From b9dd4fabbeed0fcb8bb1811044266d13df8d379f Mon Sep 17 00:00:00 2001
From: Miquel Raynal <miquel.raynal@bootlin.com>
Date: Tue, 15 May 2018 11:57:20 +0200
Subject: tpm: add PCR authentication commands support

Add support for the TPM2_PCR_SetAuthPolicy and
TPM2_PCR_SetAuthValue commands.

Change the command file and the help accordingly.

Note: These commands could not be tested because the TPMs available
do not support them, however they could be useful for someone else.
The user is warned by the command help.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
---
 include/tpm-v2.h | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

(limited to 'include')

diff --git a/include/tpm-v2.h b/include/tpm-v2.h
index be1aa2c705..780e061975 100644
--- a/include/tpm-v2.h
+++ b/include/tpm-v2.h
@@ -80,11 +80,13 @@ enum tpm2_command_codes {
 	TPM2_CC_CLEAR		= 0x0126,
 	TPM2_CC_CLEARCONTROL	= 0x0127,
 	TPM2_CC_HIERCHANGEAUTH	= 0x0129,
+	TPM2_CC_PCR_SETAUTHPOL	= 0x012C,
 	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_CC_PCR_SETAUTHVAL	= 0x0183,
 };
 
 /**
@@ -230,4 +232,31 @@ u32 tpm2_dam_parameters(const char *pw, const ssize_t pw_sz,
 int tpm2_change_auth(u32 handle, const char *newpw, const ssize_t newpw_sz,
 		     const char *oldpw, const ssize_t oldpw_sz);
 
+/**
+ * Issue a TPM_PCR_SetAuthPolicy command.
+ *
+ * @pw		Platform password
+ * @pw_sz	Length of the password
+ * @index	Index of the PCR
+ * @digest	New key to access the PCR
+ *
+ * @return code of the operation
+ */
+u32 tpm2_pcr_setauthpolicy(const char *pw, const ssize_t pw_sz, u32 index,
+			   const char *key);
+
+/**
+ * Issue a TPM_PCR_SetAuthValue command.
+ *
+ * @pw		Platform password
+ * @pw_sz	Length of the password
+ * @index	Index of the PCR
+ * @digest	New key to access the PCR
+ * @key_sz	Length of the new key
+ *
+ * @return code of the operation
+ */
+u32 tpm2_pcr_setauthvalue(const char *pw, const ssize_t pw_sz, u32 index,
+			  const char *key, const ssize_t key_sz);
+
 #endif /* __TPM_V2_H */
-- 
cgit