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Add "getChunkFromFIle" function to the DecryptionService to get portions of a file

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This commit is contained in:
Maschell 2019-04-06 16:55:57 +02:00
parent e8985f0c12
commit 502acbbf68
1 changed files with 30 additions and 6 deletions
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36
src/de/mas/wiiu/jnus/DecryptionService.java
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@ -16,6 +16,7 @@
****************************************************************************/
package de.mas.wiiu.jnus;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
@ -25,9 +26,7 @@ import java.io.OutputStream;
import java.io.PipedOutputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionException;
import java.util.concurrent.ExecutionException;
@ -149,6 +148,17 @@ public final class DecryptionService {
}
public void decryptFSTEntryToStream(FSTEntry entry, OutputStream outputStream) throws IOException, CheckSumWrongException {
long fileSize = entry.getFileSize();
long fileOffset = entry.getFileOffset();
long fileOffsetBlock = entry.getFileOffsetBlock();
decryptFSTEntryToStream(entry, outputStream, fileSize, fileOffset, fileOffsetBlock);
}
public void decryptFSTEntryToStream(FSTEntry entry, OutputStream outputStream, long fileSize, long fileOffset, long fileOffsetBlock)
throws IOException, CheckSumWrongException {
if (entry.isNotInPackage() || entry.getContent() == null) {
outputStream.close();
return;
@ -156,10 +166,6 @@ public final class DecryptionService {
Content c = entry.getContent();
long fileSize = entry.getFileSize();
long fileOffset = entry.getFileOffset();
long fileOffsetBlock = entry.getFileOffsetBlock();
NUSDataProvider dataProvider = getNUSTitle().getDataProvider();
InputStream in = dataProvider.getInputStreamFromContent(c, fileOffsetBlock);
@ -278,6 +284,24 @@ public final class DecryptionService {
decryptContentFromStream(inputStream, outputStream, content);
}
public byte[] getChunkFromFile(FSTEntry entry, long offset, long size) throws IOException, CheckSumWrongException {
if(!entry.getContent().isHashed()) {
throw new IOException("Only files from hashed contents are currently supported");
}
ByteArrayOutputStream out = new ByteArrayOutputStream();
long fileOffset = entry.getFileOffset() + offset;
long fileOffsetBlock = fileOffset;
if (entry.getContent().isHashed()) {
fileOffsetBlock = (fileOffset / 0xFC00) * 0x10000;
}
decryptFSTEntryToStream(entry, out, size, fileOffset, fileOffsetBlock);
return out.toByteArray();
}
public InputStreamWithException getDecryptedOutputAsInputStream(FSTEntry fstEntry) throws IOException {
PipedInputStreamWithException in = new PipedInputStreamWithException();
PipedOutputStream out = new PipedOutputStream(in);