diff options
Diffstat (limited to 'lib/tpm-v2.c')
| -rw-r--r-- | lib/tpm-v2.c | 814 |
1 files changed, 814 insertions, 0 deletions
diff --git a/lib/tpm-v2.c b/lib/tpm-v2.c index 9ab5b46..bd0fb07 100644 --- a/lib/tpm-v2.c +++ b/lib/tpm-v2.c @@ -1,16 +1,705 @@ // SPDX-License-Identifier: GPL-2.0+ /* + * Copyright (c) 2023 Linaro Limited * Copyright (c) 2018 Bootlin * Author: Miquel Raynal <miquel.raynal@bootlin.com> */ #include <common.h> #include <dm.h> +#include <dm/of_access.h> +#include <tpm_api.h> #include <tpm-common.h> #include <tpm-v2.h> +#include <u-boot/sha1.h> +#include <u-boot/sha256.h> +#include <u-boot/sha512.h> +#include <version_string.h> +#include <asm/io.h> #include <linux/bitops.h> +#include <linux/unaligned/be_byteshift.h> +#include <linux/unaligned/generic.h> +#include <linux/unaligned/le_byteshift.h> + #include "tpm-utils.h" +const enum tpm2_algorithms tpm2_supported_algorithms[4] = { + TPM2_ALG_SHA1, + TPM2_ALG_SHA256, + TPM2_ALG_SHA384, + TPM2_ALG_SHA512, +}; + +int tcg2_get_active_pcr_banks(struct udevice *dev, u32 *active_pcr_banks) +{ + u32 supported = 0; + u32 pcr_banks = 0; + u32 active = 0; + int rc; + + rc = tpm2_get_pcr_info(dev, &supported, &active, &pcr_banks); + if (rc) + return rc; + + *active_pcr_banks = active; + + return 0; +} + +u32 tcg2_event_get_size(struct tpml_digest_values *digest_list) +{ + u32 len; + size_t i; + + len = offsetof(struct tcg_pcr_event2, digests); + len += offsetof(struct tpml_digest_values, digests); + for (i = 0; i < digest_list->count; ++i) { + u16 l = tpm2_algorithm_to_len(digest_list->digests[i].hash_alg); + + if (!l) + continue; + + len += l + offsetof(struct tpmt_ha, digest); + } + len += sizeof(u32); + + return len; +} + +int tcg2_create_digest(struct udevice *dev, const u8 *input, u32 length, + struct tpml_digest_values *digest_list) +{ + u8 final[sizeof(union tpmu_ha)]; + sha256_context ctx_256; + sha512_context ctx_512; + sha1_context ctx; + u32 active; + size_t i; + u32 len; + int rc; + + rc = tcg2_get_active_pcr_banks(dev, &active); + if (rc) + return rc; + + digest_list->count = 0; + for (i = 0; i < ARRAY_SIZE(tpm2_supported_algorithms); ++i) { + u32 mask = + tpm2_algorithm_to_mask(tpm2_supported_algorithms[i]); + + if (!(active & mask)) + continue; + + switch (tpm2_supported_algorithms[i]) { + case TPM2_ALG_SHA1: + sha1_starts(&ctx); + sha1_update(&ctx, input, length); + sha1_finish(&ctx, final); + len = TPM2_SHA1_DIGEST_SIZE; + break; + case TPM2_ALG_SHA256: + sha256_starts(&ctx_256); + sha256_update(&ctx_256, input, length); + sha256_finish(&ctx_256, final); + len = TPM2_SHA256_DIGEST_SIZE; + break; + case TPM2_ALG_SHA384: + sha384_starts(&ctx_512); + sha384_update(&ctx_512, input, length); + sha384_finish(&ctx_512, final); + len = TPM2_SHA384_DIGEST_SIZE; + break; + case TPM2_ALG_SHA512: + sha512_starts(&ctx_512); + sha512_update(&ctx_512, input, length); + sha512_finish(&ctx_512, final); + len = TPM2_SHA512_DIGEST_SIZE; + break; + default: + printf("%s: unsupported algorithm %x\n", __func__, + tpm2_supported_algorithms[i]); + continue; + } + + digest_list->digests[digest_list->count].hash_alg = + tpm2_supported_algorithms[i]; + memcpy(&digest_list->digests[digest_list->count].digest, final, + len); + digest_list->count++; + } + + return 0; +} + +void tcg2_log_append(u32 pcr_index, u32 event_type, + struct tpml_digest_values *digest_list, u32 size, + const u8 *event, u8 *log) +{ + size_t len; + size_t pos; + u32 i; + + pos = offsetof(struct tcg_pcr_event2, pcr_index); + put_unaligned_le32(pcr_index, log); + pos = offsetof(struct tcg_pcr_event2, event_type); + put_unaligned_le32(event_type, log + pos); + pos = offsetof(struct tcg_pcr_event2, digests) + + offsetof(struct tpml_digest_values, count); + put_unaligned_le32(digest_list->count, log + pos); + + pos = offsetof(struct tcg_pcr_event2, digests) + + offsetof(struct tpml_digest_values, digests); + for (i = 0; i < digest_list->count; ++i) { + u16 hash_alg = digest_list->digests[i].hash_alg; + + len = tpm2_algorithm_to_len(hash_alg); + if (!len) + continue; + + pos += offsetof(struct tpmt_ha, hash_alg); + put_unaligned_le16(hash_alg, log + pos); + pos += offsetof(struct tpmt_ha, digest); + memcpy(log + pos, (u8 *)&digest_list->digests[i].digest, len); + pos += len; + } + + put_unaligned_le32(size, log + pos); + pos += sizeof(u32); + memcpy(log + pos, event, size); +} + +static int tcg2_log_append_check(struct tcg2_event_log *elog, u32 pcr_index, + u32 event_type, + struct tpml_digest_values *digest_list, + u32 size, const u8 *event) +{ + u32 event_size; + u8 *log; + + event_size = size + tcg2_event_get_size(digest_list); + if (elog->log_position + event_size > elog->log_size) { + printf("%s: log too large: %u + %u > %u\n", __func__, + elog->log_position, event_size, elog->log_size); + return -ENOBUFS; + } + + log = elog->log + elog->log_position; + elog->log_position += event_size; + + tcg2_log_append(pcr_index, event_type, digest_list, size, event, log); + + return 0; +} + +static int tcg2_log_init(struct udevice *dev, struct tcg2_event_log *elog) +{ + struct tcg_efi_spec_id_event *ev; + struct tcg_pcr_event *log; + u32 event_size; + u32 count = 0; + u32 log_size; + u32 active; + u32 mask; + size_t i; + u16 len; + int rc; + + rc = tcg2_get_active_pcr_banks(dev, &active); + if (rc) + return rc; + + event_size = offsetof(struct tcg_efi_spec_id_event, digest_sizes); + for (i = 0; i < ARRAY_SIZE(tpm2_supported_algorithms); ++i) { + mask = tpm2_algorithm_to_mask(tpm2_supported_algorithms[i]); + + if (!(active & mask)) + continue; + + switch (tpm2_supported_algorithms[i]) { + case TPM2_ALG_SHA1: + case TPM2_ALG_SHA256: + case TPM2_ALG_SHA384: + case TPM2_ALG_SHA512: + count++; + break; + default: + continue; + } + } + + event_size += 1 + + (sizeof(struct tcg_efi_spec_id_event_algorithm_size) * count); + log_size = offsetof(struct tcg_pcr_event, event) + event_size; + + if (log_size > elog->log_size) { + printf("%s: log too large: %u > %u\n", __func__, log_size, + elog->log_size); + return -ENOBUFS; + } + + log = (struct tcg_pcr_event *)elog->log; + put_unaligned_le32(0, &log->pcr_index); + put_unaligned_le32(EV_NO_ACTION, &log->event_type); + memset(&log->digest, 0, sizeof(log->digest)); + put_unaligned_le32(event_size, &log->event_size); + + ev = (struct tcg_efi_spec_id_event *)log->event; + strlcpy((char *)ev->signature, TCG_EFI_SPEC_ID_EVENT_SIGNATURE_03, + sizeof(ev->signature)); + put_unaligned_le32(0, &ev->platform_class); + ev->spec_version_minor = TCG_EFI_SPEC_ID_EVENT_SPEC_VERSION_MINOR_TPM2; + ev->spec_version_major = TCG_EFI_SPEC_ID_EVENT_SPEC_VERSION_MAJOR_TPM2; + ev->spec_errata = TCG_EFI_SPEC_ID_EVENT_SPEC_VERSION_ERRATA_TPM2; + ev->uintn_size = sizeof(size_t) / sizeof(u32); + put_unaligned_le32(count, &ev->number_of_algorithms); + + count = 0; + for (i = 0; i < ARRAY_SIZE(tpm2_supported_algorithms); ++i) { + mask = tpm2_algorithm_to_mask(tpm2_supported_algorithms[i]); + + if (!(active & mask)) + continue; + + len = tpm2_algorithm_to_len(tpm2_supported_algorithms[i]); + if (!len) + continue; + + put_unaligned_le16(tpm2_supported_algorithms[i], + &ev->digest_sizes[count].algorithm_id); + put_unaligned_le16(len, &ev->digest_sizes[count].digest_size); + count++; + } + + *((u8 *)ev + (event_size - 1)) = 0; + elog->log_position = log_size; + + return 0; +} + +static int tcg2_replay_eventlog(struct tcg2_event_log *elog, + struct udevice *dev, + struct tpml_digest_values *digest_list, + u32 log_position) +{ + const u32 offset = offsetof(struct tcg_pcr_event2, digests) + + offsetof(struct tpml_digest_values, digests); + u32 event_size; + u32 count; + u16 algo; + u32 pcr; + u32 pos; + u16 len; + u8 *log; + int rc; + u32 i; + + while (log_position + offset < elog->log_size) { + log = elog->log + log_position; + + pos = offsetof(struct tcg_pcr_event2, pcr_index); + pcr = get_unaligned_le32(log + pos); + pos = offsetof(struct tcg_pcr_event2, event_type); + if (!get_unaligned_le32(log + pos)) + return 0; + + pos = offsetof(struct tcg_pcr_event2, digests) + + offsetof(struct tpml_digest_values, count); + count = get_unaligned_le32(log + pos); + if (count > ARRAY_SIZE(tpm2_supported_algorithms) || + (digest_list->count && digest_list->count != count)) + return 0; + + pos = offsetof(struct tcg_pcr_event2, digests) + + offsetof(struct tpml_digest_values, digests); + for (i = 0; i < count; ++i) { + pos += offsetof(struct tpmt_ha, hash_alg); + if (log_position + pos + sizeof(u16) >= elog->log_size) + return 0; + + algo = get_unaligned_le16(log + pos); + pos += offsetof(struct tpmt_ha, digest); + switch (algo) { + case TPM2_ALG_SHA1: + case TPM2_ALG_SHA256: + case TPM2_ALG_SHA384: + case TPM2_ALG_SHA512: + len = tpm2_algorithm_to_len(algo); + break; + default: + return 0; + } + + if (digest_list->count) { + if (algo != digest_list->digests[i].hash_alg || + log_position + pos + len >= elog->log_size) + return 0; + + memcpy(digest_list->digests[i].digest.sha512, + log + pos, len); + } + + pos += len; + } + + if (log_position + pos + sizeof(u32) >= elog->log_size) + return 0; + + event_size = get_unaligned_le32(log + pos); + pos += event_size + sizeof(u32); + if (log_position + pos > elog->log_size) + return 0; + + if (digest_list->count) { + rc = tcg2_pcr_extend(dev, pcr, digest_list); + if (rc) + return rc; + } + + log_position += pos; + } + + elog->log_position = log_position; + elog->found = true; + return 0; +} + +static int tcg2_log_parse(struct udevice *dev, struct tcg2_event_log *elog) +{ + struct tpml_digest_values digest_list; + struct tcg_efi_spec_id_event *event; + struct tcg_pcr_event *log; + u32 log_active; + u32 calc_size; + u32 active; + u32 count; + u32 evsz; + u32 mask; + u16 algo; + u16 len; + int rc; + u32 i; + u16 j; + + if (elog->log_size <= offsetof(struct tcg_pcr_event, event)) + return 0; + + log = (struct tcg_pcr_event *)elog->log; + if (get_unaligned_le32(&log->pcr_index) != 0 || + get_unaligned_le32(&log->event_type) != EV_NO_ACTION) + return 0; + + for (i = 0; i < sizeof(log->digest); i++) { + if (log->digest[i]) + return 0; + } + + evsz = get_unaligned_le32(&log->event_size); + if (evsz < offsetof(struct tcg_efi_spec_id_event, digest_sizes) || + evsz + offsetof(struct tcg_pcr_event, event) > elog->log_size) + return 0; + + event = (struct tcg_efi_spec_id_event *)log->event; + if (memcmp(event->signature, TCG_EFI_SPEC_ID_EVENT_SIGNATURE_03, + sizeof(TCG_EFI_SPEC_ID_EVENT_SIGNATURE_03))) + return 0; + + if (event->spec_version_minor != TCG_EFI_SPEC_ID_EVENT_SPEC_VERSION_MINOR_TPM2 || + event->spec_version_major != TCG_EFI_SPEC_ID_EVENT_SPEC_VERSION_MAJOR_TPM2) + return 0; + + count = get_unaligned_le32(&event->number_of_algorithms); + if (count > ARRAY_SIZE(tpm2_supported_algorithms)) + return 0; + + calc_size = offsetof(struct tcg_efi_spec_id_event, digest_sizes) + + (sizeof(struct tcg_efi_spec_id_event_algorithm_size) * count) + + 1; + if (evsz != calc_size) + return 0; + + rc = tcg2_get_active_pcr_banks(dev, &active); + if (rc) + return rc; + + digest_list.count = 0; + log_active = 0; + + for (i = 0; i < count; ++i) { + algo = get_unaligned_le16(&event->digest_sizes[i].algorithm_id); + mask = tpm2_algorithm_to_mask(algo); + + if (!(active & mask)) + return 0; + + switch (algo) { + case TPM2_ALG_SHA1: + case TPM2_ALG_SHA256: + case TPM2_ALG_SHA384: + case TPM2_ALG_SHA512: + len = get_unaligned_le16(&event->digest_sizes[i].digest_size); + if (tpm2_algorithm_to_len(algo) != len) + return 0; + digest_list.digests[digest_list.count++].hash_alg = algo; + break; + default: + return 0; + } + + log_active |= mask; + } + + /* Ensure the previous firmware extended all the PCRs. */ + if (log_active != active) + return 0; + + /* Read PCR0 to check if previous firmware extended the PCRs or not. */ + rc = tcg2_pcr_read(dev, 0, &digest_list); + if (rc) + return rc; + + for (i = 0; i < digest_list.count; ++i) { + len = tpm2_algorithm_to_len(digest_list.digests[i].hash_alg); + for (j = 0; j < len; ++j) { + if (digest_list.digests[i].digest.sha512[j]) + break; + } + + /* PCR is non-zero; it has been extended, so skip extending. */ + if (j != len) { + digest_list.count = 0; + break; + } + } + + return tcg2_replay_eventlog(elog, dev, &digest_list, + offsetof(struct tcg_pcr_event, event) + + evsz); +} + +int tcg2_pcr_extend(struct udevice *dev, u32 pcr_index, + struct tpml_digest_values *digest_list) +{ + u32 rc; + u32 i; + + for (i = 0; i < digest_list->count; i++) { + u32 alg = digest_list->digests[i].hash_alg; + + rc = tpm2_pcr_extend(dev, pcr_index, alg, + (u8 *)&digest_list->digests[i].digest, + tpm2_algorithm_to_len(alg)); + if (rc) { + printf("%s: error pcr:%u alg:%08x\n", __func__, + pcr_index, alg); + return rc; + } + } + + return 0; +} + +int tcg2_pcr_read(struct udevice *dev, u32 pcr_index, + struct tpml_digest_values *digest_list) +{ + struct tpm_chip_priv *priv; + u32 rc; + u32 i; + + priv = dev_get_uclass_priv(dev); + if (!priv) + return -ENODEV; + + for (i = 0; i < digest_list->count; i++) { + u32 alg = digest_list->digests[i].hash_alg; + u8 *digest = (u8 *)&digest_list->digests[i].digest; + + rc = tpm2_pcr_read(dev, pcr_index, priv->pcr_select_min, alg, + digest, tpm2_algorithm_to_len(alg), NULL); + if (rc) { + printf("%s: error pcr:%u alg:%08x\n", __func__, + pcr_index, alg); + return rc; + } + } + + return 0; +} + +int tcg2_measure_data(struct udevice *dev, struct tcg2_event_log *elog, + u32 pcr_index, u32 size, const u8 *data, u32 event_type, + u32 event_size, const u8 *event) +{ + struct tpml_digest_values digest_list; + int rc; + + if (data) + rc = tcg2_create_digest(dev, data, size, &digest_list); + else + rc = tcg2_create_digest(dev, event, event_size, &digest_list); + if (rc) + return rc; + + rc = tcg2_pcr_extend(dev, pcr_index, &digest_list); + if (rc) + return rc; + + return tcg2_log_append_check(elog, pcr_index, event_type, &digest_list, + event_size, event); +} + +int tcg2_log_prepare_buffer(struct udevice *dev, struct tcg2_event_log *elog, + bool ignore_existing_log) +{ + struct tcg2_event_log log; + int rc; + + elog->log_position = 0; + elog->found = false; + + rc = tcg2_platform_get_log(dev, (void **)&log.log, &log.log_size); + if (!rc) { + log.log_position = 0; + log.found = false; + + if (!ignore_existing_log) { + rc = tcg2_log_parse(dev, &log); + if (rc) + return rc; + } + + if (elog->log_size) { + if (log.found) { + if (elog->log_size < log.log_position) + return -ENOSPC; + + /* + * Copy the discovered log into the user buffer + * if there's enough space. + */ + memcpy(elog->log, log.log, log.log_position); + } + + unmap_physmem(log.log, MAP_NOCACHE); + } else { + elog->log = log.log; + elog->log_size = log.log_size; + } + + elog->log_position = log.log_position; + elog->found = log.found; + } + + /* + * Initialize the log buffer if no log was discovered and the buffer is + * valid. User's can pass in their own buffer as a fallback if no + * memory region is found. + */ + if (!elog->found && elog->log_size) + rc = tcg2_log_init(dev, elog); + + return rc; +} + +int tcg2_measurement_init(struct udevice **dev, struct tcg2_event_log *elog, + bool ignore_existing_log) +{ + int rc; + + rc = tcg2_platform_get_tpm2(dev); + if (rc) + return rc; + + rc = tpm_auto_start(*dev); + if (rc) + return rc; + + rc = tcg2_log_prepare_buffer(*dev, elog, ignore_existing_log); + if (rc) { + tcg2_measurement_term(*dev, elog, true); + return rc; + } + + rc = tcg2_measure_event(*dev, elog, 0, EV_S_CRTM_VERSION, + strlen(version_string) + 1, + (u8 *)version_string); + if (rc) { + tcg2_measurement_term(*dev, elog, true); + return rc; + } + + return 0; +} + +void tcg2_measurement_term(struct udevice *dev, struct tcg2_event_log *elog, + bool error) +{ + u32 event = error ? 0x1 : 0xffffffff; + int i; + + for (i = 0; i < 8; ++i) + tcg2_measure_event(dev, elog, i, EV_SEPARATOR, sizeof(event), + (const u8 *)&event); + + if (elog->log) + unmap_physmem(elog->log, MAP_NOCACHE); +} + +__weak int tcg2_platform_get_log(struct udevice *dev, void **addr, u32 *size) +{ + const __be32 *addr_prop; + const __be32 *size_prop; + int asize; + int ssize; + + *addr = NULL; + *size = 0; + + addr_prop = dev_read_prop(dev, "tpm_event_log_addr", &asize); + if (!addr_prop) + addr_prop = dev_read_prop(dev, "linux,sml-base", &asize); + + size_prop = dev_read_prop(dev, "tpm_event_log_size", &ssize); + if (!size_prop) + size_prop = dev_read_prop(dev, "linux,sml-size", &ssize); + + if (addr_prop && size_prop) { + u64 a = of_read_number(addr_prop, asize / sizeof(__be32)); + u64 s = of_read_number(size_prop, ssize / sizeof(__be32)); + + *addr = map_physmem(a, s, MAP_NOCACHE); + *size = (u32)s; + } else { + struct ofnode_phandle_args args; + phys_addr_t a; + fdt_size_t s; + + if (dev_read_phandle_with_args(dev, "memory-region", NULL, 0, + 0, &args)) + return -ENODEV; + + a = ofnode_get_addr_size(args.node, "reg", &s); + if (a == FDT_ADDR_T_NONE) + return -ENOMEM; + + *addr = map_physmem(a, s, MAP_NOCACHE); + *size = (u32)s; + } + + return 0; +} + +__weak int tcg2_platform_get_tpm2(struct udevice **dev) +{ + for_each_tpm_device(*dev) { + if (tpm_get_version(*dev) == TPM_V2) + return 0; + } + + return -ENODEV; +} + +__weak void tcg2_platform_startup_error(struct udevice *dev, int rc) {} + u32 tpm2_startup(struct udevice *dev, enum tpm2_startup_types mode) { const u8 command_v2[12] = { @@ -359,6 +1048,131 @@ u32 tpm2_get_capability(struct udevice *dev, u32 capability, u32 property, return 0; } +static int tpm2_get_num_pcr(struct udevice *dev, u32 *num_pcr) +{ + u8 response[(sizeof(struct tpms_capability_data) - + offsetof(struct tpms_capability_data, data))]; + u32 properties_offset = + offsetof(struct tpml_tagged_tpm_property, tpm_property) + + offsetof(struct tpms_tagged_property, value); + u32 ret; + + memset(response, 0, sizeof(response)); + ret = tpm2_get_capability(dev, TPM2_CAP_TPM_PROPERTIES, + TPM2_PT_PCR_COUNT, response, 1); + if (ret) + return ret; + + *num_pcr = get_unaligned_be32(response + properties_offset); + if (*num_pcr > TPM2_MAX_PCRS) { + printf("%s: too many pcrs: %u\n", __func__, *num_pcr); + return -E2BIG; + } + + return 0; +} + +static bool tpm2_is_active_pcr(struct tpms_pcr_selection *selection) +{ + int i; + + /* + * check the pcr_select. If at least one of the PCRs supports the + * algorithm add it on the active ones + */ + for (i = 0; i < selection->size_of_select; i++) { + if (selection->pcr_select[i]) + return true; + } + + return false; +} + +int tpm2_get_pcr_info(struct udevice *dev, u32 *supported_pcr, u32 *active_pcr, + u32 *pcr_banks) +{ + u8 response[(sizeof(struct tpms_capability_data) - + offsetof(struct tpms_capability_data, data))]; + struct tpml_pcr_selection pcrs; + u32 num_pcr; + size_t i; + u32 ret; + + *supported_pcr = 0; + *active_pcr = 0; + *pcr_banks = 0; + memset(response, 0, sizeof(response)); + ret = tpm2_get_capability(dev, TPM2_CAP_PCRS, 0, response, 1); + if (ret) + return ret; + + pcrs.count = get_unaligned_be32(response); + /* + * We only support 5 algorithms for now so check against that + * instead of TPM2_NUM_PCR_BANKS + */ + if (pcrs.count > ARRAY_SIZE(tpm2_supported_algorithms) || + pcrs.count < 1) { + printf("%s: too many pcrs: %u\n", __func__, pcrs.count); + return -EMSGSIZE; + } + + ret = tpm2_get_num_pcr(dev, &num_pcr); + if (ret) + return ret; + + for (i = 0; i < pcrs.count; i++) { + /* + * Definition of TPMS_PCR_SELECTION Structure + * hash: u16 + * size_of_select: u8 + * pcr_select: u8 array + * + * The offsets depend on the number of the device PCRs + * so we have to calculate them based on that + */ + u32 hash_offset = offsetof(struct tpml_pcr_selection, selection) + + i * offsetof(struct tpms_pcr_selection, pcr_select) + + i * ((num_pcr + 7) / 8); + u32 size_select_offset = + hash_offset + offsetof(struct tpms_pcr_selection, + size_of_select); + u32 pcr_select_offset = + hash_offset + offsetof(struct tpms_pcr_selection, + pcr_select); + + pcrs.selection[i].hash = + get_unaligned_be16(response + hash_offset); + pcrs.selection[i].size_of_select = + __get_unaligned_be(response + size_select_offset); + if (pcrs.selection[i].size_of_select > TPM2_PCR_SELECT_MAX) { + printf("%s: pcrs selection too large: %u\n", __func__, + pcrs.selection[i].size_of_select); + return -ENOBUFS; + } + /* copy the array of pcr_select */ + memcpy(pcrs.selection[i].pcr_select, response + pcr_select_offset, + pcrs.selection[i].size_of_select); + } + + for (i = 0; i < pcrs.count; i++) { + u32 hash_mask = tpm2_algorithm_to_mask(pcrs.selection[i].hash); + + if (hash_mask) { + *supported_pcr |= hash_mask; + if (tpm2_is_active_pcr(&pcrs.selection[i])) + *active_pcr |= hash_mask; + } else { + printf("%s: unknown algorithm %x\n", __func__, + pcrs.selection[i].hash); + } + } + + *pcr_banks = pcrs.count; + + return 0; +} + u32 tpm2_dam_reset(struct udevice *dev, const char *pw, const ssize_t pw_sz) { u8 command_v2[COMMAND_BUFFER_SIZE] = { |