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shasum(1) [centos man page]

SHASUM(1)						User Contributed Perl Documentation						 SHASUM(1)

NAME
shasum - Print or Check SHA Checksums SYNOPSIS
Usage: shasum [OPTION]... [FILE]... Print or check SHA checksums. With no FILE, or when FILE is -, read standard input. -a, --algorithm 1 (default), 224, 256, 384, 512, 512224, 512256 -b, --binary read in binary mode -c, --check read SHA sums from the FILEs and check them -t, --text read in text mode (default) -p, --portable read in portable mode produces same digest on Windows/Unix/Mac -0, --01 read in BITS mode ASCII '0' interpreted as 0-bit, ASCII '1' interpreted as 1-bit, all other characters ignored The following two options are useful only when verifying checksums: -s, --status don't 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 When verifying SHA-512/224 or SHA-512/256 checksums, indicate the algorithm explicitly using the -a option, e.g. shasum -a 512224 -c checksumfile The sums are computed as described in FIPS-180-4. 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 (`*' for binary, ` ' for text, `?' for portable, `^' for BITS), and name for each FILE. Report shasum bugs to mshelor@cpan.org DESCRIPTION
Running shasum is often the quickest way to compute SHA message digests. The user simply feeds data to the script through files or standard input, and then collects the results from standard output. The following command shows how to compute digests for typical inputs such as the NIST test vector "abc": perl -e "print qq(abc)" | shasum Or, if you want to use SHA-256 instead of the default SHA-1, simply say: perl -e "print qq(abc)" | shasum -a 256 Since shasum mimics the behavior of the combined GNU sha1sum, sha224sum, sha256sum, sha384sum, and sha512sum programs, you can install this script as a convenient drop-in replacement. Unlike the GNU programs, shasum encompasses the full SHA standard by allowing partial-byte inputs. This is accomplished through the BITS option (-0). The following example computes the SHA-224 digest of the 7-bit message 0001100: perl -e "print qq(0001100)" | shasum -0 -a 224 AUTHOR
Copyright (c) 2003-2013 Mark Shelor <mshelor@cpan.org>. SEE ALSO
shasum is implemented using the Perl module Digest::SHA or Digest::SHA::PurePerl. perl v5.16.3 2013-06-26 SHASUM(1)

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SHASUM(1)						 Perl Programmers Reference Guide						 SHASUM(1)

NAME
shasum - Print or Check SHA Checksums SYNOPSIS
Usage: shasum [OPTION] [FILE]... or: shasum [OPTION] --check [FILE] Print or check SHA checksums. With no FILE, or when FILE is -, read standard input. -a, --algorithm 1 (default), 224, 256, 384, 512 -b, --binary read files in binary mode (default on DOS/Windows) -c, --check check SHA sums against given list -p, --portable read files in portable mode produces same digest on Windows/Unix/Mac -t, --text read files in text mode (default) The following two options are useful only when verifying checksums: -s, --status don't output anything, status code shows success -w, --warn warn about improperly formatted SHA checksum lines -h, --help display this help and exit -v, --version output version information and exit The sums are computed as described in FIPS PUB 180-2. 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 (`*' for binary, `?' for portable, ` ' for text), and name for each FILE. DESCRIPTION
The shasum script provides the easiest and most convenient way to compute SHA message digests. Rather than writing a program, the user simply feeds data to the script via the command line, and waits for the results to be printed on standard output. Data can be fed to shasum through files, standard input, or both. The following command shows how easy it is to compute digests for typical inputs such as the NIST test vector "abc": perl -e "print qw(abc)" | shasum Or, if you want to use SHA-256 instead of the default SHA-1, simply say: perl -e "print qw(abc)" | shasum -a 256 Since shasum uses the same interface employed by the familiar sha1sum program (and its somewhat outmoded anscestor md5sum), you can install this script as a convenient drop-in replacement. AUTHOR
Copyright (c) 2003-2008 Mark Shelor <mshelor@cpan.org>. SEE ALSO
shasum is implemented using the Perl module Digest::SHA or Digest::SHA::PurePerl. perl v5.12.1 2010-07-01 SHASUM(1)
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