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git.ipfire.org Git - people/ms/u-boot.git/blob - common/cmd_tpm.c
2 * Copyright (c) 2011 The Chromium OS Authors.
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 #define MAX_TRANSACTION_SIZE 30
30 * tpm_write() expects a variable number of parameters: the internal address
31 * followed by data to write, byte by byte.
33 * Returns 0 on success or -1 on errors (wrong arguments or TPM failure).
35 static int tpm_process(int argc
, char * const argv
[], cmd_tbl_t
*cmdtp
)
37 u8 tpm_buffer
[MAX_TRANSACTION_SIZE
];
38 u32 write_size
, read_size
;
42 for (write_size
= 0; write_size
< argc
; write_size
++) {
43 u32 datum
= simple_strtoul(argv
[write_size
], &p
, 0);
44 if (*p
|| (datum
> 0xff)) {
45 printf("\n%s: bad data value\n\n", argv
[write_size
]);
49 tpm_buffer
[write_size
] = (u8
)datum
;
52 read_size
= sizeof(tpm_buffer
);
53 if (!tis_sendrecv(tpm_buffer
, write_size
, tpm_buffer
, &read_size
)) {
55 puts("Got TPM response:\n");
56 for (i
= 0; i
< read_size
; i
++)
57 printf(" %2.2x", tpm_buffer
[i
]);
61 puts("tpm command failed\n");
66 static int do_tpm(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
71 * Verify that in case it is present, the first argument, it is
72 * exactly one character in size.
75 puts("command should be at least six bytes in size\n");
80 puts("tis_init() failed!\n");
85 puts("tis_open() failed!\n");
89 rv
= tpm_process(argc
- 1, argv
+ 1, cmdtp
);
92 puts("tis_close() failed!\n");
99 U_BOOT_CMD(tpm
, MAX_TRANSACTION_SIZE
, 1, do_tpm
,
100 "<byte> [<byte> ...] - write data and read response",
101 "send arbitrary data (at least 6 bytes) to the TPM "
102 "device and read the response"