tpmtool(1) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | EXIT STATUS | SEE ALSO | AUTHORS | COPYRIGHT | BUGS | COLOPHON

tpmtool(1)                    User Commands                   tpmtool(1)

NAME         top

       tpmtool - GnuTLS TPM tool

SYNOPSIS         top

       tpmtool [-flags] [-flag [value]] [--option-name[[=| ]value]]

       All arguments must be options.

DESCRIPTION         top

       Program that allows handling cryptographic data from the TPM
       chip.

OPTIONS         top

       -d num, --debug=num Enable debugging.  This option takes an
       integer number as its argument.  The value of num is constrained
       to being:
           in the range 0 through 9999

       Specifies the debug level.

       --infile=file Input file.

       --outfile=str Output file.

       --generate-rsa Generate an RSA private-public key pair.

       Generates an RSA private-public key pair in the TPM chip.  The
       key may be stored in file system and protected by a PIN, or
       stored (registered) in the TPM chip flash.

       --register Any generated key will be registered in the TPM.  This
       option must appear in combination with the following options:
       generate-rsa.

       --signing Any generated key will be a signing key.  This option
       must not appear in combination with any of the following options:
       legacy.  This option must appear in combination with the
       following options: generate-rsa.

       --legacy Any generated key will be a legacy key.  This option
       must not appear in combination with any of the following options:
       signing.  This option must appear in combination with the
       following options: generate-rsa.

       --user Any registered key will be a user key.  This option must
       not appear in combination with any of the following options:
       system.  This option must appear in combination with the
       following options: register.

       The generated key will be stored in a user specific persistent
       storage.

       --system Any registered key will be a system key.  This option
       must not appear in combination with any of the following options:
       user.  This option must appear in combination with the following
       options: register.

       The generated key will be stored in system persistent storage.

       --pubkey=url Prints the public key of the provided key.

       --list Lists all stored keys in the TPM.

       --delete=url Delete the key identified by the given URL (UUID).

       --test-sign=url Tests the signature operation of the provided
       object.

       It can be used to test the correct operation of the signature
       operation.  This operation will sign and verify the signed data.

       --sec-param=security parameter Specify the security level [low,
       legacy, medium, high, ultra].

       This is alternative to the bits option. Note however that the
       values allowed by the TPM chip are quantized and given values may
       be rounded up.

       --bits=num Specify the number of bits for key generate.  This
       option takes an integer number as its argument.

       --inder, --no-inder Use the DER format for keys.  The no-inder
       form will disable the option.

       The input files will be assumed to be in the portable DER format
       of TPM. The default format is a custom format used by various TPM
       tools

       --outder, --no-outder Use DER format for output keys.  The
       no-outder form will disable the option.

       The output will be in the TPM portable DER format.

       --srk-well-known SRK has well known password (20 bytes of zeros).

       -v arg, --version=arg Output version of program and exit.  The
       default mode is `v', a simple version.  The `c' mode will print
       copyright information and `n' will print the full copyright
       notice.

       -h, --help Display usage information and exit.

       -!, --more-help Pass the extended usage information through a
       pager.

EXAMPLES         top

              To generate a key that is to be stored in file system use:
                  $ tpmtool --generate-rsa --bits 2048 --outfile tpmkey.pem

              To generate a key that is to be stored in TPM's flash use:
                  $ tpmtool --generate-rsa --bits 2048 --register --user

              To get the public key of a TPM key use:
                  $ tpmtool --pubkey tpmkey:uuid=58ad734b-bde6-45c7-89d8-756a55ad1891;storage=user           --outfile pubkey.pem

              or if the key is stored in the file system:
                  $ tpmtool --pubkey tpmkey:file=tmpkey.pem --outfile pubkey.pem

              To list all keys stored in TPM use:
                  $ tpmtool --list

EXIT STATUS         top

       One of the following exit values will be returned:

       0  (EXIT_SUCCESS) Successful program execution.

       1  (EXIT_FAILURE) The operation failed or the command syntax was
       not valid.

SEE ALSO         top

              p11tool(1), certtool(1)

AUTHORS         top


COPYRIGHT         top

       Copyright (C) 2020-2023 Free Software Foundation, and others all
       rights reserved.  This program is released under the terms of the
       GNU General Public License, version 3 or later

BUGS         top

       Please send bug reports to: bugs@gnutls.org

COLOPHON         top

       This page is part of the GnuTLS (GnuTLS Transport Layer Security
       Library) project.  Information about the project can be found at
       ⟨http://www.gnutls.org/⟩.  If you have a bug report for this
       manual page, send it to bugs@gnutls.org.  This page was obtained
       from the tarball gnutls-3.8.5.tar.xz fetched from
       ⟨http://www.gnutls.org/download.html⟩ on 2024-06-14.  If you
       discover any rendering problems in this HTML version of the page,
       or you believe there is a better or more up-to-date source for
       the page, or you have corrections or improvements to the
       information in this COLOPHON (which is not part of the original
       manual page), send a mail to man-pages@man7.org

3.8.5                          04 Apr 2024                    tpmtool(1)