From c5a42cf3340aa740132bcdb8e8cee22c23306ef5 Mon Sep 17 00:00:00 2001
From: Hernan Gatta <hegatta@linux.microsoft.com>
Date: Tue, 1 Feb 2022 05:02:54 -0800
Subject: [PATCH v6 09/20] tpm2: Add TPM Software Stack (TSS)

A Trusted Platform Module (TPM) Software Stack (TSS) provides logic to
compose, submit, and parse TPM commands and responses.

A limited number of TPM commands may be accessed via the EFI TCG2
protocol. This protocol exposes functionality that is primarily geared
toward TPM usage within the context of Secure Boot. For all other TPM
commands, however, such as sealing and unsealing, this protocol does not
provide any help, with the exception of passthrough command submission.

The SubmitCommand method allows a caller to send raw commands to the
system's TPM and to receive the corresponding response. These
command/response pairs are formatted using the TPM wire protocol. To
construct commands in this way, and to parse the TPM's response, it is
necessary to, first, possess knowledge of the various TPM structures, and,
second, of the TPM wire protocol itself.

As such, this patch includes a set of header files that define the
necessary TPM structures and TSS functions, implementations of various
TPM2_* functions (inventoried below), and logic to write and read command
and response buffers, respectively, using the TPM wire protocol.

Functions: TPM2_Create, TPM2_CreatePrimary, TPM2_EvictControl,
TPM2_FlushContext, TPM2_Load, TPM2_PCR_Read, TPM2_PolicyGetDigest,
TPM2_PolicyPCR, TPM2_ReadPublic, TPM2_StartAuthSession, TPM2_Unseal.

Signed-off-by: Hernan Gatta <hegatta@linux.microsoft.com>
Signed-off-by: Gary Lin <glin@suse.com>
---
 grub-core/tpm2/buffer.c                | 145 +++++
 grub-core/tpm2/mu.c                    | 807 +++++++++++++++++++++++++
 grub-core/tpm2/tcg2.c                  | 143 +++++
 grub-core/tpm2/tpm2.c                  | 761 +++++++++++++++++++++++
 include/grub/tpm2/buffer.h             |  65 ++
 include/grub/tpm2/internal/functions.h | 117 ++++
 include/grub/tpm2/internal/structs.h   | 675 +++++++++++++++++++++
 include/grub/tpm2/internal/types.h     | 370 ++++++++++++
 include/grub/tpm2/mu.h                 | 292 +++++++++
 include/grub/tpm2/tcg2.h               |  34 ++
 include/grub/tpm2/tpm2.h               |  34 ++
 11 files changed, 3443 insertions(+)
 create mode 100644 grub-core/tpm2/buffer.c
 create mode 100644 grub-core/tpm2/mu.c
 create mode 100644 grub-core/tpm2/tcg2.c
 create mode 100644 grub-core/tpm2/tpm2.c
 create mode 100644 include/grub/tpm2/buffer.h
 create mode 100644 include/grub/tpm2/internal/functions.h
 create mode 100644 include/grub/tpm2/internal/structs.h
 create mode 100644 include/grub/tpm2/internal/types.h
 create mode 100644 include/grub/tpm2/mu.h
 create mode 100644 include/grub/tpm2/tcg2.h
 create mode 100644 include/grub/tpm2/tpm2.h

diff --git a/grub-core/tpm2/buffer.c b/grub-core/tpm2/buffer.c
new file mode 100644
index 000000000..cb9f29497
--- /dev/null
+++ b/grub-core/tpm2/buffer.c
@@ -0,0 +1,145 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2022 Microsoft Corporation
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/misc.h>
+#include <grub/tpm2/buffer.h>
+
+void grub_tpm2_buffer_init (grub_tpm2_buffer_t buffer)
+{
+  grub_memset (buffer->data, 0xDD, sizeof (buffer->data));
+  buffer->size = 0;
+  buffer->offset = 0;
+  buffer->cap = sizeof (buffer->data);
+  buffer->error = 0;
+}
+
+void
+grub_tpm2_buffer_pack (grub_tpm2_buffer_t buffer, const void* data,
+		       grub_size_t size)
+{
+  grub_uint32_t r = buffer->cap - buffer->size;
+
+  if (buffer->error)
+    return;
+
+  if (size > r)
+    {
+      buffer->error = 1;
+      return;
+    }
+
+  grub_memcpy (&buffer->data[buffer->size], (void*) data, size);
+  buffer->size += size;
+}
+
+void
+grub_tpm2_buffer_pack_u8 (grub_tpm2_buffer_t buffer, grub_uint8_t value)
+{
+  grub_tpm2_buffer_pack (buffer, (const char*) &value, sizeof (value));
+}
+
+void
+grub_tpm2_buffer_pack_u16 (grub_tpm2_buffer_t buffer, grub_uint16_t value)
+{
+  grub_uint16_t tmp = grub_cpu_to_be16 (value);
+  grub_tpm2_buffer_pack (buffer, (const char*) &tmp, sizeof (tmp));
+}
+
+void
+grub_tpm2_buffer_pack_u32 (grub_tpm2_buffer_t buffer, grub_uint32_t value)
+{
+  grub_uint32_t tmp = grub_cpu_to_be32 (value);
+  grub_tpm2_buffer_pack (buffer, (const char*) &tmp, sizeof (tmp));
+}
+
+void
+grub_tpm2_buffer_unpack (grub_tpm2_buffer_t buffer, void* data,
+			 grub_size_t size)
+{
+  grub_uint32_t r = buffer->size - buffer->offset;
+
+  if (buffer->error)
+    return;
+
+  if (size > r)
+    {
+      buffer->error = 1;
+      return;
+    }
+
+  grub_memcpy (data, &buffer->data[buffer->offset], size);
+  buffer->offset += size;
+}
+
+void
+grub_tpm2_buffer_unpack_u8 (grub_tpm2_buffer_t buffer, grub_uint8_t* value)
+{
+  grub_uint32_t r = buffer->size - buffer->offset;
+
+  if (buffer->error)
+    return;
+
+  if (sizeof (*value) > r)
+    {
+      buffer->error = 1;
+      return;
+    }
+
+  grub_memcpy (value, &buffer->data[buffer->offset], sizeof (*value));
+  buffer->offset += sizeof (*value);
+}
+
+void
+grub_tpm2_buffer_unpack_u16 (grub_tpm2_buffer_t buffer, grub_uint16_t* value)
+{
+  grub_uint16_t tmp;
+  grub_uint32_t r = buffer->size - buffer->offset;
+
+  if (buffer->error)
+    return;
+
+  if (sizeof (tmp) > r)
+    {
+      buffer->error = 1;
+      return;
+    }
+
+  grub_memcpy (&tmp, &buffer->data[buffer->offset], sizeof (tmp));
+  buffer->offset += sizeof (tmp);
+  *value = grub_be_to_cpu16 (tmp);
+}
+
+void
+grub_tpm2_buffer_unpack_u32 (grub_tpm2_buffer_t buffer, grub_uint32_t* value)
+{
+  grub_uint32_t tmp;
+  grub_uint32_t r = buffer->size - buffer->offset;
+
+  if (buffer->error)
+    return;
+
+  if (sizeof (tmp) > r)
+    {
+      buffer->error = 1;
+      return;
+    }
+
+  grub_memcpy (&tmp, &buffer->data[buffer->offset], sizeof (tmp));
+  buffer->offset += sizeof (tmp);
+  *value = grub_be_to_cpu32 (tmp);
+}
diff --git a/grub-core/tpm2/mu.c b/grub-core/tpm2/mu.c
new file mode 100644
index 000000000..1617f37cd
--- /dev/null
+++ b/grub-core/tpm2/mu.c
@@ -0,0 +1,807 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2022 Microsoft Corporation
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/misc.h>
+#include <grub/tpm2/mu.h>
+
+void
+grub_tpm2_mu_TPMS_AUTH_COMMAND_Marshal (grub_tpm2_buffer_t buffer,
+					const TPMS_AUTH_COMMAND* authCommand)
+{
+  grub_uint32_t start;
+  grub_uint32_t tmp;
+
+  grub_tpm2_buffer_pack_u32 (buffer, 0);
+  start = buffer->size;
+
+  grub_tpm2_buffer_pack_u32 (buffer, authCommand->sessionHandle);
+
+  grub_tpm2_buffer_pack_u16 (buffer, authCommand->nonce.size);
+  grub_tpm2_buffer_pack (buffer, authCommand->nonce.buffer,
+			 authCommand->nonce.size);
+
+  grub_tpm2_buffer_pack_u8 (buffer,
+			    *((const grub_uint8_t*) &authCommand->sessionAttributes));
+
+  grub_tpm2_buffer_pack_u16 (buffer, authCommand->hmac.size);
+  grub_tpm2_buffer_pack (buffer, authCommand->hmac.buffer,
+			 authCommand->hmac.size);
+
+  tmp = grub_cpu_to_be32 (buffer->size - start);
+  grub_memcpy (&buffer->data[start - sizeof (grub_uint32_t)], &tmp,
+	       sizeof (tmp));
+}
+
+void
+grub_tpm2_mu_TPM2B_Marshal (grub_tpm2_buffer_t buffer,
+			    const grub_uint16_t size,
+			    const grub_uint8_t* b)
+{
+  grub_tpm2_buffer_pack_u16 (buffer, size);
+
+  for (grub_uint16_t i = 0; i < size; i++)
+    grub_tpm2_buffer_pack_u8 (buffer, b[i]);
+}
+
+void
+grub_tpm2_mu_TPMU_SYM_KEY_BITS_Marshal (grub_tpm2_buffer_t buffer,
+					const TPMI_ALG_SYM_OBJECT algorithm,
+					const TPMU_SYM_KEY_BITS *p)
+{
+  switch (algorithm)
+    {
+    case TPM_ALG_AES:
+    case TPM_ALG_SM4:
+    case TPM_ALG_CAMELLIA:
+    case TPM_ALG_XOR:
+      grub_tpm2_buffer_pack_u16 (buffer, *((const grub_uint16_t*) p));
+      break;
+    case TPM_ALG_NULL:
+      break;
+    }
+}
+
+void
+grub_tpm2_mu_TPMU_SYM_MODE_Marshal (grub_tpm2_buffer_t buffer,
+				    const TPMI_ALG_SYM_OBJECT algorithm,
+				    const TPMU_SYM_MODE *p)
+{
+  switch (algorithm)
+    {
+    case TPM_ALG_AES:
+    case TPM_ALG_SM4:
+    case TPM_ALG_CAMELLIA:
+      grub_tpm2_buffer_pack_u16 (buffer, *((const grub_uint16_t*) p));
+      break;
+    case TPM_ALG_XOR:
+    case TPM_ALG_NULL:
+      break;
+    }
+}
+
+void
+grub_tpm2_mu_TPMT_SYM_DEF_Marshal (grub_tpm2_buffer_t buffer,
+				   const TPMT_SYM_DEF *p)
+{
+  grub_tpm2_buffer_pack_u16 (buffer, p->algorithm);
+  grub_tpm2_mu_TPMU_SYM_KEY_BITS_Marshal (buffer, p->algorithm, &p->keyBits);
+  grub_tpm2_mu_TPMU_SYM_MODE_Marshal (buffer, p->algorithm, &p->mode);
+}
+
+void
+grub_tpm2_mu_TPMS_PCR_SELECTION_Marshal (grub_tpm2_buffer_t buffer,
+					 const TPMS_PCR_SELECTION* pcrSelection)
+{
+  grub_tpm2_buffer_pack_u16 (buffer, pcrSelection->hash);
+  grub_tpm2_buffer_pack_u8 (buffer, pcrSelection->sizeOfSelect);
+
+  for (grub_uint32_t i = 0; i < pcrSelection->sizeOfSelect; i++)
+    grub_tpm2_buffer_pack_u8 (buffer, pcrSelection->pcrSelect[i]);
+}
+
+void
+grub_tpm2_mu_TPML_PCR_SELECTION_Marshal (grub_tpm2_buffer_t buffer,
+					 const TPML_PCR_SELECTION* pcrSelection)
+{
+  grub_tpm2_buffer_pack_u32 (buffer, pcrSelection->count);
+
+  for (grub_uint32_t i = 0; i < pcrSelection->count; i++)
+    grub_tpm2_mu_TPMS_PCR_SELECTION_Marshal (buffer,
+					     &pcrSelection->pcrSelections[i]);
+}
+
+void
+grub_tpm2_mu_TPMA_OBJECT_Marshal (grub_tpm2_buffer_t buffer,
+				  const TPMA_OBJECT *p)
+{
+  grub_tpm2_buffer_pack_u32 (buffer, *((const grub_uint32_t*) p));
+}
+
+void
+grub_tpm2_mu_TPMS_SCHEME_XOR_Marshal (grub_tpm2_buffer_t buffer,
+				      const TPMS_SCHEME_XOR *p)
+{
+  grub_tpm2_buffer_pack_u16 (buffer, p->hashAlg);
+  grub_tpm2_buffer_pack_u16 (buffer, p->kdf);
+}
+
+void
+grub_tpm2_mu_TPMS_SCHEME_HMAC_Marshal (grub_tpm2_buffer_t buffer,
+				       const TPMS_SCHEME_HMAC *p)
+{
+  grub_tpm2_buffer_pack_u16 (buffer, p->hashAlg);
+}
+
+void
+grub_tpm2_mu_TPMU_SCHEME_KEYEDHASH_Marshal (grub_tpm2_buffer_t buffer,
+					    const TPMI_ALG_KEYEDHASH_SCHEME scheme,
+					    const TPMU_SCHEME_KEYEDHASH *p)
+{
+  switch (scheme)
+    {
+    case TPM_ALG_HMAC:
+      grub_tpm2_mu_TPMS_SCHEME_HMAC_Marshal (buffer, &p->hmac);
+      break;
+    case TPM_ALG_XOR:
+      grub_tpm2_mu_TPMS_SCHEME_XOR_Marshal (buffer, &p->exclusiveOr);
+      break;
+    case TPM_ALG_NULL:
+      break;
+    default:
+      buffer->error = 1;
+      break;
+    }
+}
+
+void
+grub_tpm2_mu_TPMT_KEYEDHASH_SCHEME_Marshal (grub_tpm2_buffer_t buffer,
+					    const TPMT_KEYEDHASH_SCHEME *p)
+{
+  grub_tpm2_buffer_pack_u16 (buffer, p->scheme);
+  grub_tpm2_mu_TPMU_SCHEME_KEYEDHASH_Marshal (buffer, p->scheme, &p->details);
+}
+
+void
+grub_tpm2_mu_TPMS_KEYEDHASH_PARMS_Marshal (grub_tpm2_buffer_t buffer,
+					   const TPMS_KEYEDHASH_PARMS *p)
+{
+  grub_tpm2_mu_TPMT_KEYEDHASH_SCHEME_Marshal (buffer, &p->scheme);
+}
+
+void
+grub_tpm2_mu_TPMT_SYM_DEF_OBJECT_Marshal (grub_tpm2_buffer_t buffer,
+					  const TPMT_SYM_DEF_OBJECT *p)
+{
+  grub_tpm2_buffer_pack_u16 (buffer, p->algorithm);
+  grub_tpm2_mu_TPMU_SYM_KEY_BITS_Marshal (buffer, p->algorithm, &p->keyBits);
+  grub_tpm2_mu_TPMU_SYM_MODE_Marshal (buffer, p->algorithm, &p->mode);
+}
+
+void
+grub_tpm2_mu_TPMU_ASYM_SCHEME_Marshal (grub_tpm2_buffer_t buffer,
+				       const TPMI_ALG_RSA_DECRYPT scheme,
+				       const TPMU_ASYM_SCHEME *p __attribute__ ((unused)))
+{
+  switch (scheme)
+    {
+    case TPM_ALG_NULL:
+      break;
+    default:
+      /* Unsupported */
+      buffer->error = 1;
+      break;
+    }
+}
+
+void
+grub_tpm2_mu_TPMT_RSA_SCHEME_Marshal (grub_tpm2_buffer_t buffer,
+				      const TPMT_RSA_SCHEME *p)
+{
+  grub_tpm2_buffer_pack_u16 (buffer, p->scheme);
+  grub_tpm2_mu_TPMU_ASYM_SCHEME_Marshal (buffer, p->scheme, &p->details);
+}
+
+void
+grub_tpm2_mu_TPMS_RSA_PARMS_Marshal (grub_tpm2_buffer_t buffer,
+				     const TPMS_RSA_PARMS *p)
+{
+  grub_tpm2_mu_TPMT_SYM_DEF_OBJECT_Marshal (buffer, &p->symmetric);
+  grub_tpm2_mu_TPMT_RSA_SCHEME_Marshal (buffer, &p->scheme);
+  grub_tpm2_buffer_pack_u16 (buffer, p->keyBits);
+  grub_tpm2_buffer_pack_u32 (buffer, p->exponent);
+}
+
+void
+grub_tpm2_mu_TPMS_SYMCIPHER_PARMS_Marshal (grub_tpm2_buffer_t buffer,
+					   const TPMS_SYMCIPHER_PARMS *p)
+{
+  grub_tpm2_mu_TPMT_SYM_DEF_OBJECT_Marshal (buffer, &p->sym);
+}
+
+void
+grub_tpm2_mu_TPMT_ECC_SCHEME_Marshal (grub_tpm2_buffer_t buffer,
+				      const TPMT_ECC_SCHEME *p)
+{
+  grub_tpm2_buffer_pack_u16 (buffer, p->scheme);
+  grub_tpm2_mu_TPMU_ASYM_SCHEME_Marshal (buffer, p->scheme, &p->details);
+}
+
+void
+grub_tpm2_mu_TPMU_KDF_SCHEME_Marshal (grub_tpm2_buffer_t buffer,
+				      const TPMI_ALG_KDF scheme,
+				      const TPMU_KDF_SCHEME *p)
+{
+  switch (scheme)
+    {
+    case TPM_ALG_MGF1:
+      grub_tpm2_buffer_pack_u16 (buffer, p->mgf1.hashAlg);
+      break;
+    case TPM_ALG_KDF1_SP800_56A:
+      grub_tpm2_buffer_pack_u16 (buffer, p->kdf1_sp800_56a.hashAlg);
+      break;
+    case TPM_ALG_KDF2:
+      grub_tpm2_buffer_pack_u16 (buffer, p->kdf2.hashAlg);
+      break;
+    case TPM_ALG_KDF1_SP800_108:
+      grub_tpm2_buffer_pack_u16 (buffer, p->kdf1_sp800_108.hashAlg);
+      break;
+    case TPM_ALG_NULL:
+      break;
+    default:
+      buffer->error = 1;
+      break;
+    }
+}
+
+void
+grub_tpm2_mu_TPMT_KDF_SCHEME_Marshal (grub_tpm2_buffer_t buffer,
+				      const TPMT_KDF_SCHEME *p)
+{
+  grub_tpm2_buffer_pack_u16 (buffer, p->scheme);
+  grub_tpm2_mu_TPMU_KDF_SCHEME_Marshal (buffer, p->scheme, &p->details);
+}
+
+void
+grub_tpm2_mu_TPMS_ECC_PARMS_Marshal (grub_tpm2_buffer_t buffer,
+				     const TPMS_ECC_PARMS *p)
+{
+  grub_tpm2_mu_TPMT_SYM_DEF_OBJECT_Marshal (buffer, &p->symmetric);
+  grub_tpm2_mu_TPMT_ECC_SCHEME_Marshal (buffer, &p->scheme);
+  grub_tpm2_buffer_pack_u16 (buffer, p->curveID);
+  grub_tpm2_mu_TPMT_KDF_SCHEME_Marshal (buffer, &p->kdf);
+}
+
+void
+grub_tpm2_mu_TPMU_PUBLIC_PARMS_Marshal (grub_tpm2_buffer_t buffer,
+					const grub_uint32_t type,
+					const TPMU_PUBLIC_PARMS *p)
+{
+  switch (type)
+    {
+    case TPM_ALG_KEYEDHASH:
+      grub_tpm2_mu_TPMS_KEYEDHASH_PARMS_Marshal (buffer, &p->keyedHashDetail);
+      break;
+    case TPM_ALG_SYMCIPHER:
+      grub_tpm2_mu_TPMS_SYMCIPHER_PARMS_Marshal (buffer, &p->symDetail);
+      break;
+    case TPM_ALG_RSA:
+      grub_tpm2_mu_TPMS_RSA_PARMS_Marshal (buffer, &p->rsaDetail);
+      break;
+    case TPM_ALG_ECC:
+      grub_tpm2_mu_TPMS_ECC_PARMS_Marshal (buffer, &p->eccDetail);
+      break;
+    default:
+      buffer->error = 1;
+      break;
+    }
+}
+
+void
+grub_tpm2_mu_TPMS_ECC_POINT_Marshal (grub_tpm2_buffer_t buffer,
+				     const TPMS_ECC_POINT *p)
+{
+  grub_tpm2_mu_TPM2B_Marshal (buffer, p->x.size, p->x.buffer);
+  grub_tpm2_mu_TPM2B_Marshal (buffer, p->y.size, p->y.buffer);
+}
+
+void
+grub_tpm2_mu_TPMU_PUBLIC_ID_Marshal (grub_tpm2_buffer_t buffer,
+				     const TPMI_ALG_PUBLIC type,
+				     const TPMU_PUBLIC_ID *p)
+{
+  switch(type)
+    {
+    case TPM_ALG_KEYEDHASH:
+      grub_tpm2_mu_TPM2B_Marshal (buffer, p->keyedHash.size,
+				  p->keyedHash.buffer);
+      break;
+    case TPM_ALG_SYMCIPHER:
+      grub_tpm2_mu_TPM2B_Marshal (buffer, p->sym.size, p->sym.buffer);
+      break;
+    case TPM_ALG_RSA:
+      grub_tpm2_mu_TPM2B_Marshal (buffer, p->rsa.size, p->rsa.buffer);
+      break;
+    case TPM_ALG_ECC:
+      grub_tpm2_mu_TPMS_ECC_POINT_Marshal (buffer, &p->ecc);
+      break;
+    }
+}
+
+void
+grub_tpm2_mu_TPMT_PUBLIC_Marshal (grub_tpm2_buffer_t buffer,
+				  const TPMT_PUBLIC *p)
+{
+  grub_tpm2_buffer_pack_u16 (buffer, p->type);
+  grub_tpm2_buffer_pack_u16 (buffer, p->nameAlg);
+  grub_tpm2_mu_TPMA_OBJECT_Marshal (buffer, &p->objectAttributes);
+  grub_tpm2_mu_TPM2B_Marshal (buffer, p->authPolicy.size, p->authPolicy.buffer);
+  grub_tpm2_mu_TPMU_PUBLIC_PARMS_Marshal (buffer, p->type, &p->parameters);
+  grub_tpm2_mu_TPMU_PUBLIC_ID_Marshal (buffer, p->type, &p->unique);
+}
+
+void
+grub_tpm2_mu_TPM2B_PUBLIC_Marshal (grub_tpm2_buffer_t buffer,
+				   const TPM2B_PUBLIC *p)
+{
+  grub_uint32_t start;
+  grub_uint16_t size;
+
+  if (p)
+    {
+      grub_tpm2_buffer_pack_u16 (buffer, p->size);
+
+      start = buffer->size;
+      grub_tpm2_mu_TPMT_PUBLIC_Marshal (buffer, &p->publicArea);
+      size = grub_cpu_to_be16 (buffer->size - start);
+      grub_memcpy (&buffer->data[start - sizeof (grub_uint16_t)], &size,
+		   sizeof (size));
+    }
+  else
+    grub_tpm2_buffer_pack_u16 (buffer, 0);
+}
+
+void
+grub_tpm2_mu_TPMS_SENSITIVE_CREATE_Marshal (grub_tpm2_buffer_t buffer,
+					    const TPMS_SENSITIVE_CREATE *p)
+{
+  grub_tpm2_mu_TPM2B_Marshal (buffer, p->userAuth.size, p->userAuth.buffer);
+  grub_tpm2_mu_TPM2B_Marshal (buffer, p->data.size, p->data.buffer);
+}
+
+void
+grub_tpm2_mu_TPM2B_SENSITIVE_CREATE_Marshal (grub_tpm2_buffer_t buffer,
+					     const TPM2B_SENSITIVE_CREATE *sensitiveCreate)
+{
+  grub_uint32_t start;
+  grub_uint16_t size;
+
+  if (sensitiveCreate)
+    {
+      grub_tpm2_buffer_pack_u16 (buffer, sensitiveCreate->size);
+      start = buffer->size;
+      grub_tpm2_mu_TPMS_SENSITIVE_CREATE_Marshal (buffer,
+						  &sensitiveCreate->sensitive);
+      size = grub_cpu_to_be16 (buffer->size - start);
+
+      grub_memcpy (&buffer->data[start - sizeof (grub_uint16_t)], &size,
+		   sizeof (size));
+    }
+  else
+    grub_tpm2_buffer_pack_u16 (buffer, 0);
+}
+
+void
+grub_tpm2_mu_TPM2B_Unmarshal (grub_tpm2_buffer_t buffer,
+			      TPM2B* p)
+{
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->size);
+
+  for (grub_uint16_t i = 0; i < p->size; i++)
+    grub_tpm2_buffer_unpack_u8 (buffer, &p->buffer[i]);
+}
+
+void
+grub_tpm2_mu_TPMS_AUTH_RESPONSE_Unmarshal (grub_tpm2_buffer_t buffer,
+					   TPMS_AUTH_RESPONSE* p)
+{
+  grub_uint8_t tmp;
+  grub_uint32_t tmp32;
+
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->nonce.size);
+
+  if (p->nonce.size)
+    grub_tpm2_buffer_unpack (buffer, &p->nonce.buffer, p->nonce.size);
+
+  grub_tpm2_buffer_unpack_u8 (buffer, &tmp);
+  tmp32 = tmp;
+  grub_memcpy (&p->sessionAttributes, &tmp32, sizeof (grub_uint32_t));
+
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->hmac.size);
+
+  if (p->hmac.size)
+    grub_tpm2_buffer_unpack (buffer, &p->hmac.buffer, p->hmac.size);
+}
+
+void
+grub_tpm2_mu_TPM2B_DIGEST_Unmarshal (grub_tpm2_buffer_t buffer,
+				     TPM2B_DIGEST* digest)
+{
+  grub_tpm2_mu_TPM2B_Unmarshal (buffer, (TPM2B*)digest);
+}
+
+void
+grub_tpm2_mu_TPMA_OBJECT_Unmarshal (grub_tpm2_buffer_t buffer,
+				    TPMA_OBJECT *p)
+{
+  grub_tpm2_buffer_unpack_u32 (buffer, (grub_uint32_t*)p);
+}
+
+void
+grub_tpm2_mu_TPMS_SCHEME_HMAC_Unmarshal (grub_tpm2_buffer_t buffer,
+					 TPMS_SCHEME_HMAC *p)
+{
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->hashAlg);
+}
+
+void
+grub_tpm2_mu_TPMS_SCHEME_XOR_Unmarshal (grub_tpm2_buffer_t buffer,
+					TPMS_SCHEME_XOR *p)
+{
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->hashAlg);
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->kdf);
+}
+
+void
+grub_tpm2_mu_TPMU_SCHEME_KEYEDHASH_Unmarshal (grub_tpm2_buffer_t buffer,
+					      TPMI_ALG_KEYEDHASH_SCHEME scheme,
+					      TPMU_SCHEME_KEYEDHASH *p)
+{
+  switch (scheme)
+    {
+    case TPM_ALG_HMAC:
+      grub_tpm2_mu_TPMS_SCHEME_HMAC_Unmarshal (buffer, &p->hmac);
+      break;
+    case TPM_ALG_XOR:
+      grub_tpm2_mu_TPMS_SCHEME_XOR_Unmarshal (buffer, &p->exclusiveOr);
+      break;
+    case TPM_ALG_NULL:
+      break;
+    default:
+      buffer->error = 1;
+      break;
+    }
+}
+
+void
+grub_tpm2_mu_TPMT_KEYEDHASH_SCHEME_Unmarshal (grub_tpm2_buffer_t buffer,
+					      TPMT_KEYEDHASH_SCHEME *p)
+{
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->scheme);
+  grub_tpm2_mu_TPMU_SCHEME_KEYEDHASH_Unmarshal (buffer, p->scheme, &p->details);
+}
+
+void
+grub_tpm2_mu_TPMS_KEYEDHASH_PARMS_Unmarshal (grub_tpm2_buffer_t buffer,
+					     TPMS_KEYEDHASH_PARMS *p)
+{
+  grub_tpm2_mu_TPMT_KEYEDHASH_SCHEME_Unmarshal (buffer, &p->scheme);
+}
+
+void
+grub_tpm2_mu_TPMU_SYM_KEY_BITS_Unmarshal (grub_tpm2_buffer_t buffer,
+					  TPMI_ALG_SYM_OBJECT algorithm,
+					  TPMU_SYM_KEY_BITS *p)
+{
+  switch (algorithm)
+    {
+    case TPM_ALG_AES:
+    case TPM_ALG_SM4:
+    case TPM_ALG_CAMELLIA:
+    case TPM_ALG_XOR:
+      grub_tpm2_buffer_unpack_u16 (buffer, (grub_uint16_t*) p);
+      break;
+    case TPM_ALG_NULL:
+      break;
+    }
+}
+
+void
+grub_tpm2_mu_TPMU_SYM_MODE_Unmarshal (grub_tpm2_buffer_t buffer,
+				      TPMI_ALG_SYM_OBJECT algorithm,
+				      TPMU_SYM_MODE *p)
+{
+  switch (algorithm)
+    {
+    case TPM_ALG_AES:
+    case TPM_ALG_SM4:
+    case TPM_ALG_CAMELLIA:
+      grub_tpm2_buffer_unpack_u16 (buffer, (grub_uint16_t*) p);
+      break;
+    case TPM_ALG_XOR:
+    case TPM_ALG_NULL:
+      break;
+    }
+}
+
+void
+grub_tpm2_mu_TPMT_SYM_DEF_OBJECT_Unmarshal (grub_tpm2_buffer_t buffer,
+					    TPMT_SYM_DEF_OBJECT *p)
+{
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->algorithm);
+  grub_tpm2_mu_TPMU_SYM_KEY_BITS_Unmarshal (buffer, p->algorithm, &p->keyBits);
+  grub_tpm2_mu_TPMU_SYM_MODE_Unmarshal (buffer, p->algorithm, &p->mode);
+}
+
+void
+grub_tpm2_mu_TPMS_SYMCIPHER_PARMS_Unmarshal (grub_tpm2_buffer_t buffer,
+					     TPMS_SYMCIPHER_PARMS *p)
+{
+  grub_tpm2_mu_TPMT_SYM_DEF_OBJECT_Unmarshal (buffer, &p->sym);
+}
+
+void
+grub_tpm2_mu_TPMU_ASYM_SCHEME_Unmarshal (grub_tpm2_buffer_t buffer,
+					 TPMI_ALG_RSA_DECRYPT scheme,
+					 TPMU_ASYM_SCHEME *p __attribute__((unused)))
+{
+  switch (scheme)
+    {
+    case TPM_ALG_NULL:
+      break;
+    default:
+      /* Unsupported */
+      buffer->error = 1;
+      break;
+    }
+}
+
+void
+grub_tpm2_mu_TPMT_RSA_SCHEME_Unmarshal (grub_tpm2_buffer_t buffer,
+					TPMT_RSA_SCHEME *p)
+{
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->scheme);
+  grub_tpm2_mu_TPMU_ASYM_SCHEME_Unmarshal (buffer, p->scheme, &p->details);
+}
+
+void
+grub_tpm2_mu_TPMS_RSA_PARMS_Unmarshal (grub_tpm2_buffer_t buffer,
+				       TPMS_RSA_PARMS *p)
+{
+  grub_tpm2_mu_TPMT_SYM_DEF_OBJECT_Unmarshal (buffer, &p->symmetric);
+  grub_tpm2_mu_TPMT_RSA_SCHEME_Unmarshal (buffer, &p->scheme);
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->keyBits);
+  grub_tpm2_buffer_unpack_u32 (buffer, &p->exponent);
+}
+
+void
+grub_tpm2_mu_TPMT_ECC_SCHEME_Unmarshal (grub_tpm2_buffer_t buffer,
+					TPMT_ECC_SCHEME *p)
+{
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->scheme);
+  grub_tpm2_mu_TPMU_ASYM_SCHEME_Unmarshal (buffer, p->scheme, &p->details);
+}
+
+void
+grub_tpm2_mu_TPMU_KDF_SCHEME_Unmarshal (grub_tpm2_buffer_t buffer,
+					TPMI_ALG_KDF scheme,
+					TPMU_KDF_SCHEME *p)
+{
+  switch (scheme)
+    {
+    case TPM_ALG_MGF1:
+      grub_tpm2_buffer_unpack_u16 (buffer, &p->mgf1.hashAlg);
+      break;
+    case TPM_ALG_KDF1_SP800_56A:
+      grub_tpm2_buffer_unpack_u16 (buffer, &p->kdf1_sp800_56a.hashAlg);
+      break;
+    case TPM_ALG_KDF2:
+      grub_tpm2_buffer_unpack_u16 (buffer, &p->kdf2.hashAlg);
+      break;
+    case TPM_ALG_KDF1_SP800_108:
+      grub_tpm2_buffer_unpack_u16 (buffer, &p->kdf1_sp800_108.hashAlg);
+      break;
+    case TPM_ALG_NULL:
+      break;
+    default:
+      buffer->error = 1;
+      break;
+    }
+}
+
+void
+grub_tpm2_mu_TPMT_KDF_SCHEME_Unmarshal (grub_tpm2_buffer_t buffer,
+					TPMT_KDF_SCHEME *p)
+{
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->scheme);
+  grub_tpm2_mu_TPMU_KDF_SCHEME_Unmarshal (buffer, p->scheme, &p->details);
+}
+
+void
+grub_tpm2_mu_TPMS_ECC_PARMS_Unmarshal (grub_tpm2_buffer_t buffer,
+				       TPMS_ECC_PARMS *p)
+{
+  grub_tpm2_mu_TPMT_SYM_DEF_OBJECT_Unmarshal (buffer, &p->symmetric);
+  grub_tpm2_mu_TPMT_ECC_SCHEME_Unmarshal (buffer, &p->scheme );
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->curveID);
+  grub_tpm2_mu_TPMT_KDF_SCHEME_Unmarshal (buffer, &p->kdf);
+}
+
+void
+grub_tpm2_mu_TPMU_PUBLIC_PARMS_Unmarshal (grub_tpm2_buffer_t buffer,
+					  grub_uint32_t type,
+					  TPMU_PUBLIC_PARMS *p)
+{
+  switch (type)
+    {
+    case TPM_ALG_KEYEDHASH:
+      grub_tpm2_mu_TPMS_KEYEDHASH_PARMS_Unmarshal (buffer, &p->keyedHashDetail);
+      break;
+    case TPM_ALG_SYMCIPHER:
+      grub_tpm2_mu_TPMS_SYMCIPHER_PARMS_Unmarshal (buffer, &p->symDetail);
+      break;
+    case TPM_ALG_RSA:
+      grub_tpm2_mu_TPMS_RSA_PARMS_Unmarshal (buffer, &p->rsaDetail);
+      break;
+    case TPM_ALG_ECC:
+      grub_tpm2_mu_TPMS_ECC_PARMS_Unmarshal (buffer, &p->eccDetail);
+      break;
+    default:
+      buffer->error = 1;
+      break;
+    }
+}
+
+void
+grub_tpm2_mu_TPMS_ECC_POINT_Unmarshal (grub_tpm2_buffer_t buffer,
+				       TPMS_ECC_POINT *p)
+{
+  grub_tpm2_mu_TPM2B_Unmarshal (buffer, (TPM2B*) &p->x);
+  grub_tpm2_mu_TPM2B_Unmarshal (buffer, (TPM2B*) &p->y);
+}
+
+void
+grub_tpm2_mu_TPMU_PUBLIC_ID_Unmarshal (grub_tpm2_buffer_t buffer,
+				       TPMI_ALG_PUBLIC type,
+				       TPMU_PUBLIC_ID *p)
+{
+  switch(type)
+    {
+    case TPM_ALG_KEYEDHASH:
+      grub_tpm2_mu_TPM2B_Unmarshal (buffer, (TPM2B*) &p->keyedHash);
+      break;
+    case TPM_ALG_SYMCIPHER:
+      grub_tpm2_mu_TPM2B_Unmarshal (buffer, (TPM2B*) &p->sym);
+      break;
+    case TPM_ALG_RSA:
+      grub_tpm2_mu_TPM2B_Unmarshal (buffer, (TPM2B*) &p->rsa);
+      break;
+    case TPM_ALG_ECC:
+      grub_tpm2_mu_TPMS_ECC_POINT_Unmarshal (buffer, &p->ecc);
+      break;
+    }
+}
+
+void
+grub_tpm2_mu_TPMT_PUBLIC_Unmarshal (grub_tpm2_buffer_t buffer,
+				    TPMT_PUBLIC *p)
+{
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->type);
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->nameAlg);
+  grub_tpm2_mu_TPMA_OBJECT_Unmarshal (buffer, &p->objectAttributes);
+  grub_tpm2_mu_TPM2B_Unmarshal (buffer, (TPM2B*) &p->authPolicy);
+  grub_tpm2_mu_TPMU_PUBLIC_PARMS_Unmarshal (buffer, p->type, &p->parameters);
+  grub_tpm2_mu_TPMU_PUBLIC_ID_Unmarshal (buffer, p->type, &p->unique);
+}
+
+void
+grub_tpm2_mu_TPM2B_PUBLIC_Unmarshal (grub_tpm2_buffer_t buffer,
+				     TPM2B_PUBLIC *p)
+{
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->size);
+  grub_tpm2_mu_TPMT_PUBLIC_Unmarshal (buffer, &p->publicArea);
+}
+
+void
+grub_tpm2_mu_TPMS_NV_PUBLIC_Unmarshal (grub_tpm2_buffer_t buffer,
+				       TPMS_NV_PUBLIC *p)
+{
+  grub_tpm2_buffer_unpack_u32 (buffer, &p->nvIndex);
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->nameAlg);
+  grub_tpm2_buffer_unpack_u32 (buffer, &p->attributes);
+  grub_tpm2_mu_TPM2B_DIGEST_Unmarshal (buffer, &p->authPolicy);
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->dataSize);
+}
+
+void
+grub_tpm2_mu_TPM2B_NV_PUBLIC_Unmarshal (grub_tpm2_buffer_t buffer,
+					TPM2B_NV_PUBLIC *p)
+{
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->size);
+  grub_tpm2_mu_TPMS_NV_PUBLIC_Unmarshal (buffer, &p->nvPublic);
+}
+
+void
+grub_tpm2_mu_TPM2B_NAME_Unmarshal (grub_tpm2_buffer_t buffer,
+				   TPM2B_NAME *n)
+{
+  grub_tpm2_buffer_unpack_u16 (buffer, &n->size);
+  grub_tpm2_buffer_unpack (buffer, n->name, n->size);
+}
+
+void
+grub_tpm2_mu_TPMS_TAGGED_PROPERTY_Unmarshal (grub_tpm2_buffer_t buffer,
+					     TPMS_TAGGED_PROPERTY* property)
+{
+  grub_tpm2_buffer_unpack_u32 (buffer, &property->property);
+  grub_tpm2_buffer_unpack_u32 (buffer, &property->value);
+}
+
+void
+grub_tpm2_mu_TPMS_CAPABILITY_DATA_tpmProperties_Unmarshal (grub_tpm2_buffer_t buffer,
+							   TPMS_CAPABILITY_DATA* capabilityData)
+{
+  grub_tpm2_buffer_unpack_u32 (buffer,
+			       &capabilityData->data.tpmProperties.count);
+
+  if (buffer->error)
+    return;
+
+  for (grub_uint32_t i = 0; i < capabilityData->data.tpmProperties.count; i++)
+    grub_tpm2_mu_TPMS_TAGGED_PROPERTY_Unmarshal (buffer,
+						 &capabilityData->data.tpmProperties.tpmProperty[i]);
+}
+
+void
+grub_tpm2_mu_TPMT_TK_CREATION_Unmarshal (grub_tpm2_buffer_t buffer,
+					 TPMT_TK_CREATION *p)
+{
+  grub_tpm2_buffer_unpack_u16 (buffer, &p->tag);
+  grub_tpm2_buffer_unpack_u32 (buffer, &p->hierarchy);
+  grub_tpm2_mu_TPM2B_Unmarshal (buffer, (TPM2B*) &p->digest);
+}
+
+void
+grub_tpm2_mu_TPMS_PCR_SELECTION_Unmarshal (grub_tpm2_buffer_t buf,
+					   TPMS_PCR_SELECTION* pcrSelection)
+{
+  grub_tpm2_buffer_unpack_u16 (buf, &pcrSelection->hash);
+  grub_tpm2_buffer_unpack_u8 (buf, &pcrSelection->sizeOfSelect);
+
+  for (grub_uint32_t i = 0; i < pcrSelection->sizeOfSelect; i++)
+    grub_tpm2_buffer_unpack_u8 (buf, &pcrSelection->pcrSelect[i]);
+}
+
+void
+grub_tpm2_mu_TPML_PCR_SELECTION_Unmarshal (grub_tpm2_buffer_t buf,
+					   TPML_PCR_SELECTION* pcrSelection)
+{
+  grub_tpm2_buffer_unpack_u32 (buf, &pcrSelection->count);
+
+  for (grub_uint32_t i = 0; i < pcrSelection->count; i++)
+    grub_tpm2_mu_TPMS_PCR_SELECTION_Unmarshal (buf, &pcrSelection->pcrSelections[i]);
+}
+
+void
+grub_tpm2_mu_TPML_DIGEST_Unmarshal (grub_tpm2_buffer_t buf,
+				    TPML_DIGEST* digest)
+{
+  grub_tpm2_buffer_unpack_u32 (buf, &digest->count);
+
+  for (grub_uint32_t i = 0; i < digest->count; i++)
+    grub_tpm2_mu_TPM2B_DIGEST_Unmarshal (buf, &digest->digests[i]);
+}
diff --git a/grub-core/tpm2/tcg2.c b/grub-core/tpm2/tcg2.c
new file mode 100644
index 000000000..9e4b7f565
--- /dev/null
+++ b/grub-core/tpm2/tcg2.c
@@ -0,0 +1,143 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2022 Microsoft Corporation
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/efi/api.h>
+#include <grub/efi/efi.h>
+#include <grub/efi/tpm.h>
+#include <grub/mm.h>
+#include <grub/tpm2/tcg2.h>
+
+static grub_err_t
+grub_tcg2_get_caps (grub_efi_tpm2_protocol_t *protocol, int *tpm2,
+		    grub_size_t *max_output_size)
+{
+  grub_efi_status_t status;
+
+  static int has_caps = 0;
+  static EFI_TCG2_BOOT_SERVICE_CAPABILITY caps =
+  {
+    .Size = (grub_uint8_t) sizeof (caps)
+  };
+
+  if (has_caps)
+    goto exit;
+
+  status = protocol->get_capability (protocol, &caps);
+  if (status != GRUB_EFI_SUCCESS || !caps.TPMPresentFlag)
+    return GRUB_ERR_FILE_NOT_FOUND;
+
+  has_caps = 1;
+
+exit:
+  if (tpm2)
+    *tpm2 = caps.TPMPresentFlag;
+  if (max_output_size)
+    *max_output_size = caps.MaxResponseSize;
+
+  return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_tcg2_get_protocol (grub_efi_tpm2_protocol_t **protocol)
+{
+  static grub_guid_t tpm2_guid = EFI_TPM2_GUID;
+  static grub_efi_tpm2_protocol_t *tpm2_protocol = NULL;
+
+  int tpm2;
+  grub_efi_handle_t *handles;
+  grub_efi_uintn_t num_handles;
+  grub_efi_handle_t tpm2_handle;
+  grub_err_t err = GRUB_ERR_FILE_NOT_FOUND;
+
+  if (tpm2_protocol)
+    {
+      *protocol = tpm2_protocol;
+      return GRUB_ERR_NONE;
+    }
+
+  handles = grub_efi_locate_handle (GRUB_EFI_BY_PROTOCOL, &tpm2_guid, NULL,
+				    &num_handles);
+  if (!handles || !num_handles)
+    return err;
+
+  tpm2_handle = handles[0];
+
+  tpm2_protocol = grub_efi_open_protocol (tpm2_handle, &tpm2_guid,
+					  GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);
+  if (!tpm2_protocol)
+    goto exit;
+
+  err = grub_tcg2_get_caps (tpm2_protocol, &tpm2, NULL);
+  if (err || !tpm2)
+    goto exit;
+
+  *protocol = tpm2_protocol;
+  err = GRUB_ERR_NONE;
+
+exit:
+  grub_free (handles);
+  return err;
+}
+
+grub_err_t
+grub_tcg2_get_max_output_size (grub_size_t *size)
+{
+  grub_err_t err;
+  grub_size_t max;
+  grub_efi_tpm2_protocol_t *protocol;
+
+  if (!size)
+    return GRUB_ERR_BAD_ARGUMENT;
+
+  err = grub_tcg2_get_protocol (&protocol);
+  if (err)
+    return err;
+
+  err = grub_tcg2_get_caps (protocol, NULL, &max);
+  if (err)
+    return err;
+
+  *size = max;
+
+  return GRUB_ERR_NONE;
+}
+
+grub_err_t
+grub_tcg2_submit_command (grub_size_t input_size,
+			  grub_uint8_t *input,
+			  grub_size_t output_size,
+			  grub_uint8_t *output)
+{
+  grub_err_t err;
+  grub_efi_status_t status;
+  grub_efi_tpm2_protocol_t *protocol;
+
+  if (!input_size || !input || !output_size || !output)
+    return GRUB_ERR_BAD_ARGUMENT;
+
+  err = grub_tcg2_get_protocol (&protocol);
+  if (err)
+    return err;
+
+  status = protocol->submit_command (protocol, input_size, input,
+				     output_size, output);
+  if (status != GRUB_EFI_SUCCESS)
+    return GRUB_ERR_INVALID_COMMAND;
+
+  return GRUB_ERR_NONE;
+}
diff --git a/grub-core/tpm2/tpm2.c b/grub-core/tpm2/tpm2.c
new file mode 100644
index 000000000..d67699a24
--- /dev/null
+++ b/grub-core/tpm2/tpm2.c
@@ -0,0 +1,761 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2022 Microsoft Corporation
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/err.h>
+#include <grub/misc.h>
+#include <grub/tpm2/buffer.h>
+#include <grub/tpm2/mu.h>
+#include <grub/tpm2/tcg2.h>
+#include <grub/tpm2/tpm2.h>
+#include <grub/types.h>
+
+static TPM_RC
+grub_tpm2_submit_command_real (const TPMI_ST_COMMAND_TAG tag,
+			       const TPM_CC commandCode,
+			       TPM_RC *responseCode,
+			       const struct grub_tpm2_buffer *in,
+			       struct grub_tpm2_buffer *out)
+{
+  grub_err_t err;
+  struct grub_tpm2_buffer buf;
+  TPMI_ST_COMMAND_TAG tag_out;
+  grub_uint32_t command_size;
+  grub_size_t max_output_size;
+
+  /* Marshal */
+  grub_tpm2_buffer_init (&buf);
+  grub_tpm2_buffer_pack_u16 (&buf, tag);
+  grub_tpm2_buffer_pack_u32 (&buf, 0);
+  grub_tpm2_buffer_pack_u32 (&buf, commandCode);
+  grub_tpm2_buffer_pack (&buf, in->data, in->size);
+
+  if (buf.error)
+    return TPM_RC_FAILURE;
+
+  command_size = grub_swap_bytes32 (buf.size);
+  grub_memcpy (&buf.data[sizeof (grub_uint16_t)], &command_size,
+	       sizeof (command_size));
+
+  /* Stay within output block limits */
+  err = grub_tcg2_get_max_output_size (&max_output_size);
+  if (err || max_output_size > out->cap)
+    max_output_size = out->cap - 1;
+
+  /* Submit */
+  err = grub_tcg2_submit_command (buf.size, buf.data, max_output_size,
+				  out->data);
+  if (err)
+    return TPM_RC_FAILURE;
+
+  /* Unmarshal*/
+  out->size = sizeof (grub_uint16_t) + sizeof (grub_uint32_t) +
+	      sizeof (grub_uint32_t);
+  grub_tpm2_buffer_unpack_u16 (out, &tag_out);
+  grub_tpm2_buffer_unpack_u32 (out, &command_size);
+  grub_tpm2_buffer_unpack_u32 (out, responseCode);
+  out->size = command_size;
+  if (out->error)
+    return TPM_RC_FAILURE;
+
+  return TPM_RC_SUCCESS;
+}
+
+static TPM_RC
+grub_tpm2_submit_command (const TPMI_ST_COMMAND_TAG tag,
+			  const TPM_CC commandCode,
+			  TPM_RC *responseCode,
+			  const struct grub_tpm2_buffer *in,
+			  struct grub_tpm2_buffer *out)
+{
+  TPM_RC err;
+  int retry_cnt = 0;
+
+  /* Catch TPM_RC_RETRY and send the command again */
+  do {
+    err = grub_tpm2_submit_command_real (tag, commandCode, responseCode,
+					 in, out);
+    if (*responseCode != TPM_RC_RETRY)
+      break;
+
+    retry_cnt++;
+  } while (retry_cnt < 3);
+
+  return err;
+}
+
+TPM_RC
+TPM2_CreatePrimary (const TPMI_RH_HIERARCHY primaryHandle,
+		    const TPMS_AUTH_COMMAND *authCommand,
+		    const TPM2B_SENSITIVE_CREATE *inSensitive,
+		    const TPM2B_PUBLIC *inPublic,
+		    const TPM2B_DATA *outsideInfo,
+		    const TPML_PCR_SELECTION *creationPCR,
+		    TPM_HANDLE *objectHandle,
+		    TPM2B_PUBLIC *outPublic,
+		    TPM2B_CREATION_DATA *creationData,
+		    TPM2B_DIGEST *creationHash,
+		    TPMT_TK_CREATION *creationTicket,
+		    TPM2B_NAME *name,
+		    TPMS_AUTH_RESPONSE *authResponse)
+{
+  TPM_RC rc;
+  struct grub_tpm2_buffer in;
+  struct grub_tpm2_buffer out;
+  TPM_HANDLE objectHandleTmp;
+  TPM2B_PUBLIC outPublicTmp;
+  TPM2B_CREATION_DATA creationDataTmp;
+  TPM2B_DIGEST creationHashTmp;
+  TPMT_TK_CREATION creationTicketTmp;
+  TPM2B_NAME nameTmp;
+  TPMS_AUTH_RESPONSE authResponseTmp;
+  TPMI_ST_COMMAND_TAG tag = authCommand ? TPM_ST_SESSIONS : TPM_ST_NO_SESSIONS;
+  TPM_RC responseCode;
+  grub_uint32_t parameterSize;
+
+  if (!inSensitive || !inPublic || !outsideInfo || !creationPCR)
+    return TPM_RC_VALUE;
+
+  if (!objectHandle)
+    objectHandle = &objectHandleTmp;
+  if (!outPublic)
+    outPublic = &outPublicTmp;
+  if (!creationData)
+    creationData = &creationDataTmp;
+  if (!creationHash)
+    creationHash = &creationHashTmp;
+  if (!creationTicket)
+    creationTicket = &creationTicketTmp;
+  if (!name)
+    name = &nameTmp;
+  if (!authResponse)
+    authResponse = &authResponseTmp;
+
+  grub_memset (outPublic, 0, sizeof (*outPublic));
+  grub_memset (creationData, 0, sizeof (*creationData));
+  grub_memset (creationHash, 0, sizeof (*creationHash));
+  grub_memset (creationTicket, 0, sizeof (*creationTicket));
+  grub_memset (name, 0, sizeof (*name));
+  grub_memset (authResponse, 0, sizeof (*authResponse));
+
+  /* Marshal */
+  grub_tpm2_buffer_init (&in);
+  grub_tpm2_buffer_pack_u32 (&in, primaryHandle);
+  if (authCommand)
+    grub_tpm2_mu_TPMS_AUTH_COMMAND_Marshal (&in, authCommand);
+  grub_tpm2_mu_TPM2B_SENSITIVE_CREATE_Marshal (&in, inSensitive);
+  grub_tpm2_mu_TPM2B_PUBLIC_Marshal (&in, inPublic);
+  grub_tpm2_mu_TPM2B_Marshal (&in, outsideInfo->size, outsideInfo->buffer);
+  grub_tpm2_mu_TPML_PCR_SELECTION_Marshal (&in, creationPCR);
+  if (in.error)
+    return TPM_RC_FAILURE;
+
+  /* Submit */
+  grub_tpm2_buffer_init (&out);
+  rc = grub_tpm2_submit_command (tag, TPM_CC_CreatePrimary, &responseCode, &in,
+				 &out);
+  if (rc != TPM_RC_SUCCESS)
+    return rc;
+  if (responseCode != TPM_RC_SUCCESS)
+    return responseCode;
+
+  /* Unmarshal*/
+  grub_tpm2_buffer_unpack_u32 (&out, objectHandle);
+  if (tag == TPM_ST_SESSIONS)
+    grub_tpm2_buffer_unpack_u32 (&out, &parameterSize);
+  grub_tpm2_mu_TPM2B_PUBLIC_Unmarshal (&out, outPublic);
+  grub_tpm2_mu_TPM2B_Unmarshal (&out, (TPM2B*)creationData);
+  grub_tpm2_mu_TPM2B_Unmarshal (&out, (TPM2B*)creationHash);
+  grub_tpm2_mu_TPMT_TK_CREATION_Unmarshal (&out, creationTicket);
+  grub_tpm2_mu_TPM2B_Unmarshal (&out, (TPM2B*)name);
+  if (tag == TPM_ST_SESSIONS)
+    grub_tpm2_mu_TPMS_AUTH_RESPONSE_Unmarshal (&out, authResponse);
+  if (out.error)
+    return TPM_RC_FAILURE;
+
+  return TPM_RC_SUCCESS;
+}
+
+TPM_RC
+TPM2_StartAuthSession (const TPMI_DH_OBJECT tpmKey,
+		       const TPMI_DH_ENTITY bind,
+		       const TPMS_AUTH_COMMAND *authCommand,
+		       const TPM2B_NONCE *nonceCaller,
+		       const TPM2B_ENCRYPTED_SECRET *encryptedSalt,
+		       const TPM_SE sessionType,
+		       const TPMT_SYM_DEF *symmetric,
+		       const TPMI_ALG_HASH authHash,
+		       TPMI_SH_AUTH_SESSION *sessionHandle,
+		       TPM2B_NONCE *nonceTpm,
+		       TPMS_AUTH_RESPONSE *authResponse)
+{
+  TPM_RC rc;
+  struct grub_tpm2_buffer in;
+  struct grub_tpm2_buffer out;
+  TPMI_SH_AUTH_SESSION sessionHandleTmp;
+  TPM2B_NONCE nonceTpmTmp;
+  TPMS_AUTH_RESPONSE authResponseTmp;
+  TPMI_ST_COMMAND_TAG tag = authCommand ? TPM_ST_SESSIONS : TPM_ST_NO_SESSIONS;
+  TPM_RC responseCode;
+  grub_uint32_t param_size;
+
+  if (!nonceCaller || !symmetric)
+    return TPM_RC_VALUE;
+
+  if (tpmKey == TPM_RH_NULL &&
+      (encryptedSalt && encryptedSalt->size != 0))
+    return TPM_RC_VALUE;
+
+  if (!sessionHandle)
+    sessionHandle = &sessionHandleTmp;
+  if (!nonceTpm)
+    nonceTpm = &nonceTpmTmp;
+  if (!authResponse)
+    authResponse = &authResponseTmp;
+
+  grub_memset (sessionHandle, 0, sizeof (*sessionHandle));
+  grub_memset (nonceTpm, 0, sizeof (*nonceTpm));
+  grub_memset (authResponse, 0, sizeof (*authResponse));
+
+  /* Marshal */
+  grub_tpm2_buffer_init (&in);
+  grub_tpm2_buffer_pack_u32 (&in, tpmKey);
+  grub_tpm2_buffer_pack_u32 (&in, bind);
+  if (tag == TPM_ST_SESSIONS)
+    grub_tpm2_mu_TPMS_AUTH_COMMAND_Marshal (&in, authCommand);
+  grub_tpm2_mu_TPM2B_Marshal (&in, nonceCaller->size, nonceCaller->buffer);
+  if (encryptedSalt)
+    grub_tpm2_mu_TPM2B_Marshal (&in, encryptedSalt->size, encryptedSalt->secret);
+  else
+    grub_tpm2_buffer_pack_u16 (&in, 0);
+  grub_tpm2_buffer_pack_u8 (&in, sessionType);
+  grub_tpm2_mu_TPMT_SYM_DEF_Marshal (&in, symmetric);
+  grub_tpm2_buffer_pack_u16 (&in, authHash);
+  if (in.error)
+    return TPM_RC_FAILURE;
+
+  /* Submit */
+  grub_tpm2_buffer_init (&out);
+  rc = grub_tpm2_submit_command (tag, TPM_CC_StartAuthSession, &responseCode,
+				 &in, &out);
+  if (rc != TPM_RC_SUCCESS)
+    return rc;
+  if (responseCode != TPM_RC_SUCCESS)
+    return responseCode;
+
+  /* Unmarshal*/
+  grub_tpm2_buffer_unpack_u32 (&out, sessionHandle);
+  if (tag == TPM_ST_SESSIONS)
+    grub_tpm2_buffer_unpack_u32 (&out, &param_size);
+  grub_tpm2_mu_TPM2B_Unmarshal (&out, (TPM2B*)nonceTpm);
+  if (tag == TPM_ST_SESSIONS)
+    grub_tpm2_mu_TPMS_AUTH_RESPONSE_Unmarshal (&out, authResponse);
+  if (out.error)
+    return TPM_RC_FAILURE;
+
+  return TPM_RC_SUCCESS;
+}
+
+TPM_RC
+TPM2_PolicyPCR (const TPMI_SH_POLICY policySessions,
+		const TPMS_AUTH_COMMAND *authCommand,
+		const TPM2B_DIGEST *pcrDigest,
+		const TPML_PCR_SELECTION *pcrs,
+		TPMS_AUTH_RESPONSE *authResponse)
+{
+  TPM_RC rc;
+  struct grub_tpm2_buffer in;
+  struct grub_tpm2_buffer out;
+  TPMS_AUTH_RESPONSE authResponseTmp;
+  TPMI_ST_COMMAND_TAG tag = authCommand ? TPM_ST_SESSIONS : TPM_ST_NO_SESSIONS;
+  TPM_RC responseCode;
+  grub_uint32_t param_size;
+
+  if (!pcrs)
+    return TPM_RC_VALUE;
+
+  if (!authResponse)
+    authResponse = &authResponseTmp;
+
+  grub_memset (authResponse, 0, sizeof (*authResponse));
+
+  /* Marshal */
+  grub_tpm2_buffer_init (&in);
+  grub_tpm2_buffer_pack_u32 (&in, policySessions);
+  if (tag == TPM_ST_SESSIONS)
+    grub_tpm2_mu_TPMS_AUTH_COMMAND_Marshal (&in, authCommand);
+  if (pcrDigest)
+    grub_tpm2_mu_TPM2B_Marshal (&in, pcrDigest->size, pcrDigest->buffer);
+  else
+    grub_tpm2_buffer_pack_u16 (&in, 0);
+  grub_tpm2_mu_TPML_PCR_SELECTION_Marshal (&in, pcrs);
+  if (in.error)
+    return TPM_RC_FAILURE;
+
+  /* Submit */
+  grub_tpm2_buffer_init (&out);
+  rc = grub_tpm2_submit_command (tag, TPM_CC_PolicyPCR, &responseCode, &in,
+				 &out);
+  if (rc != TPM_RC_SUCCESS)
+    return rc;
+  if (responseCode != TPM_RC_SUCCESS)
+    return responseCode;
+
+  /* Unmarshal*/
+  if (tag == TPM_ST_SESSIONS)
+    grub_tpm2_buffer_unpack_u32 (&out, &param_size);
+  if (tag == TPM_ST_SESSIONS)
+    grub_tpm2_mu_TPMS_AUTH_RESPONSE_Unmarshal (&out, authResponse);
+  if (out.error)
+    return TPM_RC_FAILURE;
+
+  return TPM_RC_SUCCESS;
+}
+
+TPM_RC
+TPM2_ReadPublic (const TPMI_DH_OBJECT objectHandle,
+		 const TPMS_AUTH_COMMAND* authCommand,
+		 TPM2B_PUBLIC *outPublic)
+{
+  TPM_RC rc;
+  struct grub_tpm2_buffer in;
+  struct grub_tpm2_buffer out;
+  TPMI_ST_COMMAND_TAG tag = authCommand ? TPM_ST_SESSIONS : TPM_ST_NO_SESSIONS;
+  TPM_RC responseCode;
+  grub_uint32_t parameterSize;
+
+  /* Marshal */
+  grub_tpm2_buffer_init (&in);
+  grub_tpm2_buffer_pack_u32 (&in, objectHandle);
+  if (in.error)
+    return TPM_RC_FAILURE;
+
+  /* Submit */
+  grub_tpm2_buffer_init (&out);
+  rc = grub_tpm2_submit_command (tag, TPM_CC_ReadPublic, &responseCode, &in,
+				 &out);
+  if (rc != TPM_RC_SUCCESS)
+    return rc;
+  if (responseCode != TPM_RC_SUCCESS)
+    return responseCode;
+
+  /* Unmarshal*/
+  if (tag == TPM_ST_SESSIONS)
+    grub_tpm2_buffer_unpack_u32 (&out, &parameterSize);
+  grub_tpm2_mu_TPM2B_PUBLIC_Unmarshal (&out, outPublic);
+  if (out.error)
+    return TPM_RC_FAILURE;
+
+  return TPM_RC_SUCCESS;
+}
+
+TPM_RC
+TPM2_Load (const TPMI_DH_OBJECT parent_handle,
+	   const TPMS_AUTH_COMMAND *authCommand,
+	   const TPM2B_PRIVATE *inPrivate,
+	   const TPM2B_PUBLIC *inPublic,
+	   TPM_HANDLE *objectHandle,
+	   TPM2B_NAME *name,
+	   TPMS_AUTH_RESPONSE *authResponse)
+{
+  TPM_RC rc;
+  struct grub_tpm2_buffer in;
+  struct grub_tpm2_buffer out;
+  TPM_HANDLE objectHandleTmp;
+  TPM2B_NAME nonceTmp;
+  TPMS_AUTH_RESPONSE authResponseTmp;
+  TPMI_ST_COMMAND_TAG tag = authCommand ? TPM_ST_SESSIONS : TPM_ST_NO_SESSIONS;
+  TPM_RC responseCode;
+  grub_uint32_t param_size;
+
+  if (!inPrivate || !inPublic)
+    return TPM_RC_VALUE;
+
+  if (!objectHandle)
+    objectHandle = &objectHandleTmp;
+  if (!name)
+    name = &nonceTmp;
+  if (!authResponse)
+    authResponse = &authResponseTmp;
+
+  grub_memset (objectHandle, 0, sizeof (*objectHandle));
+  grub_memset (name, 0, sizeof (*name));
+  grub_memset (authResponse, 0, sizeof (*authResponse));
+
+  /* Marshal */
+  grub_tpm2_buffer_init (&in);
+  grub_tpm2_buffer_pack_u32 (&in, parent_handle);
+  if (authCommand)
+    grub_tpm2_mu_TPMS_AUTH_COMMAND_Marshal (&in, authCommand);
+  grub_tpm2_mu_TPM2B_Marshal (&in, inPrivate->size, inPrivate->buffer);
+  grub_tpm2_mu_TPM2B_PUBLIC_Marshal (&in, inPublic);
+  if (in.error)
+    return TPM_RC_FAILURE;
+
+  /* Submit */
+  grub_tpm2_buffer_init (&out);
+  rc = grub_tpm2_submit_command (tag, TPM_CC_Load, &responseCode, &in, &out);
+  if (rc != TPM_RC_SUCCESS)
+    return rc;
+  if (responseCode != TPM_RC_SUCCESS)
+    return responseCode;
+
+  /* Unmarshal*/
+  grub_tpm2_buffer_unpack_u32 (&out, objectHandle);
+  if (tag == TPM_ST_SESSIONS)
+    grub_tpm2_buffer_unpack_u32 (&out, &param_size);
+  grub_tpm2_mu_TPM2B_Unmarshal (&out, (TPM2B*)name);
+  if (tag == TPM_ST_SESSIONS)
+    grub_tpm2_mu_TPMS_AUTH_RESPONSE_Unmarshal (&out, authResponse);
+  if (out.error)
+    return TPM_RC_FAILURE;
+
+  return TPM_RC_SUCCESS;
+}
+
+TPM_RC
+TPM2_Unseal (const TPMI_DH_OBJECT itemHandle,
+	     const TPMS_AUTH_COMMAND *authCommand,
+	     TPM2B_SENSITIVE_DATA *outData,
+	     TPMS_AUTH_RESPONSE *authResponse)
+{
+  TPM_RC rc;
+  struct grub_tpm2_buffer in;
+  struct grub_tpm2_buffer out;
+  TPM2B_SENSITIVE_DATA outDataTmp;
+  TPMS_AUTH_RESPONSE authResponseTmp;
+  TPMI_ST_COMMAND_TAG tag = authCommand ? TPM_ST_SESSIONS : TPM_ST_NO_SESSIONS;
+  TPM_RC responseCode;
+  grub_uint32_t param_size;
+
+  if (!outData)
+    outData = &outDataTmp;
+  if (!authResponse)
+    authResponse = &authResponseTmp;
+
+  grub_memset (outData, 0, sizeof (*outData));
+  grub_memset (authResponse, 0, sizeof (*authResponse));
+
+  /* Marshal */
+  grub_tpm2_buffer_init (&in);
+  grub_tpm2_buffer_pack_u32 (&in, itemHandle);
+  if (authCommand)
+    grub_tpm2_mu_TPMS_AUTH_COMMAND_Marshal (&in, authCommand);
+  if (in.error)
+    return TPM_RC_FAILURE;
+
+  /* Submit */
+  grub_tpm2_buffer_init (&out);
+  rc = grub_tpm2_submit_command (tag, TPM_CC_Unseal, &responseCode, &in, &out);
+  if (rc != TPM_RC_SUCCESS)
+    return rc;
+  if (responseCode != TPM_RC_SUCCESS)
+    return responseCode;
+
+  // Unmarhsal
+  if (tag == TPM_ST_SESSIONS)
+    grub_tpm2_buffer_unpack_u32 (&out, &param_size);
+  grub_tpm2_mu_TPM2B_Unmarshal (&out, (TPM2B*)outData);
+  if (tag == TPM_ST_SESSIONS)
+    grub_tpm2_mu_TPMS_AUTH_RESPONSE_Unmarshal (&out, authResponse);
+  if (out.error)
+    return TPM_RC_FAILURE;
+
+  return TPM_RC_SUCCESS;
+}
+
+TPM_RC
+TPM2_FlushContext (const TPMI_DH_CONTEXT handle)
+{
+  TPM_RC rc;
+  struct grub_tpm2_buffer in;
+  struct grub_tpm2_buffer out;
+  TPM_RC responseCode;
+
+  /* Marshal */
+  grub_tpm2_buffer_init (&in);
+  grub_tpm2_buffer_pack_u32 (&in, handle);
+  if (in.error)
+    return TPM_RC_FAILURE;
+
+  /* Submit */
+  grub_tpm2_buffer_init (&out);
+  rc = grub_tpm2_submit_command (TPM_ST_NO_SESSIONS, TPM_CC_FlushContext,
+				 &responseCode, &in, &out);
+  if (rc != TPM_RC_SUCCESS)
+    return rc;
+  if (responseCode != TPM_RC_SUCCESS)
+    return responseCode;
+
+  /* Unmarshal*/
+  if (out.error)
+    return TPM_RC_FAILURE;
+
+  return TPM_RC_SUCCESS;
+}
+
+TPM_RC
+TPM2_PCR_Read (const TPMS_AUTH_COMMAND *authCommand,
+	       const TPML_PCR_SELECTION  *pcrSelectionIn,
+	       grub_uint32_t *pcrUpdateCounter,
+	       TPML_PCR_SELECTION *pcrSelectionOut,
+	       TPML_DIGEST *pcrValues,
+	       TPMS_AUTH_RESPONSE *authResponse)
+{
+  TPM_RC rc;
+  struct grub_tpm2_buffer in;
+  struct grub_tpm2_buffer out;
+  grub_uint32_t pcrUpdateCounterTmp;
+  TPML_PCR_SELECTION pcrSelectionOutTmp;
+  TPML_DIGEST pcrValuesTmp;
+  TPMS_AUTH_RESPONSE authResponseTmp;
+  TPMI_ST_COMMAND_TAG tag = authCommand ? TPM_ST_SESSIONS : TPM_ST_NO_SESSIONS;
+  TPM_RC responseCode;
+  grub_uint32_t parameterSize;
+
+  if (!pcrSelectionIn)
+    return TPM_RC_VALUE;
+
+  if (!pcrUpdateCounter)
+    pcrUpdateCounter = &pcrUpdateCounterTmp;
+  if (!pcrSelectionOut)
+    pcrSelectionOut = &pcrSelectionOutTmp;
+  if (!pcrValues)
+    pcrValues = &pcrValuesTmp;
+  if (!authResponse)
+    authResponse = &authResponseTmp;
+
+  /* Marshal */
+  grub_tpm2_buffer_init (&in);
+  if (authCommand)
+    grub_tpm2_mu_TPMS_AUTH_COMMAND_Marshal (&in, authCommand);
+  grub_tpm2_mu_TPML_PCR_SELECTION_Marshal (&in, pcrSelectionIn);
+  if (in.error)
+    return TPM_RC_FAILURE;
+
+  /* Submit */
+  grub_tpm2_buffer_init (&out);
+  rc = grub_tpm2_submit_command (tag, TPM_CC_PCR_Read, &responseCode, &in,
+				 &out);
+  if (rc != TPM_RC_SUCCESS)
+    return rc;
+  if (responseCode != TPM_RC_SUCCESS)
+    return responseCode;
+
+  /* Unmarshal*/
+  if (tag == TPM_ST_SESSIONS)
+    grub_tpm2_buffer_unpack_u32 (&out, &parameterSize);
+  grub_tpm2_buffer_unpack_u32 (&out, pcrUpdateCounter);
+  grub_tpm2_mu_TPML_PCR_SELECTION_Unmarshal (&out, pcrSelectionOut);
+  grub_tpm2_mu_TPML_DIGEST_Unmarshal (&out, pcrValues);
+  if (tag == TPM_ST_SESSIONS)
+    grub_tpm2_mu_TPMS_AUTH_RESPONSE_Unmarshal (&out, authResponse);
+  if (out.error)
+    return TPM_RC_FAILURE;
+
+  return TPM_RC_SUCCESS;
+}
+
+TPM_RC
+TPM2_PolicyGetDigest (const TPMI_SH_POLICY policySession,
+		      const TPMS_AUTH_COMMAND *authCommand,
+		      TPM2B_DIGEST *policyDigest,
+		      TPMS_AUTH_RESPONSE *authResponse)
+{
+  TPM_RC rc;
+  struct grub_tpm2_buffer in;
+  struct grub_tpm2_buffer out;
+  TPMS_AUTH_RESPONSE authResponseTmp;
+  TPM2B_DIGEST policyDigestTmp;
+  TPMI_ST_COMMAND_TAG tag = authCommand ? TPM_ST_SESSIONS : TPM_ST_NO_SESSIONS;
+  TPM_RC responseCode;
+  grub_uint32_t parameterSize;
+
+  if (!authResponse)
+    authResponse = &authResponseTmp;
+  if (!policyDigest)
+    policyDigest = &policyDigestTmp;
+
+  grub_memset (authResponse, 0, sizeof (*authResponse));
+  grub_memset (policyDigest, 0, sizeof (*policyDigest));
+
+  /* Submit */
+  grub_tpm2_buffer_init (&in);
+  grub_tpm2_buffer_pack_u32 (&in, policySession);
+  if (tag == TPM_ST_SESSIONS)
+    grub_tpm2_mu_TPMS_AUTH_COMMAND_Marshal (&in, authCommand);
+  if (in.error)
+    return TPM_RC_FAILURE;
+
+  /* Submit */
+  grub_tpm2_buffer_init (&out);
+  rc = grub_tpm2_submit_command (tag, TPM_CC_PolicyGetDigest, &responseCode,
+				 &in, &out);
+  if (rc != TPM_RC_SUCCESS)
+    return rc;
+  if (responseCode != TPM_RC_SUCCESS)
+    return responseCode;
+
+  /* Unmarshal*/
+  if (tag == TPM_ST_SESSIONS)
+    grub_tpm2_buffer_unpack_u32 (&out, &parameterSize);
+  grub_tpm2_mu_TPM2B_Unmarshal (&out, (TPM2B*)policyDigest);
+  if (tag == TPM_ST_SESSIONS)
+    grub_tpm2_mu_TPMS_AUTH_RESPONSE_Unmarshal (&out, authResponse);
+  if (out.error)
+    return TPM_RC_FAILURE;
+
+  return TPM_RC_SUCCESS;
+}
+
+TPM_RC
+TPM2_Create (const TPMI_DH_OBJECT parentHandle,
+	     const TPMS_AUTH_COMMAND *authCommand,
+	     const TPM2B_SENSITIVE_CREATE *inSensitive,
+	     const TPM2B_PUBLIC *inPublic,
+	     const TPM2B_DATA *outsideInfo,
+	     const TPML_PCR_SELECTION *creationPCR,
+	     TPM2B_PRIVATE *outPrivate,
+	     TPM2B_PUBLIC *outPublic,
+	     TPM2B_CREATION_DATA *creationData,
+	     TPM2B_DIGEST *creationHash,
+	     TPMT_TK_CREATION *creationTicket,
+	     TPMS_AUTH_RESPONSE *authResponse)
+{
+  struct grub_tpm2_buffer in;
+  struct grub_tpm2_buffer out;
+  TPM2B_PUBLIC outPublicTmp;
+  TPM2B_PRIVATE outPrivateTmp;
+  TPM2B_CREATION_DATA creationDataTmp;
+  TPM2B_DIGEST creationHashTmp;
+  TPMT_TK_CREATION creationTicketTmp;
+  TPMS_AUTH_RESPONSE authResponseTmp;
+  TPMI_ST_COMMAND_TAG tag = authCommand ? TPM_ST_SESSIONS:TPM_ST_NO_SESSIONS;
+  TPM_RC responseCode;
+  TPM_RC rc;
+  grub_uint32_t parameterSize;
+
+  if (!inSensitive || !inPublic || !outsideInfo || !creationPCR)
+    return TPM_RC_VALUE;
+
+  if (!outPrivate)
+    outPrivate = &outPrivateTmp;
+  if (!outPublic)
+    outPublic = &outPublicTmp;
+  if (!creationData)
+    creationData = &creationDataTmp;
+  if (!creationHash)
+    creationHash = &creationHashTmp;
+  if (!creationTicket)
+    creationTicket = &creationTicketTmp;
+  if (!authResponse)
+    authResponse = &authResponseTmp;
+
+  grub_memset (outPrivate, 0, sizeof (*outPrivate));
+  grub_memset (outPublic, 0, sizeof (*outPublic));
+  grub_memset (creationData, 0, sizeof (*creationData));
+  grub_memset (creationHash, 0, sizeof (*creationHash));
+  grub_memset (creationTicket, 0, sizeof (*creationTicket));
+  grub_memset (authResponse, 0, sizeof (*authResponse));
+
+  /* Marshal */
+  grub_tpm2_buffer_init (&in);
+  grub_tpm2_buffer_pack_u32 (&in, parentHandle);
+  if (authCommand)
+    grub_tpm2_mu_TPMS_AUTH_COMMAND_Marshal (&in, authCommand);
+  grub_tpm2_mu_TPM2B_SENSITIVE_CREATE_Marshal (&in, inSensitive);
+  grub_tpm2_mu_TPM2B_PUBLIC_Marshal (&in, inPublic);
+  grub_tpm2_mu_TPM2B_Marshal (&in, outsideInfo->size, outsideInfo->buffer);
+  grub_tpm2_mu_TPML_PCR_SELECTION_Marshal (&in, creationPCR);
+  if (in.error)
+    return TPM_RC_FAILURE;
+
+  /* Submit */
+  grub_tpm2_buffer_init (&out);
+  rc = grub_tpm2_submit_command (tag, TPM_CC_Create, &responseCode, &in,
+				 &out);
+  if (rc != TPM_RC_SUCCESS)
+    return rc;
+  if (responseCode != TPM_RC_SUCCESS)
+    return responseCode;
+
+  /* Unmarshal*/
+  if (tag == TPM_ST_SESSIONS)
+   grub_tpm2_buffer_unpack_u32 (&out, &parameterSize);
+  grub_tpm2_mu_TPM2B_Unmarshal (&out, (TPM2B*)outPrivate);
+  grub_tpm2_mu_TPM2B_PUBLIC_Unmarshal (&out, outPublic);
+  grub_tpm2_mu_TPM2B_Unmarshal (&out, (TPM2B*)creationData);
+  grub_tpm2_mu_TPM2B_Unmarshal (&out, (TPM2B*)creationHash);
+  grub_tpm2_mu_TPMT_TK_CREATION_Unmarshal (&out, creationTicket);
+  if (tag == TPM_ST_SESSIONS)
+    grub_tpm2_mu_TPMS_AUTH_RESPONSE_Unmarshal(&out, authResponse);
+  if (out.error)
+    return TPM_RC_FAILURE;
+
+  return TPM_RC_SUCCESS;
+}
+
+TPM_RC
+TPM2_EvictControl (const TPMI_RH_PROVISION auth,
+		   const TPMI_DH_OBJECT objectHandle,
+		   const TPMS_AUTH_COMMAND *authCommand,
+		   const TPMI_DH_PERSISTENT persistentHandle,
+		   TPMS_AUTH_RESPONSE *authResponse)
+{
+  struct grub_tpm2_buffer in;
+  struct grub_tpm2_buffer out;
+  TPMS_AUTH_RESPONSE authResponseTmp;
+  TPMI_ST_COMMAND_TAG tag = authCommand ? TPM_ST_SESSIONS : TPM_ST_NO_SESSIONS;
+  TPM_RC responseCode;
+  TPM_RC rc;
+  grub_uint32_t parameterSize;
+
+  if (!authResponse)
+    authResponse = &authResponseTmp;
+
+  grub_memset (authResponse, 0, sizeof (*authResponse));
+
+  /* Marshal */
+  grub_tpm2_buffer_init (&in);
+  grub_tpm2_buffer_pack_u32 (&in, auth);
+  grub_tpm2_buffer_pack_u32 (&in, objectHandle);
+  if (authCommand)
+    grub_tpm2_mu_TPMS_AUTH_COMMAND_Marshal (&in, authCommand);
+  grub_tpm2_buffer_pack_u32 (&in, persistentHandle);
+  if (in.error)
+    return TPM_RC_FAILURE;
+
+  /* Submit */
+  grub_tpm2_buffer_init (&out);
+  rc = grub_tpm2_submit_command (tag, TPM_CC_EvictControl, &responseCode, &in,
+				 &out);
+  if (rc != TPM_RC_SUCCESS)
+    return rc;
+  if (responseCode != TPM_RC_SUCCESS)
+    return responseCode;
+
+  /* Unmarshal*/
+  if (tag == TPM_ST_SESSIONS)
+    {
+      grub_tpm2_buffer_unpack_u32 (&out, &parameterSize);
+      grub_tpm2_mu_TPMS_AUTH_RESPONSE_Unmarshal(&out, authResponse);
+    }
+  if (out.error)
+    return TPM_RC_FAILURE;
+
+  return TPM_RC_SUCCESS;
+}
diff --git a/include/grub/tpm2/buffer.h b/include/grub/tpm2/buffer.h
new file mode 100644
index 000000000..87dcd8d6c
--- /dev/null
+++ b/include/grub/tpm2/buffer.h
@@ -0,0 +1,65 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2022 Microsoft Corporation
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GRUB_TPM2_BUFFER_HEADER
+#define GRUB_TPM2_BUFFER_HEADER 1
+
+#include <grub/types.h>
+
+#define GRUB_TPM2_BUFFER_CAPACITY 4096
+
+struct grub_tpm2_buffer
+{
+  grub_uint8_t data[GRUB_TPM2_BUFFER_CAPACITY];
+  grub_size_t size;
+  grub_size_t offset;
+  grub_size_t cap;
+  int error;
+};
+typedef struct grub_tpm2_buffer *grub_tpm2_buffer_t;
+
+void
+grub_tpm2_buffer_init (grub_tpm2_buffer_t buffer);
+
+void
+grub_tpm2_buffer_pack (grub_tpm2_buffer_t buffer, const void* data,
+		       grub_size_t size);
+
+void
+grub_tpm2_buffer_pack_u8 (grub_tpm2_buffer_t buffer, grub_uint8_t value);
+
+void
+grub_tpm2_buffer_pack_u16 (grub_tpm2_buffer_t buffer, grub_uint16_t value);
+
+void
+grub_tpm2_buffer_pack_u32 (grub_tpm2_buffer_t buffer, grub_uint32_t value);
+
+void
+grub_tpm2_buffer_unpack (grub_tpm2_buffer_t buffer, void* data,
+			 grub_size_t size);
+
+void
+grub_tpm2_buffer_unpack_u8 (grub_tpm2_buffer_t buffer, grub_uint8_t* value);
+
+void
+grub_tpm2_buffer_unpack_u16 (grub_tpm2_buffer_t buffer, grub_uint16_t* value);
+
+void
+grub_tpm2_buffer_unpack_u32 (grub_tpm2_buffer_t buffer, grub_uint32_t* value);
+
+#endif /* ! GRUB_TPM2_BUFFER_HEADER */
diff --git a/include/grub/tpm2/internal/functions.h b/include/grub/tpm2/internal/functions.h
new file mode 100644
index 000000000..9380f26a2
--- /dev/null
+++ b/include/grub/tpm2/internal/functions.h
@@ -0,0 +1,117 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2022 Microsoft Corporation
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GRUB_TPM2_INTERNAL_FUNCTIONS_HEADER
+#define GRUB_TPM2_INTERNAL_FUNCTIONS_HEADER 1
+
+#include <grub/tpm2/internal/structs.h>
+
+TPM_RC
+TPM2_CreatePrimary (const TPMI_RH_HIERARCHY primaryHandle,
+		    const TPMS_AUTH_COMMAND *authCommand,
+		    const TPM2B_SENSITIVE_CREATE *inSensitive,
+		    const TPM2B_PUBLIC *inPublic,
+		    const TPM2B_DATA *outsideInfo,
+		    const TPML_PCR_SELECTION *creationPCR,
+		    TPM_HANDLE *objectHandle,
+		    TPM2B_PUBLIC *outPublic,
+		    TPM2B_CREATION_DATA *creationData,
+		    TPM2B_DIGEST *creationHash,
+		    TPMT_TK_CREATION *creationTicket,
+		    TPM2B_NAME *name,
+		    TPMS_AUTH_RESPONSE *authResponse);
+
+TPM_RC
+TPM2_StartAuthSession (const TPMI_DH_OBJECT tpmKey,
+		       const TPMI_DH_ENTITY bind,
+		       const TPMS_AUTH_COMMAND *authCommand,
+		       const TPM2B_NONCE *nonceCaller,
+		       const TPM2B_ENCRYPTED_SECRET *encryptedSalt,
+		       const TPM_SE sessionType,
+		       const TPMT_SYM_DEF *symmetric,
+		       const TPMI_ALG_HASH authHash,
+		       TPMI_SH_AUTH_SESSION *sessionHandle,
+		       TPM2B_NONCE *nonceTpm,
+		       TPMS_AUTH_RESPONSE *authResponse);
+
+TPM_RC
+TPM2_PolicyPCR (const TPMI_SH_POLICY policySession,
+		const TPMS_AUTH_COMMAND *authCommand,
+		const TPM2B_DIGEST *pcrDigest,
+		const TPML_PCR_SELECTION *pcrs,
+		TPMS_AUTH_RESPONSE *authResponse);
+
+TPM_RC
+TPM2_ReadPublic (const TPMI_DH_OBJECT objectHandle,
+		 const TPMS_AUTH_COMMAND* authCommand,
+		 TPM2B_PUBLIC *outPublic);
+
+TPM_RC
+TPM2_Load (const TPMI_DH_OBJECT parent_handle,
+	   const TPMS_AUTH_COMMAND *authCommand,
+	   const TPM2B_PRIVATE *inPrivate,
+	   const TPM2B_PUBLIC *inPublic,
+	   TPM_HANDLE *objectHandle,
+	   TPM2B_NAME *name,
+	   TPMS_AUTH_RESPONSE *authResponse);
+
+TPM_RC
+TPM2_Unseal (const TPMI_DH_OBJECT item_handle,
+	     const TPMS_AUTH_COMMAND *authCommand,
+	     TPM2B_SENSITIVE_DATA *outData,
+	     TPMS_AUTH_RESPONSE *authResponse);
+
+TPM_RC
+TPM2_FlushContext (const TPMI_DH_CONTEXT handle);
+
+TPM_RC
+TPM2_PCR_Read (const TPMS_AUTH_COMMAND *authCommand,
+	       const TPML_PCR_SELECTION *pcrSelectionIn,
+	       grub_uint32_t *pcrUpdateCounter,
+	       TPML_PCR_SELECTION *pcrSelectionOut,
+	       TPML_DIGEST *pcrValues,
+	       TPMS_AUTH_RESPONSE *authResponse);
+
+TPM_RC
+TPM2_PolicyGetDigest (const TPMI_SH_POLICY policySession,
+		      const TPMS_AUTH_COMMAND *authCommand,
+		      TPM2B_DIGEST *policyDigest,
+		      TPMS_AUTH_RESPONSE *authResponse);
+
+TPM_RC
+TPM2_Create (const TPMI_DH_OBJECT parentHandle,
+	     const TPMS_AUTH_COMMAND *authCommand,
+	     const TPM2B_SENSITIVE_CREATE *inSensitive,
+	     const TPM2B_PUBLIC *inPublic,
+	     const TPM2B_DATA *outsideInfo,
+	     const TPML_PCR_SELECTION *creationPCR,
+	     TPM2B_PRIVATE *outPrivate,
+	     TPM2B_PUBLIC *outPublic,
+	     TPM2B_CREATION_DATA *creationData,
+	     TPM2B_DIGEST *creationHash,
+	     TPMT_TK_CREATION *creationTicket,
+	     TPMS_AUTH_RESPONSE *authResponse);
+
+TPM_RC
+TPM2_EvictControl (const TPMI_RH_PROVISION auth,
+		   const TPMI_DH_OBJECT objectHandle,
+		   const TPMS_AUTH_COMMAND *authCommand,
+		   const TPMI_DH_PERSISTENT persistentHandle,
+		   TPMS_AUTH_RESPONSE *authResponse);
+
+#endif /* ! GRUB_TPM2_INTERNAL_FUNCTIONS_HEADER */
diff --git a/include/grub/tpm2/internal/structs.h b/include/grub/tpm2/internal/structs.h
new file mode 100644
index 000000000..72d71eb70
--- /dev/null
+++ b/include/grub/tpm2/internal/structs.h
@@ -0,0 +1,675 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2022 Microsoft Corporation
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GRUB_TPM2_INTERNAL_STRUCTS_HEADER
+#define GRUB_TPM2_INTERNAL_STRUCTS_HEADER 1
+
+#include <grub/tpm2/internal/types.h>
+
+/* TPMS_TAGGED_PROPERTY Structure */
+struct TPMS_TAGGED_PROPERTY
+{
+  TPM_PT property;
+  grub_uint32_t value;
+};
+typedef struct TPMS_TAGGED_PROPERTY TPMS_TAGGED_PROPERTY;
+
+/* TPML_TAGGED_TPM_PROPERTY Structure */
+struct TPML_TAGGED_TPM_PROPERTY
+{
+  grub_uint32_t count;
+  TPMS_TAGGED_PROPERTY tpmProperty[TPM_MAX_TPM_PROPERTIES];
+};
+typedef struct TPML_TAGGED_TPM_PROPERTY TPML_TAGGED_TPM_PROPERTY;
+
+/* TPMU_CAPABILITIES Structure */
+union TPMU_CAPABILITIES
+{
+  TPML_TAGGED_TPM_PROPERTY tpmProperties;
+};
+typedef union TPMU_CAPABILITIES TPMU_CAPABILITIES;
+
+/* TPMS_CAPABILITY_DATA Structure */
+struct TPMS_CAPABILITY_DATA
+{
+  TPM_CAP capability;
+  TPMU_CAPABILITIES data;
+};
+typedef struct TPMS_CAPABILITY_DATA TPMS_CAPABILITY_DATA;
+
+/* TPMS_PCR_SELECT Structure */
+struct TPMS_PCR_SELECT
+{
+  grub_uint8_t sizeOfSelect;
+  grub_uint8_t pcrSelect[TPM_PCR_SELECT_MAX];
+};
+typedef struct TPMS_PCR_SELECT TPMS_PCR_SELECT;
+
+/* TPMS_PCR_SELECTION Structure */
+struct TPMS_PCR_SELECTION
+{
+  TPMI_ALG_HASH hash;
+  grub_uint8_t sizeOfSelect;
+  grub_uint8_t pcrSelect[TPM_PCR_SELECT_MAX];
+};
+typedef struct TPMS_PCR_SELECTION TPMS_PCR_SELECTION;
+
+static inline void TPMS_PCR_SELECTION_SelectPCR(TPMS_PCR_SELECTION* self, grub_uint32_t n)
+{
+  self->pcrSelect[(n / 8)] |= (1 << (n % 8));
+}
+
+/* TPML_PCR_SELECTION Structure */
+struct TPML_PCR_SELECTION
+{
+  grub_uint32_t count;
+  TPMS_PCR_SELECTION pcrSelections[TPM_NUM_PCR_BANKS];
+};
+typedef struct TPML_PCR_SELECTION TPML_PCR_SELECTION;
+
+/* TPMU_HA Structure */
+union TPMU_HA
+{
+  grub_uint8_t sha1[TPM_SHA1_DIGEST_SIZE];
+  grub_uint8_t sha256[TPM_SHA256_DIGEST_SIZE];
+  grub_uint8_t sha384[TPM_SHA384_DIGEST_SIZE];
+  grub_uint8_t sha512[TPM_SHA512_DIGEST_SIZE];
+  grub_uint8_t sm3_256[TPM_SM3_256_DIGEST_SIZE];
+};
+typedef union TPMU_HA TPMU_HA;
+
+/* TPM2B Structure */
+struct TPM2B
+{
+  grub_uint16_t size;
+  grub_uint8_t buffer[1];
+};
+typedef struct TPM2B TPM2B;
+
+/* TPM2B_DIGEST Structure */
+struct TPM2B_DIGEST
+{
+  grub_uint16_t size;
+  grub_uint8_t buffer[sizeof(TPMU_HA)];
+};
+typedef struct TPM2B_DIGEST TPM2B_DIGEST;
+
+/* TPML_DIGEST Structure */
+struct TPML_DIGEST
+{
+  grub_uint32_t count;
+  TPM2B_DIGEST digests[8];
+};
+typedef struct TPML_DIGEST TPML_DIGEST;
+
+/* TPM2B_NONCE Type */
+typedef TPM2B_DIGEST TPM2B_NONCE;
+
+/* TPMA_SESSION Structure */
+struct TPMA_SESSION
+{
+  unsigned int continueSession:1;
+  unsigned int auditExclusive:1;
+  unsigned int auditReset:1;
+  unsigned int reserved1:2;
+  unsigned int decrypt:1;
+  unsigned int encrypt:1;
+  unsigned int audit:1;
+  unsigned int reserved:24;
+};
+typedef struct TPMA_SESSION TPMA_SESSION;
+
+/* TPM2B_AUTH Type */
+typedef TPM2B_DIGEST TPM2B_AUTH;
+
+/* TPMS_AUTH_COMMAND Structure */
+struct TPMS_AUTH_COMMAND
+{
+  TPMI_SH_AUTH_SESSION sessionHandle;
+  TPM2B_NONCE nonce;
+  TPMA_SESSION sessionAttributes;
+  TPM2B_AUTH hmac;
+};
+typedef struct TPMS_AUTH_COMMAND TPMS_AUTH_COMMAND;
+
+/* TPMS_AUTH_RESPONSE Structure */
+struct TPMS_AUTH_RESPONSE
+{
+  TPM2B_NONCE nonce;
+  TPMA_SESSION sessionAttributes;
+  TPM2B_AUTH hmac;
+};
+typedef struct TPMS_AUTH_RESPONSE TPMS_AUTH_RESPONSE;
+
+/* TPM2B_SENSITIVE_DATA Structure */
+struct TPM2B_SENSITIVE_DATA
+{
+  grub_uint16_t size;
+  grub_uint8_t buffer[TPM_MAX_SYM_DATA];
+};
+typedef struct TPM2B_SENSITIVE_DATA TPM2B_SENSITIVE_DATA;
+
+/* TPMS_SENSITIVE_CREATE Structure */
+struct TPMS_SENSITIVE_CREATE
+{
+  TPM2B_AUTH userAuth;
+  TPM2B_SENSITIVE_DATA data;
+};
+typedef struct TPMS_SENSITIVE_CREATE TPMS_SENSITIVE_CREATE;
+
+/* TPM2B_SENSITIVE_CREATE Structure */
+struct TPM2B_SENSITIVE_CREATE
+{
+  grub_uint16_t size;
+  TPMS_SENSITIVE_CREATE sensitive;
+};
+typedef struct TPM2B_SENSITIVE_CREATE TPM2B_SENSITIVE_CREATE;
+
+/* TPMA_OBJECT Structure */
+struct TPMA_OBJECT
+{
+  unsigned int reserved1:1;
+  unsigned int fixedTPM:1;
+  unsigned int stClear:1;
+  unsigned int reserved2:1;
+  unsigned int fixedParent:1;
+  unsigned int sensitiveDataOrigin:1;
+  unsigned int userWithAuth:1;
+  unsigned int adminWithPolicy:1;
+  unsigned int reserved3:2;
+  unsigned int noDA:1;
+  unsigned int encryptedDuplication:1;
+  unsigned int reserved4:4;
+  unsigned int restricted:1;
+  unsigned int decrypt:1;
+  unsigned int sign:1;
+  unsigned int reserved5:13;
+};
+typedef struct TPMA_OBJECT TPMA_OBJECT;
+
+/* TPMS_SCHEME_HASH Structure */
+struct TPMS_SCHEME_HASH
+{
+  TPMI_ALG_HASH hashAlg;
+};
+typedef struct TPMS_SCHEME_HASH TPMS_SCHEME_HASH;
+
+/* TPMS_SCHEME_HASH Types */
+typedef TPMS_SCHEME_HASH TPMS_KEY_SCHEME_ECDH;
+typedef TPMS_SCHEME_HASH TPMS_KEY_SCHEME_ECMQV;
+typedef TPMS_SCHEME_HASH TPMS_SIG_SCHEME_RSASSA;
+typedef TPMS_SCHEME_HASH TPMS_SIG_SCHEME_RSAPSS;
+typedef TPMS_SCHEME_HASH TPMS_SIG_SCHEME_ECDSA;
+typedef TPMS_SCHEME_HASH TPMS_SIG_SCHEME_ECDAA;
+typedef TPMS_SCHEME_HASH TPMS_SIG_SCHEME_SM2;
+typedef TPMS_SCHEME_HASH TPMS_SIG_SCHEME_ECSCHNORR;
+typedef TPMS_SCHEME_HASH TPMS_ENC_SCHEME_RSAES;
+typedef TPMS_SCHEME_HASH TPMS_ENC_SCHEME_OAEP;
+typedef TPMS_SCHEME_HASH TPMS_SCHEME_KDF2;
+typedef TPMS_SCHEME_HASH TPMS_SCHEME_MGF1;
+typedef TPMS_SCHEME_HASH TPMS_SCHEME_KDF1_SP800_56A;
+typedef TPMS_SCHEME_HASH TPMS_SCHEME_KDF2;
+typedef TPMS_SCHEME_HASH TPMS_SCHEME_KDF1_SP800_108;
+
+/* TPMS_SCHEME_HMAC Type */
+typedef TPMS_SCHEME_HASH TPMS_SCHEME_HMAC;
+
+/* TPMS_SCHEME_XOR Structure */
+struct TPMS_SCHEME_XOR
+{
+  TPMI_ALG_HASH hashAlg;
+  TPMI_ALG_KDF kdf;
+};
+typedef struct TPMS_SCHEME_XOR TPMS_SCHEME_XOR;
+
+/* TPMU_SCHEME_KEYEDHASH Union */
+union TPMU_SCHEME_KEYEDHASH
+{
+  TPMS_SCHEME_HMAC hmac;
+  TPMS_SCHEME_XOR exclusiveOr;
+};
+typedef union TPMU_SCHEME_KEYEDHASH TPMU_SCHEME_KEYEDHASH;
+
+/* TPMT_KEYEDHASH_SCHEME Structure */
+struct TPMT_KEYEDHASH_SCHEME
+{
+  TPMI_ALG_KEYEDHASH_SCHEME scheme;
+  TPMU_SCHEME_KEYEDHASH details;
+};
+typedef struct TPMT_KEYEDHASH_SCHEME TPMT_KEYEDHASH_SCHEME;
+
+/* TPMS_KEYEDHASH_PARMS Structure */
+struct TPMS_KEYEDHASH_PARMS
+{
+  TPMT_KEYEDHASH_SCHEME scheme;
+};
+typedef struct TPMS_KEYEDHASH_PARMS TPMS_KEYEDHASH_PARMS;
+
+/* TPMU_SYM_KEY_BITS Union */
+union TPMU_SYM_KEY_BITS
+{
+  TPM_KEY_BITS aes;
+  TPM_KEY_BITS exclusiveOr;
+  TPM_KEY_BITS sm4;
+  TPM_KEY_BITS camellia;
+};
+typedef union TPMU_SYM_KEY_BITS TPMU_SYM_KEY_BITS;
+
+/* TPMU_SYM_MODE Union */
+union TPMU_SYM_MODE
+{
+  TPMI_ALG_SYM_MODE aes;
+  TPMI_ALG_SYM_MODE sm4;
+  TPMI_ALG_SYM_MODE camellia;
+  TPMI_ALG_SYM_MODE sym;
+};
+typedef union TPMU_SYM_MODE TPMU_SYM_MODE;
+
+/* TPMT_SYM_DEF_OBJECT Structure */
+struct TPMT_SYM_DEF_OBJECT
+{
+  TPMI_ALG_SYM_OBJECT algorithm;
+  TPMU_SYM_KEY_BITS keyBits;
+  TPMU_SYM_MODE mode;
+};
+typedef struct TPMT_SYM_DEF_OBJECT TPMT_SYM_DEF_OBJECT;
+
+/* TPMS_SYMCIPHER_PARMS Structure */
+struct TPMS_SYMCIPHER_PARMS
+{
+  TPMT_SYM_DEF_OBJECT sym;
+};
+typedef struct TPMS_SYMCIPHER_PARMS TPMS_SYMCIPHER_PARMS;
+
+/* TPMU_ASYM_SCHEME Union */
+union TPMU_ASYM_SCHEME
+{
+  TPMS_KEY_SCHEME_ECDH ecdh;
+  TPMS_KEY_SCHEME_ECMQV ecmqv;
+  TPMS_SIG_SCHEME_RSASSA rsassa;
+  TPMS_SIG_SCHEME_RSAPSS rsapss;
+  TPMS_SIG_SCHEME_ECDSA ecdsa;
+  TPMS_SIG_SCHEME_ECDAA ecdaa;
+  TPMS_SIG_SCHEME_SM2 sm2;
+  TPMS_SIG_SCHEME_ECSCHNORR ecschnorr;
+  TPMS_ENC_SCHEME_RSAES rsaes;
+  TPMS_ENC_SCHEME_OAEP oaep;
+  TPMS_SCHEME_HASH anySig;
+  unsigned char padding[4];
+};
+typedef union TPMU_ASYM_SCHEME TPMU_ASYM_SCHEME;
+
+/* TPMT_RSA_SCHEME Structure */
+struct TPMT_RSA_SCHEME
+{
+  TPMI_ALG_RSA_SCHEME scheme;
+  TPMU_ASYM_SCHEME details;
+};
+typedef struct TPMT_RSA_SCHEME TPMT_RSA_SCHEME;
+
+/* TPMS_RSA_PARMS Structure */
+struct TPMS_RSA_PARMS
+{
+  TPMT_SYM_DEF_OBJECT symmetric;
+  TPMT_RSA_SCHEME scheme;
+  TPM_KEY_BITS keyBits;
+  grub_uint32_t exponent;
+};
+typedef struct TPMS_RSA_PARMS TPMS_RSA_PARMS;
+
+/* TPMT_ECC_SCHEME Structure */
+struct TPMT_ECC_SCHEME
+{
+  TPMI_ALG_ECC_SCHEME scheme;
+  TPMU_ASYM_SCHEME details;
+};
+typedef struct TPMT_ECC_SCHEME TPMT_ECC_SCHEME;
+
+/* TPMU_KDF_SCHEME Union */
+union TPMU_KDF_SCHEME
+{
+  TPMS_SCHEME_MGF1 mgf1;
+  TPMS_SCHEME_KDF1_SP800_56A kdf1_sp800_56a;
+  TPMS_SCHEME_KDF2 kdf2;
+  TPMS_SCHEME_KDF1_SP800_108 kdf1_sp800_108;
+};
+typedef union TPMU_KDF_SCHEME TPMU_KDF_SCHEME;
+
+/* TPMT_KDF_SCHEME Structure */
+struct TPMT_KDF_SCHEME
+{
+  TPMI_ALG_KDF scheme;
+  TPMU_KDF_SCHEME details;
+};
+typedef struct TPMT_KDF_SCHEME TPMT_KDF_SCHEME;
+
+/* TPMS_ECC_PARMS Structure */
+struct TPMS_ECC_PARMS
+{
+  TPMT_SYM_DEF_OBJECT symmetric;
+  TPMT_ECC_SCHEME scheme;
+  TPMI_ECC_CURVE curveID;
+  TPMT_KDF_SCHEME kdf;
+};
+typedef struct TPMS_ECC_PARMS TPMS_ECC_PARMS;
+
+/* TPMT_ASYM_SCHEME Structure */
+struct TPMT_ASYM_SCHEME
+{
+  TPMI_ALG_ASYM_SCHEME scheme;
+  TPMU_ASYM_SCHEME details;
+};
+typedef struct TPMT_ASYM_SCHEME TPMT_ASYM_SCHEME;
+
+/* TPMS_ASYM_PARMS Structure */
+struct TPMS_ASYM_PARMS
+{
+  TPMT_SYM_DEF_OBJECT symmetric;
+  TPMT_ASYM_SCHEME scheme;
+};
+typedef struct TPMS_ASYM_PARMS TPMS_ASYM_PARMS;
+
+/* TPMU_PUBLIC_PARMS Union */
+union TPMU_PUBLIC_PARMS
+{
+  TPMS_KEYEDHASH_PARMS keyedHashDetail;
+  TPMS_SYMCIPHER_PARMS symDetail;
+  TPMS_RSA_PARMS rsaDetail;
+  TPMS_ECC_PARMS eccDetail;
+  TPMS_ASYM_PARMS asymDetail;
+};
+typedef union TPMU_PUBLIC_PARMS TPMU_PUBLIC_PARMS;
+
+/* TPM2B_PUBLIC_KEY_RSA Structure */
+struct TPM2B_PUBLIC_KEY_RSA
+{
+  grub_uint16_t size;
+  grub_uint8_t buffer[TPM_MAX_RSA_KEY_BYTES];
+};
+typedef struct TPM2B_PUBLIC_KEY_RSA TPM2B_PUBLIC_KEY_RSA;
+
+/* TPM2B_ECC_PARAMETER Structure */
+struct TPM2B_ECC_PARAMETER
+{
+  grub_uint16_t size;
+  grub_uint8_t buffer[TPM_MAX_ECC_KEY_BYTES];
+};
+typedef struct TPM2B_ECC_PARAMETER TPM2B_ECC_PARAMETER;
+
+/* TPMS_ECC_POINT Structure */
+struct TPMS_ECC_POINT
+{
+  TPM2B_ECC_PARAMETER x;
+  TPM2B_ECC_PARAMETER y;
+};
+typedef struct TPMS_ECC_POINT TPMS_ECC_POINT;
+
+/* TPMU_ENCRYPTED_SECRET Union */
+union TPMU_ENCRYPTED_SECRET
+{
+  grub_uint8_t ecc[sizeof(TPMS_ECC_POINT)];
+  grub_uint8_t rsa[TPM_MAX_RSA_KEY_BYTES];
+  grub_uint8_t symmetric[sizeof(TPM2B_DIGEST)];
+  grub_uint8_t keyedHash[sizeof(TPM2B_DIGEST)];
+};
+typedef union TPMU_ENCRYPTED_SECRET TPMU_ENCRYPTED_SECRET;
+
+/* TPM2B_ENCRYPTED_SECRET Structure */
+struct TPM2B_ENCRYPTED_SECRET
+{
+  grub_uint16_t size;
+  grub_uint8_t secret[sizeof(TPMU_ENCRYPTED_SECRET)];
+};
+typedef struct TPM2B_ENCRYPTED_SECRET TPM2B_ENCRYPTED_SECRET;
+
+/* TPMU_PUBLIC_ID Union */
+union TPMU_PUBLIC_ID
+{
+  TPM2B_DIGEST keyedHash;
+  TPM2B_DIGEST sym;
+  TPM2B_PUBLIC_KEY_RSA rsa;
+  TPMS_ECC_POINT ecc;
+};
+typedef union TPMU_PUBLIC_ID TPMU_PUBLIC_ID;
+
+/* TPMT_PUBLIC Structure */
+struct TPMT_PUBLIC
+{
+  TPMI_ALG_PUBLIC type;
+  TPMI_ALG_HASH nameAlg;
+  TPMA_OBJECT objectAttributes;
+  TPM2B_DIGEST authPolicy;
+  TPMU_PUBLIC_PARMS parameters;
+  TPMU_PUBLIC_ID unique;
+};
+typedef struct TPMT_PUBLIC TPMT_PUBLIC;
+
+/* TPM2B_PUBLIC Structure */
+struct TPM2B_PUBLIC
+{
+  grub_uint16_t size;
+  TPMT_PUBLIC publicArea;
+};
+typedef struct TPM2B_PUBLIC TPM2B_PUBLIC;
+
+/* TPMT_HA Structure */
+struct TPMT_HA
+{
+  TPMI_ALG_HASH hashAlg;
+  TPMU_HA digest;
+};
+typedef struct TPMT_HA TPMT_HA;
+
+/* TPM2B_DATA Structure */
+struct TPM2B_DATA
+{
+  grub_uint16_t size;
+  grub_uint8_t buffer[sizeof(TPMT_HA)];
+};
+typedef struct TPM2B_DATA TPM2B_DATA;
+
+/* TPMA_LOCALITY Structure */
+struct TPMA_LOCALITY
+{
+  unsigned char TPM_LOC_ZERO:1;
+  unsigned char TPM_LOC_ONE:1;
+  unsigned char TPM_LOC_TWO:1;
+  unsigned char TPM_LOC_THREE:1;
+  unsigned char TPM_LOC_FOUR:1;
+  unsigned char Extended:3;
+};
+typedef struct TPMA_LOCALITY TPMA_LOCALITY;
+
+/* TPMU_NAME Union */
+union TPMU_NAME
+{
+  TPMT_HA digest;
+  TPM_HANDLE handle;
+};
+typedef union TPMU_NAME TPMU_NAME;
+
+/* TPM2B_NAME Structure */
+struct TPM2B_NAME
+{
+  grub_uint16_t size;
+  grub_uint8_t name[sizeof(TPMU_NAME)];
+};
+typedef struct TPM2B_NAME TPM2B_NAME;
+
+/* TPMS_CREATION_DATA Structure */
+struct TPMS_CREATION_DATA
+{
+  TPML_PCR_SELECTION pcrSelect;
+  TPM2B_DIGEST pcrDigest;
+  TPMA_LOCALITY locality;
+  TPM_ALG_ID parentNameAlg;
+  TPM2B_NAME parentName;
+  TPM2B_NAME parentQualifiedName;
+  TPM2B_DATA outsideInfo;
+};
+typedef struct TPMS_CREATION_DATA TPMS_CREATION_DATA;
+
+/* TPM2B_CREATION_DATA Structure */
+struct TPM2B_CREATION_DATA
+{
+  grub_uint16_t size;
+  TPMS_CREATION_DATA creationData;
+};
+typedef struct TPM2B_CREATION_DATA TPM2B_CREATION_DATA;
+
+/* TPMT_SYM_DEF Structure */
+struct TPMT_SYM_DEF
+{
+  TPMI_ALG_SYM algorithm;
+  TPMU_SYM_KEY_BITS keyBits;
+  TPMU_SYM_MODE mode;
+};
+typedef struct TPMT_SYM_DEF TPMT_SYM_DEF;
+
+/* TPM2B_MAX_BUFFER Structure */
+struct TPM2B_MAX_BUFFER
+{
+  grub_uint16_t size;
+  grub_uint8_t buffer[TPM_MAX_DIGEST_BUFFER];
+};
+typedef struct TPM2B_MAX_BUFFER TPM2B_MAX_BUFFER;
+
+/* TPMT_TK_HASHCHECK Structure */
+struct TPMT_TK_HASHCHECK
+{
+  TPM_ST tag;
+  TPMI_RH_HIERARCHY hierarchy;
+  TPM2B_DIGEST digest;
+};
+typedef struct TPMT_TK_HASHCHECK TPMT_TK_HASHCHECK;
+
+/* TPM2B_SYM_KEY Structure */
+struct TPM2B_SYM_KEY
+{
+  grub_uint16_t size;
+  grub_uint8_t buffer[TPM_MAX_SYM_KEY_BYTES];
+};
+typedef struct TPM2B_SYM_KEY TPM2B_SYM_KEY;
+
+/* TPM2B_PRIVATE_KEY_RSA Structure */
+struct TPM2B_PRIVATE_KEY_RSA
+{
+  grub_uint16_t size;
+  grub_uint8_t buffer[TPM_MAX_RSA_KEY_BYTES/2];
+};
+typedef struct TPM2B_PRIVATE_KEY_RSA TPM2B_PRIVATE_KEY_RSA;
+
+/* TPM2B_PRIVATE_VENDOR_SPECIFIC Structure */
+struct TPM2B_PRIVATE_VENDOR_SPECIFIC
+{
+  grub_uint16_t size;
+  grub_uint8_t buffer[TPM_PRIVATE_VENDOR_SPECIFIC_BYTES];
+};
+typedef struct TPM2B_PRIVATE_VENDOR_SPECIFIC TPM2B_PRIVATE_VENDOR_SPECIFIC;
+
+/* TPM2B_PRIVATE_VENDOR_SPECIFIC Union */
+union TPMU_SENSITIVE_COMPOSITE
+{
+  TPM2B_PRIVATE_KEY_RSA rsa;
+  TPM2B_ECC_PARAMETER ecc;
+  TPM2B_SENSITIVE_DATA bits;
+  TPM2B_SYM_KEY sym;
+  TPM2B_PRIVATE_VENDOR_SPECIFIC any;
+};
+typedef union TPMU_SENSITIVE_COMPOSITE TPMU_SENSITIVE_COMPOSITE;
+
+/* TPMT_SENSITIVE Structure */
+struct TPMT_SENSITIVE
+{
+  TPMI_ALG_PUBLIC sensitiveType;
+  TPM2B_AUTH authValue;
+  TPM2B_DIGEST seedValue;
+  TPMU_SENSITIVE_COMPOSITE sensitive;
+};
+typedef struct TPMT_SENSITIVE TPMT_SENSITIVE;
+
+/* TPM2B_SENSITIVE Structure */
+struct TPM2B_SENSITIVE
+{
+  grub_uint16_t size;
+  TPMT_SENSITIVE sensitiveArea;
+};
+typedef struct TPM2B_SENSITIVE TPM2B_SENSITIVE;
+
+/* _PRIVATE Structure */
+struct _PRIVATE
+{
+  TPM2B_DIGEST integrityOuter;
+  TPM2B_DIGEST integrityInner;
+  TPM2B_SENSITIVE sensitive;
+};
+typedef struct _PRIVATE _PRIVATE;
+
+/* TPM2B_PRIVATE Structure */
+struct TPM2B_PRIVATE
+{
+  grub_uint16_t size;
+  grub_uint8_t buffer[sizeof(_PRIVATE)];
+};
+typedef struct TPM2B_PRIVATE TPM2B_PRIVATE;
+
+/* TPML_DIGEST_VALUES Structure */
+struct TPML_DIGEST_VALUES
+{
+  grub_uint16_t count;
+  TPMT_HA digests[TPM_NUM_PCR_BANKS];
+};
+typedef struct TPML_DIGEST_VALUES TPML_DIGEST_VALUES;
+
+/* TPM2B_MAX_NV_BUFFER Structure */
+struct TPM2B_MAX_NV_BUFFER
+{
+  grub_uint16_t size;
+  grub_uint8_t buffer[TPM_MAX_NV_BUFFER_SIZE];
+};
+typedef struct TPM2B_MAX_NV_BUFFER TPM2B_MAX_NV_BUFFER;
+
+/* TPMS_NV_PUBLIC Structure */
+struct TPMS_NV_PUBLIC
+{
+    TPMI_RH_NV_INDEX nvIndex;
+    TPMI_ALG_HASH nameAlg;
+    TPMA_NV attributes;
+    TPM2B_DIGEST authPolicy;
+    grub_uint16_t dataSize;
+};
+typedef struct TPMS_NV_PUBLIC TPMS_NV_PUBLIC;
+
+/* TPM2B_NV_PUBLIC Structure */
+struct TPM2B_NV_PUBLIC
+{
+    grub_uint16_t size;
+    TPMS_NV_PUBLIC nvPublic;
+};
+typedef struct TPM2B_NV_PUBLIC TPM2B_NV_PUBLIC;
+
+/* TPMT_TK_CREATION Structure */
+struct TPMT_TK_CREATION
+{
+    TPM_ST tag;
+    TPMI_RH_HIERARCHY hierarchy;
+    TPM2B_DIGEST digest;
+};
+typedef struct TPMT_TK_CREATION TPMT_TK_CREATION;
+
+#endif /* ! GRUB_TPM2_INTERNAL_STRUCTS_HEADER */
diff --git a/include/grub/tpm2/internal/types.h b/include/grub/tpm2/internal/types.h
new file mode 100644
index 000000000..9118cad5d
--- /dev/null
+++ b/include/grub/tpm2/internal/types.h
@@ -0,0 +1,370 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2022 Microsoft Corporation
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GRUB_TPM2_INTERNAL_TYPES_HEADER
+#define GRUB_TPM2_INTERNAL_TYPES_HEADER 1
+
+#include <grub/types.h>
+
+/* TPM2_RC Constants */
+typedef grub_uint32_t TPM_RC;
+
+#define TPM_RC_1                 ((TPM_RC) 0x100)
+#define TPM_RC_2                 ((TPM_RC) 0x200)
+#define TPM_RC_3                 ((TPM_RC) 0x300)
+#define TPM_RC_4                 ((TPM_RC) 0x400)
+#define TPM_RC_5                 ((TPM_RC) 0x500)
+#define TPM_RC_6                 ((TPM_RC) 0x600)
+#define TPM_RC_7                 ((TPM_RC) 0x700)
+#define TPM_RC_8                 ((TPM_RC) 0x800)
+#define TPM_RC_9                 ((TPM_RC) 0x900)
+#define TPM_RC_A                 ((TPM_RC) 0xA00)
+#define TPM_RC_ASYMMETRIC        ((TPM_RC) 0x081)
+#define TPM_RC_ATTRIBUTES        ((TPM_RC) 0x082)
+#define TPM_RC_AUTH_CONTEXT      ((TPM_RC) 0x145)
+#define TPM_RC_AUTH_FAIL         ((TPM_RC) 0x08E)
+#define TPM_RC_AUTH_MISSING      ((TPM_RC) 0x125)
+#define TPM_RC_AUTHSIZE          ((TPM_RC) 0x144)
+#define TPM_RC_AUTH_TYPE         ((TPM_RC) 0x124)
+#define TPM_RC_AUTH_UNAVAILABLE  ((TPM_RC) 0x12F)
+#define TPM_RC_B                 ((TPM_RC) 0xB00)
+#define TPM_RC_BAD_AUTH          ((TPM_RC) 0x0A2)
+#define TPM_RC_BAD_CONTEXT       ((TPM_RC) 0x150)
+#define TPM_RC_BAD_TAG           ((TPM_RC) 0x01E)
+#define TPM_RC_BINDING           ((TPM_RC) 0x0A5)
+#define TPM_RC_C                 ((TPM_RC) 0xC00)
+#define TPM_RC_CANCELED          ((TPM_RC) 0x909)
+#define TPM_RC_COMMAND_CODE      ((TPM_RC) 0x143)
+#define TPM_RC_COMMAND_SIZE      ((TPM_RC) 0x142)
+#define TPM_RC_CONTEXT_GAP       ((TPM_RC) 0x901)
+#define TPM_RC_CPHASH            ((TPM_RC) 0x151)
+#define TPM_RC_CURVE             ((TPM_RC) 0x0A6)
+#define TPM_RC_D                 ((TPM_RC) 0xD00)
+#define TPM_RC_DISABLED          ((TPM_RC) 0x120)
+#define TPM_RC_E                 ((TPM_RC) 0xE00)
+#define TPM_RC_ECC_POINT         ((TPM_RC) 0x0A7)
+#define TPM_RC_EXCLUSIVE         ((TPM_RC) 0x121)
+#define TPM_RC_EXPIRED           ((TPM_RC) 0x0A3)
+#define TPM_RC_F                 ((TPM_RC) 0xF00)
+#define TPM_RC_FAILURE           ((TPM_RC) 0x101)
+#define TPM_RC_H                 ((TPM_RC) 0x000)
+#define TPM_RC_HANDLE            ((TPM_RC) 0x08B)
+#define TPM_RC_HASH              ((TPM_RC) 0x083)
+#define TPM_RC_HIERARCHY         ((TPM_RC) 0x085)
+#define TPM_RC_HMAC              ((TPM_RC) 0x119)
+#define TPM_RC_INITIALIZE        ((TPM_RC) 0x100)
+#define TPM_RC_INSUFFICIENT      ((TPM_RC) 0x09A)
+#define TPM_RC_INTEGRITY         ((TPM_RC) 0x09F)
+#define TPM_RC_KDF               ((TPM_RC) 0x08C)
+#define TPM_RC_KEY               ((TPM_RC) 0x09C)
+#define TPM_RC_KEY_SIZE          ((TPM_RC) 0x087)
+#define TPM_RC_LOCALITY          ((TPM_RC) 0x907)
+#define TPM_RC_LOCKOUT           ((TPM_RC) 0x921)
+#define TPM_RC_MEMORY            ((TPM_RC) 0x904)
+#define TPM_RC_MGF               ((TPM_RC) 0x088)
+#define TPM_RC_MODE              ((TPM_RC) 0x089)
+#define TPM_RC_NEEDS_TEST        ((TPM_RC) 0x153)
+#define TPM_RC_N_MASK            ((TPM_RC) 0xF00)
+#define TPM_RC_NONCE             ((TPM_RC) 0x08F)
+#define TPM_RC_NO_RESULT         ((TPM_RC) 0x154)
+#define TPM_RC_NOT_USED          ((TPM_RC) 0x97F)
+#define TPM_RC_NV_AUTHORIZATION  ((TPM_RC) 0x149)
+#define TPM_RC_NV_DEFINED        ((TPM_RC) 0x14C)
+#define TPM_RC_NV_LOCKED         ((TPM_RC) 0x148)
+#define TPM_RC_NV_RANGE          ((TPM_RC) 0x146)
+#define TPM_RC_NV_RATE           ((TPM_RC) 0x920)
+#define TPM_RC_NV_SIZE           ((TPM_RC) 0x147)
+#define TPM_RC_NV_SPACE          ((TPM_RC) 0x14B)
+#define TPM_RC_NV_UNAVAILABLE    ((TPM_RC) 0x923)
+#define TPM_RC_NV_UNINITIALIZED  ((TPM_RC) 0x14A)
+#define TPM_RC_OBJECT_HANDLES    ((TPM_RC) 0x906)
+#define TPM_RC_OBJECT_MEMORY     ((TPM_RC) 0x902)
+#define TPM_RC_P                 ((TPM_RC) 0x040)
+#define TPM_RC_PARENT            ((TPM_RC) 0x152)
+#define TPM_RC_PCR               ((TPM_RC) 0x127)
+#define TPM_RC_PCR_CHANGED       ((TPM_RC) 0x128)
+#define TPM_RC_POLICY            ((TPM_RC) 0x126)
+#define TPM_RC_POLICY_CC         ((TPM_RC) 0x0A4)
+#define TPM_RC_POLICY_FAIL       ((TPM_RC) 0x09D)
+#define TPM_RC_PP                ((TPM_RC) 0x090)
+#define TPM_RC_PRIVATE           ((TPM_RC) 0x10B)
+#define TPM_RC_RANGE             ((TPM_RC) 0x08D)
+#define TPM_RC_REBOOT            ((TPM_RC) 0x130)
+#define TPM_RC_REFERENCE_H0      ((TPM_RC) 0x910)
+#define TPM_RC_REFERENCE_H1      ((TPM_RC) 0x911)
+#define TPM_RC_REFERENCE_H2      ((TPM_RC) 0x912)
+#define TPM_RC_REFERENCE_H3      ((TPM_RC) 0x913)
+#define TPM_RC_REFERENCE_H4      ((TPM_RC) 0x914)
+#define TPM_RC_REFERENCE_H5      ((TPM_RC) 0x915)
+#define TPM_RC_REFERENCE_H6      ((TPM_RC) 0x916)
+#define TPM_RC_REFERENCE_S0      ((TPM_RC) 0x918)
+#define TPM_RC_REFERENCE_S1      ((TPM_RC) 0x919)
+#define TPM_RC_REFERENCE_S2      ((TPM_RC) 0x91A)
+#define TPM_RC_REFERENCE_S3      ((TPM_RC) 0x91B)
+#define TPM_RC_REFERENCE_S4      ((TPM_RC) 0x91C)
+#define TPM_RC_REFERENCE_S5      ((TPM_RC) 0x91D)
+#define TPM_RC_REFERENCE_S6      ((TPM_RC) 0x91E)
+#define TPM_RC_RESERVED_BITS     ((TPM_RC) 0x0A1)
+#define TPM_RC_RETRY             ((TPM_RC) 0x922)
+#define TPM_RC_S                 ((TPM_RC) 0x800)
+#define TPM_RC_SCHEME            ((TPM_RC) 0x092)
+#define TPM_RC_SELECTOR          ((TPM_RC) 0x098)
+#define TPM_RC_SENSITIVE         ((TPM_RC) 0x155)
+#define TPM_RC_SEQUENCE          ((TPM_RC) 0x103)
+#define TPM_RC_SESSION_HANDLES   ((TPM_RC) 0x905)
+#define TPM_RC_SESSION_MEMORY    ((TPM_RC) 0x903)
+#define TPM_RC_SIGNATURE         ((TPM_RC) 0x09B)
+#define TPM_RC_SIZE              ((TPM_RC) 0x095)
+#define TPM_RC_SUCCESS           ((TPM_RC) 0x000)
+#define TPM_RC_SYMMETRIC         ((TPM_RC) 0x096)
+#define TPM_RC_TAG               ((TPM_RC) 0x097)
+#define TPM_RC_TESTING           ((TPM_RC) 0x90A)
+#define TPM_RC_TICKET            ((TPM_RC) 0x0A0)
+#define TPM_RC_TOO_MANY_CONTEXTS ((TPM_RC) 0x12E)
+#define TPM_RC_TYPE              ((TPM_RC) 0x08A)
+#define TPM_RC_UNBALANCED        ((TPM_RC) 0x131)
+#define TPM_RC_UPGRADE           ((TPM_RC) 0x12D)
+#define TPM_RC_VALUE             ((TPM_RC) 0x084)
+#define TPM_RC_YIELDED           ((TPM_RC) 0x908)
+
+/* TPMA_NV Constants */
+typedef grub_uint32_t TPMA_NV;
+
+#define TPMA_NV_PPWRITE        ((TPMA_NV) 0x00000001)
+#define TPMA_NV_OWNERWRITE     ((TPMA_NV) 0x00000002)
+#define TPMA_NV_AUTHWRITE      ((TPMA_NV) 0x00000004)
+#define TPMA_NV_POLICYWRITE    ((TPMA_NV) 0x00000008)
+#define TPMA_NV_TPM2_NT_MASK   ((TPMA_NV) 0x000000F0)
+#define TPMA_NV_TPM2_NT_SHIFT  (4)
+#define TPMA_NV_RESERVED1_MASK ((TPMA_NV) 0x00000300)
+#define TPMA_NV_POLICY_DELETE  ((TPMA_NV) 0x00000400)
+#define TPMA_NV_WRITELOCKED    ((TPMA_NV) 0x00000800)
+#define TPMA_NV_WRITEALL       ((TPMA_NV) 0x00001000)
+#define TPMA_NV_WRITEDEFINE    ((TPMA_NV) 0x00002000)
+#define TPMA_NV_WRITE_STCLEAR  ((TPMA_NV) 0x00004000)
+#define TPMA_NV_GLOBALLOCK     ((TPMA_NV) 0x00008000)
+#define TPMA_NV_PPREAD         ((TPMA_NV) 0x00010000)
+#define TPMA_NV_OWNERREAD      ((TPMA_NV) 0x00020000)
+#define TPMA_NV_AUTHREAD       ((TPMA_NV) 0x00040000)
+#define TPMA_NV_POLICYREAD     ((TPMA_NV) 0x00080000)
+#define TPMA_NV_RESERVED2_MASK ((TPMA_NV) 0x01F00000)
+#define TPMA_NV_NO_DA          ((TPMA_NV) 0x02000000)
+#define TPMA_NV_ORDERLY        ((TPMA_NV) 0x04000000)
+#define TPMA_NV_CLEAR_STCLEAR  ((TPMA_NV) 0x08000000)
+#define TPMA_NV_READLOCKED     ((TPMA_NV) 0x10000000)
+#define TPMA_NV_WRITTEN        ((TPMA_NV) 0x20000000)
+#define TPMA_NV_PLATFORMCREATE ((TPMA_NV) 0x40000000)
+#define TPMA_NV_READ_STCLEAR   ((TPMA_NV) 0x80000000)
+
+/* TPM_ALG_ID Constants */
+typedef grub_uint16_t TPM_ALG_ID;
+
+#define TPM_ALG_ERROR          ((TPM_ALG_ID) 0x0000)
+#define TPM_ALG_AES            ((TPM_ALG_ID) 0x0006)
+#define TPM_ALG_CAMELLIA       ((TPM_ALG_ID) 0x0026)
+#define TPM_ALG_CBC            ((TPM_ALG_ID) 0x0042)
+#define TPM_ALG_CFB            ((TPM_ALG_ID) 0x0043)
+#define TPM_ALG_ECB            ((TPM_ALG_ID) 0x0044)
+#define TPM_ALG_ECC            ((TPM_ALG_ID) 0x0023)
+#define TPM_ALG_HMAC           ((TPM_ALG_ID) 0x0005)
+#define TPM_ALG_KDF1_SP800_108 ((TPM_ALG_ID) 0x0022)
+#define TPM_ALG_KDF1_SP800_56A ((TPM_ALG_ID) 0x0020)
+#define TPM_ALG_KDF2           ((TPM_ALG_ID) 0x0021)
+#define TPM_ALG_KEYEDHASH      ((TPM_ALG_ID) 0x0008)
+#define TPM_ALG_MGF1           ((TPM_ALG_ID) 0x0007)
+#define TPM_ALG_NULL           ((TPM_ALG_ID) 0x0010)
+#define TPM_ALG_RSA            ((TPM_ALG_ID) 0x0001)
+#define TPM_ALG_SHA1           ((TPM_ALG_ID) 0x0004)
+#define TPM_ALG_SHA256         ((TPM_ALG_ID) 0x000B)
+#define TPM_ALG_SHA384         ((TPM_ALG_ID) 0x000C)
+#define TPM_ALG_SHA512         ((TPM_ALG_ID) 0x000D)
+#define TPM_ALG_SM3_256        ((TPM_ALG_ID) 0x0012)
+#define TPM_ALG_SM4            ((TPM_ALG_ID) 0x0013)
+#define TPM_ALG_SYMCIPHER      ((TPM_ALG_ID) 0x0025)
+#define TPM_ALG_XOR            ((TPM_ALG_ID) 0x000A)
+
+/* TPM_CAP Constants */
+typedef grub_uint32_t TPM_CAP;
+
+#define TPM_CAP_FIRST           ((TPM_CAP) 0x00000000)
+#define TPM_CAP_ALGS            ((TPM_CAP) 0x00000000)
+#define TPM_CAP_HANDLES         ((TPM_CAP) 0x00000001)
+#define TPM_CAP_COMMANDS        ((TPM_CAP) 0x00000002)
+#define TPM_CAP_PP_COMMANDS     ((TPM_CAP) 0x00000003)
+#define TPM_CAP_AUDIT_COMMANDS  ((TPM_CAP) 0x00000004)
+#define TPM_CAP_PCRS            ((TPM_CAP) 0x00000005)
+#define TPM_CAP_TPM_PROPERTIES  ((TPM_CAP) 0x00000006)
+#define TPM_CAP_PCR_PROPERTIES  ((TPM_CAP) 0x00000007)
+#define TPM_CAP_ECC_CURVES      ((TPM_CAP) 0x00000008)
+#define TPM_CAP_LAST            ((TPM_CAP) 0x00000008)
+#define TPM_CAP_VENDOR_PROPERTY ((TPM_CAP) 0x00000100)
+
+/* TPM_PT Constants */
+typedef grub_uint32_t TPM_PT;
+
+#define TPM_PT_NONE             ((TPM_PT) 0x00000000)
+#define PT_GROUP                ((TPM_PT) 0x00000100)
+#define PT_FIXED                ((TPM_PT) (PT_GROUP * 1))
+#define TPM_PT_FAMILY_INDICATOR ((TPM_PT) (PT_FIXED + 0))
+#define TPM_PT_LEVEL            ((TPM_PT) (PT_FIXED + 1))
+#define TPM_PT_REVISION         ((TPM_PT) (PT_FIXED + 2))
+#define TPM_PT_DAY_OF_YEAR      ((TPM_PT) (PT_FIXED + 3))
+#define TPM_PT_YEAR             ((TPM_PT) (PT_FIXED + 4))
+#define TPM_PT_PCR_COUNT        ((TPM_PT) (PT_FIXED + 18))
+
+/* TPM_SE Constants */
+typedef grub_uint8_t TPM_SE;
+
+#define TPM_SE_HMAC   ((TPM_SE) 0x00)
+#define TPM_SE_POLICY ((TPM_SE) 0x01)
+#define TPM_SE_TRIAL  ((TPM_SE) 0x03)
+
+/* TPMI_YES_NO Constants */
+typedef grub_uint8_t TPMI_YES_NO;
+
+#define TPM_NO  ((TPMI_YES_NO)0)
+#define TPM_YES ((TPMI_YES_NO)1)
+
+/* TPM_ST Constants */
+typedef grub_uint16_t TPM_ST;
+typedef TPM_ST TPMI_ST_COMMAND_TAG;
+
+#define TPM_ST_NO_SESSIONS ((TPMI_ST_COMMAND_TAG) 0x8001)
+#define TPM_ST_SESSIONS    ((TPMI_ST_COMMAND_TAG) 0x8002)
+
+/* TPM_HANDLE Types */
+typedef grub_uint32_t TPM_HANDLE;
+
+typedef TPM_HANDLE TPMI_RH_HIERARCHY;
+typedef TPM_HANDLE TPMI_RH_LOCKOUT;
+typedef TPM_HANDLE TPMI_SH_AUTH_SESSION;
+typedef TPM_HANDLE TPMI_DH_CONTEXT;
+typedef TPM_HANDLE TPMI_DH_OBJECT;
+typedef TPM_HANDLE TPMI_DH_ENTITY;
+typedef TPM_HANDLE TPMI_SH_POLICY;
+typedef TPM_HANDLE TPMI_DH_PCR;
+typedef TPM_HANDLE TPMI_RH_NV_AUTH;
+typedef TPM_HANDLE TPMI_RH_NV_INDEX;
+
+/* TPM_RH Constants */
+typedef TPM_HANDLE TPM_RH;
+
+#define TPM_RH_FIRST       ((TPM_RH) 0x40000000)
+#define TPM_RH_SRK         ((TPM_RH) 0x40000000)
+#define TPM_RH_OWNER       ((TPM_RH) 0x40000001)
+#define TPM_RH_REVOKE      ((TPM_RH) 0x40000002)
+#define TPM_RH_TRANSPORT   ((TPM_RH) 0x40000003)
+#define TPM_RH_OPERATOR    ((TPM_RH) 0x40000004)
+#define TPM_RH_ADMIN       ((TPM_RH) 0x40000005)
+#define TPM_RH_EK          ((TPM_RH) 0x40000006)
+#define TPM_RH_NULL        ((TPM_RH) 0x40000007)
+#define TPM_RH_UNASSIGNED  ((TPM_RH) 0x40000008)
+#define TPM_RS_PW          ((TPM_RH) 0x40000009)
+#define TPM_RH_LOCKOUT     ((TPM_RH) 0x4000000A)
+#define TPM_RH_ENDORSEMENT ((TPM_RH) 0x4000000B)
+#define TPM_RH_PLATFORM    ((TPM_RH) 0x4000000C)
+#define TPM_RH_PLATFORM_NV ((TPM_RH) 0x4000000D)
+#define TPM_RH_AUTH_00     ((TPM_RH) 0x40000010)
+#define TPM_RH_AUTH_FF     ((TPM_RH) 0x4000010F)
+#define TPM_RH_LAST        ((TPM_RH) 0x4000010F)
+
+/* TPM_ECC_CURVE Constants */
+typedef grub_uint16_t TPM_ECC_CURVE;
+
+#define TPM_ECC_NONE      ((TPM_ECC_CURVE) 0x0000)
+#define TPM_ECC_NIST_P192 ((TPM_ECC_CURVE) 0x0001)
+#define TPM_ECC_NIST_P224 ((TPM_ECC_CURVE) 0x0002)
+#define TPM_ECC_NIST_P256 ((TPM_ECC_CURVE) 0x0003)
+#define TPM_ECC_NIST_P384 ((TPM_ECC_CURVE) 0x0004)
+#define TPM_ECC_NIST_P521 ((TPM_ECC_CURVE) 0x0005)
+#define TPM_ECC_BN_P256   ((TPM_ECC_CURVE) 0x0010)
+#define TPM_ECC_BN_P638   ((TPM_ECC_CURVE) 0x0011)
+#define TPM_ECC_SM2_P256  ((TPM_ECC_CURVE) 0x0020)
+
+/* TPM_CC Constants */
+typedef grub_uint32_t TPM_CC;
+
+#define TPM_CC_EvictControl     ((TPM_CC) 0x00000120)
+#define TPM_CC_CreatePrimary    ((TPM_CC) 0x00000131)
+#define TPM_CC_Create           ((TPM_CC) 0x00000153)
+#define TPM_CC_FlushContext     ((TPM_CC) 0x00000165)
+#define TPM_CC_ReadPublic       ((TPM_CC) 0x00000173)
+#define TPM_CC_StartAuthSession ((TPM_CC) 0x00000176)
+#define TPM_CC_PolicyPCR        ((TPM_CC) 0x0000017f)
+#define TPM_CC_NV_Read          ((TPM_CC) 0x0000014e)
+#define TPM_CC_NV_ReadPublic    ((TPM_CC) 0x00000169)
+#define TPM_CC_GetCapability    ((TPM_CC) 0x0000017a)
+#define TPM_CC_PCR_Read         ((TPM_CC) 0x0000017e)
+#define TPM_CC_Load             ((TPM_CC) 0x00000157)
+#define TPM_CC_Unseal           ((TPM_CC) 0x0000015e)
+#define TPM_CC_PolicyGetDigest  ((TPM_CC) 0x00000189)
+
+/* Hash algorithm sizes */
+#define TPM_SHA1_DIGEST_SIZE    20
+#define TPM_SHA256_DIGEST_SIZE  32
+#define TPM_SM3_256_DIGEST_SIZE 32
+#define TPM_SHA384_DIGEST_SIZE  48
+#define TPM_SHA512_DIGEST_SIZE  64
+
+/* Encryption algorithm sizes */
+#define TPM_MAX_SYM_BLOCK_SIZE 16
+#define TPM_MAX_SYM_DATA       256
+#define TPM_MAX_ECC_KEY_BYTES  128
+#define TPM_MAX_SYM_KEY_BYTES  32
+#define TPM_MAX_RSA_KEY_BYTES  512
+
+/* Buffer Size Constants */
+#define TPM_MAX_PCRS                      32
+#define TPM_NUM_PCR_BANKS                 16
+#define TPM_PCR_SELECT_MAX                ((TPM_MAX_PCRS + 7) / 8)
+#define TPM_MAX_DIGEST_BUFFER             1024
+#define TPM_MAX_TPM_PROPERTIES            8
+#define TPM_MAX_NV_BUFFER_SIZE            2048
+#define TPM_PRIVATE_VENDOR_SPECIFIC_BYTES 1280
+
+/* TPM_GENERATED Constants */
+typedef grub_uint32_t TPM_GENERATED;
+
+#define TPM_GENERATED_VALUE ((TPM_GENERATED) 0xff544347)
+
+/* TPM_ALG_ID Types */
+typedef TPM_ALG_ID TPMI_ALG_PUBLIC;
+typedef TPM_ALG_ID TPMI_ALG_HASH;
+typedef TPM_ALG_ID TPMI_ALG_KEYEDHASH_SCHEME;
+typedef TPM_ALG_ID TPMI_ALG_KDF;
+typedef TPM_ALG_ID TPMI_ALG_SYM_OBJECT;
+typedef TPM_ALG_ID TPMI_ALG_SYM_MODE;
+typedef TPM_ALG_ID TPMI_ALG_RSA_DECRYPT;
+typedef TPM_ALG_ID TPMI_ALG_ECC_SCHEME;
+typedef TPM_ALG_ID TPMI_ALG_ASYM_SCHEME;
+typedef TPM_ALG_ID TPMI_ALG_RSA_SCHEME;
+typedef TPM_ALG_ID TPMI_ALG_SYM;
+
+/* TPM_KEY_BITS Type */
+typedef grub_uint16_t TPM_KEY_BITS;
+
+/* TPM_ECC_CURVE Types */
+typedef TPM_ECC_CURVE TPMI_ECC_CURVE;
+
+/* TPMI_RH_PROVISION Type */
+typedef TPM_HANDLE TPMI_RH_PROVISION;
+
+/* TPMI_RH_PROVISION Type */
+typedef TPM_HANDLE TPMI_DH_PERSISTENT;
+
+#endif /* ! GRUB_TPM2_INTERNAL_TYPES_HEADER */
diff --git a/include/grub/tpm2/mu.h b/include/grub/tpm2/mu.h
new file mode 100644
index 000000000..c545976db
--- /dev/null
+++ b/include/grub/tpm2/mu.h
@@ -0,0 +1,292 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2022 Microsoft Corporation
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GRUB_TPM2_MU_HEADER
+#define GRUB_TPM2_MU_HEADER 1
+
+#include <grub/tpm2/buffer.h>
+#include <grub/tpm2/tpm2.h>
+
+void
+grub_tpm2_mu_TPMS_AUTH_COMMAND_Marshal (grub_tpm2_buffer_t buf,
+					const TPMS_AUTH_COMMAND* authCommand);
+
+void
+grub_tpm2_mu_TPM2B_Marshal (grub_tpm2_buffer_t buf,
+			    const grub_uint16_t size,
+			    const grub_uint8_t* buffer);
+
+void
+grub_tpm2_mu_TPMU_SYM_KEY_BITS_Marshal (grub_tpm2_buffer_t buf,
+					const TPMI_ALG_SYM_OBJECT algorithm,
+					const TPMU_SYM_KEY_BITS *p);
+
+void
+grub_tpm2_mu_TPMU_SYM_MODE_Marshal (grub_tpm2_buffer_t buf,
+				    const TPMI_ALG_SYM_OBJECT algorithm,
+				    const TPMU_SYM_MODE *p);
+
+void
+grub_tpm2_mu_TPMT_SYM_DEF_Marshal (grub_tpm2_buffer_t buf,
+				   const TPMT_SYM_DEF *p);
+
+void
+grub_tpm2_mu_TPMS_PCR_SELECTION_Marshal (grub_tpm2_buffer_t buf,
+					 const TPMS_PCR_SELECTION* pcrSelection);
+
+void
+grub_tpm2_mu_TPML_PCR_SELECTION_Marshal (grub_tpm2_buffer_t buf,
+					 const TPML_PCR_SELECTION* pcrSelection);
+
+void
+grub_tpm2_mu_TPMA_OBJECT_Marshal (grub_tpm2_buffer_t buf,
+				  const TPMA_OBJECT *p);
+
+void
+grub_tpm2_mu_TPMS_SCHEME_XOR_Marshal (grub_tpm2_buffer_t buf,
+				      const TPMS_SCHEME_XOR *p);
+
+void
+grub_tpm2_mu_TPMS_SCHEME_HMAC_Marshal (grub_tpm2_buffer_t buf,
+				       const TPMS_SCHEME_HMAC *p);
+
+void
+grub_tpm2_mu_TPMU_SCHEME_KEYEDHASH_Marshal (grub_tpm2_buffer_t buf,
+					    const TPMI_ALG_KEYEDHASH_SCHEME scheme,
+					    const TPMU_SCHEME_KEYEDHASH *p);
+
+void
+grub_tpm2_mu_TPMT_KEYEDHASH_SCHEME_Marshal (grub_tpm2_buffer_t buf,
+					    const TPMT_KEYEDHASH_SCHEME *p);
+
+void
+grub_tpm2_mu_TPMS_KEYEDHASH_PARMS_Marshal (grub_tpm2_buffer_t buf,
+					   const TPMS_KEYEDHASH_PARMS *p);
+
+void
+grub_tpm2_mu_TPMT_SYM_DEF_OBJECT_Marshal (grub_tpm2_buffer_t buf,
+					  const TPMT_SYM_DEF_OBJECT *p);
+
+void
+grub_tpm2_mu_TPMU_ASYM_SCHEME_Marshal (grub_tpm2_buffer_t buf,
+				       const TPMI_ALG_RSA_DECRYPT scheme,
+				       const TPMU_ASYM_SCHEME *p);
+
+void
+grub_tpm2_mu_TPMT_RSA_SCHEME_Marshal (grub_tpm2_buffer_t buf,
+				      const TPMT_RSA_SCHEME *p);
+
+void
+grub_tpm2_mu_TPMS_RSA_PARMS_Marshal (grub_tpm2_buffer_t buf,
+				     const TPMS_RSA_PARMS *p);
+
+void
+grub_tpm2_mu_TPMS_SYMCIPHER_PARMS_Marshal (grub_tpm2_buffer_t buf,
+					   const TPMS_SYMCIPHER_PARMS *p);
+
+void
+grub_tpm2_mu_TPMT_ECC_SCHEME_Marshal (grub_tpm2_buffer_t buf,
+				      const TPMT_ECC_SCHEME *p);
+
+void
+grub_tpm2_mu_TPMU_KDF_SCHEME_Marshal (grub_tpm2_buffer_t buf,
+				      const TPMI_ALG_KDF scheme,
+				      const TPMU_KDF_SCHEME *p);
+
+void
+grub_tpm2_mu_TPMT_KDF_SCHEME_Marshal (grub_tpm2_buffer_t buf,
+				      const TPMT_KDF_SCHEME *p);
+
+void
+grub_tpm2_mu_TPMS_ECC_PARMS_Marshal (grub_tpm2_buffer_t buf,
+				     const TPMS_ECC_PARMS *p);
+
+void
+grub_tpm2_mu_TPMU_PUBLIC_PARMS_Marshal (grub_tpm2_buffer_t buf,
+					const grub_uint32_t type,
+					const TPMU_PUBLIC_PARMS *p);
+
+void
+grub_tpm2_mu_TPMS_ECC_POINT_Marshal (grub_tpm2_buffer_t buf,
+				     const TPMS_ECC_POINT *p);
+
+void
+grub_tpm2_mu_TPMU_PUBLIC_ID_Marshal (grub_tpm2_buffer_t buf,
+				     const TPMI_ALG_PUBLIC type,
+				     const TPMU_PUBLIC_ID *p);
+
+void
+grub_tpm2_mu_TPMT_PUBLIC_Marshal (grub_tpm2_buffer_t buf,
+				  const TPMT_PUBLIC *p);
+
+void
+grub_tpm2_mu_TPM2B_PUBLIC_Marshal (grub_tpm2_buffer_t buf,
+				   const TPM2B_PUBLIC *p);
+
+void
+grub_tpm2_mu_TPMS_SENSITIVE_CREATE_Marshal (grub_tpm2_buffer_t buf,
+					    const TPMS_SENSITIVE_CREATE *p);
+
+void
+grub_tpm2_mu_TPM2B_SENSITIVE_CREATE_Marshal (grub_tpm2_buffer_t buf,
+					     const TPM2B_SENSITIVE_CREATE *sensitiveCreate);
+
+void
+grub_tpm2_mu_TPM2B_Unmarshal (grub_tpm2_buffer_t buf,
+			      TPM2B* p);
+
+void
+grub_tpm2_mu_TPMS_AUTH_RESPONSE_Unmarshal (grub_tpm2_buffer_t buf,
+					   TPMS_AUTH_RESPONSE* p);
+
+void
+grub_tpm2_mu_TPM2B_DIGEST_Unmarshal (grub_tpm2_buffer_t buf,
+				     TPM2B_DIGEST* digest);
+
+void
+grub_tpm2_mu_TPMA_OBJECT_Unmarshal (grub_tpm2_buffer_t buf,
+				    TPMA_OBJECT *p);
+
+void
+grub_tpm2_mu_TPMS_SCHEME_HMAC_Unmarshal (grub_tpm2_buffer_t buf,
+					 TPMS_SCHEME_HMAC *p);
+
+void
+grub_tpm2_mu_TPMS_SCHEME_XOR_Unmarshal (grub_tpm2_buffer_t buf,
+					TPMS_SCHEME_XOR *p);
+
+void
+grub_tpm2_mu_TPMU_SCHEME_KEYEDHASH_Unmarshal (grub_tpm2_buffer_t buf,
+					      TPMI_ALG_KEYEDHASH_SCHEME scheme,
+					      TPMU_SCHEME_KEYEDHASH *p);
+
+void
+grub_tpm2_mu_TPMT_KEYEDHASH_SCHEME_Unmarshal (grub_tpm2_buffer_t buf,
+					      TPMT_KEYEDHASH_SCHEME *p);
+
+void
+grub_tpm2_mu_TPMS_KEYEDHASH_PARMS_Unmarshal (grub_tpm2_buffer_t buf,
+					     TPMS_KEYEDHASH_PARMS *p);
+
+void
+grub_tpm2_mu_TPMU_SYM_KEY_BITS_Unmarshal (grub_tpm2_buffer_t buf,
+					  TPMI_ALG_SYM_OBJECT algorithm,
+					  TPMU_SYM_KEY_BITS *p);
+
+void
+grub_tpm2_mu_TPMU_SYM_MODE_Unmarshal (grub_tpm2_buffer_t buf,
+				      TPMI_ALG_SYM_OBJECT algorithm,
+				      TPMU_SYM_MODE *p);
+
+void
+grub_tpm2_mu_TPMT_SYM_DEF_OBJECT_Unmarshal (grub_tpm2_buffer_t buf,
+					    TPMT_SYM_DEF_OBJECT *p);
+
+void
+grub_tpm2_mu_TPMS_SYMCIPHER_PARMS_Unmarshal (grub_tpm2_buffer_t buf,
+					     TPMS_SYMCIPHER_PARMS *p);
+
+void
+grub_tpm2_mu_TPMU_ASYM_SCHEME_Unmarshal (grub_tpm2_buffer_t buf,
+					 TPMI_ALG_RSA_DECRYPT scheme,
+					 TPMU_ASYM_SCHEME *p);
+
+void
+grub_tpm2_mu_TPMT_RSA_SCHEME_Unmarshal (grub_tpm2_buffer_t buf,
+					TPMT_RSA_SCHEME *p);
+
+void
+grub_tpm2_mu_TPMS_RSA_PARMS_Unmarshal (grub_tpm2_buffer_t buf,
+				       TPMS_RSA_PARMS *p);
+
+void
+grub_tpm2_mu_TPMT_ECC_SCHEME_Unmarshal (grub_tpm2_buffer_t buf,
+					TPMT_ECC_SCHEME *p);
+
+void
+grub_tpm2_mu_TPMU_KDF_SCHEME_Unmarshal (grub_tpm2_buffer_t buf,
+					TPMI_ALG_KDF scheme,
+					TPMU_KDF_SCHEME *p);
+
+void
+grub_tpm2_mu_TPMT_KDF_SCHEME_Unmarshal (grub_tpm2_buffer_t buf,
+					TPMT_KDF_SCHEME *p);
+
+void
+grub_tpm2_mu_TPMS_ECC_PARMS_Unmarshal (grub_tpm2_buffer_t buf,
+				       TPMS_ECC_PARMS *p);
+
+void
+grub_tpm2_mu_TPMU_PUBLIC_PARMS_Unmarshal (grub_tpm2_buffer_t buf,
+					  grub_uint32_t type,
+					  TPMU_PUBLIC_PARMS *p);
+
+void
+grub_tpm2_mu_TPMS_ECC_POINT_Unmarshal (grub_tpm2_buffer_t buf,
+				       TPMS_ECC_POINT *p);
+
+void
+grub_tpm2_mu_TPMU_PUBLIC_ID_Unmarshal (grub_tpm2_buffer_t buf,
+				       TPMI_ALG_PUBLIC type,
+				       TPMU_PUBLIC_ID *p);
+
+void
+grub_tpm2_mu_TPMT_PUBLIC_Unmarshal (grub_tpm2_buffer_t buf,
+				    TPMT_PUBLIC *p);
+
+void
+grub_tpm2_mu_TPM2B_PUBLIC_Unmarshal (grub_tpm2_buffer_t buf,
+				     TPM2B_PUBLIC *p);
+
+void
+grub_tpm2_mu_TPMS_NV_PUBLIC_Unmarshal (grub_tpm2_buffer_t buf,
+				       TPMS_NV_PUBLIC *p);
+
+void
+grub_tpm2_mu_TPM2B_NV_PUBLIC_Unmarshal (grub_tpm2_buffer_t buf,
+					TPM2B_NV_PUBLIC *p);
+
+void
+grub_tpm2_mu_TPM2B_NAME_Unmarshal (grub_tpm2_buffer_t buf,
+				   TPM2B_NAME *n);
+
+void
+grub_tpm2_mu_TPMS_TAGGED_PROPERTY_Unmarshal (grub_tpm2_buffer_t buf,
+					     TPMS_TAGGED_PROPERTY* property);
+
+void
+grub_tpm2_mu_TPMS_CAPABILITY_DATA_tpmProperties_Unmarshal (grub_tpm2_buffer_t buf,
+							   TPMS_CAPABILITY_DATA* capabilityData);
+
+void
+grub_tpm2_mu_TPMT_TK_CREATION_Unmarshal (grub_tpm2_buffer_t buf,
+					 TPMT_TK_CREATION *p);
+
+void
+grub_tpm2_mu_TPMS_PCR_SELECTION_Unmarshal (grub_tpm2_buffer_t buf,
+					   TPMS_PCR_SELECTION* pcrSelection);
+
+void
+grub_tpm2_mu_TPML_PCR_SELECTION_Unmarshal (grub_tpm2_buffer_t buf,
+					   TPML_PCR_SELECTION* pcrSelection);
+
+void
+grub_tpm2_mu_TPML_DIGEST_Unmarshal (grub_tpm2_buffer_t buf,
+				    TPML_DIGEST* digest);
+
+#endif /* ! GRUB_TPM2_MU_HEADER */
diff --git a/include/grub/tpm2/tcg2.h b/include/grub/tpm2/tcg2.h
new file mode 100644
index 000000000..553b3fd93
--- /dev/null
+++ b/include/grub/tpm2/tcg2.h
@@ -0,0 +1,34 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2022 Microsoft Corporation
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GRUB_TPM2_TCG2_HEADER
+#define GRUB_TPM2_TCG2_HEADER 1
+
+#include <grub/err.h>
+#include <grub/types.h>
+
+grub_err_t
+grub_tcg2_get_max_output_size (grub_size_t *size);
+
+grub_err_t
+grub_tcg2_submit_command (grub_size_t input_size,
+			  grub_uint8_t *input,
+			  grub_size_t output_size,
+			  grub_uint8_t *output);
+
+#endif /* ! GRUB_TPM2_TCG2_HEADER */
diff --git a/include/grub/tpm2/tpm2.h b/include/grub/tpm2/tpm2.h
new file mode 100644
index 000000000..cfdc9edcd
--- /dev/null
+++ b/include/grub/tpm2/tpm2.h
@@ -0,0 +1,34 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2022 Microsoft Corporation
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GRUB_TPM2_TPM2_HEADER
+#define GRUB_TPM2_TPM2_HEADER 1
+
+#include <grub/tpm2/internal/types.h>
+#include <grub/tpm2/internal/structs.h>
+#include <grub/tpm2/internal/functions.h>
+
+/* Well-Known Windows SRK handle */
+#define TPM2_SRK_HANDLE 0x81000001
+
+typedef struct TPM2_SEALED_KEY {
+  TPM2B_PUBLIC  public;
+  TPM2B_PRIVATE private;
+} TPM2_SEALED_KEY;
+
+#endif /* ! GRUB_TPM2_TPM2_HEADER */
-- 
2.35.3