From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D58A9C43334 for ; Thu, 23 Jun 2022 06:18:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=OcWGEU1/eTC8llOOcf1i7IEydBqhfss00/A8zkFNilQ=; b=BbWApJCrIJoYmrZC2AVD6Dafwk EEWNbWFcCgq/prjHF0LA2NkE7XUResitoqG0LS39T1UwqxF9mz1yHazJVro4iHAdhTRktr9eCer4q zDr3spjwl9ey4qE/1+6mIFLmIsy2X6u4T8LS52/vbi+N+59KPmCgv/ud0jxUWnifBTYj7hOQQjd/t S3uoOo8TVJGT142fA81In3Xv0NgNPP2wekCB9vJ7hB8+6kIumxMTQoaI+hnMpa5fjlXM3K/qagdgJ jmMLIwWmsdTckj4oSne3j9szpV2clxEY5mwaLPcf7WeFQsxvHuxWTLcUoc16Cye43bNQEJx6Mf2I7 flnE9X2A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o4GAp-00Ddv1-Ey; Thu, 23 Jun 2022 06:18:39 +0000 Received: from smtp-out1.suse.de ([195.135.220.28]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o4G9v-00DdPb-V7 for linux-nvme@lists.infradead.org; Thu, 23 Jun 2022 06:17:50 +0000 Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out1.suse.de (Postfix) with ESMTP id 06EDB21C85; Thu, 23 Jun 2022 06:17:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1655965056; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=OcWGEU1/eTC8llOOcf1i7IEydBqhfss00/A8zkFNilQ=; b=IF9OIhOopHDlMCWtqg83Od8igt+xpf3MN9CNVCvQplTtfqxIxdL70d4XLzhrDlMBhzkndq faY4D6uFQNaFUs+y0auP/iP7/14hXdp0GNt3OR7o+XWec8d9+hcY/9jwYKgfK2+PXNdvhj 3+RIgtHfJOo0da8wZVnpuYnj1tBDbyo= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1655965056; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=OcWGEU1/eTC8llOOcf1i7IEydBqhfss00/A8zkFNilQ=; b=nN9HkkdYjfCmGrIl6PXu7ZVtGQSuOsZqC42FRKRLqjVrU6laMN1EMJK24x1miQ/60/i8Yd yezmdwhm4o0kpfAA== Received: from adalid.arch.suse.de (adalid.arch.suse.de [10.161.8.13]) by relay2.suse.de (Postfix) with ESMTP id ED4E12C15C; Thu, 23 Jun 2022 06:17:35 +0000 (UTC) Received: by adalid.arch.suse.de (Postfix, from userid 16045) id 390BB5194D7A; Thu, 23 Jun 2022 08:17:35 +0200 (CEST) From: Hannes Reinecke To: Christoph Hellwig Cc: Sagi Grimberg , Keith Busch , linux-nvme@lists.infradead.org, Hannes Reinecke Subject: [PATCH 09/11] nvmet: Implement basic In-Band Authentication Date: Thu, 23 Jun 2022 08:17:28 +0200 Message-Id: <20220623061730.51490-10-hare@suse.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20220623061730.51490-1-hare@suse.de> References: <20220623061730.51490-1-hare@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220622_231744_384596_84C71ECD X-CRM114-Status: GOOD ( 25.71 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org Implement NVMe-oF In-Band authentication according to NVMe TPAR 8006. This patch adds three additional configfs entries 'dhchap_key', 'dhchap_ctrl_key', and 'dhchap_hash' to the 'host' configfs directory. The 'dhchap_key' and 'dhchap_ctrl_key' entries need to be in the ASCII format as specified in NVMe Base Specification v2.0 section 8.13.5.8 'Secret representation'. 'dhchap_hash' defaults to 'hmac(sha256)', and can be written to to switch to a different HMAC algorithm. Signed-off-by: Hannes Reinecke Reviewed-by: Sagi Grimberg --- drivers/nvme/target/Kconfig | 13 + drivers/nvme/target/Makefile | 1 + drivers/nvme/target/admin-cmd.c | 2 + drivers/nvme/target/auth.c | 367 ++++++++++++++++++ drivers/nvme/target/configfs.c | 107 +++++- drivers/nvme/target/core.c | 11 + drivers/nvme/target/fabrics-cmd-auth.c | 502 +++++++++++++++++++++++++ drivers/nvme/target/fabrics-cmd.c | 38 +- drivers/nvme/target/nvmet.h | 62 +++ 9 files changed, 1100 insertions(+), 3 deletions(-) create mode 100644 drivers/nvme/target/auth.c create mode 100644 drivers/nvme/target/fabrics-cmd-auth.c diff --git a/drivers/nvme/target/Kconfig b/drivers/nvme/target/Kconfig index 973561c93888..df526b59b509 100644 --- a/drivers/nvme/target/Kconfig +++ b/drivers/nvme/target/Kconfig @@ -83,3 +83,16 @@ config NVME_TARGET_TCP devices over TCP. If unsure, say N. + +config NVME_TARGET_AUTH + bool "NVMe over Fabrics In-band Authentication support" + depends on NVME_TARGET + select NVME_COMMON + select CRYPTO + select CRYPTO_HMAC + select CRYPTO_SHA256 + select CRYPTO_SHA512 + help + This enables support for NVMe over Fabrics In-band Authentication + + If unsure, say N. diff --git a/drivers/nvme/target/Makefile b/drivers/nvme/target/Makefile index 9837e580fa7e..c66820102493 100644 --- a/drivers/nvme/target/Makefile +++ b/drivers/nvme/target/Makefile @@ -13,6 +13,7 @@ nvmet-y += core.o configfs.o admin-cmd.o fabrics-cmd.o \ discovery.o io-cmd-file.o io-cmd-bdev.o nvmet-$(CONFIG_NVME_TARGET_PASSTHRU) += passthru.o nvmet-$(CONFIG_BLK_DEV_ZONED) += zns.o +nvmet-$(CONFIG_NVME_TARGET_AUTH) += fabrics-cmd-auth.o auth.o nvme-loop-y += loop.o nvmet-rdma-y += rdma.o nvmet-fc-y += fc.o diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c index 31df40ac828f..fc8a957fad0a 100644 --- a/drivers/nvme/target/admin-cmd.c +++ b/drivers/nvme/target/admin-cmd.c @@ -1018,6 +1018,8 @@ u16 nvmet_parse_admin_cmd(struct nvmet_req *req) if (nvme_is_fabrics(cmd)) return nvmet_parse_fabrics_admin_cmd(req); + if (unlikely(!nvmet_check_auth_status(req))) + return NVME_SC_AUTH_REQUIRED | NVME_SC_DNR; if (nvmet_is_disc_subsys(nvmet_req_subsys(req))) return nvmet_parse_discovery_cmd(req); diff --git a/drivers/nvme/target/auth.c b/drivers/nvme/target/auth.c new file mode 100644 index 000000000000..5cdd23c34185 --- /dev/null +++ b/drivers/nvme/target/auth.c @@ -0,0 +1,367 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * NVMe over Fabrics DH-HMAC-CHAP authentication. + * Copyright (c) 2020 Hannes Reinecke, SUSE Software Solutions. + * All rights reserved. + */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "nvmet.h" + +int nvmet_auth_set_key(struct nvmet_host *host, const char *secret, + bool set_ctrl) +{ + unsigned char key_hash; + char *dhchap_secret; + + if (sscanf(secret, "DHHC-1:%hhd:%*s", &key_hash) != 1) + return -EINVAL; + if (key_hash > 3) { + pr_warn("Invalid DH-HMAC-CHAP hash id %d\n", + key_hash); + return -EINVAL; + } + if (key_hash > 0) { + /* Validate selected hash algorithm */ + const char *hmac = nvme_auth_hmac_name(key_hash); + + if (!crypto_has_shash(hmac, 0, 0)) { + pr_err("DH-HMAC-CHAP hash %s unsupported\n", hmac); + return -ENOTSUPP; + } + } + dhchap_secret = kstrdup(secret, GFP_KERNEL); + if (!dhchap_secret) + return -ENOMEM; + if (set_ctrl) { + host->dhchap_ctrl_secret = strim(dhchap_secret); + host->dhchap_ctrl_key_hash = key_hash; + } else { + host->dhchap_secret = strim(dhchap_secret); + host->dhchap_key_hash = key_hash; + } + return 0; +} + +int nvmet_setup_auth(struct nvmet_ctrl *ctrl) +{ + int ret = 0; + struct nvmet_host_link *p; + struct nvmet_host *host = NULL; + const char *hash_name; + + down_read(&nvmet_config_sem); + if (nvmet_is_disc_subsys(ctrl->subsys)) + goto out_unlock; + + if (ctrl->subsys->allow_any_host) + goto out_unlock; + + list_for_each_entry(p, &ctrl->subsys->hosts, entry) { + pr_debug("check %s\n", nvmet_host_name(p->host)); + if (strcmp(nvmet_host_name(p->host), ctrl->hostnqn)) + continue; + host = p->host; + break; + } + if (!host) { + pr_debug("host %s not found\n", ctrl->hostnqn); + ret = -EPERM; + goto out_unlock; + } + + if (!host->dhchap_secret) { + pr_debug("No authentication provided\n"); + goto out_unlock; + } + + if (host->dhchap_hash_id == ctrl->shash_id) { + pr_debug("Re-use existing hash ID %d\n", + ctrl->shash_id); + } else { + hash_name = nvme_auth_hmac_name(host->dhchap_hash_id); + if (!hash_name) { + pr_warn("Hash ID %d invalid\n", host->dhchap_hash_id); + ret = -EINVAL; + goto out_unlock; + } + ctrl->shash_id = host->dhchap_hash_id; + } + + /* Skip the 'DHHC-1:XX:' prefix */ + nvme_auth_free_key(ctrl->host_key); + ctrl->host_key = nvme_auth_extract_key(host->dhchap_secret + 10, + host->dhchap_key_hash); + if (IS_ERR(ctrl->host_key)) { + ret = PTR_ERR(ctrl->host_key); + ctrl->host_key = NULL; + goto out_free_hash; + } + pr_debug("%s: using hash %s key %*ph\n", __func__, + ctrl->host_key->hash > 0 ? + nvme_auth_hmac_name(ctrl->host_key->hash) : "none", + (int)ctrl->host_key->len, ctrl->host_key->key); + + nvme_auth_free_key(ctrl->ctrl_key); + if (!host->dhchap_ctrl_secret) { + ctrl->ctrl_key = NULL; + goto out_unlock; + } + + ctrl->ctrl_key = nvme_auth_extract_key(host->dhchap_ctrl_secret + 10, + host->dhchap_ctrl_key_hash); + if (IS_ERR(ctrl->ctrl_key)) { + ret = PTR_ERR(ctrl->ctrl_key); + ctrl->ctrl_key = NULL; + } + pr_debug("%s: using ctrl hash %s key %*ph\n", __func__, + ctrl->ctrl_key->hash > 0 ? + nvme_auth_hmac_name(ctrl->ctrl_key->hash) : "none", + (int)ctrl->ctrl_key->len, ctrl->ctrl_key->key); + +out_free_hash: + if (ret) { + if (ctrl->host_key) { + nvme_auth_free_key(ctrl->host_key); + ctrl->host_key = NULL; + } + ctrl->shash_id = 0; + } +out_unlock: + up_read(&nvmet_config_sem); + + return ret; +} + +void nvmet_auth_sq_free(struct nvmet_sq *sq) +{ + kfree(sq->dhchap_c1); + sq->dhchap_c1 = NULL; + kfree(sq->dhchap_c2); + sq->dhchap_c2 = NULL; + kfree(sq->dhchap_skey); + sq->dhchap_skey = NULL; +} + +void nvmet_destroy_auth(struct nvmet_ctrl *ctrl) +{ + ctrl->shash_id = 0; + + if (ctrl->host_key) { + nvme_auth_free_key(ctrl->host_key); + ctrl->host_key = NULL; + } + if (ctrl->ctrl_key) { + nvme_auth_free_key(ctrl->ctrl_key); + ctrl->ctrl_key = NULL; + } +} + +bool nvmet_check_auth_status(struct nvmet_req *req) +{ + if (req->sq->ctrl->host_key && + !req->sq->authenticated) + return false; + return true; +} + +int nvmet_auth_host_hash(struct nvmet_req *req, u8 *response, + unsigned int shash_len) +{ + struct crypto_shash *shash_tfm; + struct shash_desc *shash; + struct nvmet_ctrl *ctrl = req->sq->ctrl; + const char *hash_name; + u8 *challenge = req->sq->dhchap_c1, *host_response; + u8 buf[4]; + int ret; + + hash_name = nvme_auth_hmac_name(ctrl->shash_id); + if (!hash_name) { + pr_warn("Hash ID %d invalid\n", ctrl->shash_id); + return -EINVAL; + } + + shash_tfm = crypto_alloc_shash(hash_name, 0, 0); + if (IS_ERR(shash_tfm)) { + pr_err("failed to allocate shash %s\n", hash_name); + return PTR_ERR(shash_tfm); + } + + if (shash_len != crypto_shash_digestsize(shash_tfm)) { + pr_debug("%s: hash len mismatch (len %d digest %d)\n", + __func__, shash_len, + crypto_shash_digestsize(shash_tfm)); + ret = -EINVAL; + goto out_free_tfm; + } + + host_response = nvme_auth_transform_key(ctrl->host_key, ctrl->hostnqn); + if (IS_ERR(host_response)) { + ret = PTR_ERR(host_response); + goto out_free_tfm; + } + + ret = crypto_shash_setkey(shash_tfm, host_response, + ctrl->host_key->len); + if (ret) + goto out_free_response; + + pr_debug("ctrl %d qid %d host response seq %u transaction %d\n", + ctrl->cntlid, req->sq->qid, req->sq->dhchap_s1, + req->sq->dhchap_tid); + + shash = kzalloc(sizeof(*shash) + crypto_shash_descsize(shash_tfm), + GFP_KERNEL); + if (!shash) { + ret = -ENOMEM; + goto out_free_response; + } + shash->tfm = shash_tfm; + ret = crypto_shash_init(shash); + if (ret) + goto out; + ret = crypto_shash_update(shash, challenge, shash_len); + if (ret) + goto out; + put_unaligned_le32(req->sq->dhchap_s1, buf); + ret = crypto_shash_update(shash, buf, 4); + if (ret) + goto out; + put_unaligned_le16(req->sq->dhchap_tid, buf); + ret = crypto_shash_update(shash, buf, 2); + if (ret) + goto out; + memset(buf, 0, 4); + ret = crypto_shash_update(shash, buf, 1); + if (ret) + goto out; + ret = crypto_shash_update(shash, "HostHost", 8); + if (ret) + goto out; + ret = crypto_shash_update(shash, ctrl->hostnqn, strlen(ctrl->hostnqn)); + if (ret) + goto out; + ret = crypto_shash_update(shash, buf, 1); + if (ret) + goto out; + ret = crypto_shash_update(shash, ctrl->subsysnqn, + strlen(ctrl->subsysnqn)); + if (ret) + goto out; + ret = crypto_shash_final(shash, response); +out: + if (challenge != req->sq->dhchap_c1) + kfree(challenge); + kfree(shash); +out_free_response: + kfree_sensitive(host_response); +out_free_tfm: + crypto_free_shash(shash_tfm); + return 0; +} + +int nvmet_auth_ctrl_hash(struct nvmet_req *req, u8 *response, + unsigned int shash_len) +{ + struct crypto_shash *shash_tfm; + struct shash_desc *shash; + struct nvmet_ctrl *ctrl = req->sq->ctrl; + const char *hash_name; + u8 *challenge = req->sq->dhchap_c2, *ctrl_response; + u8 buf[4]; + int ret; + + hash_name = nvme_auth_hmac_name(ctrl->shash_id); + if (!hash_name) { + pr_warn("Hash ID %d invalid\n", ctrl->shash_id); + return -EINVAL; + } + + shash_tfm = crypto_alloc_shash(hash_name, 0, 0); + if (IS_ERR(shash_tfm)) { + pr_err("failed to allocate shash %s\n", hash_name); + return PTR_ERR(shash_tfm); + } + + if (shash_len != crypto_shash_digestsize(shash_tfm)) { + pr_debug("%s: hash len mismatch (len %d digest %d)\n", + __func__, shash_len, + crypto_shash_digestsize(shash_tfm)); + ret = -EINVAL; + goto out_free_tfm; + } + + ctrl_response = nvme_auth_transform_key(ctrl->ctrl_key, + ctrl->subsysnqn); + if (IS_ERR(ctrl_response)) { + ret = PTR_ERR(ctrl_response); + goto out_free_tfm; + } + + ret = crypto_shash_setkey(shash_tfm, ctrl_response, + ctrl->ctrl_key->len); + if (ret) + goto out_free_response; + + shash = kzalloc(sizeof(*shash) + crypto_shash_descsize(shash_tfm), + GFP_KERNEL); + if (!shash) { + ret = -ENOMEM; + goto out_free_response; + } + shash->tfm = shash_tfm; + + ret = crypto_shash_init(shash); + if (ret) + goto out; + ret = crypto_shash_update(shash, challenge, shash_len); + if (ret) + goto out; + put_unaligned_le32(req->sq->dhchap_s2, buf); + ret = crypto_shash_update(shash, buf, 4); + if (ret) + goto out; + put_unaligned_le16(req->sq->dhchap_tid, buf); + ret = crypto_shash_update(shash, buf, 2); + if (ret) + goto out; + memset(buf, 0, 4); + ret = crypto_shash_update(shash, buf, 1); + if (ret) + goto out; + ret = crypto_shash_update(shash, "Controller", 10); + if (ret) + goto out; + ret = crypto_shash_update(shash, ctrl->subsysnqn, + strlen(ctrl->subsysnqn)); + if (ret) + goto out; + ret = crypto_shash_update(shash, buf, 1); + if (ret) + goto out; + ret = crypto_shash_update(shash, ctrl->hostnqn, strlen(ctrl->hostnqn)); + if (ret) + goto out; + ret = crypto_shash_final(shash, response); +out: + if (challenge != req->sq->dhchap_c2) + kfree(challenge); + kfree(shash); +out_free_response: + kfree_sensitive(ctrl_response); +out_free_tfm: + crypto_free_shash(shash_tfm); + return 0; +} diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c index e44b2988759e..9a7d91c64fcd 100644 --- a/drivers/nvme/target/configfs.c +++ b/drivers/nvme/target/configfs.c @@ -11,6 +11,11 @@ #include #include #include +#ifdef CONFIG_NVME_TARGET_AUTH +#include +#endif +#include +#include #include "nvmet.h" @@ -1660,10 +1665,102 @@ static const struct config_item_type nvmet_ports_type = { static struct config_group nvmet_subsystems_group; static struct config_group nvmet_ports_group; -static void nvmet_host_release(struct config_item *item) +#ifdef CONFIG_NVME_TARGET_AUTH +static ssize_t nvmet_host_dhchap_key_show(struct config_item *item, + char *page) +{ + u8 *dhchap_secret = to_host(item)->dhchap_secret; + + if (!dhchap_secret) + return sprintf(page, "\n"); + return sprintf(page, "%s\n", dhchap_secret); +} + +static ssize_t nvmet_host_dhchap_key_store(struct config_item *item, + const char *page, size_t count) +{ + struct nvmet_host *host = to_host(item); + int ret; + + ret = nvmet_auth_set_key(host, page, false); + /* + * Re-authentication is a soft state, so keep the + * current authentication valid until the host + * requests re-authentication. + */ + return ret < 0 ? ret : count; +} + +CONFIGFS_ATTR(nvmet_host_, dhchap_key); + +static ssize_t nvmet_host_dhchap_ctrl_key_show(struct config_item *item, + char *page) +{ + u8 *dhchap_secret = to_host(item)->dhchap_ctrl_secret; + + if (!dhchap_secret) + return sprintf(page, "\n"); + return sprintf(page, "%s\n", dhchap_secret); +} + +static ssize_t nvmet_host_dhchap_ctrl_key_store(struct config_item *item, + const char *page, size_t count) +{ + struct nvmet_host *host = to_host(item); + int ret; + + ret = nvmet_auth_set_key(host, page, true); + /* + * Re-authentication is a soft state, so keep the + * current authentication valid until the host + * requests re-authentication. + */ + return ret < 0 ? ret : count; +} + +CONFIGFS_ATTR(nvmet_host_, dhchap_ctrl_key); + +static ssize_t nvmet_host_dhchap_hash_show(struct config_item *item, + char *page) { struct nvmet_host *host = to_host(item); + const char *hash_name = nvme_auth_hmac_name(host->dhchap_hash_id); + return sprintf(page, "%s\n", hash_name ? hash_name : "none"); +} + +static ssize_t nvmet_host_dhchap_hash_store(struct config_item *item, + const char *page, size_t count) +{ + struct nvmet_host *host = to_host(item); + u8 hmac_id; + + hmac_id = nvme_auth_hmac_id(page); + if (hmac_id == NVME_AUTH_HASH_INVALID) + return -EINVAL; + if (!crypto_has_shash(nvme_auth_hmac_name(hmac_id), 0, 0)) + return -ENOTSUPP; + host->dhchap_hash_id = hmac_id; + return count; +} + +CONFIGFS_ATTR(nvmet_host_, dhchap_hash); + +static struct configfs_attribute *nvmet_host_attrs[] = { + &nvmet_host_attr_dhchap_key, + &nvmet_host_attr_dhchap_ctrl_key, + &nvmet_host_attr_dhchap_hash, + NULL, +}; +#endif /* CONFIG_NVME_TARGET_AUTH */ + +static void nvmet_host_release(struct config_item *item) +{ + struct nvmet_host *host = to_host(item); +#ifdef CONFIG_NVME_TARGET_AUTH + if (host->dhchap_secret) + kfree(host->dhchap_secret); +#endif kfree(host); } @@ -1673,6 +1770,9 @@ static struct configfs_item_operations nvmet_host_item_ops = { static const struct config_item_type nvmet_host_type = { .ct_item_ops = &nvmet_host_item_ops, +#ifdef CONFIG_NVME_TARGET_AUTH + .ct_attrs = nvmet_host_attrs, +#endif .ct_owner = THIS_MODULE, }; @@ -1685,6 +1785,11 @@ static struct config_group *nvmet_hosts_make_group(struct config_group *group, if (!host) return ERR_PTR(-ENOMEM); +#ifdef CONFIG_NVME_TARGET_AUTH + /* Default to SHA256 */ + host->dhchap_hash_id = NVME_AUTH_HASH_SHA256; +#endif + config_group_init_type_name(&host->group, name, &nvmet_host_type); return &host->group; diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c index 792f15621173..eec0351e1022 100644 --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -795,6 +795,7 @@ void nvmet_sq_destroy(struct nvmet_sq *sq) wait_for_completion(&sq->confirm_done); wait_for_completion(&sq->free_done); percpu_ref_exit(&sq->ref); + nvmet_auth_sq_free(sq); if (ctrl) { /* @@ -871,6 +872,9 @@ static u16 nvmet_parse_io_cmd(struct nvmet_req *req) if (nvme_is_fabrics(cmd)) return nvmet_parse_fabrics_io_cmd(req); + if (unlikely(!nvmet_check_auth_status(req))) + return NVME_SC_AUTH_REQUIRED | NVME_SC_DNR; + ret = nvmet_check_ctrl_status(req); if (unlikely(ret)) return ret; @@ -1275,6 +1279,11 @@ u16 nvmet_check_ctrl_status(struct nvmet_req *req) req->cmd->common.opcode, req->sq->qid); return NVME_SC_CMD_SEQ_ERROR | NVME_SC_DNR; } + + if (unlikely(!nvmet_check_auth_status(req))) { + pr_warn("qid %d not authenticated\n", req->sq->qid); + return NVME_SC_AUTH_REQUIRED | NVME_SC_DNR; + } return 0; } @@ -1465,6 +1474,8 @@ static void nvmet_ctrl_free(struct kref *ref) flush_work(&ctrl->async_event_work); cancel_work_sync(&ctrl->fatal_err_work); + nvmet_destroy_auth(ctrl); + ida_free(&cntlid_ida, ctrl->cntlid); nvmet_async_events_free(ctrl); diff --git a/drivers/nvme/target/fabrics-cmd-auth.c b/drivers/nvme/target/fabrics-cmd-auth.c new file mode 100644 index 000000000000..776073a10e04 --- /dev/null +++ b/drivers/nvme/target/fabrics-cmd-auth.c @@ -0,0 +1,502 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * NVMe over Fabrics DH-HMAC-CHAP authentication command handling. + * Copyright (c) 2020 Hannes Reinecke, SUSE Software Solutions. + * All rights reserved. + */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include +#include +#include +#include +#include +#include "nvmet.h" + +void nvmet_init_auth(struct nvmet_ctrl *ctrl, struct nvmet_req *req) +{ + u32 result = le32_to_cpu(req->cqe->result.u32); + + /* Initialize in-band authentication */ + req->sq->authenticated = false; + req->sq->dhchap_step = NVME_AUTH_DHCHAP_MESSAGE_NEGOTIATE; + result |= (u32)NVME_CONNECT_AUTHREQ_ATR << 16; + req->cqe->result.u32 = cpu_to_le32(result); +} + +static u16 nvmet_auth_negotiate(struct nvmet_req *req, void *d) +{ + struct nvmet_ctrl *ctrl = req->sq->ctrl; + struct nvmf_auth_dhchap_negotiate_data *data = d; + int i, hash_id = 0, fallback_hash_id = 0, dhgid; + + pr_debug("%s: ctrl %d qid %d: data sc_d %d napd %d authid %d halen %d dhlen %d\n", + __func__, ctrl->cntlid, req->sq->qid, + data->sc_c, data->napd, data->auth_protocol[0].dhchap.authid, + data->auth_protocol[0].dhchap.halen, + data->auth_protocol[0].dhchap.dhlen); + req->sq->dhchap_tid = le16_to_cpu(data->t_id); + if (data->sc_c) + return NVME_AUTH_DHCHAP_FAILURE_CONCAT_MISMATCH; + + if (data->napd != 1) + return NVME_AUTH_DHCHAP_FAILURE_HASH_UNUSABLE; + + if (data->auth_protocol[0].dhchap.authid != + NVME_AUTH_DHCHAP_AUTH_ID) + return NVME_AUTH_DHCHAP_FAILURE_INCORRECT_PAYLOAD; + + for (i = 0; i < data->auth_protocol[0].dhchap.halen; i++) { + u8 host_hmac_id = data->auth_protocol[0].dhchap.idlist[i]; + + if (!fallback_hash_id && + crypto_has_shash(nvme_auth_hmac_name(host_hmac_id), 0, 0)) + fallback_hash_id = host_hmac_id; + if (ctrl->shash_id != host_hmac_id) + continue; + hash_id = ctrl->shash_id; + break; + } + if (hash_id == 0) { + if (fallback_hash_id == 0) { + pr_debug("%s: ctrl %d qid %d: no usable hash found\n", + __func__, ctrl->cntlid, req->sq->qid); + return NVME_AUTH_DHCHAP_FAILURE_HASH_UNUSABLE; + } + pr_debug("%s: ctrl %d qid %d: no usable hash found, falling back to %s\n", + __func__, ctrl->cntlid, req->sq->qid, + nvme_auth_hmac_name(fallback_hash_id)); + ctrl->shash_id = fallback_hash_id; + } + + dhgid = -1; + for (i = 0; i < data->auth_protocol[0].dhchap.dhlen; i++) { + int tmp_dhgid = data->auth_protocol[0].dhchap.idlist[i + 30]; + + if (tmp_dhgid == NVME_AUTH_DHGROUP_NULL) { + dhgid = tmp_dhgid; + break; + } + } + if (dhgid < 0) { + pr_debug("%s: ctrl %d qid %d: no usable DH group found\n", + __func__, ctrl->cntlid, req->sq->qid); + return NVME_AUTH_DHCHAP_FAILURE_DHGROUP_UNUSABLE; + } + pr_debug("%s: ctrl %d qid %d: selected DH group %s (%d)\n", + __func__, ctrl->cntlid, req->sq->qid, + nvme_auth_dhgroup_name(dhgid), dhgid); + return 0; +} + +static u16 nvmet_auth_reply(struct nvmet_req *req, void *d) +{ + struct nvmet_ctrl *ctrl = req->sq->ctrl; + struct nvmf_auth_dhchap_reply_data *data = d; + u16 dhvlen = le16_to_cpu(data->dhvlen); + u8 *response; + + pr_debug("%s: ctrl %d qid %d: data hl %d cvalid %d dhvlen %u\n", + __func__, ctrl->cntlid, req->sq->qid, + data->hl, data->cvalid, dhvlen); + + if (dhvlen) { + return NVME_AUTH_DHCHAP_FAILURE_INCORRECT_PAYLOAD; + } + + response = kmalloc(data->hl, GFP_KERNEL); + if (!response) + return NVME_AUTH_DHCHAP_FAILURE_FAILED; + + if (!ctrl->host_key) { + pr_warn("ctrl %d qid %d no host key\n", + ctrl->cntlid, req->sq->qid); + kfree(response); + return NVME_AUTH_DHCHAP_FAILURE_FAILED; + } + if (nvmet_auth_host_hash(req, response, data->hl) < 0) { + pr_debug("ctrl %d qid %d host hash failed\n", + ctrl->cntlid, req->sq->qid); + kfree(response); + return NVME_AUTH_DHCHAP_FAILURE_FAILED; + } + + if (memcmp(data->rval, response, data->hl)) { + pr_info("ctrl %d qid %d host response mismatch\n", + ctrl->cntlid, req->sq->qid); + kfree(response); + return NVME_AUTH_DHCHAP_FAILURE_FAILED; + } + kfree(response); + pr_debug("%s: ctrl %d qid %d host authenticated\n", + __func__, ctrl->cntlid, req->sq->qid); + if (data->cvalid) { + req->sq->dhchap_c2 = kmalloc(data->hl, GFP_KERNEL); + if (!req->sq->dhchap_c2) + return NVME_AUTH_DHCHAP_FAILURE_FAILED; + memcpy(req->sq->dhchap_c2, data->rval + data->hl, data->hl); + + pr_debug("%s: ctrl %d qid %d challenge %*ph\n", + __func__, ctrl->cntlid, req->sq->qid, data->hl, + req->sq->dhchap_c2); + req->sq->dhchap_s2 = le32_to_cpu(data->seqnum); + } else { + req->sq->authenticated = true; + req->sq->dhchap_c2 = NULL; + } + + return 0; +} + +static u16 nvmet_auth_failure2(struct nvmet_req *req, void *d) +{ + struct nvmf_auth_dhchap_failure_data *data = d; + + return data->rescode_exp; +} + +void nvmet_execute_auth_send(struct nvmet_req *req) +{ + struct nvmet_ctrl *ctrl = req->sq->ctrl; + struct nvmf_auth_dhchap_success2_data *data; + void *d; + u32 tl; + u16 status = 0; + + if (req->cmd->auth_send.secp != NVME_AUTH_DHCHAP_PROTOCOL_IDENTIFIER) { + status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; + req->error_loc = + offsetof(struct nvmf_auth_send_command, secp); + goto done; + } + if (req->cmd->auth_send.spsp0 != 0x01) { + status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; + req->error_loc = + offsetof(struct nvmf_auth_send_command, spsp0); + goto done; + } + if (req->cmd->auth_send.spsp1 != 0x01) { + status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; + req->error_loc = + offsetof(struct nvmf_auth_send_command, spsp1); + goto done; + } + tl = le32_to_cpu(req->cmd->auth_send.tl); + if (!tl) { + status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; + req->error_loc = + offsetof(struct nvmf_auth_send_command, tl); + goto done; + } + if (!nvmet_check_transfer_len(req, tl)) { + pr_debug("%s: transfer length mismatch (%u)\n", __func__, tl); + return; + } + + d = kmalloc(tl, GFP_KERNEL); + if (!d) { + status = NVME_SC_INTERNAL; + goto done; + } + + status = nvmet_copy_from_sgl(req, 0, d, tl); + if (status) { + kfree(d); + goto done; + } + + data = d; + pr_debug("%s: ctrl %d qid %d type %d id %d step %x\n", __func__, + ctrl->cntlid, req->sq->qid, data->auth_type, data->auth_id, + req->sq->dhchap_step); + if (data->auth_type != NVME_AUTH_COMMON_MESSAGES && + data->auth_type != NVME_AUTH_DHCHAP_MESSAGES) + goto done_failure1; + if (data->auth_type == NVME_AUTH_COMMON_MESSAGES) { + if (data->auth_id == NVME_AUTH_DHCHAP_MESSAGE_NEGOTIATE) { + /* Restart negotiation */ + pr_debug("%s: ctrl %d qid %d reset negotiation\n", __func__, + ctrl->cntlid, req->sq->qid); + if (!req->sq->qid) { + status = nvmet_setup_auth(ctrl); + if (status < 0) { + pr_err("ctrl %d qid 0 failed to setup" + "re-authentication", + ctrl->cntlid); + goto done_failure1; + } + } + req->sq->dhchap_step = NVME_AUTH_DHCHAP_MESSAGE_NEGOTIATE; + } else if (data->auth_id != req->sq->dhchap_step) + goto done_failure1; + /* Validate negotiation parameters */ + status = nvmet_auth_negotiate(req, d); + if (status == 0) + req->sq->dhchap_step = + NVME_AUTH_DHCHAP_MESSAGE_CHALLENGE; + else { + req->sq->dhchap_step = + NVME_AUTH_DHCHAP_MESSAGE_FAILURE1; + req->sq->dhchap_status = status; + status = 0; + } + goto done_kfree; + } + if (data->auth_id != req->sq->dhchap_step) { + pr_debug("%s: ctrl %d qid %d step mismatch (%d != %d)\n", + __func__, ctrl->cntlid, req->sq->qid, + data->auth_id, req->sq->dhchap_step); + goto done_failure1; + } + if (le16_to_cpu(data->t_id) != req->sq->dhchap_tid) { + pr_debug("%s: ctrl %d qid %d invalid transaction %d (expected %d)\n", + __func__, ctrl->cntlid, req->sq->qid, + le16_to_cpu(data->t_id), + req->sq->dhchap_tid); + req->sq->dhchap_step = + NVME_AUTH_DHCHAP_MESSAGE_FAILURE1; + req->sq->dhchap_status = + NVME_AUTH_DHCHAP_FAILURE_INCORRECT_PAYLOAD; + goto done_kfree; + } + + switch (data->auth_id) { + case NVME_AUTH_DHCHAP_MESSAGE_REPLY: + status = nvmet_auth_reply(req, d); + if (status == 0) + req->sq->dhchap_step = + NVME_AUTH_DHCHAP_MESSAGE_SUCCESS1; + else { + req->sq->dhchap_step = + NVME_AUTH_DHCHAP_MESSAGE_FAILURE1; + req->sq->dhchap_status = status; + status = 0; + } + goto done_kfree; + break; + case NVME_AUTH_DHCHAP_MESSAGE_SUCCESS2: + req->sq->authenticated = true; + pr_debug("%s: ctrl %d qid %d ctrl authenticated\n", + __func__, ctrl->cntlid, req->sq->qid); + goto done_kfree; + break; + case NVME_AUTH_DHCHAP_MESSAGE_FAILURE2: + status = nvmet_auth_failure2(req, d); + if (status) { + pr_warn("ctrl %d qid %d: authentication failed (%d)\n", + ctrl->cntlid, req->sq->qid, status); + req->sq->dhchap_status = status; + req->sq->authenticated = false; + status = 0; + } + goto done_kfree; + break; + default: + req->sq->dhchap_status = + NVME_AUTH_DHCHAP_FAILURE_INCORRECT_MESSAGE; + req->sq->dhchap_step = + NVME_AUTH_DHCHAP_MESSAGE_FAILURE2; + req->sq->authenticated = false; + goto done_kfree; + break; + } +done_failure1: + req->sq->dhchap_status = NVME_AUTH_DHCHAP_FAILURE_INCORRECT_MESSAGE; + req->sq->dhchap_step = NVME_AUTH_DHCHAP_MESSAGE_FAILURE2; + +done_kfree: + kfree(d); +done: + pr_debug("%s: ctrl %d qid %d dhchap status %x step %x\n", __func__, + ctrl->cntlid, req->sq->qid, + req->sq->dhchap_status, req->sq->dhchap_step); + if (status) + pr_debug("%s: ctrl %d qid %d nvme status %x error loc %d\n", + __func__, ctrl->cntlid, req->sq->qid, + status, req->error_loc); + req->cqe->result.u64 = 0; + nvmet_req_complete(req, status); + if (req->sq->dhchap_step != NVME_AUTH_DHCHAP_MESSAGE_SUCCESS2 && + req->sq->dhchap_step != NVME_AUTH_DHCHAP_MESSAGE_FAILURE2) + return; + /* Final states, clear up variables */ + nvmet_auth_sq_free(req->sq); + if (req->sq->dhchap_step == NVME_AUTH_DHCHAP_MESSAGE_FAILURE2) + nvmet_ctrl_fatal_error(ctrl); +} + +static int nvmet_auth_challenge(struct nvmet_req *req, void *d, int al) +{ + struct nvmf_auth_dhchap_challenge_data *data = d; + struct nvmet_ctrl *ctrl = req->sq->ctrl; + int ret = 0; + int hash_len = nvme_auth_hmac_hash_len(ctrl->shash_id); + int data_size = sizeof(*d) + hash_len; + + if (al < data_size) { + pr_debug("%s: buffer too small (al %d need %d)\n", __func__, + al, data_size); + return -EINVAL; + } + memset(data, 0, data_size); + req->sq->dhchap_s1 = nvme_auth_get_seqnum(); + data->auth_type = NVME_AUTH_DHCHAP_MESSAGES; + data->auth_id = NVME_AUTH_DHCHAP_MESSAGE_CHALLENGE; + data->t_id = cpu_to_le16(req->sq->dhchap_tid); + data->hashid = ctrl->shash_id; + data->hl = hash_len; + data->seqnum = cpu_to_le32(req->sq->dhchap_s1); + req->sq->dhchap_c1 = kmalloc(data->hl, GFP_KERNEL); + if (!req->sq->dhchap_c1) + return -ENOMEM; + get_random_bytes(req->sq->dhchap_c1, data->hl); + memcpy(data->cval, req->sq->dhchap_c1, data->hl); + pr_debug("%s: ctrl %d qid %d seq %u transaction %d hl %d dhvlen %u\n", + __func__, ctrl->cntlid, req->sq->qid, req->sq->dhchap_s1, + req->sq->dhchap_tid, data->hl, 0); + return ret; +} + +static int nvmet_auth_success1(struct nvmet_req *req, void *d, int al) +{ + struct nvmf_auth_dhchap_success1_data *data = d; + struct nvmet_ctrl *ctrl = req->sq->ctrl; + int hash_len = nvme_auth_hmac_hash_len(ctrl->shash_id); + + WARN_ON(al < sizeof(*data)); + memset(data, 0, sizeof(*data)); + data->auth_type = NVME_AUTH_DHCHAP_MESSAGES; + data->auth_id = NVME_AUTH_DHCHAP_MESSAGE_SUCCESS1; + data->t_id = cpu_to_le16(req->sq->dhchap_tid); + data->hl = hash_len; + if (req->sq->dhchap_c2) { + if (!ctrl->ctrl_key) { + pr_warn("ctrl %d qid %d no ctrl key\n", + ctrl->cntlid, req->sq->qid); + return NVME_AUTH_DHCHAP_FAILURE_FAILED; + } + if (nvmet_auth_ctrl_hash(req, data->rval, data->hl)) + return NVME_AUTH_DHCHAP_FAILURE_HASH_UNUSABLE; + data->rvalid = 1; + pr_debug("ctrl %d qid %d response %*ph\n", + ctrl->cntlid, req->sq->qid, data->hl, data->rval); + } + return 0; +} + +static void nvmet_auth_failure1(struct nvmet_req *req, void *d, int al) +{ + struct nvmf_auth_dhchap_failure_data *data = d; + + WARN_ON(al < sizeof(*data)); + data->auth_type = NVME_AUTH_COMMON_MESSAGES; + data->auth_id = NVME_AUTH_DHCHAP_MESSAGE_FAILURE1; + data->t_id = cpu_to_le16(req->sq->dhchap_tid); + data->rescode = NVME_AUTH_DHCHAP_FAILURE_REASON_FAILED; + data->rescode_exp = req->sq->dhchap_status; +} + +void nvmet_execute_auth_receive(struct nvmet_req *req) +{ + struct nvmet_ctrl *ctrl = req->sq->ctrl; + void *d; + u32 al; + u16 status = 0; + + if (req->cmd->auth_receive.secp != NVME_AUTH_DHCHAP_PROTOCOL_IDENTIFIER) { + status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; + req->error_loc = + offsetof(struct nvmf_auth_receive_command, secp); + goto done; + } + if (req->cmd->auth_receive.spsp0 != 0x01) { + status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; + req->error_loc = + offsetof(struct nvmf_auth_receive_command, spsp0); + goto done; + } + if (req->cmd->auth_receive.spsp1 != 0x01) { + status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; + req->error_loc = + offsetof(struct nvmf_auth_receive_command, spsp1); + goto done; + } + al = le32_to_cpu(req->cmd->auth_receive.al); + if (!al) { + status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; + req->error_loc = + offsetof(struct nvmf_auth_receive_command, al); + goto done; + } + if (!nvmet_check_transfer_len(req, al)) { + pr_debug("%s: transfer length mismatch (%u)\n", __func__, al); + return; + } + + d = kmalloc(al, GFP_KERNEL); + if (!d) { + status = NVME_SC_INTERNAL; + goto done; + } + pr_debug("%s: ctrl %d qid %d step %x\n", __func__, + ctrl->cntlid, req->sq->qid, req->sq->dhchap_step); + switch (req->sq->dhchap_step) { + case NVME_AUTH_DHCHAP_MESSAGE_CHALLENGE: + status = nvmet_auth_challenge(req, d, al); + if (status < 0) { + pr_warn("ctrl %d qid %d: challenge error (%d)\n", + ctrl->cntlid, req->sq->qid, status); + status = NVME_SC_INTERNAL; + break; + } + if (status) { + req->sq->dhchap_status = status; + nvmet_auth_failure1(req, d, al); + pr_warn("ctrl %d qid %d: challenge status (%x)\n", + ctrl->cntlid, req->sq->qid, + req->sq->dhchap_status); + status = 0; + break; + } + req->sq->dhchap_step = NVME_AUTH_DHCHAP_MESSAGE_REPLY; + break; + case NVME_AUTH_DHCHAP_MESSAGE_SUCCESS1: + status = nvmet_auth_success1(req, d, al); + if (status) { + req->sq->dhchap_status = status; + req->sq->authenticated = false; + nvmet_auth_failure1(req, d, al); + pr_warn("ctrl %d qid %d: success1 status (%x)\n", + ctrl->cntlid, req->sq->qid, + req->sq->dhchap_status); + break; + } + req->sq->dhchap_step = NVME_AUTH_DHCHAP_MESSAGE_SUCCESS2; + break; + case NVME_AUTH_DHCHAP_MESSAGE_FAILURE1: + req->sq->authenticated = false; + nvmet_auth_failure1(req, d, al); + pr_warn("ctrl %d qid %d failure1 (%x)\n", + ctrl->cntlid, req->sq->qid, req->sq->dhchap_status); + break; + default: + pr_warn("ctrl %d qid %d unhandled step (%d)\n", + ctrl->cntlid, req->sq->qid, req->sq->dhchap_step); + req->sq->dhchap_step = NVME_AUTH_DHCHAP_MESSAGE_FAILURE1; + req->sq->dhchap_status = NVME_AUTH_DHCHAP_FAILURE_FAILED; + nvmet_auth_failure1(req, d, al); + status = 0; + break; + } + + status = nvmet_copy_to_sgl(req, 0, d, al); + kfree(d); +done: + req->cqe->result.u64 = 0; + nvmet_req_complete(req, status); + if (req->sq->dhchap_step == NVME_AUTH_DHCHAP_MESSAGE_SUCCESS2) + nvmet_auth_sq_free(req->sq); + else if (req->sq->dhchap_step == NVME_AUTH_DHCHAP_MESSAGE_FAILURE1) { + nvmet_auth_sq_free(req->sq); + nvmet_ctrl_fatal_error(ctrl); + } +} diff --git a/drivers/nvme/target/fabrics-cmd.c b/drivers/nvme/target/fabrics-cmd.c index f23c28729908..f91a56180d3d 100644 --- a/drivers/nvme/target/fabrics-cmd.c +++ b/drivers/nvme/target/fabrics-cmd.c @@ -93,6 +93,14 @@ u16 nvmet_parse_fabrics_admin_cmd(struct nvmet_req *req) case nvme_fabrics_type_property_get: req->execute = nvmet_execute_prop_get; break; +#ifdef CONFIG_NVME_TARGET_AUTH + case nvme_fabrics_type_auth_send: + req->execute = nvmet_execute_auth_send; + break; + case nvme_fabrics_type_auth_receive: + req->execute = nvmet_execute_auth_receive; + break; +#endif default: pr_debug("received unknown capsule type 0x%x\n", cmd->fabrics.fctype); @@ -108,6 +116,14 @@ u16 nvmet_parse_fabrics_io_cmd(struct nvmet_req *req) struct nvme_command *cmd = req->cmd; switch (cmd->fabrics.fctype) { +#ifdef CONFIG_NVME_TARGET_AUTH + case nvme_fabrics_type_auth_send: + req->execute = nvmet_execute_auth_send; + break; + case nvme_fabrics_type_auth_receive: + req->execute = nvmet_execute_auth_receive; + break; +#endif default: pr_debug("received unknown capsule type 0x%x\n", cmd->fabrics.fctype); @@ -188,6 +204,7 @@ static void nvmet_execute_admin_connect(struct nvmet_req *req) struct nvmf_connect_data *d; struct nvmet_ctrl *ctrl = NULL; u16 status = 0; + int ret; if (!nvmet_check_transfer_len(req, sizeof(struct nvmf_connect_data))) return; @@ -230,18 +247,32 @@ static void nvmet_execute_admin_connect(struct nvmet_req *req) uuid_copy(&ctrl->hostid, &d->hostid); + ret = nvmet_setup_auth(ctrl); + if (ret < 0) { + pr_err("Failed to setup authentication, error %d\n", ret); + nvmet_ctrl_put(ctrl); + if (ret == -EPERM) + status = (NVME_SC_CONNECT_INVALID_HOST | NVME_SC_DNR); + else + status = NVME_SC_INTERNAL; + goto out; + } + status = nvmet_install_queue(ctrl, req); if (status) { nvmet_ctrl_put(ctrl); goto out; } - pr_info("creating %s controller %d for subsystem %s for NQN %s%s.\n", + pr_info("creating %s controller %d for subsystem %s for NQN %s%s%s.\n", nvmet_is_disc_subsys(ctrl->subsys) ? "discovery" : "nvm", ctrl->cntlid, ctrl->subsys->subsysnqn, ctrl->hostnqn, - ctrl->pi_support ? " T10-PI is enabled" : ""); + ctrl->pi_support ? " T10-PI is enabled" : "", + nvmet_has_auth(ctrl) ? " with DH-HMAC-CHAP" : ""); req->cqe->result.u16 = cpu_to_le16(ctrl->cntlid); + if (nvmet_has_auth(ctrl)) + nvmet_init_auth(ctrl, req); out: kfree(d); complete: @@ -301,6 +332,9 @@ static void nvmet_execute_io_connect(struct nvmet_req *req) req->cqe->result.u16 = cpu_to_le16(ctrl->cntlid); pr_debug("adding queue %d to ctrl %d.\n", qid, ctrl->cntlid); + req->cqe->result.u16 = cpu_to_le16(ctrl->cntlid); + if (nvmet_has_auth(ctrl)) + nvmet_init_auth(ctrl, req); out: kfree(d); diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h index c37f41eafc2f..765db7541a87 100644 --- a/drivers/nvme/target/nvmet.h +++ b/drivers/nvme/target/nvmet.h @@ -108,6 +108,18 @@ struct nvmet_sq { u16 size; u32 sqhd; bool sqhd_disabled; +#ifdef CONFIG_NVME_TARGET_AUTH + bool authenticated; + u16 dhchap_tid; + u16 dhchap_status; + int dhchap_step; + u8 *dhchap_c1; + u8 *dhchap_c2; + u32 dhchap_s1; + u32 dhchap_s2; + u8 *dhchap_skey; + int dhchap_skey_len; +#endif struct completion free_done; struct completion confirm_done; }; @@ -209,6 +221,11 @@ struct nvmet_ctrl { u64 err_counter; struct nvme_error_slot slots[NVMET_ERROR_LOG_SLOTS]; bool pi_support; +#ifdef CONFIG_NVME_TARGET_AUTH + struct nvme_dhchap_key *host_key; + struct nvme_dhchap_key *ctrl_key; + u8 shash_id; +#endif }; struct nvmet_subsys { @@ -270,6 +287,12 @@ static inline struct nvmet_subsys *namespaces_to_subsys( struct nvmet_host { struct config_group group; + u8 *dhchap_secret; + u8 *dhchap_ctrl_secret; + u8 dhchap_key_hash; + u8 dhchap_ctrl_key_hash; + u8 dhchap_hash_id; + u8 dhchap_dhgroup_id; }; static inline struct nvmet_host *to_host(struct config_item *item) @@ -668,4 +691,43 @@ static inline void nvmet_req_bio_put(struct nvmet_req *req, struct bio *bio) bio_put(bio); } +#ifdef CONFIG_NVME_TARGET_AUTH +void nvmet_execute_auth_send(struct nvmet_req *req); +void nvmet_execute_auth_receive(struct nvmet_req *req); +int nvmet_auth_set_key(struct nvmet_host *host, const char *secret, + bool set_ctrl); +int nvmet_auth_set_host_hash(struct nvmet_host *host, const char *hash); +int nvmet_setup_auth(struct nvmet_ctrl *ctrl); +void nvmet_init_auth(struct nvmet_ctrl *ctrl, struct nvmet_req *req); +void nvmet_destroy_auth(struct nvmet_ctrl *ctrl); +void nvmet_auth_sq_free(struct nvmet_sq *sq); +bool nvmet_check_auth_status(struct nvmet_req *req); +int nvmet_auth_host_hash(struct nvmet_req *req, u8 *response, + unsigned int hash_len); +int nvmet_auth_ctrl_hash(struct nvmet_req *req, u8 *response, + unsigned int hash_len); +static inline bool nvmet_has_auth(struct nvmet_ctrl *ctrl) +{ + return ctrl->host_key != NULL; +} +#else +static inline int nvmet_setup_auth(struct nvmet_ctrl *ctrl) +{ + return 0; +} +static inline void nvmet_init_auth(struct nvmet_ctrl *ctrl, + struct nvmet_req *req) {}; +static inline void nvmet_destroy_auth(struct nvmet_ctrl *ctrl) {}; +static inline void nvmet_auth_sq_free(struct nvmet_sq *sq) {}; +static inline bool nvmet_check_auth_status(struct nvmet_req *req) +{ + return true; +} +static inline bool nvmet_has_auth(struct nvmet_ctrl *ctrl) +{ + return false; +} +static inline const char *nvmet_dhchap_dhgroup_name(u8 dhgid) { return NULL; } +#endif + #endif /* _NVMET_H */ -- 2.29.2