diff options
| -rw-r--r-- | apt-inst/contrib/extracttar.cc | 12 | ||||
| -rw-r--r-- | apt-pkg/contrib/strutl.cc | 18 | ||||
| -rw-r--r-- | apt-pkg/contrib/strutl.h | 1 |
3 files changed, 27 insertions, 4 deletions
diff --git a/apt-inst/contrib/extracttar.cc b/apt-inst/contrib/extracttar.cc index 3d2788aaf..1a358d57e 100644 --- a/apt-inst/contrib/extracttar.cc +++ b/apt-inst/contrib/extracttar.cc @@ -195,10 +195,14 @@ bool ExtractTar::Go(pkgDirStream &Stream) // Decode all of the fields pkgDirStream::Item Itm; if (StrToNum(Tar->Mode,Itm.Mode,sizeof(Tar->Mode),8) == false || - StrToNum(Tar->UserID,Itm.UID,sizeof(Tar->UserID),8) == false || - StrToNum(Tar->GroupID,Itm.GID,sizeof(Tar->GroupID),8) == false || - StrToNum(Tar->Size,Itm.Size,sizeof(Tar->Size),8) == false || - StrToNum(Tar->MTime,Itm.MTime,sizeof(Tar->MTime),8) == false || + (Base256ToNum(Tar->UserID,Itm.UID,8) == false && + StrToNum(Tar->UserID,Itm.UID,sizeof(Tar->UserID),8) == false) || + (Base256ToNum(Tar->GroupID,Itm.GID,8) == false && + StrToNum(Tar->GroupID,Itm.GID,sizeof(Tar->GroupID),8) == false) || + (Base256ToNum(Tar->Size,Itm.Size,12) == false && + StrToNum(Tar->Size,Itm.Size,sizeof(Tar->Size),8) == false) || + (Base256ToNum(Tar->MTime,Itm.MTime,12) == false && + StrToNum(Tar->MTime,Itm.MTime,sizeof(Tar->MTime),8) == false) || StrToNum(Tar->Major,Itm.Major,sizeof(Tar->Major),8) == false || StrToNum(Tar->Minor,Itm.Minor,sizeof(Tar->Minor),8) == false) return _error->Error(_("Corrupted archive")); diff --git a/apt-pkg/contrib/strutl.cc b/apt-pkg/contrib/strutl.cc index 987f4c3a4..daf87c87f 100644 --- a/apt-pkg/contrib/strutl.cc +++ b/apt-pkg/contrib/strutl.cc @@ -968,6 +968,24 @@ bool StrToNum(const char *Str,unsigned long &Res,unsigned Len,unsigned Base) return true; } /*}}}*/ +// Base256ToNum - Convert a fixed length binary to a number /*{{{*/ +// --------------------------------------------------------------------- +/* This is used in decoding the 256bit encoded fixed length fields in + tar files */ +bool Base256ToNum(const char *Str,unsigned long &Res,unsigned Len) +{ + int i; + if ((Str[0] & 0x80) == 0) + return false; + else + { + Res = Str[0] & 0x7F; + for(i=1; i<Len; i++) + Res = (Res<<8) + Str[i]; + return true; + } +} + /*}}}*/ // HexDigit - Convert a hex character into an integer /*{{{*/ // --------------------------------------------------------------------- /* Helper for Hex2Num */ diff --git a/apt-pkg/contrib/strutl.h b/apt-pkg/contrib/strutl.h index a457ff047..591c992d0 100644 --- a/apt-pkg/contrib/strutl.h +++ b/apt-pkg/contrib/strutl.h @@ -52,6 +52,7 @@ string LookupTag(const string &Message,const char *Tag,const char *Default = 0); int StringToBool(const string &Text,int Default = -1); bool ReadMessages(int Fd, vector<string> &List); bool StrToNum(const char *Str,unsigned long &Res,unsigned Len,unsigned Base = 0); +bool Base256ToNum(const char *Str,unsigned long &Res,unsigned Len); bool Hex2Num(const string &Str,unsigned char *Num,unsigned int Length); bool TokSplitString(char Tok,char *Input,char **List, unsigned long ListMax); |