Render personal_sign messages as utf-8 text

Calls to `personal_sign` are now:

- When hex encoded, preserved as hex encoded, but displayed as utf-8 text.
- When not hex encoded, decoded as utf-8 text as hex for signing.
- The messages proposed for signing are displayed as UTF-8 text.
- When the message cannot be rendered as UTF-8 text, it is displayed as hexadecimal.

Fixes #1173

1 files changed, 14 insertions, 8 deletions

diff --git a/app/scripts/lib/personal-message-manager.js b/app/scripts/lib/personal-message-manager.js
index 3b8510767..04dba4a90 100644
--- a/app/scripts/lib/personal-message-manager.js
+++ b/app/scripts/lib/personal-message-manager.js
@@ -2,6 +2,7 @@ const EventEmitter = require('events')
 const ObservableStore = require('obs-store')
 const ethUtil = require('ethereumjs-util')
 const createId = require('./random-id')
+const hexRe = /^[0-9A-Fa-f]+$/g
 
 
 module.exports = class PersonalMessageManager extends EventEmitter{
@@ -24,7 +25,8 @@ module.exports = class PersonalMessageManager extends EventEmitter{
   }
 
   addUnapprovedMessage (msgParams) {
-    msgParams.data = normalizeMsgData(msgParams.data)
+    log.debug(`PersonalMessageManager addUnapprovedMessage: ${JSON.stringify(msgParams)}`)
+    msgParams.data = this.normalizeMsgData(msgParams.data)
     // create txData obj with parameters and meta data
     var time = (new Date()).getTime()
     var msgId = createId()
@@ -106,14 +108,18 @@ module.exports = class PersonalMessageManager extends EventEmitter{
     this.emit('updateBadge')
   }
 
-}
+  normalizeMsgData(data) {
+    try {
+      const stripped = ethUtil.stripHexPrefix(data)
+      if (stripped.match(hexRe)) {
+        return stripped
+      }
+    } catch (e) {
+      log.debug(`Message was not hex encoded, interpreting as utf8.`)
+    }
 
-function normalizeMsgData(data) {
-  if (data.slice(0, 2) === '0x') {
-    // data is already hex
-    return data
-  } else {
-    // data is unicode, convert to hex
     return ethUtil.bufferToHex(new Buffer(data, 'utf8'))
   }
+
 }
+