apt-pkg/indexrecords.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: indexrecords.cc,v 1.1.2.4 2003/12/30 02:11:43 mdz Exp $
   4                                                                         /*}}}*/
   5 // Include Files                                                        /*{{{*/
   6 #include<config.h>
   7
   8 #include <apt-pkg/indexrecords.h>
   9 #include <apt-pkg/tagfile.h>
  10 #include <apt-pkg/error.h>
  11 #include <apt-pkg/strutl.h>
  12 #include <apt-pkg/configuration.h>
  13 #include <apt-pkg/fileutl.h>
  14 #include <apt-pkg/hashes.h>
  15 #include <apt-pkg/gpgv.h>
  16
  17 #include <sys/stat.h>
  18 #include <clocale>
  19
  20 #include <apti18n.h>
  21                                                                         /*}}}*/
  22
  23 using std::string;
  24
  25 string indexRecords::GetDist() const
  26 {
  27    return this->Dist;
  28 }
  29
  30 bool indexRecords::CheckDist(const string MaybeDist) const
  31 {
  32    return (this->Dist == MaybeDist
  33            || this->Suite == MaybeDist);
  34 }
  35
  36 string indexRecords::GetExpectedDist() const
  37 {
  38    return this->ExpectedDist;
  39 }
  40
  41 time_t indexRecords::GetValidUntil() const
  42 {
  43    return this->ValidUntil;
  44 }
  45
  46 const indexRecords::checkSum *indexRecords::Lookup(const string MetaKey)
  47 {
  48    std::map<std::string, indexRecords::checkSum* >::const_iterator sum = Entries.find(MetaKey);
  49    if (sum == Entries.end())
  50       return NULL;
  51    return sum->second;
  52 }
  53
  54 bool indexRecords::Exists(string const &MetaKey) const
  55 {
  56    return Entries.count(MetaKey) == 1;
  57 }
  58
  59 bool indexRecords::Load(const string Filename)                          /*{{{*/
  60 {
  61    FileFd Fd;
  62    if (OpenMaybeClearSignedFile(Filename, Fd) == false)
  63       return false;
  64
  65    pkgTagFile TagFile(&Fd);
  66    if (_error->PendingError() == true)
  67    {
  68       strprintf(ErrorText, _("Unable to parse Release file %s"),Filename.c_str());
  69       return false;
  70    }
  71
  72    pkgTagSection Section;
  73    const char *Start, *End;
  74    if (TagFile.Step(Section) == false)
  75    {
  76       strprintf(ErrorText, _("No sections in Release file %s"), Filename.c_str());
  77       return false;
  78    }
  79
  80    Suite = Section.FindS("Suite");
  81    Dist = Section.FindS("Codename");
  82
  83    int i;
  84    for (i=0;HashString::SupportedHashes()[i] != NULL; i++)
  85    {
  86       if (!Section.Find(HashString::SupportedHashes()[i], Start, End))
  87          continue;
  88
  89       string Name;
  90       string Hash;
  91       unsigned long long Size;
  92       while (Start < End)
  93       {
  94          if (!parseSumData(Start, End, Name, Hash, Size))
  95             return false;
  96          indexRecords::checkSum *Sum = new indexRecords::checkSum;
  97          Sum->MetaKeyFilename = Name;
  98          Sum->Hash = HashString(HashString::SupportedHashes()[i],Hash);
  99          Sum->Size = Size;
 100          Entries[Name] = Sum;
 101       }
 102       break;
 103    }
 104
 105    if(HashString::SupportedHashes()[i] == NULL)
 106    {
 107       strprintf(ErrorText, _("No Hash entry in Release file %s"), Filename.c_str());
 108       return false;
 109    }
 110
 111    string Label = Section.FindS("Label");
 112    string StrDate = Section.FindS("Date");
 113    string StrValidUntil = Section.FindS("Valid-Until");
 114
 115    // if we have a Valid-Until header in the Release file, use it as default
 116    if (StrValidUntil.empty() == false)
 117    {
 118       if(RFC1123StrToTime(StrValidUntil.c_str(), ValidUntil) == false)
 119       {
 120          strprintf(ErrorText, _("Invalid 'Valid-Until' entry in Release file %s"), Filename.c_str());
 121          return false;
 122       }
 123    }
 124    // get the user settings for this archive and use what expires earlier
 125    int MaxAge = _config->FindI("Acquire::Max-ValidTime", 0);
 126    if (Label.empty() == false)
 127       MaxAge = _config->FindI(string("Acquire::Max-ValidTime::" + Label).c_str(), MaxAge);
 128    int MinAge = _config->FindI("Acquire::Min-ValidTime", 0);
 129    if (Label.empty() == false)
 130       MinAge = _config->FindI(string("Acquire::Min-ValidTime::" + Label).c_str(), MinAge);
 131
 132    if(MaxAge == 0 &&
 133       (MinAge == 0 || ValidUntil == 0)) // No user settings, use the one from the Release file
 134       return true;
 135
 136    time_t date;
 137    if (RFC1123StrToTime(StrDate.c_str(), date) == false)
 138    {
 139       strprintf(ErrorText, _("Invalid 'Date' entry in Release file %s"), Filename.c_str());
 140       return false;
 141    }
 142
 143    if (MinAge != 0 && ValidUntil != 0) {
 144       time_t const min_date = date + MinAge;
 145       if (ValidUntil < min_date)
 146          ValidUntil = min_date;
 147    }
 148    if (MaxAge != 0) {
 149       time_t const max_date = date + MaxAge;
 150       if (ValidUntil == 0 || ValidUntil > max_date)
 151          ValidUntil = max_date;
 152    }
 153
 154    return true;
 155 }
 156                                                                         /*}}}*/
 157 std::vector<string> indexRecords::MetaKeys()                            /*{{{*/
 158 {
 159    std::vector<std::string> keys;
 160    std::map<string,checkSum *>::iterator I = Entries.begin();
 161    while(I != Entries.end()) {
 162       keys.push_back((*I).first);
 163       ++I;
 164    }
 165    return keys;
 166 }
 167                                                                         /*}}}*/
 168 bool indexRecords::parseSumData(const char *&Start, const char *End,    /*{{{*/
 169                                    string &Name, string &Hash, unsigned long long &Size)
 170 {
 171    Name = "";
 172    Hash = "";
 173    Size = 0;
 174    /* Skip over the first blank */
 175    while ((*Start == '\t' || *Start == ' ' || *Start == '\n' || *Start == '\r')
 176           && Start < End)
 177       Start++;
 178    if (Start >= End)
 179       return false;
 180
 181    /* Move EntryEnd to the end of the first entry (the hash) */
 182    const char *EntryEnd = Start;
 183    while ((*EntryEnd != '\t' && *EntryEnd != ' ')
 184           && EntryEnd < End)
 185       EntryEnd++;
 186    if (EntryEnd == End)
 187       return false;
 188
 189    Hash.append(Start, EntryEnd-Start);
 190
 191    /* Skip over intermediate blanks */
 192    Start = EntryEnd;
 193    while (*Start == '\t' || *Start == ' ')
 194       Start++;
 195    if (Start >= End)
 196       return false;
 197
 198    EntryEnd = Start;
 199    /* Find the end of the second entry (the size) */
 200    while ((*EntryEnd != '\t' && *EntryEnd != ' ' )
 201           && EntryEnd < End)
 202       EntryEnd++;
 203    if (EntryEnd == End)
 204       return false;
 205
 206    Size = strtoull (Start, NULL, 10);
 207
 208    /* Skip over intermediate blanks */
 209    Start = EntryEnd;
 210    while (*Start == '\t' || *Start == ' ')
 211       Start++;
 212    if (Start >= End)
 213       return false;
 214
 215    EntryEnd = Start;
 216    /* Find the end of the third entry (the filename) */
 217    while ((*EntryEnd != '\t' && *EntryEnd != ' ' &&
 218            *EntryEnd != '\n' && *EntryEnd != '\r')
 219           && EntryEnd < End)
 220       EntryEnd++;
 221
 222    Name.append(Start, EntryEnd-Start);
 223    Start = EntryEnd; //prepare for the next round
 224    return true;
 225 }
 226                                                                         /*}}}*/
 227 indexRecords::indexRecords()
 228 {
 229 }
 230
 231 indexRecords::indexRecords(const string ExpectedDist) :
 232    ExpectedDist(ExpectedDist), ValidUntil(0)
 233 {
 234 }