/*
 * AES-128-CMAC with TLen 16 for IEEE 802.11w BIP
 * Copyright 2008, Jouni Malinen <j@w1.fi>
 *
 * 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/kernel.h>
#include <linux/types.h>
#include <linux/crypto.h>
#include <linux/export.h>
#include <linux/err.h>
#include <crypto/aes.h>

#include <net/mac80211.h>
#include "key.h"
#include "aes_cmac.h"

#define CMAC_TLEN 8 /* CMAC TLen = 64 bits (8 octets) */
#define CMAC_TLEN_256 16 /* CMAC TLen = 128 bits (16 octets) */
#define AAD_LEN 20

static const u8 zero[CMAC_TLEN_256];

void ieee80211_aes_cmac(struct crypto_shash *tfm, const u8 *aad,
			const u8 *data, size_t data_len, u8 *mic)
{
	SHASH_DESC_ON_STACK(desc, tfm);
	u8 out[AES_BLOCK_SIZE];

	desc->tfm = tfm;

	crypto_shash_init(desc);
	crypto_shash_update(desc, aad, AAD_LEN);
	crypto_shash_update(desc, data, data_len - CMAC_TLEN);
	crypto_shash_finup(desc, zero, CMAC_TLEN, out);

	memcpy(mic, out, CMAC_TLEN);
}

void ieee80211_aes_cmac_256(struct crypto_shash *tfm, const u8 *aad,
			    const u8 *data, size_t data_len, u8 *mic)
{
	SHASH_DESC_ON_STACK(desc, tfm);

	desc->tfm = tfm;

	crypto_shash_init(desc);
	crypto_shash_update(desc, aad, AAD_LEN);
	crypto_shash_update(desc, data, data_len - CMAC_TLEN_256);
	crypto_shash_finup(desc, zero, CMAC_TLEN_256, mic);
}

struct crypto_shash *ieee80211_aes_cmac_key_setup(const u8 key[],
						  size_t key_len)
{
	struct crypto_shash *tfm;

	tfm = crypto_alloc_shash("cmac(aes)", 0, 0);
	if (!IS_ERR(tfm))
		crypto_shash_setkey(tfm, key, key_len);

	return tfm;
}

void ieee80211_aes_cmac_key_free(struct crypto_shash *tfm)
{
	crypto_free_shash(tfm);
}
e5'>refs</a><a href='/cgit.cgi/linux/net-next.git/log/net/rds/Makefile?h=nds-private-remove'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/net/rds/Makefile?h=nds-private-remove&amp;id=99421c1cb27fb837e93b517036fab4500fe39de5'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/net/rds/Makefile?h=nds-private-remove&amp;id=99421c1cb27fb837e93b517036fab4500fe39de5'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/net/rds/Makefile?h=nds-private-remove&amp;id=99421c1cb27fb837e93b517036fab4500fe39de5'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/net/rds/Makefile'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=99421c1cb27fb837e93b517036fab4500fe39de5'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net?h=nds-private-remove&amp;id=99421c1cb27fb837e93b517036fab4500fe39de5'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/rds?h=nds-private-remove&amp;id=99421c1cb27fb837e93b517036fab4500fe39de5'>rds</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/rds/Makefile?h=nds-private-remove&amp;id=99421c1cb27fb837e93b517036fab4500fe39de5'>Makefile</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='99421c1cb27fb837e93b517036fab4500fe39de5'/><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>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-15 16:09:50 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-15 16:09:50 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/rds/Makefile?h=nds-private-remove&amp;id=99421c1cb27fb837e93b517036fab4500fe39de5'>99421c1cb27fb837e93b517036fab4500fe39de5</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/rds/Makefile?id=99421c1cb27fb837e93b517036fab4500fe39de5'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=99421c1cb27fb837e93b517036fab4500fe39de5'>de5fc5bacb671223f389793ad643cebe520bc292</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/rds/Makefile?h=nds-private-remove&amp;id=99421c1cb27fb837e93b517036fab4500fe39de5'>net/rds/Makefile</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/rds/Makefile?h=nds-private-remove&amp;id=c92816275674c1491ce228ee49aa030a5fa1be04'>c92816275674c1491ce228ee49aa030a5fa1be04</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/rds/Makefile?h=nds-private-remove&amp;id=99421c1cb27fb837e93b517036fab4500fe39de5&amp;id2=c92816275674c1491ce228ee49aa030a5fa1be04'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/rds/Makefile?h=nds-private-remove&amp;id=93362fa47fe98b62e4a34ab408c4a418432e7939'>93362fa47fe98b62e4a34ab408c4a418432e7939</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/rds/Makefile?h=nds-private-remove&amp;id=99421c1cb27fb837e93b517036fab4500fe39de5&amp;id2=93362fa47fe98b62e4a34ab408c4a418432e7939'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace</div><div class='commit-msg'>Pull namespace fixes from Eric Biederman:
 "This tree contains 4 fixes.

  The first is a fix for a race that can causes oopses under the right
  circumstances, and that someone just recently encountered.

  Past that are several small trivial correct fixes. A real issue that
  was blocking development of an out of tree driver, but does not appear
  to have caused any actual problems for in-tree code. A potential
  deadlock that was reported by lockdep. And a deadlock people have
  experienced and took the time to track down caused by a cleanup that
  removed the code to drop a reference count"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  sysctl: Drop reference added by grab_header in proc_sys_readdir
  pid: fix lockdep deadlock warning due to ucount_lock
  libfs: Modify mount_pseudo_xattr to be clear it is not a userspace mount
  mnt: Protect the mountpoint hashtable with mount_lock
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=99421c1cb27fb837e93b517036fab4500fe39de5'>Diffstat</a> (limited to 'net/rds/Makefile')</div><table summary='diffstat' class='diffstat'>