From d2d5a464a33ac7f31db5cc082a713c794f65f577 Mon Sep 17 00:00:00 2001
From: zzz <zzz@mail.i2p>
Date: Wed, 27 Jan 2016 13:42:58 +0000
Subject: [PATCH] KeyGenerator: Check that dsax is greater than zero

---
 core/java/src/net/i2p/crypto/KeyGenerator.java | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/core/java/src/net/i2p/crypto/KeyGenerator.java b/core/java/src/net/i2p/crypto/KeyGenerator.java
index 6c8b7ec48..957b6120a 100644
--- a/core/java/src/net/i2p/crypto/KeyGenerator.java
+++ b/core/java/src/net/i2p/crypto/KeyGenerator.java
@@ -208,10 +208,10 @@ public final class KeyGenerator {
         SimpleDataStructure[] keys = new SimpleDataStructure[2];
         BigInteger x = null;
 
-        // make sure the random key is less than the DSA q
+        // make sure the random key is less than the DSA q and greater than zero
         do {
             x = new NativeBigInteger(160, _context.random());
-        } while (x.compareTo(CryptoConstants.dsaq) >= 0);
+        } while (x.compareTo(CryptoConstants.dsaq) >= 0 || x.equals(BigInteger.ZERO));
 
         BigInteger y = CryptoConstants.dsag.modPow(x, CryptoConstants.dsap);
         keys[0] = new SigningPublicKey();