NAME

       kcapi-hasher - Kernel Crypto API Message Digest Check Helper

SYNOPSIS

       kcapi-hasher [-n BASENAME] [OPTION]... -S|-L

       kcapi-hasher [-n BASENAME] [OPTION]... -c FILE

       kcapi-hasher [-n BASENAME] [OPTION]... FILE...

DESCRIPTION

       The kcapi-hasher application provides tool to compute and check the message digest as well
       as keyed message digest ciphers of the Linux kernel crypto API from the command line.

       The command line arguments, inputs and outputs  closely  mimick  those  of  other  similar
       utilities. I.e. sha1sum(1) sha512sum(1), and etc.

       This  is a multi-call binary, and algorithm can be selected by symlinking this application
       under the desired name. Separately application name can be overriden  directly  with  with
       name option, or desired hash can be selected with the hash option.

       The  input  data  can be provided either via STDIN or via a file that is referenced with a
       command line option.

OPTIONS

       -n, --name NAME
              Force a given application NAME from the  supported  list  of:  sha1sum,  sha224sum,
              sha256sum,  sha384sum,  sha512sum,  sm3sum,  sha3sum,  md5sum, fipscheck, fipshmac,
              sha1hmac, sha224hmac, sha256hmac, sha384hmac, sha512hmac, sm3hmac.

       -h, --hash HASH
              Use given HASH algorithm from the supported list of: sha1, sha224, sha256,  sha384,
              sha512, sm3, sha3-224, sha3-256, sha3-384, sha3-512.

       -S --self-sum
              Print checksum of this binary and exit

       -L --self-sum-lib
              Print checksum of the libkcapi library and exit

       -c --check FILE
              Verify hash sums from file

       -u --unkeyed
              Force unkeyed hash

       -t --truncate N
              Use hash truncated to N bits

       -q --status
              Suppress verification output

       --quiet
              Suppress only success messages

       -k --key-file FILE
              Use HMAC key from given file

       -K --key KEY
              Use KEY as the HMAC key

       --tag  Create a BSD-style checksum

       -d     Check directory for fipshmac; otherwise ignored

       -b, -P Compatibility hmaccalc options; ignored

       -z     NUL line termination

       -h, --help
              Display the help text.

       --version
              Display the version number of the kcapi-hasher application.

SEE ALSO

       kcapi-dgst(1) kcapi-enc(1) kcapi-rng(1)

                                            2023-07-04                            KCAPI-HASHER(1)