From patchwork Wed Nov 14 15:31:02 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 10682779 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 144E014BA for ; Wed, 14 Nov 2018 15:34:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 071392ADAF for ; Wed, 14 Nov 2018 15:34:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EE9232BA3E; Wed, 14 Nov 2018 15:34:05 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6B6112ADAF for ; Wed, 14 Nov 2018 15:34:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733101AbeKOBhr (ORCPT ); Wed, 14 Nov 2018 20:37:47 -0500 Received: from lhrrgout.huawei.com ([185.176.76.210]:32765 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1732450AbeKOBhr (ORCPT ); Wed, 14 Nov 2018 20:37:47 -0500 Received: from LHREML714-CAH.china.huawei.com (unknown [172.18.7.107]) by Forcepoint Email with ESMTP id 36550C96F91EB; Wed, 14 Nov 2018 15:34:01 +0000 (GMT) Received: from roberto-HP-EliteDesk-800-G2-DM-65W.huawei.com (10.204.65.153) by smtpsuk.huawei.com (10.201.108.37) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 14 Nov 2018 15:33:53 +0000 From: Roberto Sassu To: , , , CC: , , , , Roberto Sassu Subject: [PATCH v5 1/7] tpm: dynamically allocate the allocated_banks array Date: Wed, 14 Nov 2018 16:31:02 +0100 Message-ID: <20181114153108.12907-2-roberto.sassu@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181114153108.12907-1-roberto.sassu@huawei.com> References: <20181114153108.12907-1-roberto.sassu@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.204.65.153] X-CFilter-Loop: Reflected Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP This patch renames active_banks (member of tpm_chip) to allocated_banks, stores the number of allocated PCR banks in nr_allocated_banks (new member of tpm_chip), and replaces the static array with a pointer to a dynamically allocated array. tpm2_get_pcr_allocation() determines if a PCR bank is allocated by checking the mask in the TPML_PCR_SELECTION structure returned by the TPM for TPM2_Get_Capability(). One PCR bank with algorithm set to SHA1 is always allocated for TPM 1.x. As a consequence of the introduction of nr_allocated_banks, tpm_pcr_extend() does not check anymore if the algorithm stored in tpm_chip is equal to zero. Fixes: 1db15344f874 ("tpm: implement TPM 2.0 capability to get active PCR banks") Signed-off-by: Roberto Sassu Tested-by: Jarkko Sakkinen --- drivers/char/tpm/tpm-chip.c | 1 + drivers/char/tpm/tpm-interface.c | 18 +++++++++-------- drivers/char/tpm/tpm.h | 3 ++- drivers/char/tpm/tpm1-cmd.c | 10 ++++++++++ drivers/char/tpm/tpm2-cmd.c | 34 ++++++++++++++++++++++---------- 5 files changed, 47 insertions(+), 19 deletions(-) diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c index 32db84683c40..ce851c62bb68 100644 --- a/drivers/char/tpm/tpm-chip.c +++ b/drivers/char/tpm/tpm-chip.c @@ -160,6 +160,7 @@ static void tpm_dev_release(struct device *dev) kfree(chip->log.bios_event_log); kfree(chip->work_space.context_buf); kfree(chip->work_space.session_buf); + kfree(chip->allocated_banks); kfree(chip); } diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index d9439f9abe78..7b80919228be 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -488,8 +488,7 @@ EXPORT_SYMBOL_GPL(tpm_pcr_read); int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, const u8 *hash) { int rc; - struct tpm2_digest digest_list[ARRAY_SIZE(chip->active_banks)]; - u32 count = 0; + struct tpm2_digest *digest_list; int i; chip = tpm_find_get_ops(chip); @@ -497,16 +496,19 @@ int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, const u8 *hash) return -ENODEV; if (chip->flags & TPM_CHIP_FLAG_TPM2) { - memset(digest_list, 0, sizeof(digest_list)); + digest_list = kcalloc(chip->nr_allocated_banks, + sizeof(*digest_list), GFP_KERNEL); + if (!digest_list) + return -ENOMEM; - for (i = 0; i < ARRAY_SIZE(chip->active_banks) && - chip->active_banks[i] != TPM2_ALG_ERROR; i++) { - digest_list[i].alg_id = chip->active_banks[i]; + for (i = 0; i < chip->nr_allocated_banks; i++) { + digest_list[i].alg_id = chip->allocated_banks[i]; memcpy(digest_list[i].digest, hash, TPM_DIGEST_SIZE); - count++; } - rc = tpm2_pcr_extend(chip, pcr_idx, count, digest_list); + rc = tpm2_pcr_extend(chip, pcr_idx, chip->nr_allocated_banks, + digest_list); + kfree(digest_list); tpm_put_ops(chip); return rc; } diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index f27d1f38a93d..6b94306ab7c5 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -257,7 +257,8 @@ struct tpm_chip { const struct attribute_group *groups[3]; unsigned int groups_cnt; - u16 active_banks[7]; + u32 nr_allocated_banks; + u16 *allocated_banks; #ifdef CONFIG_ACPI acpi_handle acpi_dev_handle; char ppi_version[TPM_PPI_VERSION_LEN + 1]; diff --git a/drivers/char/tpm/tpm1-cmd.c b/drivers/char/tpm/tpm1-cmd.c index 6f306338953b..0874743ca96d 100644 --- a/drivers/char/tpm/tpm1-cmd.c +++ b/drivers/char/tpm/tpm1-cmd.c @@ -709,6 +709,16 @@ int tpm1_auto_startup(struct tpm_chip *chip) goto out; } + chip->allocated_banks = kcalloc(1, sizeof(*chip->allocated_banks), + GFP_KERNEL); + if (!chip->allocated_banks) { + rc = -ENOMEM; + goto out; + } + + chip->allocated_banks[0] = TPM2_ALG_SHA1; + chip->nr_allocated_banks = 1; + return rc; out: if (rc > 0) diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index a6bec13afa69..245669a7aba5 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -234,7 +234,7 @@ int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, u32 count, int i; int j; - if (count > ARRAY_SIZE(chip->active_banks)) + if (count > chip->nr_allocated_banks) return -EINVAL; rc = tpm_buf_init(&buf, TPM2_ST_SESSIONS, TPM2_CC_PCR_EXTEND); @@ -825,11 +825,14 @@ static ssize_t tpm2_get_pcr_allocation(struct tpm_chip *chip) void *marker; void *end; void *pcr_select_offset; - unsigned int count; u32 sizeof_pcr_selection; + u32 nr_possible_banks; + u32 nr_alloc_banks = 0; + u16 hash_alg; u32 rsp_len; int rc; int i = 0; + int j; rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_GET_CAPABILITY); if (rc) @@ -844,11 +847,14 @@ static ssize_t tpm2_get_pcr_allocation(struct tpm_chip *chip) if (rc) goto out; - count = be32_to_cpup( + nr_possible_banks = be32_to_cpup( (__be32 *)&buf.data[TPM_HEADER_SIZE + 5]); - if (count > ARRAY_SIZE(chip->active_banks)) { - rc = -ENODEV; + chip->allocated_banks = kcalloc(nr_possible_banks, + sizeof(*chip->allocated_banks), + GFP_KERNEL); + if (!chip->allocated_banks) { + rc = -ENOMEM; goto out; } @@ -857,7 +863,7 @@ static ssize_t tpm2_get_pcr_allocation(struct tpm_chip *chip) rsp_len = be32_to_cpup((__be32 *)&buf.data[2]); end = &buf.data[rsp_len]; - for (i = 0; i < count; i++) { + for (i = 0; i < nr_possible_banks; i++) { pcr_select_offset = marker + offsetof(struct tpm2_pcr_selection, size_of_select); if (pcr_select_offset >= end) { @@ -866,17 +872,25 @@ static ssize_t tpm2_get_pcr_allocation(struct tpm_chip *chip) } memcpy(&pcr_selection, marker, sizeof(pcr_selection)); - chip->active_banks[i] = be16_to_cpu(pcr_selection.hash_alg); + hash_alg = be16_to_cpu(pcr_selection.hash_alg); + + for (j = 0; j < pcr_selection.size_of_select; j++) + if (pcr_selection.pcr_select[j]) + break; + + if (j < pcr_selection.size_of_select) { + chip->allocated_banks[nr_alloc_banks] = hash_alg; + nr_alloc_banks++; + } + sizeof_pcr_selection = sizeof(pcr_selection.hash_alg) + sizeof(pcr_selection.size_of_select) + pcr_selection.size_of_select; marker = marker + sizeof_pcr_selection; } + chip->nr_allocated_banks = nr_alloc_banks; out: - if (i < ARRAY_SIZE(chip->active_banks)) - chip->active_banks[i] = TPM2_ALG_ERROR; - tpm_buf_destroy(&buf); return rc; From patchwork Wed Nov 14 15:31:03 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 10682785 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CC8FB17F3 for ; Wed, 14 Nov 2018 15:34:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C189B289E2 for ; Wed, 14 Nov 2018 15:34:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B5C6B2BA7C; Wed, 14 Nov 2018 15:34:36 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3E3092BA3E for ; Wed, 14 Nov 2018 15:34:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732933AbeKOBiS (ORCPT ); Wed, 14 Nov 2018 20:38:18 -0500 Received: from lhrrgout.huawei.com ([185.176.76.210]:32766 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727731AbeKOBiS (ORCPT ); Wed, 14 Nov 2018 20:38:18 -0500 Received: from LHREML714-CAH.china.huawei.com (unknown [172.18.7.107]) by Forcepoint Email with ESMTP id AB69273AC78B8; Wed, 14 Nov 2018 15:34:31 +0000 (GMT) Received: from roberto-HP-EliteDesk-800-G2-DM-65W.huawei.com (10.204.65.153) by smtpsuk.huawei.com (10.201.108.37) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 14 Nov 2018 15:34:23 +0000 From: Roberto Sassu To: , , , CC: , , , , Roberto Sassu Subject: [PATCH v5 2/7] tpm: remove definition of TPM2_ACTIVE_PCR_BANKS Date: Wed, 14 Nov 2018 16:31:03 +0100 Message-ID: <20181114153108.12907-3-roberto.sassu@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181114153108.12907-1-roberto.sassu@huawei.com> References: <20181114153108.12907-1-roberto.sassu@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.204.65.153] X-CFilter-Loop: Reflected Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP tcg_efi_specid_event and tcg_pcr_event2 declaration contains static arrays for a list of hash algorithms used for event logs and event log digests. However, according to TCG EFI Protocol Specification, these arrays have variable sizes. Setting the array size to zero or 3 does not make any difference, because the parser has to adjust the offset depending on the actual array size to access structure members after the static arrays. Thus, this patch removes the declaration of TPM2_ACTIVE_PCR_BANKS and sets the array size to zero. Fixes: 4d23cc323cdb ("tpm: add securityfs support for TPM 2.0 firmware event log") Signed-off-by: Roberto Sassu --- include/linux/tpm_eventlog.h | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/include/linux/tpm_eventlog.h b/include/linux/tpm_eventlog.h index 20d9da77fc11..3d5d162f09cc 100644 --- a/include/linux/tpm_eventlog.h +++ b/include/linux/tpm_eventlog.h @@ -8,7 +8,6 @@ #define TCG_EVENT_NAME_LEN_MAX 255 #define MAX_TEXT_EVENT 1000 /* Max event string length */ #define ACPI_TCPA_SIG "TCPA" /* 0x41504354 /'TCPA' */ -#define TPM2_ACTIVE_PCR_BANKS 3 #define EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2 0x1 #define EFI_TCG2_EVENT_LOG_FORMAT_TCG_2 0x2 @@ -90,7 +89,7 @@ struct tcg_efi_specid_event { u8 spec_errata; u8 uintnsize; u32 num_algs; - struct tcg_efi_specid_event_algs digest_sizes[TPM2_ACTIVE_PCR_BANKS]; + struct tcg_efi_specid_event_algs digest_sizes[0]; u8 vendor_info_size; u8 vendor_info[0]; } __packed; @@ -117,7 +116,7 @@ struct tcg_pcr_event2 { u32 pcr_idx; u32 event_type; u32 count; - struct tpm2_digest digests[TPM2_ACTIVE_PCR_BANKS]; + struct tpm2_digest digests[0]; struct tcg_event_field event; } __packed; From patchwork Wed Nov 14 15:31:04 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 10682789 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C859A17F3 for ; Wed, 14 Nov 2018 15:35:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B5A312B61E for ; Wed, 14 Nov 2018 15:35:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AA10228891; Wed, 14 Nov 2018 15:35:12 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2DE832884F for ; Wed, 14 Nov 2018 15:35:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733270AbeKOBiy (ORCPT ); Wed, 14 Nov 2018 20:38:54 -0500 Received: from lhrrgout.huawei.com ([185.176.76.210]:32767 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1733230AbeKOBiy (ORCPT ); Wed, 14 Nov 2018 20:38:54 -0500 Received: from LHREML714-CAH.china.huawei.com (unknown [172.18.7.107]) by Forcepoint Email with ESMTP id 22F8B5F65A622; Wed, 14 Nov 2018 15:35:07 +0000 (GMT) Received: from roberto-HP-EliteDesk-800-G2-DM-65W.huawei.com (10.204.65.153) by smtpsuk.huawei.com (10.201.108.37) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 14 Nov 2018 15:34:59 +0000 From: Roberto Sassu To: , , , CC: , , , , Roberto Sassu Subject: [PATCH v5 3/7] tpm: rename and export tpm2_digest and tpm2_algorithms Date: Wed, 14 Nov 2018 16:31:04 +0100 Message-ID: <20181114153108.12907-4-roberto.sassu@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181114153108.12907-1-roberto.sassu@huawei.com> References: <20181114153108.12907-1-roberto.sassu@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.204.65.153] X-CFilter-Loop: Reflected Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP Rename tpm2_* to tpm_* and move the definitions to include/linux/tpm.h so that these can be used by other kernel subsystems (e.g. IMA). Signed-off-by: Roberto Sassu Reviewed-by: Jarkko Sakkinen Acked-by: Mimi Zohar --- drivers/char/tpm/tpm-interface.c | 2 +- drivers/char/tpm/tpm.h | 13 +------------ drivers/char/tpm/tpm1-cmd.c | 2 +- drivers/char/tpm/tpm2-cmd.c | 18 +++++++++--------- include/linux/tpm.h | 18 ++++++++++++++++++ include/linux/tpm_eventlog.h | 9 ++------- 6 files changed, 32 insertions(+), 30 deletions(-) diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index 7b80919228be..96c8261d0f04 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -488,7 +488,7 @@ EXPORT_SYMBOL_GPL(tpm_pcr_read); int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, const u8 *hash) { int rc; - struct tpm2_digest *digest_list; + struct tpm_digest *digest_list; int i; chip = tpm_find_get_ops(chip); diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index 6b94306ab7c5..e961e5c5d197 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -122,17 +122,6 @@ enum tpm2_return_codes { TPM2_RC_RETRY = 0x0922, }; -enum tpm2_algorithms { - TPM2_ALG_ERROR = 0x0000, - TPM2_ALG_SHA1 = 0x0004, - TPM2_ALG_KEYEDHASH = 0x0008, - TPM2_ALG_SHA256 = 0x000B, - TPM2_ALG_SHA384 = 0x000C, - TPM2_ALG_SHA512 = 0x000D, - TPM2_ALG_NULL = 0x0010, - TPM2_ALG_SM3_256 = 0x0012, -}; - enum tpm2_command_codes { TPM2_CC_FIRST = 0x011F, TPM2_CC_HIERARCHY_CONTROL = 0x0121, @@ -561,7 +550,7 @@ static inline u32 tpm2_rc_value(u32 rc) int tpm2_get_timeouts(struct tpm_chip *chip); int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf); int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, u32 count, - struct tpm2_digest *digests); + struct tpm_digest *digests); int tpm2_get_random(struct tpm_chip *chip, u8 *dest, size_t max); void tpm2_flush_context_cmd(struct tpm_chip *chip, u32 handle, unsigned int flags); diff --git a/drivers/char/tpm/tpm1-cmd.c b/drivers/char/tpm/tpm1-cmd.c index 0874743ca96d..ec4f197bae0a 100644 --- a/drivers/char/tpm/tpm1-cmd.c +++ b/drivers/char/tpm/tpm1-cmd.c @@ -716,7 +716,7 @@ int tpm1_auto_startup(struct tpm_chip *chip) goto out; } - chip->allocated_banks[0] = TPM2_ALG_SHA1; + chip->allocated_banks[0] = TPM_ALG_SHA1; chip->nr_allocated_banks = 1; return rc; diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index 245669a7aba5..4afd14892cbf 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -33,11 +33,11 @@ struct tpm2_hash { }; static struct tpm2_hash tpm2_hash_map[] = { - {HASH_ALGO_SHA1, TPM2_ALG_SHA1}, - {HASH_ALGO_SHA256, TPM2_ALG_SHA256}, - {HASH_ALGO_SHA384, TPM2_ALG_SHA384}, - {HASH_ALGO_SHA512, TPM2_ALG_SHA512}, - {HASH_ALGO_SM3_256, TPM2_ALG_SM3_256}, + {HASH_ALGO_SHA1, TPM_ALG_SHA1}, + {HASH_ALGO_SHA256, TPM_ALG_SHA256}, + {HASH_ALGO_SHA384, TPM_ALG_SHA384}, + {HASH_ALGO_SHA512, TPM_ALG_SHA512}, + {HASH_ALGO_SM3_256, TPM_ALG_SM3_256}, }; int tpm2_get_timeouts(struct tpm_chip *chip) @@ -192,7 +192,7 @@ int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf) pcr_select[pcr_idx >> 3] = 1 << (pcr_idx & 0x7); tpm_buf_append_u32(&buf, 1); - tpm_buf_append_u16(&buf, TPM2_ALG_SHA1); + tpm_buf_append_u16(&buf, TPM_ALG_SHA1); tpm_buf_append_u8(&buf, TPM2_PCR_SELECT_MIN); tpm_buf_append(&buf, (const unsigned char *)pcr_select, sizeof(pcr_select)); @@ -226,7 +226,7 @@ struct tpm2_null_auth_area { * Return: Same as with tpm_transmit_cmd. */ int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, u32 count, - struct tpm2_digest *digests) + struct tpm_digest *digests) { struct tpm_buf buf; struct tpm2_null_auth_area auth_area; @@ -449,7 +449,7 @@ int tpm2_seal_trusted(struct tpm_chip *chip, /* public */ tpm_buf_append_u16(&buf, 14 + options->policydigest_len); - tpm_buf_append_u16(&buf, TPM2_ALG_KEYEDHASH); + tpm_buf_append_u16(&buf, TPM_ALG_KEYEDHASH); tpm_buf_append_u16(&buf, hash); /* policy */ @@ -464,7 +464,7 @@ int tpm2_seal_trusted(struct tpm_chip *chip, } /* public parameters */ - tpm_buf_append_u16(&buf, TPM2_ALG_NULL); + tpm_buf_append_u16(&buf, TPM_ALG_NULL); tpm_buf_append_u16(&buf, 0); /* outside info */ diff --git a/include/linux/tpm.h b/include/linux/tpm.h index b49a55cf775f..330c0a481581 100644 --- a/include/linux/tpm.h +++ b/include/linux/tpm.h @@ -22,12 +22,30 @@ #ifndef __LINUX_TPM_H__ #define __LINUX_TPM_H__ +#include + #define TPM_DIGEST_SIZE 20 /* Max TPM v1.2 PCR size */ struct tpm_chip; struct trusted_key_payload; struct trusted_key_options; +enum tpm_algorithms { + TPM_ALG_ERROR = 0x0000, + TPM_ALG_SHA1 = 0x0004, + TPM_ALG_KEYEDHASH = 0x0008, + TPM_ALG_SHA256 = 0x000B, + TPM_ALG_SHA384 = 0x000C, + TPM_ALG_SHA512 = 0x000D, + TPM_ALG_NULL = 0x0010, + TPM_ALG_SM3_256 = 0x0012, +}; + +struct tpm_digest { + u16 alg_id; + u8 digest[SHA512_DIGEST_SIZE]; +} __packed; + enum TPM_OPS_FLAGS { TPM_OPS_AUTO_STARTUP = BIT(0), }; diff --git a/include/linux/tpm_eventlog.h b/include/linux/tpm_eventlog.h index 3d5d162f09cc..c9f28b4be4ae 100644 --- a/include/linux/tpm_eventlog.h +++ b/include/linux/tpm_eventlog.h @@ -3,7 +3,7 @@ #ifndef __LINUX_TPM_EVENTLOG_H__ #define __LINUX_TPM_EVENTLOG_H__ -#include +#include #define TCG_EVENT_NAME_LEN_MAX 255 #define MAX_TEXT_EVENT 1000 /* Max event string length */ @@ -107,16 +107,11 @@ struct tcg_event_field { u8 event[0]; } __packed; -struct tpm2_digest { - u16 alg_id; - u8 digest[SHA512_DIGEST_SIZE]; -} __packed; - struct tcg_pcr_event2 { u32 pcr_idx; u32 event_type; u32 count; - struct tpm2_digest digests[0]; + struct tpm_digest digests[0]; struct tcg_event_field event; } __packed; From patchwork Wed Nov 14 15:31:05 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 10682791 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 07D8314BA for ; Wed, 14 Nov 2018 15:35:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ED99D28703 for ; Wed, 14 Nov 2018 15:35:47 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E1D8728891; Wed, 14 Nov 2018 15:35:47 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4889E28703 for ; Wed, 14 Nov 2018 15:35:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387588AbeKOBjZ (ORCPT ); Wed, 14 Nov 2018 20:39:25 -0500 Received: from lhrrgout.huawei.com ([185.176.76.210]:32768 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1733279AbeKOBjY (ORCPT ); Wed, 14 Nov 2018 20:39:24 -0500 Received: from LHREML714-CAH.china.huawei.com (unknown [172.18.7.107]) by Forcepoint Email with ESMTP id 8906DB9A94623; Wed, 14 Nov 2018 15:35:37 +0000 (GMT) Received: from roberto-HP-EliteDesk-800-G2-DM-65W.huawei.com (10.204.65.153) by smtpsuk.huawei.com (10.201.108.37) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 14 Nov 2018 15:35:33 +0000 From: Roberto Sassu To: , , , CC: , , , , Roberto Sassu Subject: [PATCH v5 4/7] tpm: modify tpm_pcr_read() definition to pass a TPM hash algorithm Date: Wed, 14 Nov 2018 16:31:05 +0100 Message-ID: <20181114153108.12907-5-roberto.sassu@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181114153108.12907-1-roberto.sassu@huawei.com> References: <20181114153108.12907-1-roberto.sassu@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.204.65.153] X-CFilter-Loop: Reflected Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP Currently the TPM driver allows other kernel subsystems to read only the SHA1 PCR bank. This patch modifies the parameters of tpm_pcr_read() and tpm2_pcr_read() to pass a tpm_digest structure, which contains the desired hash algorithm. Also, since commit 125a22105410 ("tpm: React correctly to RC_TESTING from TPM 2.0 self tests") removed the call to tpm2_pcr_read(), the new parameter is expected to be always not NULL. Due to the API change, IMA functions have been modified. Signed-off-by: Roberto Sassu Acked-by: Mimi Zohar --- drivers/char/tpm/tpm-interface.c | 9 +++++---- drivers/char/tpm/tpm.h | 3 ++- drivers/char/tpm/tpm2-cmd.c | 23 ++++++++++++++++------- include/linux/tpm.h | 6 ++++-- security/integrity/ima/ima_crypto.c | 10 +++++----- 5 files changed, 32 insertions(+), 19 deletions(-) diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index 96c8261d0f04..04aa39432f58 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -451,11 +451,12 @@ EXPORT_SYMBOL_GPL(tpm_is_tpm2); * tpm_pcr_read - read a PCR value from SHA1 bank * @chip: a &struct tpm_chip instance, %NULL for the default chip * @pcr_idx: the PCR to be retrieved - * @res_buf: the value of the PCR + * @digest_struct: the PCR bank and buffer current PCR value is written to * * Return: same as with tpm_transmit_cmd() */ -int tpm_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf) +int tpm_pcr_read(struct tpm_chip *chip, u32 pcr_idx, + struct tpm_digest *digest_struct) { int rc; @@ -464,9 +465,9 @@ int tpm_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf) return -ENODEV; if (chip->flags & TPM_CHIP_FLAG_TPM2) - rc = tpm2_pcr_read(chip, pcr_idx, res_buf); + rc = tpm2_pcr_read(chip, pcr_idx, digest_struct); else - rc = tpm1_pcr_read(chip, pcr_idx, res_buf); + rc = tpm1_pcr_read(chip, pcr_idx, digest_struct->digest); tpm_put_ops(chip); return rc; diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index e961e5c5d197..33b293da69d6 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -548,7 +548,8 @@ static inline u32 tpm2_rc_value(u32 rc) } int tpm2_get_timeouts(struct tpm_chip *chip); -int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf); +int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx, + struct tpm_digest *digest_struct); int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, u32 count, struct tpm_digest *digests); int tpm2_get_random(struct tpm_chip *chip, u8 *dest, size_t max); diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index 4afd14892cbf..0d72c2f98bd6 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -171,16 +171,18 @@ struct tpm2_pcr_read_out { * tpm2_pcr_read() - read a PCR value * @chip: TPM chip to use. * @pcr_idx: index of the PCR to read. - * @res_buf: buffer to store the resulting hash. + * @digest_struct: PCR bank and buffer current PCR value is written to. * * Return: Same as with tpm_transmit_cmd. */ -int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf) +int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx, + struct tpm_digest *digest_struct) { int rc; struct tpm_buf buf; struct tpm2_pcr_read_out *out; u8 pcr_select[TPM2_PCR_SELECT_MIN] = {0}; + u16 digest_size; if (pcr_idx >= TPM2_PLATFORM_PCR) return -EINVAL; @@ -192,18 +194,25 @@ int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf) pcr_select[pcr_idx >> 3] = 1 << (pcr_idx & 0x7); tpm_buf_append_u32(&buf, 1); - tpm_buf_append_u16(&buf, TPM_ALG_SHA1); + tpm_buf_append_u16(&buf, digest_struct->alg_id); tpm_buf_append_u8(&buf, TPM2_PCR_SELECT_MIN); tpm_buf_append(&buf, (const unsigned char *)pcr_select, sizeof(pcr_select)); rc = tpm_transmit_cmd(chip, NULL, buf.data, PAGE_SIZE, 0, 0, - res_buf ? "attempting to read a pcr value" : NULL); - if (rc == 0 && res_buf) { - out = (struct tpm2_pcr_read_out *)&buf.data[TPM_HEADER_SIZE]; - memcpy(res_buf, out->digest, SHA1_DIGEST_SIZE); + "attempting to read a pcr value"); + if (rc) + goto out; + + out = (struct tpm2_pcr_read_out *)&buf.data[TPM_HEADER_SIZE]; + digest_size = be16_to_cpu(out->digest_size); + if (digest_size > sizeof(digest_struct->digest)) { + rc = -EINVAL; + goto out; } + memcpy(digest_struct->digest, out->digest, digest_size); +out: tpm_buf_destroy(&buf); return rc; } diff --git a/include/linux/tpm.h b/include/linux/tpm.h index 330c0a481581..077fd31783ad 100644 --- a/include/linux/tpm.h +++ b/include/linux/tpm.h @@ -71,7 +71,8 @@ struct tpm_class_ops { #if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE) extern int tpm_is_tpm2(struct tpm_chip *chip); -extern int tpm_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf); +extern int tpm_pcr_read(struct tpm_chip *chip, u32 pcr_idx, + struct tpm_digest *digest_struct); extern int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, const u8 *hash); extern int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen); extern int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max); @@ -88,7 +89,8 @@ static inline int tpm_is_tpm2(struct tpm_chip *chip) return -ENODEV; } -static inline int tpm_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf) +static inline int tpm_pcr_read(struct tpm_chip *chip, int pcr_idx, + struct tpm_digest *digest_struct) { return -ENODEV; } diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c index acf2c7df7145..16a4f45863b1 100644 --- a/security/integrity/ima/ima_crypto.c +++ b/security/integrity/ima/ima_crypto.c @@ -643,12 +643,12 @@ int ima_calc_buffer_hash(const void *buf, loff_t len, return calc_buffer_shash(buf, len, hash); } -static void __init ima_pcrread(u32 idx, u8 *pcr) +static void __init ima_pcrread(u32 idx, struct tpm_digest *d) { if (!ima_tpm_chip) return; - if (tpm_pcr_read(ima_tpm_chip, idx, pcr) != 0) + if (tpm_pcr_read(ima_tpm_chip, idx, d) != 0) pr_err("Error Communicating to TPM chip\n"); } @@ -658,7 +658,7 @@ static void __init ima_pcrread(u32 idx, u8 *pcr) static int __init ima_calc_boot_aggregate_tfm(char *digest, struct crypto_shash *tfm) { - u8 pcr_i[TPM_DIGEST_SIZE]; + struct tpm_digest d = { .alg_id = TPM_ALG_SHA1, .digest = {0} }; int rc; u32 i; SHASH_DESC_ON_STACK(shash, tfm); @@ -672,9 +672,9 @@ static int __init ima_calc_boot_aggregate_tfm(char *digest, /* cumulative sha1 over tpm registers 0-7 */ for (i = TPM_PCR0; i < TPM_PCR8; i++) { - ima_pcrread(i, pcr_i); + ima_pcrread(i, &d); /* now accumulate with current aggregate */ - rc = crypto_shash_update(shash, pcr_i, TPM_DIGEST_SIZE); + rc = crypto_shash_update(shash, d.digest, TPM_DIGEST_SIZE); } if (!rc) crypto_shash_final(shash, digest); From patchwork Wed Nov 14 15:31:06 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 10682801 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DEDEC14E2 for ; Wed, 14 Nov 2018 15:36:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D0C9B28703 for ; Wed, 14 Nov 2018 15:36:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C4A6028891; Wed, 14 Nov 2018 15:36:17 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3756828703 for ; Wed, 14 Nov 2018 15:36:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387447AbeKOBjy (ORCPT ); Wed, 14 Nov 2018 20:39:54 -0500 Received: from lhrrgout.huawei.com ([185.176.76.210]:32769 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727731AbeKOBjy (ORCPT ); Wed, 14 Nov 2018 20:39:54 -0500 Received: from LHREML714-CAH.china.huawei.com (unknown [172.18.7.107]) by Forcepoint Email with ESMTP id F0A705EEB3D67; Wed, 14 Nov 2018 15:36:07 +0000 (GMT) Received: from roberto-HP-EliteDesk-800-G2-DM-65W.huawei.com (10.204.65.153) by smtpsuk.huawei.com (10.201.108.37) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 14 Nov 2018 15:36:03 +0000 From: Roberto Sassu To: , , , CC: , , , , Roberto Sassu Subject: [PATCH v5 5/7] tpm: retrieve digest size of unknown algorithms with PCR read Date: Wed, 14 Nov 2018 16:31:06 +0100 Message-ID: <20181114153108.12907-6-roberto.sassu@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181114153108.12907-1-roberto.sassu@huawei.com> References: <20181114153108.12907-1-roberto.sassu@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.204.65.153] X-CFilter-Loop: Reflected Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP Currently, the TPM driver retrieves the digest size from a table mapping TPM algorithms identifiers to identifiers defined by the crypto subsystem. If the algorithm is not defined by the latter, the digest size can be retrieved from the output of the PCR read command. The patch retrieves at TPM startup the digest sizes for each PCR bank and stores them in the new structure tpm_bank_info, member of tpm_chip, so that the information can be passed to other kernel subsystems. tpm_bank_info contains: the TPM algorithm identifier, necessary to generate the event log as defined by Trusted Computing Group (TCG); the digest size, to pad/truncate a digest calculated with a different algorithm; the crypto subsystem identifier, to calculate the digest of event data. Signed-off-by: Roberto Sassu Reviewed-by: Jarkko Sakkinen Acked-by: Mimi Zohar --- drivers/char/tpm/tpm-interface.c | 9 +++---- drivers/char/tpm/tpm.h | 4 +-- drivers/char/tpm/tpm1-cmd.c | 4 ++- drivers/char/tpm/tpm2-cmd.c | 45 ++++++++++++++++++++++++-------- include/linux/tpm.h | 6 +++++ 5 files changed, 49 insertions(+), 19 deletions(-) diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index 04aa39432f58..f0e1456440d7 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -465,7 +465,7 @@ int tpm_pcr_read(struct tpm_chip *chip, u32 pcr_idx, return -ENODEV; if (chip->flags & TPM_CHIP_FLAG_TPM2) - rc = tpm2_pcr_read(chip, pcr_idx, digest_struct); + rc = tpm2_pcr_read(chip, pcr_idx, digest_struct, NULL); else rc = tpm1_pcr_read(chip, pcr_idx, digest_struct->digest); @@ -480,9 +480,8 @@ EXPORT_SYMBOL_GPL(tpm_pcr_read); * @pcr_idx: the PCR to be retrieved * @hash: the hash value used to extend the PCR value * - * Note: with TPM 2.0 extends also those banks with a known digest size to the - * cryto subsystem in order to prevent malicious use of those PCR banks. In the - * future we should dynamically determine digest sizes. + * Note: with TPM 2.0 extends also those banks for which no digest was + * specified in order to prevent malicious use of those PCR banks. * * Return: same as with tpm_transmit_cmd() */ @@ -503,7 +502,7 @@ int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, const u8 *hash) return -ENOMEM; for (i = 0; i < chip->nr_allocated_banks; i++) { - digest_list[i].alg_id = chip->allocated_banks[i]; + digest_list[i].alg_id = chip->allocated_banks[i].alg_id; memcpy(digest_list[i].digest, hash, TPM_DIGEST_SIZE); } diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index 33b293da69d6..023ddf42038b 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -247,7 +247,7 @@ struct tpm_chip { unsigned int groups_cnt; u32 nr_allocated_banks; - u16 *allocated_banks; + struct tpm_bank_info *allocated_banks; #ifdef CONFIG_ACPI acpi_handle acpi_dev_handle; char ppi_version[TPM_PPI_VERSION_LEN + 1]; @@ -549,7 +549,7 @@ static inline u32 tpm2_rc_value(u32 rc) int tpm2_get_timeouts(struct tpm_chip *chip); int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx, - struct tpm_digest *digest_struct); + struct tpm_digest *digest_struct, u16 *digest_size_ptr); int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, u32 count, struct tpm_digest *digests); int tpm2_get_random(struct tpm_chip *chip, u8 *dest, size_t max); diff --git a/drivers/char/tpm/tpm1-cmd.c b/drivers/char/tpm/tpm1-cmd.c index ec4f197bae0a..8b70a7f884a7 100644 --- a/drivers/char/tpm/tpm1-cmd.c +++ b/drivers/char/tpm/tpm1-cmd.c @@ -716,7 +716,9 @@ int tpm1_auto_startup(struct tpm_chip *chip) goto out; } - chip->allocated_banks[0] = TPM_ALG_SHA1; + chip->allocated_banks[0].alg_id = TPM_ALG_SHA1; + chip->allocated_banks[0].digest_size = hash_digest_size[HASH_ALGO_SHA1]; + chip->allocated_banks[0].crypto_id = HASH_ALGO_SHA1; chip->nr_allocated_banks = 1; return rc; diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index 0d72c2f98bd6..acaaab72ef2e 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -172,11 +172,12 @@ struct tpm2_pcr_read_out { * @chip: TPM chip to use. * @pcr_idx: index of the PCR to read. * @digest_struct: PCR bank and buffer current PCR value is written to. + * @digest_size_ptr: pointer to variable that stores the digest size. * * Return: Same as with tpm_transmit_cmd. */ int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx, - struct tpm_digest *digest_struct) + struct tpm_digest *digest_struct, u16 *digest_size_ptr) { int rc; struct tpm_buf buf; @@ -211,6 +212,9 @@ int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx, goto out; } + if (digest_size_ptr) + *digest_size_ptr = digest_size; + memcpy(digest_struct->digest, out->digest, digest_size); out: tpm_buf_destroy(&buf); @@ -241,7 +245,6 @@ int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, u32 count, struct tpm2_null_auth_area auth_area; int rc; int i; - int j; if (count > chip->nr_allocated_banks) return -EINVAL; @@ -263,14 +266,9 @@ int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, u32 count, tpm_buf_append_u32(&buf, count); for (i = 0; i < count; i++) { - for (j = 0; j < ARRAY_SIZE(tpm2_hash_map); j++) { - if (digests[i].alg_id != tpm2_hash_map[j].tpm_id) - continue; - tpm_buf_append_u16(&buf, digests[i].alg_id); - tpm_buf_append(&buf, (const unsigned char - *)&digests[i].digest, - hash_digest_size[tpm2_hash_map[j].crypto_id]); - } + tpm_buf_append_u16(&buf, digests[i].alg_id); + tpm_buf_append(&buf, (const unsigned char *)&digests[i].digest, + chip->allocated_banks[i].digest_size); } rc = tpm_transmit_cmd(chip, NULL, buf.data, PAGE_SIZE, 0, 0, @@ -821,6 +819,26 @@ int tpm2_probe(struct tpm_chip *chip) } EXPORT_SYMBOL_GPL(tpm2_probe); +static int tpm2_init_bank_info(struct tpm_chip *chip, u32 bank_index) +{ + struct tpm_bank_info *bank = chip->allocated_banks + bank_index; + struct tpm_digest digest = { .alg_id = bank->alg_id }; + int i; + + for (i = 0; i < ARRAY_SIZE(tpm2_hash_map); i++) { + enum hash_algo crypto_algo = tpm2_hash_map[i].crypto_id; + + if (bank->alg_id != tpm2_hash_map[i].tpm_id) + continue; + + bank->digest_size = hash_digest_size[crypto_algo]; + bank->crypto_id = crypto_algo; + return 0; + } + + return tpm2_pcr_read(chip, 0, &digest, &bank->digest_size); +} + struct tpm2_pcr_selection { __be16 hash_alg; u8 size_of_select; @@ -888,7 +906,12 @@ static ssize_t tpm2_get_pcr_allocation(struct tpm_chip *chip) break; if (j < pcr_selection.size_of_select) { - chip->allocated_banks[nr_alloc_banks] = hash_alg; + chip->allocated_banks[nr_alloc_banks].alg_id = hash_alg; + + rc = tpm2_init_bank_info(chip, nr_alloc_banks); + if (rc < 0) + break; + nr_alloc_banks++; } diff --git a/include/linux/tpm.h b/include/linux/tpm.h index 077fd31783ad..fcdd33ae9969 100644 --- a/include/linux/tpm.h +++ b/include/linux/tpm.h @@ -46,6 +46,12 @@ struct tpm_digest { u8 digest[SHA512_DIGEST_SIZE]; } __packed; +struct tpm_bank_info { + u16 alg_id; + u16 digest_size; + u16 crypto_id; +}; + enum TPM_OPS_FLAGS { TPM_OPS_AUTO_STARTUP = BIT(0), }; From patchwork Wed Nov 14 15:31:07 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 10682805 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7640E14BA for ; Wed, 14 Nov 2018 15:36:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 69B8328703 for ; Wed, 14 Nov 2018 15:36:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5E68228891; Wed, 14 Nov 2018 15:36:53 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1213E28703 for ; Wed, 14 Nov 2018 15:36:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733233AbeKOBka (ORCPT ); Wed, 14 Nov 2018 20:40:30 -0500 Received: from lhrrgout.huawei.com ([185.176.76.210]:32770 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727731AbeKOBka (ORCPT ); Wed, 14 Nov 2018 20:40:30 -0500 Received: from LHREML714-CAH.china.huawei.com (unknown [172.18.7.107]) by Forcepoint Email with ESMTP id 780692FF2BF5; Wed, 14 Nov 2018 15:36:43 +0000 (GMT) Received: from roberto-HP-EliteDesk-800-G2-DM-65W.huawei.com (10.204.65.153) by smtpsuk.huawei.com (10.201.108.37) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 14 Nov 2018 15:36:39 +0000 From: Roberto Sassu To: , , , CC: , , , , Roberto Sassu , Subject: [PATCH v5 6/7] tpm: ensure that the output of PCR read contains the correct digest size Date: Wed, 14 Nov 2018 16:31:07 +0100 Message-ID: <20181114153108.12907-7-roberto.sassu@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181114153108.12907-1-roberto.sassu@huawei.com> References: <20181114153108.12907-1-roberto.sassu@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.204.65.153] X-CFilter-Loop: Reflected Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP This patch protects against data corruption that could happen in the bus, by checking that that the digest size returned by the TPM during a PCR read matches the size of the algorithm passed to tpm2_pcr_read(). This check is performed after information about the PCR banks has been retrieved. Signed-off-by: Roberto Sassu Reviewed-by: Jarkko Sakkinen Cc: stable@vger.kernel.org --- drivers/char/tpm/tpm2-cmd.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index acaaab72ef2e..974465f04b78 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -179,15 +179,29 @@ struct tpm2_pcr_read_out { int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx, struct tpm_digest *digest_struct, u16 *digest_size_ptr) { + int i; int rc; struct tpm_buf buf; struct tpm2_pcr_read_out *out; u8 pcr_select[TPM2_PCR_SELECT_MIN] = {0}; u16 digest_size; + u16 expected_digest_size = 0; if (pcr_idx >= TPM2_PLATFORM_PCR) return -EINVAL; + if (!digest_size_ptr) { + for (i = 0; i < chip->nr_allocated_banks && + chip->allocated_banks[i].alg_id != digest_struct->alg_id; + i++) + ; + + if (i == chip->nr_allocated_banks) + return -EINVAL; + + expected_digest_size = chip->allocated_banks[i].digest_size; + } + rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_PCR_READ); if (rc) return rc; @@ -207,7 +221,8 @@ int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx, out = (struct tpm2_pcr_read_out *)&buf.data[TPM_HEADER_SIZE]; digest_size = be16_to_cpu(out->digest_size); - if (digest_size > sizeof(digest_struct->digest)) { + if (digest_size > sizeof(digest_struct->digest) || + (!digest_size_ptr && digest_size != expected_digest_size)) { rc = -EINVAL; goto out; } From patchwork Wed Nov 14 15:31:08 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 10682809 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 049BB14BA for ; Wed, 14 Nov 2018 15:37:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EC577289AB for ; Wed, 14 Nov 2018 15:37:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E05932B61E; Wed, 14 Nov 2018 15:37:24 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 28553289AB for ; Wed, 14 Nov 2018 15:37:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387456AbeKOBlB (ORCPT ); Wed, 14 Nov 2018 20:41:01 -0500 Received: from lhrrgout.huawei.com ([185.176.76.210]:32771 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727731AbeKOBlB (ORCPT ); Wed, 14 Nov 2018 20:41:01 -0500 Received: from LHREML714-CAH.china.huawei.com (unknown [172.18.7.107]) by Forcepoint Email with ESMTP id E513C1EAA5364; Wed, 14 Nov 2018 15:37:13 +0000 (GMT) Received: from roberto-HP-EliteDesk-800-G2-DM-65W.huawei.com (10.204.65.153) by smtpsuk.huawei.com (10.201.108.37) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 14 Nov 2018 15:37:09 +0000 From: Roberto Sassu To: , , , CC: , , , , Roberto Sassu Subject: [PATCH v5 7/7] tpm: pass an array of tpm_bank_list structures to tpm_pcr_extend() Date: Wed, 14 Nov 2018 16:31:08 +0100 Message-ID: <20181114153108.12907-8-roberto.sassu@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181114153108.12907-1-roberto.sassu@huawei.com> References: <20181114153108.12907-1-roberto.sassu@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.204.65.153] X-CFilter-Loop: Reflected Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP Currently, tpm_pcr_extend() accepts as an input only a SHA1 digest. This patch modifies the definition of tpm_pcr_extend() to allow other kernel subsystems to pass a digest for each algorithm supported by the TPM. All digests are processed by the TPM in one operation. If a tpm_pcr_extend() caller provides a subset of the supported algorithms, the TPM driver extends the remaining PCR banks with the first digest passed as an argument to the function. The new tpm_bank_list structure has been preferred to the tpm_digest structure, to let the caller specify the size of the digest (which may be unknown to the TPM driver). Due to the API change, ima_pcr_extend() and pcrlock() have been modified. Signed-off-by: Roberto Sassu --- drivers/char/tpm/tpm-interface.c | 24 +++++--------------- drivers/char/tpm/tpm.h | 6 ++--- drivers/char/tpm/tpm1-cmd.c | 14 ++++++++---- drivers/char/tpm/tpm2-cmd.c | 36 +++++++++++++++++++++--------- include/linux/tpm.h | 13 ++++++++--- security/integrity/ima/ima_queue.c | 5 ++++- security/keys/trusted.c | 5 ++++- 7 files changed, 63 insertions(+), 40 deletions(-) diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index f0e1456440d7..5495223d3f7b 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -478,42 +478,30 @@ EXPORT_SYMBOL_GPL(tpm_pcr_read); * tpm_pcr_extend - extend a PCR value in SHA1 bank. * @chip: a &struct tpm_chip instance, %NULL for the default chip * @pcr_idx: the PCR to be retrieved - * @hash: the hash value used to extend the PCR value + * @count: number of tpm_bank_list structures + * @bank_list: array of tpm_bank_list structures used to extend the PCR value * * Note: with TPM 2.0 extends also those banks for which no digest was * specified in order to prevent malicious use of those PCR banks. * * Return: same as with tpm_transmit_cmd() */ -int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, const u8 *hash) +int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, u32 count, + const struct tpm_bank_list *bank_list) { int rc; - struct tpm_digest *digest_list; - int i; chip = tpm_find_get_ops(chip); if (!chip) return -ENODEV; if (chip->flags & TPM_CHIP_FLAG_TPM2) { - digest_list = kcalloc(chip->nr_allocated_banks, - sizeof(*digest_list), GFP_KERNEL); - if (!digest_list) - return -ENOMEM; - - for (i = 0; i < chip->nr_allocated_banks; i++) { - digest_list[i].alg_id = chip->allocated_banks[i].alg_id; - memcpy(digest_list[i].digest, hash, TPM_DIGEST_SIZE); - } - - rc = tpm2_pcr_extend(chip, pcr_idx, chip->nr_allocated_banks, - digest_list); - kfree(digest_list); + rc = tpm2_pcr_extend(chip, pcr_idx, count, bank_list); tpm_put_ops(chip); return rc; } - rc = tpm1_pcr_extend(chip, pcr_idx, hash, + rc = tpm1_pcr_extend(chip, pcr_idx, count, bank_list, "attempting extend a PCR value"); tpm_put_ops(chip); return rc; diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index 023ddf42038b..4296c720ebb4 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -504,8 +504,8 @@ int tpm1_auto_startup(struct tpm_chip *chip); int tpm1_do_selftest(struct tpm_chip *chip); int tpm1_get_timeouts(struct tpm_chip *chip); unsigned long tpm1_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal); -int tpm1_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, const u8 *hash, - const char *log_msg); +int tpm1_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, u32 count, + const struct tpm_bank_list *bank_list, const char *log_msg); int tpm1_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf); ssize_t tpm1_getcap(struct tpm_chip *chip, u32 subcap_id, cap_t *cap, const char *desc, size_t min_cap_length); @@ -551,7 +551,7 @@ int tpm2_get_timeouts(struct tpm_chip *chip); int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx, struct tpm_digest *digest_struct, u16 *digest_size_ptr); int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, u32 count, - struct tpm_digest *digests); + const struct tpm_bank_list *bank_list); int tpm2_get_random(struct tpm_chip *chip, u8 *dest, size_t max); void tpm2_flush_context_cmd(struct tpm_chip *chip, u32 handle, unsigned int flags); diff --git a/drivers/char/tpm/tpm1-cmd.c b/drivers/char/tpm/tpm1-cmd.c index 8b70a7f884a7..439ac749517c 100644 --- a/drivers/char/tpm/tpm1-cmd.c +++ b/drivers/char/tpm/tpm1-cmd.c @@ -449,12 +449,19 @@ int tpm1_get_timeouts(struct tpm_chip *chip) } #define TPM_ORD_PCR_EXTEND 20 -int tpm1_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, const u8 *hash, - const char *log_msg) +int tpm1_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, u32 count, + const struct tpm_bank_list *bank_list, const char *log_msg) { struct tpm_buf buf; + u8 dummy_hash[TPM_DIGEST_SIZE] = { 0 }; + const u8 *hash; int rc; + hash = dummy_hash; + if (count) + memcpy(dummy_hash, bank_list[0].extend_array, + min(bank_list[0].digest_size, (u16)sizeof(dummy_hash))); + rc = tpm_buf_init(&buf, TPM_TAG_RQU_COMMAND, TPM_ORD_PCR_EXTEND); if (rc) return rc; @@ -743,7 +750,6 @@ int tpm1_auto_startup(struct tpm_chip *chip) */ int tpm1_pm_suspend(struct tpm_chip *chip, u32 tpm_suspend_pcr) { - u8 dummy_hash[TPM_DIGEST_SIZE] = { 0 }; struct tpm_buf buf; unsigned int try; int rc; @@ -751,7 +757,7 @@ int tpm1_pm_suspend(struct tpm_chip *chip, u32 tpm_suspend_pcr) /* for buggy tpm, flush pcrs with extend to selected dummy */ if (tpm_suspend_pcr) - rc = tpm1_pcr_extend(chip, tpm_suspend_pcr, dummy_hash, + rc = tpm1_pcr_extend(chip, tpm_suspend_pcr, 0, NULL, "extending dummy pcr before suspend"); rc = tpm_buf_init(&buf, TPM_TAG_RQU_COMMAND, TPM_ORD_SAVESTATE); diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index 974465f04b78..40eb1a044451 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -248,21 +248,22 @@ struct tpm2_null_auth_area { * * @chip: TPM chip to use. * @pcr_idx: index of the PCR. - * @count: number of digests passed. - * @digests: list of pcr banks and corresponding digest values to extend. + * @count: number of tpm_bank_list passed. + * @bank_list: array of tpm_bank_list with digest values to extend. * * Return: Same as with tpm_transmit_cmd. */ int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, u32 count, - struct tpm_digest *digests) + const struct tpm_bank_list *bank_list) { struct tpm_buf buf; struct tpm2_null_auth_area auth_area; + const struct tpm_bank_list *item; + u8 dummy_hash[SHA512_DIGEST_SIZE] = { 0 }; + const u8 *hash; int rc; int i; - - if (count > chip->nr_allocated_banks) - return -EINVAL; + int j; rc = tpm_buf_init(&buf, TPM2_ST_SESSIONS, TPM2_CC_PCR_EXTEND); if (rc) @@ -278,11 +279,26 @@ int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, u32 count, tpm_buf_append_u32(&buf, sizeof(struct tpm2_null_auth_area)); tpm_buf_append(&buf, (const unsigned char *)&auth_area, sizeof(auth_area)); - tpm_buf_append_u32(&buf, count); + tpm_buf_append_u32(&buf, chip->nr_allocated_banks); + + if (count) + memcpy(dummy_hash, bank_list[0].extend_array, + bank_list[0].digest_size); + + for (i = 0; i < chip->nr_allocated_banks; i++) { + tpm_buf_append_u16(&buf, chip->allocated_banks[i].alg_id); + + hash = dummy_hash; + for (j = 0; j < count; j++) { + item = bank_list + j; + + if (item->alg_id == chip->allocated_banks[i].alg_id) { + hash = item->extend_array; + break; + } + } - for (i = 0; i < count; i++) { - tpm_buf_append_u16(&buf, digests[i].alg_id); - tpm_buf_append(&buf, (const unsigned char *)&digests[i].digest, + tpm_buf_append(&buf, hash, chip->allocated_banks[i].digest_size); } diff --git a/include/linux/tpm.h b/include/linux/tpm.h index fcdd33ae9969..16e5ff1f0294 100644 --- a/include/linux/tpm.h +++ b/include/linux/tpm.h @@ -52,6 +52,12 @@ struct tpm_bank_info { u16 crypto_id; }; +struct tpm_bank_list { + u8 alg_id; + u16 digest_size; + const u8 *extend_array; +}; + enum TPM_OPS_FLAGS { TPM_OPS_AUTO_STARTUP = BIT(0), }; @@ -79,7 +85,8 @@ struct tpm_class_ops { extern int tpm_is_tpm2(struct tpm_chip *chip); extern int tpm_pcr_read(struct tpm_chip *chip, u32 pcr_idx, struct tpm_digest *digest_struct); -extern int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, const u8 *hash); +extern int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, u32 count, + const struct tpm_bank_list *bank_list); extern int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen); extern int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max); extern int tpm_seal_trusted(struct tpm_chip *chip, @@ -101,8 +108,8 @@ static inline int tpm_pcr_read(struct tpm_chip *chip, int pcr_idx, return -ENODEV; } -static inline int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, - const u8 *hash) +static inline int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, u32 count, + const struct tpm_bank_list *bank_list) { return -ENODEV; } diff --git a/security/integrity/ima/ima_queue.c b/security/integrity/ima/ima_queue.c index b186819bd5aa..24024edef316 100644 --- a/security/integrity/ima/ima_queue.c +++ b/security/integrity/ima/ima_queue.c @@ -140,12 +140,15 @@ unsigned long ima_get_binary_runtime_size(void) static int ima_pcr_extend(const u8 *hash, int pcr) { + struct tpm_bank_list bank_item = { .alg_id = TPM_ALG_SHA1, + .digest_size = TPM_DIGEST_SIZE, + .extend_array = hash }; int result = 0; if (!ima_tpm_chip) return result; - result = tpm_pcr_extend(ima_tpm_chip, pcr, hash); + result = tpm_pcr_extend(ima_tpm_chip, pcr, 1, &bank_item); if (result != 0) pr_err("Error Communicating to TPM chip, result: %d\n", result); return result; diff --git a/security/keys/trusted.c b/security/keys/trusted.c index ff6789365a12..d2a3129a95f9 100644 --- a/security/keys/trusted.c +++ b/security/keys/trusted.c @@ -380,6 +380,9 @@ EXPORT_SYMBOL_GPL(trusted_tpm_send); static int pcrlock(const int pcrnum) { unsigned char hash[SHA1_DIGEST_SIZE]; + struct tpm_bank_list bank_item = { .alg_id = TPM_ALG_SHA1, + .digest_size = sizeof(hash), + .extend_array = hash } int ret; if (!capable(CAP_SYS_ADMIN)) @@ -387,7 +390,7 @@ static int pcrlock(const int pcrnum) ret = tpm_get_random(NULL, hash, SHA1_DIGEST_SIZE); if (ret != SHA1_DIGEST_SIZE) return ret; - return tpm_pcr_extend(NULL, pcrnum, hash) ? -EINVAL : 0; + return tpm_pcr_extend(NULL, pcrnum, 1, &bank_item) ? -EINVAL : 0; } /*