From patchwork Mon Jun 17 00:51:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gaurav Kashyap (QUIC)" X-Patchwork-Id: 13699742 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1DA4C1BC41; Mon, 17 Jun 2024 00:59:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718585959; cv=none; b=TywDmUKkMy9/SjvLukpEaJK4ORBACtALd6ASDfbjRVgwm2IqhQWfHTJIKBdJC+bOPfeZAwMuPTE/HBW6GXGM0DcZphRWT4BupYMQ5rQ7r0F1JowsBjdYh7F/M7jHVufBKvV7cweDh2p3qD8I/5xgd5ZbF68Wf9zxHZgpndnyH/s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718585959; c=relaxed/simple; bh=XMauYqAG8YsGxd2jgwyCk+vpD9o+tyv9DUA3bysfYs0=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=gvYlgXGw7DjHDZ966x6eWlNcrpDrrgNkvVAuvRgax/7hiNxYn/VfsiVG1O4jOCb6daFz2EBfu+5KhG9fB0yip/d78OFD2IV/5PkkLug9OO/MQ4nb6UakbZ+YI0GPNOA0tcSSDlna1i+60PolQ7kSvcRYvIyBvVTk4vUzOXXzqS8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=KpRRzKMB; arc=none smtp.client-ip=205.220.180.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="KpRRzKMB" Received: from pps.filterd (m0279870.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 45H0gIZA006046; Mon, 17 Jun 2024 00:59:01 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= rjyjK2ZepjNa/4NommCIBlFtNNU26xPb3LhncqEiNw4=; b=KpRRzKMBBQJ0wMHy EqEcQ8LFJ6uME5I1YQLPQ3hAnhWUKRzcWJ+T0t5hGg6gGM90BTrImXY1iGUJTNx3 XZyGWKKzj1MeON66nPEjTMLCA21hHJ7/9OkMvzfgRLFK8aPQ6e1ePoPIg7DFTo+T QFWJ3lgldadvksLK8AJ583JvVOKnnje+ZSu+Z4TbQXGTk0uXmOkIMozaMFtBaKOP UQls+IPEss8yiL2gq+EBC4ZAquY1t8R0wsb7rwFGcndUiS5Y+MxmGa8see1qAfeI k3zq0ybeAO8yJXxOMafJ5LFy4MwtkpfbUY/HMSn8AQrsKSeBozly6GMTV0O3XvXY SIRf4w== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3ys31u2dph-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 17 Jun 2024 00:59:01 +0000 (GMT) Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA01.qualcomm.com (8.17.1.19/8.17.1.19) with ESMTPS id 45H0x0lt009632 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 17 Jun 2024 00:59:00 GMT Received: from hu-gaurkash-lv.qualcomm.com (10.49.16.6) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Sun, 16 Jun 2024 17:58:54 -0700 From: Gaurav Kashyap To: , , , , , , , , CC: , , , , , , , , , , , , , , , , , , Gaurav Kashyap Subject: [PATCH v5 06/15] soc: qcom: ice: support for generate, import and prepare key Date: Sun, 16 Jun 2024 17:51:01 -0700 Message-ID: <20240617005825.1443206-7-quic_gaurkash@quicinc.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240617005825.1443206-1-quic_gaurkash@quicinc.com> References: <20240617005825.1443206-1-quic_gaurkash@quicinc.com> Precedence: bulk X-Mailing-List: linux-mmc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: vvmACu2wAa_7rACLP_rRuFbPhcov91pv X-Proofpoint-ORIG-GUID: vvmACu2wAa_7rACLP_rRuFbPhcov91pv X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-06-16_12,2024-06-14_03,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 lowpriorityscore=0 phishscore=0 adultscore=0 priorityscore=1501 spamscore=0 mlxscore=0 malwarescore=0 mlxlogscore=999 bulkscore=0 suspectscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2405170001 definitions=main-2406170006 Wrapped key creation and management using HWKM is currently supported only through Qualcomm's Trustzone. Three new SCM calls have already been added in the scm layer for this purpose. This patch adds support for generate, prepare and import key apis in ICE module and hooks it up the scm calls defined for them. This will eventually plug into the new IOCTLS added for this usecase in the block layer. Tested-by: Neil Armstrong Signed-off-by: Gaurav Kashyap --- drivers/soc/qcom/ice.c | 75 ++++++++++++++++++++++++++++++++++++++++++ include/soc/qcom/ice.h | 8 +++++ 2 files changed, 83 insertions(+) diff --git a/drivers/soc/qcom/ice.c b/drivers/soc/qcom/ice.c index f0e9e0885732..68062b27f40c 100644 --- a/drivers/soc/qcom/ice.c +++ b/drivers/soc/qcom/ice.c @@ -21,6 +21,13 @@ #define AES_256_XTS_KEY_SIZE 64 +/* + * Wrapped key sizes that HWKM expects and manages is different for different + * versions of the hardware. + */ +#define QCOM_ICE_HWKM_WRAPPED_KEY_SIZE(v) \ + ((v) == 1 ? 68 : 100) + /* QCOM ICE registers */ #define QCOM_ICE_REG_VERSION 0x0008 #define QCOM_ICE_REG_FUSE_SETTING 0x0010 @@ -445,6 +452,74 @@ int qcom_ice_derive_sw_secret(struct qcom_ice *ice, const u8 wkey[], } EXPORT_SYMBOL_GPL(qcom_ice_derive_sw_secret); +/** + * qcom_ice_generate_key() - Generate a wrapped key for inline encryption + * @lt_key: longterm wrapped key that is generated, which is + * BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE in size. + * + * Make a scm call into trustzone to generate a wrapped key for storage + * encryption using hwkm. + * + * Return: lt wrapped key size on success; err on failure. + */ +int qcom_ice_generate_key(struct qcom_ice *ice, + u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]) +{ + size_t wk_size = QCOM_ICE_HWKM_WRAPPED_KEY_SIZE(ice->hwkm_version); + + if (!qcom_scm_generate_ice_key(lt_key, wk_size)) + return wk_size; + return 0; +} +EXPORT_SYMBOL_GPL(qcom_ice_generate_key); + +/** + * qcom_ice_prepare_key() - Prepare a longterm wrapped key for inline encryption + * @lt_key: longterm wrapped key that is generated or imported. + * @lt_key_size: size of the longterm wrapped_key + * @eph_key: wrapped key returned which has been wrapped with a per-boot ephemeral key, + * size of which is BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE in size. + * + * Make a scm call into trustzone to prepare a wrapped key for storage + * encryption by rewrapping the longterm wrapped key with a per boot ephemeral + * key using hwkm. + * + * Return: eph wrapped key size on success; err on failure. + */ +int qcom_ice_prepare_key(struct qcom_ice *ice, const u8 *lt_key, size_t lt_key_size, + u8 eph_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]) +{ + size_t wk_size = QCOM_ICE_HWKM_WRAPPED_KEY_SIZE(ice->hwkm_version); + + if (!qcom_scm_prepare_ice_key(lt_key, lt_key_size, eph_key, wk_size)) + return wk_size; + return 0; +} +EXPORT_SYMBOL_GPL(qcom_ice_prepare_key); + +/** + * qcom_ice_import_key() - Import a raw key for inline encryption + * @imp_key: raw key that has to be imported + * @imp_key_size: size of the imported key + * @lt_key: longterm wrapped key that is imported, which is + * BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE in size. + * + * Make a scm call into trustzone to import a raw key for storage encryption + * and generate a longterm wrapped key using hwkm. + * + * Return: lt wrapped key size on success; err on failure. + */ +int qcom_ice_import_key(struct qcom_ice *ice, const u8 *imp_key, size_t imp_key_size, + u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]) +{ + size_t wk_size = QCOM_ICE_HWKM_WRAPPED_KEY_SIZE(ice->hwkm_version); + + if (!qcom_scm_import_ice_key(imp_key, imp_key_size, lt_key, wk_size)) + return wk_size; + return 0; +} +EXPORT_SYMBOL_GPL(qcom_ice_import_key); + static struct qcom_ice *qcom_ice_create(struct device *dev, void __iomem *base) { diff --git a/include/soc/qcom/ice.h b/include/soc/qcom/ice.h index dabe0d3a1fd0..dcf277d196ff 100644 --- a/include/soc/qcom/ice.h +++ b/include/soc/qcom/ice.h @@ -39,5 +39,13 @@ bool qcom_ice_hwkm_supported(struct qcom_ice *ice); int qcom_ice_derive_sw_secret(struct qcom_ice *ice, const u8 wkey[], unsigned int wkey_size, u8 sw_secret[BLK_CRYPTO_SW_SECRET_SIZE]); +int qcom_ice_generate_key(struct qcom_ice *ice, + u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]); +int qcom_ice_prepare_key(struct qcom_ice *ice, + const u8 *lt_key, size_t lt_key_size, + u8 eph_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]); +int qcom_ice_import_key(struct qcom_ice *ice, + const u8 *imp_key, size_t imp_key_size, + u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]); struct qcom_ice *of_qcom_ice_get(struct device *dev); #endif /* __QCOM_ICE_H__ */