abstract byte[] hash(Algorithm algorithm, byte[] input);
  }

  private enum Algorithm {
    MD5("MD5", Hashing.md5()),
    SHA_1("SHA-1", Hashing.sha1()),
    SHA_256("SHA-256", Hashing.sha256()),
    SHA_384("SHA-384", Hashing.sha384()),
    SHA_512("SHA-512", Hashing.sha512());

    private final String algorithmName;
    private final HashFunction hashFn;

    Algorithm(String algorithmName, HashFunction hashFn) {

    abstract byte[] hash(Algorithm algorithm, byte[] input);
  }

  private enum Algorithm {
    MD5("MD5", Hashing.md5()),
    SHA_1("SHA-1", Hashing.sha1()),
    SHA_256("SHA-256", Hashing.sha256()),
    SHA_384("SHA-384", Hashing.sha384()),
    SHA_512("SHA-512", Hashing.sha512());

    private final String algorithmName;
    private final HashFunction hashFn;

    Algorithm(String algorithmName, HashFunction hashFn) {

  }

  /**
   * Returns a hash function implementing the SHA-384 algorithm (384 hash bits).
   *
   * @since 19.0
   */
  public static HashFunction sha384() {
    return Sha384Holder.SHA_384;
  }

  private static final class Sha384Holder {
    static final HashFunction SHA_384 =
        new MessageDigestHashFunction("SHA-384", "Hashing.sha384()");
  }

  }

  /**
   * Returns a hash function implementing the SHA-384 algorithm (384 hash bits).
   *
   * @since 19.0
   */
  public static HashFunction sha384() {
    return Sha384Holder.SHA_384;
  }

  private static final class Sha384Holder {
    static final HashFunction SHA_384 =
        new MessageDigestHashFunction("SHA-384", "Hashing.sha384()");
  }

    HashFunction hashFunction3b = Hashing.goodFastHash(256);
    HashFunction hashFunction4a = Hashing.goodFastHash(257);
    HashFunction hashFunction4b = Hashing.goodFastHash(384);

    new EqualsTester()
        .addEqualityGroup(hashFunction1a, hashFunction1b)
        .addEqualityGroup(hashFunction2a, hashFunction2b)
        .addEqualityGroup(hashFunction3a, hashFunction3b)

    HashFunction hashFunction3b = Hashing.goodFastHash(256);
    HashFunction hashFunction4a = Hashing.goodFastHash(257);
    HashFunction hashFunction4b = Hashing.goodFastHash(384);

    new EqualsTester()
        .addEqualityGroup(hashFunction1a, hashFunction1b)
        .addEqualityGroup(hashFunction2a, hashFunction2b)
        .addEqualityGroup(hashFunction3a, hashFunction3b)

instantiated with AES-256. // // Per Table 3, it has a security strength of 256 bits, a seed size of 384 bits, // a counter length of 128 bits, a reseed interval of 2^48 requests, and a // maximum request size of 2^19 bits (2^16 bytes, 64 KiB). // // We support a narrow range of parameters that fit the needs of our RNG: // AES-256, no derivation function, no personalization string, no prediction // resistance, and 384-bit additional input. type Counter struct { // c is instantiated with K as the key and V as...

## 0.33.0

* Upgrade Pydantic version to `0.30.0`. PR [#384](https://github.com/tiangolo/fastapi/pull/384) by [@jekirl](https://github.com/jekirl).

## 0.32.0

* Fix typo in docs for features. PR [#380](https://github.com/tiangolo/fastapi/pull/380) by [@MartinoMensio](https://github.com/MartinoMensio).