Class: Blake2

Inherits:
Object
  • Object
show all
Defined in:
lib/blake2/key.rb,
ext/blake2_ext/rbext.c

Defined Under Namespace

Classes: Key

Instance Method Summary collapse

Instance Method Details

#digest(_input, _representation) ⇒ Object 



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# File 'ext/blake2_ext/rbext.c', line 41

VALUE m_blake2_digest(VALUE self, VALUE _input, VALUE _representation) {
  Blake2 *blake2;

  VALUE to_hex   = ID2SYM(rb_intern("to_hex"));
  VALUE to_bytes = ID2SYM(rb_intern("to_bytes"));

  char * input = RSTRING_PTR(_input);
  int input_length = RSTRING_LEN(_input);
  int i;

  Data_Get_Struct(self, Blake2, blake2);

  ID bytes_method = rb_intern("bytes");
  VALUE bytes_ary = rb_funcall(blake2->key, bytes_method, 0);
  int key_len = RARRAY_LEN(bytes_ary);

  uint8_t * key_bytes = (uint8_t*)ruby_xmalloc(key_len * sizeof(uint8_t));

  for(i = 0; i < key_len; i++) {
    VALUE byte = rb_ary_entry(bytes_ary, i);
    key_bytes[i] = NUM2INT(byte);
  }

  blake2s(blake2->output, input, key_bytes,
      blake2->output_length, input_length, key_len);

  if(_representation == to_bytes) {
    VALUE result = rb_ary_new2(blake2->output_length);

    for(i = 0; i < blake2->output_length; i++) {
      rb_ary_push(result, INT2NUM(blake2->output[i]));
    }

    return result;
  } else if(_representation == to_hex) {
    char * c_str = (char*)ruby_xmalloc(blake2->output_length * sizeof(char) * 2);

    for(i = 0; i < blake2->output_length; i++) {
      sprintf(c_str + (i * 2), "%02x", blake2->output[i]);
    }
    return rb_str_new2(c_str);
  } else {
    rb_raise(rb_eArgError, "Unknown representation", _representation);
  }
}