return false;
        }
        return object1.equals(object2);
    }

    /**
     * Returns the hash code of the specified object, or 0 if the object is null.
     *
     * @param obj the object
     * @return the hash code or 0
     */
    public static int hashCode(final Object obj) {
        return obj == null ? 0 : obj.hashCode();
    }

    /**

Y ser compatible con todos ellos al mismo tiempo.

///

Crea una función de utilidad para hacer el hash de una contraseña que venga del usuario.

Y otra utilidad para verificar si una contraseña recibida coincide con el hash almacenado.

Y otra más para autenticar y devolver un usuario.

  /** Returns the platform preferred implementation of a map based on a hash table. */
  static <K extends @Nullable Object, V extends @Nullable Object>
      Map<K, V> newHashMapWithExpectedSize(int expectedSize) {
    return CompactHashMap.createWithExpectedSize(expectedSize);
  }

  /**
   * Returns the platform preferred implementation of an insertion ordered map based on a hash
   * table.
   */

        final StringBuilder buf = new StringBuilder(50);
        for (int i = 0; i < docid.length(); i += splitSize) {
            int hash = docid.substring(i).hashCode() % splitHashSize;
            if (hash < 0) {
                hash *= -1;
            }
            buf.append('_').append(Integer.toString(hash)).append('/');
        }
        buf.append(docid).append('.').append(imageExtention);
        return buf.toString();
    }

    try {
      tester.addEquivalenceGroup(group1Item1, group1Item2).test();
    } catch (AssertionFailedError expected) {
      String expectedMessage =
          "the hash (1) of TestObject{group=1, item=1} [group 1, item 1] must be "
              + "equal to the hash (2) of TestObject{group=1, item=2} [group 1, item 2]";
      if (!expected.getMessage().contains(expectedMessage)) {

    try {
      tester.addEquivalenceGroup(group1Item1, group1Item2).test();
    } catch (AssertionFailedError expected) {
      String expectedMessage =
          "the hash (1) of TestObject{group=1, item=1} [group 1, item 1] must be "
              + "equal to the hash (2) of TestObject{group=1, item=2} [group 1, item 2]";
      if (!expected.getMessage().contains(expectedMessage)) {

package cmd

import (
	"errors"
	"testing"

	"github.com/minio/minio/internal/crypto"
	"github.com/minio/minio/internal/hash"
)

var toAPIErrorTests = []struct {
	err     error
	errCode APIErrorCode
}{
	{err: hash.BadDigest{}, errCode: ErrBadDigest},
	{err: hash.SHA256Mismatch{}, errCode: ErrContentSHA256Mismatch},
	{err: IncompleteBody{}, errCode: ErrIncompleteBody},

		owner = false
	}

	return cred, owner, ErrNone
}

// sumHMAC calculate hmac between two input byte array.
func sumHMAC(key []byte, data []byte) []byte {
	hash := hmac.New(sha256.New, key)
	hash.Write(data)
	return hash.Sum(nil)
}

// extractSignedHeaders extract signed headers from Authorization header
func extractSignedHeaders(signedHeaders []string, r *http.Request) (http.Header, APIErrorCode) {

      }
    }
  }

  /**
   * Returns the bucket (in either the K-to-V or V-to-K tables) where elements with the specified
   * hash could be found, if present, or could be inserted.
   */
  private int bucket(int hash) {
    return hash & (hashTableKToV.length - 1);
  }

  /** Given a key, returns the index of the entry in the tables, or ABSENT if not found. */

- Omit nil or empty field when calculating container hash value to avoid hash changed. For a new field with a non-nil default value in the container spec, the hash would still get changed. ([#57741](https://github.com/kubernetes/kubernetes/pull/57741), [@dixudx](https://github.com/dixudx))