This is especially the case for user models, because:

* The **input model** needs to be able to have a password.
* The **output model** should not have a password.
* The **database model** would probably need to have a hashed password.

/// danger

Never store user's plaintext passwords. Always store a "secure hash" that you can then verify.

   *   <li>If the IPv6 address contains an embedded IPv4 address, the function hashes that.
   *   <li>Otherwise, it hashes the upper 64 bits of the IPv6 address.
   * </ul>
   *
   * <p>A "coerced" IPv4 address is equivalent to itself.
   *
   * <p>NOTE: This method is failsafe for security purposes: ALL IPv6 addresses (except localhost
   * (::1)) are hashed to avoid the security risk associated with extracting an embedded IPv4

   *
   * <ul>
   *   <li>Any part containing non-ASCII characters is considered valid.
   *   <li>Underscores ('_') are permitted wherever dashes ('-') are permitted.
   *   <li>Parts other than the final part may start with a digit, as mandated by <a
   *       href="https://tools.ietf.org/html/rfc1123#section-2">RFC 1123</a>.
   * </ul>
   *

	if cs == nil {
		return nil
	}
	r.contentHash = *cs
	if ignoreValue {
		// Do not validate, but allow for transfer
		return nil
	}

	r.contentHasher = cs.Type.Hasher()
	if r.contentHasher == nil {
		return ErrInvalidChecksum
	}
	return nil
}

func (r *Reader) Read(p []byte) (int, error) {
	n, err := r.src.Read(p)
	r.bytesRead += int64(n)
	if r.sha256 != nil {

	}
	return "", "", false
}

// canonicalizePodUID converts a Pod UID, as represented in a cgroup path, into
// a canonical form. Practically this means that we convert any punctuation to
// dashes, which is how the UID is represented within Kubernetes.
func canonicalizePodUID(uid string) types.UID {
	return types.UID(strings.Map(func(r rune) rune {
		if unicode.IsPunct(r) {
			r = '-'
		}
		return r

     * input).
     */
    int ordinal();
  }

  /** The bit set of the BloomFilter (not necessarily power of 2!) */
  private final LockFreeBitArray bits;

  /** Number of hashes per element */
  private final int numHashFunctions;

  /** The funnel to translate Ts to bytes */
  private final Funnel<? super T> funnel;

##### Porque usar hashing de senha

Se o seu banco de dados for roubado, o ladrão não terá as senhas em texto simples dos seus usuários, apenas os hashes.

Assim, o ladrão não poderá tentar usar essas mesmas senhas em outro sistema (como muitos usuários usam a mesma senha em todos os lugares, isso seria perigoso).

//// tab | Python 3.10+

```Python hl_lines="82-85"

            }
            if( sae.getNtStatus() == sae.NT_STATUS_ACCESS_VIOLATION ) {
                /* Server challenge no longer valid for
                 * externally supplied password hashes.
                 */
                resp.sendRedirect( req.getRequestURL().toString() );
                return;
            }
            resp.setHeader( "WWW-Authenticate", "NTLM" );
            if (offerBasic) {

final class Crc32cHashFunction extends AbstractHashFunction {
  static final HashFunction CRC_32_C = new Crc32cHashFunction();

  @Override
  public int bits() {
    return 32;
  }

  @Override
  public Hasher newHasher() {
    return new Crc32cHasher();
  }

  @Override
  public String toString() {
    return "Hashing.crc32c()";
  }

  static final class Crc32cHasher extends AbstractStreamingHasher {

  }

  private void assertEvents(String... events) {
    assertEquals(Arrays.toString(events), stopwatch.readEventsAndClear());
  }

  /**
   * The stopwatch gathers events and presents them as strings. R0.6 means a delay of 0.6 seconds
   * caused by the (R)ateLimiter U1.0 means the (U)ser caused the stopwatch to sleep for a second.
   */