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.\"
.IX Title "SHA3SUM 1p"
.TH SHA3SUM 1p "2014-06-01" "perl v5.20.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
sha3sum \- Print or Check SHA\-3 Checksums
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 3
\& Usage: sha3sum [OPTION]... [FILE]...
\& Print or check SHA\-3 checksums.
\& With no FILE, or when FILE is \-, read standard input.
\&
\&   \-a, \-\-algorithm   224 (default), 256, 384, 512, 0
\&   \-b, \-\-binary      read in binary mode
\&   \-c, \-\-check       read SHA\-3 sums from the FILEs and check them
\&   \-t, \-\-text        read in text mode (default)
\&   \-U, \-\-UNIVERSAL   read in Universal Newlines mode
\&                         produces same digest on Windows/Unix/Mac
\&   \-0, \-\-01          read in BITS mode
\&                         ASCII \*(Aq0\*(Aq interpreted as 0\-bit,
\&                         ASCII \*(Aq1\*(Aq interpreted as 1\-bit,
\&                         all other characters ignored
\&   \-p, \-\-portable    read in portable mode (to be deprecated)
\&
\& The following two options are useful only when verifying checksums:
\&   \-s, \-\-status      don\*(Aqt output anything, status code shows success
\&   \-w, \-\-warn        warn about improperly formatted checksum lines
\&
\&   \-h, \-\-help        display this help and exit
\&   \-v, \-\-version     output version information and exit
\&
\& The sums are computed as described in the Keccak SHA\-3 submission.
\& When checking, the input should be a former output of this program.
\& The default mode is to print a line with checksum, a character
\& indicating type (\`*\*(Aq for binary, \` \*(Aq for text, \`U\*(Aq for UNIVERSAL,
\& \`^\*(Aq for BITS, \`?\*(Aq for portable), and name for each FILE.
\&
\& Report sha3sum bugs to mshelor@cpan.org
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Running \fIsha3sum\fR is often the quickest way to compute \s-1SHA\-3\s0 message
digests.  The user simply feeds data to the script through files or
standard input, and then collects the results from standard output.
.PP
The following command shows how to compute digests for typical inputs
such as the \s-1NIST\s0 test vector \*(L"abc\*(R":
.PP
.Vb 1
\&        perl \-e "print qq(abc)" | sha3sum
.Ve
.PP
Or, if you want to use \s-1SHA3\-256\s0 instead of the default \s-1SHA3\-224,\s0
simply say:
.PP
.Vb 1
\&        perl \-e "print qq(abc)" | sha3sum \-a 256
.Ve
.PP
Unlike many other digest computation programs, \fIsha3sum\fR implements
the full \s-1SHA\-3\s0 standard by allowing partial-byte inputs, which can
be recognized through the \s-1BITS\s0 option (\fI\-0\fR).  The following example
computes the \s-1SHA3\-384\s0 digest of the 7\-bit message \fI0001100\fR:
.PP
.Vb 1
\&        perl \-e "print qq(0001100)" | sha3sum \-0 \-a 384
.Ve
.SH "AUTHOR"
.IX Header "AUTHOR"
Copyright (c) 2012\-2014 Mark Shelor <mshelor@cpan.org>.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIsha3sum\fR is implemented using the Perl module Digest::SHA3.