From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roberto Sassu Subject: [PATCH v3 4/6] tpm: replace TPM algorithms IDs with tpm_pcr_bank_info structs in tpm_chip Date: Wed, 21 Jun 2017 16:29:39 +0200 Message-ID: <20170621142941.32674-5-roberto.sassu@huawei.com> References: <20170621142941.32674-1-roberto.sassu@huawei.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <20170621142941.32674-1-roberto.sassu@huawei.com> Sender: linux-kernel-owner@vger.kernel.org To: tpmdd-devel@lists.sourceforge.net Cc: linux-ima-devel@lists.sourceforge.net, linux-security-module@vger.kernel.org, keyrings@vger.kernel.org, linux-kernel@vger.kernel.org, Roberto Sassu List-Id: tpmdd-devel@lists.sourceforge.net This patch replaces the array of TPM algorithms ID, stored in the tpm_chip structure, with an array of the new structure tpm_pcr_bank_info. The array is initialized during the execution of tpm2_get_pcr_allocation(), by tpm2_init_pcr_bank_info(). tpm2_pcr_extend() and tpm_pcr_extend() have been modified to use the digest size retrieved from the TPM instead of that from the crypto subsystem. Signed-off-by: Roberto Sassu --- drivers/char/tpm/tpm-interface.c | 4 ++-- drivers/char/tpm/tpm.h | 2 +- drivers/char/tpm/tpm2-cmd.c | 22 +++++++++++----------- 3 files changed, 14 insertions(+), 14 deletions(-) diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index d2b4df6..a11598a 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -897,8 +897,8 @@ int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) memset(digest_list, 0, sizeof(digest_list)); 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]; + chip->active_banks[i].alg_id != TPM2_ALG_ERROR; i++) { + digest_list[i].alg_id = chip->active_banks[i].alg_id; memcpy(digest_list[i].digest, hash, TPM_DIGEST_SIZE); count++; } diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index 62c600d..d285bc6 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -208,7 +208,7 @@ struct tpm_chip { const struct attribute_group *groups[3]; unsigned int groups_cnt; - u16 active_banks[7]; + struct tpm_pcr_bank_info active_banks[7]; #ifdef CONFIG_ACPI acpi_handle acpi_dev_handle; char ppi_version[TPM_PPI_VERSION_LEN + 1]; diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index 74a68ea..7bd2cf7 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -301,7 +301,6 @@ int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, u32 count, struct tpm2_null_auth_area auth_area; int rc; int i; - int j; if (count > ARRAY_SIZE(chip->active_banks)) return -EINVAL; @@ -323,14 +322,10 @@ int tpm2_pcr_extend(struct tpm_chip *chip, int 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]); - } + /* digests[i].alg_id == chip->active_banks[i].alg_id */ + tpm_buf_append_u16(&buf, digests[i].alg_id); + tpm_buf_append(&buf, (const unsigned char *)&digests[i].digest, + chip->active_banks[i].digest_size); } rc = tpm_transmit_cmd(chip, NULL, buf.data, PAGE_SIZE, 0, 0, @@ -1076,7 +1071,12 @@ 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); + rc = tpm2_init_pcr_bank_info(chip, + be16_to_cpu(pcr_selection.hash_alg), + &chip->active_banks[i]); + if (rc) + break; + sizeof_pcr_selection = sizeof(pcr_selection.hash_alg) + sizeof(pcr_selection.size_of_select) + pcr_selection.size_of_select; @@ -1085,7 +1085,7 @@ static ssize_t tpm2_get_pcr_allocation(struct tpm_chip *chip) out: if (i < ARRAY_SIZE(chip->active_banks)) - chip->active_banks[i] = TPM2_ALG_ERROR; + chip->active_banks[i].alg_id = TPM2_ALG_ERROR; tpm_buf_destroy(&buf); -- 2.9.3