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NAME
blakesum - Checksum utilities for the BLAKE-family of hashing functions
SYNOPSIS
bsum [-l bits] [-c | -B | -L | -U] [-xz] [file] ...
b224sum [-c | -B | -L | -U] [-xz] [file] ...
b256sum [-c | -B | -L | -U] [-xz] [file] ...
b384sum [-c | -B | -L | -U] [-xz] [file] ...
b512sum [-c | -B | -L | -U] [-xz] [file] ...
b2sum [-l bits | -X bits] [-c | -B | -L | -U] [-sxz] [file] ...
DESCRIPTION
Print or check BLAKE, BLAKE2, or BLAKE2X checksums.
bsum is used for BLAKE2 checksums, and b2sum is used for
BLAKE2 and BLAKE2X checksums.
b224sum is an alias for bsum -l 224.
b256sum is an alias for bsum -l 256.
b384sum is an alias for bsum -l 384.
b512sum is an alias for bsum -l 512.
OPTIONS
The following options are supported:
-B Output checksums in binary representation. This
suppresses the filenames and checksum delimiters.
Only the checksums are printed.
-c Read checksums from the file and check them against
the files on your systems. The input files files
should be formatted as the output of the program,
or similarly. This is not going to work if any of
the filenames in the input files starts with <space>
or <tab>, or if they contain a <newline>, unless the
-z option is also used.
-L Output checksums in lower-case hexadecimal
representation. (Default)
-l bits
For bsum:
Select version of the BLAKE algorithm. Valid
values are 224 (default), 256, 384, and 512.
For b2sum:
Select output size, valid values are multiples
of 8 between 8 and 512, inclusively, or if
the -s option is used between 8 and 256,
inclusively. (Default is maximum.)
-s (Only available in b2sum)
Use BLAKE2s instead of BLAKE2b.
-U Output checksums in upper-case hexadecimal
representation.
-X bits
(Only available in b2sum)
Use BLAKE2Xb instead of BLAKE2b or BLAKE2Xs instead
of BLAKE2s, and select the extended output function
output length, in bits; must be a non-zero multiple
of 8, and no greater than 34359738360 or (if the -s
option is used) 524280.
-x Convert input files from hexadecimal form to binary
form before calculating the checksums.
-z Lines end with NUL instead of LF. If used with -c,
this applies to read files (not the output), but it
will also apply more strict parsing and allow any
whitespace in file names.
OPERANDS
The following operands are supported:
file File to read. The standard input will be used - or no
file is specified.
EXIT STATUS
0 Successful completion.
1 Checksums did not match or a file did not exist.
2 An error occurred.
NOTES
BLAKE2X has not been finalised as of 2022-02-20.
SEE ALSO
sha3sum, sha256sum(1), sha512sum(1)
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