1 files changed, 43 insertions, 0 deletions
diff --git a/apt-pkg/contrib/sha2.cc b/apt-pkg/contrib/sha2.cc
new file mode 100644
index 000000000..4604d3167
--- /dev/null
+++ b/apt-pkg/contrib/sha2.cc
@@ -0,0 +1,43 @@
+/*
+ * Cryptographic API.							{{{
+ *
+ * SHA-512, as specified in
+ * http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option) 
+ * any later version.
+ *
+ */									/*}}}*/
+
+#ifdef __GNUG__
+#pragma implementation "apt-pkg/sha2.h"
+#endif
+
+#include <apt-pkg/sha2.h>
+#include <apt-pkg/strutl.h>
+
+// SHA2Summation::AddFD - Add content of file into the checksum      /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool SHA2SummationBase::AddFD(int Fd,unsigned long Size){
+   unsigned char Buf[64 * 64];
+   int Res = 0;
+   int ToEOF = (Size == 0);
+   while (Size != 0 || ToEOF)
+   {
+      unsigned n = sizeof(Buf);
+      if (!ToEOF) n = min(Size,(unsigned long)n);
+      Res = read(Fd,Buf,n);
+      if (Res < 0 || (!ToEOF && (unsigned) Res != n)) // error, or short read
+         return false;
+      if (ToEOF && Res == 0) // EOF
+         break;
+      Size -= Res;
+      Add(Buf,Res);
+   }
+   return true;
+}
+                                                                       /*}}}*/
+