Initial UX, creation of encrypted note files

.gitignore

@@ -1,3 +1,3 @@
-fonts/
-screenshot-*.png
-map-*.json
+notes/
+./dethnote
+./dethnote.exe

Makefile

@@ -21,7 +21,7 @@ build:
 # `make run` to run it in debug mode.
 .PHONY: run
 run:
-	go run main.go -debug
+	./go-reload main.go -debug
 
 # `make test` to run unit tests.
 .PHONY: test

go-reload

@@ -0,0 +1,95 @@
+#!/bin/bash
+# Credit from: https://github.com/alexedwards/go-reload/tree/aabe19d0a9935d1238763a4a35e71787854cd5f5
+
+####################################################
+# @kirsle's custom changes from upstream are below #
+####################################################
+
+function die() {
+    echo >&2 $1
+    exit 1
+}
+
+# Before we crash and burn, make sure necessary programs are installed!
+command -v inotifywait || die "I need the inotifywait command (apt install inotify-tools)"
+
+################################
+# end @kirsle's custom changes #
+################################
+
+function monitor() {
+  if [ "$2" = "true" ];  then
+    # Watch all files in the specified directory
+    # Call the restart function when they are saved
+    inotifywait -q -m -r -e close_write -e moved_to $1 |
+    while read line; do
+      restart
+    done
+  else
+    # Watch all *.go files in the specified directory
+    # Call the restart function when they are saved
+    inotifywait -q -m -r -e close_write -e moved_to --exclude '[^g][^o]$' $1 |
+    while read line; do
+      restart
+    done
+  fi
+}
+
+# Terminate and rerun the main Go program
+function restart {
+  if [ "$(pidof $PROCESS_NAME)" ]; then
+    killall -q -w -9 $PROCESS_NAME
+  fi
+  echo ">> Reloading..."
+  eval "go run $ARGS &"
+}
+
+# Make sure all background processes get terminated
+function close {
+  killall -q -w -9 inotifywait
+  exit 0
+}
+
+trap close INT
+echo "== Go-reload"
+
+WATCH_ALL=false
+while getopts ":a" opt; do
+  case $opt in
+    a)
+      WATCH_ALL=true
+      ;;
+    \?)
+      echo "Invalid option: -$OPTARG" >&2
+      exit 0
+      ;;
+  esac
+done
+
+shift "$((OPTIND - 1))"
+
+FILE_NAME=$(basename $1)
+PROCESS_NAME=${FILE_NAME%%.*}
+
+ARGS=$@
+
+# Start the main Go program
+echo ">> Watching directories, CTRL+C to stop"
+eval "go run $ARGS &"
+
+# Monitor all /src directories on the GOPATH
+OIFS="$IFS"
+IFS=':'
+for path in $GOPATH
+do
+  monitor $path/src $WATCH_ALL &
+done
+IFS="$OIFS"
+
+# If the current working directory isn't on the GOPATH, monitor it too
+if [[ $PWD != "$GOPATH/"* ]]
+then
+  monitor $PWD $WATCH_ALL
+fi
+
+wait

main.go

@@ -30,6 +30,11 @@ var (
 	root        string
 	rootDefault = "./notes"
 
+	// -mailgun-url <url>: mailgun API URL for sending out emails.
+	// -mg <url>           Takes the format "<api_key>@<api_base_url>"
+	//                     Example: "key-a1b23c@https://api.mailgun.net/v3/mg.example.com"
+	mailgunURL string
+
 	// -listen <address>: listen on an HTTP port at this address.
 	// -l <address>
 	listen        string
@@ -56,10 +61,16 @@ func init() {
 	})
 
 	flag.BoolVar(&debug, "debug", false, "Enable debug mode for local dev")
+
 	flag.StringVar(&root, "root", rootDefault, "Directory to store the secure notes on disk")
 	flag.StringVar(&root, "r", rootDefault, "Directory to store the secure notes on disk (shorthand)")
+
 	flag.StringVar(&listen, "listen", listenDefault, "HTTP address to listen on")
 	flag.StringVar(&listen, "l", listenDefault, "HTTP address to listen on (shorthand)")
+
+	flag.StringVar(&mailgunURL, "mailgun-url", "", "Mailgun API URL for sending out emails")
+	flag.StringVar(&mailgunURL, "mg", "", "Mailgun API URL for sending out emails (shorthand)")
+
 	flag.BoolVar(&cmdOpen, "open", false, "Immediately open and print a secure note. The passphrase is provided via CLI arguments.")
 	flag.BoolVar(&cmdDelete, "delete", false, "Immediately delete a secure note. The passphrase is provided via CLI arguments.")
 	flag.Usage = func() {
@@ -99,5 +110,7 @@ func main() {
 	}
 
 	app := dethnote.NewServer(root, debug)
+	app.MailgunURL = mailgunURL
+	app.SetupHTTP()
 	app.Run(listen)
 }

public/test.txt

@@ -0,0 +1 @@
+hello world

public/ui/dethnote.css

@@ -0,0 +1,142 @@
+body {
+    margin: 0;
+    padding: 0;
+    font-family: Arial, Helvetica, sans-serif;
+    font-size: medium;
+    line-height: 1.6rem;
+    color: #000;
+    background-color: #EEE;
+}
+p, fieldset {
+    margin: 0 0 1.6rem 0;
+}
+
+a:link, a:visited {
+    color: #006699;
+    text-decoration: underline;
+}
+a:hover, a:active {
+    color: #0000FF;
+}
+
+h1, h2, h3, h4 {
+    margin: 20px 0;
+}
+h1 {
+    margin-top: 0;
+    font-size: 28pt;
+}
+h2 {
+    font-size: 22pt;
+}
+h3 {
+    font-size: 18pt;
+}
+h4 {
+    font-size: 14pt;
+}
+
+/* Form controls */
+label {
+    display: block;
+    font-weight: bold;
+    margin: 8px 0;
+}
+input, textarea, select {
+    width: 96%;
+    border: 1px solid #006699;
+    border-radius: 4px;
+    padding: 8px;
+    background-color: #FFF;
+    color: #000;
+}
+input, select {
+    max-width: 450px;
+}
+input:focus {
+    border: 1px solid #0099FF;
+    box-shadow: 0px 0px 2px #006699;
+}
+button {
+    border: 1px solid #999;
+    border-radius: 4px;
+    background-color: #EEE;
+    color: #000;
+    padding: 8px;
+}
+button:hover {
+    background-color: #FAFAFA;
+}
+button.primary {
+    background-color: #0099FF;
+    color: #FFF;
+}
+button.primary:hover {
+    background-color: #00CCFF;
+}
+
+ul.unstyled {
+    list-style: none;
+    margin: 20px 0;
+    padding: 0;
+}
+ul.unstyled li {
+    margin: 4px 0;
+}
+
+/** TOP NAV HEADER **/
+header {
+    background-color: #000;
+    display: block;
+}
+header ul {
+    margin: 0 auto;
+    padding: 12px;
+    line-height: 24px;
+    max-width: 950px;
+}
+header ul li {
+    display: inline;
+    padding-right: 20px;
+}
+header a:link, header a:visited {
+    color: #CCC;
+    font-weight: bold;
+    text-decoration: none;
+    font-size: large;
+}
+header a:hover, header a:active {
+    color: #FFF;
+}
+
+/** MAIN CONTENT PANEL **/
+main {
+    margin: 20px auto;
+    max-width: 950px;
+}
+section {
+    margin-bottom: 20px;
+    padding: 14px;
+    background-color: #FFF;
+    border: 1px solid #CCC;
+    border-radius: 8px;
+}
+
+/** UNLOCK FORM **/
+form.unlock-form {
+    max-width: 550px;
+    margin: 0 auto;
+    display: flex;
+    flex-direction: row;
+}
+form.unlock-form input {
+    flex: 8 1 0;
+    border-top-right-radius: 0;
+    border-bottom-right-radius: 0;
+    border-right: 0;
+}
+form.unlock-form button {
+    flex: 1 0 0;
+    border-top-left-radius: 0;
+    border-bottom-left-radius: 0;
+}

src/cookies.go

@@ -0,0 +1,22 @@
+package dethnote
+
+import "net/http"
+
+// SetCookie sets a cookie.
+func (s *Server) SetCookie(w http.ResponseWriter, name, value string) {
+	http.SetCookie(w, &http.Cookie{
+		Name:     name,
+		Value:    value,
+		Path:     "/",
+		HttpOnly: true,
+	})
+}
+
+// GetCookie reads a cookie.
+func (s *Server) GetCookie(r *http.Request, name string) string {
+	cookie, _ := r.Cookie(name)
+	if cookie != nil {
+		return cookie.Value
+	}
+	return ""
+}

src/create_handler.go

@@ -0,0 +1,52 @@
+package dethnote
+
+import (
+	"errors"
+	"net/http"
+	"strconv"
+
+	"git.kirsle.net/apps/dethnote/src/vault"
+)
+
+// int form values...
+func intFormValue(r *http.Request, name string) int {
+	value, _ := strconv.Atoi(r.FormValue(name))
+	return value
+}
+
+// CreateHandler covers the `/create` endpoint.
+func (s *Server) CreateHandler(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		WriteError(w, errors.New("Invalid request method"))
+		return
+	}
+
+	// Parse the form fields.
+	var (
+		email          = r.FormValue("email")
+		timeout        = intFormValue(r, "timeout")
+		message        = r.FormValue("message")
+		passwordLength = intFormValue(r, "length")
+	)
+
+	// Make a message object to hold this for now.
+	m, err := vault.NewMessage(email, timeout, message, passwordLength)
+	if err != nil {
+		WriteError(w, err)
+		return
+	}
+
+	// Begin the creation process.
+	err = m.Create(s.root)
+	if err != nil {
+		WriteError(w, err)
+		return
+	}
+
+	// Store the hash path in the browser's cookies.
+	s.SetCookie(w, "hash_path", vault.HashToFilename(m.PasswordHash))
+
+	// OK! Redirect them to the "confirm your email" page.
+	w.Header().Set("Location", "/verify-email")
+	w.WriteHeader(http.StatusFound)
+}

src/server.go

@@ -9,11 +9,14 @@ import (
 
 // Server is the master struct for the web app.
 type Server struct {
+	// Public configurable fields.
+	MailgunURL string // format is like "key-1a2b3c@https://api.mailgun.net/v3/mg.example.com"
+
 	root  string
 	debug bool
 
-	n *negroni.Negroni
-	r *mux.Router
+	n   *negroni.Negroni
+	mux *mux.Router
 }
 
 // NewServer initializes the server struct.
@@ -27,14 +30,33 @@ func NewServer(root string, debug bool) *Server {
 // SetupHTTP configures the HTTP server.
 func (s *Server) SetupHTTP() {
 	// Set up the router.
+	Log.Debug("Setting up the HTTP router...")
 	r := mux.NewRouter()
-	s.r = r
+	s.mux = r
 
-	n := negroni.Classic()
-	n.UseHandler(r)
+	r.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		if err := s.Template(w, "index.gohtml", nil); err != nil {
+			WriteError(w, err)
+		}
+	})
+	r.HandleFunc("/create", s.CreateHandler)
+	r.HandleFunc("/verify-email", func(w http.ResponseWriter, r *http.Request) {
+		s.Template(w, "verify-email.gohtml", map[string]interface{}{
+			"HashPath": s.GetCookie(r, "hash_path"),
+		})
+	})
+
+	n := negroni.New(
+		negroni.NewRecovery(),
+		negroni.NewLogger(),
+		negroni.NewStatic(http.Dir("./public")),
+	)
+	s.n = n
+	n.UseHandler(s.mux)
 }
 
 // Run the server.
 func (s *Server) Run(addr string) {
-	http.ListenAndServe(addr, s.r)
+	Log.Info("Listening at %s", addr)
+	http.ListenAndServe(addr, s.n)
 }

src/templates.go

@@ -0,0 +1,68 @@
+package dethnote
+
+import (
+	"bytes"
+	"errors"
+	"html/template"
+	"io"
+	"net/http"
+	"os"
+)
+
+var functions template.FuncMap
+
+// IncludeFunc implements the "Include" command for the templates.
+func (s *Server) IncludeFunc(name string, v ...interface{}) template.HTML {
+	buf := bytes.NewBuffer([]byte{})
+	var err error
+	if len(v) > 0 {
+		err = s.Template(buf, name, v[0])
+	} else {
+		err = s.Template(buf, name, nil)
+	}
+
+	if err != nil {
+		return template.HTML("[include error: " + err.Error() + "]")
+	}
+
+	return template.HTML(buf.String())
+}
+
+// Template renders an HTML template for the browser.
+func (s *Server) Template(w io.Writer, name string, v interface{}) error {
+	// Initialize template functions?
+	if functions == nil {
+		functions = template.FuncMap{
+			"Include": s.IncludeFunc,
+		}
+	}
+	// Find the template file locally.
+	filename := "./templates/" + name
+	if _, err := os.Stat(filename); os.IsNotExist(err) {
+		return errors.New("template not found: " + name)
+	}
+
+	t := template.New(name).Funcs(functions)
+	t, err := t.ParseFiles(filename)
+	if err != nil {
+		return err
+	}
+
+	// Write the template into a buffer in case of errors, so we can still
+	// control the outgoing HTTP status code.
+	buf := bytes.NewBuffer([]byte{})
+	err = t.ExecuteTemplate(buf, name, v)
+	if err != nil {
+		return err
+	}
+
+	// Send the HTML result.
+	w.Write(buf.Bytes())
+	return nil
+}
+
+// WriteError sends an error to the user.
+func WriteError(w http.ResponseWriter, err error) {
+	w.WriteHeader(http.StatusInternalServerError)
+	w.Write([]byte(err.Error()))
+}

src/vault/diceware.go

@@ -0,0 +1,37 @@
+package vault
+
+import (
+	"crypto/rand"
+	"errors"
+	"fmt"
+	"math/big"
+	"strings"
+)
+
+// Diceware returns a diceware password with `length` words in it.
+func Diceware(length int) (string, error) {
+	words := []string{}
+	for i := 0; i < length; i++ {
+		// Roll five random dice.
+		rolls := ""
+		for j := 1; j <= DieCount; j++ {
+			roll, _ := rand.Int(rand.Reader, big.NewInt(6))
+			rolls += fmt.Sprintf("%d", roll.Int64()+1)
+		}
+
+		word, err := findWord(rolls)
+		if err != nil {
+			return "", err
+		}
+		words = append(words, word)
+	}
+	return strings.Join(words, " "), nil
+}
+
+// findWord looks up a word based on a dice roll.
+func findWord(roll string) (string, error) {
+	if word, ok := dict[roll]; ok {
+		return word, nil
+	}
+	return "", errors.New("roll pattern not found? this should not happen")
+}

src/vault/jsons.go

@@ -0,0 +1,67 @@
+package vault
+
+import (
+	"bytes"
+	"encoding/json"
+	"os"
+	"path/filepath"
+)
+
+// WriteEncrypted writes data to a fully encrypted file.
+func WriteEncrypted(hash []byte, filename string, data []byte) error {
+	ciphertext, err := Encrypt(hash, data)
+	if err != nil {
+		return err
+	}
+
+	// Write it to a file.
+	fh, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer fh.Close()
+
+	fh.Write(ciphertext)
+
+	return nil
+}
+
+// WriteSecureJSON writes an encrypted JSON file to disk using the password.
+func WriteSecureJSON(profile string, hash []byte, v interface{}) error {
+	Log.Info("WriteSecureJSON started")
+
+	// Serialize the metadata to JSON.
+	meta := bytes.NewBuffer([]byte{})
+	encoder := json.NewEncoder(meta)
+	encoder.SetIndent("", "\t")
+	err := encoder.Encode(v)
+	if err != nil {
+		return err
+	}
+
+	// DEBUG: write a plain text JSON file.
+	if true {
+		jsonfile := filepath.Join(profile, "meta.json")
+		Log.Info("Writing plain text JSON file to %s", jsonfile)
+		fh, err := os.Create(jsonfile)
+		if err != nil {
+			return err
+		}
+		defer fh.Close()
+		fh.Write(meta.Bytes())
+	}
+
+	// Write the encrypted metadata file.
+	metafile := filepath.Join(profile, "meta.bin")
+	err = WriteEncrypted(hash, metafile, meta.Bytes())
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// ReadSecureJSON loads an encrypted JSON file from disk using the password.
+func ReadSecureJSON(password string, v interface{}) error {
+	return nil
+}

src/vault/log.go

@@ -0,0 +1,9 @@
+package vault
+
+import "git.kirsle.net/go/log"
+
+var Log *log.Logger
+
+func init() {
+	Log = log.GetLogger("dethnote")
+}

src/vault/models.go

@@ -0,0 +1,102 @@
+package vault
+
+import (
+	"errors"
+	"os"
+	"path/filepath"
+	"time"
+)
+
+// Message is an encrypted file that contains the settings for a secure note,
+// but does not contain the note itself.
+type Message struct {
+	Email    string `json:"email"`    // owner email address
+	Verified bool   `json:"verified"` // verified owner email?
+	Timeout  int    `json:"timeout"`  // hours for the unlock window
+
+	PasswordHash []byte    `json:"hash"` // to verify the password is correct
+	Created      time.Time `json:"created"`
+
+	// ephemeral keys that don't save to disk
+	Password string `json:"-"` // randomly generated Diceware password
+	Message  string `json:"-"` // temporary holding space for the message text
+}
+
+// NewMessage creates a new message.
+func NewMessage(email string, timeout int, message string, passwordLength int) (*Message, error) {
+	password, err := Diceware(passwordLength)
+	if err != nil {
+		return nil, err
+	}
+
+	hash, err := GenerateHash(password)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Message{
+		Email:        email,
+		Timeout:      timeout,
+		Message:      message,
+		Password:     password,
+		PasswordHash: hash,
+	}, nil
+}
+
+// Create the message for the first time, which will trigger a confirmation email
+// to be sent to the message's owner.
+func (m *Message) Create(root string) error {
+	// Make sure defaults are sane.
+	m.Verified = false
+	m.Created = time.Now().UTC()
+	if m.PasswordHash == nil {
+		return errors.New("no hashed password?")
+	}
+
+	// Get the profile folder.
+	profile, err := m.Profile(root)
+	if err != nil {
+		return err
+	}
+
+	// Save the metadata file.
+	WriteSecureJSON(profile, m.PasswordHash, m)
+
+	// Write the message itself, encrypted.
+	textfile := filepath.Join(profile, "message.bin")
+	return WriteEncrypted(m.PasswordHash, textfile, []byte(m.Message))
+}
+
+// Profile returns the directory where this message keeps its files.
+//
+// May panic if it can't create the directory.
+func (m *Message) Profile(root string) (string, error) {
+	// Turn the hash into a directory to store its information.
+	profile := filepath.Join(root, HashToFilename(m.PasswordHash))
+	if _, err := os.Stat(profile); os.IsNotExist(err) {
+		err := os.MkdirAll(profile, 0755)
+		if err != nil {
+			return "", err
+		}
+	}
+	return profile, nil
+}
+
+// Unlocker is a request to open an encrypted message. This document won't
+// exist until the first time the password is entered to unlock a message.
+type Unlocker struct {
+	// Email address of the requester.
+	Email string `json:"email"` // email address of the unlocker
+
+	// Is the request email verified? They must verify before the unlock
+	// process can begin, in case the e-mail server has problems sending
+	// messages, we don't want to start unlocking messages!
+	Verified bool `json:"verified"` // unlocker email address is verified.
+
+	// This is set when the unlock request is first created.
+	Created time.Time `json:"created"`
+
+	// This is set after the email is verified, and is the timeout window
+	// before the message will be decrypted.
+	NotBefore time.Time `json:"notBefore"`
+}

src/vault/security.go

@@ -0,0 +1,76 @@
+package vault
+
+import (
+	"bytes"
+	"crypto/aes"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"strings"
+
+	"golang.org/x/crypto/bcrypt"
+)
+
+// Tunable params for newly generated passwords.
+var (
+	// bcrypt hash cost. The higher, the longer it takes to derive a password.
+	// Helps protect the hashes against brute force attacks.
+	HashCost = 14
+)
+
+// GenerateHash generates a bcrypt hash (slow) of a password, and then returns
+// a SHA-256 sum of the hash.
+func GenerateHash(password string) ([]byte, error) {
+	hash, err := bcrypt.GenerateFromPassword([]byte(password), HashCost)
+	if err != nil {
+		return nil, err
+	}
+
+	// Make it a SHA-256 hash for easy use with AES-256.
+	hasher := sha256.New()
+	_, err = hasher.Write(hash)
+	bin := hasher.Sum(nil)
+	return bin, err
+}
+
+// HashToFilename converts a bcrypt hash into a safe filename on disk.
+//
+// It takes a SHA-256 sum of the hash and then splits it into a short tree
+// for filesystem efficiency.
+func HashToFilename(hash []byte) string {
+	sha := hex.EncodeToString(hash)
+
+	// Split it into a path tree.
+	var (
+		p1 = sha[:2]
+		p2 = sha[2:20]
+		p3 = sha[20:40]
+		p4 = sha[40:]
+	)
+	filename := strings.Join([]string{p1, p2, p3, p4}, "/")
+	return filename
+}
+
+// Encrypt data using AES-256.
+func Encrypt(key []byte, data []byte) ([]byte, error) {
+	// Initialize an AES cipher.
+	encryptor, err := aes.NewCipher(key)
+	if err != nil {
+		return nil, fmt.Errorf("Encrypt: aes.NewCipher error: %s", err)
+	}
+
+	// Pad the plaintext until it's a multiple of the AES block size.
+	buf := bytes.NewBuffer(data)
+	for buf.Len()%aes.BlockSize != 0 {
+		buf.WriteByte(' ')
+	}
+	Log.Info("data: %+v", data)
+	Log.Info("buf: %+v", buf.Bytes())
+
+	// Encode the data to ciphertext.
+	ciphertext := make([]byte, aes.BlockSize+buf.Len())
+	encryptor.Encrypt(ciphertext, buf.Bytes())
+
+	fmt.Printf("cipher: %+v\n", ciphertext)
+	return ciphertext, nil
+}

src/vault/vault.go

@@ -0,0 +1,7 @@
+// Package vault provides the API functions to read and write the encrypted
+// notes for dethnote.
+package vault
+
+func CreateNote(email string, timeout int, message string) {
+
+}

templates/footer.gohtml

@@ -0,0 +1,7 @@
+</main>
+
+<footer>
+</footer>
+
+</body>
+</html>

templates/header.gohtml

@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Dethnote</title>
+    <link rel="stylesheet" type="text/css" href="/ui/dethnote.css">
+</head>
+<body>
+
+<header>
+    <ul>
+        <li><a href="/">Home</a></li>
+        <li><a href="/about">About</a></li>
+        <li><a href="/faq">FAQ</a></li>
+    </ul>
+</header>
+
+<main>

templates/index.gohtml

@@ -0,0 +1,141 @@
+{{ Include "header.gohtml" }}
+    <section>
+        <h1>Dethnote</h1>
+
+        <p>
+            If you've come here because you found a password, enter it below
+            to unlock the message:
+        </p>
+
+        <form class="unlock-form" name="unlocker" method="POST" action="/unlock">
+            <input type="text"
+                name="password"
+                size="20"
+                placeholder="enter the pass phrase here">
+            <button type="submit" class="primary">Go</button>
+        </form>
+    </section>
+
+    <section>
+        <h1>What is this?</h1>
+
+        <p>
+            This service stores encrypted messages that may be unlocked in the event
+            of an emergency, such as an untimely death. For example, you may want to
+            make your password manager available to relatives after you die.
+        </p>
+
+        <p>
+            You can create a Secure Note on this server. It will generate a random,
+            very strong <a href="https://en.wikipedia.org/wiki/Diceware" target="_blank">Diceware</a>
+            password. The password will encrypt your message on the server's hard disk,
+            so that not even the server admin can read the message. The diceware password
+            is strong enough to resist brute force decryption attacks.
+        </p>
+
+        <p>
+            You then write a note and stick it in your wallet. "In case of death,
+            visit &lt;this website&gt; and enter this password:"
+        </p>
+
+        <p>
+            When the password is entered: you are alerted via e-mail that somebody
+            has entered your password. You have 72 hours (or however long you prefer)
+            to respond to the e-mail and cancel the request. If you do not cancel
+            the request, the message will be unlocked to the user who entered the
+            password.
+        </p>
+    </section>
+
+    <section>
+        <h1>Create a Note</h1>
+
+        <p>
+            You may create a note to store on this server. The note will be encrypted
+            using a very strong, randomly generated <a href="https://en.wikipedia.org/wiki/Diceware" target="_blank">Diceware</a>
+            passphrase that the server won't store a copy of.
+        </p>
+
+        <form name="create" method="POST" action="/create">
+            <fieldset>
+                <legend>
+                    <label for="email">Email Address</label>
+                </legend>
+                <p>
+                    You must provide an e-mail address, and you will be sent a confirmation
+                    e-mail to prove control of it.
+                </p>
+                <p>
+                    When your note is unlocked, you will be sent a notification e-mail
+                    with options. If you don't react to the e-mail, the original requester
+                    will be granted access to read the message after a window period
+                    you specify below.
+                </p>
+
+                <input type="email"
+                    name="email"
+                    id="email"
+                    placeholder="name@domain.com"
+                    required>
+            </fieldset>
+
+            <fieldset>
+                <legend>
+                    <label for="timeout">Unlock Timeout Window</label>
+                </legend>
+                <p>
+                    When somebody enters the password to unlock your message, you will
+                    receive a notification e-mail and you may act on it. If you don't
+                    react within this timeout window, the requester will be granted
+                    access to decrypt your message.
+                </p>
+                <select name="timeout" id="timeout">
+                    <option value="0">No unlock timeout</option>
+                    <option value="24">24 hours</option>
+                    <option value="48">48 hours (2 days)</option>
+                    <option value="72" selected>72 hours (3 days)</option>
+                    <option value="168">One week (7 days)</option>
+                    <option value="336">Two weeks (14 days)</option>
+                </select>
+            </fieldset>
+
+            <fieldset>
+                <legend>
+                    <label for="length">Security Settings</label>
+                </legend>
+                <p>
+                    Your message will be encrypted using a strong, randomly generated
+                    <a href="https://en.wikipedia.org/wiki/Diceware" target="_blank">Diceware</a>
+                    password. You may choose how many words will be used; the more the better.
+                </p>
+                <select name="length" id="length">
+                    <option value="6">6 words</option>
+                    <option value="7">7 words</option>
+                    <option value="8">8 words (recommended)</option>
+                    <option value="9">9 words</option>
+                    <option value="10">10 words</option>
+                    <option value="11">11 words</option>
+                    <option value="12">12 words</option>
+                </select>
+            </fieldset>
+
+            <fieldset>
+                <legend>
+                    <label for="message">Message</label>
+                </legend>
+                <textarea
+                    name="message"
+                    cols="80"
+                    rows="20"
+                    placeholder="Secure Message"
+                    required></textarea>
+            </fieldset>
+
+            <p>
+                <button type="submit"
+                    class="primary">Continue &gt;</button>
+            </p>
+        </form>
+    </section>
+
+{{ Include "footer.gohtml" }}

templates/verify-email.gohtml

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+{{ Include "header.gohtml" }}
+    <section>
+        <h1>Verify Your Email</h1>
+
+        <p>
+            You're almost there! Check your e-mail inbox for the confirmation link.
+        </p>
+
+        <p>
+            For the protection of your message, this service <strong>will not</strong>
+            allow the decryption process to begin until you have verified your
+            e-mail address. This is because decryption will send you a notification
+            e-mail to contest the decryption, and so your e-mail address must be
+            verified.
+        </p>
+
+        <p>
+            This server does not store your e-mail address anywhere. Everything about
+            your message, including your e-mail address itself, is heavily encrypted
+            using a randomly generated pass phrase. See the <a href="/faq">FAQ</a>
+            for more details.
+        </p>
+    </section>
+
+    {{ if .HashPath }}
+    <section>
+        <h1>Deletion Link</h1>
+
+        <p>
+            Be sure to save the URL below. Following it will allow you to delete your
+            encrypted message completely, without needing to enter its password.
+        </p>
+
+        <p>
+            <input type="text"
+                readonly
+                value="https://example/delete/{{ .HashPath }}">
+        </p>
+    </section>
+    {{ end }}
+{{ Include "footer.gohtml" }}