WP_Filesystem_SSH2::connect(): bool

161	public function connect() {162		/*163		 * Bail if the constructor recorded a configuration error. Connection and164		 * authentication errors are excluded so that a failed connection attempt165		 * can be retried on the same instance.166		 */167		if ( $this->errors->has_errors() && ! array_intersect( array( 'connect', 'auth' ), $this->errors->get_error_codes() ) ) {168			return false;169		}170 171		if ( ! isset( $this->options['hostkey'] ) ) {172			$this->link = @ssh2_connect( $this->options['hostname'], $this->options['port'] );173		} else {174			$this->link = @ssh2_connect( $this->options['hostname'], $this->options['port'], $this->options['hostkey'] );175		}176 177		if ( ! $this->link ) {178			$this->errors->add(179				'connect',180				sprintf(181					/* translators: %s: hostname:port */182					__( 'Failed to connect to SSH2 Server %s' ),183					$this->options['hostname'] . ':' . $this->options['port']184				)185			);186 187			return false;188		}189 190		if ( ! $this->keys ) {191			if ( ! @ssh2_auth_password( $this->link, $this->options['username'], $this->options['password'] ?? '' ) ) {192				$this->errors->add(193					'auth',194					sprintf(195						/* translators: %s: Username. */196						__( 'Username/Password incorrect for %s' ),197						$this->options['username']198					)199				);200 201				return false;202			}203		} else {204			if ( ! @ssh2_auth_pubkey_file( $this->link, $this->options['username'], $this->options['public_key'] ?? '', $this->options['private_key'] ?? '', $this->options['password'] ?? '' ) ) {205				$this->errors->add(206					'auth',207					sprintf(208						/* translators: %s: Username. */209						__( 'Public and Private keys incorrect for %s' ),210						$this->options['username']211					)212				);213 214				return false;215			}216		}217 218		$this->sftp_link = ssh2_sftp( $this->link );219 220		if ( ! $this->sftp_link ) {221			$this->errors->add(222				'connect',223				sprintf(224					/* translators: %s: hostname:port */225					__( 'Failed to initialize a SFTP subsystem session with the SSH2 Server %s' ),226					$this->options['hostname'] . ':' . $this->options['port']227				)228			);229 230			return false;231		}232 233		return true;234	}