Module: Crypto::OneTimeAuth

Extended by:
FFI::Library, Sodium::Utils
Defined in:
lib/crypto/one_time_auth.rb

Defined Under Namespace

Classes: State

Constant Summary collapse

PRIMITIVE = 
primitive.freeze
BYTES = 
bytes.freeze
KEYBYTES = 
keybytes.freeze

Constants included from Sodium::Utils

Sodium::Utils::HEXY, Sodium::Utils::ZERO

Class Method Summary collapse

Methods included from Sodium::Utils

bin2hex, check_length, get_size, hex2bin, zeros

Class Method Details

.final(state) ⇒ Object 



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# File 'lib/crypto/one_time_auth.rb', line 72

def final(state)
  mac = zeros(BYTES)
  crypto_onetimeauth_final(state, mac)
  mac
end

.init(key) ⇒ Object 



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# File 'lib/crypto/one_time_auth.rb', line 56

def init(key)
  check_length(key, KEYBYTES, :SecretKey)

  state = State.new
  key.readonly if key.is_a?(Sodium::SecretBuffer)
  crypto_onetimeauth_init(state, key)

  state
ensure
  key.noaccess if key.is_a?(Sodium::SecretBuffer)
end

.onetimeauth(message, key) ⇒ Object 



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# File 'lib/crypto/one_time_auth.rb', line 34

def onetimeauth(message, key)
  check_length(key, KEYBYTES, :SecretKey)

  mac = zeros(BYTES)
  key.readonly if key.is_a?(Sodium::SecretBuffer)
  crypto_onetimeauth(mac, message, get_size(message), key)

  mac
ensure
  key.noaccess if key.is_a?(Sodium::SecretBuffer)
end

.update(state, message) ⇒ Object 



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# File 'lib/crypto/one_time_auth.rb', line 68

def update(state, message)
  crypto_onetimeauth_update(state, message, get_size(message))
end

.verify(mac, message, key) ⇒ Object 



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# File 'lib/crypto/one_time_auth.rb', line 46

def verify(mac, message, key)
  check_length(mac, BYTES, :Mac)
  check_length(key, KEYBYTES, :SecretKey)

  key.readonly if key.is_a?(Sodium::SecretBuffer)
  crypto_onetimeauth_verify(mac, message, get_size(message), key) == 0
ensure
  key.noaccess if key.is_a?(Sodium::SecretBuffer)
end