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 #include <string>
  18 #include <cstring>
  19 #include <algorithm>
  20
  21 using std::string;
  22 using std::min;
  23
  24 class SHA1Summation;
  25
  26 class SHA1SumValue
  27 {
  28    friend class SHA1Summation;
  29    unsigned char Sum[20];
  30
  31    public:
  32
  33    // Accessors
  34    bool operator ==(const SHA1SumValue &rhs) const;
  35    string Value() const;
  36    inline void Value(unsigned char S[20])
  37          {for (int I = 0; I != sizeof(Sum); I++) S[I] = Sum[I];};
  38    inline operator string() const {return Value();};
  39    bool Set(string Str);
  40    inline void Set(unsigned char S[20])
  41          {for (int I = 0; I != sizeof(Sum); I++) Sum[I] = S[I];};
  42
  43    SHA1SumValue(string Str);
  44    SHA1SumValue();
  45 };
  46
  47 class SHA1Summation
  48 {
  49    /* assumes 64-bit alignment just in case */
  50    unsigned char Buffer[64] __attribute__((aligned(8)));
  51    unsigned char State[5*4] __attribute__((aligned(8)));
  52    unsigned char Count[2*4] __attribute__((aligned(8)));
  53    bool Done;
  54
  55    public:
  56
  57    bool Add(const unsigned char *inbuf,unsigned long inlen);
  58    inline bool Add(const char *Data) {return Add((unsigned char *)Data,strlen(Data));};
  59    bool AddFD(int Fd,unsigned long Size);
  60    inline bool Add(const unsigned char *Beg,const unsigned char *End)
  61                   {return Add(Beg,End-Beg);};
  62    SHA1SumValue Result();
  63
  64    SHA1Summation();
  65 };
  66
  67 #endif