[U-Boot] [PATCH v4 12/32] tpm: prepare support for TPMv2.x commands

Miquel Raynal
2018-05-15T09:57:08Z

Choice between v1 and v2 compliant functions is done with the
configuration.

Create the various files that will receive TPMv2-only code on the same
scheme as for the TPMv1 code.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
cmd/Makefile | 1 +
cmd/tpm-v2.c | 33 ++++++++++++
drivers/tpm/tpm-uclass.c | 2 +
include/tpm-common.h | 6 +++
include/tpm-v2.h | 128 +++++++++++++++++++++++++++++++++++++++++++++++
lib/Makefile | 1 +
lib/tpm-v2.c | 11 ++++
7 files changed, 182 insertions(+)
create mode 100644 cmd/tpm-v2.c
create mode 100644 include/tpm-v2.h
create mode 100644 lib/tpm-v2.c

diff --git a/cmd/Makefile b/cmd/Makefile
index 66732085e8..bdb5475e07 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -120,6 +120,7 @@ obj-$(CONFIG_HUSH_PARSER) += test.o
obj-$(CONFIG_CMD_TPM) += tpm-common.o
obj-$(CONFIG_CMD_TPM_V1) += tpm-v1.o
obj-$(CONFIG_CMD_TPM_TEST) += tpm_test.o
+obj-$(CONFIG_CMD_TPM_V2) += tpm-v2.o
obj-$(CONFIG_CMD_CROS_EC) += cros_ec.o
obj-$(CONFIG_CMD_TSI148) += tsi148.o
obj-$(CONFIG_CMD_UBI) += ubi.o
diff --git a/cmd/tpm-v2.c b/cmd/tpm-v2.c
new file mode 100644
index 0000000000..606aa92409
--- /dev/null
+++ b/cmd/tpm-v2.c
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2018 Bootlin
+ * Author: Miquel Raynal <miquel.raynal@bootlin.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <log.h>
+#include <tpm-common.h>
+#include <tpm-v2.h>
+#include "tpm-user-utils.h"
+
+static cmd_tbl_t tpm2_commands[] = {
+ U_BOOT_CMD_MKENT(info, 0, 1, do_tpm_info, "", ""),
+ U_BOOT_CMD_MKENT(init, 0, 1, do_tpm_init, "", ""),
+};
+
+cmd_tbl_t *get_tpm_commands(unsigned int *size)
+{
+ *size = ARRAY_SIZE(tpm2_commands);
+
+ return tpm2_commands;
+}
+
+U_BOOT_CMD(tpm, CONFIG_SYS_MAXARGS, 1, do_tpm, "Issue a TPMv2.x command",
+"<command> [<arguments>]\n"
+"\n"
+"info\n"
+" Show information about the TPM.\n"
+"init\n"
+" Initialize the software stack. Always the first command to issue.\n"
+);
diff --git a/drivers/tpm/tpm-uclass.c b/drivers/tpm/tpm-uclass.c
index eb0e511c8f..cbf4873cbb 100644
--- a/drivers/tpm/tpm-uclass.c
+++ b/drivers/tpm/tpm-uclass.c
@@ -10,6 +10,8 @@
#include <linux/unaligned/be_byteshift.h>
#if defined(CONFIG_TPM_V1)
#include <tpm-v1.h>
+#elif defined(CONFIG_TPM_V2)
+#include <tpm-v2.h>
#endif
#include "tpm_internal.h"

diff --git a/include/tpm-common.h b/include/tpm-common.h
index 6b15466781..94f0f310b4 100644
--- a/include/tpm-common.h
+++ b/include/tpm-common.h
@@ -36,11 +36,17 @@ enum tpm_duration {
*
* @duration_ms: Length of each duration type in milliseconds
* @retry_time_ms: Time to wait before retrying receive
+ * @pcr_count: Number of PCR per bank
+ * @pcr_select_min: Minimum size in bytes of the pcrSelect array
* @buf: Buffer used during the exchanges with the chip
*/
struct tpm_chip_priv {
uint duration_ms[TPM_DURATION_COUNT];
uint retry_time_ms;
+#if defined(CONFIG_TPM_V2)
+ uint pcr_count;
+ uint pcr_select_min;
+#endif
u8 buf[TPM_DEV_BUFSIZE + sizeof(u8)]; /* Max buffer size + addr */
};

diff --git a/include/tpm-v2.h b/include/tpm-v2.h
new file mode 100644
index 0000000000..09a7a8b183
--- /dev/null
+++ b/include/tpm-v2.h
@@ -0,0 +1,128 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2018 Bootlin
+ * Author: Miquel Raynal <miquel.raynal@bootlin.com>
+ */
+
+#ifndef __TPM_V2_H
+#define __TPM_V2_H
+
+#include <tpm-common.h>
+
+#define TPM2_DIGEST_LEN 32
+
+/**
+ * TPM2 Structure Tags for command/response buffers.
+ *
+ * @TPM2_ST_NO_SESSIONS: the command does not need an authentication.
+ * @TPM2_ST_SESSIONS: the command needs an authentication.
+ */
+enum tpm2_structures {
+ TPM2_ST_NO_SESSIONS = 0x8001,
+ TPM2_ST_SESSIONS = 0x8002,
+};
+
+/**
+ * TPM2 type of boolean.
+ */
+enum tpm2_yes_no {
+ TPMI_YES = 1,
+ TPMI_NO = 0,
+};
+
+/**
+ * TPM2 startup values.
+ *
+ * @TPM2_SU_CLEAR: reset the internal state.
+ * @TPM2_SU_STATE: restore saved state (if any).
+ */
+enum tpm2_startup_types {
+ TPM2_SU_CLEAR = 0x0000,
+ TPM2_SU_STATE = 0x0001,
+};
+
+/**
+ * TPM2 permanent handles.
+ *
+ * @TPM2_RH_OWNER: refers to the 'owner' hierarchy.
+ * @TPM2_RS_PW: indicates a password.
+ * @TPM2_RH_LOCKOUT: refers to the 'lockout' hierarchy.
+ * @TPM2_RH_ENDORSEMENT: refers to the 'endorsement' hierarchy.
+ * @TPM2_RH_PLATFORM: refers to the 'platform' hierarchy.
+ */
+enum tpm2_handles {
+ TPM2_RH_OWNER = 0x40000001,
+ TPM2_RS_PW = 0x40000009,
+ TPM2_RH_LOCKOUT = 0x4000000A,
+ TPM2_RH_ENDORSEMENT = 0x4000000B,
+ TPM2_RH_PLATFORM = 0x4000000C,
+};
+
+/**
+ * TPM2 command codes used at the beginning of a buffer, gives the command.
+ *
+ * @TPM2_CC_STARTUP: TPM2_Startup().
+ * @TPM2_CC_SELF_TEST: TPM2_SelfTest().
+ * @TPM2_CC_CLEAR: TPM2_Clear().
+ * @TPM2_CC_CLEARCONTROL: TPM2_ClearControl().
+ * @TPM2_CC_HIERCHANGEAUTH: TPM2_HierarchyChangeAuth().
+ * @TPM2_CC_PCR_SETAUTHPOL: TPM2_PCR_SetAuthPolicy().
+ * @TPM2_CC_DAM_RESET: TPM2_DictionaryAttackLockReset().
+ * @TPM2_CC_DAM_PARAMETERS: TPM2_DictionaryAttackParameters().
+ * @TPM2_CC_GET_CAPABILITY: TPM2_GetCapibility().
+ * @TPM2_CC_PCR_READ: TPM2_PCR_Read().
+ * @TPM2_CC_PCR_EXTEND: TPM2_PCR_Extend().
+ * @TPM2_CC_PCR_SETAUTHVAL: TPM2_PCR_SetAuthValue().
+ */
+enum tpm2_command_codes {
+ TPM2_CC_STARTUP = 0x0144,
+ TPM2_CC_SELF_TEST = 0x0143,
+ TPM2_CC_CLEAR = 0x0126,
+ TPM2_CC_CLEARCONTROL = 0x0127,
+ TPM2_CC_HIERCHANGEAUTH = 0x0129,
+ TPM2_CC_DAM_RESET = 0x0139,
+ TPM2_CC_DAM_PARAMETERS = 0x013A,
+ TPM2_CC_GET_CAPABILITY = 0x017A,
+ TPM2_CC_PCR_READ = 0x017E,
+ TPM2_CC_PCR_EXTEND = 0x0182,
+};
+
+/**
+ * TPM2 return codes.
+ */
+enum tpm2_return_codes {
+ TPM2_RC_SUCCESS = 0x0000,
+ TPM2_RC_BAD_TAG = 0x001E,
+ TPM2_RC_FMT1 = 0x0080,
+ TPM2_RC_HASH = TPM2_RC_FMT1 + 0x0003,
+ TPM2_RC_VALUE = TPM2_RC_FMT1 + 0x0004,
+ TPM2_RC_SIZE = TPM2_RC_FMT1 + 0x0015,
+ TPM2_RC_BAD_AUTH = TPM2_RC_FMT1 + 0x0022,
+ TPM2_RC_HANDLE = TPM2_RC_FMT1 + 0x000B,
+ TPM2_RC_VER1 = 0x0100,
+ TPM2_RC_INITIALIZE = TPM2_RC_VER1 + 0x0000,
+ TPM2_RC_FAILURE = TPM2_RC_VER1 + 0x0001,
+ TPM2_RC_DISABLED = TPM2_RC_VER1 + 0x0020,
+ TPM2_RC_AUTH_MISSING = TPM2_RC_VER1 + 0x0025,
+ TPM2_RC_COMMAND_CODE = TPM2_RC_VER1 + 0x0043,
+ TPM2_RC_AUTHSIZE = TPM2_RC_VER1 + 0x0044,
+ TPM2_RC_AUTH_CONTEXT = TPM2_RC_VER1 + 0x0045,
+ TPM2_RC_NEEDS_TEST = TPM2_RC_VER1 + 0x0053,
+ TPM2_RC_WARN = 0x0900,
+ TPM2_RC_TESTING = TPM2_RC_WARN + 0x000A,
+ TPM2_RC_REFERENCE_H0 = TPM2_RC_WARN + 0x0010,
+ TPM2_RC_LOCKOUT = TPM2_RC_WARN + 0x0021,
+};
+
+/**
+ * TPM2 algorithms.
+ */
+enum tpm2_algorithms {
+ TPM2_ALG_XOR = 0x0A,
+ TPM2_ALG_SHA256 = 0x0B,
+ TPM2_ALG_SHA384 = 0x0C,
+ TPM2_ALG_SHA512 = 0x0D,
+ TPM2_ALG_NULL = 0x10,
+};
+
+#endif /* __TPM_V2_H */
diff --git a/lib/Makefile b/lib/Makefile
index 2052954841..ddf8db6be8 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -42,6 +42,7 @@ obj-y += rc4.o
obj-$(CONFIG_SUPPORT_EMMC_RPMB) += sha256.o
obj-$(CONFIG_TPM) += tpm-common.o
obj-$(CONFIG_TPM_V1) += tpm-v1.o
+obj-$(CONFIG_TPM_V2) += tpm-v2.o
obj-$(CONFIG_RBTREE) += rbtree.o
obj-$(CONFIG_BITREVERSE) += bitrev.o
obj-y += list_sort.o
diff --git a/lib/tpm-v2.c b/lib/tpm-v2.c
new file mode 100644
index 0000000000..ef4ebcd8ac
--- /dev/null
+++ b/lib/tpm-v2.c
@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2018 Bootlin
+ * Author: Miquel Raynal <miquel.raynal@bootlin.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <tpm-common.h>
+#include <tpm-v2.h>
+#include "tpm-utils.h"
--
2.14.1