--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (c) 2013 The Chromium OS Authors.
+ * Coypright (c) 2013 Guntermann & Drunck GmbH
+ */
+
+#ifndef __TPM_API_H
+#define __TPM_API_H
+
+#include <tpm-common.h>
+#include <tpm-v1.h>
+#include <tpm-v2.h>
+
+/**
+ * Issue a TPM_Startup command.
+ *
+ * @param dev TPM device
+ * @param mode TPM startup mode
+ * @return return code of the operation
+ */
+u32 tpm_startup(struct udevice *dev, enum tpm_startup_type mode);
+
+/**
+ * Issue a TPM_SelfTestFull command.
+ *
+ * @param dev TPM device
+ * @return return code of the operation
+ */
+u32 tpm_self_test_full(struct udevice *dev);
+
+/**
+ * Issue a TPM_ContinueSelfTest command.
+ *
+ * @param dev TPM device
+ * @return return code of the operation
+ */
+u32 tpm_continue_self_test(struct udevice *dev);
+
+/**
+ * Issue a TPM_NV_DefineSpace command. The implementation is limited
+ * to specify TPM_NV_ATTRIBUTES and size of the area. The area index
+ * could be one of the special value listed in enum tpm_nv_index.
+ *
+ * @param dev TPM device
+ * @param index index of the area
+ * @param perm TPM_NV_ATTRIBUTES of the area
+ * @param size size of the area
+ * @return return code of the operation
+ */
+u32 tpm_nv_define_space(struct udevice *dev, u32 index, u32 perm, u32 size);
+
+/**
+ * Issue a TPM_NV_ReadValue command. This implementation is limited
+ * to read the area from offset 0. The area index could be one of
+ * the special value listed in enum tpm_nv_index.
+ *
+ * @param dev TPM device
+ * @param index index of the area
+ * @param data output buffer of the area contents
+ * @param count size of output buffer
+ * @return return code of the operation
+ */
+u32 tpm_nv_read_value(struct udevice *dev, u32 index, void *data, u32 count);
+
+/**
+ * Issue a TPM_NV_WriteValue command. This implementation is limited
+ * to write the area from offset 0. The area index could be one of
+ * the special value listed in enum tpm_nv_index.
+ *
+ * @param dev TPM device
+ * @param index index of the area
+ * @param data input buffer to be wrote to the area
+ * @param length length of data bytes of input buffer
+ * @return return code of the operation
+ */
+u32 tpm_nv_write_value(struct udevice *dev, u32 index, const void *data,
+ u32 length);
+
+/**
+ * Issue a TPM_Extend command.
+ *
+ * @param dev TPM device
+ * @param index index of the PCR
+ * @param in_digest 160-bit value representing the event to be
+ * recorded
+ * @param out_digest 160-bit PCR value after execution of the
+ * command
+ * @return return code of the operation
+ */
+u32 tpm_pcr_extend(struct udevice *dev, u32 index, const void *in_digest,
+ void *out_digest);
+
+/**
+ * Issue a TPM_PCRRead command.
+ *
+ * @param dev TPM device
+ * @param index index of the PCR
+ * @param data output buffer for contents of the named PCR
+ * @param count size of output buffer
+ * @return return code of the operation
+ */
+u32 tpm_pcr_read(struct udevice *dev, u32 index, void *data, size_t count);
+
+/**
+ * Issue a TSC_PhysicalPresence command. TPM physical presence flag
+ * is bit-wise OR'ed of flags listed in enum tpm_physical_presence.
+ *
+ * @param dev TPM device
+ * @param presence TPM physical presence flag
+ * @return return code of the operation
+ */
+u32 tpm_tsc_physical_presence(struct udevice *dev, u16 presence);
+
+/**
+ * Issue a TPM_ReadPubek command.
+ *
+ * @param dev TPM device
+ * @param data output buffer for the public endorsement key
+ * @param count size of output buffer
+ * @return return code of the operation
+ */
+u32 tpm_read_pubek(struct udevice *dev, void *data, size_t count);
+
+/**
+ * Issue a TPM_ForceClear command.
+ *
+ * @param dev TPM device
+ * @return return code of the operation
+ */
+u32 tpm_force_clear(struct udevice *dev);
+
+/**
+ * Issue a TPM_PhysicalEnable command.
+ *
+ * @param dev TPM device
+ * @return return code of the operation
+ */
+u32 tpm_physical_enable(struct udevice *dev);
+
+/**
+ * Issue a TPM_PhysicalDisable command.
+ *
+ * @param dev TPM device
+ * @return return code of the operation
+ */
+u32 tpm_physical_disable(struct udevice *dev);
+
+/**
+ * Issue a TPM_PhysicalSetDeactivated command.
+ *
+ * @param dev TPM device
+ * @param state boolean state of the deactivated flag
+ * @return return code of the operation
+ */
+u32 tpm_physical_set_deactivated(struct udevice *dev, u8 state);
+
+/**
+ * Issue a TPM_GetCapability command. This implementation is limited
+ * to query sub_cap index that is 4-byte wide.
+ *
+ * @param dev TPM device
+ * @param cap_area partition of capabilities
+ * @param sub_cap further definition of capability, which is
+ * limited to be 4-byte wide
+ * @param cap output buffer for capability information
+ * @param count size of output buffer
+ * @return return code of the operation
+ */
+u32 tpm_get_capability(struct udevice *dev, u32 cap_area, u32 sub_cap,
+ void *cap, size_t count);
+
+/**
+ * Issue a TPM_FlushSpecific command for a AUTH resource.
+ *
+ * @param dev TPM device
+ * @param auth_handle handle of the auth session
+ * @return return code of the operation
+ */
+u32 tpm_terminate_auth_session(struct udevice *dev, u32 auth_handle);
+
+/**
+ * Issue a TPM_OIAP command to setup an object independent authorization
+ * session.
+ * Information about the session is stored internally.
+ * If there was already an OIAP session active it is terminated and a new
+ * session is set up.
+ *
+ * @param dev TPM device
+ * @param auth_handle pointer to the (new) auth handle or NULL.
+ * @return return code of the operation
+ */
+u32 tpm_oiap(struct udevice *dev, u32 *auth_handle);
+
+/**
+ * Ends an active OIAP session.
+ *
+ * @param dev TPM device
+ * @return return code of the operation
+ */
+u32 tpm_end_oiap(struct udevice *dev);
+
+/**
+ * Issue a TPM_LoadKey2 (Auth1) command using an OIAP session for authenticating
+ * the usage of the parent key.
+ *
+ * @param dev TPM device
+ * @param parent_handle handle of the parent key.
+ * @param key pointer to the key structure (TPM_KEY or TPM_KEY12).
+ * @param key_length size of the key structure
+ * @param parent_key_usage_auth usage auth for the parent key
+ * @param key_handle pointer to the key handle
+ * @return return code of the operation
+ */
+u32 tpm_load_key2_oiap(struct udevice *dev, u32 parent_handle, const void *key,
+ size_t key_length, const void *parent_key_usage_auth,
+ u32 *key_handle);
+
+/**
+ * Issue a TPM_GetPubKey (Auth1) command using an OIAP session for
+ * authenticating the usage of the key.
+ *
+ * @param dev TPM device
+ * @param key_handle handle of the key
+ * @param usage_auth usage auth for the key
+ * @param pubkey pointer to the pub key buffer; may be NULL if the pubkey
+ * should not be stored.
+ * @param pubkey_len pointer to the pub key buffer len. On entry: the size of
+ * the provided pubkey buffer. On successful exit: the size
+ * of the stored TPM_PUBKEY structure (iff pubkey != NULL).
+ * @return return code of the operation
+ */
+u32 tpm_get_pub_key_oiap(struct udevice *dev, u32 key_handle,
+ const void *usage_auth, void *pubkey,
+ size_t *pubkey_len);
+
+/**
+ * Get the TPM permissions
+ *
+ * @param dev TPM device
+ * @param perm Returns permissions value
+ * @return return code of the operation
+ */
+u32 tpm_get_permissions(struct udevice *dev, u32 index, u32 *perm);
+
+/**
+ * Flush a resource with a given handle and type from the TPM
+ *
+ * @param dev TPM device
+ * @param key_handle handle of the resource
+ * @param resource_type type of the resource
+ * @return return code of the operation
+ */
+u32 tpm_flush_specific(struct udevice *dev, u32 key_handle, u32 resource_type);
+
+#ifdef CONFIG_TPM_LOAD_KEY_BY_SHA1
+/**
+ * Search for a key by usage AuthData and the hash of the parent's pub key.
+ *
+ * @param dev TPM device
+ * @param auth Usage auth of the key to search for
+ * @param pubkey_digest SHA1 hash of the pub key structure of the key
+ * @param[out] handle The handle of the key (Non-null iff found)
+ * @return 0 if key was found in TPM; != 0 if not.
+ */
+u32 tpm_find_key_sha1(struct udevice *dev, const u8 auth[20],
+ const u8 pubkey_digest[20], u32 *handle);
+#endif /* CONFIG_TPM_LOAD_KEY_BY_SHA1 */
+
+/**
+ * Read random bytes from the TPM RNG. The implementation deals with the fact
+ * that the TPM may legally return fewer bytes than requested by retrying
+ * until @p count bytes have been received.
+ *
+ * @param dev TPM device
+ * @param data output buffer for the random bytes
+ * @param count size of output buffer
+ * @return return code of the operation
+ */
+u32 tpm_get_random(struct udevice *dev, void *data, u32 count);
+
+/**
+ * tpm_finalise_physical_presence() - Finalise physical presence
+ *
+ * @param dev TPM device
+ * @return return code of the operation (0 = success)
+ */
+u32 tpm_finalise_physical_presence(struct udevice *dev);
+
+/**
+ * tpm_nv_enable_locking() - lock the non-volatile space
+ *
+ * @param dev TPM device
+ * @return return code of the operation (0 = success)
+ */
+u32 tpm_nv_enable_locking(struct udevice *dev);
+
+/**
+ * tpm_set_global_lock() - set the global lock
+ *
+ * @param dev TPM device
+ * @return return code of the operation (0 = success)
+ */
+u32 tpm_set_global_lock(struct udevice *dev);
+
+/**
+ * tpm_write_lock() - lock the non-volatile space
+ *
+ * @param dev TPM device
+ * @param index Index of space to lock
+ * @return return code of the operation (0 = success)
+ */
+u32 tpm_write_lock(struct udevice *dev, u32 index);
+
+/**
+ * tpm_resume() - start up the TPM from resume (after suspend)
+ *
+ * @param dev TPM device
+ * @return return code of the operation (0 = success)
+ */
+u32 tpm_resume(struct udevice *dev);
+
+#endif /* __TPM_API_H */
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2019 Google LLC
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <log.h>
+#include <tpm_api.h>
+#include <tpm-v1.h>
+#include <tpm-v2.h>
+#include <tpm_api.h>
+
+static bool is_tpm1(struct udevice *dev)
+{
+ return IS_ENABLED(CONFIG_TPM_V1) && tpm_get_version(dev) == TPM_V1;
+}
+
+u32 tpm_startup(struct udevice *dev, enum tpm_startup_type mode)
+{
+ if (is_tpm1(dev))
+ return tpm1_startup(dev, mode);
+ else
+ return -ENOSYS;
+}
+
+u32 tpm_resume(struct udevice *dev)
+{
+ if (is_tpm1(dev))
+ return tpm1_startup(dev, TPM_ST_STATE);
+ else
+ return -ENOSYS;
+}
+
+u32 tpm_self_test_full(struct udevice *dev)
+{
+ if (is_tpm1(dev))
+ return tpm1_self_test_full(dev);
+ else
+ return -ENOSYS;
+}
+
+u32 tpm_continue_self_test(struct udevice *dev)
+{
+ if (is_tpm1(dev))
+ return tpm1_continue_self_test(dev);
+ else
+ return -ENOSYS;
+}
+
+u32 tpm_clear_and_reenable(struct udevice *dev)
+{
+ u32 ret;
+
+ log_info("TPM: Clear and re-enable\n");
+ ret = tpm_force_clear(dev);
+ if (ret != TPM_SUCCESS) {
+ log_err("Can't initiate a force clear\n");
+ return ret;
+ }
+
+ if (is_tpm1(dev)) {
+ ret = tpm1_physical_enable(dev);
+ if (ret != TPM_SUCCESS) {
+ log_err("TPM: Can't set enabled state\n");
+ return ret;
+ }
+
+ ret = tpm1_physical_set_deactivated(dev, 0);
+ if (ret != TPM_SUCCESS) {
+ log_err("TPM: Can't set deactivated state\n");
+ return ret;
+ }
+ } else {
+ return -ENOSYS;
+ }
+
+ return TPM_SUCCESS;
+}
+
+u32 tpm_nv_enable_locking(struct udevice *dev)
+{
+ if (is_tpm1(dev))
+ return tpm1_nv_define_space(dev, TPM_NV_INDEX_LOCK, 0, 0);
+ else
+ return -ENOSYS;
+}
+
+u32 tpm_nv_read_value(struct udevice *dev, u32 index, void *data, u32 count)
+{
+ if (is_tpm1(dev))
+ return tpm1_nv_read_value(dev, index, data, count);
+ else
+ return -ENOSYS;
+}
+
+u32 tpm_nv_write_value(struct udevice *dev, u32 index, const void *data,
+ u32 count)
+{
+ if (is_tpm1(dev))
+ return tpm1_nv_write_value(dev, index, data, count);
+ else
+ return -ENOSYS;
+}
+
+u32 tpm_set_global_lock(struct udevice *dev)
+{
+ return tpm_nv_write_value(dev, TPM_NV_INDEX_0, NULL, 0);
+}
+
+u32 tpm_write_lock(struct udevice *dev, u32 index)
+{
+ if (is_tpm1(dev))
+ return -ENOSYS;
+ else
+ return -ENOSYS;
+}
+
+u32 tpm_pcr_extend(struct udevice *dev, u32 index, const void *in_digest,
+ void *out_digest)
+{
+ if (is_tpm1(dev))
+ return tpm1_extend(dev, index, in_digest, out_digest);
+ else
+ return -ENOSYS;
+}
+
+u32 tpm_pcr_read(struct udevice *dev, u32 index, void *data, size_t count)
+{
+ if (is_tpm1(dev))
+ return tpm1_pcr_read(dev, index, data, count);
+ else
+ return -ENOSYS;
+}
+
+u32 tpm_tsc_physical_presence(struct udevice *dev, u16 presence)
+{
+ if (is_tpm1(dev))
+ return tpm1_tsc_physical_presence(dev, presence);
+ else
+ return -ENOSYS;
+}
+
+u32 tpm_finalise_physical_presence(struct udevice *dev)
+{
+ if (is_tpm1(dev))
+ return tpm1_finalise_physical_presence(dev);
+ else
+ return -ENOSYS;
+}
+
+u32 tpm_read_pubek(struct udevice *dev, void *data, size_t count)
+{
+ if (is_tpm1(dev))
+ return tpm1_read_pubek(dev, data, count);
+ else
+ return -ENOSYS; /* not implemented yet */
+}
+
+u32 tpm_force_clear(struct udevice *dev)
+{
+ if (is_tpm1(dev))
+ return tpm1_force_clear(dev);
+ else
+ return -ENOSYS;
+}
+
+u32 tpm_physical_enable(struct udevice *dev)
+{
+ if (is_tpm1(dev))
+ return tpm1_physical_enable(dev);
+ else
+ return -ENOSYS;
+}
+
+u32 tpm_physical_disable(struct udevice *dev)
+{
+ if (is_tpm1(dev))
+ return tpm1_physical_disable(dev);
+ else
+ return -ENOSYS;
+}
+
+u32 tpm_physical_set_deactivated(struct udevice *dev, u8 state)
+{
+ if (is_tpm1(dev))
+ return tpm1_physical_set_deactivated(dev, state);
+ else
+ return -ENOSYS;
+}
+
+u32 tpm_get_capability(struct udevice *dev, u32 cap_area, u32 sub_cap,
+ void *cap, size_t count)
+{
+ if (is_tpm1(dev))
+ return tpm1_get_capability(dev, cap_area, sub_cap, cap, count);
+ else
+ return -ENOSYS;
+}
+
+u32 tpm_get_permissions(struct udevice *dev, u32 index, u32 *perm)
+{
+ if (is_tpm1(dev))
+ return tpm1_get_permissions(dev, index, perm);
+ else
+ return -ENOSYS; /* not implemented yet */
+}
+
+u32 tpm_get_random(struct udevice *dev, void *data, u32 count)
+{
+ if (is_tpm1(dev))
+ return tpm1_get_random(dev, data, count);
+ else
+ return -ENOSYS; /* not implemented yet */
+}
projects / u-boot.git / commitdiff