summary refs log tree commit diff
path: root/drivers/net/wireless/rt2x00/rt2x00crypto.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/wireless/rt2x00/rt2x00crypto.c')
-rw-r--r--drivers/net/wireless/rt2x00/rt2x00crypto.c256
1 files changed, 0 insertions, 256 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2x00crypto.c b/drivers/net/wireless/rt2x00/rt2x00crypto.c
deleted file mode 100644
index a2fd05ba25ca..000000000000
--- a/drivers/net/wireless/rt2x00/rt2x00crypto.c
+++ /dev/null
@@ -1,256 +0,0 @@
-/*
-	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
-	<http://rt2x00.serialmonkey.com>
-
-	This program is free software; you can redistribute it and/or modify
-	it under the terms of the GNU General Public License as published by
-	the Free Software Foundation; either version 2 of the License, or
-	(at your option) any later version.
-
-	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.
-
-	You should have received a copy of the GNU General Public License
-	along with this program; if not, see <http://www.gnu.org/licenses/>.
- */
-
-/*
-	Module: rt2x00lib
-	Abstract: rt2x00 crypto specific routines.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-
-#include "rt2x00.h"
-#include "rt2x00lib.h"
-
-enum cipher rt2x00crypto_key_to_cipher(struct ieee80211_key_conf *key)
-{
-	switch (key->cipher) {
-	case WLAN_CIPHER_SUITE_WEP40:
-		return CIPHER_WEP64;
-	case WLAN_CIPHER_SUITE_WEP104:
-		return CIPHER_WEP128;
-	case WLAN_CIPHER_SUITE_TKIP:
-		return CIPHER_TKIP;
-	case WLAN_CIPHER_SUITE_CCMP:
-		return CIPHER_AES;
-	default:
-		return CIPHER_NONE;
-	}
-}
-
-void rt2x00crypto_create_tx_descriptor(struct rt2x00_dev *rt2x00dev,
-				       struct sk_buff *skb,
-				       struct txentry_desc *txdesc)
-{
-	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
-	struct ieee80211_key_conf *hw_key = tx_info->control.hw_key;
-
-	if (!rt2x00_has_cap_hw_crypto(rt2x00dev) || !hw_key)
-		return;
-
-	__set_bit(ENTRY_TXD_ENCRYPT, &txdesc->flags);
-
-	txdesc->cipher = rt2x00crypto_key_to_cipher(hw_key);
-
-	if (hw_key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
-		__set_bit(ENTRY_TXD_ENCRYPT_PAIRWISE, &txdesc->flags);
-
-	txdesc->key_idx = hw_key->hw_key_idx;
-	txdesc->iv_offset = txdesc->header_length;
-	txdesc->iv_len = hw_key->iv_len;
-
-	if (!(hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV))
-		__set_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc->flags);
-
-	if (!(hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_MMIC))
-		__set_bit(ENTRY_TXD_ENCRYPT_MMIC, &txdesc->flags);
-}
-
-unsigned int rt2x00crypto_tx_overhead(struct rt2x00_dev *rt2x00dev,
-				      struct sk_buff *skb)
-{
-	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
-	struct ieee80211_key_conf *key = tx_info->control.hw_key;
-	unsigned int overhead = 0;
-
-	if (!rt2x00_has_cap_hw_crypto(rt2x00dev) || !key)
-		return overhead;
-
-	/*
-	 * Extend frame length to include IV/EIV/ICV/MMIC,
-	 * note that these lengths should only be added when
-	 * mac80211 does not generate it.
-	 */
-	overhead += key->icv_len;
-
-	if (!(key->flags & IEEE80211_KEY_FLAG_GENERATE_IV))
-		overhead += key->iv_len;
-
-	if (!(key->flags & IEEE80211_KEY_FLAG_GENERATE_MMIC)) {
-		if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
-			overhead += 8;
-	}
-
-	return overhead;
-}
-
-void rt2x00crypto_tx_copy_iv(struct sk_buff *skb, struct txentry_desc *txdesc)
-{
-	struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
-
-	if (unlikely(!txdesc->iv_len))
-		return;
-
-	/* Copy IV/EIV data */
-	memcpy(skbdesc->iv, skb->data + txdesc->iv_offset, txdesc->iv_len);
-}
-
-void rt2x00crypto_tx_remove_iv(struct sk_buff *skb, struct txentry_desc *txdesc)
-{
-	struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
-
-	if (unlikely(!txdesc->iv_len))
-		return;
-
-	/* Copy IV/EIV data */
-	memcpy(skbdesc->iv, skb->data + txdesc->iv_offset, txdesc->iv_len);
-
-	/* Move ieee80211 header */
-	memmove(skb->data + txdesc->iv_len, skb->data, txdesc->iv_offset);
-
-	/* Pull buffer to correct size */
-	skb_pull(skb, txdesc->iv_len);
-	txdesc->length -= txdesc->iv_len;
-
-	/* IV/EIV data has officially been stripped */
-	skbdesc->flags |= SKBDESC_IV_STRIPPED;
-}
-
-void rt2x00crypto_tx_insert_iv(struct sk_buff *skb, unsigned int header_length)
-{
-	struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
-	const unsigned int iv_len =
-	    ((!!(skbdesc->iv[0])) * 4) + ((!!(skbdesc->iv[1])) * 4);
-
-	if (!(skbdesc->flags & SKBDESC_IV_STRIPPED))
-		return;
-
-	skb_push(skb, iv_len);
-
-	/* Move ieee80211 header */
-	memmove(skb->data, skb->data + iv_len, header_length);
-
-	/* Copy IV/EIV data */
-	memcpy(skb->data + header_length, skbdesc->iv, iv_len);
-
-	/* IV/EIV data has returned into the frame */
-	skbdesc->flags &= ~SKBDESC_IV_STRIPPED;
-}
-
-void rt2x00crypto_rx_insert_iv(struct sk_buff *skb,
-			       unsigned int header_length,
-			       struct rxdone_entry_desc *rxdesc)
-{
-	unsigned int payload_len = rxdesc->size - header_length;
-	unsigned int align = ALIGN_SIZE(skb, header_length);
-	unsigned int iv_len;
-	unsigned int icv_len;
-	unsigned int transfer = 0;
-
-	/*
-	 * WEP64/WEP128: Provides IV & ICV
-	 * TKIP: Provides IV/EIV & ICV
-	 * AES: Provies IV/EIV & ICV
-	 */
-	switch (rxdesc->cipher) {
-	case CIPHER_WEP64:
-	case CIPHER_WEP128:
-		iv_len = 4;
-		icv_len = 4;
-		break;
-	case CIPHER_TKIP:
-		iv_len = 8;
-		icv_len = 4;
-		break;
-	case CIPHER_AES:
-		iv_len = 8;
-		icv_len = 8;
-		break;
-	default:
-		/* Unsupport type */
-		return;
-	}
-
-	/*
-	 * Make room for new data. There are 2 possibilities
-	 * either the alignment is already present between
-	 * the 802.11 header and payload. In that case we
-	 * we have to move the header less then the iv_len
-	 * since we can use the already available l2pad bytes
-	 * for the iv data.
-	 * When the alignment must be added manually we must
-	 * move the header more then iv_len since we must
-	 * make room for the payload move as well.
-	 */
-	if (rxdesc->dev_flags & RXDONE_L2PAD) {
-		skb_push(skb, iv_len - align);
-		skb_put(skb, icv_len);
-
-		/* Move ieee80211 header */
-		memmove(skb->data + transfer,
-			skb->data + transfer + (iv_len - align),
-			header_length);
-		transfer += header_length;
-	} else {
-		skb_push(skb, iv_len + align);
-		if (align < icv_len)
-			skb_put(skb, icv_len - align);
-		else if (align > icv_len)
-			skb_trim(skb, rxdesc->size + iv_len + icv_len);
-
-		/* Move ieee80211 header */
-		memmove(skb->data + transfer,
-			skb->data + transfer + iv_len + align,
-			header_length);
-		transfer += header_length;
-	}
-
-	/* Copy IV/EIV data */
-	memcpy(skb->data + transfer, rxdesc->iv, iv_len);
-	transfer += iv_len;
-
-	/*
-	 * Move payload for alignment purposes. Note that
-	 * this is only needed when no l2 padding is present.
-	 */
-	if (!(rxdesc->dev_flags & RXDONE_L2PAD)) {
-		memmove(skb->data + transfer,
-			skb->data + transfer + align,
-			payload_len);
-	}
-
-	/*
-	 * NOTE: Always count the payload as transferred,
-	 * even when alignment was set to zero. This is required
-	 * for determining the correct offset for the ICV data.
-	 */
-	transfer += payload_len;
-
-	/*
-	 * Copy ICV data
-	 * AES appends 8 bytes, we can't fill the upper
-	 * 4 bytes, but mac80211 doesn't care about what
-	 * we provide here anyway and strips it immediately.
-	 */
-	memcpy(skb->data + transfer, &rxdesc->icv, 4);
-	transfer += icv_len;
-
-	/* IV/EIV/ICV has been inserted into frame */
-	rxdesc->size = transfer;
-	rxdesc->flags &= ~RX_FLAG_IV_STRIPPED;
-}
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-09-25 08:44:48 +0000