/*
 * AES-GMAC for IEEE 802.11 BIP-GMAC-128 and BIP-GMAC-256
 * Copyright 2015, Qualcomm Atheros, 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/kernel.h>
#include <linux/types.h>
#include <linux/err.h>
#include <crypto/aead.h>
#include <crypto/aes.h>

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

int ieee80211_aes_gmac(struct crypto_aead *tfm, const u8 *aad, u8 *nonce,
		       const u8 *data, size_t data_len, u8 *mic)
{
	struct scatterlist sg[4];
	u8 *zero, *__aad, iv[AES_BLOCK_SIZE];
	struct aead_request *aead_req;
	int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm);

	if (data_len < GMAC_MIC_LEN)
		return -EINVAL;

	aead_req = kzalloc(reqsize + GMAC_MIC_LEN + GMAC_AAD_LEN, GFP_ATOMIC);
	if (!aead_req)
		return -ENOMEM;

	zero = (u8 *)aead_req + reqsize;
	__aad = zero + GMAC_MIC_LEN;
	memcpy(__aad, aad, GMAC_AAD_LEN);

	sg_init_table(sg, 4);
	sg_set_buf(&sg[0], __aad, GMAC_AAD_LEN);
	sg_set_buf(&sg[1], data, data_len - GMAC_MIC_LEN);
	sg_set_buf(&sg[2], zero, GMAC_MIC_LEN);
	sg_set_buf(&sg[3], mic, GMAC_MIC_LEN);

	memcpy(iv, nonce, GMAC_NONCE_LEN);
	memset(iv + GMAC_NONCE_LEN, 0, sizeof(iv) - GMAC_NONCE_LEN);
	iv[AES_BLOCK_SIZE - 1] = 0x01;

	aead_request_set_tfm(aead_req, tfm);
	aead_request_set_crypt(aead_req, sg, sg, 0, iv);
	aead_request_set_ad(aead_req, GMAC_AAD_LEN + data_len);

	crypto_aead_encrypt(aead_req);
	kzfree(aead_req);

	return 0;
}

struct crypto_aead *ieee80211_aes_gmac_key_setup(const u8 key[],
						 size_t key_len)
{
	struct crypto_aead *tfm;
	int err;

	tfm = crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC);
	if (IS_ERR(tfm))
		return tfm;

	err = crypto_aead_setkey(tfm, key, key_len);
	if (!err)
		err = crypto_aead_setauthsize(tfm, GMAC_MIC_LEN);
	if (!err)
		return tfm;

	crypto_free_aead(tfm);
	return ERR_PTR(err);
}

void ieee80211_aes_gmac_key_free(struct crypto_aead *tfm)
{
	crypto_free_aead(tfm);
}
t/ipx/sysctl_net_ipx.c?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/net/ipx/sysctl_net_ipx.c'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/ipx?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>ipx</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/ipx/sysctl_net_ipx.c?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>sysctl_net_ipx.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='7a7b5df84b6b4e5d599c7289526eed96541a0654'/><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>Johan Hovold &lt;johan@kernel.org&gt;</td><td class='right'>2017-01-30 11:26:38 +0100</td></tr>
<tr><th>committer</th><td>Jiri Kosina &lt;jkosina@suse.cz&gt;</td><td class='right'>2017-01-31 12:59:32 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/ipx/sysctl_net_ipx.c?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>7a7b5df84b6b4e5d599c7289526eed96541a0654</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/ipx/sysctl_net_ipx.c?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>cf7514c7ddf4410fe37ca9099a2785e1cf08fa7d</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/ipx/sysctl_net_ipx.c?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>net/ipx/sysctl_net_ipx.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/ipx/sysctl_net_ipx.c?id=877a021e08ccb6434718c0cc781fdf943c884cc0'>877a021e08ccb6434718c0cc781fdf943c884cc0</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/ipx/sysctl_net_ipx.c?id=7a7b5df84b6b4e5d599c7289526eed96541a0654&amp;id2=877a021e08ccb6434718c0cc781fdf943c884cc0'>diff</a>)</td></tr></table>
<div class='commit-subject'>HID: cp2112: fix sleep-while-atomic</div><div class='commit-msg'>A recent commit fixing DMA-buffers on stack added a shared transfer
buffer protected by a spinlock. This is broken as the USB HID request
callbacks can sleep. Fix this up by replacing the spinlock with a mutex.

Fixes: 1ffb3c40ffb5 ("HID: cp2112: make transfer buffers DMA capable")
Cc: stable &lt;stable@vger.kernel.org&gt;	# 4.9
Signed-off-by: Johan Hovold &lt;johan@kernel.org&gt;
Reviewed-by: Benjamin Tissoires &lt;benjamin.tissoires@redhat.com&gt;
Signed-off-by: Jiri Kosina &lt;jkosina@suse.cz&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>Diffstat</a> (limited to 'net/ipx/sysctl_net_ipx.c')</div><table summary='diffstat' class='diffstat'>