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-.\" digest.txt -  -*- Indented-Text -*- created at: Fri May 25 08:13:50 JST 2001
-$RoughId: digest.txt,v 1.9 2001/07/13 19:46:51 knu Exp $
-$Id$
-
-** MD5(Class)
-
-A class to implement the MD5 Message-Digest Algorithm by RSA Data
-Security, Inc., described in RFC1321.
-
-Superclass: Digest::Base
-
-require 'digest/md5'
-
-** SHA1(Class)
-
-A class to implement the SHA-1 Secure Hash Algorithm by NIST (the US'
-National Institute of Standards and Technology), described in FIPS PUB
-180-1.
-
-Superclass: Digest::Base
-
-require 'digest/sha1'
-
-** SHA256(Class)
-** SHA384(Class)
-** SHA512(Class)
-
-Classes to implement the SHA-256/384/512 Secure Hash Algorithm(s) by
-NIST (the US' National Institute of Standards and Technology),
-described in FIPS PUB 180-2.
-
-Superclass: Digest::Base
-
-require 'digest/sha2'
-
-** RMD160(Class)
-
-A class to implement the RIPEMD-160 cryptographic hash function,
-designed by Hans Dobbertin, Antoon Bosselaers, and Bart Preneel.
-
-Superclass: Digest::Base
-
-require 'digest/rmd160'
-
-
-Those above classes provide a common interface as shown below.
-
-
-Class Methods:
-
-   new([str])
-
-	Creates a new digest object.  If a string argument is given,
-	it is added to the object. (see update.)
-
-   digest(str)
-
-	Immediately calculates and return the hash of the given
-	strings as a string.  Equivalent to new(str).digest.
-
-   hexdigest(str)
-
-	Immediately calculates and return the hash of the given
-	strings as a string of hexadecimal digits.  Equivalent to
-	new(str).hexdigest.
-
-Methods:
-
-   clone
-
-	Creates a copy of the digest object.
-
-   digest
-
-	Returns the hash of the added strings as a string of 16 bytes
-	for MD5, 20 bytes for SHA1 and RMD160, 32 bytes for SHA256, 48
-	bytes for SHA384, and 64 bytes for SHA512.
-
-   hexdigest
-   to_s
-
-	Returns the hash of the added strings as a string of 32
-	hexadecimal digits for MD5, 40 hexadecimal digits for SHA1 and
-	RMD160, 64 hexadecimal digits for SHA256, 96 hexadecimal
-	digits for SHA384, and 128 hexadecimal digits for SHA512.
-	This method is equal to:
-
-	def hexdigest
-	  digest.unpack("H*")[0]
-	end
-
-   update(str)
-   << str
-
-	Appends the string str to the digest object.  Repeated calls
-	are equivalent to a single call with the concatenation of all
-	the arguments, i.e. m.update(a); m.update(b) is equivalent to
-	m.update(a + b) and m << a << b is equivalent to m << a + b.
-
-   == md
-
-	Checks if the object is equal to the given digest object.
-
-   == str
-
-	Regards the value as either a digest value or a hexdigest
-	value (depending on the length) and checks if the object is
-	equal to the given string.
-
--------------------------------------------------------
-Local variables:
-fill-column: 70
-end: