From b678bc5e10462177777a34ba41ee226838decd1c Mon Sep 17 00:00:00 2001
From: Nils Maier <maierman@web.de>
Date: Fri, 20 Sep 2013 02:16:23 +0200
Subject: [PATCH] Fix AppleMessageDigestImpl use with large data

---
 src/AppleMessageDigestImpl.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/AppleMessageDigestImpl.cc b/src/AppleMessageDigestImpl.cc
index b3966e32..80ac9e70 100644
--- a/src/AppleMessageDigestImpl.cc
+++ b/src/AppleMessageDigestImpl.cc
@@ -59,10 +59,12 @@ public:
     init_fn(&ctx_);
   }
   virtual void update(const void* data, size_t length) CXX11_OVERRIDE {
+    auto bytes = reinterpret_cast<const char*>(data);
     while (length) {
       CC_LONG l = std::min(length, (size_t)std::numeric_limits<uint32_t>::max());
-      update_fn(&ctx_, data, l);
+      update_fn(&ctx_, bytes, l);
       length -= l;
+      bytes += l;
     }
   }
   virtual void digest(unsigned char* md) CXX11_OVERRIDE {