From patchwork Wed Dec 23 15:39:15 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: 351740 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=-16.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, MSGID_FROM_MTA_HEADER, 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 CD809C4332E for ; Wed, 23 Dec 2020 15:44:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B465020639 for ; Wed, 23 Dec 2020 15:44:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729229AbgLWPlm (ORCPT ); Wed, 23 Dec 2020 10:41:42 -0500 Received: from mail-mw2nam12on2073.outbound.protection.outlook.com ([40.107.244.73]:3743 "EHLO NAM12-MW2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728625AbgLWPli (ORCPT ); Wed, 23 Dec 2020 10:41:38 -0500 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=VpJ6Hkvlcyz6O/xpYHalCqdCV1kgzOJZcyBBvpM8QTYPVhAHGRgGaz4//Y5o1j2OuxaINey0gZeKaYUbA9jr7z5DCYVuyg2T/JR3/GDQOLmVyzgB3DHwcncQ+Iz9HswMgtjON2I+Hyhl8rYs/Pms8vR7IDIvCIkmkrLm3NufVOK0ziQPekzVXeOGTbKOHRU7fgZcFkfvDNgae2iNnju8KHJMz/iyE1w6ty8nndvSCmQWUfgmzpLaWmDyWPQwYlfPjKMtOTx0r4oE3vQTHM4yuK9zoVKL0Yh+J49oMTuH9WG5s5iDC4OhOHavjJvLDfltCNq0yI6wenR+RFzUOTjWIw== 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=2+4PtQf91r0KNW/6Z6y5DhWrmuV35P8QEkzoEw7Y4z0=; b=gU+Cb4/M7MZ1QOIQPupPwljtWHajy2/w2+lrBkdkfy2Og34oYNyBKtYjsQVhz2upqF+QJFiGLd7EUmEYbfTc/kD653BP1i9gEcSOQArhaX0ZNf/FbeH8LZjhsfXE3pdkAfCNt32BJFD6+ATOWA+6tbtSYfH8vorLivnezsHKwuRW0Sp4bH1221Yq8TXQv+8TigV6pQ34MQsjSmIHPkl7ge68ewBadbG/cn/yPvdmHmTLcnXRdMpFTLjdLl2pWjxCU666hb+R5cSTkOuTuMd6v+A7cAq2v8mXN7jeBhxHS0pOacipi1hA3QuZSAiAD5JNl6AyIbDoAITjKErAwgz6Jw== 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=2+4PtQf91r0KNW/6Z6y5DhWrmuV35P8QEkzoEw7Y4z0=; b=Xl477RvPmab27hT4kIrqynhiI3hK9i46kGNPuEn9dpKkAYfaGaeCcH+xBEEk6mMYuws/3GMFsRy0LGZXqT/R+U89PXbyTLEYUSQ7jZFzDb6edjEk7XNCR4i/ZyWIKagSJvCU7GM4u7wBOCilkLu3GT2I+Acf+tXOyWZM3KJz0OE= 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 SN6PR11MB2815.namprd11.prod.outlook.com (2603:10b6:805:62::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3676.25; Wed, 23 Dec 2020 15:40:14 +0000 Received: from SN6PR11MB2718.namprd11.prod.outlook.com ([fe80::a989:f850:6736:97ca]) by SN6PR11MB2718.namprd11.prod.outlook.com ([fe80::a989:f850:6736:97ca%5]) with mapi id 15.20.3700.026; Wed, 23 Dec 2020 15:40:14 +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?SsOpcsO0bWUg?= =?utf-8?q?Pouiller?= Subject: [PATCH v4 14/24] wfx: add key.c/key.h Date: Wed, 23 Dec 2020 16:39:15 +0100 Message-Id: <20201223153925.73742-15-Jerome.Pouiller@silabs.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201223153925.73742-1-Jerome.Pouiller@silabs.com> References: <20201223153925.73742-1-Jerome.Pouiller@silabs.com> X-Originating-IP: [82.67.86.106] X-ClientProxiedBy: SA0PR12CA0024.namprd12.prod.outlook.com (2603:10b6:806:6f::29) 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 (82.67.86.106) by SA0PR12CA0024.namprd12.prod.outlook.com (2603:10b6:806:6f::29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3700.27 via Frontend Transport; Wed, 23 Dec 2020 15:40:12 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 1796f047-68d7-45c9-497d-08d8a7590aa6 X-MS-TrafficTypeDiagnostic: SN6PR11MB2815: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:376; 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+ + 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..eba7ac56080c --- /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