Function assertApproximateSize

test/common/crypto.js:39–47

(key, expectedSize)

// Asserts that the size of the given key (in chars or bytes) is within 10% of
// the expected size.
function assertApproximateSize(key, expectedSize) {
  const u = typeof key === 'string' ? 'chars' : 'bytes';
  const min = Math.floor(0.9 * expectedSize);
  const max = Math.ceil(1.1 * expectedSize);
  assert(key.length >= min,
         `Key (${key.length} ${u}) is shorter than expected (${min} ${u})`);
  assert(key.length <= max,
         `Key (${key.length} ${u}) is longer than expected (${max} ${u})`);
}

// Tests that a key pair can be used for encryption / decryption.
function testEncryptDecrypt(publicKey, privateKey) {