NAME

       tss2_verifyquote(1) -

SYNOPSIS

       tss2_verifyquote [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_verifyquote(1) - This command verifies that the data returned by a quote is valid.  This includes

       • Reconstructing the quoteInfo’s PCR values from the eventLog (if an eventLog was provided)

       • Verifying the quoteInfo using the signature and the publicKeyPath

       The used signature verification scheme is specified in the cryptographic profile (cf., fapi-profile(5)).

       An application using tss2_verifyquote() will further have to

       • Assess the publicKey’s trustworthiness

       • Assess the eventLog entries’ trustworthiness

OPTIONS

       These are the available options:

       • -Q, --qualifyingData=FILENAME or - (for stdin):

         A nonce provided by the caller to ensure freshness of the signature.  Optional parameter.

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

         Returns the PCR event log for the chosen 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.

       • -q, --quoteInfo=FILENAME or - (for stdin):

         The JSON-encoded structure holding the inputs to the quote operation.  This includes the  digest  value
         and PCR values.

       • -k, --publicKeyPath=STRING:

         Identifies the signing key.  MAY be a path to the public key hierarchy /ext.

       • -i, --signature=FILENAME or - (for stdin):

         The signature over the quoted material.

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_verifyquote --publicKeyPath="ext/myNewParent" --qualifyingData=qualifyingData.file --quoteInfo=quoteInfo.file --signature=signature.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_verifyquote(1)