SHA-1 hashing algorithm

[apt.git] / apt-pkg / contrib / sha1.h

diff --git a/apt-pkg/contrib/sha1.h b/apt-pkg/contrib/sha1.h
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+// -*- mode: cpp; mode: fold -*-
+// Description                                                         /*{{{*/
+// $Id: sha1.h,v 1.1 2001/03/06 05:03:49 jgg Exp $
+/* ######################################################################
+
+   SHA1SumValue - Storage for a SHA-1 hash.
+   SHA1Summation - SHA-1 Secure Hash Algorithm.
+   
+   This is a C++ interface to a set of SHA1Sum functions, that mirrors
+   the equivalent MD5 classes. 
+
+   ##################################################################### */
+                                                                       /*}}}*/
+#ifndef APTPKG_SHA1_H
+#define APTPKG_SHA1_H
+
+#ifdef __GNUG__
+#pragma interface "apt-pkg/sha1.h"
+#endif 
+
+#include <string>
+
+class SHA1Summation;
+
+class SHA1SumValue
+{
+   friend class SHA1Summation;
+   unsigned char Sum[20];
+   
+   public:
+
+   // Accessors
+   bool operator ==(const SHA1SumValue &rhs) const; 
+   string Value() const;
+   inline void Value(unsigned char S[20])
+         {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[20]) 
+         {for (int I = 0; I != sizeof(Sum); I++) Sum[I] = S[I];};
+
+   SHA1SumValue(string Str);
+   SHA1SumValue();
+};
+
+class SHA1Summation
+{
+   unsigned char Buffer[64];
+   unsigned char State[5*4];
+   unsigned char Count[2*4];
+   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);};
+   SHA1SumValue Result();
+   
+   SHA1Summation();
+};
+
+#endif