From patchwork Tue Oct 20 12:58:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?SsOpcsO0bWUgUG91aWxsZXI=?= X-Patchwork-Id: 11846813 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MSGID_FROM_MTA_HEADER,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 89C5DC43467 for ; Tue, 20 Oct 2020 13:00:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1D7EC22475 for ; Tue, 20 Oct 2020 13:00:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=silabs.onmicrosoft.com header.i=@silabs.onmicrosoft.com header.b="FsrLs5Qz" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2407021AbgJTM7n (ORCPT ); Tue, 20 Oct 2020 08:59:43 -0400 Received: from mail-dm6nam12on2067.outbound.protection.outlook.com ([40.107.243.67]:23584 "EHLO NAM12-DM6-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2406897AbgJTM7k (ORCPT ); Tue, 20 Oct 2020 08:59:40 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=MqLG8XPSJokisnKnFd6SAOJ+L2Ujkgtgh+QZW3PIupp0Ubd0DSCUlgxkbRzwJpTYCUCS6WhLygNn1J6s83onvotZFxcI81howbdOMuWL1uAD1RhfusfqBkkD1Jbrp4IZAyEronZafQdU9f2YpiFLzlzqU3oENUf9shVeFwxIknPmQJ0bShMWld/qDUwAJmhC52xBkT71mjEK5nqBdETf1PaMowc20HzDsjvx1bMPaY8KZaiLvI+g90193RIepROT8LGy6yzEBywT9+VvxKPXkLdPPrNVoJHtgmQIF8EMNS2Z7pJ1eTZdfHxMt6Y0tXOBP0sYFZMUGV6IkCAvr+wHow== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=WUnsoPoplvHUt9Xza9j1HavLwuWmOnSVnZZ+2HeiqCQ=; b=Mp60RRZGciOkFGJRt3b46Qlef92b8nHHkd8DowkC0B6YLFjs0gnpAh8BpUTtM+JfQyj0Qmz7KmJlu35EuBzS6Dl42MWqAc5ceKNfKOwnqP9ZuuWNdtL9J1mnfLZwVbOHvLs6oj6AobdLnsQ1k7BR6BvKB102EISD8Fr4MpqSty9Fiw0BjIzAur3j3fbN+XHhu+8Wq8Q+M0O+ZAWx3CZNi/gjs1sd/xk8yuJuAqc/thochrntDpint4XUAPsSw8S6fO3fvJuG+ulxC61JigxeGGDMS2OXjHvC/Z4QWVmqI5RZu+gns32G0FBipGY4NFGTPtIksl92Jj1AkvEy8zOEiQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=silabs.com; dmarc=pass action=none header.from=silabs.com; dkim=pass header.d=silabs.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=silabs.onmicrosoft.com; s=selector2-silabs-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=WUnsoPoplvHUt9Xza9j1HavLwuWmOnSVnZZ+2HeiqCQ=; b=FsrLs5QzqcE1srtvE3/GVGExgDUV+iCUMSfLQbt2mqb7OiecIgKmmn1Ki45YRDZCxT7W3NsWHeSssZeT98SxWUcExbJx6b0k6GF3XAFGyEpLaJ6/FXLkhFArHa4msGFbxqaoXRUR47bW7nbqJNHaQCR/NJBFabUPYxwnzyZv4O4= Authentication-Results: vger.kernel.org; dkim=none (message not signed) header.d=none;vger.kernel.org; dmarc=none action=none header.from=silabs.com; Received: from SN6PR11MB2718.namprd11.prod.outlook.com (2603:10b6:805:63::18) by SN6PR11MB2656.namprd11.prod.outlook.com (2603:10b6:805:58::28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3477.28; Tue, 20 Oct 2020 12:59:14 +0000 Received: from SN6PR11MB2718.namprd11.prod.outlook.com ([fe80::4f5:fbe5:44a7:cb8a]) by SN6PR11MB2718.namprd11.prod.outlook.com ([fe80::4f5:fbe5:44a7:cb8a%5]) with mapi id 15.20.3477.028; Tue, 20 Oct 2020 12:59:14 +0000 From: Jerome Pouiller To: linux-wireless@vger.kernel.org, netdev@vger.kernel.org Cc: devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, Greg Kroah-Hartman , Kalle Valo , "David S . Miller" , devicetree@vger.kernel.org, Rob Herring , linux-mmc@vger.kernel.org, =?utf-8?q?Pali_Roh=C3=A1r?= , Ulf Hansson , =?utf-8?b?SsOpcsO0bWUgUG91aWxsZXI=?= Subject: [PATCH v2 14/24] wfx: add key.c/key.h Date: Tue, 20 Oct 2020 14:58:07 +0200 Message-Id: <20201020125817.1632995-15-Jerome.Pouiller@silabs.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201020125817.1632995-1-Jerome.Pouiller@silabs.com> References: <20201020125817.1632995-1-Jerome.Pouiller@silabs.com> X-Originating-IP: [37.71.187.125] X-ClientProxiedBy: PR3P192CA0026.EURP192.PROD.OUTLOOK.COM (2603:10a6:102:56::31) To SN6PR11MB2718.namprd11.prod.outlook.com (2603:10b6:805:63::18) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from pc-42.silabs.com (37.71.187.125) by PR3P192CA0026.EURP192.PROD.OUTLOOK.COM (2603:10a6:102:56::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3477.21 via Frontend Transport; Tue, 20 Oct 2020 12:59:12 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 1f2a3229-e8d2-4679-15f5-08d874f7f255 X-MS-TrafficTypeDiagnostic: SN6PR11MB2656: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:376; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: e0Cp5xPnAdwe91UZxn87pILUDo1eXFsw6HD6otmVr7oZ/TE4Gu0v1lFai7TwhBRR4H0xa4094YLcH8/bYio5mvIgltPM/EfQ2lWR87yKqrNK+z7h0+xfgoqrvDwACqhaX8Z1hw7o/IaAsohwoCZGz98kq5cTI04MH1AmKs7Vobky89+jm2sh8gRaI9Wbd8GU4q17tC0w0OcBnubzyQqAZMw+1WiTs6/xRfmtc+STU7jM7RWa6SVO2QNbtjrmDHeMA1ZRj5JQksiDDbljvIhN4IKoIQw/gsBbcctwcU7pICYNmNNM/nRzwJYi6YCBE3urjVM+Uo1GlRg14Qnvxbf2hw== X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SN6PR11MB2718.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(396003)(366004)(136003)(346002)(376002)(39840400004)(186003)(316002)(4326008)(107886003)(8676002)(86362001)(26005)(2906002)(7696005)(478600001)(16526019)(956004)(6486002)(52116002)(36756003)(8936002)(2616005)(54906003)(5660300002)(1076003)(7416002)(66574015)(6666004)(66556008)(66476007)(66946007)(83380400001);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: silabs.com X-MS-Exchange-CrossTenant-Network-Message-Id: 1f2a3229-e8d2-4679-15f5-08d874f7f255 X-MS-Exchange-CrossTenant-AuthSource: SN6PR11MB2718.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Oct 2020 12:59:14.5531 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 54dbd822-5231-4b20-944d-6f4abcd541fb X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 0LYes3wWE+oNyygc7LI9sRpP5Bf3rP/+GXfZFACK8eeecxq/ssSP0VsKIMw+GEK7QwCfiNwJZbSs6VqEGNW10w== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR11MB2656 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Jérôme Pouiller Signed-off-by: Jérôme Pouiller --- drivers/net/wireless/silabs/wfx/key.c | 241 ++++++++++++++++++++++++++ drivers/net/wireless/silabs/wfx/key.h | 20 +++ 2 files changed, 261 insertions(+) create mode 100644 drivers/net/wireless/silabs/wfx/key.c create mode 100644 drivers/net/wireless/silabs/wfx/key.h diff --git a/drivers/net/wireless/silabs/wfx/key.c b/drivers/net/wireless/silabs/wfx/key.c new file mode 100644 index 000000000000..2ab82bed4c1b --- /dev/null +++ b/drivers/net/wireless/silabs/wfx/key.c @@ -0,0 +1,241 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Key management related functions. + * + * Copyright (c) 2017-2020, Silicon Laboratories, Inc. + * Copyright (c) 2010, ST-Ericsson + */ +#include +#include + +#include "key.h" +#include "wfx.h" +#include "hif_tx_mib.h" + +static int wfx_alloc_key(struct wfx_dev *wdev) +{ + int idx; + + idx = ffs(~wdev->key_map) - 1; + if (idx < 0 || idx >= MAX_KEY_ENTRIES) + return -1; + + wdev->key_map |= BIT(idx); + return idx; +} + +static void wfx_free_key(struct wfx_dev *wdev, int idx) +{ + WARN(!(wdev->key_map & BIT(idx)), "inconsistent key allocation"); + wdev->key_map &= ~BIT(idx); +} + +static u8 fill_wep_pair(struct hif_wep_pairwise_key *msg, + struct ieee80211_key_conf *key, u8 *peer_addr) +{ + WARN(key->keylen > sizeof(msg->key_data), "inconsistent data"); + msg->key_length = key->keylen; + memcpy(msg->key_data, key->key, key->keylen); + ether_addr_copy(msg->peer_address, peer_addr); + return HIF_KEY_TYPE_WEP_PAIRWISE; +} + +static u8 fill_wep_group(struct hif_wep_group_key *msg, + struct ieee80211_key_conf *key) +{ + WARN(key->keylen > sizeof(msg->key_data), "inconsistent data"); + msg->key_id = key->keyidx; + msg->key_length = key->keylen; + memcpy(msg->key_data, key->key, key->keylen); + return HIF_KEY_TYPE_WEP_DEFAULT; +} + +static u8 fill_tkip_pair(struct hif_tkip_pairwise_key *msg, + struct ieee80211_key_conf *key, u8 *peer_addr) +{ + u8 *keybuf = key->key; + + WARN(key->keylen != sizeof(msg->tkip_key_data) + + sizeof(msg->tx_mic_key) + + sizeof(msg->rx_mic_key), "inconsistent data"); + memcpy(msg->tkip_key_data, keybuf, sizeof(msg->tkip_key_data)); + keybuf += sizeof(msg->tkip_key_data); + memcpy(msg->tx_mic_key, keybuf, sizeof(msg->tx_mic_key)); + keybuf += sizeof(msg->tx_mic_key); + memcpy(msg->rx_mic_key, keybuf, sizeof(msg->rx_mic_key)); + ether_addr_copy(msg->peer_address, peer_addr); + return HIF_KEY_TYPE_TKIP_PAIRWISE; +} + +static u8 fill_tkip_group(struct hif_tkip_group_key *msg, + struct ieee80211_key_conf *key, + struct ieee80211_key_seq *seq, + enum nl80211_iftype iftype) +{ + u8 *keybuf = key->key; + + WARN(key->keylen != sizeof(msg->tkip_key_data) + + 2 * sizeof(msg->rx_mic_key), "inconsistent data"); + msg->key_id = key->keyidx; + memcpy(msg->rx_sequence_counter, + &seq->tkip.iv16, sizeof(seq->tkip.iv16)); + memcpy(msg->rx_sequence_counter + sizeof(u16), + &seq->tkip.iv32, sizeof(seq->tkip.iv32)); + memcpy(msg->tkip_key_data, keybuf, sizeof(msg->tkip_key_data)); + keybuf += sizeof(msg->tkip_key_data); + if (iftype == NL80211_IFTYPE_AP) + // Use Tx MIC Key + memcpy(msg->rx_mic_key, keybuf + 0, sizeof(msg->rx_mic_key)); + else + // Use Rx MIC Key + memcpy(msg->rx_mic_key, keybuf + 8, sizeof(msg->rx_mic_key)); + return HIF_KEY_TYPE_TKIP_GROUP; +} + +static u8 fill_ccmp_pair(struct hif_aes_pairwise_key *msg, + struct ieee80211_key_conf *key, u8 *peer_addr) +{ + WARN(key->keylen != sizeof(msg->aes_key_data), "inconsistent data"); + ether_addr_copy(msg->peer_address, peer_addr); + memcpy(msg->aes_key_data, key->key, key->keylen); + return HIF_KEY_TYPE_AES_PAIRWISE; +} + +static u8 fill_ccmp_group(struct hif_aes_group_key *msg, + struct ieee80211_key_conf *key, + struct ieee80211_key_seq *seq) +{ + WARN(key->keylen != sizeof(msg->aes_key_data), "inconsistent data"); + memcpy(msg->aes_key_data, key->key, key->keylen); + memcpy(msg->rx_sequence_counter, seq->ccmp.pn, sizeof(seq->ccmp.pn)); + memreverse(msg->rx_sequence_counter, sizeof(seq->ccmp.pn)); + msg->key_id = key->keyidx; + return HIF_KEY_TYPE_AES_GROUP; +} + +static u8 fill_sms4_pair(struct hif_wapi_pairwise_key *msg, + struct ieee80211_key_conf *key, u8 *peer_addr) +{ + u8 *keybuf = key->key; + + WARN(key->keylen != sizeof(msg->wapi_key_data) + + sizeof(msg->mic_key_data), "inconsistent data"); + ether_addr_copy(msg->peer_address, peer_addr); + memcpy(msg->wapi_key_data, keybuf, sizeof(msg->wapi_key_data)); + keybuf += sizeof(msg->wapi_key_data); + memcpy(msg->mic_key_data, keybuf, sizeof(msg->mic_key_data)); + msg->key_id = key->keyidx; + return HIF_KEY_TYPE_WAPI_PAIRWISE; +} + +static u8 fill_sms4_group(struct hif_wapi_group_key *msg, + struct ieee80211_key_conf *key) +{ + u8 *keybuf = key->key; + + WARN(key->keylen != sizeof(msg->wapi_key_data) + + sizeof(msg->mic_key_data), "inconsistent data"); + memcpy(msg->wapi_key_data, keybuf, sizeof(msg->wapi_key_data)); + keybuf += sizeof(msg->wapi_key_data); + memcpy(msg->mic_key_data, keybuf, sizeof(msg->mic_key_data)); + msg->key_id = key->keyidx; + return HIF_KEY_TYPE_WAPI_GROUP; +} + +static u8 fill_aes_cmac_group(struct hif_igtk_group_key *msg, + struct ieee80211_key_conf *key, + struct ieee80211_key_seq *seq) +{ + WARN(key->keylen != sizeof(msg->igtk_key_data), "inconsistent data"); + memcpy(msg->igtk_key_data, key->key, key->keylen); + memcpy(msg->ipn, seq->aes_cmac.pn, sizeof(seq->aes_cmac.pn)); + memreverse(msg->ipn, sizeof(seq->aes_cmac.pn)); + msg->key_id = key->keyidx; + return HIF_KEY_TYPE_IGTK_GROUP; +} + +static int wfx_add_key(struct wfx_vif *wvif, struct ieee80211_sta *sta, + struct ieee80211_key_conf *key) +{ + int ret; + struct hif_req_add_key k = { }; + struct ieee80211_key_seq seq; + struct wfx_dev *wdev = wvif->wdev; + int idx = wfx_alloc_key(wvif->wdev); + bool pairwise = key->flags & IEEE80211_KEY_FLAG_PAIRWISE; + + WARN(key->flags & IEEE80211_KEY_FLAG_PAIRWISE && !sta, "inconsistent data"); + ieee80211_get_key_rx_seq(key, 0, &seq); + if (idx < 0) + return -EINVAL; + k.int_id = wvif->id; + k.entry_index = idx; + if (key->cipher == WLAN_CIPHER_SUITE_WEP40 || + key->cipher == WLAN_CIPHER_SUITE_WEP104) { + if (pairwise) + k.type = fill_wep_pair(&k.key.wep_pairwise_key, key, + sta->addr); + else + k.type = fill_wep_group(&k.key.wep_group_key, key); + } else if (key->cipher == WLAN_CIPHER_SUITE_TKIP) { + if (pairwise) + k.type = fill_tkip_pair(&k.key.tkip_pairwise_key, key, + sta->addr); + else + k.type = fill_tkip_group(&k.key.tkip_group_key, key, + &seq, wvif->vif->type); + } else if (key->cipher == WLAN_CIPHER_SUITE_CCMP) { + if (pairwise) + k.type = fill_ccmp_pair(&k.key.aes_pairwise_key, key, + sta->addr); + else + k.type = fill_ccmp_group(&k.key.aes_group_key, key, + &seq); + } else if (key->cipher == WLAN_CIPHER_SUITE_SMS4) { + if (pairwise) + k.type = fill_sms4_pair(&k.key.wapi_pairwise_key, key, + sta->addr); + else + k.type = fill_sms4_group(&k.key.wapi_group_key, key); + } else if (key->cipher == WLAN_CIPHER_SUITE_AES_CMAC) { + k.type = fill_aes_cmac_group(&k.key.igtk_group_key, key, &seq); + key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIE; + } else { + dev_warn(wdev->dev, "unsupported key type %d\n", key->cipher); + wfx_free_key(wdev, idx); + return -EOPNOTSUPP; + } + ret = hif_add_key(wdev, &k); + if (ret) { + wfx_free_key(wdev, idx); + return -EOPNOTSUPP; + } + key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE | + IEEE80211_KEY_FLAG_RESERVE_TAILROOM; + key->hw_key_idx = idx; + return 0; +} + +static int wfx_remove_key(struct wfx_vif *wvif, struct ieee80211_key_conf *key) +{ + WARN(key->hw_key_idx >= MAX_KEY_ENTRIES, "corrupted hw_key_idx"); + wfx_free_key(wvif->wdev, key->hw_key_idx); + return hif_remove_key(wvif->wdev, key->hw_key_idx); +} + +int wfx_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, + struct ieee80211_vif *vif, struct ieee80211_sta *sta, + struct ieee80211_key_conf *key) +{ + int ret = -EOPNOTSUPP; + struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; + + mutex_lock(&wvif->wdev->conf_mutex); + if (cmd == SET_KEY) + ret = wfx_add_key(wvif, sta, key); + if (cmd == DISABLE_KEY) + ret = wfx_remove_key(wvif, key); + mutex_unlock(&wvif->wdev->conf_mutex); + return ret; +} + diff --git a/drivers/net/wireless/silabs/wfx/key.h b/drivers/net/wireless/silabs/wfx/key.h new file mode 100644 index 000000000000..70a44d0ca35e --- /dev/null +++ b/drivers/net/wireless/silabs/wfx/key.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Implementation of mac80211 API. + * + * Copyright (c) 2017-2020, Silicon Laboratories, Inc. + * Copyright (c) 2010, ST-Ericsson + */ +#ifndef WFX_KEY_H +#define WFX_KEY_H + +#include + +struct wfx_dev; +struct wfx_vif; + +int wfx_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, + struct ieee80211_vif *vif, struct ieee80211_sta *sta, + struct ieee80211_key_conf *key); + +#endif /* WFX_STA_H */