diff options
Diffstat (limited to 'drivers/staging/rtl8188eu/core/rtw_security.c')
| -rw-r--r-- | drivers/staging/rtl8188eu/core/rtw_security.c | 92 |
1 files changed, 47 insertions, 45 deletions
diff --git a/drivers/staging/rtl8188eu/core/rtw_security.c b/drivers/staging/rtl8188eu/core/rtw_security.c index 67a2490f055e..2a48b09ea9ae 100644 --- a/drivers/staging/rtl8188eu/core/rtw_security.c +++ b/drivers/staging/rtl8188eu/core/rtw_security.c @@ -1,16 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0 /****************************************************************************** * * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved. * - * This program is free software; you can redistribute it and/or modify it - * under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * ******************************************************************************/ #define _RTW_SECURITY_C_ @@ -139,61 +131,72 @@ static __le32 getcrc32(u8 *buf, int len) Need to consider the fragment situation */ void rtw_wep_encrypt(struct adapter *padapter, u8 *pxmitframe) -{ /* exclude ICV */ - - unsigned char crc[4]; - struct arc4context mycontext; - +{ int curfragnum, length; - u32 keylength; - - u8 *pframe, *payload, *iv; /* wepkey */ - u8 wepkey[16]; - u8 hw_hdr_offset = 0; + u8 *pframe; + u8 hw_hdr_offset = 0; struct pkt_attrib *pattrib = &((struct xmit_frame *)pxmitframe)->attrib; struct security_priv *psecuritypriv = &padapter->securitypriv; struct xmit_priv *pxmitpriv = &padapter->xmitpriv; - + const int keyindex = psecuritypriv->dot11PrivacyKeyIndex; + void *crypto_private; + struct sk_buff *skb; + struct lib80211_crypto_ops *crypto_ops; if (((struct xmit_frame *)pxmitframe)->buf_addr == NULL) return; + if ((pattrib->encrypt != _WEP40_) && (pattrib->encrypt != _WEP104_)) + return; + hw_hdr_offset = TXDESC_SIZE + (((struct xmit_frame *)pxmitframe)->pkt_offset * PACKET_OFFSET_SZ); pframe = ((struct xmit_frame *)pxmitframe)->buf_addr + hw_hdr_offset; - /* start to encrypt each fragment */ - if ((pattrib->encrypt == _WEP40_) || (pattrib->encrypt == _WEP104_)) { - keylength = psecuritypriv->dot11DefKeylen[psecuritypriv->dot11PrivacyKeyIndex]; + crypto_ops = try_then_request_module(lib80211_get_crypto_ops("WEP"), "lib80211_crypt_wep"); - for (curfragnum = 0; curfragnum < pattrib->nr_frags; curfragnum++) { - iv = pframe+pattrib->hdrlen; - memcpy(&wepkey[0], iv, 3); - memcpy(&wepkey[3], &psecuritypriv->dot11DefKey[psecuritypriv->dot11PrivacyKeyIndex].skey[0], keylength); - payload = pframe+pattrib->iv_len+pattrib->hdrlen; + if (!crypto_ops) + return; - if ((curfragnum+1) == pattrib->nr_frags) { /* the last fragment */ - length = pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len; + crypto_private = crypto_ops->init(keyindex); + if (!crypto_private) + return; - *((__le32 *)crc) = getcrc32(payload, length); + if (crypto_ops->set_key(psecuritypriv->dot11DefKey[keyindex].skey, + psecuritypriv->dot11DefKeylen[keyindex], NULL, crypto_private) < 0) + goto free_crypto_private; - arcfour_init(&mycontext, wepkey, 3+keylength); - arcfour_encrypt(&mycontext, payload, payload, length); - arcfour_encrypt(&mycontext, payload+length, crc, 4); - } else { - length = pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len; - *((__le32 *)crc) = getcrc32(payload, length); - arcfour_init(&mycontext, wepkey, 3+keylength); - arcfour_encrypt(&mycontext, payload, payload, length); - arcfour_encrypt(&mycontext, payload+length, crc, 4); - - pframe += pxmitpriv->frag_len; - pframe = (u8 *)round_up((size_t)(pframe), 4); - } + for (curfragnum = 0; curfragnum < pattrib->nr_frags; curfragnum++) { + if (curfragnum + 1 == pattrib->nr_frags) + length = pattrib->last_txcmdsz; + else + length = pxmitpriv->frag_len; + skb = dev_alloc_skb(length); + if (!skb) + goto free_crypto_private; + + skb_put_data(skb, pframe, length); + + memmove(skb->data + 4, skb->data, pattrib->hdrlen); + skb_pull(skb, 4); + skb_trim(skb, skb->len - 4); + + if (crypto_ops->encrypt_mpdu(skb, pattrib->hdrlen, crypto_private)) { + kfree_skb(skb); + goto free_crypto_private; } + + memcpy(pframe, skb->data, skb->len); + + pframe += skb->len; + pframe = (u8 *)round_up((size_t)(pframe), 4); + + kfree_skb(skb); } +free_crypto_private: + crypto_ops->deinit(crypto_private); } int rtw_wep_decrypt(struct adapter *padapter, u8 *precvframe) @@ -1038,7 +1041,6 @@ static void construct_mic_header2(u8 *mic_header2, u8 *mpdu, int a4_exists, int mic_header2[14] = mpdu[30] & 0x0f; mic_header2[15] = mpdu[31] & 0x00; } - } /************************************************/ |