Class: Evervault::Crypto::Client

Inherits:
Object
  • Object
show all
Defined in:
lib/evervault/crypto/client.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(request_handler:, config: ::Evervault::Config.new) ⇒ Client

Returns a new instance of Client.



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# File 'lib/evervault/crypto/client.rb', line 18

def initialize(request_handler:, config: ::Evervault::Config.new)
  @config = config
  @p256 = Evervault::Crypto::Curves::P256.new
  @koblitz = Evervault::Crypto::Curves::Koblitz.new
  @ev_version = EV_VERSION[config.curve]
  response = request_handler.get('cages/key')
  key = config.curve == 'secp256k1' ? 'ecdhKey' : 'ecdhP256Key'
  @team_key = response[key]
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/evervault/crypto/client.rb', line 16

def config
  @config
end

Instance Method Details

#encrypt(data, role = nil) ⇒ Object 



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# File 'lib/evervault/crypto/client.rb', line 28

def encrypt(data, role = nil)
  if data.nil? || (data.instance_of?(String) && data.empty?)
    raise Evervault::Errors::EvervaultError, 'Data is required for encryption'
  end

  unless encryptable_data?(data) || data.instance_of?(Hash) || data.instance_of?(Array)
    raise Evervault::Errors::EvervaultError, "Encryption is not supported for #{data.class}"
  end

  traverse_and_encrypt(data, role)
end

#generate_metadata(role) ⇒ Object 



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# File 'lib/evervault/crypto/client.rb', line 40

def generate_metadata(role)
  buffer = []

  # Binary representation of a fixed map with 2 or 3 items, followed by the key-value pairs
  buffer.push(0x80 | (role.nil? ? 2 : 3))

  if role
    # Binary representation for a fixed string of length 2, followed by `dr` (for "data role")
    buffer.push(0xA2)
    buffer.push(*'dr'.bytes)
    # Binary representation for a fixed string of role name length, followed by the role name itself
    buffer.push(0xA0 | role.length)
    buffer.push(*role.bytes)
  end

  # Binary representation for a fixed string of length 2, followed by `eo` (for "encryption origin")
  buffer.push(0xA2)
  buffer.push(*'eo'.bytes)
  # Binary representation for the integer 8 (Ruby SDK)
  buffer.push(8)

  # Binary representation for a fixed string of length 2, followed by `et` (for "encryption timestamp")
  buffer.push(0xA2)
  buffer.push(*'et'.bytes)
  # Binary representation for a 4-byte unsigned integer (uint 32), followed by the epoch time (big-endian)
  buffer.push(0xCE)
  buffer.push(*[Time.now.to_i].pack('I!>').bytes)

  buffer.pack('C*')
end