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B2SUM(1)		     General Commands Manual			B2SUM(1)

NAME
     b2sum -- generate checksums using the BLAKE2 hash function

SYNOPSIS
     b2sum [-a algorithm] [-l length] [--tag] [file ...]
     b2sum [--help]

DESCRIPTION
     The  b2sum  command  generates checksums for files using the BLAKE2 crypto-
     graphic hash function and writes them to standard output.

     When [file ...] is empty or -, b2sum reads from standard input.

     -a algorithm  Specify a variant of BLAKE2 to use when generating checksums.
		   The variants are listed under the algorithms section, and the
		   default is blake2b.

     -l length	   Specify the digest length in bits. It  must	not  exceed  the
		   maximum  for  the variant of BLAKE2 being used, and must be a
		   multiple of 8.

     --tag	   Prepend the checksums with "ALGORITHM-NAME (file) =", a  for-
		   mat common on BSD systems.

     --help	   Display usage.

ALGORITHMS
     blake2b   optimized  for  64-bit  platforms and NEON-enabled ARMs, produces
	       digests of any size between 1 and 64 bytes

     blake2s   optimized for 8 to 32-bit platforms, produces digests of any size
	       between 1 and 32 bytes

     blake2bp  4-way parallel BLAKE2b

     blake2sp  8-way parallel BLAKE2s

SEE ALSO
     shasum(1)

STANDARDS
     RFC 7693  The BLAKE2 Cryptographic Hash and Message Authentication Code

AUTHORS
     b2sum is part of the BLAKE2 official implementation. BLAKE2 was designed by
     Jean-Philippe Aumasson, Samuel Neves, Zooko Wilcox-O'Hearn,  and  Christian
     Winnerlein.

     BLAKE2  is  based	on  the  SHA-3	proposal  BLAKE  which	was  designed by
     Jean-Philippe Aumasson, Luca Henzen, Willi Meier, and Raphael C.-W. Phan.

     BLAKE2, like BLAKE, relies on  the  ChaCha20  stream  cipher,  designed  by
     Daniel J. Bernstein.

     A	mailing list for BLAKE2 can be subscribed to by sending an empty message
     to info-subscribe@blake2.net.

     The four designers of BLAKE2 can be contacted at contact@blake2.net.

     This manual page was written by Scarlett.

FreeBSD ports 15.quarterly	February 20, 2016			B2SUM(1)
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