return checkPreconditionsPUT(ctx, w, r, oi, opts)
		}
	}

	checksumType := hash.NewChecksumHeader(r.Header)
	if checksumType.Is(hash.ChecksumInvalid) {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidChecksum), r.URL)
		return
	} else if checksumType.IsSet() && !checksumType.Is(hash.ChecksumTrailing) {
		opts.WantChecksum = &hash.Checksum{Type: checksumType}
	}

	if opts.WantChecksum != nil {

		apiErr = ErrEntityTooSmall
	case SignatureDoesNotMatch:
		apiErr = ErrSignatureDoesNotMatch
	case hash.SHA256Mismatch:
		apiErr = ErrContentSHA256Mismatch
	case hash.ChecksumMismatch:
		apiErr = ErrContentChecksumMismatch
	case hash.SizeTooSmall:
		apiErr = ErrEntityTooSmall
	case hash.SizeTooLarge:
		apiErr = ErrEntityTooLarge
	case NotImplemented:
		apiErr = ErrNotImplemented
	case PartTooBig:

// md5sum
type SealMD5CurrFn func([]byte) []byte

// PutObjReader is a type that wraps sio.EncryptReader and
// underlying hash.Reader in a struct
type PutObjReader struct {
	*hash.Reader              // actual data stream
	rawReader    *hash.Reader // original data stream
	sealMD5Fn    SealMD5CurrFn
}

// Size returns the absolute number of bytes the Reader

  }

  /**
   * Computes the hash code of the {@code file} using {@code hashFunction}.
   *
   * @param file the file to read
   * @param hashFunction the hash function to use to hash the data
   * @return the {@link HashCode} of all of the bytes in the file
   * @throws IOException if an I/O error occurs
   * @since 12.0
   * @deprecated Prefer {@code asByteSource(file).hash(hashFunction)}.
   */
  @Deprecated

And be compatible with all of them at the same time.

///

Create a utility function to hash a password coming from the user.

And another utility to verify if a received password matches the hash stored.

And another one to authenticate and return a user.

          && Objects.equals(getUpperEndpoint(), r.getUpperEndpoint());
    }
    return false;
  }

  @Override
  public int hashCode() {
    return Objects.hash(
        comparator,
        getLowerEndpoint(),
        getLowerBoundType(),
        getUpperEndpoint(),
        getUpperBoundType());
  }

  @LazyInit private transient @Nullable GeneralRange<T> reverse;

  /**
   * Returns a hash code for {@code value}; obsolete alternative to {@link Integer#hashCode(int)}.
   *
   * @param value a primitive {@code int} value
   * @return a hash code for the value
   */
  @InlineMe(replacement = "Integer.hashCode(value)")
  @InlineMeValidationDisabled(
      "The hash code of a int is the int itself, so it's simplest to return that.")

    --hash=sha256:0af291f4fe114be0280cdd29d533696a77b5b49cfde5467176ecab32353395c4 \
    --hash=sha256:0f55e69f030f7163dffe9fd0752b32f070566451afe180f99dbeeb81f511ad8d \
    --hash=sha256:1a2bc9f351a75ef49d664206d51f8e5ede9da246602dc2d2726837620ea034b2 \
    --hash=sha256:22e14b5d70560b8dd51ec22863f370d1e595ac3d024cb8ad7d308b4cd95f8313 \
    --hash=sha256:234ac59ea147c59ee4da87a0c0f098e9c8d169f4dc2a159ef720f1a61bbe27cd \

    --hash=sha256:0af291f4fe114be0280cdd29d533696a77b5b49cfde5467176ecab32353395c4 \
    --hash=sha256:0f55e69f030f7163dffe9fd0752b32f070566451afe180f99dbeeb81f511ad8d \
    --hash=sha256:1a2bc9f351a75ef49d664206d51f8e5ede9da246602dc2d2726837620ea034b2 \
    --hash=sha256:22e14b5d70560b8dd51ec22863f370d1e595ac3d024cb8ad7d308b4cd95f8313 \
    --hash=sha256:234ac59ea147c59ee4da87a0c0f098e9c8d169f4dc2a159ef720f1a61bbe27cd \

    --hash=sha256:0af291f4fe114be0280cdd29d533696a77b5b49cfde5467176ecab32353395c4 \
    --hash=sha256:0f55e69f030f7163dffe9fd0752b32f070566451afe180f99dbeeb81f511ad8d \
    --hash=sha256:1a2bc9f351a75ef49d664206d51f8e5ede9da246602dc2d2726837620ea034b2 \
    --hash=sha256:22e14b5d70560b8dd51ec22863f370d1e595ac3d024cb8ad7d308b4cd95f8313 \
    --hash=sha256:234ac59ea147c59ee4da87a0c0f098e9c8d169f4dc2a159ef720f1a61bbe27cd \