NAME

       tpm2_hash -  performs  a  hash  operation on a data buffer and returns the results. 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.

SYNOPSIS

       tpm2_hash[       COMMON       OPTIONS       ]       [      TCTI      OPTIONS      ]      [
       --hierarchy|--halg|--infile|--outfile|--ticket| ]

       performs a hash operation on a data buffer and returns the results. 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.

DESCRIPTION

       tpm2_hash performs a hash operation on a data buffer  and  returns  the  results.  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.

OPTIONS

       -H ,--hierarchy
              hierarchy to  use  for  the  ticket   e  TPM_RH_ENDORSEMENT    o  TPM_RH_OWNER    p
              TPM_RH_PLATFORM   n TPM_RH_NULL

       -g ,--halg
              algorithm  for the hash being computed  0x0004 TPM_ALG_SHA1   0x000B TPM_ALG_SHA256
              0x000C TPM_ALG_SHA384   0x000D TPM_ALG_SHA512   0x0012 TPM_ALG_SM3_256

       -I ,--infile
              file containning the data to be hashed

       -o ,--outfile
              file record the hash result

       -t ,--ticket
              file record the ticket

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

       -h, --help
              Display a manual describing the tool and its usage.

       -v, --version
              Display version information for this tool.

       -V, --verbose
              Increase the information that the tool prints to the console during its execution.

       [TCTI OPTIONS ]
              This collection of options are used to configure the varous TCTI modules available.

       -T, --tcti
              Select  the TCTI used for communication with the next component down the TSS stack.
              In most configurations this will be the TPM but it could be a simulator  or  proxy.
              Supported TCTIs are or “device” or “socket” .

       -d, --device-file
              Specify the TPM device file for use by the device TCTI. The default is /dev/tpm0.

       -R, --socket-address
              Specify  the  domain  name  or  IP  address used by the socket TCTI. The default is
              127.0.0.1.

       -p, --socket-port
              Specify the port number used by the socket TCTI. The default is 2321.

       ENVIRONMENT: TCTI
              This collection of environment variables that may be used to configure  the  varous
              TCTI  modules  available.   The  values  passed  through  these  variables  can  be
              overridden on a per-command basis using the available command line options.

       TPM2TOOLS_TCTI_NAME
              Select the TCTI used for communication with the next component down the TSS  stack.
              In  most  configurations this will be the TPM but it could be a simulator or proxy.
              See 'OPTIONS' section for the names of supported TCTIs.

       TPM2TOOLS_DEVICE_FILE
              Specify the TPM device file for use by the device TCTI.

       TPM2TOOLS_SOCKET_ADDRESS
              Specify the domain name or IP address used by the socket TCTI.

       TPM2TOOLS_SOCKET_PORT
              Specify the port number used by the socket TCTI.

EXAMPLES

       tpm2_hash

              tpm2_hash -H <e|o|p|n> -g 0x004 -I <inputFilename> -o <hashFilename> -t <ticketFilename>