lkml.org 
[lkml]   [2006]   [May]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PATCH 2/2] tpm: bios log parsing fixes
From
Date
This patch fixes the BINARY output format to actual ACPI TCPA log
structure for any userland tool easily parse the binary data with
reference to TCG PC specification.

Signed-off-by: Seiji Munetoh <seiji.munetoh@gmail.com>
--- linux-2.6.17-rc4/drivers/char/tpm/tpm_bios.c 2006-05-16
09:33:06.000000000 +0900
+++ linux-2.6.17-rc4-tpm/drivers/char/tpm/tpm_bios.c 2006-05-19
08:12:30.000000000 +0900
@@ -275,53 +285,13 @@ static int get_event_name(char *dest, st

static int tpm_binary_bios_measurements_show(struct seq_file *m, void
*v)
{
-
- char *eventname;
- char data[4];
- u32 help;
- int i, len;
struct tcpa_event *event = (struct tcpa_event *) v;
- unsigned char *event_entry =
- (unsigned char *) (v + sizeof(struct tcpa_event));
-
- eventname = kmalloc(MAX_TEXT_EVENT, GFP_KERNEL);
- if (!eventname) {
- printk(KERN_ERR "%s: ERROR - No Memory for event name\n ",
- __func__);
- return -ENOMEM;
- }
-
- /* 1st: PCR used is in little-endian format (4 bytes) */
- help = le32_to_cpu(event->pcr_index);
- memcpy(data, &help, 4);
- for (i = 0; i < 4; i++)
- seq_putc(m, data[i]);
-
- /* 2nd: SHA1 (20 bytes) */
- for (i = 0; i < 20; i++)
- seq_putc(m, event->pcr_value[i]);
+ char *data = (char *) v;
+ int i;

- /* 3rd: event type identifier (4 bytes) */
- help = le32_to_cpu(event->event_type);
- memcpy(data, &help, 4);
- for (i = 0; i < 4; i++)
+ for (i = 0;i < sizeof(struct tcpa_event) + event->event_size; i++)
seq_putc(m, data[i]);

- len = 0;
-
- len += get_event_name(eventname, event, event_entry);
-
- /* 4th: filename <= 255 + \'0' delimiter */
- if (len > TCG_EVENT_NAME_LEN_MAX)
- len = TCG_EVENT_NAME_LEN_MAX;
-
- for (i = 0; i < len; i++)
- seq_putc(m, eventname[i]);
-
- /* 5th: delimiter */
- seq_putc(m, '\0');
-
- kfree(eventname);
return 0;
}


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-05-19 01:31    [W:0.036 / U:7.368 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site