From 9af3fae2d53a34003af405b68923061c01584bc6 Mon Sep 17 00:00:00 2001
From: Michael Krelin <hacker@klever.net>
Date: Mon, 18 Jun 2007 22:02:02 +0000
Subject: reworked zero-padding machinery and added one more instance of zero-padding

---
(limited to 'lib/util.cc')

diff --git a/lib/util.cc b/lib/util.cc
index d9abca7..94f6f53 100644
--- a/lib/util.cc
+++ b/lib/util.cc
@@ -86,9 +86,13 @@ namespace opkele {
 	}
 
 	string bignum_to_base64(const BIGNUM *bn) {
-	    vector<unsigned char> bin(BN_num_bytes(bn));
-	    int l = BN_bn2bin(bn,&(bin.front()));
-	    return encode_base64(&(bin.front()),l);
+	    vector<unsigned char> bin(BN_num_bytes(bn)+1);
+	    unsigned char *binptr = &(bin.front())+1;
+	    int l = BN_bn2bin(bn,binptr);
+	    if(l && (*binptr)&0x80){
+		(*(--binptr)) = 0; ++l;
+	    }
+	    return encode_base64(binptr,l);
 	}
 
 	/*
--
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