NAME

       b3sum - compute and check BLAKE3 hash

USAGE

       b3sum [FLAGS] [OPTIONS] [FILE]...

DESCRIPTION

       Print or check BLAKE3 checksums.

       With no FILE, or when FILE is -, read standard input.

   FLAGS:
       -c, --check
              Reads BLAKE3 sums from the [file]s and checks them

       -h, --help
              Prints help information

       --keyed
              Uses  the  keyed  mode.  The secret key is read from standard input, and it must be
              exactly 32 raw bytes.

       --no-mmap
              Disables memory mapping. Currently this also disables multithreading.

       --no-names
              Omits filenames in the output

       --quiet
              Skips printing OK for each successfully verified file.  Must be used with --check.

       --raw  Writes raw output bytes to stdout, rather than hex.  --no-names is implied. In this
              case, only a single input is allowed.

       -V, --version
              Prints version information

   OPTIONS:
       --derive-key <CONTEXT>
              Uses  the  key  derivation mode, with the given context string. Cannot be used with
              --keyed.

       -l, --length <LEN>
              The number of output bytes, prior to hex encoding (default 32)

       --num-threads <NUM>
              The maximum number of threads to use. By default, this is  the  number  of  logical
              cores.   If  this  flag is omitted, or if its value is 0, RAYON_NUM_THREADS is also
              respected.

   ARGS:
       <FILE>...
              Files to hash, or checkfiles to check. When no file is given, or when -  is  given,
              read standard input.

SEE ALSO