move sha512,256 into apt-pkg/sha2.{cc,h}, move gifford implementation to sha2_interna...

[apt.git] / ftparchive / cachedb.cc

diff --git a/ftparchive/cachedb.cc b/ftparchive/cachedb.cc
index b25d61d3b504882fa0ffcd7e709a95cccab238a0..7e4c2e9fec82320baa16ea2739ff6e553dd2412f 100644 (file)
--- a/ftparchive/cachedb.cc
+++ b/ftparchive/cachedb.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/

-// $Id: cachedb.cc,v 1.5 2002/11/22 18:02:08 doogie Exp $
+// $Id: cachedb.cc,v 1.7 2004/05/08 19:41:01 mdz Exp $

 /* ######################################################################
 
    CacheDB
 /* ######################################################################
 
    CacheDB


@@ -10,14 +10,13 @@
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/

-#ifdef __GNUG__
-#pragma implementation "cachedb.h"
-#endif
-

 #include "cachedb.h"
 
 #include "cachedb.h"
 

+#include <apti18n.h>

 #include <apt-pkg/error.h>
 #include <apt-pkg/md5.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/md5.h>

+#include <apt-pkg/sha1.h>
+#include <apt-pkg/sha2.h>

 #include <apt-pkg/strutl.h>
 #include <apt-pkg/configuration.h>
     
 #include <apt-pkg/strutl.h>
 #include <apt-pkg/configuration.h>
     


@@ -27,8 +26,10 @@
 // CacheDB::ReadyDB - Ready the DB2                                    /*{{{*/
 // ---------------------------------------------------------------------
 /* This opens the DB2 file for caching package information */
 // CacheDB::ReadyDB - Ready the DB2                                    /*{{{*/
 // ---------------------------------------------------------------------
 /* This opens the DB2 file for caching package information */

-bool CacheDB::ReadyDB(string DB)
+bool CacheDB::ReadyDB(string const &DB)

 {
 {

+   int err;
+

    ReadOnly = _config->FindB("APT::FTPArchive::ReadOnlyDB",false);
    
    // Close the old DB
    ReadOnly = _config->FindB("APT::FTPArchive::ReadOnlyDB",false);
    
    // Close the old DB


@@ -39,7 +40,7 @@ bool CacheDB::ReadyDB(string DB)
       corrupted DB */
    if (DBFailed() == true)
    {
       corrupted DB */
    if (DBFailed() == true)
    {

-      _error->Warning("DB was corrupted, file renamed to %s.old",DBFile.c_str());
+      _error->Warning(_("DB was corrupted, file renamed to %s.old"),DBFile.c_str());

       rename(DBFile.c_str(),(DBFile+".old").c_str());
    }
    
       rename(DBFile.c_str(),(DBFile+".old").c_str());
    }
    


@@ -49,13 +50,32 @@ bool CacheDB::ReadyDB(string DB)
    
    if (DB.empty())
       return true;
    
    if (DB.empty())
       return true;

-   
-   if ((errno = db_open(DB.c_str(),DB_HASH,
+
+   db_create(&Dbp, NULL, 0);
+   if ((err = Dbp->open(Dbp, NULL, DB.c_str(), NULL, DB_BTREE,

                         (ReadOnly?DB_RDONLY:DB_CREATE),
                         (ReadOnly?DB_RDONLY:DB_CREATE),

-                        0644,0,0,&Dbp)) != 0)
+                        0644)) != 0)

    {
    {

-      Dbp = 0;
-      return _error->Errno("db_open","Unable to open DB2 file %s",DB.c_str());
+      if (err == DB_OLD_VERSION)
+      {
+          _error->Warning(_("DB is old, attempting to upgrade %s"),DBFile.c_str());
+         err = Dbp->upgrade(Dbp, DB.c_str(), 0);
+         if (!err)
+            err = Dbp->open(Dbp, NULL, DB.c_str(), NULL, DB_HASH,
+                            (ReadOnly?DB_RDONLY:DB_CREATE), 0644);
+
+      }
+      // the database format has changed from DB_HASH to DB_BTREE in 
+      // apt 0.6.44
+      if (err == EINVAL)
+      {
+        _error->Error(_("DB format is invalid. If you upgraded from an older version of apt, please remove and re-create the database."));
+      }
+      if (err)
+      {
+          Dbp = 0;
+          return _error->Error(_("Unable to open DB file %s: %s"),DB.c_str(), db_strerror(err));
+      }

    }
    
    DBFile = DB;
    }
    
    DBFile = DB;


@@ -63,48 +83,130 @@ bool CacheDB::ReadyDB(string DB)
    return true;
 }
                                                                        /*}}}*/
    return true;
 }
                                                                        /*}}}*/

-// CacheDB::SetFile - Select a file to be working with                 /*{{{*/
+// CacheDB::OpenFile - Open the file                                   /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool CacheDB::OpenFile()
+{
+       Fd = new FileFd(FileName,FileFd::ReadOnly);
+       if (_error->PendingError() == true)
+       {
+               delete Fd;
+               Fd = NULL;
+               return false;
+       }
+       return true;
+}
+                                                                       /*}}}*/
+// CacheDB::GetFileStat - Get stats from the file                      /*{{{*/
+// ---------------------------------------------------------------------
+/* This gets the size from the database if it's there.  If we need
+ * to look at the file, also get the mtime from the file. */
+bool CacheDB::GetFileStat(bool const &doStat)
+{
+       if ((CurStat.Flags & FlSize) == FlSize && doStat == false)
+       {
+               /* Already worked out the file size */
+       }
+       else
+       {
+               /* Get it from the file. */
+               if (Fd == NULL && OpenFile() == false)
+               {
+                       return false;
+               }
+               // Stat the file
+               struct stat St;
+               if (fstat(Fd->Fd(),&St) != 0)
+               {
+                       return _error->Errno("fstat",
+                               _("Failed to stat %s"),FileName.c_str());
+               }
+               CurStat.FileSize = St.st_size;
+               CurStat.mtime = htonl(St.st_mtime);
+               CurStat.Flags |= FlSize;
+       }
+       return true;
+}
+                                                                       /*}}}*/
+// CacheDB::GetCurStat - Set the CurStat variable.                     /*{{{*/

 // ---------------------------------------------------------------------
 // ---------------------------------------------------------------------

-/* All future actions will be performed against this file */
-bool CacheDB::SetFile(string FileName,struct stat St,FileFd *Fd)
+/* Sets the CurStat variable.  Either to 0 if no database is used
+ * or to the value in the database if one is used */
+bool CacheDB::GetCurStat()

 {
 {

-   delete DebFile;
-   DebFile = 0;
-   this->FileName = FileName;
-   this->Fd = Fd;
-   this->FileStat = St;
-   FileStat = St;   

    memset(&CurStat,0,sizeof(CurStat));
    
    memset(&CurStat,0,sizeof(CurStat));
    

-   Stats.Bytes += St.st_size;
-   Stats.Packages++;
-   
-   if (DBLoaded == false)
-      return true;
+       if (DBLoaded)
+       {
+               /* First see if there is anything about it
+                  in the database */

 
 

+               /* Get the flags (and mtime) */

    InitQuery("st");
    InitQuery("st");

-   

    // Ensure alignment of the returned structure
    Data.data = &CurStat;
    Data.ulen = sizeof(CurStat);
    Data.flags = DB_DBT_USERMEM;
    // Ensure alignment of the returned structure
    Data.data = &CurStat;
    Data.ulen = sizeof(CurStat);
    Data.flags = DB_DBT_USERMEM;

-   // Lookup the stat info and confirm the file is unchanged
-   if (Get() == true)
-   {
-      if (CurStat.mtime != htonl(St.st_mtime))
+               if (Get() == false)

       {
       {

-        CurStat.mtime = htonl(St.st_mtime);

         CurStat.Flags = 0;
         CurStat.Flags = 0;

-        _error->Warning("File date has changed %s",FileName.c_str());

       }      
       }      

+               CurStat.Flags = ntohl(CurStat.Flags);
+               CurStat.FileSize = ntohl(CurStat.FileSize);

    }      
    }      

-   else
+       return true;
+}
+                                                                       /*}}}*/
+// CacheDB::GetFileInfo - Get all the info about the file              /*{{{*/
+// ---------------------------------------------------------------------
+bool CacheDB::GetFileInfo(string const &FileName, bool const &DoControl, bool const &DoContents,
+                               bool const &GenContentsOnly, bool const &DoMD5, bool const &DoSHA1,
+                               bool const &DoSHA256,   bool const &DoSHA512, 
+                          bool const &checkMtime)
+{
+       this->FileName = FileName;
+
+       if (GetCurStat() == false)

    {
    {

-      CurStat.mtime = htonl(St.st_mtime);
-      CurStat.Flags = 0;
+               return false;

    }   
    }   

-   CurStat.Flags = ntohl(CurStat.Flags);

    OldStat = CurStat;
    OldStat = CurStat;

+
+       if (GetFileStat(checkMtime) == false)
+       {
+               delete Fd;
+               Fd = NULL;
+               return false;   
+       }
+
+    /* if mtime changed, update CurStat from disk */
+    if (checkMtime == true && OldStat.mtime != CurStat.mtime)
+        CurStat.Flags = FlSize;
+
+       Stats.Bytes += CurStat.FileSize;
+       Stats.Packages++;
+
+       if ((DoControl && LoadControl() == false)
+               || (DoContents && LoadContents(GenContentsOnly) == false)
+               || (DoMD5 && GetMD5(false) == false)
+               || (DoSHA1 && GetSHA1(false) == false)
+               || (DoSHA256 && GetSHA256(false) == false)
+               || (DoSHA512 && GetSHA512(false) == false)
+           )
+       {
+               delete Fd;
+               Fd = NULL;
+               delete DebFile;
+               DebFile = NULL;
+               return false;   
+       }
+
+       delete Fd;
+       Fd = NULL;
+       delete DebFile;
+       DebFile = NULL;
+

    return true;
 }
                                                                        /*}}}*/
    return true;
 }
                                                                        /*}}}*/


@@ -123,6 +225,10 @@ bool CacheDB::LoadControl()
       CurStat.Flags &= ~FlControl;
    }
    
       CurStat.Flags &= ~FlControl;
    }
    

+   if (Fd == NULL && OpenFile() == false)
+   {
+      return false;
+   }

    // Create a deb instance to read the archive
    if (DebFile == 0)
    {
    // Create a deb instance to read the archive
    if (DebFile == 0)
    {


@@ -136,7 +242,7 @@ bool CacheDB::LoadControl()
       return false;
 
    if (Control.Control == 0)
       return false;
 
    if (Control.Control == 0)

-      return _error->Error("Archive has no control record");
+      return _error->Error(_("Archive has no control record"));

    
    // Write back the control information
    InitQuery("cl");
    
    // Write back the control information
    InitQuery("cl");


@@ -148,7 +254,7 @@ bool CacheDB::LoadControl()
 // CacheDB::LoadContents - Load the File Listing                       /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // CacheDB::LoadContents - Load the File Listing                       /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-bool CacheDB::LoadContents(bool GenOnly)
+bool CacheDB::LoadContents(bool const &GenOnly)

 {
    // Try to read the control information out of the DB.
    if ((CurStat.Flags & FlContents) == FlContents)
 {
    // Try to read the control information out of the DB.
    if ((CurStat.Flags & FlContents) == FlContents)


@@ -167,6 +273,10 @@ bool CacheDB::LoadContents(bool GenOnly)
       CurStat.Flags &= ~FlContents;
    }
    
       CurStat.Flags &= ~FlContents;
    }
    

+   if (Fd == NULL && OpenFile() == false)
+   {
+      return false;
+   }

    // Create a deb instance to read the archive
    if (DebFile == 0)
    {
    // Create a deb instance to read the archive
    if (DebFile == 0)
    {


@@ -185,10 +295,37 @@ bool CacheDB::LoadContents(bool GenOnly)
    return true;
 }
                                                                        /*}}}*/
    return true;
 }
                                                                        /*}}}*/

+
+static string bytes2hex(uint8_t *bytes, size_t length) {
+   char space[65];
+   if (length * 2 > sizeof(space) - 1) length = (sizeof(space) - 1) / 2;
+   for (size_t i = 0; i < length; i++)
+      snprintf(&space[i*2], 3, "%02x", bytes[i]);
+   return string(space);
+}
+
+static inline unsigned char xdig2num(char const &dig) {
+   if (isdigit(dig)) return dig - '0';
+   if ('a' <= dig && dig <= 'f') return dig - 'a' + 10;
+   if ('A' <= dig && dig <= 'F') return dig - 'A' + 10;
+   return 0;
+}
+
+static void hex2bytes(uint8_t *bytes, const char *hex, int length) {
+   while (length-- > 0) {
+      *bytes = 0;
+      if (isxdigit(hex[0]) && isxdigit(hex[1])) {
+         *bytes = xdig2num(hex[0]) * 16 + xdig2num(hex[1]);
+         hex += 2;
+      }
+      bytes++;
+   } 
+}
+

 // CacheDB::GetMD5 - Get the MD5 hash                                  /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // CacheDB::GetMD5 - Get the MD5 hash                                  /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-bool CacheDB::GetMD5(string &MD5Res,bool GenOnly)
+bool CacheDB::GetMD5(bool const &GenOnly)

 {
    // Try to read the control information out of the DB.
    if ((CurStat.Flags & FlMD5) == FlMD5)
 {
    // Try to read the control information out of the DB.
    if ((CurStat.Flags & FlMD5) == FlMD5)


@@ -196,28 +333,119 @@ bool CacheDB::GetMD5(string &MD5Res,bool GenOnly)
       if (GenOnly == true)
         return true;
       
       if (GenOnly == true)
         return true;
       

-      InitQuery("m5");
-      if (Get() == true)
-      {
-        MD5Res = string((char *)Data.data,Data.size);
+      MD5Res = bytes2hex(CurStat.MD5, sizeof(CurStat.MD5));

         return true;
       }
         return true;
       }

-      CurStat.Flags &= ~FlMD5;
-   }

    
    

-   Stats.MD5Bytes += FileStat.st_size;
+   Stats.MD5Bytes += CurStat.FileSize;

         
         

+   if (Fd == NULL && OpenFile() == false)
+   {
+      return false;
+   }

    MD5Summation MD5;
    MD5Summation MD5;

-   if (Fd->Seek(0) == false || MD5.AddFD(Fd->Fd(),FileStat.st_size) == false)
+   if (Fd->Seek(0) == false || MD5.AddFD(Fd->Fd(),CurStat.FileSize) == false)

       return false;
    
    MD5Res = MD5.Result();
       return false;
    
    MD5Res = MD5.Result();

-   InitQuery("m5");
-   if (Put(MD5Res.c_str(),MD5Res.length()) == true)
+   hex2bytes(CurStat.MD5, MD5Res.data(), sizeof(CurStat.MD5));

       CurStat.Flags |= FlMD5;
    return true;
 }
                                                                        /*}}}*/
       CurStat.Flags |= FlMD5;
    return true;
 }
                                                                        /*}}}*/

+// CacheDB::GetSHA1 - Get the SHA1 hash                                        /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool CacheDB::GetSHA1(bool const &GenOnly)
+{
+   // Try to read the control information out of the DB.
+   if ((CurStat.Flags & FlSHA1) == FlSHA1)
+   {
+      if (GenOnly == true)
+        return true;
+
+      SHA1Res = bytes2hex(CurStat.SHA1, sizeof(CurStat.SHA1));
+      return true;
+   }
+   
+   Stats.SHA1Bytes += CurStat.FileSize;
+        
+   if (Fd == NULL && OpenFile() == false)
+   {
+      return false;
+   }
+   SHA1Summation SHA1;
+   if (Fd->Seek(0) == false || SHA1.AddFD(Fd->Fd(),CurStat.FileSize) == false)
+      return false;
+   
+   SHA1Res = SHA1.Result();
+   hex2bytes(CurStat.SHA1, SHA1Res.data(), sizeof(CurStat.SHA1));
+   CurStat.Flags |= FlSHA1;
+   return true;
+}
+                                                                       /*}}}*/
+// CacheDB::GetSHA256 - Get the SHA256 hash                            /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool CacheDB::GetSHA256(bool const &GenOnly)
+{
+   // Try to read the control information out of the DB.
+   if ((CurStat.Flags & FlSHA256) == FlSHA256)
+   {
+      if (GenOnly == true)
+        return true;
+
+      SHA256Res = bytes2hex(CurStat.SHA256, sizeof(CurStat.SHA256));
+      return true;
+   }
+   
+   Stats.SHA256Bytes += CurStat.FileSize;
+        
+   if (Fd == NULL && OpenFile() == false)
+   {
+      return false;
+   }
+   SHA256Summation SHA256;
+   if (Fd->Seek(0) == false || SHA256.AddFD(Fd->Fd(),CurStat.FileSize) == false)
+      return false;
+   
+   SHA256Res = SHA256.Result();
+   hex2bytes(CurStat.SHA256, SHA256Res.data(), sizeof(CurStat.SHA256));
+   CurStat.Flags |= FlSHA256;
+   return true;
+}
+                                                                       /*}}}*/
+// CacheDB::GetSHA256 - Get the SHA256 hash                            /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool CacheDB::GetSHA512(bool const &GenOnly)
+{
+   // Try to read the control information out of the DB.
+   if ((CurStat.Flags & FlSHA512) == FlSHA512)
+   {
+      if (GenOnly == true)
+        return true;
+
+      SHA512Res = bytes2hex(CurStat.SHA512, sizeof(CurStat.SHA512));
+      return true;
+   }
+   
+   Stats.SHA512Bytes += CurStat.FileSize;
+        
+   if (Fd == NULL && OpenFile() == false)
+   {
+      return false;
+   }
+   SHA512Summation SHA512;
+   if (Fd->Seek(0) == false || SHA512.AddFD(Fd->Fd(),CurStat.FileSize) == false)
+      return false;
+   
+   SHA512Res = SHA512.Result();
+   hex2bytes(CurStat.SHA512, SHA512Res.data(), sizeof(CurStat.SHA512));
+   CurStat.Flags |= FlSHA512;
+   return true;
+}
+                                                                       /*}}}*/

 // CacheDB::Finish - Write back the cache structure                    /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // CacheDB::Finish - Write back the cache structure                    /*{{{*/
 // ---------------------------------------------------------------------
 /* */


@@ -230,9 +458,12 @@ bool CacheDB::Finish()
    
    // Write the stat information
    CurStat.Flags = htonl(CurStat.Flags);
    
    // Write the stat information
    CurStat.Flags = htonl(CurStat.Flags);

+   CurStat.FileSize = htonl(CurStat.FileSize);

    InitQuery("st");
    Put(&CurStat,sizeof(CurStat));
    CurStat.Flags = ntohl(CurStat.Flags);
    InitQuery("st");
    Put(&CurStat,sizeof(CurStat));
    CurStat.Flags = ntohl(CurStat.Flags);

+   CurStat.FileSize = ntohl(CurStat.FileSize);
+

    return true;
 }
                                                                        /*}}}*/
    return true;
 }
                                                                        /*}}}*/


@@ -246,15 +477,9 @@ bool CacheDB::Clean()
 
    /* I'm not sure what VERSION_MINOR should be here.. 2.4.14 certainly
       needs the lower one and 2.7.7 needs the upper.. */
 
    /* I'm not sure what VERSION_MINOR should be here.. 2.4.14 certainly
       needs the lower one and 2.7.7 needs the upper.. */

-#if DB_VERSION_MAJOR >= 2 && DB_VERSION_MINOR >= 7
-   DBC *Cursor;
-   if ((errno = Dbp->cursor(Dbp,0,&Cursor,0)) != 0)
-      return _error->Error("Unable to get a cursor");
-#else

    DBC *Cursor;
    DBC *Cursor;

-   if ((errno = Dbp->cursor(Dbp,0,&Cursor)) != 0)
-      return _error->Error("Unable to get a cursor");
-#endif
+   if ((errno = Dbp->cursor(Dbp, NULL, &Cursor, 0)) != 0)
+      return _error->Error(_("Unable to get a cursor"));

    
    DBT Key;
    DBT Data;
    
    DBT Key;
    DBT Data;


@@ -262,22 +487,21 @@ bool CacheDB::Clean()
    memset(&Data,0,sizeof(Data));
    while ((errno = Cursor->c_get(Cursor,&Key,&Data,DB_NEXT)) == 0)
    {
    memset(&Data,0,sizeof(Data));
    while ((errno = Cursor->c_get(Cursor,&Key,&Data,DB_NEXT)) == 0)
    {

-      const char *Colon = (char *)Key.data;
-      for (; Colon != (char *)Key.data+Key.size && *Colon != ':'; Colon++);
-      if ((char *)Key.data+Key.size - Colon > 2)
+      const char *Colon = (char*)memrchr(Key.data, ':', Key.size);
+      if (Colon)

       {
       {

-        if (stringcmp((char *)Key.data,Colon,"st") == 0 ||
-            stringcmp((char *)Key.data,Colon,"cn") == 0 ||
-            stringcmp((char *)Key.data,Colon,"m5") == 0 ||
-            stringcmp((char *)Key.data,Colon,"cl") == 0)
+         if (stringcmp(Colon + 1, (char *)Key.data+Key.size,"st") == 0 ||
+             stringcmp(Colon + 1, (char *)Key.data+Key.size,"cl") == 0 ||
+             stringcmp(Colon + 1, (char *)Key.data+Key.size,"cn") == 0)

         {
         {

-           if (FileExists(string(Colon+1,(const char *)Key.data+Key.size)) == true)
+            if (FileExists(string((const char *)Key.data,Colon)) == true)

                continue;            
         }
       }
       
       Cursor->c_del(Cursor,0);
    }
                continue;            
         }
       }
       
       Cursor->c_del(Cursor,0);
    }

+   Dbp->compact(Dbp, NULL, NULL, NULL, NULL, DB_FREE_SPACE, NULL);

 
    return true;
 }
 
    return true;
 }