Module: Ed448::X448

Defined in:
lib/ed448/x448.rb

Constant Summary collapse

X448_PRIVATE_BYTES = 
56
X448_PUBLIC_BYTES = 
56

Class Method Summary collapse

Class Method Details

.derive_public_key(private_key) ⇒ Object 



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# File 'lib/ed448/x448.rb', line 8

def derive_public_key(private_key)
  private_key = FFI::MemoryPointer.new(:uchar, X448_PRIVATE_BYTES).put_bytes(0, private_key)
  public_key = FFI::MemoryPointer.new(:uchar, X448_PUBLIC_BYTES)
  Ed448.goldilocks_x448_derive_public_key(public_key, private_key)
  public_key.read_string(X448_PUBLIC_BYTES)
end

.dh(public_key, private_key) ⇒ Object 



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# File 'lib/ed448/x448.rb', line 15

def dh(public_key, private_key)
  private_key = FFI::MemoryPointer.new(:uchar, X448_PRIVATE_BYTES).put_bytes(0, private_key)
  public_key = FFI::MemoryPointer.new(:uchar, X448_PUBLIC_BYTES).put_bytes(0, public_key)
  shared_key = FFI::MemoryPointer.new(:uchar, X448_PUBLIC_BYTES)
  result = Ed448.goldilocks_x448(shared_key, public_key, private_key)
  raise 'goldilocks_x448 failed.' if result != -1

  shared_key.read_bytes(X448_PUBLIC_BYTES)
end