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-rw-r--r--src/ClientHandle.cpp6
1 files changed, 4 insertions, 2 deletions
diff --git a/src/ClientHandle.cpp b/src/ClientHandle.cpp
index abe9a86f5..662ee7927 100644
--- a/src/ClientHandle.cpp
+++ b/src/ClientHandle.cpp
@@ -241,9 +241,11 @@ AString cClientHandle::GenerateOfflineUUID(const AString & a_Username)
// Generate an md5 checksum, and use it as base for the ID:
unsigned char MD5[16];
md5((const unsigned char *)a_Username.c_str(), a_Username.length(), MD5);
+ MD5[6] &= 0x0f; // Need to trim to 4 bits only...
+ MD5[8] &= 0x0f; // ... otherwise %01x overflows into two chars
return Printf("%02x%02x%02x%02x-%02x%02x-3%01x%02x-8%01x%02x-%02x%02x%02x%02x%02x%02x",
- MD5[0], MD5[1], MD5[2], MD5[3],
- MD5[4], MD5[5], MD5[6], MD5[7],
+ MD5[0], MD5[1], MD5[2], MD5[3],
+ MD5[4], MD5[5], MD5[6], MD5[7],
MD5[8], MD5[9], MD5[10], MD5[11],
MD5[12], MD5[13], MD5[14], MD5[15]
);