swtpm_bios
Section: (8)
Updated: 2021-01-27
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NAME
swtpm_bios - BIOS simulation tool for swtpm
SYNOPSIS
swtpm_bios [OPTIONS]
DESCRIPTION
swtpm_bios is a tool that can send the commands to the
TPM (
swtpm
program) that typically are used by the
BIOS to initialize the
TPM.
The user can choose among several command line options to choose the
state the
TPM should be set to.
This command requires the environment variable TCSD_USE_TCP_DEVICE
to be set for communication via TCP. Otherwise it will use the device
set in the environment variable TPM_DEVICE or fall back to use
/dev/tpm0 to send the commands to. In TCP mode, the environment variable
TCSD_TCP_DEVICE_HOSTNAME is used to indicate the host to send the commands
to. By default localhost is assumed. The default TCP port is 6545 unless
the environment variable TCSD_TCP_DEVICE_PORT indicates another port.
In case of success 0 will be returned. In case a TPM error was
encountered the return code will be 128. In case of communcation
failure 255 is returned. In case the TPM needs to be reset to become
activated, 129 will be returned.
This command will send the following sequence of commands to the TPM.
- TPM_Startup(chosen mode) --- startup TPM
-
- TSC_PhysicalPresence(0x20) --- PhysicalPresenceCMDEnable
-
- TSC_PhysicalPresence(0x08) --- turn on physical presence
-
- TPM_GetCapability --- get permanent flags
-
- TPM_PhysicalEnable --- enable the TPM
-
- TPM_PhysicalSetDeactivated(0x0) --- activate TPM
-
- TPM_ContinueSelfTest --- continue self test
-
- TSC_PhysicalPresence(0x20) --- PhysicalPresenceCMDEnable
-
- TSC_PhysicalPresence(0x14) --- turn off physical presence & lock it
-
The following options are supported:
- --tpm-device <device>
-
Use the given device rather than the default /dev/tpm0. This option overrides
the TPM_DEVICE environment variable.
- --tcp <server>:<port>
-
Connect to the given server and port; if no server is given, 127.0.0.1 is used;
if port is not given, the default port 6545 is used.
- --unixio <path>
-
Connect to the given UnixIO path.
- -tpm2
-
The device is a TPM 2.
- -c
-
Send TPM_Startup(ST_CLEAR) (default). This instructs the TPM to start
with clear state.
- -s
-
Send TPM_Startup(ST_STATE). This instructs the TPM to start by restoring
previously saved state.
- -d
-
Send TPM_Startup(ST_DEACTIVATED). This instructs the TPM to start in
deactivated mode. This option has no effect on a TPM 2.
- -n
-
Don't send a TPM_Startup command.
- -o
-
Only send the startup command and nothing else.
- -ea
-
Make sure that the TPM is activated; if the TPM requires a reset, the program
will exist and return a return code of 129.
- -cs
-
Send a TPM_ContinueSelfTest command to a TPM 1.2 and a TPM2_IncrementalSelfTest
command to a TPM 2.
- -u
-
Give up physical presence on a TPM 1.2. In case of a TPM 2 set the platform
hierarchy to a random password.
- -v
-
Display version and exit.
- -h
-
Display the help screen and exit.
SEE ALSO
REPORTING BUGS
Report bugs to Stefan Berger <
stefanb@linux.vnet.ibm.com>