class UnixCrypt::Base
Public Class Methods
build(password, salt = nil, rounds = nil)
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# File lib/unix_crypt/base.rb, line 2 def self.build(password, salt = nil, rounds = nil) salt ||= generate_salt if salt.length > max_salt_length raise UnixCrypt::SaltTooLongError, "Salts longer than #{max_salt_length} characters are not permitted" end construct_password(password, salt, rounds) end
generate_salt()
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# File lib/unix_crypt/base.rb, line 15 def self.generate_salt # Generates a random salt using the same character set as the base64 encoding # used by the hash encoder. SecureRandom.base64((default_salt_length * 6 / 8.0).ceil).tr("+", ".")[0...default_salt_length] end
hash(password, salt, rounds = nil)
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# File lib/unix_crypt/base.rb, line 11 def self.hash(password, salt, rounds = nil) bit_specified_base64encode internal_hash(prepare_password(password), salt, rounds) end
Protected Class Methods
bit_specified_base64encode(input)
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# File lib/unix_crypt/base.rb, line 26 def self.bit_specified_base64encode(input) b64 = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" input = input.bytes.to_a output = "" byte_indexes.each do |i3, i2, i1| b1, b2, b3 = i1 && input[i1] || 0, i2 && input[i2] || 0, i3 && input[i3] || 0 output << b64[ b1 & 0b00111111] << b64[((b1 & 0b11000000) >> 6) | ((b2 & 0b00001111) << 2)] << b64[((b2 & 0b11110000) >> 4) | ((b3 & 0b00000011) << 4)] << b64[ (b3 & 0b11111100) >> 2] end remainder = 3 - (length % 3) remainder = 0 if remainder == 3 output[0..-1-remainder] end
construct_password(password, salt, rounds)
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# File lib/unix_crypt/base.rb, line 22 def self.construct_password(password, salt, rounds) "$#{identifier}$#{rounds_marker rounds}#{salt}$#{hash(password, salt, rounds)}" end
prepare_password(password)
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# File lib/unix_crypt/base.rb, line 46 def self.prepare_password(password) # For Ruby 1.9+, convert the password to UTF-8, then treat that new string # as binary for the digest methods. if password.respond_to?(:encode) password = password.encode("UTF-8") password.force_encoding("ASCII-8BIT") end password end
rounds_marker(rounds)
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# File lib/unix_crypt/base.rb, line 57 def self.rounds_marker(rounds) nil end