Class: Ccrypto::Java::ScryptEngine

Inherits:
Object
  • Object
show all
Includes:
DataConversion, TR::CondUtils
Defined in:
lib/ccrypto/java/engines/scrypt_engine.rb

Instance Method Summary collapse

Methods included from DataConversion

#from_b64, #from_b64_mime, #from_hex, included, #to_b64, #to_b64_mime, #to_bin, #to_hex, #to_java_bytes, #to_str

Constructor Details

#initialize(conf, &block) ⇒ ScryptEngine

Returns a new instance of ScryptEngine.

Raises:

  • (KDFEngineException) 


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# File 'lib/ccrypto/java/engines/scrypt_engine.rb', line 10

def initialize(conf, &block)

  raise KDFEngineException, "KDF config is expected" if not conf.is_a?(Ccrypto::KDFConfig)
  raise KDFEngineException, "Output bit length (outBitLength) value is not given or not a positive value (#{conf.outBitLength})" if is_empty?(conf.outBitLength) or conf.outBitLength <= 0
  @config = conf

  if is_empty?(@config.salt)
    @config.salt = ::Java::byte[16].new
    java.security.SecureRandom.getInstance("NativePRNG").next_bytes(@config.salt)
  end
end

Instance Method Details

#derive(input, output = :binary) ⇒ Object 



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# File 'lib/ccrypto/java/engines/scrypt_engine.rb', line 22

def derive(input, output = :binary)
  res =  org.bouncycastle.crypto.generators.SCrypt.generate(to_java_bytes(input), to_java_bytes(@config.salt),@config.cost, @config.blocksize, @config.parallel, @config.outBitLength/8)
  
  #logger.debug "scrypt output : #{res.inspect}"

  case output
  when :hex
    to_hex(res)
  when :b64
    to_b64(res)
  else
    res
  end
end