@@ -1,3 +1,7 @@

+Wed Mar 31 18:07:05 CEST 2010 (acab)

+------------------------------------

+  * libclamav/7z: add recovery mode to 7z ansi

+

 Tue Jan 17 11:15:57 CET 2012 (acab)

 -----------------------------------

  * misc: performance improvement for HP-UX PA-RISC - patch from 

@@ -1241,8 +1241,33 @@ static SRes SzArEx_Open2(

   p->startPosAfterHeader = startArcPos + k7zStartHeaderSize;

+/* aCaB - 2010-02-16 - RECOVERY MODE  

   if (CrcCalc(header + 12, 20) != GetUi32(header + 8))

-    return SZ_ERROR_CRC;

+    return SZ_ERROR_CRC; */

+  if(!GetUi32(header + 8) && !nextHeaderOffset && !nextHeaderSize && !nextHeaderCRC) {

+    int i, checkSize = 500;

+    Byte buf[500];

+    Int64 curpos=0, endpos=0, readpos;

+    RINOK(inStream->Seek(inStream, &curpos, SZ_SEEK_CUR));

+    RINOK(inStream->Seek(inStream, &endpos, SZ_SEEK_END));

+    if(endpos-curpos < 500) checkSize = endpos-curpos;

+    readpos = endpos - checkSize;

+    RINOK(inStream->Seek(inStream, &readpos, SZ_SEEK_SET));

+    RINOK(LookInStream_Read2(inStream, buf, checkSize, SZ_ERROR_ARCHIVE));

+    for (i = (int)checkSize - 2; i >= 0; i--)

+      if((buf[i] == 0x17 && buf[i + 1] == 0x6) || (buf[i] == 0x01 && buf[i + 1] == 0x04))

+	break;

+    if (i < 0)

+      return SZ_ERROR_ARCHIVE;

+    nextHeaderSize = checkSize - i;

+    nextHeaderOffset = readpos + i;

+    if(nextHeaderOffset < k7zStartHeaderSize)

+      return SZ_ERROR_INPUT_EOF;

+    nextHeaderOffset -= k7zStartHeaderSize;

+    nextHeaderCRC = CrcCalc(buf + i, (size_t)nextHeaderSize);

+    RINOK(inStream->Seek(inStream, &curpos, SZ_SEEK_SET));

+  }

+/* aCaB - 2010-02-16 - END OF RECOVERY MODE */

   nextHeaderSizeT = (size_t)nextHeaderSize;

   if (nextHeaderSizeT != nextHeaderSize)