NAME

       tss2_changeauth(1)  - This command changes the authorization data of an entity referred to
       by the path.

SYNOPSIS

       tss2_changeauth [OPTIONS]

SEE ALSO

       fapi-config(5) to adjust Fapi parameters like the used cryptographic profile and  TCTI  or
       directories for the Fapi metadata storages.

       fapi-profile(5)  to determine the cryptographic algorithms and parameters for all keys and
       operations of a specific TPM interaction like the  name  hash  algorithm,  the  asymmetric
       signature algorithm, scheme and parameters and PCR bank selection.

DESCRIPTION

       tss2_changeauth(1) -

OPTIONS

       These are the available options:

       • -a, --authValue=STRING:

         The  new  UTF-8  password.   Optional  parameter.   If  it is neglected then the user is
         queried interactively for a password.  To set no password, this option  should  be  used
         with  the empty string (““).  The maximum password size is determined by the digest size
         of the chosen name hash algorithm in the cryptographic profile  (cf.,  fapi-profile(5)).
         For example, choosing SHA256 as hash algorithm, allows passwords of a maximum size of 32
         characters.

       • -p, --entityPath=STRING:

         The path identifying the entity to modify.

COMMON OPTIONS

       This collection of options are common to all tss2 programs and  provide  information  that
       many users may expect.

       • -h,  --help  [man|no-man]: Display the tools manpage.  By default, it attempts to invoke
         the manpager for the tool, however, on failure will output a short tool  summary.   This
         is  the  same  behavior  if  the “man” option argument is specified, however if explicit
         “man” is requested, the tool will provide errors from man on stderr.   If  the  “no-man”
         option if specified, or the manpager fails, the short options will be output to stdout.

         To  successfully  use  the  manpages feature requires the manpages to be installed or on
         MANPATH, See man(1) for more details.

       • -v, --version: Display version information for this tool, supported tctis and exit.

EXAMPLES

   Change a password for an entity HS/SRK/myRSACryptKey to M1
              tss2_changeauth --entityPath=HS/SRK/myRSACryptKey --authValue=M1

   Change a password for an entity HS/SRK/myRSACryptKey and ask the user to enter the password.
              tss2_changeauth --entityPath=HS/SRK/myRSACryptKey

RETURNS

       0 on success or 1 on failure.

BUGS

       Github Issues (https://github.com/tpm2-software/tpm2-tools/issues)

HELP

       See the Mailing List (https://lists.linuxfoundation.org/mailman/listinfo/tpm2)