net80211_crypto_ccmp.c revision 51e5a319aebb4a8c4d5dce22f31c832366a26943
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
a399b7655a1d835aa8606c2b29e4e777baac8635zf * Use is subject to license terms.
a399b7655a1d835aa8606c2b29e4e777baac8635zf * Copyright (c) 2001 Atsushi Onoe
a399b7655a1d835aa8606c2b29e4e777baac8635zf * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
a399b7655a1d835aa8606c2b29e4e777baac8635zf * All rights reserved.
a399b7655a1d835aa8606c2b29e4e777baac8635zf * Redistribution and use in source and binary forms, with or without
a399b7655a1d835aa8606c2b29e4e777baac8635zf * modification, are permitted provided that the following conditions
a399b7655a1d835aa8606c2b29e4e777baac8635zf * are met:
a399b7655a1d835aa8606c2b29e4e777baac8635zf * 1. Redistributions of source code must retain the above copyright
a399b7655a1d835aa8606c2b29e4e777baac8635zf * notice, this list of conditions and the following disclaimer.
a399b7655a1d835aa8606c2b29e4e777baac8635zf * 2. Redistributions in binary form must reproduce the above copyright
a399b7655a1d835aa8606c2b29e4e777baac8635zf * notice, this list of conditions and the following disclaimer in the
a399b7655a1d835aa8606c2b29e4e777baac8635zf * documentation and/or other materials provided with the distribution.
a399b7655a1d835aa8606c2b29e4e777baac8635zf * 3. The name of the author may not be used to endorse or promote products
a399b7655a1d835aa8606c2b29e4e777baac8635zf * derived from this software without specific prior written permission.
a399b7655a1d835aa8606c2b29e4e777baac8635zf * Alternatively, this software may be distributed under the terms of the
a399b7655a1d835aa8606c2b29e4e777baac8635zf * GNU General Public License ("GPL") version 2 as published by the Free
a399b7655a1d835aa8606c2b29e4e777baac8635zf * Software Foundation.
a399b7655a1d835aa8606c2b29e4e777baac8635zf * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
a399b7655a1d835aa8606c2b29e4e777baac8635zf * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
a399b7655a1d835aa8606c2b29e4e777baac8635zf * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
a399b7655a1d835aa8606c2b29e4e777baac8635zf * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
a399b7655a1d835aa8606c2b29e4e777baac8635zf * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
a399b7655a1d835aa8606c2b29e4e777baac8635zf * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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a399b7655a1d835aa8606c2b29e4e777baac8635zf * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
a399b7655a1d835aa8606c2b29e4e777baac8635zf * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
a399b7655a1d835aa8606c2b29e4e777baac8635zf * IEEE 802.11i CCMP crypto support.
a399b7655a1d835aa8606c2b29e4e777baac8635zfstatic void *ccmp_attach(struct ieee80211com *, struct ieee80211_key *);
a399b7655a1d835aa8606c2b29e4e777baac8635zfstatic int ccmp_encap(struct ieee80211_key *k, mblk_t *, uint8_t);
a399b7655a1d835aa8606c2b29e4e777baac8635zfstatic int ccmp_decap(struct ieee80211_key *, mblk_t *, int);
a399b7655a1d835aa8606c2b29e4e777baac8635zfstatic int ccmp_enmic(struct ieee80211_key *, mblk_t *, int);
a399b7655a1d835aa8606c2b29e4e777baac8635zfstatic int ccmp_demic(struct ieee80211_key *, mblk_t *, int);
5a8842de5fe559531366f065b0f32f31b6dd09b0zfstatic int ccmp_encrypt(struct ieee80211_key *, mblk_t *, int);
5a8842de5fe559531366f065b0f32f31b6dd09b0zfstatic int ccmp_decrypt(struct ieee80211_key *, uint64_t pn, mblk_t *, int);
a399b7655a1d835aa8606c2b29e4e777baac8635zf "AES-CCM",
a399b7655a1d835aa8606c2b29e4e777baac8635zf/* ARGSUSED */
a399b7655a1d835aa8606c2b29e4e777baac8635zfstatic void *
a399b7655a1d835aa8606c2b29e4e777baac8635zfccmp_attach(struct ieee80211com *ic, struct ieee80211_key *k)
a399b7655a1d835aa8606c2b29e4e777baac8635zfstatic void
a399b7655a1d835aa8606c2b29e4e777baac8635zf return (0);
a399b7655a1d835aa8606c2b29e4e777baac8635zf return (1);
a399b7655a1d835aa8606c2b29e4e777baac8635zf * Add privacy headers appropriate for the specified key.
a399b7655a1d835aa8606c2b29e4e777baac8635zfccmp_encap(struct ieee80211_key *k, mblk_t *mp, uint8_t keyid)
a399b7655a1d835aa8606c2b29e4e777baac8635zf * Copy down 802.11 header and add the IV, KeyID, and ExtIV.
a399b7655a1d835aa8606c2b29e4e777baac8635zf ivp[3] = keyid | IEEE80211_WEP_EXTIV; /* KeyID | ExtID */
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * Finally, do software encrypt if neeed.
a399b7655a1d835aa8606c2b29e4e777baac8635zf return (0);
a399b7655a1d835aa8606c2b29e4e777baac8635zf return (1);
a399b7655a1d835aa8606c2b29e4e777baac8635zf * Validate and strip privacy headers (and trailer) for a
a399b7655a1d835aa8606c2b29e4e777baac8635zf * received frame. The specified key should be correct but
a399b7655a1d835aa8606c2b29e4e777baac8635zf * is also verified.
a399b7655a1d835aa8606c2b29e4e777baac8635zfccmp_decap(struct ieee80211_key *k, mblk_t *mp, int hdrlen)
a399b7655a1d835aa8606c2b29e4e777baac8635zf * Header should have extended IV and sequence number;
a399b7655a1d835aa8606c2b29e4e777baac8635zf * verify the former and validate the latter.
a399b7655a1d835aa8606c2b29e4e777baac8635zf if ((ivp[IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV) == 0) {
a399b7655a1d835aa8606c2b29e4e777baac8635zf * No extended IV; discard frame.
a399b7655a1d835aa8606c2b29e4e777baac8635zf return (0);
a399b7655a1d835aa8606c2b29e4e777baac8635zf pn = ieee80211_read_6(ivp[0], ivp[1], ivp[4], ivp[5], ivp[6], ivp[7]);
a399b7655a1d835aa8606c2b29e4e777baac8635zf * Replay violation.
a399b7655a1d835aa8606c2b29e4e777baac8635zf return (0);
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * Check if the device handled the decrypt in hardware.
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * If so we just strip the header; otherwise we need to
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * handle the decrypt in software. Note that for the
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * latter we leave the header in place for use in the
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * decryption work.
a399b7655a1d835aa8606c2b29e4e777baac8635zf return (0);
a399b7655a1d835aa8606c2b29e4e777baac8635zf * Copy up 802.11 header and strip crypto bits.
a399b7655a1d835aa8606c2b29e4e777baac8635zf * Ok to update rsc now.
a399b7655a1d835aa8606c2b29e4e777baac8635zf return (1);
a399b7655a1d835aa8606c2b29e4e777baac8635zf * Add MIC to the frame as needed.
a399b7655a1d835aa8606c2b29e4e777baac8635zf/* ARGSUSED */
a399b7655a1d835aa8606c2b29e4e777baac8635zfccmp_enmic(struct ieee80211_key *k, mblk_t *mp, int force)
a399b7655a1d835aa8606c2b29e4e777baac8635zf return (1);
a399b7655a1d835aa8606c2b29e4e777baac8635zf * Verify and strip MIC from the frame.
a399b7655a1d835aa8606c2b29e4e777baac8635zf/* ARGSUSED */
a399b7655a1d835aa8606c2b29e4e777baac8635zfccmp_demic(struct ieee80211_key *k, mblk_t *mp, int force)
a399b7655a1d835aa8606c2b29e4e777baac8635zf return (1);
5a8842de5fe559531366f065b0f32f31b6dd09b0zfaes_ccm_encrypt(CK_AES_CCM_PARAMS *cmparam, const uint8_t *key, int keylen,
5a8842de5fe559531366f065b0f32f31b6dd09b0zf "aes_ccm_encrypt(len=%d, keylen=%d)", plain_len, keylen);
5a8842de5fe559531366f065b0f32f31b6dd09b0zf /* keys are measured in bits, not bytes, so multiply by 8 */
5a8842de5fe559531366f065b0f32f31b6dd09b0zf ieee80211_dbg(IEEE80211_MSG_CRYPTO, "cm_type=%lx", mech.cm_type);
5a8842de5fe559531366f065b0f32f31b6dd09b0zf ieee80211_dbg(IEEE80211_MSG_CRYPTO, "cm_type=%llx", mech.cm_type);
5a8842de5fe559531366f065b0f32f31b6dd09b0zf rv = crypto_encrypt(&mech, &d1, &crkey, NULL, &d2, NULL);
5a8842de5fe559531366f065b0f32f31b6dd09b0zf return (rv);
5a8842de5fe559531366f065b0f32f31b6dd09b0zfaes_ccm_decrypt(CK_AES_CCM_PARAMS *cmparam, const uint8_t *key, int keylen,
5a8842de5fe559531366f065b0f32f31b6dd09b0zf "aes_ccm_decrypt(len=%d, keylen=%d)", cipher_len, keylen);
5a8842de5fe559531366f065b0f32f31b6dd09b0zf /* keys are measured in bits, not bytes, so multiply by 8 */
5a8842de5fe559531366f065b0f32f31b6dd09b0zf ieee80211_dbg(IEEE80211_MSG_CRYPTO, "cm_type=%lx", mech.cm_type);
5a8842de5fe559531366f065b0f32f31b6dd09b0zf ieee80211_dbg(IEEE80211_MSG_CRYPTO, "cm_type=%llx", mech.cm_type);
5a8842de5fe559531366f065b0f32f31b6dd09b0zf rv = crypto_decrypt(&mech, &d1, &crkey, NULL, &d2, NULL);
5a8842de5fe559531366f065b0f32f31b6dd09b0zf return (rv);
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * For the avoidance of doubt, except that if any license choice other
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * than GPL or LGPL is available it will apply instead, Sun elects to
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * use only the General Public License version 2 (GPLv2) at this time
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * for any software where a choice of GPL license versions is made
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * available with the language indicating that GPLv2 or any later
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * version may be used, or where a choice of which version of the GPL
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * is applied is otherwise unspecified.
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * Host AP crypt: host-based CCMP encryption implementation for Host AP driver
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * Copyright (c) 2003-2004, Jouni Malinen <jkmaline@cc.hut.fi>
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * This program is free software; you can redistribute it and/or modify
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * it under the terms of the GNU General Public License version 2 as
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * published by the Free Software Foundation. See README and COPYING for
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * more details.
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * Alternatively, this software may be distributed under the terms of BSD
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * license.
5a8842de5fe559531366f065b0f32f31b6dd09b0zfstatic void
5a8842de5fe559531366f065b0f32f31b6dd09b0zfccmp_init(struct ieee80211_frame *wh, uint64_t pn, size_t dlen,
5a8842de5fe559531366f065b0f32f31b6dd09b0zf uint8_t b0[AES_BLOCK_LEN], uint8_t aad[2 * AES_BLOCK_LEN])
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * CCM Initial Block:
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * Flag (Include authentication header, M=3 (8-octet MIC),
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * L=1 (2-octet Dlen))
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * Nonce: 0x00 | A2 | PN
5a8842de5fe559531366f065b0f32f31b6dd09b0zf /* b0[1] set below */
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * FC with bits 4..6 and 11..13 masked to zero; 14 is always one
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * A1 | A2 | A3
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * SC with bits 4..15 (seq#) masked to zero
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * A4 (if present)
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * QC (if present)
5a8842de5fe559531366f065b0f32f31b6dd09b0zf /* aad[1] set below */
5a8842de5fe559531366f065b0f32f31b6dd09b0zf /* we know 3 addresses are contiguous */
5a8842de5fe559531366f065b0f32f31b6dd09b0zf (void) memcpy(aad + 4, wh->i_addr1, 3 * IEEE80211_ADDR_LEN);
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * Construct variable-length portion of AAD based
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * on whether this is a 4-address frame/QOS frame.
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * We always zero-pad to 32 bytes before running it
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * through the cipher.
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * We also fill in the priority bits of the CCM
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * initial block as we know whether or not we have
5a8842de5fe559531366f065b0f32f31b6dd09b0zf * a QOS frame.
5a8842de5fe559531366f065b0f32f31b6dd09b0zfccmp_encrypt(struct ieee80211_key *key, mblk_t *mp, int hdrlen)
51e5a319aebb4a8c4d5dce22f31c832366a26943Quaker Fang pos, data_len, pos, data_len + IEEE80211_WEP_MICLEN);
5a8842de5fe559531366f065b0f32f31b6dd09b0zfccmp_decrypt(struct ieee80211_key *key, uint64_t pn, mblk_t *mp, int hdrlen)