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
  26 #ifndef APT_8_CLEANER_HEADERS
  27 using std::min;
  28 using std::vector;
  29 #endif
  30
  31 // helper class that contains hash function name
  32 // and hash
  33 class HashString
  34 {
  35  protected:
  36    std::string Type;
  37    std::string Hash;
  38    static const char * _SupportedHashes[10];
  39
  40  public:
  41    HashString(std::string Type, std::string Hash);
  42    HashString(std::string StringedHashString);  // init from str as "type:hash"
  43    HashString();
  44
  45    // get hash type used
  46    std::string HashType() { return Type; };
  47
  48    // verify the given filename against the currently loaded hash
  49    bool VerifyFile(std::string filename) const;
  50
  51    // helper
  52    std::string toStr() const;                    // convert to str as "type:hash"
  53    bool empty() const;
  54
  55    // return the list of hashes we support
  56    static const char** SupportedHashes();
  57 };
  58
  59 class Hashes
  60 {
  61    public:
  62
  63    MD5Summation MD5;
  64    SHA1Summation SHA1;
  65    SHA256Summation SHA256;
  66    SHA512Summation SHA512;
  67
  68    inline bool Add(const unsigned char *Data,unsigned long long Size)
  69    {
  70       return MD5.Add(Data,Size) && SHA1.Add(Data,Size) && SHA256.Add(Data,Size) && SHA512.Add(Data,Size);
  71    };
  72    inline bool Add(const char *Data) {return Add((unsigned char *)Data,strlen(Data));};
  73    inline bool AddFD(int const Fd,unsigned long long Size = 0)
  74    { return AddFD(Fd, Size, true, true, true, true); };
  75    bool AddFD(int const Fd, unsigned long long Size, bool const addMD5,
  76               bool const addSHA1, bool const addSHA256, bool const addSHA512);
  77    inline bool Add(const unsigned char *Beg,const unsigned char *End)
  78                   {return Add(Beg,End-Beg);};
  79 };
  80
  81 #endif