apt-pkg/contrib/hashes.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: hashes.h,v 1.2 2001/03/11 05:30:20 jgg Exp $
   4 /* ######################################################################
   5
   6    Hashes - Simple wrapper around the hash functions
   7
   8    This is just used to make building the methods simpler, this is the
   9    only interface required..
  10
  11    ##################################################################### */
  12                                                                         /*}}}*/
  13 #ifndef APTPKG_HASHES_H
  14 #define APTPKG_HASHES_H
  15
  16
  17 #include <apt-pkg/md5.h>
  18 #include <apt-pkg/sha1.h>
  19 #include <apt-pkg/sha256.h>
  20
  21 #include <algorithm>
  22 #include <vector>
  23 #include <cstring>
  24
  25 using std::min;
  26 using std::vector;
  27
  28 // helper class that contains hash function name
  29 // and hash
  30 class HashString
  31 {
  32  protected:
  33    string Type;
  34    string Hash;
  35    static const char * _SupportedHashes[10];
  36
  37  public:
  38    HashString(string Type, string Hash);
  39    HashString(string StringedHashString);  // init from str as "type:hash"
  40    HashString();
  41
  42    // get hash type used
  43    string HashType() { return Type; };
  44
  45    // verify the given filename against the currently loaded hash
  46    bool VerifyFile(string filename) const;
  47
  48    // helper
  49    string toStr() const;                    // convert to str as "type:hash"
  50    bool empty() const;
  51
  52    // return the list of hashes we support
  53    static const char** SupportedHashes();
  54 };
  55
  56 class Hashes
  57 {
  58    public:
  59
  60    MD5Summation MD5;
  61    SHA1Summation SHA1;
  62    SHA256Summation SHA256;
  63
  64    inline bool Add(const unsigned char *Data,unsigned long Size)
  65    {
  66       return MD5.Add(Data,Size) && SHA1.Add(Data,Size) && SHA256.Add(Data,Size);
  67    };
  68    inline bool Add(const char *Data) {return Add((unsigned char *)Data,strlen(Data));};
  69    bool AddFD(int Fd,unsigned long Size);
  70    inline bool Add(const unsigned char *Beg,const unsigned char *End)
  71                   {return Add(Beg,End-Beg);};
  72 };
  73
  74 #endif