tpm2_takeownership man page

tpm2_takeownership(1) — Insert authorization values for the owner, endorsement and lockout authorizations.


tpm2_takeownership [Options]


tpm2_takeownership(1) - performs a hash operation on FILE and returns the results. If FILE is not specified, then data is read from stdin. If the results of the hash will be used in a signing operation that uses a restricted signing key, then the ticket returned by this command can indicate that the hash is safe to sign.


Common Options

This collection of options are common to many programs and provide information that many users may expect.

This collection of environment variables that may be used to configure the various TCTI modules available.

The values passed through these variables can be overridden on a per-command basis using the available command line options, see the TCTI_OPTIONS section.

The variables respected depend on how the software was configured.

Tcti Options

This collection of options are used to configure the varous TCTI modules available. They override any environment variables.

Password Formatting

Passwords are interpreted in two forms, string and hex-string. A string password is not interpreted, and is directly used for authorization. A hex-string, is converted from a hexidecimal form into a byte array form, thus allowing passwords with non-printable and/or terminal un-friendly characters.

By default passwords are assumed to be in the string form. Password form is specified with special prefix values, they are:


Set owner, endorsement and lockout authorizations to an empty auth value:

tpm2_takeownership -c -L oldlockoutpasswd

Set owner, endorsement and lockout authorizations to a new value:

tpm2_takeownership -o newo -e newe -l newl -O oldo -E olde -L oldl


0 on success or 1 on failure.


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SEPTEMBER 2017 tpm2-tools General Commands Manual