Class: Ccrypto::CipherConfig

Inherits:
Object
  • Object
show all
Includes:
AlgoConfig, TR::CondUtils
Defined in:
lib/ccrypto/configs/cipher_config.rb

Direct Known Subclasses

CipherEngineConfig, DirectCipherConfig

Instance Attribute Summary collapse

Attributes included from AlgoConfig

#provider_config

Instance Method Summary collapse

Methods included from AlgoConfig

include, #provider_info

Constructor Details

#initialize(algo, opts = { }, &block) ⇒ CipherConfig

Returns a new instance of CipherConfig.


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# File 'lib/ccrypto/configs/cipher_config.rb', line 18

def initialize(algo, opts = {  }, &block)
  @algo = algo

  @logger = Tlogger.new
  @logger.tag = :cipher_conf
  
  if not_empty?(opts) and opts.is_a?(Hash)
    @mode = opts[:mode]

    if is_mode?(:gcm)
      self.extend CipherGCMMode
      @logger.debug "Extending GCM mode"

      @auth_data = opts[:auth_data]
      @auth_tag = opts[:auth_tag]

      #p "auth data : #{@auth_data}"
    end

    @iv = opts[:iv] 
    @ivLength = opts[:ivLength] if is_empty?(@iv)

    @key = opts[:key]
    @keysize = opts[:keysize] if is_empty?(@key)

    @padding = opts[:padding]

    @cipherOps = opts[:cipherOps]
  end

  if block
    @mode = block.call(:mode)

    if is_mode?(:gcm)
      self.extend CipherGCMMode
      @logger.debug "Extending GCM mode"

      @auth_data = block.call(:auth_data)
      @auth_tag = block.call(:auth_tag)
    end

    @iv = block.call(:iv)
    @ivLength = block.call(:ivLength) || 16 if @iv.nil?

    @key = block.call(:key)
    @keysize = block.call(:keysize) if @key.nil?

    @padding = block.call(:padding)

    @cipherOps = block.call(:cipherOps)
  end

end

Instance Attribute Details

#algo ⇒ Object

Returns the value of attribute algo.


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# File 'lib/ccrypto/configs/cipher_config.rb', line 13

def algo
  @algo
end

#cipherOps ⇒ Object

Returns the value of attribute cipherOps.


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# File 'lib/ccrypto/configs/cipher_config.rb', line 16

def cipherOps
  @cipherOps
end

#iv ⇒ Object

Returns the value of attribute iv.


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# File 'lib/ccrypto/configs/cipher_config.rb', line 15

def iv
  @iv
end

#ivLength ⇒ Object

Returns the value of attribute ivLength.


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# File 'lib/ccrypto/configs/cipher_config.rb', line 15

def ivLength
  @ivLength
end

#key ⇒ Object

Returns the value of attribute key.


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# File 'lib/ccrypto/configs/cipher_config.rb', line 13

def key
  @key
end

#keysize ⇒ Object

Returns the value of attribute keysize.


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# File 'lib/ccrypto/configs/cipher_config.rb', line 14

def keysize
  @keysize
end

#mode ⇒ Object

Returns the value of attribute mode.


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# File 'lib/ccrypto/configs/cipher_config.rb', line 14

def mode
  @mode
end

#padding ⇒ Object

Returns the value of attribute padding.


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# File 'lib/ccrypto/configs/cipher_config.rb', line 14

def padding
  @padding
end

Instance Method Details

#decrypt_cipher_mode ⇒ Object 


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# File 'lib/ccrypto/configs/cipher_config.rb', line 108

def decrypt_cipher_mode
  @cipherOps = :decrypt
end

#encrypt_cipher_mode ⇒ Object 


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# File 'lib/ccrypto/configs/cipher_config.rb', line 96

def encrypt_cipher_mode
  @cipherOps = :encrypt
end

#has_iv? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/ccrypto/configs/cipher_config.rb', line 72

def has_iv?
  not_empty?(@iv)
end

#has_key? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/ccrypto/configs/cipher_config.rb', line 76

def has_key?
  not_empty?(@key)
end

#is_algo?(algo) ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/ccrypto/configs/cipher_config.rb', line 80

def is_algo?(algo)
  if @algo.nil? or is_empty?(@algo)
    false
  else
    (@algo.to_s.downcase =~ /#{algo}/) != nil
  end
end

#is_decrypt_cipher_mode? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/ccrypto/configs/cipher_config.rb', line 111

def is_decrypt_cipher_mode?
  case @cipherOps
  when :decrypt, :dec
    true
  else
    false
  end
end

#is_encrypt_cipher_mode? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/ccrypto/configs/cipher_config.rb', line 99

def is_encrypt_cipher_mode?
  case @cipherOps
  when :encrypt, :enc
    true
  else
    false
  end
end

#is_mode?(mode) ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/ccrypto/configs/cipher_config.rb', line 88

def is_mode?(mode)
  if @mode.nil? or is_empty?(@mode)
    false
  else
    (@mode.to_s.downcase =~ /#{mode.to_s}/) != nil
  end
end

#logger ⇒ Object 


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# File 'lib/ccrypto/configs/cipher_config.rb', line 124

def logger
  if @logger.nil?
    @logger = Tlogger.new
    @logger.tag = :cipher_conf
  end
  @logger
end

#to_s ⇒ Object 


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# File 'lib/ccrypto/configs/cipher_config.rb', line 120

def to_s
  "#{@algo}-#{@keysize}-#{@mode}-#{@padding}"
end