Module: Crypto::ScalarMult

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

Constant Summary collapse

PRIMITIVE = 
primitive.freeze
BYTES = 
bytes.freeze
SCALARBYTES = 
scalarbytes.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

.base(secret_key) ⇒ Object 



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# File 'lib/crypto/scalar_mult.rb', line 25

def base(secret_key)
  check_length(secret_key, SCALARBYTES, :SecretKey)

  public_key = zeros(BYTES)
  secret_key.readonly if secret_key.is_a?(Sodium::SecretBuffer)
  crypto_scalarmult_base(public_key, secret_key)

  public_key
ensure
  secret_key.noaccess if secret_key.is_a?(Sodium::SecretBuffer)
end

.scalarmut(secret_key, public_key) ⇒ Object 



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# File 'lib/crypto/scalar_mult.rb', line 37

def scalarmut(secret_key, public_key)
  check_length(secret_key, SCALARBYTES, :SecretKey)
  check_length(public_key, BYTES, :PublicKey)

  shared_secret = Sodium::SecretBuffer.new(BYTES)
  secret_key.readonly if secret_key.is_a?(Sodium::SecretBuffer)
  crypto_scalarmult(shared_secret, secret_key, public_key)
  shared_secret.noaccess

  shared_secret
ensure
  secret_key.noaccess if secret_key.is_a?(Sodium::SecretBuffer)
end