sha man page on DragonFly

sha man page on DragonFly

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SHA(1)									SHA(1)

NAME
       sha - file hashing utility

SYNOPSIS
       sha [-12345Vh] [file ...]

DESCRIPTION
       sha  is a simple program that hashes files. It uses the National Insti‐
       tute of Standards and Technology's Secure Hash Algorithm.  It  can  use
       SHA-1,  SHA-256,	 SHA-384,  or  SHA-512,	 which	generate respectively,
       hashes of 160, 256, 384, or 512 bits.  sha can be used  in  scripts  to
       do, for example, file integrity checking.

OPTIONS
       -1     Use SHA-1, which produces a 160-bit hash (40 hex digits).

       -2     Use SHA-256, which produces a 256-bit hash (64 hex digits).

       -3     Use SHA-384, which produces a 384-bit hash (96 hex digits).

       -5     Use SHA-512, which produces a 512-bit hash (128 hex digits).

       -V     Display version information.

       -h     Display help summary.

       file ...
	      One  or  more  files  to	hash.  If no files are given, stdin is
	      hashed.

       If neither -1, -2, -3, or -5 are given, then SHA-1 is  used.  (But  see
       note about SHA_DEFAULT below.)

ENVIRONMENT
       SHA_DEFAULT
	      The  default  hash  algorithm to use. ``1'' denotes SHA-1, ``2''
	      denotes  SHA-256,	 ``3''	denotes	 SHA-384,  and	``5''  denotes
	      SHA-512.	Only  the  first  character  is	 significant.  If  not
	      defined, SHA-1 is the default.

				August 19, 2001				SHA(1)

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