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::GetSupportsAcquireByHash() const
  41 {
  42    return this->SupportsAcquireByHash;
  43 }
  44
  45 APT_PURE bool indexRecords::CheckDist(const string MaybeDist) const
  46 {
  47    return (this->Dist == MaybeDist
  48            || this->Suite == MaybeDist);
  49 }
  50
  51 APT_PURE string indexRecords::GetExpectedDist() const
  52 {
  53    return this->ExpectedDist;
  54 }
  55
  56 APT_PURE time_t indexRecords::GetValidUntil() const
  57 {
  58    return this->ValidUntil;
  59 }
  60
  61 APT_PURE indexRecords::checkSum *indexRecords::Lookup(const string MetaKey)
  62 {
  63    std::map<std::string, indexRecords::checkSum* >::const_iterator sum = Entries.find(MetaKey);
  64    if (sum == Entries.end())
  65       return NULL;
  66    return sum->second;
  67 }
  68
  69 APT_PURE bool indexRecords::Exists(string const &MetaKey) const
  70 {
  71    return Entries.count(MetaKey) == 1;
  72 }
  73
  74 bool indexRecords::Load(const string Filename)                          /*{{{*/
  75 {
  76    FileFd Fd;
  77    if (OpenMaybeClearSignedFile(Filename, Fd) == false)
  78       return false;
  79
  80    pkgTagFile TagFile(&Fd, Fd.Size());
  81    if (_error->PendingError() == true)
  82    {
  83       strprintf(ErrorText, _("Unable to parse Release file %s"),Filename.c_str());
  84       return false;
  85    }
  86
  87    pkgTagSection Section;
  88    const char *Start, *End;
  89    if (TagFile.Step(Section) == false)
  90    {
  91       strprintf(ErrorText, _("No sections in Release file %s"), Filename.c_str());
  92       return false;
  93    }
  94    // FIXME: find better tag name
  95    SupportsAcquireByHash = Section.FindB("Acquire-By-Hash", false);
  96
  97    Suite = Section.FindS("Suite");
  98    Dist = Section.FindS("Codename");
  99
 100    bool FoundHashSum = false;
 101    for (int i=0;HashString::SupportedHashes()[i] != NULL; i++)
 102    {
 103       if (!Section.Find(HashString::SupportedHashes()[i], Start, End))
 104          continue;
 105
 106       string Name;
 107       string Hash;
 108       unsigned long long Size;
 109       while (Start < End)
 110       {
 111          if (!parseSumData(Start, End, Name, Hash, Size))
 112             return false;
 113
 114          if (Entries.find(Name) == Entries.end())
 115          {
 116             indexRecords::checkSum *Sum = new indexRecords::checkSum;
 117             Sum->MetaKeyFilename = Name;
 118             Sum->Size = Size;
 119 #if __GNUC__ >= 4
 120        #pragma GCC diagnostic push
 121        #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 122 #endif
 123             Sum->Hash = HashString(HashString::SupportedHashes()[i],Hash);
 124 #if __GNUC__ >= 4
 125        #pragma GCC diagnostic pop
 126 #endif
 127             Entries[Name] = Sum;
 128          }
 129          Entries[Name]->Hashes.push_back(HashString(HashString::SupportedHashes()[i],Hash));
 130          FoundHashSum = true;
 131       }
 132    }
 133
 134    if(FoundHashSum == false)
 135    {
 136       strprintf(ErrorText, _("No Hash entry in Release file %s"), Filename.c_str());
 137       return false;
 138    }
 139
 140    string Label = Section.FindS("Label");
 141    string StrDate = Section.FindS("Date");
 142    string StrValidUntil = Section.FindS("Valid-Until");
 143
 144    // if we have a Valid-Until header in the Release file, use it as default
 145    if (StrValidUntil.empty() == false)
 146    {
 147       if(RFC1123StrToTime(StrValidUntil.c_str(), ValidUntil) == false)
 148       {
 149          strprintf(ErrorText, _("Invalid 'Valid-Until' entry in Release file %s"), Filename.c_str());
 150          return false;
 151       }
 152    }
 153    // get the user settings for this archive and use what expires earlier
 154    int MaxAge = _config->FindI("Acquire::Max-ValidTime", 0);
 155    if (Label.empty() == false)
 156       MaxAge = _config->FindI(("Acquire::Max-ValidTime::" + Label).c_str(), MaxAge);
 157    int MinAge = _config->FindI("Acquire::Min-ValidTime", 0);
 158    if (Label.empty() == false)
 159       MinAge = _config->FindI(("Acquire::Min-ValidTime::" + Label).c_str(), MinAge);
 160
 161    if(MaxAge == 0 &&
 162       (MinAge == 0 || ValidUntil == 0)) // No user settings, use the one from the Release file
 163       return true;
 164
 165    time_t date;
 166    if (RFC1123StrToTime(StrDate.c_str(), date) == false)
 167    {
 168       strprintf(ErrorText, _("Invalid 'Date' entry in Release file %s"), Filename.c_str());
 169       return false;
 170    }
 171
 172    if (MinAge != 0 && ValidUntil != 0) {
 173       time_t const min_date = date + MinAge;
 174       if (ValidUntil < min_date)
 175          ValidUntil = min_date;
 176    }
 177    if (MaxAge != 0) {
 178       time_t const max_date = date + MaxAge;
 179       if (ValidUntil == 0 || ValidUntil > max_date)
 180          ValidUntil = max_date;
 181    }
 182
 183    return true;
 184 }
 185                                                                         /*}}}*/
 186 std::vector<string> indexRecords::MetaKeys()                            /*{{{*/
 187 {
 188    std::vector<std::string> keys;
 189    std::map<string,checkSum *>::iterator I = Entries.begin();
 190    while(I != Entries.end()) {
 191       keys.push_back((*I).first);
 192       ++I;
 193    }
 194    return keys;
 195 }
 196                                                                         /*}}}*/
 197 bool indexRecords::parseSumData(const char *&Start, const char *End,    /*{{{*/
 198                                    string &Name, string &Hash, unsigned long long &Size)
 199 {
 200    Name = "";
 201    Hash = "";
 202    Size = 0;
 203    /* Skip over the first blank */
 204    while ((*Start == '\t' || *Start == ' ' || *Start == '\n' || *Start == '\r')
 205           && Start < End)
 206       Start++;
 207    if (Start >= End)
 208       return false;
 209
 210    /* Move EntryEnd to the end of the first entry (the hash) */
 211    const char *EntryEnd = Start;
 212    while ((*EntryEnd != '\t' && *EntryEnd != ' ')
 213           && EntryEnd < End)
 214       EntryEnd++;
 215    if (EntryEnd == End)
 216       return false;
 217
 218    Hash.append(Start, EntryEnd-Start);
 219
 220    /* Skip over intermediate blanks */
 221    Start = EntryEnd;
 222    while (*Start == '\t' || *Start == ' ')
 223       Start++;
 224    if (Start >= End)
 225       return false;
 226
 227    EntryEnd = Start;
 228    /* Find the end of the second entry (the size) */
 229    while ((*EntryEnd != '\t' && *EntryEnd != ' ' )
 230           && EntryEnd < End)
 231       EntryEnd++;
 232    if (EntryEnd == End)
 233       return false;
 234
 235    Size = strtoull (Start, NULL, 10);
 236
 237    /* Skip over intermediate blanks */
 238    Start = EntryEnd;
 239    while (*Start == '\t' || *Start == ' ')
 240       Start++;
 241    if (Start >= End)
 242       return false;
 243
 244    EntryEnd = Start;
 245    /* Find the end of the third entry (the filename) */
 246    while ((*EntryEnd != '\t' && *EntryEnd != ' ' &&
 247            *EntryEnd != '\n' && *EntryEnd != '\r')
 248           && EntryEnd < End)
 249       EntryEnd++;
 250
 251    Name.append(Start, EntryEnd-Start);
 252    Start = EntryEnd; //prepare for the next round
 253    return true;
 254 }
 255                                                                         /*}}}*/
 256 indexRecords::indexRecords()
 257 {
 258 }
 259
 260 indexRecords::indexRecords(const string ExpectedDist) :
 261    ExpectedDist(ExpectedDist), ValidUntil(0), SupportsAcquireByHash(false)
 262 {
 263 }