Module: McAPI::Utils

Defined in:
lib/mcapi/encryption/utils/utils.rb

Overview

Utils module

Class Method Summary collapse

Class Method Details

.compute_body(config_param, body_map) ⇒ Object 



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# File 'lib/mcapi/encryption/utils/utils.rb', line 182

def self.compute_body(config_param, body_map)
  encryption_param?(config_param, body_map) ? body_map[0] : yield
end

.config?(endpoint, config) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mcapi/encryption/utils/utils.rb', line 174

def self.config?(endpoint, config)
  return unless endpoint

  endpoint = endpoint.split('?').shift
  conf = config['paths'].select { |e| endpoint.match(e['path']) }
  conf.empty? ? nil : conf[0]
end

.contains(config, props) ⇒ Object 



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# File 'lib/mcapi/encryption/utils/utils.rb', line 57

def self.contains(config, props)
  props.any? do |i|
    config.key? i
  end
end

.create_message_digest(digest) ⇒ Object

Create Digest object for the provided digest string



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# File 'lib/mcapi/encryption/utils/utils.rb', line 44

def self.create_message_digest(digest)
  return unless digest

  case digest.upcase
  when 'SHA-256', 'SHA256'
    OpenSSL::Digest::SHA256
  when 'SHA-512', 'SHA512'
    OpenSSL::Digest::SHA512
  else
    raise 'Digest algorithm not supported'
  end
end

.decode(data, encoding) ⇒ Object

Data decoding



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# File 'lib/mcapi/encryption/utils/utils.rb', line 28

def self.decode(data, encoding)
  return unless encoding

  case encoding.downcase
  when 'hex'
    [data].pack('H*')
  when 'base64'
    Base64.decode64(data)
  else
    raise 'Encoding not supported'
  end
end

.delete_node(path, obj, properties = []) ⇒ Object

Delete node from JSON object



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# File 'lib/mcapi/encryption/utils/utils.rb', line 101

def self.delete_node(path, obj, properties = [])
  return unless path && obj

  paths = path.split('.')
  to_delete = paths[paths.size - 1]
  paths.each_with_index do |e, index|
    prev = obj
    next unless obj[e]

    obj = obj[e]
    prev.delete(to_delete) if obj && index == paths.size - 1
  end
  obj.keys.each { |e| obj.delete(e) } if paths.length == 1 && paths[0] == '$'
  properties.each { |e| obj.delete(e) } if paths.empty?
end

.elem_from_path(path, obj) ⇒ Object

Get an element from the JSON path



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# File 'lib/mcapi/encryption/utils/utils.rb', line 153

def self.elem_from_path(path, obj)
  parent = nil
  paths = path.split('.')
  if path && !paths.empty?
    paths.each do |e|
      parent = obj
      obj = json_root?(e) ? obj : obj[e]
    end
  end
  { node: obj, parent: parent }
rescue StandardError
  nil
end

.encode(data, encoding) ⇒ Object

Data encoding



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# File 'lib/mcapi/encryption/utils/utils.rb', line 12

def self.encode(data, encoding)
  return unless encoding

  case encoding.downcase
  when 'hex'
    data.each_byte.map { |b| format('%02x', b.to_i) }.join
  when 'base64'
    Base64.encode64(data).delete("\n")
  else
    raise 'Encoding not supported'
  end
end

.encryption_param?(enc_param, body_map) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mcapi/encryption/utils/utils.rb', line 186

def self.encryption_param?(enc_param, body_map)
  enc_param.length == 1 && body_map.length == 1
end

.json_root?(elem) ⇒ Boolean

Check whether the encryption/decryption path refers to the root element

Returns:

  • (Boolean) 


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# File 'lib/mcapi/encryption/utils/utils.rb', line 170

def self.json_root?(elem)
  elem == '$'
end

.mutate_obj_prop(path, value, obj, src_path = nil, properties = []) ⇒ Object

Perform JSON object properties manipulations



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# File 'lib/mcapi/encryption/utils/utils.rb', line 66

def self.mutate_obj_prop(path, value, obj, src_path = nil, properties = [])
  tmp = obj
  prev = nil
  return obj unless path

  delete_node(src_path, obj, properties) if src_path
  paths = path.split('.')
  unless path == '$'
    paths.each do |e|
      tmp[e] = {} unless tmp[e]
      prev = tmp
      tmp = tmp[e]
    end
  end
  elem = path.split('.').pop
  if elem == '$'
    obj = value # replace root
  elsif value.is_a?(Hash) && !value.is_a?(Array)
    prev[elem] = {} unless prev[elem].is_a?(Hash)
    override_props(prev[elem], value)
  else
    prev[elem] = value
  end
  obj
end

.override_props(target, obj) ⇒ Object 



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# File 'lib/mcapi/encryption/utils/utils.rb', line 92

def self.override_props(target, obj)
  obj.each do |k, _|
    target[k] = obj[k]
  end
end

.parse_decrypted_payload(payload) ⇒ Object 



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# File 'lib/mcapi/encryption/utils/utils.rb', line 190

def self.parse_decrypted_payload(payload)
  parsed_payload =  payload.gsub("\\u000f", "")
  parsed_payload = parsed_payload.gsub("\\", "")
  if parsed_payload[0] == "\""
    parsed_payload = parsed_payload.delete_prefix('"').delete_suffix('"')
  end
  parsed_payload
end

.parse_header(raw) ⇒ Object

Parse raw HTTP Header



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# File 'lib/mcapi/encryption/utils/utils.rb', line 120

def self.parse_header(raw)
  raw = raw.partition("\n").last
  header = Hash.new([].freeze)
  field = nil
  raw.each_line do |line|
    case line
    when /^([A-Za-z0-9!\#$%&'*+\-.^_`|~]+):\s*(.*?)\s*\z/om
      field = Regexp.last_match(1)
      value = Regexp.last_match(2)
      field.downcase!
      header[field] = [] unless header.key?(field)
      header[field] << value
    when /^\s+(.*?)\s*\z/om
      value = Regexp.last_match(1)
      raise Exception, "bad header '#{line}'." unless field

      header[field][-1] << ' ' << value
    else
      raise Exception, "bad header '#{line}'."
    end
  end
  header.each do |_key, values|
    values.each do |value|
      value.strip!
      value.gsub!(/\s+/, ' ')
    end
  end
  header
end