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/sha2.h>
  20
  21 #include <algorithm>
  22 #include <vector>
  23 #include <cstring>
  24
  25 // helper class that contains hash function name
  26 // and hash
  27 class HashString
  28 {
  29  protected:
  30    std::string Type;
  31    std::string Hash;
  32    static const char * _SupportedHashes[10];
  33
  34  public:
  35    HashString(std::string Type, std::string Hash);
  36    HashString(std::string StringedHashString);  // init from str as "type:hash"
  37    HashString();
  38
  39    // get hash type used
  40    std::string HashType() { return Type; };
  41
  42    // verify the given filename against the currently loaded hash
  43    bool VerifyFile(std::string filename) const;
  44
  45    // helper
  46    std::string toStr() const;                    // convert to str as "type:hash"
  47    bool empty() const;
  48
  49    // return the list of hashes we support
  50    static const char** SupportedHashes();
  51 };
  52
  53 class Hashes
  54 {
  55    public:
  56
  57    MD5Summation MD5;
  58    SHA1Summation SHA1;
  59    SHA256Summation SHA256;
  60    SHA512Summation SHA512;
  61
  62    inline bool Add(const unsigned char *Data,unsigned long long Size)
  63    {
  64       return MD5.Add(Data,Size) && SHA1.Add(Data,Size) && SHA256.Add(Data,Size) && SHA512.Add(Data,Size);
  65    };
  66    inline bool Add(const char *Data) {return Add((unsigned char *)Data,strlen(Data));};
  67    inline bool AddFD(int const Fd,unsigned long long Size = 0)
  68    { return AddFD(Fd, Size, true, true, true, true); };
  69    bool AddFD(int const Fd, unsigned long long Size, bool const addMD5,
  70               bool const addSHA1, bool const addSHA256, bool const addSHA512);
  71    inline bool Add(const unsigned char *Beg,const unsigned char *End)
  72                   {return Add(Beg,End-Beg);};
  73 };
  74
  75 #endif