[fix] cleanup secure with new module

lib/nconf/stores/file.js

@@ -9,6 +9,7 @@ var crypto = require('crypto'),
     fs = require('fs'),
     path = require('path'),
     util = require('util'),
+    Secure = require('secure-keys'),
     formats = require('../formats'),
     Memory = require('./memory').Memory,
     exists = fs.exists || path.exists,
@@ -49,6 +50,12 @@ var File = exports.File = function (options) {
     if (!this.secure.secret) {
       throw new Error('secure.secret option is required');
     }
+
+    this.keys = new Secure({
+      secret: this.secure.secret,
+      alg: this.secure.alg,
+      format: this.format
+    });
   }
 
   if (options.search) {
@@ -166,19 +173,7 @@ File.prototype.stringify = function () {
       self = this;
 
   if (this.secure) {
-    data = Object.keys(data).reduce(function (acc, key) {
-      var value = self.format.stringify(data[key]);
-      acc[key] = {
-        alg: self.secure.alg,
-        value: cipherConvert(value, {
-          alg: self.secure.alg,
-          secret: self.secure.secret,
-          encs: { input: 'utf8', output: 'hex' }
-        })
-      }
-
-      return acc;
-    }, {});
+    data = this.keys.encrypt(data);
   }
 
   return this.format.stringify(data, null, this.spacing);
@@ -197,18 +192,11 @@ File.prototype.parse = function (contents) {
     return parsed;
   }
 
-  return Object.keys(parsed).reduce(function (acc, key) {
-    var decrypted = cipherConvert(parsed[key].value, {
-      alg: parsed[key].alg || self.secure.alg,
-      secret: self.secure.secret,
-      encs: { input: 'hex', output: 'utf8' }
-    });
+  return this.keys.decrypt(parsed);
 
-    acc[key] = self.format.parse(decrypted);
-    return acc;
-  }, {});
 };
 
+
 //
 // ### function search (base)
 // #### @base {string} Base directory (or file) to begin searching for the target file.
@@ -299,15 +287,3 @@ File.prototype.search = function (base) {
 
   return fullpath;
 };
-
-//
-// ### function cipherConvert (contents, opts)
-// Returns the result of the cipher operation
-// on the contents contents.
-//
-function cipherConvert(contents, opts) {
-  var encs = opts.encs;
-  var cipher = crypto.createCipher(opts.alg, opts.secret);
-  return cipher.update(contents, encs.input, encs.output)
-    + cipher.final(encs.output);
-}

package.json

@@ -15,6 +15,7 @@
   "dependencies": {
     "async": "^1.4.0",
     "ini": "^1.3.0",
+    "secure-keys": "^1.0.0",
     "yargs": "^3.19.0"
   },
   "devDependencies": {