |
| 72 | |
| 73 | if (!iv) |
| 74 | return; |
| 75 | |
| 76 | *iv++ = (local->wep_iv >> 16) & 0xff; |
| 77 | *iv++ = (local->wep_iv >> 8) & 0xff; |
| 78 | *iv++ = local->wep_iv & 0xff; |
Johannes Berg | 8f20fc2 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 79 | *iv++ = key->conf.keyidx << 6; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 80 | } |
| 81 | |
| 82 | |
Johannes Berg | 6a22a59 | 2007-09-26 15:19:41 +0200 | [diff] [blame] | 83 | static u8 *ieee80211_wep_add_iv(struct ieee80211_local *local, |
| 84 | struct sk_buff *skb, |
| 85 | struct ieee80211_key *key) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 86 | { |
Harvey Harrison | 70217d7 | 2008-06-22 16:45:23 -0700 | [diff] [blame] | 87 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 88 | unsigned int hdrlen; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 89 | u8 *newhdr; |
| 90 | |
Harvey Harrison | 70217d7 | 2008-06-22 16:45:23 -0700 | [diff] [blame] | 91 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 92 | |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 93 | if (WARN_ON(skb_tailroom(skb) < WEP_ICV_LEN || |
| 94 | skb_headroom(skb) < WEP_IV_LEN)) |
| 95 | return NULL; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 96 | |
Harvey Harrison | 70217d7 | 2008-06-22 16:45:23 -0700 | [diff] [blame] | 97 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 98 | newhdr = skb_push(skb, WEP_IV_LEN); |
| 99 | memmove(newhdr, newhdr + WEP_IV_LEN, hdrlen); |
| 100 | ieee80211_wep_get_iv(local, key, newhdr + hdrlen); |
| 101 | return newhdr + hdrlen; |
| 102 | } |
| 103 | |
| 104 | |
Johannes Berg | 4f0d18e | 2007-09-26 15:19:40 +0200 | [diff] [blame] | 105 | static void ieee80211_wep_remove_iv(struct ieee80211_local *local, |
| 106 | struct sk_buff *skb, |
| 107 | struct ieee80211_key *key) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 108 | { |
Harvey Harrison | 70217d7 | 2008-06-22 16:45:23 -0700 | [diff] [blame] | 109 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 110 | unsigned int hdrlen; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 111 | |
Harvey Harrison | 70217d7 | 2008-06-22 16:45:23 -0700 | [diff] [blame] | 112 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 113 | memmove(skb->data + WEP_IV_LEN, skb->data, hdrlen); |
| 114 | skb_pull(skb, WEP_IV_LEN); |
| 115 | } |
| 116 | |
| 117 | |
| 118 | /* Perform WEP encryption using given key. data buffer must have tailroom |
| 119 | * for 4-byte ICV. data_len must not include this ICV. Note: this function |
| 120 | * does _not_ add IV. data = RC4(data | CRC32(data)) */ |
| 121 | void ieee80211_wep_encrypt_data(struct crypto_blkcipher *tfm, u8 *rc4key, |
| 122 | size_t klen, u8 *data, size_t data_len) |
| 123 | { |
| 124 | struct blkcipher_desc desc = { .tfm = tfm }; |
| 125 | struct scatterlist sg; |
| 126 | __le32 *icv; |
| 127 | |
| 128 | icv = (__le32 *)(data + data_len); |
| 129 | *icv = cpu_to_le32(~crc32_le(~0, data, data_len)); |
| 130 | |
| 131 | crypto_blkcipher_setkey(tfm, rc4key, klen); |
Jens Axboe | fa05f12 | 2007-10-22 19:44:26 +0200 | [diff] [blame] | 132 | sg_init_one(&sg, data, data_len + WEP_ICV_LEN); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 133 | crypto_blkcipher_encrypt(&desc, &sg, &sg, sg.length); |
| 134 | } |
| 135 | |
| 136 | |
| 137 | /* Perform WEP encryption on given skb. 4 bytes of extra space (IV) in the |
| 138 | * beginning of the buffer 4 bytes of extra space (ICV) in the end of the |
| 139 | * buffer will be added. Both IV and ICV will be transmitted, so the |
| 140 | * payload length increases with 8 bytes. |
| 141 | * |
| 142 | * WEP frame payload: IV + TX key idx, RC4(data), ICV = RC4(CRC32(data)) |
| 143 | */ |
| 144 | int ieee80211_wep_encrypt(struct ieee80211_local *local, struct sk_buff *skb, |
| 145 | struct ieee80211_key *key) |
| 146 | { |
| 147 | u32 klen; |
| 148 | u8 *rc4key, *iv; |
| 149 | size_t len; |
| 150 | |
Johannes Berg | 8f20fc2 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 151 | if (!key || key->conf.alg != ALG_WEP) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 152 | return -1; |
| 153 | |
Johannes Berg | 8f20fc2 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 154 | klen = 3 + key->conf.keylen; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 155 | rc4key = kmalloc(klen, GFP_ATOMIC); |
| 156 | if (!rc4key) |
| 157 | return -1; |
| 158 | |
| 159 | iv = ieee80211_wep_add_iv(local, skb, key); |
| 160 | if (!iv) { |
| 161 | kfree(rc4key); |
| 162 | return -1; |
| 163 | } |
| 164 | |
| 165 | len = skb->len - (iv + WEP_IV_LEN - skb->data); |
| 166 | |
| 167 | /* Prepend 24-bit IV to RC4 key */ |
| 168 | memcpy(rc4key, iv, 3); |
| 169 | |
| 170 | /* Copy rest of the WEP key (the secret part) */ |
Johannes Berg | 8f20fc2 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 171 | memcpy(rc4key + 3, key->conf.key, key->conf.keylen); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 172 | |
| 173 | /* Add room for ICV */ |
| 174 | skb_put(skb, WEP_ICV_LEN); |
| 175 | |
| 176 | ieee80211_wep_encrypt_data(local->wep_tx_tfm, rc4key, klen, |
| 177 | iv + WEP_IV_LEN, len); |
| 178 | |
| 179 | kfree(rc4key); |
| 180 | |
| 181 | return 0; |
| 182 | } |
| 183 | |
| 184 | |
| 185 | /* Perform WEP decryption using given key. data buffer includes encrypted |
| 186 | * payload, including 4-byte ICV, but _not_ IV. data_len must not include ICV. |
| 187 | * Return 0 on success and -1 on ICV mismatch. */ |
| 188 | int ieee80211_wep_decrypt_data(struct crypto_blkcipher *tfm, u8 *rc4key, |
| 189 | size_t klen, u8 *data, size_t data_len) |
| 190 | { |
| 191 | struct blkcipher_desc desc = { .tfm = tfm }; |
| 192 | struct scatterlist sg; |
| 193 | __le32 crc; |
| 194 | |
| 195 | crypto_blkcipher_setkey(tfm, rc4key, klen); |
Jens Axboe | fa05f12 | 2007-10-22 19:44:26 +0200 | [diff] [blame] | 196 | sg_init_one(&sg, data, data_len + WEP_ICV_LEN); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 197 | crypto_blkcipher_decrypt(&desc, &sg, &sg, sg.length); |
| 198 | |
| 199 | crc = cpu_to_le32(~crc32_le(~0, data, data_len)); |
| 200 | if (memcmp(&crc, data + data_len, WEP_ICV_LEN) != 0) |
| 201 | /* ICV mismatch */ |
| 202 | return -1; |
| 203 | |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | |
| 208 | /* Perform WEP decryption on given skb. Buffer includes whole WEP part of |
| 209 | * the frame: IV (4 bytes), encrypted payload (including SNAP header), |
| 210 | * ICV (4 bytes). skb->len includes both IV and ICV. |
| 211 | * |
| 212 | * Returns 0 if frame was decrypted successfully and ICV was correct and -1 on |
| 213 | * failure. If frame is OK, IV and ICV will be removed, i.e., decrypted payload |
| 214 | * is moved to the beginning of the skb and skb length will be reduced. |
| 215 | */ |
| 216 | int ieee80211_wep_decrypt(struct ieee80211_local *local, struct sk_buff *skb, |
| 217 | struct ieee80211_key *key) |
| 218 | { |
| 219 | u32 klen; |
| 220 | u8 *rc4key; |
| 221 | u8 keyidx; |
Harvey Harrison | 70217d7 | 2008-06-22 16:45:23 -0700 | [diff] [blame] | 222 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 223 | unsigned int hdrlen; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 224 | size_t len; |
| 225 | int ret = 0; |
| 226 | |
Harvey Harrison | 70217d7 | 2008-06-22 16:45:23 -0700 | [diff] [blame] | 227 | if (!ieee80211_has_protected(hdr->frame_control)) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 228 | return -1; |
| 229 | |
Harvey Harrison | 70217d7 | 2008-06-22 16:45:23 -0700 | [diff] [blame] | 230 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
Harvey Harrison | d298487 | 2008-07-15 18:44:10 -0700 | [diff] [blame] | 231 | if (skb->len < hdrlen + WEP_IV_LEN + WEP_ICV_LEN) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 232 | return -1; |
| 233 | |
Harvey Harrison | d298487 | 2008-07-15 18:44:10 -0700 | [diff] [blame] | 234 | len = skb->len - hdrlen - WEP_IV_LEN - WEP_ICV_LEN; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 235 | |
| 236 | keyidx = skb->data[hdrlen + 3] >> 6; |
| 237 | |
Johannes Berg | 8f20fc2 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 238 | if (!key || keyidx != key->conf.keyidx || key->conf.alg != ALG_WEP) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 239 | return -1; |
| 240 | |
Johannes Berg | 8f20fc2 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 241 | klen = 3 + key->conf.keylen; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 242 | |
| 243 | rc4key = kmalloc(klen, GFP_ATOMIC); |
| 244 | if (!rc4key) |
| 245 | return -1; |
| 246 | |
| 247 | /* Prepend 24-bit IV to RC4 key */ |
| 248 | memcpy(rc4key, skb->data + hdrlen, 3); |
| 249 | |
| 250 | /* Copy rest of the WEP key (the secret part) */ |
Johannes Berg | 8f20fc2 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 251 | memcpy(rc4key + 3, key->conf.key, key->conf.keylen); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 252 | |
| 253 | if (ieee80211_wep_decrypt_data(local->wep_rx_tfm, rc4key, klen, |
| 254 | skb->data + hdrlen + WEP_IV_LEN, |
Johannes Berg | f4ea83d | 2008-06-30 15:10:46 +0200 | [diff] [blame] | 255 | len)) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 256 | ret = -1; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 257 | |
| 258 | kfree(rc4key); |
| 259 | |
| 260 | /* Trim ICV */ |
| 261 | skb_trim(skb, skb->len - WEP_ICV_LEN); |
| 262 | |
| 263 | /* Remove IV */ |
| 264 | memmove(skb->data + WEP_IV_LEN, skb->data, hdrlen); |
| 265 | skb_pull(skb, WEP_IV_LEN); |
| 266 | |
| 267 | return ret; |
| 268 | } |
| 269 | |
| 270 | |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 271 | u8 * ieee80211_wep_is_weak_iv(struct sk_buff *skb, struct ieee80211_key *key) |
| 272 | { |
Harvey Harrison | 70217d7 | 2008-06-22 16:45:23 -0700 | [diff] [blame] | 273 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 274 | unsigned int hdrlen; |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 275 | u8 *ivpos; |
| 276 | u32 iv; |
| 277 | |
Harvey Harrison | 70217d7 | 2008-06-22 16:45:23 -0700 | [diff] [blame] | 278 | if (!ieee80211_has_protected(hdr->frame_control)) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 279 | return NULL; |
| 280 | |
Harvey Harrison | 70217d7 | 2008-06-22 16:45:23 -0700 | [diff] [blame] | 281 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 282 | ivpos = skb->data + hdrlen; |
| 283 | iv = (ivpos[0] << 16) | (ivpos[1] << 8) | ivpos[2]; |
| 284 | |
Johannes Berg | 8f20fc2 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 285 | if (ieee80211_wep_weak_iv(iv, key->conf.keylen)) |
Jiri Benc | f0706e82 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 286 | return ivpos; |
| 287 | |
| 288 | return NULL; |
| 289 | } |
Johannes Berg | 4f0d18e | 2007-09-26 15:19:40 +0200 | [diff] [blame] | 290 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 291 | ieee80211_rx_result |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 292 | ieee80211_crypto_wep_decrypt(struct ieee80211_rx_data *rx) |
Johannes Berg | 4f0d18e | 2007-09-26 15:19:40 +0200 | [diff] [blame] | 293 | { |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 294 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
| 295 | |
| 296 | if (!ieee80211_is_data(hdr->frame_control) && |
| 297 | !ieee80211_is_auth(hdr->frame_control)) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 298 | return RX_CONTINUE; |
Johannes Berg | 4f0d18e | 2007-09-26 15:19:40 +0200 | [diff] [blame] | 299 | |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 300 | if (!(rx->status->flag & RX_FLAG_DECRYPTED)) { |
Johannes Berg | f4ea83d | 2008-06-30 15:10:46 +0200 | [diff] [blame] | 301 | if (ieee80211_wep_decrypt(rx->local, rx->skb, rx->key)) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 302 | return RX_DROP_UNUSABLE; |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 303 | } else if (!(rx->status->flag & RX_FLAG_IV_STRIPPED)) { |
Johannes Berg | 4f0d18e | 2007-09-26 15:19:40 +0200 | [diff] [blame] | 304 | ieee80211_wep_remove_iv(rx->local, rx->skb, rx->key); |
| 305 | /* remove ICV */ |
Harvey Harrison | d298487 | 2008-07-15 18:44:10 -0700 | [diff] [blame] | 306 | skb_trim(rx->skb, rx->skb->len - WEP_ICV_LEN); |
Johannes Berg | 4f0d18e | 2007-09-26 15:19:40 +0200 | [diff] [blame] | 307 | } |
| 308 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 309 | return RX_CONTINUE; |
Johannes Berg | 4f0d18e | 2007-09-26 15:19:40 +0200 | [diff] [blame] | 310 | } |
Johannes Berg | 6a22a59 | 2007-09-26 15:19:41 +0200 | [diff] [blame] | 311 | |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 312 | static int wep_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb) |
Johannes Berg | 6a22a59 | 2007-09-26 15:19:41 +0200 | [diff] [blame] | 313 | { |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 314 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 315 | |
Johannes Berg | 6a22a59 | 2007-09-26 15:19:41 +0200 | [diff] [blame] | 316 | if (!(tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) { |
| 317 | if (ieee80211_wep_encrypt(tx->local, skb, tx->key)) |
| 318 | return -1; |
| 319 | } else { |
Pavel Roskin | 2b21214 | 2008-06-02 07:54:50 -0400 | [diff] [blame] | 320 | info->control.hw_key = &tx->key->conf; |
Johannes Berg | 6a22a59 | 2007-09-26 15:19:41 +0200 | [diff] [blame] | 321 | if (tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV) { |
| 322 | if (!ieee80211_wep_add_iv(tx->local, skb, tx->key)) |
| 323 | return -1; |
| 324 | } |
| 325 | } |
| 326 | return 0; |
| 327 | } |
| 328 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 329 | ieee80211_tx_result |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 330 | ieee80211_crypto_wep_encrypt(struct ieee80211_tx_data *tx) |
Johannes Berg | 6a22a59 | 2007-09-26 15:19:41 +0200 | [diff] [blame] | 331 | { |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 332 | ieee80211_tx_set_protected(tx); |
Johannes Berg | 6a22a59 | 2007-09-26 15:19:41 +0200 | [diff] [blame] | 333 | |
| 334 | if (wep_encrypt_skb(tx, tx->skb) < 0) { |
| 335 | I802_DEBUG_INC(tx->local->tx_handlers_drop_wep); |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 336 | return TX_DROP; |
Johannes Berg | 6a22a59 | 2007-09-26 15:19:41 +0200 | [diff] [blame] | 337 | } |
| 338 | |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 339 | if (tx->extra_frag) { |
Johannes Berg | 6a22a59 | 2007-09-26 15:19:41 +0200 | [diff] [blame] | 340 | int i; |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 341 | for (i = 0; i < tx->num_extra_frag; i++) { |
| 342 | if (wep_encrypt_skb(tx, tx->extra_frag[i]) < 0) { |
Johannes Berg | 6a22a59 | 2007-09-26 15:19:41 +0200 | [diff] [blame] | 343 | I802_DEBUG_INC(tx->local-> |
| 344 | tx_handlers_drop_wep); |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 345 | return TX_DROP; |
Johannes Berg | 6a22a59 | 2007-09-26 15:19:41 +0200 | [diff] [blame] | 346 | } |
| 347 | } |
| 348 | } |
| 349 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 350 | return TX_CONTINUE; |
Johannes Berg | 6a22a59 | 2007-09-26 15:19:41 +0200 | [diff] [blame] | 351 | } |