apt-pkg/contrib/sha256.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    SHA256SumValue - Storage for a SHA-256 hash.
   7    SHA256Summation - SHA-256 Secure Hash Algorithm.
   8
   9    This is a C++ interface to a set of SHA256Sum functions, that mirrors
  10    the equivalent MD5 & SHA1 classes.
  11
  12    ##################################################################### */
  13                                                                         /*}}}*/
  14 #ifndef APTPKG_SHA256_H
  15 #define APTPKG_SHA256_H
  16
  17 #ifdef __GNUG__
  18 #pragma interface "apt-pkg/sha256.h"
  19 #endif
  20
  21 #include <string>
  22 #include <algorithm>
  23
  24 using std::string;
  25 using std::min;
  26
  27 class SHA256Summation;
  28
  29 class SHA256SumValue
  30 {
  31    friend class SHA256Summation;
  32    unsigned char Sum[32];
  33
  34    public:
  35
  36    // Accessors
  37    bool operator ==(const SHA256SumValue &rhs) const;
  38    string Value() const;
  39    inline void Value(unsigned char S[32])
  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[32])
  44          {for (int I = 0; I != sizeof(Sum); I++) Sum[I] = S[I];};
  45
  46    SHA256SumValue(string Str);
  47    SHA256SumValue();
  48 };
  49
  50 struct sha256_ctx {
  51     uint32_t count[2];
  52     uint32_t state[8];
  53     uint8_t buf[128];
  54 };
  55
  56 class SHA256Summation
  57 {
  58    struct sha256_ctx Sum;
  59
  60    bool Done;
  61
  62    public:
  63
  64    bool Add(const unsigned char *inbuf,unsigned long inlen);
  65    inline bool Add(const char *Data) {return Add((unsigned char *)Data,strlen(Data));};
  66    bool AddFD(int Fd,unsigned long Size);
  67    inline bool Add(const unsigned char *Beg,const unsigned char *End)
  68                   {return Add(Beg,End-Beg);};
  69    SHA256SumValue Result();
  70
  71    SHA256Summation();
  72 };
  73
  74 #endif