1 files changed, 71 insertions, 0 deletions
diff --git a/apt-pkg/contrib/sha256.h b/apt-pkg/contrib/sha256.h
new file mode 100644
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+++ b/apt-pkg/contrib/sha256.h
@@ -0,0 +1,71 @@
+// -*- mode: cpp; mode: fold -*-
+// Description                                                          /*{{{*/
+// $Id: sha1.h,v 1.3 2001/05/07 05:05:47 jgg Exp $
+/* ######################################################################
+
+   SHA256SumValue - Storage for a SHA-256 hash.
+   SHA256Summation - SHA-256 Secure Hash Algorithm.
+   
+   This is a C++ interface to a set of SHA256Sum functions, that mirrors
+   the equivalent MD5 & SHA1 classes. 
+
+   ##################################################################### */
+                                                                        /*}}}*/
+#ifndef APTPKG_SHA256_H
+#define APTPKG_SHA256_H
+
+#include <string>
+#include <cstring>
+#include <algorithm>
+
+using std::string;
+using std::min;
+
+class SHA256Summation;
+
+class SHA256SumValue
+{
+   friend class SHA256Summation;
+   unsigned char Sum[32];
+   
+   public:
+
+   // Accessors
+   bool operator ==(const SHA256SumValue &rhs) const; 
+   string Value() const;
+   inline void Value(unsigned char S[32])
+         {for (int I = 0; I != sizeof(Sum); I++) S[I] = Sum[I];};
+   inline operator string() const {return Value();};
+   bool Set(string Str);
+   inline void Set(unsigned char S[32]) 
+         {for (int I = 0; I != sizeof(Sum); I++) Sum[I] = S[I];};
+
+   SHA256SumValue(string Str);
+   SHA256SumValue();
+};
+
+struct sha256_ctx {
+    uint32_t count[2];
+    uint32_t state[8];
+    uint8_t buf[128];
+};
+
+class SHA256Summation
+{
+   struct sha256_ctx Sum;
+
+   bool Done;
+
+   public:
+
+   bool Add(const unsigned char *inbuf,unsigned long inlen);
+   inline bool Add(const char *Data) {return Add((unsigned char *)Data,strlen(Data));};
+   bool AddFD(int Fd,unsigned long Size);
+   inline bool Add(const unsigned char *Beg,const unsigned char *End) 
+                  {return Add(Beg,End-Beg);};
+   SHA256SumValue Result();
+   
+   SHA256Summation();
+};
+
+#endif