From 00045d7cb02b9e7991217aad94c12e717e284ffa Mon Sep 17 00:00:00 2001
From: Tom Hacohen <tom@stosb.com>
Date: Sat, 30 Dec 2017 14:15:11 +0000
Subject: [PATCH] CryptoManager: Add an option to load an already derived key.

---
 src/api/Crypto.ts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/api/Crypto.ts b/src/api/Crypto.ts
index 72ea122..75c8d2c 100644
--- a/src/api/Crypto.ts
+++ b/src/api/Crypto.ts
@@ -39,6 +39,14 @@ export class CryptoManager {
 
   cipherWords = 4;
 
+  static fromDerivedKey(key: byte[], version: number = Constants.CURRENT_VERSION) {
+    // FIXME: Cleanup this hack
+    const ret = new CryptoManager('', '', version);
+    ret.key = sjcl.codec.bytes.toBits(key);
+    ret._updateDerivedKeys();
+    return ret;
+  }
+
   constructor(_keyBase64: base64, salt: string, version: number = Constants.CURRENT_VERSION) {
     this.version = version;
     let key = sjcl.codec.base64.toBits(_keyBase64);