NAME

       tss2_pcrread(1) -

SYNOPSIS

       tss2_pcrread [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_pcrread(1) - This command provides a PCRs value and corresponding event log.  The PCR
       bank to be used per PCR is defined in the cryptographic profile (cf., fapi-profile(5)).

OPTIONS

       These are the available options:

       • -o, --pcrValue=FILENAME or - (for stdout):

         Returns PCR digest.  Optional parameter.

       • -x, --pcrIndex=INTEGER:

         Identifies the PCR to read.

       • -f, --force:

         Force overwriting the output files.

       • -l, --pcrLog=FILENAME or - (for stdout):

         Returns the PCR log for that PCR.  Optional parameter.

         PCR  event  logs  are  a  list  (arbitrary  length  JSON  array) of log entries with the
         following content.

                - recnum: Unique record number
                - pcr: PCR index
                - digest: The digests
                - type: The type of event. At the moment the only possible value is: "LINUX_IMA" (legacy IMA)
                - eventDigest: Digest of the event; e.g. the digest of the measured file
                - eventName: Name of the event; e.g. the name of the measured file.

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.

EXAMPLE

              tss2_pcrread --pcrIndex=16 --pcrValue=pcrValue.file --pcrLog=pcrLog.file

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)