/*
 * Copyright 2014-2015, 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 <net/mac80211.h>
#include "key.h"
#include "aes_gcm.h"

int ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
			      u8 *data, size_t data_len, u8 *mic)
{
	struct scatterlist sg[3];
	struct aead_request *aead_req;
	int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm);
	u8 *__aad;

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

	__aad = (u8 *)aead_req + reqsize;
	memcpy(__aad, aad, GCM_AAD_LEN);

	sg_init_table(sg, 3);
	sg_set_buf(&sg[0], &__aad[2], be16_to_cpup((__be16 *)__aad));
	sg_set_buf(&sg[1], data, data_len);
	sg_set_buf(&sg[2], mic, IEEE80211_GCMP_MIC_LEN);

	aead_request_set_tfm(aead_req, tfm);
	aead_request_set_crypt(aead_req, sg, sg, data_len, j_0);
	aead_request_set_ad(aead_req, sg[0].length);

	crypto_aead_encrypt(aead_req);
	kzfree(aead_req);
	return 0;
}

int ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
			      u8 *data, size_t data_len, u8 *mic)
{
	struct scatterlist sg[3];
	struct aead_request *aead_req;
	int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm);
	u8 *__aad;
	int err;

	if (data_len == 0)
		return -EINVAL;

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

	__aad = (u8 *)aead_req + reqsize;
	memcpy(__aad, aad, GCM_AAD_LEN);

	sg_init_table(sg, 3);
	sg_set_buf(&sg[0], &__aad[2], be16_to_cpup((__be16 *)__aad));
	sg_set_buf(&sg[1], data, data_len);
	sg_set_buf(&sg[2], mic, IEEE80211_GCMP_MIC_LEN);

	aead_request_set_tfm(aead_req, tfm);
	aead_request_set_crypt(aead_req, sg, sg,
			       data_len + IEEE80211_GCMP_MIC_LEN, j_0);
	aead_request_set_ad(aead_req, sg[0].length);

	err = crypto_aead_decrypt(aead_req);
	kzfree(aead_req);

	return err;
}

struct crypto_aead *ieee80211_aes_gcm_key_setup_encrypt(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)
		goto free_aead;
	err = crypto_aead_setauthsize(tfm, IEEE80211_GCMP_MIC_LEN);
	if (err)
		goto free_aead;

	return tfm;

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

void ieee80211_aes_gcm_key_free(struct crypto_aead *tfm)
{
	crypto_free_aead(tfm);
}
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=62c61514191bfe5731b43619b9b1bf4b423beeb0'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation?id=62c61514191bfe5731b43619b9b1bf4b423beeb0'>Documentation</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation/devicetree?id=62c61514191bfe5731b43619b9b1bf4b423beeb0'>devicetree</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation/devicetree/bindings?id=62c61514191bfe5731b43619b9b1bf4b423beeb0'>bindings</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='62c61514191bfe5731b43619b9b1bf4b423beeb0'/><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>Stephen Hemminger &lt;sthemmin@microsoft.com&gt;</td><td class='right'>2016-10-23 09:32:34 -0700</td></tr>
<tr><th>committer</th><td>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2016-10-26 12:05:34 +0200</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/devicetree/bindings?id=62c61514191bfe5731b43619b9b1bf4b423beeb0'>62c61514191bfe5731b43619b9b1bf4b423beeb0</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Documentation/devicetree/bindings?id=62c61514191bfe5731b43619b9b1bf4b423beeb0'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=62c61514191bfe5731b43619b9b1bf4b423beeb0'>15aeb0bfc15d6092a856b92e0b74b3db2a1f318d</a> /<a href='/cgit.cgi/linux/net-next.git/tree/Documentation/devicetree/bindings?id=62c61514191bfe5731b43619b9b1bf4b423beeb0'>Documentation/devicetree/bindings</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/devicetree/bindings?id=07d9a380680d1c0eb51ef87ff2eab5c994949e69'>07d9a380680d1c0eb51ef87ff2eab5c994949e69</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/devicetree/bindings?id=62c61514191bfe5731b43619b9b1bf4b423beeb0&amp;id2=07d9a380680d1c0eb51ef87ff2eab5c994949e69'>diff</a>)</td></tr></table>
<div class='commit-subject'>doc: Add missing parameter for msi_setup</div><div class='commit-msg'>commit 92ca8d20dee2 ("genirq/msi: Switch to new irq spreading")
introduced new parameter to msi_init_setup and but did not update
docbook comments. Fixes 'make htmldocs' warning.

Signed-off-by: Stephen Hemminger &lt;sthemmin@microsoft.com&gt;
Cc: bhelgaas@google.com
Cc: linux-pci@vger.kernel.org
Signed-off-by: Thomas Gleixner &lt;tglx@linutronix.de&gt;

</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=62c61514191bfe5731b43619b9b1bf4b423beeb0'>Diffstat</a> (limited to 'Documentation/devicetree/bindings')</div><table summary='diffstat' class='diffstat'>