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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 8925EC433E1 for ; Tue, 2 Jun 2020 07:17:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5F8CC206A2 for ; Tue, 2 Jun 2020 07:17:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726177AbgFBHRI (ORCPT ); Tue, 2 Jun 2020 03:17:08 -0400 Received: from mga11.intel.com ([192.55.52.93]:55722 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725897AbgFBHRI (ORCPT ); Tue, 2 Jun 2020 03:17:08 -0400 IronPort-SDR: 38L7F9vCcj2IosFGF71X6vO+9b7pOjB2w6z0d4MhrBq1OVGU9Dhn/3IdkuD/2HM6cziDy9+TEG CuhjkhYnan2Q== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Jun 2020 00:09:00 -0700 IronPort-SDR: 04bC5ej8Zi2SdVtEycSRxFVtTb55esSDKSvNFsjXORNaDs7grwTkDtyhMPIEdWNY2XXuH79B7k 60hI2WTeGhBw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,463,1583222400"; d="scan'208";a="286544743" Received: from unknown (HELO localhost) ([10.252.59.102]) by orsmga002.jf.intel.com with ESMTP; 02 Jun 2020 00:08:55 -0700 Date: Tue, 2 Jun 2020 10:08:54 +0300 From: Jarkko Sakkinen To: Sumit Garg Cc: Mimi Zohar , James Bottomley , dhowells@redhat.com, Jens Wiklander , Jonathan Corbet , James Morris , "Serge E. Hallyn" , Casey Schaufler , Janne Karhunen , Daniel Thompson , Markus Wamser , "open list:ASYMMETRIC KEYS" , linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org, Linux Doc Mailing List , Linux Kernel Mailing List , linux-arm-kernel , op-tee@lists.trustedfirmware.org, "tee-dev @ lists . linaro . org" Subject: Re: [PATCH v4 1/4] KEYS: trusted: Add generic trusted keys framework Message-ID: <20200602070854.GA16602@linux.intel.com> References: <1588758017-30426-1-git-send-email-sumit.garg@linaro.org> <1588758017-30426-2-git-send-email-sumit.garg@linaro.org> <20200601020048.GC794847@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: On Mon, Jun 01, 2020 at 02:20:26PM +0530, Sumit Garg wrote: > On Mon, 1 Jun 2020 at 07:30, Jarkko Sakkinen > wrote: > > > > On Wed, May 06, 2020 at 03:10:14PM +0530, Sumit Garg wrote: > > > Current trusted keys framework is tightly coupled to use TPM device as > > > an underlying implementation which makes it difficult for implementations > > > like Trusted Execution Environment (TEE) etc. to provide trusked keys > > > support in case platform doesn't posses a TPM device. > > > > > > So this patch tries to add generic trusted keys framework where underlying > > > implemtations like TPM, TEE etc. could be easily plugged-in. > > > > > > Suggested-by: Jarkko Sakkinen > > > Signed-off-by: Sumit Garg > > > --- > > > include/keys/trusted-type.h | 45 ++++ > > > include/keys/trusted_tpm.h | 15 -- > > > security/keys/trusted-keys/Makefile | 1 + > > > security/keys/trusted-keys/trusted_common.c | 333 +++++++++++++++++++++++++++ > > > > I think trusted_core.c would be a better name (less ambiguous). > > > > Okay. > > > > security/keys/trusted-keys/trusted_tpm1.c | 335 +++++----------------------- > > > 5 files changed, 437 insertions(+), 292 deletions(-) > > > create mode 100644 security/keys/trusted-keys/trusted_common.c > > > > > > diff --git a/include/keys/trusted-type.h b/include/keys/trusted-type.h > > > index a94c03a..5559010 100644 > > > --- a/include/keys/trusted-type.h > > > +++ b/include/keys/trusted-type.h > > > @@ -40,6 +40,51 @@ struct trusted_key_options { > > > uint32_t policyhandle; > > > }; > > > > > > +struct trusted_key_ops { > > > + /* > > > + * flag to indicate if trusted key implementation supports migration > > > + * or not. > > > + */ > > > + unsigned char migratable; > > > + > > > + /* trusted key init */ > > > + int (*init)(void); > > > > /* Init a key. */ > > > > This API isn't initializing a key but rather the underlying interface > (see init_tpm_trusted()). So how about: > > /* Initialize key interface */ Sure (also for others can use common sense). > > > > + > > > + /* seal a trusted key */ > > > + int (*seal)(struct trusted_key_payload *p, char *datablob); > > > > /* Seal a key. */ > > > > Ack. > > > > + > > > + /* unseal a trusted key */ > > > + int (*unseal)(struct trusted_key_payload *p, char *datablob); > > > > /* Unseal a key. */ > > > > Ack. > > > > + > > > + /* get random trusted key */ > > > + int (*get_random)(unsigned char *key, size_t key_len); > > > > /* Get a randomized key. */ > > > > Ack. > > > > + > > > + /* trusted key cleanup */ > > > + void (*cleanup)(void); > > > > Please remove this from this commit since it is not in use in the scope > > of this commit. You should instead make a separate commit just for this > > callback, which explains what it is and how it will be used in the > > follow up commits. > > > > This API is pretty much relevant to TPM as well (see: > cleanup_tpm_trusted()) but I guess "cleanup()" terminology is bringing > up some confusion, so how about to call it "exit()" instead? > > > > > > +}; > > > + > > > extern struct key_type key_type_trusted; > > > +#if defined(CONFIG_TCG_TPM) > > > +extern struct trusted_key_ops tpm_trusted_key_ops; > > > +#endif > > > + > > > +#define TRUSTED_DEBUG 0 > > > + > > > +#if TRUSTED_DEBUG > > > +static inline void dump_payload(struct trusted_key_payload *p) > > > +{ > > > + pr_info("trusted_key: key_len %d\n", p->key_len); > > > + print_hex_dump(KERN_INFO, "key ", DUMP_PREFIX_NONE, > > > + 16, 1, p->key, p->key_len, 0); > > > + pr_info("trusted_key: bloblen %d\n", p->blob_len); > > > + print_hex_dump(KERN_INFO, "blob ", DUMP_PREFIX_NONE, > > > + 16, 1, p->blob, p->blob_len, 0); > > > + pr_info("trusted_key: migratable %d\n", p->migratable); > > > +} > > > +#else > > > +static inline void dump_payload(struct trusted_key_payload *p) > > > +{ > > > +} > > > +#endif > > > > > > #endif /* _KEYS_TRUSTED_TYPE_H */ > > > diff --git a/include/keys/trusted_tpm.h b/include/keys/trusted_tpm.h > > > index a56d8e1..5753231 100644 > > > --- a/include/keys/trusted_tpm.h > > > +++ b/include/keys/trusted_tpm.h > > > @@ -60,17 +60,6 @@ static inline void dump_options(struct trusted_key_options *o) > > > 16, 1, o->pcrinfo, o->pcrinfo_len, 0); > > > } > > > > > > -static inline void dump_payload(struct trusted_key_payload *p) > > > -{ > > > - pr_info("trusted_key: key_len %d\n", p->key_len); > > > - print_hex_dump(KERN_INFO, "key ", DUMP_PREFIX_NONE, > > > - 16, 1, p->key, p->key_len, 0); > > > - pr_info("trusted_key: bloblen %d\n", p->blob_len); > > > - print_hex_dump(KERN_INFO, "blob ", DUMP_PREFIX_NONE, > > > - 16, 1, p->blob, p->blob_len, 0); > > > - pr_info("trusted_key: migratable %d\n", p->migratable); > > > -} > > > - > > > static inline void dump_sess(struct osapsess *s) > > > { > > > print_hex_dump(KERN_INFO, "trusted-key: handle ", DUMP_PREFIX_NONE, > > > @@ -96,10 +85,6 @@ static inline void dump_options(struct trusted_key_options *o) > > > { > > > } > > > > > > -static inline void dump_payload(struct trusted_key_payload *p) > > > -{ > > > -} > > > - > > > static inline void dump_sess(struct osapsess *s) > > > { > > > } > > > diff --git a/security/keys/trusted-keys/Makefile b/security/keys/trusted-keys/Makefile > > > index 7b73ceb..2b1085b 100644 > > > --- a/security/keys/trusted-keys/Makefile > > > +++ b/security/keys/trusted-keys/Makefile > > > @@ -4,5 +4,6 @@ > > > # > > > > > > obj-$(CONFIG_TRUSTED_KEYS) += trusted.o > > > +trusted-y += trusted_common.o > > > trusted-y += trusted_tpm1.o > > > trusted-y += trusted_tpm2.o > > > diff --git a/security/keys/trusted-keys/trusted_common.c b/security/keys/trusted-keys/trusted_common.c > > > new file mode 100644 > > > index 0000000..9bfd081 > > > --- /dev/null > > > +++ b/security/keys/trusted-keys/trusted_common.c > > > @@ -0,0 +1,333 @@ > > > +// SPDX-License-Identifier: GPL-2.0-only > > > +/* > > > + * Copyright (C) 2010 IBM Corporation > > > + * Copyright (c) 2019, Linaro Limited > > > + * > > > + * Author: > > > + * David Safford > > > + * Added generic trusted key framework: Sumit Garg > > > + * > > > + * See Documentation/security/keys/trusted-encrypted.rst > > > + */ > > > + > > > +#include > > > +#include > > > +#include > > > +#include > > > +#include > > > +#include > > > +#include > > > +#include > > > +#include > > > +#include > > > +#include > > > +#include > > > + > > > +static struct trusted_key_ops *available_tk_ops[] = { > > > +#if defined(CONFIG_TCG_TPM) > > > + &tpm_trusted_key_ops, > > > +#endif > > > +}; > > > +static struct trusted_key_ops *tk_ops; > > > + > > > +enum { > > > + Opt_err, > > > + Opt_new, Opt_load, Opt_update, > > > +}; > > > + > > > +static const match_table_t key_tokens = { > > > + {Opt_new, "new"}, > > > + {Opt_load, "load"}, > > > + {Opt_update, "update"}, > > > + {Opt_err, NULL} > > > +}; > > > + > > > +/* > > > + * datablob_parse - parse the keyctl data and fill in the > > > + * payload structure > > > + * > > > + * On success returns 0, otherwise -EINVAL. > > > + */ > > > +static int datablob_parse(char *datablob, struct trusted_key_payload *p) > > > +{ > > > + substring_t args[MAX_OPT_ARGS]; > > > + long keylen; > > > + int ret = -EINVAL; > > > + int key_cmd; > > > + char *c; > > > + > > > + /* main command */ > > > + c = strsep(&datablob, " \t"); > > > + if (!c) > > > + return -EINVAL; > > > + key_cmd = match_token(c, key_tokens, args); > > > + switch (key_cmd) { > > > + case Opt_new: > > > + /* first argument is key size */ > > > + c = strsep(&datablob, " \t"); > > > + if (!c) > > > + return -EINVAL; > > > + ret = kstrtol(c, 10, &keylen); > > > + if (ret < 0 || keylen < MIN_KEY_SIZE || keylen > MAX_KEY_SIZE) > > > + return -EINVAL; > > > + p->key_len = keylen; > > > + ret = Opt_new; > > > + break; > > > + case Opt_load: > > > + /* first argument is sealed blob */ > > > + c = strsep(&datablob, " \t"); > > > + if (!c) > > > + return -EINVAL; > > > + p->blob_len = strlen(c) / 2; > > > + if (p->blob_len > MAX_BLOB_SIZE) > > > + return -EINVAL; > > > + ret = hex2bin(p->blob, c, p->blob_len); > > > + if (ret < 0) > > > + return -EINVAL; > > > + ret = Opt_load; > > > + break; > > > + case Opt_update: > > > + ret = Opt_update; > > > + break; > > > + case Opt_err: > > > + return -EINVAL; > > > + } > > > + return ret; > > > +} > > > + > > > +static struct trusted_key_payload *trusted_payload_alloc(struct key *key) > > > +{ > > > + struct trusted_key_payload *p = NULL; > > > + int ret; > > > + > > > + ret = key_payload_reserve(key, sizeof(*p)); > > > + if (ret < 0) > > > + return p; > > > + p = kzalloc(sizeof(*p), GFP_KERNEL); > > > + > > > + p->migratable = tk_ops->migratable; > > > + > > > + return p; > > > +} > > > + > > > +/* > > > + * trusted_instantiate - create a new trusted key > > > + * > > > + * Unseal an existing trusted blob or, for a new key, get a > > > + * random key, then seal and create a trusted key-type key, > > > + * adding it to the specified keyring. > > > + * > > > + * On success, return 0. Otherwise return errno. > > > + */ > > > +static int trusted_instantiate(struct key *key, > > > + struct key_preparsed_payload *prep) > > > +{ > > > + struct trusted_key_payload *payload = NULL; > > > + size_t datalen = prep->datalen; > > > + char *datablob; > > > + int ret = 0; > > > + int key_cmd; > > > + size_t key_len; > > > + > > > + if (datalen <= 0 || datalen > 32767 || !prep->data) > > > + return -EINVAL; > > > + > > > + datablob = kmalloc(datalen + 1, GFP_KERNEL); > > > + if (!datablob) > > > + return -ENOMEM; > > > + memcpy(datablob, prep->data, datalen); > > > + datablob[datalen] = '\0'; > > > + > > > + payload = trusted_payload_alloc(key); > > > + if (!payload) { > > > + ret = -ENOMEM; > > > + goto out; > > > + } > > > + > > > + key_cmd = datablob_parse(datablob, payload); > > > + if (key_cmd < 0) { > > > + ret = key_cmd; > > > + goto out; > > > + } > > > + > > > + dump_payload(payload); > > > + > > > + switch (key_cmd) { > > > + case Opt_load: > > > + ret = tk_ops->unseal(payload, datablob); > > > + dump_payload(payload); > > > + if (ret < 0) > > > + pr_info("trusted_key: key_unseal failed (%d)\n", ret); > > > + break; > > > + case Opt_new: > > > + key_len = payload->key_len; > > > + ret = tk_ops->get_random(payload->key, key_len); > > > + if (ret != key_len) { > > > + pr_info("trusted_key: key_create failed (%d)\n", ret); > > > + goto out; > > > + } > > > + > > > + ret = tk_ops->seal(payload, datablob); > > > + if (ret < 0) > > > + pr_info("trusted_key: key_seal failed (%d)\n", ret); > > > + break; > > > + default: > > > + ret = -EINVAL; > > > + } > > > +out: > > > + kzfree(datablob); > > > + if (!ret) > > > + rcu_assign_keypointer(key, payload); > > > + else > > > + kzfree(payload); > > > + return ret; > > > +} > > > + > > > +static void trusted_rcu_free(struct rcu_head *rcu) > > > +{ > > > + struct trusted_key_payload *p; > > > + > > > + p = container_of(rcu, struct trusted_key_payload, rcu); > > > + kzfree(p); > > > +} > > > + > > > +/* > > > + * trusted_update - reseal an existing key with new PCR values > > > + */ > > > +static int trusted_update(struct key *key, struct key_preparsed_payload *prep) > > > +{ > > > + struct trusted_key_payload *p; > > > + struct trusted_key_payload *new_p; > > > + size_t datalen = prep->datalen; > > > + char *datablob; > > > + int ret = 0; > > > + > > > + if (key_is_negative(key)) > > > + return -ENOKEY; > > > + p = key->payload.data[0]; > > > + if (!p->migratable) > > > + return -EPERM; > > > + if (datalen <= 0 || datalen > 32767 || !prep->data) > > > + return -EINVAL; > > > + > > > + datablob = kmalloc(datalen + 1, GFP_KERNEL); > > > + if (!datablob) > > > + return -ENOMEM; > > > + > > > + new_p = trusted_payload_alloc(key); > > > + if (!new_p) { > > > + ret = -ENOMEM; > > > + goto out; > > > + } > > > + > > > + memcpy(datablob, prep->data, datalen); > > > + datablob[datalen] = '\0'; > > > + ret = datablob_parse(datablob, new_p); > > > + if (ret != Opt_update) { > > > + ret = -EINVAL; > > > + kzfree(new_p); > > > + goto out; > > > + } > > > + > > > + /* copy old key values, and reseal with new pcrs */ > > > + new_p->migratable = p->migratable; > > > + new_p->key_len = p->key_len; > > > + memcpy(new_p->key, p->key, p->key_len); > > > + dump_payload(p); > > > + dump_payload(new_p); > > > + > > > + ret = tk_ops->seal(new_p, datablob); > > > + if (ret < 0) { > > > + pr_info("trusted_key: key_seal failed (%d)\n", ret); > > > + kzfree(new_p); > > > + goto out; > > > + } > > > + > > > + rcu_assign_keypointer(key, new_p); > > > + call_rcu(&p->rcu, trusted_rcu_free); > > > +out: > > > + kzfree(datablob); > > > + return ret; > > > +} > > > + > > > +/* > > > + * trusted_read - copy the sealed blob data to userspace in hex. > > > + * On success, return to userspace the trusted key datablob size. > > > + */ > > > +static long trusted_read(const struct key *key, char *buffer, > > > + size_t buflen) > > > +{ > > > + const struct trusted_key_payload *p; > > > + char *bufp; > > > + int i; > > > + > > > + p = dereference_key_locked(key); > > > + if (!p) > > > + return -EINVAL; > > > + > > > + if (buffer && buflen >= 2 * p->blob_len) { > > > + bufp = buffer; > > > + for (i = 0; i < p->blob_len; i++) > > > + bufp = hex_byte_pack(bufp, p->blob[i]); > > > + } > > > + return 2 * p->blob_len; > > > +} > > > + > > > +/* > > > + * trusted_destroy - clear and free the key's payload > > > + */ > > > +static void trusted_destroy(struct key *key) > > > +{ > > > + kzfree(key->payload.data[0]); > > > +} > > > + > > > +struct key_type key_type_trusted = { > > > + .name = "trusted", > > > + .instantiate = trusted_instantiate, > > > + .update = trusted_update, > > > + .destroy = trusted_destroy, > > > + .describe = user_describe, > > > + .read = trusted_read, > > > +}; > > > +EXPORT_SYMBOL_GPL(key_type_trusted); > > > + > > > +static int __init init_trusted(void) > > > +{ > > > + int i, ret = 0; > > > + > > > + for (i = 0; i < sizeof(available_tk_ops); i++) { > > > + tk_ops = available_tk_ops[i]; > > > + > > > + if (!(tk_ops && tk_ops->init && tk_ops->seal && > > > + tk_ops->unseal && tk_ops->get_random)) > > > + continue; > > > + > > > + ret = tk_ops->init(); > > > + if (ret) { > > > + if (tk_ops->cleanup) > > > + tk_ops->cleanup(); > > > + } else { > > > + break; > > > + } > > > + } > > > + > > > + /* > > > + * encrypted_keys.ko depends on successful load of this module even if > > > + * trusted key implementation is not found. > > > + */ > > > + if (ret == -ENODEV) > > > + return 0; > > > + > > > + return ret; > > > +} > > > + > > > +static void __exit cleanup_trusted(void) > > > +{ > > > + if (tk_ops->cleanup) > > > + tk_ops->cleanup(); > > > +} > > > + > > > +late_initcall(init_trusted); > > > +module_exit(cleanup_trusted); > > > + > > > +MODULE_LICENSE("GPL"); > > > diff --git a/security/keys/trusted-keys/trusted_tpm1.c b/security/keys/trusted-keys/trusted_tpm1.c > > > index 8001ab0..32fd1ea 100644 > > > --- a/security/keys/trusted-keys/trusted_tpm1.c > > > +++ b/security/keys/trusted-keys/trusted_tpm1.c > > > @@ -1,29 +1,26 @@ > > > // SPDX-License-Identifier: GPL-2.0-only > > > /* > > > * Copyright (C) 2010 IBM Corporation > > > + * Copyright (c) 2019, Linaro Limited > > > * > > > * Author: > > > * David Safford > > > + * Switch to generic trusted key framework: Sumit Garg > > > * > > > * See Documentation/security/keys/trusted-encrypted.rst > > > */ > > > > > > #include > > > -#include > > > -#include > > > #include > > > #include > > > #include > > > #include > > > #include > > > -#include > > > #include > > > #include > > > -#include > > > #include > > > #include > > > #include > > > -#include > > > #include > > > #include > > > > > > @@ -703,7 +700,6 @@ static int key_unseal(struct trusted_key_payload *p, > > > > > > enum { > > > Opt_err, > > > - Opt_new, Opt_load, Opt_update, > > > Opt_keyhandle, Opt_keyauth, Opt_blobauth, > > > Opt_pcrinfo, Opt_pcrlock, Opt_migratable, > > > Opt_hash, > > > @@ -712,9 +708,6 @@ enum { > > > }; > > > > > > static const match_table_t key_tokens = { > > > - {Opt_new, "new"}, > > > - {Opt_load, "load"}, > > > - {Opt_update, "update"}, > > > {Opt_keyhandle, "keyhandle=%s"}, > > > {Opt_keyauth, "keyauth=%s"}, > > > {Opt_blobauth, "blobauth=%s"}, > > > @@ -841,71 +834,6 @@ static int getoptions(char *c, struct trusted_key_payload *pay, > > > return 0; > > > } > > > > > > -/* > > > - * datablob_parse - parse the keyctl data and fill in the > > > - * payload and options structures > > > - * > > > - * On success returns 0, otherwise -EINVAL. > > > - */ > > > -static int datablob_parse(char *datablob, struct trusted_key_payload *p, > > > - struct trusted_key_options *o) > > > -{ > > > - substring_t args[MAX_OPT_ARGS]; > > > - long keylen; > > > - int ret = -EINVAL; > > > - int key_cmd; > > > - char *c; > > > - > > > - /* main command */ > > > - c = strsep(&datablob, " \t"); > > > - if (!c) > > > - return -EINVAL; > > > - key_cmd = match_token(c, key_tokens, args); > > > - switch (key_cmd) { > > > - case Opt_new: > > > - /* first argument is key size */ > > > - c = strsep(&datablob, " \t"); > > > - if (!c) > > > - return -EINVAL; > > > - ret = kstrtol(c, 10, &keylen); > > > - if (ret < 0 || keylen < MIN_KEY_SIZE || keylen > MAX_KEY_SIZE) > > > - return -EINVAL; > > > - p->key_len = keylen; > > > - ret = getoptions(datablob, p, o); > > > - if (ret < 0) > > > - return ret; > > > - ret = Opt_new; > > > - break; > > > - case Opt_load: > > > - /* first argument is sealed blob */ > > > - c = strsep(&datablob, " \t"); > > > - if (!c) > > > - return -EINVAL; > > > - p->blob_len = strlen(c) / 2; > > > - if (p->blob_len > MAX_BLOB_SIZE) > > > - return -EINVAL; > > > - ret = hex2bin(p->blob, c, p->blob_len); > > > - if (ret < 0) > > > - return -EINVAL; > > > - ret = getoptions(datablob, p, o); > > > - if (ret < 0) > > > - return ret; > > > - ret = Opt_load; > > > - break; > > > - case Opt_update: > > > - /* all arguments are options */ > > > - ret = getoptions(datablob, p, o); > > > - if (ret < 0) > > > - return ret; > > > - ret = Opt_update; > > > - break; > > > - case Opt_err: > > > - return -EINVAL; > > > - break; > > > - } > > > - return ret; > > > -} > > > - > > > static struct trusted_key_options *trusted_options_alloc(void) > > > { > > > struct trusted_key_options *options; > > > @@ -926,248 +854,99 @@ static struct trusted_key_options *trusted_options_alloc(void) > > > return options; > > > } > > > > > > -static struct trusted_key_payload *trusted_payload_alloc(struct key *key) > > > +static int tpm_tk_seal(struct trusted_key_payload *p, char *datablob) > > > { > > > - struct trusted_key_payload *p = NULL; > > > - int ret; > > > - > > > - ret = key_payload_reserve(key, sizeof *p); > > > - if (ret < 0) > > > - return p; > > > - p = kzalloc(sizeof *p, GFP_KERNEL); > > > - if (p) > > > - p->migratable = 1; /* migratable by default */ > > > - return p; > > > -} > > > - > > > -/* > > > - * trusted_instantiate - create a new trusted key > > > - * > > > - * Unseal an existing trusted blob or, for a new key, get a > > > - * random key, then seal and create a trusted key-type key, > > > - * adding it to the specified keyring. > > > - * > > > - * On success, return 0. Otherwise return errno. > > > - */ > > > -static int trusted_instantiate(struct key *key, > > > - struct key_preparsed_payload *prep) > > > -{ > > > - struct trusted_key_payload *payload = NULL; > > > struct trusted_key_options *options = NULL; > > > - size_t datalen = prep->datalen; > > > - char *datablob; > > > int ret = 0; > > > - int key_cmd; > > > - size_t key_len; > > > int tpm2; > > > > > > tpm2 = tpm_is_tpm2(chip); > > > if (tpm2 < 0) > > > return tpm2; > > > > > > - if (datalen <= 0 || datalen > 32767 || !prep->data) > > > - return -EINVAL; > > > - > > > - datablob = kmalloc(datalen + 1, GFP_KERNEL); > > > - if (!datablob) > > > - return -ENOMEM; > > > - memcpy(datablob, prep->data, datalen); > > > - datablob[datalen] = '\0'; > > > - > > > options = trusted_options_alloc(); > > > - if (!options) { > > > - ret = -ENOMEM; > > > - goto out; > > > - } > > > - payload = trusted_payload_alloc(key); > > > - if (!payload) { > > > - ret = -ENOMEM; > > > - goto out; > > > - } > > > + if (!options) > > > + return -ENOMEM; > > > > > > - key_cmd = datablob_parse(datablob, payload, options); > > > - if (key_cmd < 0) { > > > - ret = key_cmd; > > > + ret = getoptions(datablob, p, options); > > > + if (ret < 0) > > > goto out; > > > - } > > > + dump_options(options); > > > > > > if (!options->keyhandle) { > > > ret = -EINVAL; > > > goto out; > > > } > > > > > > - dump_payload(payload); > > > - dump_options(options); > > > + if (tpm2) > > > + ret = tpm2_seal_trusted(chip, p, options); > > > + else > > > + ret = key_seal(p, options); > > > + if (ret < 0) { > > > + pr_info("tpm_trusted_key: key_seal failed (%d)\n", ret); > > > + goto out; > > > + } > > > > > > - switch (key_cmd) { > > > - case Opt_load: > > > - if (tpm2) > > > - ret = tpm2_unseal_trusted(chip, payload, options); > > > - else > > > - ret = key_unseal(payload, options); > > > - dump_payload(payload); > > > - dump_options(options); > > > - if (ret < 0) > > > - pr_info("trusted_key: key_unseal failed (%d)\n", ret); > > > - break; > > > - case Opt_new: > > > - key_len = payload->key_len; > > > - ret = tpm_get_random(chip, payload->key, key_len); > > > - if (ret != key_len) { > > > - pr_info("trusted_key: key_create failed (%d)\n", ret); > > > + if (options->pcrlock) { > > > + ret = pcrlock(options->pcrlock); > > > + if (ret < 0) { > > > + pr_info("tpm_trusted_key: pcrlock failed (%d)\n", ret); > > > goto out; > > > } > > > - if (tpm2) > > > - ret = tpm2_seal_trusted(chip, payload, options); > > > - else > > > - ret = key_seal(payload, options); > > > - if (ret < 0) > > > - pr_info("trusted_key: key_seal failed (%d)\n", ret); > > > - break; > > > - default: > > > - ret = -EINVAL; > > > - goto out; > > > } > > > - if (!ret && options->pcrlock) > > > - ret = pcrlock(options->pcrlock); > > > out: > > > - kzfree(datablob); > > > kzfree(options); > > > - if (!ret) > > > - rcu_assign_keypointer(key, payload); > > > - else > > > - kzfree(payload); > > > return ret; > > > } > > > > > > -static void trusted_rcu_free(struct rcu_head *rcu) > > > +static int tpm_tk_unseal(struct trusted_key_payload *p, char *datablob) > > > { > > > - struct trusted_key_payload *p; > > > - > > > - p = container_of(rcu, struct trusted_key_payload, rcu); > > > - kzfree(p); > > > -} > > > - > > > -/* > > > - * trusted_update - reseal an existing key with new PCR values > > > - */ > > > -static int trusted_update(struct key *key, struct key_preparsed_payload *prep) > > > -{ > > > - struct trusted_key_payload *p; > > > - struct trusted_key_payload *new_p; > > > - struct trusted_key_options *new_o; > > > - size_t datalen = prep->datalen; > > > - char *datablob; > > > + struct trusted_key_options *options = NULL; > > > int ret = 0; > > > + int tpm2; > > > > > > - if (key_is_negative(key)) > > > - return -ENOKEY; > > > - p = key->payload.data[0]; > > > - if (!p->migratable) > > > - return -EPERM; > > > - if (datalen <= 0 || datalen > 32767 || !prep->data) > > > - return -EINVAL; > > > + tpm2 = tpm_is_tpm2(chip); > > > + if (tpm2 < 0) > > > + return tpm2; > > > > > > - datablob = kmalloc(datalen + 1, GFP_KERNEL); > > > - if (!datablob) > > > + options = trusted_options_alloc(); > > > + if (!options) > > > return -ENOMEM; > > > - new_o = trusted_options_alloc(); > > > - if (!new_o) { > > > - ret = -ENOMEM; > > > - goto out; > > > - } > > > - new_p = trusted_payload_alloc(key); > > > - if (!new_p) { > > > - ret = -ENOMEM; > > > - goto out; > > > - } > > > > > > - memcpy(datablob, prep->data, datalen); > > > - datablob[datalen] = '\0'; > > > - ret = datablob_parse(datablob, new_p, new_o); > > > - if (ret != Opt_update) { > > > - ret = -EINVAL; > > > - kzfree(new_p); > > > + ret = getoptions(datablob, p, options); > > > + if (ret < 0) > > > goto out; > > > - } > > > + dump_options(options); > > > > > > - if (!new_o->keyhandle) { > > > + if (!options->keyhandle) { > > > ret = -EINVAL; > > > - kzfree(new_p); > > > goto out; > > > } > > > > > > - /* copy old key values, and reseal with new pcrs */ > > > - new_p->migratable = p->migratable; > > > - new_p->key_len = p->key_len; > > > - memcpy(new_p->key, p->key, p->key_len); > > > - dump_payload(p); > > > - dump_payload(new_p); > > > + if (tpm2) > > > + ret = tpm2_unseal_trusted(chip, p, options); > > > + else > > > + ret = key_unseal(p, options); > > > + if (ret < 0) > > > + pr_info("tpm_trusted_key: key_unseal failed (%d)\n", ret); > > > > > > - ret = key_seal(new_p, new_o); > > > - if (ret < 0) { > > > - pr_info("trusted_key: key_seal failed (%d)\n", ret); > > > - kzfree(new_p); > > > - goto out; > > > - } > > > - if (new_o->pcrlock) { > > > - ret = pcrlock(new_o->pcrlock); > > > + if (options->pcrlock) { > > > + ret = pcrlock(options->pcrlock); > > > if (ret < 0) { > > > - pr_info("trusted_key: pcrlock failed (%d)\n", ret); > > > - kzfree(new_p); > > > + pr_info("tpm_trusted_key: pcrlock failed (%d)\n", ret); > > > goto out; > > > } > > > } > > > - rcu_assign_keypointer(key, new_p); > > > - call_rcu(&p->rcu, trusted_rcu_free); > > > out: > > > - kzfree(datablob); > > > - kzfree(new_o); > > > + kzfree(options); > > > return ret; > > > } > > > > > > -/* > > > - * trusted_read - copy the sealed blob data to userspace in hex. > > > - * On success, return to userspace the trusted key datablob size. > > > - */ > > > -static long trusted_read(const struct key *key, char *buffer, > > > - size_t buflen) > > > -{ > > > - const struct trusted_key_payload *p; > > > - char *bufp; > > > - int i; > > > - > > > - p = dereference_key_locked(key); > > > - if (!p) > > > - return -EINVAL; > > > - > > > - if (buffer && buflen >= 2 * p->blob_len) { > > > - bufp = buffer; > > > - for (i = 0; i < p->blob_len; i++) > > > - bufp = hex_byte_pack(bufp, p->blob[i]); > > > - } > > > - return 2 * p->blob_len; > > > -} > > > - > > > -/* > > > - * trusted_destroy - clear and free the key's payload > > > - */ > > > -static void trusted_destroy(struct key *key) > > > +int tpm_tk_get_random(unsigned char *key, size_t key_len) > > > { > > > - kzfree(key->payload.data[0]); > > > + return tpm_get_random(chip, key, key_len); > > > } > > > > > > -struct key_type key_type_trusted = { > > > - .name = "trusted", > > > - .instantiate = trusted_instantiate, > > > - .update = trusted_update, > > > - .destroy = trusted_destroy, > > > - .describe = user_describe, > > > - .read = trusted_read, > > > -}; > > > - > > > -EXPORT_SYMBOL_GPL(key_type_trusted); > > > - > > > static void trusted_shash_release(void) > > > { > > > if (hashalg) > > > @@ -1182,14 +961,14 @@ static int __init trusted_shash_alloc(void) > > > > > > hmacalg = crypto_alloc_shash(hmac_alg, 0, 0); > > > if (IS_ERR(hmacalg)) { > > > - pr_info("trusted_key: could not allocate crypto %s\n", > > > + pr_info("tpm_trusted_key: could not allocate crypto %s\n", > > > hmac_alg); > > > return PTR_ERR(hmacalg); > > > } > > > > > > hashalg = crypto_alloc_shash(hash_alg, 0, 0); > > > if (IS_ERR(hashalg)) { > > > - pr_info("trusted_key: could not allocate crypto %s\n", > > > + pr_info("tpm_trusted_key: could not allocate crypto %s\n", > > > hash_alg); > > > ret = PTR_ERR(hashalg); > > > goto hashalg_fail; > > > @@ -1217,16 +996,13 @@ static int __init init_digests(void) > > > return 0; > > > } > > > > > > -static int __init init_trusted(void) > > > +static int __init init_tpm_trusted(void) > > > { > > > int ret; > > > > > > - /* encrypted_keys.ko depends on successful load of this module even if > > > - * TPM is not used. > > > - */ > > > chip = tpm_default_chip(); > > > if (!chip) > > > - return 0; > > > + return -ENODEV; > > > > > > ret = init_digests(); > > > if (ret < 0) > > > @@ -1247,7 +1023,7 @@ static int __init init_trusted(void) > > > return ret; > > > } > > > > > > -static void __exit cleanup_trusted(void) > > > +static void __exit cleanup_tpm_trusted(void) > > > { > > > if (chip) { > > > put_device(&chip->dev); > > > @@ -1257,7 +1033,12 @@ static void __exit cleanup_trusted(void) > > > } > > > } > > > > > > -late_initcall(init_trusted); > > > -module_exit(cleanup_trusted); > > > - > > > -MODULE_LICENSE("GPL"); > > > +struct trusted_key_ops tpm_trusted_key_ops = { > > > + .migratable = 1, /* migratable by default */ > > > + .init = init_tpm_trusted, > > > + .seal = tpm_tk_seal, > > > + .unseal = tpm_tk_unseal, > > > + .get_random = tpm_tk_get_random, > > > + .cleanup = cleanup_tpm_trusted, > > > +}; > > > +EXPORT_SYMBOL_GPL(tpm_trusted_key_ops); > > > > Everywhere: do not use 'tk'. Use 'trusted' in those places. We do not > > want a new acronym. > > Okay. > > -Sumit > > > > > /Jarkko