Add tpm_lite library
Ported from coreboot:
https://chromium.googlesource.com/chromiumos/third_party/coreboot/+/chromeos-2013.04/src/lib
d5ab28b5d73c03adcdc0fd4e530b39a7a8989dae
Change-Id: Ie3652d513db3c2ab1a28acfc790d32eea3188ed3
diff --git a/common/Kconfig b/common/Kconfig
index 42696ce..54749c2 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -490,6 +490,14 @@
detect this situation and switch back to a different kernel/rootfs
image.
+if TPM
+
+config TPM_LITE
+ bool "Lightweight TPM library"
+ default y
+
+endif
+
endmenu
menu "Debugging "
diff --git a/common/Makefile b/common/Makefile
index bb476ca..9bdeef7 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -27,6 +27,7 @@
obj-$(CONFIG_PASSWORD) += password.o
obj-$(CONFIG_MODULES) += module.o
extra-$(CONFIG_MODULES) += module.lds
+obj-$(CONFIG_TPM_LITE) += tlcl.o
ifdef CONFIG_DEFAULT_ENVIRONMENT
$(obj)/startup.o: include/generated/barebox_default_env.h
diff --git a/common/tlcl.c b/common/tlcl.c
new file mode 100644
index 0000000..5e1ecae
--- /dev/null
+++ b/common/tlcl.c
@@ -0,0 +1,334 @@
+/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* A lightweight TPM command library.
+ *
+ * The general idea is that TPM commands are array of bytes whose
+ * fields are mostly compile-time constant. The goal is to build much
+ * of the commands at compile time (or build time) and change some of
+ * the fields at run time as needed. The code in
+ * utility/tlcl_generator.c builds structures containing the commands,
+ * as well as the offsets of the fields that need to be set at run
+ * time.
+ */
+
+#include <common.h>
+#include <string.h>
+#include <tpm_lite/tlcl.h>
+#include <tpm.h>
+#include "tlcl_internal.h"
+#include "tlcl_structures.h"
+
+#ifdef FOR_TEST
+#include <stdio.h>
+#define VBDEBUG(format, args...) printf(format, ## args)
+#else
+#define VBDEBUG(format, args...) printk(KERN_DEBUG format, ## args)
+#endif
+
+#ifdef DEBUG
+#include <assert.h>
+#else
+#define assert(x) ((void)0)
+#endif
+
+#define VB2_ERROR_UNKNOWN -1
+#define VB2_SUCCESS 0
+
+static int tpm_send_receive(const uint8_t *request,
+ uint32_t request_length,
+ uint8_t *response,
+ uint32_t *response_length)
+{
+ size_t len = *response_length;
+ if (tis_sendrecv(request, request_length, response, &len))
+ return VB2_ERROR_UNKNOWN;
+ /* check 64->32bit overflow and (re)check response buffer overflow */
+ if (len > *response_length)
+ return VB2_ERROR_UNKNOWN;
+ *response_length = len;
+ return VB2_SUCCESS;
+}
+
+/* Sets the size field of a TPM command. */
+static inline void set_tpm_command_size(uint8_t* buffer, uint32_t size) {
+ to_tpm_uint32(buffer + sizeof(uint16_t), size);
+}
+
+/* Gets the size field of a TPM command. */
+__attribute__((unused))
+static inline int tpm_command_size(const uint8_t* buffer) {
+ uint32_t size;
+ from_tpm_uint32(buffer + sizeof(uint16_t), &size);
+ return (int) size;
+}
+
+/* Gets the code field of a TPM command. */
+static inline int tpm_command_code(const uint8_t* buffer) {
+ uint32_t code;
+ from_tpm_uint32(buffer + sizeof(uint16_t) + sizeof(uint32_t), &code);
+ return code;
+}
+
+/* Gets the return code field of a TPM result. */
+static inline int tpm_return_code(const uint8_t* buffer) {
+ return tpm_command_code(buffer);
+}
+
+/* Like TlclSendReceive below, but do not retry if NEEDS_SELFTEST or
+ * DOING_SELFTEST errors are returned.
+ */
+static uint32_t tlcl_send_receive_no_retry(const uint8_t* request,
+ uint8_t* response, int max_length) {
+ uint32_t response_length = max_length;
+ uint32_t result;
+
+ result = tpm_send_receive(request, tpm_command_size(request),
+ response, &response_length);
+ if (0 != result) {
+ /* Communication with TPM failed, so response is garbage */
+ VBDEBUG("TPM: command 0x%x send/receive failed: 0x%x\n",
+ tpm_command_code(request), result);
+ return result;
+ }
+ /* Otherwise, use the result code from the response */
+ result = tpm_return_code(response);
+
+ /* TODO: add paranoia about returned response_length vs. max_length
+ * (and possibly expected length from the response header). See
+ * crosbug.com/17017 */
+
+ VBDEBUG("TPM: command 0x%x returned 0x%x\n",
+ tpm_command_code(request), result);
+
+ return result;
+}
+
+
+/* Sends a TPM command and gets a response. Returns 0 if success or the TPM
+ * error code if error. Waits for the self test to complete if needed. */
+uint32_t tlcl_send_receive(const uint8_t* request, uint8_t* response,
+ int max_length) {
+ uint32_t result = tlcl_send_receive_no_retry(request, response,
+ max_length);
+ /* If the command fails because the self test has not completed, try it
+ * again after attempting to ensure that the self test has completed. */
+ if (result == TPM_E_NEEDS_SELFTEST || result == TPM_E_DOING_SELFTEST) {
+ result = tlcl_continue_self_test();
+ if (result != TPM_SUCCESS)
+ return result;
+#if defined(TPM_BLOCKING_CONTINUESELFTEST) || defined(VB_RECOVERY_MODE)
+ /* Retry only once */
+ result = tlcl_send_receive_no_retry(request, response,
+ max_length);
+#else
+ /* This needs serious testing. The TPM specification says: "iii.
+ * The caller MUST wait for the actions of TPM_ContinueSelfTest
+ * to complete before reissuing the command C1." But, if
+ * ContinueSelfTest is non-blocking, how do we know that the
+ * actions have completed other than trying again? */
+ do {
+ result = tlcl_send_receive_no_retry(request, response,
+ max_length);
+ } while (result == TPM_E_DOING_SELFTEST);
+#endif
+ }
+ return result;
+}
+
+/* Sends a command and returns the error code. */
+static uint32_t send(const uint8_t* command) {
+ uint8_t response[TPM_LARGE_ENOUGH_COMMAND_SIZE];
+ return tlcl_send_receive(command, response, sizeof(response));
+}
+
+/* Exported functions. */
+
+uint32_t tlcl_lib_init(void) {
+ if (tis_init())
+ return VB2_ERROR_UNKNOWN;
+ if (tis_open())
+ return VB2_ERROR_UNKNOWN;
+ return VB2_SUCCESS;
+}
+
+uint32_t tlcl_startup(void) {
+ VBDEBUG("TPM: Startup\n");
+ return send(tpm_startup_cmd.buffer);
+}
+
+uint32_t tlcl_resume(void) {
+ VBDEBUG("TPM: Resume\n");
+ return send(tpm_resume_cmd.buffer);
+}
+
+uint32_t tlcl_self_test_full(void)
+{
+ VBDEBUG("TPM: Self test full\n");
+ return send(tpm_selftestfull_cmd.buffer);
+}
+
+uint32_t tlcl_continue_self_test(void)
+{
+ uint8_t response[TPM_LARGE_ENOUGH_COMMAND_SIZE];
+ VBDEBUG("TPM: Continue self test\n");
+ /* Call the No Retry version of SendReceive to avoid recursion. */
+ return tlcl_send_receive_no_retry(tpm_continueselftest_cmd.buffer,
+ response, sizeof(response));
+}
+
+uint32_t tlcl_define_space(uint32_t index, uint32_t perm, uint32_t size)
+{
+ struct s_tpm_nv_definespace_cmd cmd;
+ VBDEBUG("TPM: TlclDefineSpace(0x%x, 0x%x, %d)\n", index, perm, size);
+ memcpy(&cmd, &tpm_nv_definespace_cmd, sizeof(cmd));
+ to_tpm_uint32(cmd.buffer + tpm_nv_definespace_cmd.index, index);
+ to_tpm_uint32(cmd.buffer + tpm_nv_definespace_cmd.perm, perm);
+ to_tpm_uint32(cmd.buffer + tpm_nv_definespace_cmd.size, size);
+ return send(cmd.buffer);
+}
+
+uint32_t tlcl_write(uint32_t index, const void* data, uint32_t length)
+{
+ struct s_tpm_nv_write_cmd cmd;
+ uint8_t response[TPM_LARGE_ENOUGH_COMMAND_SIZE];
+ const int total_length =
+ kTpmRequestHeaderLength + kWriteInfoLength + length;
+
+ VBDEBUG("TPM: tlcl_write(0x%x, %d)\n", index, length);
+ memcpy(&cmd, &tpm_nv_write_cmd, sizeof(cmd));
+ assert(total_length <= TPM_LARGE_ENOUGH_COMMAND_SIZE);
+ set_tpm_command_size(cmd.buffer, total_length);
+
+ to_tpm_uint32(cmd.buffer + tpm_nv_write_cmd.index, index);
+ to_tpm_uint32(cmd.buffer + tpm_nv_write_cmd.length, length);
+ memcpy(cmd.buffer + tpm_nv_write_cmd.data, data, length);
+
+ return tlcl_send_receive(cmd.buffer, response, sizeof(response));
+}
+
+uint32_t tlcl_read(uint32_t index, void* data, uint32_t length)
+{
+ struct s_tpm_nv_read_cmd cmd;
+ uint8_t response[TPM_LARGE_ENOUGH_COMMAND_SIZE];
+ uint32_t result_length;
+ uint32_t result;
+
+ VBDEBUG("TPM: tlcl_read(0x%x, %d)\n", index, length);
+ memcpy(&cmd, &tpm_nv_read_cmd, sizeof(cmd));
+ to_tpm_uint32(cmd.buffer + tpm_nv_read_cmd.index, index);
+ to_tpm_uint32(cmd.buffer + tpm_nv_read_cmd.length, length);
+
+ result = tlcl_send_receive(cmd.buffer, response, sizeof(response));
+ if (result == TPM_SUCCESS && length > 0) {
+ uint8_t* nv_read_cursor = response + kTpmResponseHeaderLength;
+ from_tpm_uint32(nv_read_cursor, &result_length);
+ nv_read_cursor += sizeof(uint32_t);
+ memcpy(data, nv_read_cursor, result_length);
+ }
+
+ return result;
+}
+
+
+uint32_t tlcl_assert_physical_presence(void) {
+ VBDEBUG("TPM: Asserting physical presence\n");
+ return send(tpm_ppassert_cmd.buffer);
+}
+
+uint32_t tlcl_physical_presence_cmd_enable(void) {
+ VBDEBUG("TPM: Enable the physical presence command\n");
+ return send(tpm_ppenable_cmd.buffer);
+}
+
+uint32_t tlcl_finalize_physical_presence(void) {
+ VBDEBUG("TPM: Enable PP cmd, disable HW pp, and set lifetime lock\n");
+ return send(tpm_finalizepp_cmd.buffer);
+}
+
+uint32_t tlcl_set_nv_locked(void) {
+ VBDEBUG("TPM: Set NV locked\n");
+ return tlcl_define_space(TPM_NV_INDEX_LOCK, 0, 0);
+}
+
+uint32_t tlcl_force_clear(void) {
+ VBDEBUG("TPM: Force clear\n");
+ return send(tpm_forceclear_cmd.buffer);
+}
+
+uint32_t tlcl_set_enable(void) {
+ VBDEBUG("TPM: Enabling TPM\n");
+ return send(tpm_physicalenable_cmd.buffer);
+}
+
+uint32_t tlcl_set_deactivated(uint8_t flag)
+{
+ struct s_tpm_physicalsetdeactivated_cmd cmd;
+ VBDEBUG("TPM: SetDeactivated(%d)\n", flag);
+ memcpy(&cmd, &tpm_physicalsetdeactivated_cmd, sizeof(cmd));
+ *(cmd.buffer + cmd.deactivated) = flag;
+ return send(cmd.buffer);
+}
+
+uint32_t tlcl_get_permanent_flags(TPM_PERMANENT_FLAGS* pflags)
+{
+ uint8_t response[TPM_LARGE_ENOUGH_COMMAND_SIZE];
+ uint32_t size;
+ uint32_t result = tlcl_send_receive(tpm_getflags_cmd.buffer, response,
+ sizeof(response));
+ if (result != TPM_SUCCESS)
+ return result;
+ from_tpm_uint32(response + kTpmResponseHeaderLength, &size);
+ assert(size == sizeof(TPM_PERMANENT_FLAGS));
+ memcpy(pflags, response + kTpmResponseHeaderLength + sizeof(size),
+ sizeof(TPM_PERMANENT_FLAGS));
+ return result;
+}
+
+uint32_t tlcl_get_flags(uint8_t* disable, uint8_t* deactivated,
+ uint8_t *nvlocked)
+{
+ TPM_PERMANENT_FLAGS pflags;
+ uint32_t result = tlcl_get_permanent_flags(&pflags);
+ if (result == TPM_SUCCESS) {
+ if (disable)
+ *disable = pflags.disable;
+ if (deactivated)
+ *deactivated = pflags.deactivated;
+ if (nvlocked)
+ *nvlocked = pflags.nvLocked;
+ VBDEBUG("TPM: flags disable=%d, deactivated=%d, nvlocked=%d\n",
+ pflags.disable, pflags.deactivated, pflags.nvLocked);
+ }
+ return result;
+}
+
+uint32_t tlcl_set_global_lock(void)
+{
+ uint32_t x;
+ VBDEBUG("TPM: Set global lock\n");
+ return tlcl_write(TPM_NV_INDEX0, (uint8_t*) &x, 0);
+}
+
+uint32_t tlcl_extend(int pcr_num, const uint8_t* in_digest,
+ uint8_t* out_digest)
+{
+ struct s_tpm_extend_cmd cmd;
+ uint8_t response[kTpmResponseHeaderLength + kPcrDigestLength];
+ uint32_t result;
+
+ memcpy(&cmd, &tpm_extend_cmd, sizeof(cmd));
+ to_tpm_uint32(cmd.buffer + tpm_extend_cmd.pcrNum, pcr_num);
+ memcpy(cmd.buffer + cmd.inDigest, in_digest, kPcrDigestLength);
+
+ result = tlcl_send_receive(cmd.buffer, response, sizeof(response));
+ if (result != TPM_SUCCESS)
+ return result;
+
+ if (out_digest)
+ memcpy(out_digest, response + kTpmResponseHeaderLength,
+ kPcrDigestLength);
+ return result;
+}
diff --git a/common/tlcl_internal.h b/common/tlcl_internal.h
new file mode 100644
index 0000000..8261b0d
--- /dev/null
+++ b/common/tlcl_internal.h
@@ -0,0 +1,61 @@
+/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef TPM_LITE_TLCL_INTERNAL_H_
+#define TPM_LITE_TLCL_INTERNAL_H_
+
+/*
+ * These numbers derive from adding the sizes of command fields as shown in the
+ * TPM commands manual.
+ */
+#define kTpmRequestHeaderLength 10
+#define kTpmResponseHeaderLength 10
+#define kTpmReadInfoLength 12
+#define kEncAuthLength 20
+#define kPcrDigestLength 20
+
+
+/*
+ * Conversion functions. to_tpm_TYPE puts a value of type TYPE into a TPM
+ * command buffer. from_tpm_TYPE gets a value of type TYPE from a TPM command
+ * buffer into a variable.
+ */
+__attribute__((unused))
+static inline void to_tpm_uint32(uint8_t *buffer, uint32_t x) {
+ buffer[0] = (uint8_t)(x >> 24);
+ buffer[1] = (uint8_t)((x >> 16) & 0xff);
+ buffer[2] = (uint8_t)((x >> 8) & 0xff);
+ buffer[3] = (uint8_t)(x & 0xff);
+}
+
+/*
+ * See comment for above function.
+ */
+__attribute__((unused))
+static inline void from_tpm_uint32(const uint8_t *buffer, uint32_t *x) {
+ *x = ((buffer[0] << 24) |
+ (buffer[1] << 16) |
+ (buffer[2] << 8) |
+ buffer[3]);
+}
+
+/*
+ * See comment for above function.
+ */
+__attribute__((unused))
+static inline void to_tpm_uint16(uint8_t *buffer, uint16_t x) {
+ buffer[0] = (uint8_t)(x >> 8);
+ buffer[1] = (uint8_t)(x & 0xff);
+}
+
+/*
+ * See comment for above function.
+ */
+__attribute__((unused))
+static inline void from_tpm_uint16(const uint8_t *buffer, uint16_t *x) {
+ *x = (buffer[0] << 8) | buffer[1];
+}
+
+#endif /* TPM_LITE_TLCL_INTERNAL_H_ */
diff --git a/common/tlcl_structures.h b/common/tlcl_structures.h
new file mode 100644
index 0000000..36c1bb9
--- /dev/null
+++ b/common/tlcl_structures.h
@@ -0,0 +1,138 @@
+/* This file is automatically generated */
+
+const struct s_tpm_extend_cmd{
+ uint8_t buffer[34];
+ uint16_t pcrNum;
+ uint16_t inDigest;
+} tpm_extend_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0x22, 0x0, 0x0, 0x0, 0x14, },
+10, 14, };
+
+const struct s_tpm_get_random_cmd{
+ uint8_t buffer[14];
+ uint16_t bytesRequested;
+} tpm_get_random_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0xe, 0x0, 0x0, 0x0, 0x46, },
+10, };
+
+const struct s_tpm_getownership_cmd{
+ uint8_t buffer[22];
+} tpm_getownership_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0x16, 0x0, 0x0, 0x0, 0x65, 0x0, 0x0, 0x0, 0x5, 0x0, 0x0, 0x0, 0x4, 0x0, 0x0, 0x1, 0x11, },
+};
+
+const struct s_tpm_getpermissions_cmd{
+ uint8_t buffer[22];
+ uint16_t index;
+} tpm_getpermissions_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0x16, 0x0, 0x0, 0x0, 0x65, 0x0, 0x0, 0x0, 0x11, 0x0, 0x0, 0x0, 0x4, },
+18, };
+
+const struct s_tpm_getstclearflags_cmd{
+ uint8_t buffer[22];
+} tpm_getstclearflags_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0x16, 0x0, 0x0, 0x0, 0x65, 0x0, 0x0, 0x0, 0x4, 0x0, 0x0, 0x0, 0x4, 0x0, 0x0, 0x1, 0x9, },
+};
+
+const struct s_tpm_getflags_cmd{
+ uint8_t buffer[22];
+} tpm_getflags_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0x16, 0x0, 0x0, 0x0, 0x65, 0x0, 0x0, 0x0, 0x4, 0x0, 0x0, 0x0, 0x4, 0x0, 0x0, 0x1, 0x8, },
+};
+
+const struct s_tpm_physicalsetdeactivated_cmd{
+ uint8_t buffer[11];
+ uint16_t deactivated;
+} tpm_physicalsetdeactivated_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0xb, 0x0, 0x0, 0x0, 0x72, },
+10, };
+
+const struct s_tpm_physicalenable_cmd{
+ uint8_t buffer[10];
+} tpm_physicalenable_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x6f, },
+};
+
+const struct s_tpm_physicaldisable_cmd{
+ uint8_t buffer[10];
+} tpm_physicaldisable_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x70, },
+};
+
+const struct s_tpm_forceclear_cmd{
+ uint8_t buffer[10];
+} tpm_forceclear_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x5d, },
+};
+
+const struct s_tpm_readpubek_cmd{
+ uint8_t buffer[30];
+} tpm_readpubek_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0x1e, 0x0, 0x0, 0x0, 0x7c, },
+};
+
+const struct s_tpm_continueselftest_cmd{
+ uint8_t buffer[10];
+} tpm_continueselftest_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x53, },
+};
+
+const struct s_tpm_selftestfull_cmd{
+ uint8_t buffer[10];
+} tpm_selftestfull_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x50, },
+};
+
+const struct s_tpm_resume_cmd{
+ uint8_t buffer[12];
+} tpm_resume_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0xc, 0x0, 0x0, 0x0, 0x99, 0x0, 0x2, },
+};
+
+const struct s_tpm_savestate_cmd{
+ uint8_t buffer[10];
+} tpm_savestate_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x98, },
+};
+
+const struct s_tpm_startup_cmd{
+ uint8_t buffer[12];
+} tpm_startup_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0xc, 0x0, 0x0, 0x0, 0x99, 0x0, 0x1, },
+};
+
+const struct s_tpm_finalizepp_cmd{
+ uint8_t buffer[12];
+} tpm_finalizepp_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0xc, 0x40, 0x0, 0x0, 0xa, 0x2, 0xa0, },
+};
+
+const struct s_tpm_pplock_cmd{
+ uint8_t buffer[12];
+} tpm_pplock_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0xc, 0x40, 0x0, 0x0, 0xa, 0x0, 0x4, },
+};
+
+const struct s_tpm_ppenable_cmd{
+ uint8_t buffer[12];
+} tpm_ppenable_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0xc, 0x40, 0x0, 0x0, 0xa, 0x0, 0x20, },
+};
+
+const struct s_tpm_ppassert_cmd{
+ uint8_t buffer[12];
+} tpm_ppassert_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0xc, 0x40, 0x0, 0x0, 0xa, 0x0, 0x8, },
+};
+
+const struct s_tpm_pcr_read_cmd{
+ uint8_t buffer[14];
+ uint16_t pcrNum;
+} tpm_pcr_read_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0xe, 0x0, 0x0, 0x0, 0x15, },
+10, };
+
+const struct s_tpm_nv_read_cmd{
+ uint8_t buffer[22];
+ uint16_t index;
+ uint16_t length;
+} tpm_nv_read_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0x16, 0x0, 0x0, 0x0, 0xcf, },
+10, 18, };
+
+const struct s_tpm_nv_write_cmd{
+ uint8_t buffer[256];
+ uint16_t index;
+ uint16_t length;
+ uint16_t data;
+} tpm_nv_write_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xcd, },
+10, 18, 22, };
+
+const struct s_tpm_nv_definespace_cmd{
+ uint8_t buffer[101];
+ uint16_t index;
+ uint16_t perm;
+ uint16_t size;
+} tpm_nv_definespace_cmd = {{0x0, 0xc1, 0x0, 0x0, 0x0, 0x65, 0x0, 0x0, 0x0, 0xcc, 0x0, 0x18, 0, 0, 0, 0, 0x0, 0x3, 0, 0, 0, 0x1f, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x0, 0x3, 0, 0, 0, 0x1f, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x0, 0x17, },
+12, 70, 77, };
+
+const int kWriteInfoLength = 12;
+const int kNvDataPublicPermissionsOffset = 60;
diff --git a/include/tpm_lite/tlcl.h b/include/tpm_lite/tlcl.h
new file mode 100644
index 0000000..7724592
--- /dev/null
+++ b/include/tpm_lite/tlcl.h
@@ -0,0 +1,137 @@
+/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/*
+ * TPM Lightweight Command Library.
+ *
+ * A low-level library for interfacing to TPM hardware or an emulator.
+ */
+
+#ifndef TPM_LITE_TLCL_H_
+#define TPM_LITE_TLCL_H_
+#include <stdint.h>
+
+#include "tss_constants.h"
+
+/*****************************************************************************/
+/* Functions implemented in tlcl.c */
+
+/**
+ * Call this first. Returns 0 if success, nonzero if error.
+ */
+uint32_t tlcl_lib_init(void);
+
+/**
+ * Perform a raw TPM request/response transaction.
+ */
+uint32_t tlcl_send_receive(const uint8_t *request, uint8_t *response,
+ int max_length);
+
+/* Commands */
+
+/**
+ * Send a TPM_Startup(ST_CLEAR). The TPM error code is returned (0 for
+ * success).
+ */
+uint32_t tlcl_startup(void);
+
+/**
+ * Resume by sending a TPM_Startup(ST_STATE). The TPM error code is returned
+ * (0 for success).
+ */
+uint32_t tlcl_resume(void);
+
+/**
+ * Run the self test.
+ *
+ * Note---this is synchronous. To run this in parallel with other firmware,
+ * use ContinueSelfTest(). The TPM error code is returned.
+ */
+uint32_t tlcl_self_test_full(void);
+
+/**
+ * Run the self test in the background.
+ */
+uint32_t tlcl_continue_self_test(void);
+
+/**
+ * Define a space with permission [perm]. [index] is the index for the space,
+ * [size] the usable data size. The TPM error code is returned.
+ */
+uint32_t tlcl_define_space(uint32_t index, uint32_t perm, uint32_t size);
+
+/**
+ * Write [length] bytes of [data] to space at [index]. The TPM error code is
+ * returned.
+ */
+uint32_t tlcl_write(uint32_t index, const void *data, uint32_t length);
+
+/**
+ * Read [length] bytes from space at [index] into [data]. The TPM error code
+ * is returned.
+ */
+uint32_t tlcl_read(uint32_t index, void *data, uint32_t length);
+
+/**
+ * Assert physical presence in software. The TPM error code is returned.
+ */
+uint32_t tlcl_assert_physical_presence(void);
+
+/**
+ * Enable the physical presence command. The TPM error code is returned.
+ */
+uint32_t tlcl_physical_presence_cmd_enable(void);
+
+/**
+ * Finalize the physical presence settings: sofware PP is enabled, hardware PP
+ * is disabled, and the lifetime lock is set. The TPM error code is returned.
+ */
+uint32_t tlcl_finalize_physical_presence(void);
+
+/**
+ * Set the nvLocked bit. The TPM error code is returned.
+ */
+uint32_t tlcl_set_nv_locked(void);
+
+/**
+ * Issue a ForceClear. The TPM error code is returned.
+ */
+uint32_t tlcl_force_clear(void);
+
+/**
+ * Issue a PhysicalEnable. The TPM error code is returned.
+ */
+uint32_t tlcl_set_enable(void);
+
+/**
+ * Issue a SetDeactivated. Pass 0 to activate. Returns result code.
+ */
+uint32_t tlcl_set_deactivated(uint8_t flag);
+
+/**
+ * Get flags of interest. Pointers for flags you aren't interested in may
+ * be NULL. The TPM error code is returned.
+ */
+uint32_t tlcl_get_flags(uint8_t *disable, uint8_t *deactivated,
+ uint8_t *nvlocked);
+
+/**
+ * Set the bGlobalLock flag, which only a reboot can clear. The TPM error
+ * code is returned.
+ */
+uint32_t tlcl_set_global_lock(void);
+
+/**
+ * Perform a TPM_Extend.
+ */
+uint32_t tlcl_extend(int pcr_num, const uint8_t *in_digest,
+ uint8_t *out_digest);
+
+/**
+ * Get the entire set of permanent flags.
+ */
+uint32_t tlcl_get_permanent_flags(TPM_PERMANENT_FLAGS *pflags);
+
+#endif /* TPM_LITE_TLCL_H_ */
diff --git a/include/tpm_lite/tss_constants.h b/include/tpm_lite/tss_constants.h
new file mode 100644
index 0000000..883a5ad
--- /dev/null
+++ b/include/tpm_lite/tss_constants.h
@@ -0,0 +1,96 @@
+/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * Some TPM constants and type definitions for standalone compilation for use
+ * in the firmware
+ */
+#ifndef VBOOT_REFERENCE_TSS_CONSTANTS_H_
+#define VBOOT_REFERENCE_TSS_CONSTANTS_H_
+#include <stdint.h>
+
+#define TPM_MAX_COMMAND_SIZE 4096
+#define TPM_LARGE_ENOUGH_COMMAND_SIZE 256 /* saves space in the firmware */
+#define TPM_PUBEK_SIZE 256
+#define TPM_PCR_DIGEST 20
+
+#define TPM_E_NON_FATAL 0x800
+
+#define TPM_SUCCESS ((uint32_t)0x00000000)
+
+#define TPM_E_AREA_LOCKED ((uint32_t)0x0000003c)
+#define TPM_E_BADINDEX ((uint32_t)0x00000002)
+#define TPM_E_BAD_PRESENCE ((uint32_t)0x0000002d)
+#define TPM_E_IOERROR ((uint32_t)0x0000001f)
+#define TPM_E_INVALID_POSTINIT ((uint32_t)0x00000026)
+#define TPM_E_MAXNVWRITES ((uint32_t)0x00000048)
+#define TPM_E_OWNER_SET ((uint32_t)0x00000014)
+
+#define TPM_E_NEEDS_SELFTEST ((uint32_t)(TPM_E_NON_FATAL + 1))
+#define TPM_E_DOING_SELFTEST ((uint32_t)(TPM_E_NON_FATAL + 2))
+
+#define TPM_E_ALREADY_INITIALIZED ((uint32_t)0x00005000) /* vboot local */
+#define TPM_E_INTERNAL_INCONSISTENCY ((uint32_t)0x00005001) /* vboot local */
+#define TPM_E_MUST_REBOOT ((uint32_t)0x00005002) /* vboot local */
+#define TPM_E_CORRUPTED_STATE ((uint32_t)0x00005003) /* vboot local */
+#define TPM_E_COMMUNICATION_ERROR ((uint32_t)0x00005004) /* vboot local */
+#define TPM_E_RESPONSE_TOO_LARGE ((uint32_t)0x00005005) /* vboot local */
+#define TPM_E_NO_DEVICE ((uint32_t)0x00005006) /* vboot local */
+#define TPM_E_INPUT_TOO_SMALL ((uint32_t)0x00005007) /* vboot local */
+#define TPM_E_WRITE_FAILURE ((uint32_t)0x00005008) /* vboot local */
+#define TPM_E_READ_EMPTY ((uint32_t)0x00005009) /* vboot local */
+#define TPM_E_READ_FAILURE ((uint32_t)0x0000500a) /* vboot local */
+
+#define TPM_NV_INDEX0 ((uint32_t)0x00000000)
+#define TPM_NV_INDEX_LOCK ((uint32_t)0xffffffff)
+#define TPM_NV_PER_GLOBALLOCK (((uint32_t)1)<<15)
+#define TPM_NV_PER_PPWRITE (((uint32_t)1)<<0)
+#define TPM_NV_PER_READ_STCLEAR (((uint32_t)1)<<31)
+#define TPM_NV_PER_WRITE_STCLEAR (((uint32_t)1)<<14)
+
+#define TPM_TAG_RQU_COMMAND ((uint16_t) 0xc1)
+#define TPM_TAG_RQU_AUTH1_COMMAND ((uint16_t) 0xc2)
+#define TPM_TAG_RQU_AUTH2_COMMAND ((uint16_t) 0xc3)
+
+#define TPM_TAG_RSP_COMMAND ((uint16_t) 0xc4)
+#define TPM_TAG_RSP_AUTH1_COMMAND ((uint16_t) 0xc5)
+#define TPM_TAG_RSP_AUTH2_COMMAND ((uint16_t) 0xc6)
+
+typedef uint8_t TSS_BOOL;
+typedef uint16_t TPM_STRUCTURE_TAG;
+
+typedef struct tdTPM_PERMANENT_FLAGS
+{
+ TPM_STRUCTURE_TAG tag;
+ TSS_BOOL disable;
+ TSS_BOOL ownership;
+ TSS_BOOL deactivated;
+ TSS_BOOL readPubek;
+ TSS_BOOL disableOwnerClear;
+ TSS_BOOL allowMaintenance;
+ TSS_BOOL physicalPresenceLifetimeLock;
+ TSS_BOOL physicalPresenceHWEnable;
+ TSS_BOOL physicalPresenceCMDEnable;
+ TSS_BOOL CEKPUsed;
+ TSS_BOOL TPMpost;
+ TSS_BOOL TPMpostLock;
+ TSS_BOOL FIPS;
+ TSS_BOOL Operator;
+ TSS_BOOL enableRevokeEK;
+ TSS_BOOL nvLocked;
+ TSS_BOOL readSRKPub;
+ TSS_BOOL tpmEstablished;
+ TSS_BOOL maintenanceDone;
+ TSS_BOOL disableFullDALogicInfo;
+} TPM_PERMANENT_FLAGS;
+
+typedef struct tdTPM_STCLEAR_FLAGS{
+ TPM_STRUCTURE_TAG tag;
+ TSS_BOOL deactivated;
+ TSS_BOOL disableForceClear;
+ TSS_BOOL physicalPresence;
+ TSS_BOOL physicalPresenceLock;
+ TSS_BOOL bGlobalLock;
+} TPM_STCLEAR_FLAGS;
+
+#endif /* VBOOT_REFERENCE_TSS_CONSTANTS_H_ */
