Merge pull request #20 from mjg59/master

Add TPM measurement support

grub-core/Makefile.am

@@ -88,6 +88,7 @@ KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/term.h
 KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/time.h
 KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/mm_private.h
 KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/net.h
+KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/tpm.h
 KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/memory.h
 
 if COND_i386_pc

grub-core/Makefile.core.def

@@ -126,6 +126,7 @@ kernel = {
   common = kern/rescue_parser.c;
   common = kern/rescue_reader.c;
   common = kern/term.c;
+  common = kern/tpm.c;
 
   noemu = kern/compiler-rt.c;
   noemu = kern/mm.c;
@@ -173,6 +174,7 @@ kernel = {
   efi = term/efi/console.c;
   efi = kern/acpi.c;
   efi = kern/efi/acpi.c;
+  efi = kern/efi/tpm.c;
   i386_coreboot = kern/i386/pc/acpi.c;
   i386_multiboot = kern/i386/pc/acpi.c;
   i386_coreboot = kern/acpi.c;
@@ -217,6 +219,7 @@ kernel = {
 
   i386_pc = kern/i386/pc/init.c;
   i386_pc = kern/i386/pc/mmap.c;
+  i386_pc = kern/i386/pc/tpm.c;
   i386_pc = term/i386/pc/console.c;
 
   i386_qemu = bus/pci.c;

grub-core/boot/i386/pc/boot.S

@@ -24,11 +24,14 @@
  *  defines for the code go here
  */
 
+#define TPM 1
+
 	/* Print message string */
 #define MSG(x)	movw $x, %si; call LOCAL(message)
 #define ERR(x)	movw $x, %si; jmp LOCAL(error_message)
 
 	.macro floppy
+#ifndef TPM
 part_start:
 
 LOCAL(probe_values):
@@ -85,6 +88,7 @@ fd_probe_error_string:	.asciz "Floppy"
 	movb	MACRO_DOLLAR(79), %ch
 
 	jmp	LOCAL(final_init)
+#endif
 	.endm
 
 	.macro scratch
@@ -255,6 +259,7 @@ real_start:
 	/* set %si to the disk address packet */
 	movw	$disk_address_packet, %si
 
+#ifndef TPM
 	/* check if LBA is supported */
 	movb	$0x41, %ah
 	movw	$0x55aa, %bx
@@ -274,6 +279,7 @@ real_start:
 
 	andw	$1, %cx
 	jz	LOCAL(chs_mode)
+#endif
 
 LOCAL(lba_mode):
 	xorw	%ax, %ax
@@ -317,6 +323,9 @@ LOCAL(lba_mode):
 	jmp	LOCAL(copy_buffer)
 
 LOCAL(chs_mode):
+#ifdef TPM
+	jmp	LOCAL(general_error)
+#else
 	/*
 	 *  Determine the hard disk geometry from the BIOS!
 	 *  We do this first, so that LS-120 IDE floppies work correctly.
@@ -428,7 +437,7 @@ setup_sectors:
 	jc	LOCAL(read_error)
 
 	movw	%es, %bx
-
+#endif /* TPM */
 LOCAL(copy_buffer):
 	/*
 	 * We need to save %cx and %si because the startup code in
@@ -451,6 +460,25 @@ LOCAL(copy_buffer):
 	popw	%ds
 	popa
 
+#ifdef TPM
+	pusha
+
+	movw	$0xBB00, %ax		/* TCG_StatusCheck */
+	int	$0x1A
+	test	%eax, %eax
+	jnz	boot			/* No TPM or TPM deactivated */
+
+	movw	$0xBB07, %ax		/* TCG_CompactHashLogExtendEvent */
+	movw	$GRUB_BOOT_MACHINE_KERNEL_ADDR, %di
+	xorl	%esi, %esi
+	movl	$0x41504354, %ebx	/* TCPA */
+	movl	$0x200, %ecx		/* Measure 512 bytes */
+	movl	$0x8, %edx		/* PCR 8 */
+	int	$0x1A
+
+	popa
+#endif
+boot:
 	/* boot kernel */
 	jmp	*(LOCAL(kernel_address))
 

grub-core/boot/i386/pc/diskboot.S

@@ -19,6 +19,8 @@
 #include <grub/symbol.h>
 #include <grub/machine/boot.h>
 
+#define TPM 1
+
 /*
  *  defines for the code go here
  */
@@ -58,6 +60,21 @@ _start:
 	/* this sets up for the first run through "bootloop" */
 	movw	$LOCAL(firstlist), %di
 
+#ifdef TPM
+        /* clear EAX to remove potential garbage */
+	xorl    %eax, %eax
+	/* 8(%di) = number of sectors to read */
+	movw    8(%di), %ax
+
+	/* Multiply number of sectors to read with 512 bytes. EAX is 32bit
+	* which is large enough to hold values of up to 4GB. I doubt there
+	* will ever be a core.img larger than that. ;-) */
+	shll    $9, %eax
+
+	/* write result to bytes_to_measure var */
+	movl    %eax, bytes_to_measure
+#endif
+
 	/* save the sector number of the second sector in %ebp */
 	movl	(%di), %ebp
 
@@ -295,6 +312,29 @@ LOCAL(copy_buffer):
 /* END OF MAIN LOOP */
 
 LOCAL(bootit):
+#ifdef TPM
+	pusha
+	movw	$0xBB07, %ax		/* TCG_CompactHashLogExtendEvent */
+
+	movw	$0x0, %bx
+	movw	%bx, %es
+
+	/* We've already measured the first 512 bytes, now measure the rest */
+	xorl	%edi, %edi
+	movw	$(GRUB_BOOT_MACHINE_KERNEL_ADDR + 0x200), %di
+
+	movl	$0x41504354, %ebx	/* EBX = "TCPA" */
+
+	/* %ecx = The length, in bytes, of the buffer to measure  */
+	movl	$bytes_to_measure, %esi
+	movl	(%esi), %ecx
+	xorl	%esi, %esi
+	movl	$0x9, %edx		/* PCR 9 */
+
+	int	$0x1A
+
+	popa
+#endif
 	/* print a newline */
 	MSG(notification_done)
 	popw	%dx	/* this makes sure %dl is our "boot" drive */
@@ -329,6 +369,10 @@ geometry_error_string:	.asciz "Geom"
 read_error_string:	.asciz "Read"
 general_error_string:	.asciz " Error"
 
+#ifdef TPM
+bytes_to_measure:	.long 0
+#endif
+
 /*
  * message: write the string pointed to by %si
  *

grub-core/kern/dl.c

@@ -32,6 +32,7 @@
 #include <grub/env.h>
 #include <grub/cache.h>
 #include <grub/i18n.h>
+#include <grub/tpm.h>
 
 /* Platforms where modules are in a readonly area of memory.  */
 #if defined(GRUB_MACHINE_QEMU)
@@ -723,6 +724,8 @@ grub_dl_load_file (const char *filename)
      opens of the same device.  */
   grub_file_close (file);
 
+  grub_tpm_measure(core, size, GRUB_TPM_PCR, filename);
+
   mod = grub_dl_load_core (core, size);
   grub_free (core);
   if (! mod)

grub-core/kern/efi/tpm.c

@@ -0,0 +1,282 @@
+#include <grub/err.h>
+#include <grub/i18n.h>
+#include <grub/efi/api.h>
+#include <grub/efi/efi.h>
+#include <grub/efi/tpm.h>
+#include <grub/mm.h>
+#include <grub/tpm.h>
+#include <grub/term.h>
+
+static grub_efi_guid_t tpm_guid = EFI_TPM_GUID;
+static grub_efi_guid_t tpm2_guid = EFI_TPM2_GUID;
+
+static grub_efi_boolean_t grub_tpm_present(grub_efi_tpm_protocol_t *tpm)
+{
+  grub_efi_status_t status;
+  TCG_EFI_BOOT_SERVICE_CAPABILITY caps;
+  grub_uint32_t flags;
+  grub_efi_physical_address_t eventlog, lastevent;
+
+  caps.Size = (grub_uint8_t)sizeof(caps);
+
+  status = efi_call_5(tpm->status_check, tpm, &caps, &flags, &eventlog,
+		      &lastevent);
+
+  if (status != GRUB_EFI_SUCCESS || caps.TPMDeactivatedFlag
+      || !caps.TPMPresentFlag)
+    return 0;
+
+  return 1;
+}
+
+static grub_efi_boolean_t grub_tpm2_present(grub_efi_tpm2_protocol_t *tpm)
+{
+  grub_efi_status_t status;
+  EFI_TCG2_BOOT_SERVICE_CAPABILITY caps;
+
+  caps.Size = (grub_uint8_t)sizeof(caps);
+
+  status = efi_call_2(tpm->get_capability, tpm, &caps);
+
+  if (status != GRUB_EFI_SUCCESS || !caps.TPMPresentFlag)
+    return 0;
+
+  return 1;
+}
+
+static grub_efi_boolean_t grub_tpm_handle_find(grub_efi_handle_t *tpm_handle,
+					       grub_efi_uint8_t *protocol_version)
+{
+  grub_efi_handle_t *handles;
+  grub_efi_uintn_t num_handles;
+
+  handles = grub_efi_locate_handle (GRUB_EFI_BY_PROTOCOL, &tpm_guid, NULL,
+				    &num_handles);
+  if (handles && num_handles > 0) {
+    *tpm_handle = handles[0];
+    *protocol_version = 1;
+    return 1;
+  }
+
+  handles = grub_efi_locate_handle (GRUB_EFI_BY_PROTOCOL, &tpm2_guid, NULL,
+				    &num_handles);
+  if (handles && num_handles > 0) {
+    *tpm_handle = handles[0];
+    *protocol_version = 2;
+    return 1;
+  }
+
+  return 0;
+}
+
+static grub_err_t
+grub_tpm1_execute(grub_efi_handle_t tpm_handle,
+		  PassThroughToTPM_InputParamBlock *inbuf,
+		  PassThroughToTPM_OutputParamBlock *outbuf)
+{
+  grub_efi_status_t status;
+  grub_efi_tpm_protocol_t *tpm;
+  grub_uint32_t inhdrsize = sizeof(*inbuf) - sizeof(inbuf->TPMOperandIn);
+  grub_uint32_t outhdrsize = sizeof(*outbuf) - sizeof(outbuf->TPMOperandOut);
+
+  tpm = grub_efi_open_protocol (tpm_handle, &tpm_guid,
+				GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);
+
+  if (!grub_tpm_present(tpm))
+    return 0;
+
+  /* UEFI TPM protocol takes the raw operand block, no param block header */
+  status = efi_call_5 (tpm->pass_through_to_tpm, tpm,
+		       inbuf->IPBLength - inhdrsize, inbuf->TPMOperandIn,
+		       outbuf->OPBLength - outhdrsize, outbuf->TPMOperandOut);
+
+  switch (status) {
+  case GRUB_EFI_SUCCESS:
+    return 0;
+  case GRUB_EFI_DEVICE_ERROR:
+    return grub_error (GRUB_ERR_IO, N_("Command failed"));
+  case GRUB_EFI_INVALID_PARAMETER:
+    return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("Invalid parameter"));
+  case GRUB_EFI_BUFFER_TOO_SMALL:
+    return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("Output buffer too small"));
+  case GRUB_EFI_NOT_FOUND:
+    return grub_error (GRUB_ERR_UNKNOWN_DEVICE, N_("TPM unavailable"));
+  default:
+    return grub_error (GRUB_ERR_UNKNOWN_DEVICE, N_("Unknown TPM error"));
+  }
+}
+
+static grub_err_t
+grub_tpm2_execute(grub_efi_handle_t tpm_handle,
+		  PassThroughToTPM_InputParamBlock *inbuf,
+		  PassThroughToTPM_OutputParamBlock *outbuf)
+{
+  grub_efi_status_t status;
+  grub_efi_tpm2_protocol_t *tpm;
+  grub_uint32_t inhdrsize = sizeof(*inbuf) - sizeof(inbuf->TPMOperandIn);
+  grub_uint32_t outhdrsize = sizeof(*outbuf) - sizeof(outbuf->TPMOperandOut);
+
+  tpm = grub_efi_open_protocol (tpm_handle, &tpm2_guid,
+				GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);
+
+  if (!grub_tpm2_present(tpm))
+    return 0;
+
+  /* UEFI TPM protocol takes the raw operand block, no param block header */
+  status = efi_call_5 (tpm->submit_command, tpm,
+		       inbuf->IPBLength - inhdrsize, inbuf->TPMOperandIn,
+		       outbuf->OPBLength - outhdrsize, outbuf->TPMOperandOut);
+
+  switch (status) {
+  case GRUB_EFI_SUCCESS:
+    return 0;
+  case GRUB_EFI_DEVICE_ERROR:
+    return grub_error (GRUB_ERR_IO, N_("Command failed"));
+  case GRUB_EFI_INVALID_PARAMETER:
+    return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("Invalid parameter"));
+  case GRUB_EFI_BUFFER_TOO_SMALL:
+    return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("Output buffer too small"));
+  case GRUB_EFI_NOT_FOUND:
+    return grub_error (GRUB_ERR_UNKNOWN_DEVICE, N_("TPM unavailable"));
+  default:
+    return grub_error (GRUB_ERR_UNKNOWN_DEVICE, N_("Unknown TPM error"));
+  }
+}
+
+grub_err_t
+grub_tpm_execute(PassThroughToTPM_InputParamBlock *inbuf,
+		 PassThroughToTPM_OutputParamBlock *outbuf)
+{
+  grub_efi_handle_t tpm_handle;
+   grub_uint8_t protocol_version;
+
+  /* It's not a hard failure for there to be no TPM */
+  if (!grub_tpm_handle_find(&tpm_handle, &protocol_version))
+    return 0;
+
+  if (protocol_version == 1) {
+    return grub_tpm1_execute(tpm_handle, inbuf, outbuf);
+  } else {
+    return grub_tpm2_execute(tpm_handle, inbuf, outbuf);
+  }
+}
+
+typedef struct {
+	grub_uint32_t pcrindex;
+	grub_uint32_t eventtype;
+	grub_uint8_t digest[20];
+	grub_uint32_t eventsize;
+	grub_uint8_t event[1];
+} Event;
+
+
+static grub_err_t
+grub_tpm1_log_event(grub_efi_handle_t tpm_handle, unsigned char *buf,
+		    grub_size_t size, grub_uint8_t pcr,
+		    const char *description)
+{
+  Event *event;
+  grub_efi_status_t status;
+  grub_efi_tpm_protocol_t *tpm;
+  grub_efi_physical_address_t lastevent;
+  grub_uint32_t algorithm;
+  grub_uint32_t eventnum = 0;
+
+  tpm = grub_efi_open_protocol (tpm_handle, &tpm_guid,
+				GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);
+
+  if (!grub_tpm_present(tpm))
+    return 0;
+
+  event = grub_zalloc(sizeof (Event) + grub_strlen(description) + 1);
+  if (!event)
+    return grub_error (GRUB_ERR_OUT_OF_MEMORY,
+		       N_("cannot allocate TPM event buffer"));
+
+  event->pcrindex = pcr;
+  event->eventtype = EV_IPL;
+  event->eventsize = grub_strlen(description) + 1;
+  grub_memcpy(event->event, description, event->eventsize);
+
+  algorithm = TCG_ALG_SHA;
+  status = efi_call_7 (tpm->log_extend_event, tpm, buf, (grub_uint64_t) size,
+		       algorithm, event, &eventnum, &lastevent);
+
+  switch (status) {
+  case GRUB_EFI_SUCCESS:
+    return 0;
+  case GRUB_EFI_DEVICE_ERROR:
+    return grub_error (GRUB_ERR_IO, N_("Command failed"));
+  case GRUB_EFI_INVALID_PARAMETER:
+    return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("Invalid parameter"));
+  case GRUB_EFI_BUFFER_TOO_SMALL:
+    return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("Output buffer too small"));
+  case GRUB_EFI_NOT_FOUND:
+    return grub_error (GRUB_ERR_UNKNOWN_DEVICE, N_("TPM unavailable"));
+  default:
+    return grub_error (GRUB_ERR_UNKNOWN_DEVICE, N_("Unknown TPM error"));
+  }
+}
+
+static grub_err_t
+grub_tpm2_log_event(grub_efi_handle_t tpm_handle, unsigned char *buf,
+		   grub_size_t size, grub_uint8_t pcr,
+		   const char *description)
+{
+  EFI_TCG2_EVENT *event;
+  grub_efi_status_t status;
+  grub_efi_tpm2_protocol_t *tpm;
+
+  tpm = grub_efi_open_protocol (tpm_handle, &tpm2_guid,
+				GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);
+
+  if (!grub_tpm2_present(tpm))
+    return 0;
+
+  event = grub_zalloc(sizeof (EFI_TCG2_EVENT) + grub_strlen(description) + 1);
+  if (!event)
+    return grub_error (GRUB_ERR_OUT_OF_MEMORY,
+		       N_("cannot allocate TPM event buffer"));
+
+  event->Header.HeaderSize = sizeof(EFI_TCG2_EVENT_HEADER);
+  event->Header.HeaderVersion = 1;
+  event->Header.PCRIndex = pcr;
+  event->Header.EventType = EV_IPL;
+  event->Size = sizeof(*event) - sizeof(event->Event) + grub_strlen(description) + 1;
+  grub_memcpy(event->Event, description, grub_strlen(description) + 1);
+
+  status = efi_call_5 (tpm->hash_log_extend_event, tpm, 0, buf,
+		       (grub_uint64_t) size, event);
+
+  switch (status) {
+  case GRUB_EFI_SUCCESS:
+    return 0;
+  case GRUB_EFI_DEVICE_ERROR:
+    return grub_error (GRUB_ERR_IO, N_("Command failed"));
+  case GRUB_EFI_INVALID_PARAMETER:
+    return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("Invalid parameter"));
+  case GRUB_EFI_BUFFER_TOO_SMALL:
+    return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("Output buffer too small"));
+  case GRUB_EFI_NOT_FOUND:
+    return grub_error (GRUB_ERR_UNKNOWN_DEVICE, N_("TPM unavailable"));
+  default:
+    return grub_error (GRUB_ERR_UNKNOWN_DEVICE, N_("Unknown TPM error"));
+  }
+}
+
+grub_err_t
+grub_tpm_log_event(unsigned char *buf, grub_size_t size, grub_uint8_t pcr,
+		   const char *description)
+{
+  grub_efi_handle_t tpm_handle;
+  grub_efi_uint8_t protocol_version;
+
+  if (!grub_tpm_handle_find(&tpm_handle, &protocol_version))
+    return 0;
+
+  if (protocol_version == 1) {
+    return grub_tpm1_log_event(tpm_handle, buf, size, pcr, description);
+  } else {
+    return grub_tpm2_log_event(tpm_handle, buf, size, pcr, description);
+  }
+}

grub-core/kern/i386/pc/tpm.c

@@ -0,0 +1,132 @@
+#include <grub/err.h>
+#include <grub/i18n.h>
+#include <grub/mm.h>
+#include <grub/tpm.h>
+#include <grub/misc.h>
+#include <grub/i386/pc/int.h>
+
+#define TCPA_MAGIC 0x41504354
+
+int tpm_present(void);
+
+int tpm_present(void)
+{
+  struct grub_bios_int_registers regs;
+
+  regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
+  regs.eax = 0xbb00;
+  regs.ebx = TCPA_MAGIC;
+  grub_bios_interrupt (0x1a, &regs);
+
+  if (regs.eax == 0)
+    return 1;
+
+  return 0;
+}
+
+grub_err_t
+grub_tpm_execute(PassThroughToTPM_InputParamBlock *inbuf,
+		 PassThroughToTPM_OutputParamBlock *outbuf)
+{
+  struct grub_bios_int_registers regs;
+  grub_addr_t inaddr, outaddr;
+
+  if (!tpm_present())
+    return 0;
+
+  inaddr = (grub_addr_t) inbuf;
+  outaddr = (grub_addr_t) outbuf;
+  regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
+  regs.eax = 0xbb02;
+  regs.ebx = TCPA_MAGIC;
+  regs.ecx = 0;
+  regs.edx = 0;
+  regs.es = (inaddr & 0xffff0000) >> 4;
+  regs.edi = inaddr & 0xffff;
+  regs.ds = outaddr >> 4;
+  regs.esi = outaddr & 0xf;
+
+  grub_bios_interrupt (0x1a, &regs);
+
+  if (regs.eax)
+    return grub_error (GRUB_ERR_IO, N_("TPM error %x\n"), regs.eax);
+
+  return 0;
+}
+
+typedef struct {
+	grub_uint32_t pcrindex;
+	grub_uint32_t eventtype;
+	grub_uint8_t digest[20];
+	grub_uint32_t eventdatasize;
+	grub_uint8_t event[0];
+} GRUB_PACKED Event;
+
+typedef struct {
+	grub_uint16_t ipblength;
+	grub_uint16_t reserved;
+	grub_uint32_t hashdataptr;
+	grub_uint32_t hashdatalen;
+	grub_uint32_t pcr;
+	grub_uint32_t reserved2;
+	grub_uint32_t logdataptr;
+	grub_uint32_t logdatalen;
+} GRUB_PACKED EventIncoming;
+
+typedef struct {
+	grub_uint16_t opblength;
+	grub_uint16_t reserved;
+	grub_uint32_t eventnum;
+	grub_uint8_t  hashvalue[20];
+} GRUB_PACKED EventOutgoing;
+
+grub_err_t
+grub_tpm_log_event(unsigned char *buf, grub_size_t size, grub_uint8_t pcr,
+		   const char *description)
+{
+	struct grub_bios_int_registers regs;
+	EventIncoming incoming;
+	EventOutgoing outgoing;
+	Event *event;
+	grub_uint32_t datalength;
+
+	if (!tpm_present())
+		return 0;
+
+	datalength = grub_strlen(description);
+	event = grub_zalloc(datalength + sizeof(Event));
+	if (!event)
+		return grub_error (GRUB_ERR_OUT_OF_MEMORY,
+				   N_("cannot allocate TPM event buffer"));
+
+	event->pcrindex = pcr;
+	event->eventtype = 0x0d;
+	event->eventdatasize = grub_strlen(description);
+	grub_memcpy(event->event, description, datalength);
+
+	incoming.ipblength = sizeof(incoming);
+	incoming.hashdataptr = (grub_uint32_t)buf;
+	incoming.hashdatalen = size;
+	incoming.pcr = pcr;
+	incoming.logdataptr = (grub_uint32_t)event;
+	incoming.logdatalen = datalength + sizeof(Event);
+
+	regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
+	regs.eax = 0xbb01;
+	regs.ebx = TCPA_MAGIC;
+	regs.ecx = 0;
+	regs.edx = 0;
+	regs.es = (((grub_addr_t) &incoming) & 0xffff0000) >> 4;
+	regs.edi = ((grub_addr_t) &incoming) & 0xffff;
+	regs.ds = (((grub_addr_t) &outgoing) & 0xffff0000) >> 4;
+	regs.esi = ((grub_addr_t) &outgoing) & 0xffff;
+
+	grub_bios_interrupt (0x1a, &regs);
+
+	grub_free(event);
+
+	if (regs.eax)
+		return grub_error (GRUB_ERR_IO, N_("TPM error %x\n"), regs.eax);
+
+	return 0;
+}

grub-core/kern/tpm.c

@@ -0,0 +1,13 @@
+#include <grub/err.h>
+#include <grub/i18n.h>
+#include <grub/misc.h>
+#include <grub/mm.h>
+#include <grub/tpm.h>
+#include <grub/term.h>
+
+grub_err_t
+grub_tpm_measure (unsigned char *buf, grub_size_t size, grub_uint8_t pcr,
+		  const char *description)
+{
+  return grub_tpm_log_event(buf, size, pcr, description);
+}

grub-core/lib/cmdline.c

@@ -19,6 +19,7 @@
 
 #include <grub/lib/cmdline.h>
 #include <grub/misc.h>
+#include <grub/tpm.h>
 
 static unsigned int check_arg (char *c, int *has_space)
 {
@@ -67,7 +68,7 @@ int grub_create_loader_cmdline (int argc, char *argv[], char *buf,
 {
   int i, space;
   unsigned int arg_size;
-  char *c;
+  char *c, *orig = buf;
 
   for (i = 0; i < argc; i++)
     {
@@ -104,5 +105,8 @@ int grub_create_loader_cmdline (int argc, char *argv[], char *buf,
 
   *buf = 0;
 
+  grub_tpm_measure ((void *)orig, grub_strlen (orig), GRUB_CMDLINE_PCR,
+		    "Kernel Commandline");
+
   return i;
 }

grub-core/loader/i386/efi/linux.c

@@ -26,6 +26,7 @@
 #include <grub/i18n.h>
 #include <grub/lib/cmdline.h>
 #include <grub/efi/efi.h>
+#include <grub/tpm.h>
 
 #include "../verity-hash.h"
 
@@ -168,6 +169,7 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
                         argv[i]);
           goto fail;
         }
+      grub_tpm_measure (ptr, cursize, GRUB_INITRD_PCR, "UEFI Linux initrd");
       ptr += cursize;
       grub_memset (ptr, 0, ALIGN_UP_OVERHEAD (cursize, 4));
       ptr += ALIGN_UP_OVERHEAD (cursize, 4);
@@ -193,7 +195,7 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
   grub_file_t file = 0;
   struct linux_kernel_header lh;
   grub_ssize_t len, start, filelen;
-  void *kernel;
+  void *kernel = NULL;
 
   grub_dl_ref (my_mod);
 
@@ -223,6 +225,8 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
       goto fail;
     }
 
+  grub_tpm_measure (kernel, filelen, GRUB_KERNEL_PCR, "UEFI Linux kernel");
+
   if (! grub_linuxefi_secure_validate (kernel, filelen))
     {
       grub_error (GRUB_ERR_INVALID_COMMAND, N_("%s has invalid signature"), argv[0]);
@@ -230,10 +234,6 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
       goto fail;
     }
 
-  grub_file_seek (file, 0);
-
-  grub_free(kernel);
-
   params = grub_efi_allocate_pages_max (0x3fffffff, BYTES_TO_PAGES(16384));
 
   if (! params)
@@ -242,15 +242,9 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
       goto fail;
     }
 
-  memset (params, 0, 16384);
+  grub_memset (params, 0, 16384);
 
-  if (grub_file_read (file, &lh, sizeof (lh)) != sizeof (lh))
+  grub_memcpy (&lh, kernel, sizeof (lh));
-    {
-      if (!grub_errno)
-	grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
-		    argv[0]);
-      goto fail;
-    }
 
   if (lh.boot_flag != grub_cpu_to_le16 (0xaa55))
     {
@@ -311,27 +305,12 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
       goto fail;
     }
 
-  if (grub_file_seek (file, start) == (grub_off_t) -1)
+  grub_memcpy (kernel_mem, (char *)kernel + start, len);
-    {
+  grub_loader_set (grub_linuxefi_boot, grub_linuxefi_unload, 0);
-      grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
+  loaded=1;
-		  argv[0]);
-      goto fail;
-    }
 
-  if (grub_file_read (file, kernel_mem, len) != len && !grub_errno)
+  lh.code32_start = (grub_uint32_t)(grub_uint64_t) kernel_mem;
-    {
+  grub_memcpy (params, &lh, 2 * 512);
-      grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
-		  argv[0]);
-    }
-
-  if (grub_errno == GRUB_ERR_NONE)
-    {
-      grub_loader_set (grub_linuxefi_boot, grub_linuxefi_unload, 0);
-      loaded = 1;
-      lh.code32_start = (grub_uint32_t)(grub_uint64_t) kernel_mem;
-    }
-
-  memcpy(params, &lh, 2 * 512);
 
   params->type_of_loader = 0x21;
 
@@ -340,6 +319,8 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
   if (file)
     grub_file_close (file);
 
+  grub_free (kernel);
+
   if (grub_errno != GRUB_ERR_NONE)
     {
       grub_dl_unref (my_mod);

grub-core/loader/i386/linux.c

@@ -35,6 +35,7 @@
 #include <grub/i18n.h>
 #include <grub/lib/cmdline.h>
 #include <grub/linux.h>
+#include <grub/tpm.h>
 
 #include "verity-hash.h"
 GRUB_MOD_LICENSE ("GPLv3+");
@@ -681,12 +682,13 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
   grub_file_t file = 0;
   struct linux_kernel_header lh;
   grub_uint8_t setup_sects;
-  grub_size_t real_size, prot_size, prot_file_size;
+  grub_size_t real_size, prot_size, prot_file_size, kernel_offset;
   grub_ssize_t len;
   int i;
   grub_size_t align, min_align;
   int relocatable;
   grub_uint64_t preferred_address = GRUB_LINUX_BZIMAGE_ADDR;
+  grub_uint8_t *kernel = NULL;
 
   grub_dl_ref (my_mod);
 
@@ -700,7 +702,15 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
   if (! file)
     goto fail;
 
-  if (grub_file_read (file, &lh, sizeof (lh)) != sizeof (lh))
+  len = grub_file_size (file);
+  kernel = grub_malloc (len);
+  if (!kernel)
+    {
+      grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("cannot allocate kernel buffer"));
+      goto fail;
+    }
+
+  if (grub_file_read (file, kernel, len) != len)
     {
       if (!grub_errno)
 	grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
@@ -708,6 +718,12 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
       goto fail;
     }
 
+  grub_tpm_measure (kernel, len, GRUB_KERNEL_PCR, "Linux Kernel");
+
+  grub_memcpy (&lh, kernel, sizeof (lh));
+
+  kernel_offset = sizeof (lh);
+
   if (lh.boot_flag != grub_cpu_to_le16_compile_time (0xaa55))
     {
       grub_error (GRUB_ERR_BAD_OS, "invalid magic number");
@@ -807,13 +823,9 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
   linux_params.ps_mouse = linux_params.padding10 =  0;
 
   len = sizeof (linux_params) - sizeof (lh);
-  if (grub_file_read (file, (char *) &linux_params + sizeof (lh), len) != len)
+
-    {
+  grub_memcpy (&linux_params + sizeof (lh), kernel + kernel_offset, len);
-      if (!grub_errno)
+  kernel_offset += len;
-	grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
-		    argv[0]);
-      goto fail;
-    }
 
   linux_params.type_of_loader = GRUB_LINUX_BOOT_LOADER_TYPE;
 
@@ -872,7 +884,7 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
 
   /* The other parameters are filled when booting.  */
 
-  grub_file_seek (file, real_size + GRUB_DISK_SECTOR_SIZE);
+  kernel_offset = real_size + GRUB_DISK_SECTOR_SIZE;
 
   grub_dprintf ("linux", "bzImage, setup=0x%x, size=0x%x\n",
 		(unsigned) real_size, (unsigned) prot_size);
@@ -1018,9 +1030,8 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
 
   grub_pass_verity_hash(&lh, linux_cmdline);
   len = prot_file_size;
-  if (grub_file_read (file, prot_mode_mem, len) != len && !grub_errno)
+  grub_memcpy (prot_mode_mem, kernel + kernel_offset, len);
-    grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
+  kernel_offset += len;
-		argv[0]);
 
   if (grub_errno == GRUB_ERR_NONE)
     {
@@ -1031,6 +1042,8 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
 
  fail:
 
+  grub_free (kernel);
+
   if (file)
     grub_file_close (file);
 

grub-core/loader/i386/multiboot_mbi.c

@@ -36,6 +36,7 @@
 #include <grub/net.h>
 #include <grub/i18n.h>
 #include <grub/lib/cmdline.h>
+#include <grub/tpm.h>
 
 #ifdef GRUB_MACHINE_EFI
 #include <grub/efi/efi.h>
@@ -164,6 +165,8 @@ grub_multiboot_load (grub_file_t file, const char *filename)
       return grub_errno;
     }
 
+  grub_tpm_measure((unsigned char*)buffer, len, GRUB_KERNEL_PCR, filename);
+
   header = find_header (buffer, len);
 
   if (header == 0)

grub-core/loader/i386/pc/linux.c

@@ -35,6 +35,7 @@
 #include <grub/i386/floppy.h>
 #include <grub/lib/cmdline.h>
 #include <grub/linux.h>
+#include <grub/tpm.h>
 
 GRUB_MOD_LICENSE ("GPLv3+");
 
@@ -123,13 +124,14 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
   grub_file_t file = 0;
   struct linux_kernel_header lh;
   grub_uint8_t setup_sects;
-  grub_size_t real_size;
+  grub_size_t real_size, kernel_offset = 0;
   grub_ssize_t len;
   int i;
   char *grub_linux_prot_chunk;
   int grub_linux_is_bzimage;
   grub_addr_t grub_linux_prot_target;
   grub_err_t err;
+  grub_uint8_t *kernel = NULL;
 
   grub_dl_ref (my_mod);
 
@@ -143,7 +145,15 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
   if (! file)
     goto fail;
 
-  if (grub_file_read (file, &lh, sizeof (lh)) != sizeof (lh))
+  len = grub_file_size (file);
+  kernel = grub_malloc (len);
+  if (!kernel)
+    {
+      grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("cannot allocate kernel buffer"));
+      goto fail;
+    }
+
+  if (grub_file_read (file, kernel, len) != len)
     {
       if (!grub_errno)
 	grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
@@ -151,6 +161,11 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
       goto fail;
     }
 
+  grub_tpm_measure (kernel, len, GRUB_KERNEL_PCR, "BIOS Linux Kernel");
+
+  grub_memcpy (&lh, kernel, sizeof (lh));
+  kernel_offset = sizeof (lh);
+
   if (lh.boot_flag != grub_cpu_to_le16_compile_time (0xaa55))
     {
       grub_error (GRUB_ERR_BAD_OS, "invalid magic number");
@@ -314,13 +329,9 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
   grub_memmove (grub_linux_real_chunk, &lh, sizeof (lh));
 
   len = real_size + GRUB_DISK_SECTOR_SIZE - sizeof (lh);
-  if (grub_file_read (file, grub_linux_real_chunk + sizeof (lh), len) != len)
+  grub_memcpy (grub_linux_real_chunk + sizeof (lh), kernel + kernel_offset,
-    {
+	       len);
-      if (!grub_errno)
+  kernel_offset += len;
-	grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
-		    argv[0]);
-      goto fail;
-    }
 
   if (lh.header != grub_cpu_to_le32_compile_time (GRUB_LINUX_MAGIC_SIGNATURE)
       || grub_le_to_cpu16 (lh.version) < 0x0200)
@@ -355,10 +366,8 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
   }
 
   len = grub_linux16_prot_size;
-  if (grub_file_read (file, grub_linux_prot_chunk, grub_linux16_prot_size)
+  grub_memcpy (grub_linux_prot_chunk, kernel + kernel_offset, len);
-      != (grub_ssize_t) grub_linux16_prot_size && !grub_errno)
+  kernel_offset += len;
-    grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
-		argv[0]);
 
   if (grub_errno == GRUB_ERR_NONE)
     {
@@ -368,6 +377,8 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
 
  fail:
 
+  grub_free (kernel);
+
   if (file)
     grub_file_close (file);
 

grub-core/loader/linux.c

@@ -4,6 +4,7 @@
 #include <grub/misc.h>
 #include <grub/file.h>
 #include <grub/mm.h>
+#include <grub/tpm.h>
 
 struct newc_head
 {
@@ -288,6 +289,7 @@ grub_initrd_load (struct grub_linux_initrd_context *initrd_ctx,
 	  grub_initrd_close (initrd_ctx);
 	  return grub_errno;
 	}
+      grub_tpm_measure (ptr, cursize, GRUB_INITRD_PCR, "Linux Initrd");
       ptr += cursize;
     }
   if (newc)

grub-core/loader/multiboot.c

@@ -42,6 +42,7 @@
 #include <grub/video.h>
 #include <grub/memory.h>
 #include <grub/i18n.h>
+#include <grub/tpm.h>
 
 GRUB_MOD_LICENSE ("GPLv3+");
 
@@ -384,6 +385,7 @@ grub_cmd_module (grub_command_t cmd __attribute__ ((unused)),
     }
 
   grub_file_close (file);
+  grub_tpm_measure (module, size, GRUB_KERNEL_PCR, argv[0]);
   return GRUB_ERR_NONE;
 }
 

grub-core/loader/multiboot_mbi2.c

@@ -36,6 +36,7 @@
 #include <grub/i18n.h>
 #include <grub/net.h>
 #include <grub/lib/cmdline.h>
+#include <grub/tpm.h>
 
 #if defined (GRUB_MACHINE_EFI)
 #include <grub/efi/efi.h>
@@ -126,6 +127,8 @@ grub_multiboot_load (grub_file_t file, const char *filename)
 
   COMPILE_TIME_ASSERT (MULTIBOOT_HEADER_ALIGN % 4 == 0);
 
+  grub_tpm_measure ((unsigned char *)buffer, len, GRUB_KERNEL_PCR, filename);
+
   header = find_header (buffer, len);
 
   if (header == 0)

grub-core/script/execute.c

@@ -27,6 +27,7 @@
 #include <grub/normal.h>
 #include <grub/extcmd.h>
 #include <grub/i18n.h>
+#include <grub/tpm.h>
 
 /* Max digits for a char is 3 (0xFF is 255), similarly for an int it
    is sizeof (int) * 3, and one extra for a possible -ve sign.  */
@@ -933,8 +934,9 @@ grub_script_execute_cmdline (struct grub_script_cmd *cmd)
   grub_err_t ret = 0;
   grub_script_function_t func = 0;
   char errnobuf[18];
-  char *cmdname;
+  char *cmdname, *cmdstring;
-  int argc;
+  int argc, offset = 0, cmdlen = 0;
+  unsigned int i;
   char **args;
   int invert;
   struct grub_script_argv argv = { 0, 0, 0 };
@@ -943,6 +945,25 @@ grub_script_execute_cmdline (struct grub_script_cmd *cmd)
   if (grub_script_arglist_to_argv (cmdline->arglist, &argv) || ! argv.args[0])
     return grub_errno;
 
+  for (i = 0; i < argv.argc; i++) {
+	  cmdlen += grub_strlen (argv.args[i]) + 1;
+  }
+
+  cmdstring = grub_malloc (cmdlen);
+  if (!cmdstring)
+  {
+	  return grub_error (GRUB_ERR_OUT_OF_MEMORY,
+			     N_("cannot allocate command buffer"));
+  }
+
+  for (i = 0; i < argv.argc; i++) {
+	  offset += grub_snprintf (cmdstring + offset, cmdlen - offset, "%s ",
+				   argv.args[i]);
+  }
+  cmdstring[cmdlen-1]= '\0';
+  grub_tpm_measure ((unsigned char *)cmdstring, cmdlen, GRUB_COMMAND_PCR,
+		    cmdstring);
+  grub_free(cmdstring);
   invert = 0;
   argc = argv.argc - 1;
   args = argv.args + 1;

include/grub/efi/tpm.h

@@ -0,0 +1,153 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2015  Free Software Foundation, Inc.
+ *
+ *  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_EFI_TPM_HEADER
+#define GRUB_EFI_TPM_HEADER 1
+
+#define EFI_TPM_GUID {0xf541796d, 0xa62e, 0x4954, {0xa7, 0x75, 0x95, 0x84, 0xf6, 0x1b, 0x9c, 0xdd }};
+#define EFI_TPM2_GUID {0x607f766c, 0x7455, 0x42be, {0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f }};
+
+typedef struct {
+  grub_efi_uint8_t Major;
+  grub_efi_uint8_t Minor;
+  grub_efi_uint8_t RevMajor;
+  grub_efi_uint8_t RevMinor;
+} TCG_VERSION;
+
+typedef struct _TCG_EFI_BOOT_SERVICE_CAPABILITY {
+  grub_efi_uint8_t          Size;                /// Size of this structure.
+  TCG_VERSION    StructureVersion;
+  TCG_VERSION    ProtocolSpecVersion;
+  grub_efi_uint8_t          HashAlgorithmBitmap; /// Hash algorithms .
+  char        TPMPresentFlag;      /// 00h = TPM not present.
+  char        TPMDeactivatedFlag;  /// 01h = TPM currently deactivated.
+} TCG_EFI_BOOT_SERVICE_CAPABILITY;
+
+typedef struct {
+  grub_efi_uint32_t PCRIndex;
+  grub_efi_uint32_t EventType;
+  grub_efi_uint8_t digest[20];
+  grub_efi_uint32_t EventSize;
+  grub_efi_uint8_t  Event[1];
+} TCG_PCR_EVENT;
+
+struct grub_efi_tpm_protocol
+{
+  grub_efi_status_t (*status_check) (struct grub_efi_tpm_protocol *this,
+				     TCG_EFI_BOOT_SERVICE_CAPABILITY *ProtocolCapability,
+				     grub_efi_uint32_t *TCGFeatureFlags,
+				     grub_efi_physical_address_t *EventLogLocation,
+				     grub_efi_physical_address_t *EventLogLastEntry);
+  grub_efi_status_t (*hash_all) (struct grub_efi_tpm_protocol *this,
+				 grub_efi_uint8_t *HashData,
+				 grub_efi_uint64_t HashLen,
+				 grub_efi_uint32_t AlgorithmId,
+				 grub_efi_uint64_t *HashedDataLen,
+				 grub_efi_uint8_t **HashedDataResult);
+  grub_efi_status_t (*log_event) (struct grub_efi_tpm_protocol *this,
+				  TCG_PCR_EVENT *TCGLogData,
+				  grub_efi_uint32_t *EventNumber,
+				  grub_efi_uint32_t Flags);
+  grub_efi_status_t (*pass_through_to_tpm) (struct grub_efi_tpm_protocol *this,
+					    grub_efi_uint32_t TpmInputParameterBlockSize,
+					    grub_efi_uint8_t *TpmInputParameterBlock,
+					    grub_efi_uint32_t TpmOutputParameterBlockSize,
+					    grub_efi_uint8_t *TpmOutputParameterBlock);
+  grub_efi_status_t (*log_extend_event) (struct grub_efi_tpm_protocol *this,
+					 grub_efi_physical_address_t HashData,
+					 grub_efi_uint64_t HashDataLen,
+					 grub_efi_uint32_t AlgorithmId,
+					 TCG_PCR_EVENT *TCGLogData,
+					 grub_efi_uint32_t *EventNumber,
+					 grub_efi_physical_address_t *EventLogLastEntry);
+};
+
+typedef struct grub_efi_tpm_protocol grub_efi_tpm_protocol_t;
+
+typedef grub_efi_uint32_t EFI_TCG2_EVENT_LOG_BITMAP;
+typedef grub_efi_uint32_t EFI_TCG2_EVENT_LOG_FORMAT;
+typedef grub_efi_uint32_t EFI_TCG2_EVENT_ALGORITHM_BITMAP;
+
+typedef struct tdEFI_TCG2_VERSION {
+  grub_efi_uint8_t Major;
+  grub_efi_uint8_t Minor;
+} GRUB_PACKED EFI_TCG2_VERSION;
+
+typedef struct tdEFI_TCG2_BOOT_SERVICE_CAPABILITY {
+  grub_efi_uint8_t Size;
+  EFI_TCG2_VERSION StructureVersion;
+  EFI_TCG2_VERSION ProtocolVersion;
+  EFI_TCG2_EVENT_ALGORITHM_BITMAP HashAlgorithmBitmap;
+  EFI_TCG2_EVENT_LOG_BITMAP SupportedEventLogs;
+  grub_efi_boolean_t TPMPresentFlag;
+  grub_efi_uint16_t MaxCommandSize;
+  grub_efi_uint16_t MaxResponseSize;
+  grub_efi_uint32_t ManufacturerID;
+  grub_efi_uint32_t NumberOfPcrBanks;
+  EFI_TCG2_EVENT_ALGORITHM_BITMAP ActivePcrBanks;
+} EFI_TCG2_BOOT_SERVICE_CAPABILITY;
+
+typedef grub_efi_uint32_t TCG_PCRINDEX;
+typedef grub_efi_uint32_t TCG_EVENTTYPE;
+
+typedef struct tdEFI_TCG2_EVENT_HEADER {
+  grub_efi_uint32_t HeaderSize;
+  grub_efi_uint16_t HeaderVersion;
+  TCG_PCRINDEX PCRIndex;
+  TCG_EVENTTYPE EventType;
+} GRUB_PACKED EFI_TCG2_EVENT_HEADER;
+
+typedef struct tdEFI_TCG2_EVENT {
+  grub_efi_uint32_t Size;
+  EFI_TCG2_EVENT_HEADER Header;
+  grub_efi_uint8_t Event[1];
+} GRUB_PACKED EFI_TCG2_EVENT;
+
+struct grub_efi_tpm2_protocol
+{
+  grub_efi_status_t (*get_capability) (struct grub_efi_tpm2_protocol *this,
+				       EFI_TCG2_BOOT_SERVICE_CAPABILITY *ProtocolCapability);
+  grub_efi_status_t (*get_event_log) (struct grub_efi_tpm2_protocol *this,
+				      EFI_TCG2_EVENT_LOG_FORMAT EventLogFormat,
+				      grub_efi_physical_address_t *EventLogLocation,
+				      grub_efi_physical_address_t *EventLogLastEntry,
+				      grub_efi_boolean_t *EventLogTruncated);
+  grub_efi_status_t (*hash_log_extend_event) (struct grub_efi_tpm2_protocol *this,
+					      grub_efi_uint64_t Flags,
+					      grub_efi_physical_address_t *DataToHash,
+					      grub_efi_uint64_t DataToHashLen,
+					      EFI_TCG2_EVENT *EfiTcgEvent);
+  grub_efi_status_t (*submit_command) (struct grub_efi_tpm2_protocol *this,
+				       grub_efi_uint32_t InputParameterBlockSize,
+				       grub_efi_uint8_t *InputParameterBlock,
+				       grub_efi_uint32_t OutputParameterBlockSize,
+				       grub_efi_uint8_t *OutputParameterBlock);
+  grub_efi_status_t (*get_active_pcr_blanks) (struct grub_efi_tpm2_protocol *this,
+					      grub_efi_uint32_t *ActivePcrBanks);
+  grub_efi_status_t (*set_active_pcr_banks) (struct grub_efi_tpm2_protocol *this,
+					     grub_efi_uint32_t ActivePcrBanks);
+  grub_efi_status_t (*get_result_of_set_active_pcr_banks) (struct grub_efi_tpm2_protocol *this,
+							   grub_efi_uint32_t *OperationPresent,
+							   grub_efi_uint32_t *Response);
+};
+
+typedef struct grub_efi_tpm2_protocol grub_efi_tpm2_protocol_t;
+
+#define TCG_ALG_SHA 0x00000004
+
+#endif

include/grub/tpm.h

@@ -0,0 +1,92 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2015  Free Software Foundation, Inc.
+ *
+ *  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_TPM_HEADER
+#define GRUB_TPM_HEADER 1
+
+#define SHA1_DIGEST_SIZE 20
+
+#define TPM_BASE 0x0
+#define TPM_SUCCESS TPM_BASE
+#define TPM_AUTHFAIL (TPM_BASE + 0x1)
+#define TPM_BADINDEX (TPM_BASE + 0x2)
+
+#define GRUB_TPM_PCR 9
+#define GRUB_KERNEL_PCR 10
+#define GRUB_INITRD_PCR 11
+#define GRUB_CMDLINE_PCR 12
+#define GRUB_COMMAND_PCR 13
+
+#define TPM_TAG_RQU_COMMAND 0x00C1
+#define TPM_ORD_Extend 0x14
+
+#define EV_IPL 0x0d
+
+/* TCG_PassThroughToTPM Input Parameter Block */
+typedef struct {
+        grub_uint16_t IPBLength;
+        grub_uint16_t Reserved1;
+        grub_uint16_t OPBLength;
+        grub_uint16_t Reserved2;
+        grub_uint8_t TPMOperandIn[1];
+} GRUB_PACKED PassThroughToTPM_InputParamBlock;
+
+/* TCG_PassThroughToTPM Output Parameter Block */
+typedef struct {
+        grub_uint16_t OPBLength;
+        grub_uint16_t Reserved;
+        grub_uint8_t TPMOperandOut[1];
+} GRUB_PACKED PassThroughToTPM_OutputParamBlock;
+
+typedef struct {
+        grub_uint16_t tag;
+        grub_uint32_t paramSize;
+        grub_uint32_t ordinal;
+        grub_uint32_t pcrNum;
+        grub_uint8_t inDigest[SHA1_DIGEST_SIZE];                /* The 160 bit value representing the event to be recorded. */
+} GRUB_PACKED ExtendIncoming;
+
+/* TPM_Extend Outgoing Operand */
+typedef struct {
+        grub_uint16_t tag;
+        grub_uint32_t paramSize;
+        grub_uint32_t returnCode;
+        grub_uint8_t outDigest[SHA1_DIGEST_SIZE];               /* The PCR value after execution of the command. */
+} GRUB_PACKED ExtendOutgoing;
+
+grub_err_t EXPORT_FUNC(grub_tpm_measure) (unsigned char *buf, grub_size_t size,
+					  grub_uint8_t pcr,
+					  const char *description);
+#if defined (GRUB_MACHINE_EFI) || defined (GRUB_MACHINE_PCBIOS)
+grub_err_t grub_tpm_execute(PassThroughToTPM_InputParamBlock *inbuf,
+			    PassThroughToTPM_OutputParamBlock *outbuf);
+grub_err_t grub_tpm_log_event(unsigned char *buf, grub_size_t size,
+			      grub_uint8_t pcr, const char *description);
+#else
+static inline grub_err_t grub_tpm_execute(PassThroughToTPM_InputParamBlock *inbuf,
+					  PassThroughToTPM_OutputParamBlock *outbuf) { return 0; };
+static inline grub_err_t grub_tpm_log_event(unsigned char *buf,
+					    grub_size_t size,
+					    grub_uint8_t pcr,
+					    const char *description)
+{
+	return 0;
+};
+#endif
+
+#endif