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Class: Digest::MD5

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, Base, Class
Instance Chain:
self, Base, Class, Instance
Inherits: Digest::Base
Defined in: ext/digest/md5/md5init.c,
ext/digest/md5/md5init.c

Overview

A class for calculating message digests using the MD5 Message-Digest Algorithm by RSA Data Security, Inc., described in RFC1321.

MD5 calculates a digest of 128 bits (16 bytes).

Examples

require 'digest'

# Compute a complete digest
Digest::MD5.hexdigest 'abc'      #=> "90015098..."

# Compute digest by chunks
md5 = Digest::MD5.new               # =>#<Digest::MD5>
md5.update "ab"
md5 << "c"                           # alias for #update
md5.hexdigest                        # => "90015098..."

# Use the same object to compute another digest
md5.reset
md5 << "message"
md5.hexdigest                        # => "78e73102..."

Class Method Summary

Class - Inherited

.base64digest

Returns the base64 encoded hash value of a given string.

.digest

Returns the hash value of a given string.

.file

Creates a digest object and reads a given file, name.

.hexdigest

Returns the hex-encoded hash value of a given string.

.new

Instance Method Summary

Base - Inherited

#<<

Update the digest using given string and return self.

#block_length

Return the block length of the digest in bytes.

#digest_length

Return the length of the hash value in bytes.

#reset

Reset the digest to its initial state and return self.

#update

Alias for Base#<<.

#initialize_copy, #finish

Instance - Included

#<<

Updates the digest using a given string and returns self.

#==

If a string is given, checks whether it is equal to the hex-encoded hash value of the digest object.

#base64digest

If none is given, returns the resulting hash value of the digest in a base64 encoded form, keeping the digest’s state.

#base64digest!

Returns the resulting hash value and resets the digest to the initial state.

#block_length

Returns the block length of the digest.

#bubblebabble

Returns the resulting hash value in a Bubblebabble encoded form.

#digest

If none is given, returns the resulting hash value of the digest, keeping the digest’s state.

#digest!

Returns the resulting hash value and resets the digest to the initial state.

#digest_length

Returns the length of the hash value of the digest.

#file

Updates the digest with the contents of a given file name and returns self.

#hexdigest

If none is given, returns the resulting hash value of the digest in a hex-encoded form, keeping the digest’s state.

#hexdigest!

Returns the resulting hash value in a hex-encoded form and resets the digest to the initial state.

#inspect

Creates a printable version of the digest object.

#length

Returns digest_obj.digest_length().

#new

Returns a new, initialized copy of the digest object.

#reset

Resets the digest to the initial state and returns self.

#size

Alias for Instance#length.

#to_s

Returns digest_obj.hexdigest().

#update

Alias for Instance#<<.

#finish

Finishes the digest and returns the resulting hash value.

Constructor Details

This class inherits a constructor from Digest::Class