Example #1
0
func (c *client) loadState(stateFile *disk.StateFile, pw string) error {
	parsedState, err := stateFile.Read(pw)
	if err != nil {
		return err
	}
	return c.unmarshal(parsedState)
}
Example #2
0
File: client.go Project: nevun/pond
// importTombFile decrypts a file with the given path, using a hex-encoded key
// and loads the client state from the result.
func (c *client) importTombFile(stateFile *disk.StateFile, keyHex, path string) error {
	keyBytes, err := hex.DecodeString(keyHex)
	if err != nil {
		return err
	}

	var key [32]byte
	var nonce [24]byte
	if len(keyBytes) != len(key) {
		return fmt.Errorf("Incorrect key length: %d (want %d)", len(keyBytes), len(key))
	}
	copy(key[:], keyBytes)

	tombBytes, err := ioutil.ReadFile(path)
	if err != nil {
		return err
	}

	plaintext, ok := secretbox.Open(nil, tombBytes, &nonce, &key)
	if !ok {
		return errors.New("Incorrect key")
	}

	c.stateLock, err = stateFile.Lock(true /* create */)
	if c.stateLock == nil && err == nil {
		return errors.New("Output statefile is locked.")
	}
	if err != nil {
		return err
	}

	writerChan := make(chan disk.NewState)
	writerDone := make(chan struct{})
	go stateFile.StartWriter(writerChan, writerDone)

	writerChan <- disk.NewState{State: plaintext}
	close(writerChan)
	<-writerDone

	return nil
}
Example #3
0
func (c *cliClient) createErasureStorage(pw string, stateFile *disk.StateFile) error {
	c.Printf("%s %s\n", termInfoPrefix, tpmIntroMsg)

	present := tpm.Present()
	if !present {
		c.Printf("%s %s\n", termErrPrefix, tpmNotPresentMsg)
	} else {
		c.Printf("%s %s\n", termInfoPrefix, tpmPresentMsg)
	}

ConfigureLoop:
	for present {
		c.term.SetPrompt("Try to configure TPM (y/n)> ")

	PromptLoop:
		for {
			line, err := c.term.ReadLine()
			if err != nil {
				return err
			}
			switch line {
			case "y", "yes", "Yes":
				break PromptLoop
			case "n", "no", "No":
				break ConfigureLoop
			}
		}

		tpm := disk.TPM{
			Log: func(format string, args ...interface{}) {
				msg := fmt.Sprintf(format, args...)
				c.Printf("%s\n", terminalEscape(msg, false))
			},
			Rand: c.rand,
		}

		stateFile.Erasure = &tpm
		if err := stateFile.Create(pw); err != nil {
			c.Printf("%s Setup failed with error: %s\n", termErrPrefix, terminalEscape(err.Error(), false))
		} else {
			c.Printf("%s TPM in use for this statefile\n", termInfoPrefix)
			return nil
		}
	}

	c.Printf("%s TPM will not be used for this statefile\n", termErrPrefix)
	stateFile.Erasure = nil
	return stateFile.Create(pw)
}
Example #4
0
func (c *guiClient) createErasureStorage(pw string, stateFile *disk.StateFile) error {
	var tpmInfo string
	present := tpm.Present()
	if present {
		tpmInfo = tpmPresentMsg
	} else {
		tpmInfo = tpmNotPresentMsg
	}

	ui := VBox{
		widgetBase: widgetBase{padding: 40, expand: true, fill: true, name: "vbox"},
		children: []Widget{
			Label{
				widgetBase: widgetBase{font: "DejaVu Sans 30"},
				text:       "Configure TPM",
			},
			Label{
				widgetBase: widgetBase{
					padding: 20,
					font:    "DejaVu Sans 14",
				},
				text: tpmIntroMsg + "\n\n" + tpmInfo,
				wrap: 600,
			},
			HBox{
				children: []Widget{
					Button{
						widgetBase: widgetBase{
							name:        "tpm",
							insensitive: !present,
						},
						text: "Try to configure TPM",
					},
				},
			},
			TextView{
				widgetBase: widgetBase{name: "log", expand: true, fill: true},
				editable:   false,
			},
			Button{
				widgetBase: widgetBase{name: "continue"},
				text:       "Continue without TPM",
			},
		},
	}

	c.gui.Actions() <- SetBoxContents{name: "body", child: ui}
	c.gui.Actions() <- SetFocus{name: "tpm"}
	c.gui.Actions() <- UIState{uiStateErasureStorage}
	c.gui.Signal()

	var logText string

	tpm := disk.TPM{
		Log: func(format string, args ...interface{}) {
			c.log.Printf(format, args...)
			logText += fmt.Sprintf(format, args...) + "\n"
			c.gui.Actions() <- SetTextView{name: "log", text: logText}
			c.gui.Signal()
		},
		Rand: c.rand,
	}

NextEvent:
	for {
		event, ok := <-c.gui.Events()
		if !ok {
			c.ShutdownAndSuspend()
		}

		click, ok := event.(Click)
		if !ok {
			continue
		}

		switch click.name {
		case "continue":
			stateFile.Erasure = nil
			return stateFile.Create(pw)
		case "tpm":
			if len(logText) > 0 {
				c.gui.Actions() <- SetTextView{name: "log", text: ""}
				c.gui.Signal()
				logText = ""
				time.Sleep(300 * time.Millisecond)
			}

			stateFile.Erasure = &tpm
			c.gui.Actions() <- Sensitive{name: "tpm", sensitive: false}
			c.gui.Actions() <- Sensitive{name: "continue", sensitive: false}
			c.gui.Signal()
			if err := stateFile.Create(pw); err != nil {
				tpm.Log("Setup failed with error: %s", err)
				tpm.Log("You can click the button to try again")
				c.gui.Actions() <- Sensitive{name: "tpm", sensitive: true}
				c.gui.Actions() <- Sensitive{name: "continue", sensitive: true}
				c.gui.Signal()
				continue NextEvent
			}
			return nil
		}
	}

	panic("unreachable")
}
Example #5
0
func (c *client) createErasureStorage(pw string, stateFile *disk.StateFile) error {
	// No NVRAM support on OpenBSD yet.
	return stateFile.Create(pw)
}
Example #6
0
File: cli.go Project: kisom/pond
func (c *cliClient) createErasureStorage(pw string, stateFile *disk.StateFile) error {
	c.Printf("%s %s\n", termErrPrefix, "Erasure storage not yet implemented.")
	stateFile.Erasure = nil
	return stateFile.Create(pw)
}
Example #7
0
func (c *guiClient) createErasureStorage(pw string, stateFile *disk.StateFile) error {
	var tpmInfo string
	present := tpm.Present()
	if present {
		tpmInfo = "Your computer appears to have a TPM chip. Click below to try and use it. You'll need tcsd (the TPM daemon) running."
	} else {
		tpmInfo = "Your computer does not appear to have a TPM chip. Without one, it's possible that someone in physical possession of your computer and passphrase could extract old messages that should have been deleted. Using a computer with a TPM is strongly preferable until alternatives can be implemented."
	}

	ui := VBox{
		widgetBase: widgetBase{padding: 40, expand: true, fill: true, name: "vbox"},
		children: []Widget{
			Label{
				widgetBase: widgetBase{font: "DejaVu Sans 30"},
				text:       "Configure TPM",
			},
			Label{
				widgetBase: widgetBase{
					padding: 20,
					font:    "DejaVu Sans 14",
				},
				text: "It's very difficult to erase information on modern computers so Pond tries to use the TPM chip if possible.\n\n" + tpmInfo,
				wrap: 600,
			},
			HBox{
				children: []Widget{
					Button{
						widgetBase: widgetBase{
							name:        "tpm",
							insensitive: !present,
						},
						text: "Try to configure TPM",
					},
				},
			},
			TextView{
				widgetBase: widgetBase{name: "log", expand: true, fill: true},
				editable:   false,
			},
			Button{
				widgetBase: widgetBase{name: "continue"},
				text:       "Continue without TPM",
			},
		},
	}

	c.gui.Actions() <- SetBoxContents{name: "body", child: ui}
	c.gui.Actions() <- SetFocus{name: "tpm"}
	c.gui.Actions() <- UIState{uiStateErasureStorage}
	c.gui.Signal()

	var logText string

	tpm := disk.TPM{
		Log: func(format string, args ...interface{}) {
			c.log.Printf(format, args...)
			logText += fmt.Sprintf(format, args...) + "\n"
			c.gui.Actions() <- SetTextView{name: "log", text: logText}
			c.gui.Signal()
		},
		Rand: c.rand,
	}

NextEvent:
	for {
		event, ok := <-c.gui.Events()
		if !ok {
			c.ShutdownAndSuspend()
		}

		click, ok := event.(Click)
		if !ok {
			continue
		}

		switch click.name {
		case "continue":
			stateFile.Erasure = nil
			return stateFile.Create(pw)
		case "tpm":
			if len(logText) > 0 {
				c.gui.Actions() <- SetTextView{name: "log", text: ""}
				c.gui.Signal()
				logText = ""
				time.Sleep(300 * time.Millisecond)
			}

			stateFile.Erasure = &tpm
			c.gui.Actions() <- Sensitive{name: "tpm", sensitive: false}
			c.gui.Actions() <- Sensitive{name: "continue", sensitive: false}
			c.gui.Signal()
			if err := stateFile.Create(pw); err != nil {
				tpm.Log("Setup failed with error: %s", err)
				tpm.Log("You can click the button to try again")
				c.gui.Actions() <- Sensitive{name: "tpm", sensitive: true}
				c.gui.Actions() <- Sensitive{name: "continue", sensitive: true}
				c.gui.Signal()
				continue NextEvent
			}
			return nil
		}
	}

	panic("unreachable")
}
Example #8
0
func (c *client) createErasureStorage(pw string, stateFile *disk.StateFile) error {
	return stateFile.Create(pw)
}