Class: MooTool::Models::IMG4::IMG4Payload

Inherits:
Object
  • Object
show all
Includes:
Helpers::IMG4
Defined in:
lib/mootool/models/img4/img4_payload.rb

Constant Summary collapse

KEYBAG_TYPES = 
{
  1 => :PROD,
  2 => :DEV
}.freeze

Constants included from Helpers::IMG4

Helpers::IMG4::DECODE_TAGS, Helpers::IMG4::FIRMWARE_TAGS, Helpers::IMG4::HASH_LENGTHS, Helpers::IMG4::KEY_INSTANCE_TAGS, Helpers::IMG4::KVP_TAGS, Helpers::IMG4::OCTET_TAGS, Helpers::IMG4::SEQUENCE_TAGS, Helpers::IMG4::SIGNATURE_TAGS

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Helpers::IMG4

#construct, #construct_object, #decode_construct, parse_4cc

Constructor Details

#initialize(input) ⇒ IMG4Payload

Returns a new instance of IMG4Payload.



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# File 'lib/mootool/models/img4/img4_payload.rb', line 16

def initialize(input)
  @input = input
  @type = input.value[1].value
  @description = input.value[2].value
  @payload = MooTool::Models::Decompressor.new(input.value[3].value, @type)
  @keybag = parse_keybag(input.value[4]) if input.value[4]

  return unless input.value[5]

  @extensions = construct(input.value[5]).map do |extension|
    { extension[0] => extension[1].map(&:to_h).reduce({}, :merge) }
  end.reduce(&:merge)
end

Instance Attribute Details

#payload ⇒ Object (readonly)

Returns the value of attribute payload.



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# File 'lib/mootool/models/img4/img4_payload.rb', line 9

def payload
  @payload
end

#signature ⇒ Object (readonly)

Returns the value of attribute signature.



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# File 'lib/mootool/models/img4/img4_payload.rb', line 9

def signature
  @signature
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/mootool/models/img4/img4_payload.rb', line 9

def type
  @type
end

Instance Method Details

#hashes ⇒ Object 



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# File 'lib/mootool/models/img4/img4_payload.rb', line 58

def hashes
  results = [OpenSSL::Digest::SHA384.digest(to_bytes)]
  @payload.hashes.each do |hash|
    results << hash
  end
  results.uniq.map { |h| Models::Digest.create(h) }
end

#inspect ⇒ Object 



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# File 'lib/mootool/models/img4/img4_payload.rb', line 50

def inspect
  to_h.ai
end

#parse_keybag(input) ⇒ Object 



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# File 'lib/mootool/models/img4/img4_payload.rb', line 30

def parse_keybag(input)
  value = construct(OpenSSL::ASN1.decode(input))
  return value unless value.is_a? Array

  return value unless value.all?(OpenSSL::ASN1)

  value.map do |keybag|
    iv = Models::Digest.create(keybag[1].raw, 'IV')
    { KEYBAG_TYPES[keybag[0]] => { iv: iv, key: keybag[2] } }
  end.reduce(&:merge)
end

#to_bytes ⇒ Object 



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# File 'lib/mootool/models/img4/img4_payload.rb', line 54

def to_bytes
  @input.to_der
end

#to_h ⇒ Object 



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# File 'lib/mootool/models/img4/img4_payload.rb', line 42

def to_h
  result = { type: @type, description: @description, payload: @payload }

  result[:keybag] = @keybag if @keybag
  result[:extensions] = @extensions if @extensions
  result
end