From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: linux-integrity@vger.kernel.org
Cc: linux-crypto@vger.kernel.org,
linux-security-module@vger.kernel.org,
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Subject: [PATCH v6 03/12] tpm-buf: add cursor based functions for response parsing
Date: Mon, 09 Sep 2019 13:19:18 +0100 [thread overview]
Message-ID: <1568031558.6613.32.camel@HansenPartnership.com> (raw)
In-Reply-To: <1568031408.6613.29.camel@HansenPartnership.com>
It's very convenient when parsing responses to have a cursor you
simply move over the response extracting the data. Add such cursor
functions for the TPM unsigned integer types.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
---
drivers/char/tpm/tpm-buf.c | 26 ++++++++++++++++++++++++++
drivers/char/tpm/tpm.h | 4 ++++
2 files changed, 30 insertions(+)
diff --git a/drivers/char/tpm/tpm-buf.c b/drivers/char/tpm/tpm-buf.c
index 8c1ed8a14e01..553adb84b0ac 100644
--- a/drivers/char/tpm/tpm-buf.c
+++ b/drivers/char/tpm/tpm-buf.c
@@ -163,3 +163,29 @@ void tpm_buf_append_2b(struct tpm_buf *buf, struct tpm_buf *tpm2b)
}
EXPORT_SYMBOL_GPL(tpm_buf_append_2b);
+/* functions for unmarshalling data and moving the cursor */
+u8 tpm_get_inc_u8(const u8 **ptr)
+{
+ return *((*ptr)++);
+}
+EXPORT_SYMBOL_GPL(tpm_get_inc_u8);
+
+u16 tpm_get_inc_u16(const u8 **ptr)
+{
+ u16 val;
+
+ val = get_unaligned_be16(*ptr);
+ *ptr += sizeof(val);
+ return val;
+}
+EXPORT_SYMBOL_GPL(tpm_get_inc_u16);
+
+u32 tpm_get_inc_u32(const u8 **ptr)
+{
+ u32 val;
+
+ val = get_unaligned_be32(*ptr);
+ *ptr += sizeof(val);
+ return val;
+}
+EXPORT_SYMBOL_GPL(tpm_get_inc_u32);
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 7627917db345..d942188debc9 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -302,6 +302,10 @@ void tpm_buf_append_u16(struct tpm_buf *buf, const u16 value);
void tpm_buf_append_u32(struct tpm_buf *buf, const u32 value);
void tpm_buf_append_2b(struct tpm_buf *buf, struct tpm_buf *tpm2b);
+u8 tpm_get_inc_u8(const u8 **ptr);
+u16 tpm_get_inc_u16(const u8 **ptr);
+u32 tpm_get_inc_u32(const u8 **ptr);
+
extern struct class *tpm_class;
extern struct class *tpmrm_class;
extern dev_t tpm_devt;
--
2.16.4
next prev parent reply other threads:[~2019-09-09 12:19 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-09 12:16 [PATCH v6 00/12] add integrity and security to TPM2 transactions James Bottomley
2019-09-09 12:17 ` [PATCH v6 01/12] tpm-buf: move from static inlines to real functions James Bottomley
2019-09-20 14:06 ` Jarkko Sakkinen
2019-09-20 14:06 ` Jarkko Sakkinen
2019-09-20 15:53 ` James Bottomley
2019-09-09 12:18 ` [PATCH v6 02/12] tpm-buf: add handling for TPM2B types James Bottomley
2019-09-20 14:18 ` Jarkko Sakkinen
2019-09-24 11:12 ` James Bottomley
2019-09-25 12:34 ` Jarkko Sakkinen
2019-09-25 12:34 ` Jarkko Sakkinen
2019-09-09 12:19 ` James Bottomley [this message]
2019-09-09 12:19 ` [PATCH v6 04/12] tpm2-space: export the context save and load commands James Bottomley
2019-09-09 12:20 ` [PATCH v6 05/12] tpm2-sessions: Add full HMAC and encrypt/decrypt session handling James Bottomley
2019-09-20 14:34 ` Jarkko Sakkinen
2019-09-20 14:35 ` Jarkko Sakkinen
2019-09-24 11:18 ` James Bottomley
2019-09-09 12:21 ` [PATCH v6 06/12] tpm-buf: add tpm_buf_parameters() James Bottomley
2019-09-09 12:22 ` [PATCH v6 07/12] tpm2: add hmac checks to tpm2_pcr_extend() James Bottomley
2019-09-09 12:22 ` [PATCH v6 08/12] tpm2: add session encryption protection to tpm2_get_random() James Bottomley
2019-09-09 12:23 ` [PATCH v6 09/12] trusted keys: Add session encryption protection to the seal/unseal path James Bottomley
2019-09-09 12:24 ` [PATCH v6 10/12] tpm: add the null key name as a tpm2 sysfs variable James Bottomley
2019-09-09 12:25 ` [PATCH v6 11/12] Documentation: add tpm-security.rst James Bottomley
2019-09-09 12:26 ` [PATCH v6 12/12] tpm2-sessions: NOT FOR COMMITTING add sessions testing James Bottomley
2019-09-10 16:21 ` [PATCH v6 00/12] add integrity and security to TPM2 transactions Jarkko Sakkinen
2019-09-10 16:29 ` James Bottomley
2019-09-11 8:42 ` Jarkko Sakkinen
2019-09-11 9:40 ` Jarkko Sakkinen
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