apt-pkg/contrib/sha1.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: sha1.h,v 1.3 2001/05/07 05:05:47 jgg Exp $
   4 /* ######################################################################
   5
   6    SHA1SumValue - Storage for a SHA-1 hash.
   7    SHA1Summation - SHA-1 Secure Hash Algorithm.
   8
   9    This is a C++ interface to a set of SHA1Sum functions, that mirrors
  10    the equivalent MD5 classes.
  11
  12    ##################################################################### */
  13                                                                         /*}}}*/
  14 #ifndef APTPKG_SHA1_H
  15 #define APTPKG_SHA1_H
  16
  17 #ifdef __GNUG__
  18 #pragma interface "apt-pkg/sha1.h"
  19 #endif
  20
  21 #include <string>
  22 #include <algorithm>
  23
  24 using std::string;
  25 using std::min;
  26
  27 class SHA1Summation;
  28
  29 class SHA1SumValue
  30 {
  31    friend class SHA1Summation;
  32    unsigned char Sum[20];
  33
  34    public:
  35
  36    // Accessors
  37    bool operator ==(const SHA1SumValue &rhs) const;
  38    string Value() const;
  39    inline void Value(unsigned char S[20])
  40          {for (int I = 0; I != sizeof(Sum); I++) S[I] = Sum[I];};
  41    inline operator string() const {return Value();};
  42    bool Set(string Str);
  43    inline void Set(unsigned char S[20])
  44          {for (int I = 0; I != sizeof(Sum); I++) Sum[I] = S[I];};
  45
  46    SHA1SumValue(string Str);
  47    SHA1SumValue();
  48 };
  49
  50 class SHA1Summation
  51 {
  52    /* assumes 64-bit alignment just in case */
  53    unsigned char Buffer[64] __attribute__((aligned(8)));
  54    unsigned char State[5*4] __attribute__((aligned(8)));
  55    unsigned char Count[2*4] __attribute__((aligned(8)));
  56    bool Done;
  57
  58    public:
  59
  60    bool Add(const unsigned char *inbuf,unsigned long inlen);
  61    inline bool Add(const char *Data) {return Add((unsigned char *)Data,strlen(Data));};
  62    bool AddFD(int Fd,unsigned long Size);
  63    inline bool Add(const unsigned char *Beg,const unsigned char *End)
  64                   {return Add(Beg,End-Beg);};
  65    SHA1SumValue Result();
  66
  67    SHA1Summation();
  68 };
  69
  70 #endif