getCountLog2 example

    // Prevent DoS attacks by refusing to hash large passwords.     if (strlen($password) > PasswordInterface::PASSWORD_MAX_LENGTH) {
      return FALSE;
    }

    // The first 12 characters of an existing hash are its setting string.     $setting = substr($setting, 0, 12);

    if ($setting[0] != '$' || $setting[2] != '$') {
      return FALSE;
    }
    $count_log2 = $this->getCountLog2($setting);
    // Stored hashes may have been encrypted with any iteration count. However     // we do not allow applying the algorithm for unreasonable low and high     // values respectively.     if ($count_log2 != $this->enforceLog2Boundaries($count_log2)) {
      return FALSE;
    }
    $salt = substr($setting, 4, 8);
    // Hashes must have an 8 character salt.     if (strlen($salt) != 8) {
      return FALSE;
    }

    

/** * Tests password hashing. * * @covers ::hash * @covers ::getCountLog2 * @covers ::base64Encode * @covers ::check * @covers ::generateSalt * @covers ::needsRehash */
  public function testPasswordHashing() {
    $this->assertSame(PhpassHashedPassword::MIN_HASH_COUNT, $this->passwordHasher->getCountLog2($this->hashedPassword), 'Hashed password has the minimum number of log2 iterations.');
    $this->assertNotEquals($this->hashedPassword, $this->md5HashedPassword, 'Password hashes not the same.');
    $this->assertTrue($this->passwordHasher->check($this->password, $this->md5HashedPassword), 'Password check succeeds.');
    $this->assertTrue($this->passwordHasher->check($this->password, $this->hashedPassword), 'Password check succeeds.');
    // Since the log2 setting hasn't changed and the user has a valid password,     // userNeedsNewHash() should return FALSE.     $this->assertFalse($this->passwordHasher->needsRehash($this->hashedPassword), 'Does not need a new hash.');
  }

  /** * Tests password rehashing. * * @covers ::__construct * @covers ::hash * @covers ::getCountLog2 * @covers ::check * @covers ::needsRehash */