added unsafe and safe events instead of console logging when a checksum is tampered with

frontend/src/fileReceiver.js

@@ -91,12 +91,12 @@ class FileReceiver extends EventEmitter {
         this.emit('hashing', false);
         const integrity = new Uint8Array(calculatedHash).toString() === proposedHash.toString();
         if (!integrity) {
+          this.emit('unsafe', true)
           return new Promise((resolve, reject) => {
-            console.log('This file has been tampered with.')
             reject();
           })
-        }
-        
+        } else {
+          this.emit('safe', true);
           return Promise.all([
             new Promise((resolve, reject) => {
               resolve(decrypted);
@@ -105,6 +105,7 @@ class FileReceiver extends EventEmitter {
               resolve(fname);
             })
           ]);
+        }
       })
     })
   }

test/frontend/frontend.test.js

@@ -235,6 +235,10 @@ describe('File Receiver', function() {
       testDecrypting = isStillDecrypting;
     });
 
+    fr.on('safe', isSafe => {
+      assert(isSafe);
+    })
+
     return fr.download().then(([decrypted, name]) => {
       assert(decrypted);
       assert(name);
@@ -256,6 +260,10 @@ describe('File Receiver', function() {
       testHashing = isStillHashing;
     });
 
+    fr.on('safe', isSafe => {
+      assert(isSafe);
+    })
+
     return fr.download().then(([decrypted, name]) => {
       assert(decrypted);
       assert(name);
@@ -305,6 +313,10 @@ describe('File Receiver', function() {
         const fr = new FileReceiver();
         location.hash = secretKey;
 
+        fr.on('unsafe', isUnsafe => {
+          assert(isUnsafe)
+        })
+
         fr.download().then(() => {
           assert.fail();
           done();