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 <stdlib.h>
  18 #include <time.h>
  19 #include <clocale>
  20 #include <map>
  21 #include <string>
  22 #include <utility>
  23 #include <vector>
  24
  25 #include <apti18n.h>
  26                                                                         /*}}}*/
  27
  28 using std::string;
  29
  30 APT_PURE string indexRecords::GetDist() const
  31 {
  32    return this->Dist;
  33 }
  34
  35 APT_PURE string indexRecords::GetSuite() const
  36 {
  37    return this->Suite;
  38 }
  39
  40 APT_PURE bool indexRecords::CheckDist(const string MaybeDist) const
  41 {
  42    return (this->Dist == MaybeDist
  43            || this->Suite == MaybeDist);
  44 }
  45
  46 APT_PURE string indexRecords::GetExpectedDist() const
  47 {
  48    return this->ExpectedDist;
  49 }
  50
  51 APT_PURE time_t indexRecords::GetValidUntil() const
  52 {
  53    return this->ValidUntil;
  54 }
  55
  56 APT_PURE const indexRecords::checkSum *indexRecords::Lookup(const string MetaKey)
  57 {
  58    std::map<std::string, indexRecords::checkSum* >::const_iterator sum = Entries.find(MetaKey);
  59    if (sum == Entries.end())
  60       return NULL;
  61    return sum->second;
  62 }
  63
  64 APT_PURE bool indexRecords::Exists(string const &MetaKey) const
  65 {
  66    return Entries.count(MetaKey) == 1;
  67 }
  68
  69 bool indexRecords::Load(const string Filename)                          /*{{{*/
  70 {
  71    FileFd Fd;
  72    if (OpenMaybeClearSignedFile(Filename, Fd) == false)
  73       return false;
  74
  75    pkgTagFile TagFile(&Fd, Fd.Size());
  76    if (_error->PendingError() == true)
  77    {
  78       strprintf(ErrorText, _("Unable to parse Release file %s"),Filename.c_str());
  79       return false;
  80    }
  81
  82    pkgTagSection Section;
  83    const char *Start, *End;
  84    if (TagFile.Step(Section) == false)
  85    {
  86       strprintf(ErrorText, _("No sections in Release file %s"), Filename.c_str());
  87       return false;
  88    }
  89
  90    Suite = Section.FindS("Suite");
  91    Dist = Section.FindS("Codename");
  92
  93    int i;
  94    for (i=0;HashString::SupportedHashes()[i] != NULL; i++)
  95    {
  96       if (!Section.Find(HashString::SupportedHashes()[i], Start, End))
  97          continue;
  98
  99       string Name;
 100       string Hash;
 101       unsigned long long Size;
 102       while (Start < End)
 103       {
 104          if (!parseSumData(Start, End, Name, Hash, Size))
 105             return false;
 106          indexRecords::checkSum *Sum = new indexRecords::checkSum;
 107          Sum->MetaKeyFilename = Name;
 108          Sum->Hash = HashString(HashString::SupportedHashes()[i],Hash);
 109          Sum->Size = Size;
 110          Entries[Name] = Sum;
 111       }
 112       break;
 113    }
 114
 115    if(HashString::SupportedHashes()[i] == NULL)
 116    {
 117       strprintf(ErrorText, _("No Hash entry in Release file %s"), Filename.c_str());
 118       return false;
 119    }
 120
 121    string Label = Section.FindS("Label");
 122    string StrDate = Section.FindS("Date");
 123    string StrValidUntil = Section.FindS("Valid-Until");
 124
 125    // if we have a Valid-Until header in the Release file, use it as default
 126    if (StrValidUntil.empty() == false)
 127    {
 128       if(RFC1123StrToTime(StrValidUntil.c_str(), ValidUntil) == false)
 129       {
 130          strprintf(ErrorText, _("Invalid 'Valid-Until' entry in Release file %s"), Filename.c_str());
 131          return false;
 132       }
 133    }
 134    // get the user settings for this archive and use what expires earlier
 135    int MaxAge = _config->FindI("Acquire::Max-ValidTime", 0);
 136    if (Label.empty() == false)
 137       MaxAge = _config->FindI(("Acquire::Max-ValidTime::" + Label).c_str(), MaxAge);
 138    int MinAge = _config->FindI("Acquire::Min-ValidTime", 0);
 139    if (Label.empty() == false)
 140       MinAge = _config->FindI(("Acquire::Min-ValidTime::" + Label).c_str(), MinAge);
 141
 142    if(MaxAge == 0 &&
 143       (MinAge == 0 || ValidUntil == 0)) // No user settings, use the one from the Release file
 144       return true;
 145
 146    time_t date;
 147    if (RFC1123StrToTime(StrDate.c_str(), date) == false)
 148    {
 149       strprintf(ErrorText, _("Invalid 'Date' entry in Release file %s"), Filename.c_str());
 150       return false;
 151    }
 152
 153    if (MinAge != 0 && ValidUntil != 0) {
 154       time_t const min_date = date + MinAge;
 155       if (ValidUntil < min_date)
 156          ValidUntil = min_date;
 157    }
 158    if (MaxAge != 0) {
 159       time_t const max_date = date + MaxAge;
 160       if (ValidUntil == 0 || ValidUntil > max_date)
 161          ValidUntil = max_date;
 162    }
 163
 164    return true;
 165 }
 166                                                                         /*}}}*/
 167 std::vector<string> indexRecords::MetaKeys()                            /*{{{*/
 168 {
 169    std::vector<std::string> keys;
 170    std::map<string,checkSum *>::iterator I = Entries.begin();
 171    while(I != Entries.end()) {
 172       keys.push_back((*I).first);
 173       ++I;
 174    }
 175    return keys;
 176 }
 177                                                                         /*}}}*/
 178 bool indexRecords::parseSumData(const char *&Start, const char *End,    /*{{{*/
 179                                    string &Name, string &Hash, unsigned long long &Size)
 180 {
 181    Name = "";
 182    Hash = "";
 183    Size = 0;
 184    /* Skip over the first blank */
 185    while ((*Start == '\t' || *Start == ' ' || *Start == '\n' || *Start == '\r')
 186           && Start < End)
 187       Start++;
 188    if (Start >= End)
 189       return false;
 190
 191    /* Move EntryEnd to the end of the first entry (the hash) */
 192    const char *EntryEnd = Start;
 193    while ((*EntryEnd != '\t' && *EntryEnd != ' ')
 194           && EntryEnd < End)
 195       EntryEnd++;
 196    if (EntryEnd == End)
 197       return false;
 198
 199    Hash.append(Start, EntryEnd-Start);
 200
 201    /* Skip over intermediate blanks */
 202    Start = EntryEnd;
 203    while (*Start == '\t' || *Start == ' ')
 204       Start++;
 205    if (Start >= End)
 206       return false;
 207
 208    EntryEnd = Start;
 209    /* Find the end of the second entry (the size) */
 210    while ((*EntryEnd != '\t' && *EntryEnd != ' ' )
 211           && EntryEnd < End)
 212       EntryEnd++;
 213    if (EntryEnd == End)
 214       return false;
 215
 216    Size = strtoull (Start, NULL, 10);
 217
 218    /* Skip over intermediate blanks */
 219    Start = EntryEnd;
 220    while (*Start == '\t' || *Start == ' ')
 221       Start++;
 222    if (Start >= End)
 223       return false;
 224
 225    EntryEnd = Start;
 226    /* Find the end of the third entry (the filename) */
 227    while ((*EntryEnd != '\t' && *EntryEnd != ' ' &&
 228            *EntryEnd != '\n' && *EntryEnd != '\r')
 229           && EntryEnd < End)
 230       EntryEnd++;
 231
 232    Name.append(Start, EntryEnd-Start);
 233    Start = EntryEnd; //prepare for the next round
 234    return true;
 235 }
 236                                                                         /*}}}*/
 237 indexRecords::indexRecords()
 238 {
 239 }
 240
 241 indexRecords::indexRecords(const string ExpectedDist) :
 242    ExpectedDist(ExpectedDist), ValidUntil(0)
 243 {
 244 }