From 022f1665aa238ae73e37afa94e68abb65534e50f Mon Sep 17 00:00:00 2001
From: "Andreas C. Osowski" <andreas@osowski.de>
Date: Sun, 5 Nov 2017 23:55:00 +0100
Subject: [PATCH] signing: bugfix for key generation for seeds >81 trytes

---
 jota/src/main/java/jota/utils/Signing.java |  4 ++--
 jota/src/test/java/jota/SigningTest.java   | 13 +++++++++++++
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/jota/src/main/java/jota/utils/Signing.java b/jota/src/main/java/jota/utils/Signing.java
index d54a6c6..fc260eb 100644
--- a/jota/src/main/java/jota/utils/Signing.java
+++ b/jota/src/main/java/jota/utils/Signing.java
@@ -39,7 +39,7 @@ public class Signing {
      * @throws InvalidSecurityLevelException is thrown when the specified security level is not valid.
      */
     public int[] key(final int[] inSeed, final int index, int security) throws InvalidSecurityLevelException {
-        if (security < 1 || security > 3) {
+        if (security < 1) {
             throw new InvalidSecurityLevelException();
         }
 
@@ -70,7 +70,7 @@ public class Signing {
         while (security-- > 0) {
             for (int i = 0; i < 27; i++) {
                 curl.squeeze(key, offset, HASH_LENGTH);
-                offset += seed.length;
+                offset += HASH_LENGTH;
             }
         }
         return key;
diff --git a/jota/src/test/java/jota/SigningTest.java b/jota/src/test/java/jota/SigningTest.java
index 34833c8..c2ec311 100644
--- a/jota/src/test/java/jota/SigningTest.java
+++ b/jota/src/test/java/jota/SigningTest.java
@@ -3,6 +3,8 @@ package jota;
 import jota.error.InvalidAddressException;
 import jota.error.InvalidSecurityLevelException;
 import jota.model.Bundle;
+import jota.pow.ICurl;
+import jota.pow.SpongeFactory;
 import jota.utils.*;
 import org.junit.Test;
 
@@ -28,6 +30,17 @@ public class SigningTest {
         assertEquals(SIXTH_ADDR, IotaAPIUtils.newAddress(TEST_SEED, 2, 5, true, null));
     }
 
+    @Test
+    public void testLongSeedKeyGeneration() throws InvalidSecurityLevelException {
+        ICurl curl = SpongeFactory.create(SpongeFactory.Mode.KERL);
+        Signing signing = new Signing(curl);
+        String seed = "EV9QRJFJZVFNLYUFXWKXMCRRPNAZYQVEYB9VEPUHQNXJCWKZFVUCTQJFCUAMXAHMMIUQUJDG9UGGQBPIY";
+
+        int[] key1 = signing.key(Converter.trits(seed), 0, 1);
+        int[] key2 = signing.key(Converter.trits(seed+seed), 0, 1);
+        int[] key3 = signing.key(Converter.trits(seed+seed+seed), 0, 1);
+    }
+
     @Test
     public void testSigning() throws InvalidAddressException, InvalidSecurityLevelException {
         // we can sign any hash, so for convenience we will sign the first