Add MD5 hash function

CPP/Common/MD5Reg.cpp

@@ -0,0 +1,40 @@
+// MD5Reg.cpp
+
+#include "StdAfx.h"
+
+#include "../../C/md5.h"
+
+#include "../Common/MyCom.h"
+
+#include "../7zip/Common/RegisterCodec.h"
+
+class CMD5Hasher:
+  public IHasher,
+  public CMyUnknownImp
+{
+  MD5_CTX _ctx;
+  Byte mtDummy[1 << 7];
+  
+public:
+  CMD5Hasher() { MD5_Init(&_ctx); }
+
+  MY_UNKNOWN_IMP1(IHasher)
+  INTERFACE_IHasher(;)
+};
+
+STDMETHODIMP_(void) CMD5Hasher::Init() throw()
+{
+  MD5_Init(&_ctx);
+}
+
+STDMETHODIMP_(void) CMD5Hasher::Update(const void *data, UInt32 size) throw()
+{
+  MD5_Update(&_ctx, (const Byte *)data, size);
+}
+
+STDMETHODIMP_(void) CMD5Hasher::Final(Byte *digest) throw()
+{
+  MD5_Final(&_ctx, digest);
+}
+
+REGISTER_HASHER(CMD5Hasher, 0x205, "MD5", 16)