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assets/webapps/mobile-wallet.gaiamobile.org/js/secure-element/se_utils.js

@@ -0,0 +1,90 @@
+'use strict';
+
+/* exported SEUtils */
+
+(function(exports) {
+
+  var SEUtils = {
+    byteToHexString: function byteToHexString(uint8arr) {
+      if (!uint8arr) {
+        return '';
+      }
+
+      var hexStr = '';
+      for (var i = 0; i < uint8arr.length; i++) {
+        var hex = (uint8arr[i] & 0xff).toString(16);
+        hex = (hex.length === 1) ? '0' + hex : hex;
+        hexStr += hex;
+      }
+      return hexStr.toUpperCase();
+    },
+
+    hexStringToByte: function hexStringToByte(str) {
+      var a = [];
+      for(var i = 0, len = str.length; i < len; i+=2) {
+        a.push(parseInt(str.substr(i,2),16));
+      }
+      return new Uint8Array(a);
+    },
+
+    byteToASCIIString: function byteToASCIIString(arr) {
+      var str = '';
+
+      var len = arr && arr.length ? arr.length : 0;
+      for(var i = 0; i < len; i++) {
+        str += arr[i] < 0x20 || arr > 0x7E ? '' : String.fromCharCode(arr[i]);
+      }
+
+      return str;
+    },
+
+    joinUint8Arrays: function joinUint8Arrays() {
+      var args = Array.prototype.slice.call(arguments);
+      var length = args.reduce(function(a, b) { return a + b.length; }, 0);
+      var out = new Uint8Array(length);
+
+      args.reduce(function(previousLen, buffer) {
+        out.set(buffer, previousLen);
+        return previousLen + buffer.length;
+      }, 0);
+
+      return out;
+    },
+
+    // no support for multibyte tag and constructed data object
+    parseSimpleTLV: function parseSimpleTLV(data) {
+      if(!data) {
+        return null;
+      }
+
+      var result = {};
+      for(var i = 0, len = data.length; i < len;) {
+        var tag = data[i];
+        var length = data[i+1];
+        var value = data.slice(i+2, i+2 + length);
+        result[tag] = value;
+        i += 2 + length;
+      }
+
+      return result;
+    },
+
+    promises: {
+      whilePromise: function(condition, action, init) {
+        return new Promise((resolve, reject) => {
+          var loop = (value) => {
+            if (condition(value)) {
+              return resolve(value);
+            }
+
+            return action(value).then(loop).catch(reject);
+          };
+          loop(init);
+        });
+      },
+    },
+  };
+
+  exports.SEUtils = SEUtils;
+}((typeof exports === 'undefined') ? window : exports));
+