/** @return whether the archive is encrypted */
public boolean isEncrypted() {
if (newMhd != null) {
return newMhd.isEncrypted();
} else {
throw new NullPointerException("mainheader is null");
}
}
/**
* Read the headers of the archive
*
* @param fileLength Length of file.
* @throws RarException
*/
private void readHeaders(long fileLength) throws IOException, RarException {
markHead = null;
newMhd = null;
headers.clear();
currentHeaderIndex = 0;
int toRead = 0;
while (true) {
int size = 0;
long newpos = 0;
byte[] baseBlockBuffer = new byte[BaseBlock.BaseBlockSize];
long position = rof.getPosition();
// Weird, but is trying to read beyond the end of the file
if (position >= fileLength) {
break;
}
// logger.info("\n--------reading header--------");
size = rof.readFully(baseBlockBuffer, BaseBlock.BaseBlockSize);
if (size == 0) {
break;
}
BaseBlock block = new BaseBlock(baseBlockBuffer);
block.setPositionInFile(position);
switch (block.getHeaderType()) {
case MarkHeader:
markHead = new MarkHeader(block);
if (!markHead.isSignature()) {
throw new RarException(RarException.RarExceptionType.badRarArchive);
}
headers.add(markHead);
// markHead.print();
break;
case MainHeader:
toRead =
block.hasEncryptVersion()
? MainHeader.mainHeaderSizeWithEnc
: MainHeader.mainHeaderSize;
byte[] mainbuff = new byte[toRead];
rof.readFully(mainbuff, toRead);
MainHeader mainhead = new MainHeader(block, mainbuff);
headers.add(mainhead);
this.newMhd = mainhead;
if (newMhd.isEncrypted()) {
throw new RarException(RarExceptionType.rarEncryptedException);
}
// mainhead.print();
break;
case SignHeader:
toRead = SignHeader.signHeaderSize;
byte[] signBuff = new byte[toRead];
rof.readFully(signBuff, toRead);
SignHeader signHead = new SignHeader(block, signBuff);
headers.add(signHead);
// logger.info("HeaderType: SignHeader");
break;
case AvHeader:
toRead = AVHeader.avHeaderSize;
byte[] avBuff = new byte[toRead];
rof.readFully(avBuff, toRead);
AVHeader avHead = new AVHeader(block, avBuff);
headers.add(avHead);
// logger.info("headertype: AVHeader");
break;
case CommHeader:
toRead = CommentHeader.commentHeaderSize;
byte[] commBuff = new byte[toRead];
rof.readFully(commBuff, toRead);
CommentHeader commHead = new CommentHeader(block, commBuff);
headers.add(commHead);
// logger.info("method: "+commHead.getUnpMethod()+"; 0x"+
// Integer.toHexString(commHead.getUnpMethod()));
newpos = commHead.getPositionInFile() + commHead.getHeaderSize();
rof.setPosition(newpos);
break;
case EndArcHeader:
toRead = 0;
if (block.hasArchiveDataCRC()) {
toRead += EndArcHeader.endArcArchiveDataCrcSize;
}
if (block.hasVolumeNumber()) {
toRead += EndArcHeader.endArcVolumeNumberSize;
}
EndArcHeader endArcHead;
if (toRead > 0) {
byte[] endArchBuff = new byte[toRead];
rof.readFully(endArchBuff, toRead);
endArcHead = new EndArcHeader(block, endArchBuff);
// logger.info("HeaderType: endarch\ndatacrc:"+
// endArcHead.getArchiveDataCRC());
} else {
// logger.info("HeaderType: endarch - no Data");
endArcHead = new EndArcHeader(block, null);
}
headers.add(endArcHead);
// logger.info("\n--------end header--------");
return;
default:
byte[] blockHeaderBuffer = new byte[BlockHeader.blockHeaderSize];
rof.readFully(blockHeaderBuffer, BlockHeader.blockHeaderSize);
BlockHeader blockHead = new BlockHeader(block, blockHeaderBuffer);
switch (blockHead.getHeaderType()) {
case NewSubHeader:
case FileHeader:
toRead =
blockHead.getHeaderSize()
- BlockHeader.BaseBlockSize
- BlockHeader.blockHeaderSize;
byte[] fileHeaderBuffer = new byte[toRead];
rof.readFully(fileHeaderBuffer, toRead);
FileHeader fh = new FileHeader(blockHead, fileHeaderBuffer);
headers.add(fh);
newpos = fh.getPositionInFile() + fh.getHeaderSize() + fh.getFullPackSize();
rof.setPosition(newpos);
break;
case ProtectHeader:
toRead =
blockHead.getHeaderSize()
- BlockHeader.BaseBlockSize
- BlockHeader.blockHeaderSize;
byte[] protectHeaderBuffer = new byte[toRead];
rof.readFully(protectHeaderBuffer, toRead);
ProtectHeader ph = new ProtectHeader(blockHead, protectHeaderBuffer);
newpos = ph.getPositionInFile() + ph.getHeaderSize() + ph.getDataSize();
rof.setPosition(newpos);
break;
case SubHeader:
{
byte[] subHeadbuffer = new byte[SubBlockHeader.SubBlockHeaderSize];
rof.readFully(subHeadbuffer, SubBlockHeader.SubBlockHeaderSize);
SubBlockHeader subHead = new SubBlockHeader(blockHead, subHeadbuffer);
subHead.print();
switch (subHead.getSubType()) {
case MAC_HEAD:
{
byte[] macHeaderbuffer = new byte[MacInfoHeader.MacInfoHeaderSize];
rof.readFully(macHeaderbuffer, MacInfoHeader.MacInfoHeaderSize);
MacInfoHeader macHeader = new MacInfoHeader(subHead, macHeaderbuffer);
macHeader.print();
headers.add(macHeader);
break;
}
// TODO implement other subheaders
case BEEA_HEAD:
break;
case EA_HEAD:
{
byte[] eaHeaderBuffer = new byte[EAHeader.EAHeaderSize];
rof.readFully(eaHeaderBuffer, EAHeader.EAHeaderSize);
EAHeader eaHeader = new EAHeader(subHead, eaHeaderBuffer);
eaHeader.print();
headers.add(eaHeader);
break;
}
case NTACL_HEAD:
break;
case STREAM_HEAD:
break;
case UO_HEAD:
toRead = subHead.getHeaderSize();
toRead -= BaseBlock.BaseBlockSize;
toRead -= BlockHeader.blockHeaderSize;
toRead -= SubBlockHeader.SubBlockHeaderSize;
byte[] uoHeaderBuffer = new byte[toRead];
rof.readFully(uoHeaderBuffer, toRead);
UnixOwnersHeader uoHeader = new UnixOwnersHeader(subHead, uoHeaderBuffer);
uoHeader.print();
headers.add(uoHeader);
break;
default:
break;
}
break;
}
default:
logger.warning("Unknown Header");
throw new RarException(RarExceptionType.notRarArchive);
}
}
// logger.info("\n--------end header--------");
}
}