/*
 * Michael MIC implementation - optimized for TKIP MIC operations
 * Copyright 2002-2003, Instant802 Networks, Inc.
 *
 * 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.
 */
#include <linux/types.h>
#include <linux/bitops.h>
#include <linux/ieee80211.h>
#include <asm/unaligned.h>

#include "michael.h"

static void michael_block(struct michael_mic_ctx *mctx, u32 val)
{
	mctx->l ^= val;
	mctx->r ^= rol32(mctx->l, 17);
	mctx->l += mctx->r;
	mctx->r ^= ((mctx->l & 0xff00ff00) >> 8) |
		   ((mctx->l & 0x00ff00ff) << 8);
	mctx->l += mctx->r;
	mctx->r ^= rol32(mctx->l, 3);
	mctx->l += mctx->r;
	mctx->r ^= ror32(mctx->l, 2);
	mctx->l += mctx->r;
}

static void michael_mic_hdr(struct michael_mic_ctx *mctx, const u8 *key,
			    struct ieee80211_hdr *hdr)
{
	u8 *da, *sa, tid;

	da = ieee80211_get_DA(hdr);
	sa = ieee80211_get_SA(hdr);
	if (ieee80211_is_data_qos(hdr->frame_control))
		tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
	else
		tid = 0;

	mctx->l = get_unaligned_le32(key);
	mctx->r = get_unaligned_le32(key + 4);

	/*
	 * A pseudo header (DA, SA, Priority, 0, 0, 0) is used in Michael MIC
	 * calculation, but it is _not_ transmitted
	 */
	michael_block(mctx, get_unaligned_le32(da));
	michael_block(mctx, get_unaligned_le16(&da[4]) |
			    (get_unaligned_le16(sa) << 16));
	michael_block(mctx, get_unaligned_le32(&sa[2]));
	michael_block(mctx, tid);
}

void michael_mic(const u8 *key, struct ieee80211_hdr *hdr,
		 const u8 *data, size_t data_len, u8 *mic)
{
	u32 val;
	size_t block, blocks, left;
	struct michael_mic_ctx mctx;

	michael_mic_hdr(&mctx, key, hdr);

	/* Real data */
	blocks = data_len / 4;
	left = data_len % 4;

	for (block = 0; block < blocks; block++)
		michael_block(&mctx, get_unaligned_le32(&data[block * 4]));

	/* Partial block of 0..3 bytes and padding: 0x5a + 4..7 zeros to make
	 * total length a multiple of 4. */
	val = 0x5a;
	while (left > 0) {
		val <<= 8;
		left--;
		val |= data[blocks * 4 + left];
	}

	michael_block(&mctx, val);
	michael_block(&mctx, 0);

	put_unaligned_le32(mctx.l, mic);
	put_unaligned_le32(mctx.r, mic + 4);
}
og/include/uapi/drm/vgem_drm.h'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=24d615a694d649aa2e167c3f97f62bdad07e3f84'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=24d615a694d649aa2e167c3f97f62bdad07e3f84'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/uapi?id=24d615a694d649aa2e167c3f97f62bdad07e3f84'>uapi</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/uapi/drm?id=24d615a694d649aa2e167c3f97f62bdad07e3f84'>drm</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/uapi/drm/vgem_drm.h?id=24d615a694d649aa2e167c3f97f62bdad07e3f84'>vgem_drm.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='24d615a694d649aa2e167c3f97f62bdad07e3f84'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Aleksander Morgado &lt;aleksander@aleksander.es&gt;</td><td class='right'>2017-01-18 21:31:31 +0100</td></tr>
<tr><th>committer</th><td>Johan Hovold &lt;johan@kernel.org&gt;</td><td class='right'>2017-01-19 09:08:37 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/uapi/drm/vgem_drm.h?id=24d615a694d649aa2e167c3f97f62bdad07e3f84'>24d615a694d649aa2e167c3f97f62bdad07e3f84</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/uapi/drm/vgem_drm.h?id=24d615a694d649aa2e167c3f97f62bdad07e3f84'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=24d615a694d649aa2e167c3f97f62bdad07e3f84'>2fe33c115bdec6bf4b01e27afd90bb16fa668e22</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/uapi/drm/vgem_drm.h?id=24d615a694d649aa2e167c3f97f62bdad07e3f84'>include/uapi/drm/vgem_drm.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/uapi/drm/vgem_drm.h?id=49def1853334396f948dcb4cedb9347abb318df5'>49def1853334396f948dcb4cedb9347abb318df5</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/uapi/drm/vgem_drm.h?id=24d615a694d649aa2e167c3f97f62bdad07e3f84&amp;id2=49def1853334396f948dcb4cedb9347abb318df5'>diff</a>)</td></tr></table>
<div class='commit-subject'>USB: serial: qcserial: add Dell DW5570 QDL</div><div class='commit-msg'>The Dell DW5570 is a re-branded Sierra Wireless MC8805 which will by
default boot with vid 0x413c and pid 0x81a3. When triggered QDL download
mode, the device switches to pid 0x81a6 and provides the standard TTY
used for firmware upgrade.

Cc: &lt;stable@vger.kernel.org&gt;
Signed-off-by: Aleksander Morgado &lt;aleksander@aleksander.es&gt;
Signed-off-by: Johan Hovold &lt;johan@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=24d615a694d649aa2e167c3f97f62bdad07e3f84'>Diffstat</a> (limited to 'include/uapi/drm/vgem_drm.h')</div><table summary='diffstat' class='diffstat'>