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 pa‐
       rameters 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)

tpm2-tools                                         APRIL 2019                                    tss2_pcrread(1)