Module: BSONMiniHash::Hex

Defined in:
lib/bson_minihash/hex.rb

Constant Summary collapse

FORMAT = 
'H*'.freeze
TYPES = 
[:md5, :sha1, :hex].freeze

Class Method Summary collapse

Class Method Details

.digest(data, type) ⇒ Object 



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# File 'lib/bson_minihash/hex.rb', line 29

def self.digest(data, type)
  case type
    when :md5
      Digest::MD5.digest(data)
    when :sha1
      Digest::SHA1.digest(data)
    else
      raise ArgumentError, "type #{type} not supported"
  end
end

.pack(str, type = :hex) ⇒ Object 



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# File 'lib/bson_minihash/hex.rb', line 8

def self.pack(str, type = :hex)
  Hex.validate(str, type)
  [str].pack(FORMAT)
end

.unpack(packed_str) ⇒ Object 



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# File 'lib/bson_minihash/hex.rb', line 13

def self.unpack(packed_str)
  packed_str.unpack(FORMAT).first
end

.validate(str, type) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/bson_minihash/hex.rb', line 17

def self.validate(str, type)
  raise ArgumentError, "Hex strings must comprise of characters between a-f and 0-9" unless str.match /^[a-f0-9]+$/i

  case type
    when :md5
      raise ArgumentError, "MD5 strings must be 32 characters in length" unless str.length == 32
    when :sha1
      raise ArgumentError, "SHA1 strings must be 40 characters in length" unless str.length == 40
  end
  true
end