Function readXauthEntry

agent/agentssh/x11.go:583–648

(r io.Reader)

}

func readXauthEntry(r io.Reader) (xauthEntry, error) {
	var entry xauthEntry

	// Read family
	err := binary.Read(r, binary.BigEndian, &entry.family)
	if err != nil {
		return xauthEntry{}, xerrors.Errorf("failed to read family: %w", err)
	}

	// Read address
	var addressLength uint16
	err = binary.Read(r, binary.BigEndian, &addressLength)
	if err != nil {
		return xauthEntry{}, xerrors.Errorf("failed to read address length: %w", err)
	}

	addressBytes := make([]byte, addressLength)
	_, err = r.Read(addressBytes)
	if err != nil {
		return xauthEntry{}, xerrors.Errorf("failed to read address: %w", err)
	}
	entry.address = string(addressBytes)

	// Read display
	var displayLength uint16
	err = binary.Read(r, binary.BigEndian, &displayLength)
	if err != nil {
		return xauthEntry{}, xerrors.Errorf("failed to read display length: %w", err)
	}

	displayBytes := make([]byte, displayLength)
	_, err = r.Read(displayBytes)
	if err != nil {
		return xauthEntry{}, xerrors.Errorf("failed to read display: %w", err)
	}
	entry.display = string(displayBytes)

	// Read auth protocol
	var authProtocolLength uint16
	err = binary.Read(r, binary.BigEndian, &authProtocolLength)
	if err != nil {
		return xauthEntry{}, xerrors.Errorf("failed to read auth protocol length: %w", err)
	}

	authProtocolBytes := make([]byte, authProtocolLength)
	_, err = r.Read(authProtocolBytes)
	if err != nil {
		return xauthEntry{}, xerrors.Errorf("failed to read auth protocol: %w", err)
	}
	entry.authProtocol = string(authProtocolBytes)

	// Read auth cookie
	var authCookieLength uint16
	err = binary.Read(r, binary.BigEndian, &authCookieLength)
	if err != nil {
		return xauthEntry{}, xerrors.Errorf("failed to read auth cookie length: %w", err)
	}