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CTR AES fixed

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This commit is contained in:
Dmitry Isaenko 2019-05-19 17:13:23 +03:00
parent d3949b90bd
commit 8e5871d2b3
3 changed files with 21 additions and 12 deletions
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27
src/main/java/konogonka/Tools/NCA/NCAContentPFS0.java
View file

@ -8,6 +8,8 @@ import konogonka.ctraes.AesCtr;
import java.io.File;
import java.io.RandomAccessFile;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.LinkedList;
public class NCAContentPFS0 {
@ -39,22 +41,26 @@ public class NCAContentPFS0 {
else
break; // TODO: fix
}
// Get pfs0
raf.seek(pfs0Location);
pfs0 = new PFS0Provider(file, pfs0Location);
raf.close();
// Get pfs0
pfs0 = new PFS0Provider(file, pfs0Location);
}
// If encrypted (regular) todo: check keys provided
else if (ncaSectionBlock.getCryptoType() == 0x3){ // d0c1...
if (decryptedKey == null)
return; // TODO: FIX
//--------------------------------------------------------------------------------------------------
System.out.println("Media start location: " + ncaHeaderTableEntry.getMediaStartOffset());
System.out.println("Media end location: " + ncaHeaderTableEntry.getMediaEndOffset());
System.out.println("Media size = sha h.tbl.size: " + (ncaHeaderTableEntry.getMediaEndOffset()-ncaHeaderTableEntry.getMediaStartOffset()));
System.out.println("Media size : " + (ncaHeaderTableEntry.getMediaEndOffset()-ncaHeaderTableEntry.getMediaStartOffset()));
System.out.println("Media act. location: " + (offsetPosition + (ncaHeaderTableEntry.getMediaStartOffset() * 0x200)));
System.out.println("SHA256 hash tbl size: " + ncaSectionBlock.getSuperBlockPFS0().getHashTableSize());
System.out.println("SHA256 hash tbl offs: " + ncaSectionBlock.getSuperBlockPFS0().getHashTableOffset());
System.out.println("SHA256 records: " + (ncaSectionBlock.getSuperBlockPFS0().getHashTableSize() / 0x20));
System.out.println("KEY: " + LoperConverter.byteArrToHexString(decryptedKey));
System.out.println("CTR: " + LoperConverter.byteArrToHexString(ncaSectionBlock.getSectionCTR()));
System.out.println("PFS0 Offs: "+ncaSectionBlock.getSuperBlockPFS0().getPfs0offset());
System.out.println();
//--------------------------------------------------------------------------------------------------
long thisMediaLocation = offsetPosition + (ncaHeaderTableEntry.getMediaStartOffset() * 0x200); // According to real file
@ -66,7 +72,7 @@ public class NCAContentPFS0 {
// IV for CTR == 32 bytes
byte[] IVarray = new byte[0x10];
// Populate first 8 bytes taken from Header's section Block CTR
System.arraycopy(LoperConverter.flip(ncaSectionBlock.getSectionCTR()), 0, IVarray,0, 8);
System.arraycopy(LoperConverter.flip(ncaSectionBlock.getSectionCTR()), 0x0, IVarray,0x0, 0x8);
// Populate last 8 bytes calculated. Thanks hactool project!
// TODO: here is too much magic. It MUST be clarified and simplified
long mediaStrtOffReal = ncaHeaderTableEntry.getMediaStartOffset() * 0x200; // NOTE: long actually should be unsigned.. for calculation it's not critical, but for representation it is
@ -82,14 +88,17 @@ public class NCAContentPFS0 {
byte[] dectyptedBlock;
long mediaBlockSize = ncaHeaderTableEntry.getMediaEndOffset()-ncaHeaderTableEntry.getMediaStartOffset();
int j = 0;
for (int i = 0; i < mediaBlockSize; i++){
encryptedBlock = new byte[0x200];
if (raf.read(encryptedBlock) != -1){
dectyptedBlock = aesCtr.decrypt(encryptedBlock);
System.out.println(new String(dectyptedBlock, (int)ncaSectionBlock.getSuperBlockPFS0().getPfs0offset(), 0x4, StandardCharsets.US_ASCII));
/*
*/
j++;
}
}

4
src/main/java/konogonka/Tools/NCA/NCASectionTableBlock/NCASectionBlock.java
View file

@ -92,8 +92,8 @@ public class NCASectionBlock {
public byte[] getBKTRunknownSection2() { return BKTRunknownSection2; }
public byte[] getSectionCTR() { return sectionCTR; }
// Sugar
public byte[] getSectionCTRlow() { return Arrays.copyOfRange(sectionCTR, 0, 0x8); }
public byte[] getSectionCTRhigh() { return Arrays.copyOfRange(sectionCTR, 0x8, 0x10); }
public byte[] getSectionCTRlow() { return Arrays.copyOfRange(sectionCTR, 0, 0x4); }
public byte[] getSectionCTRhigh() { return Arrays.copyOfRange(sectionCTR, 0x4, 0x8); }
public byte[] getUnknownEndPadding() { return unknownEndPadding; }
}

2
src/main/java/konogonka/ctraes/AesCtr.java
View file

@ -18,7 +18,7 @@ public class AesCtr {
private Cipher cipher;
public AesCtr(byte[] IVarray, byte[] keyArray) throws Exception{
public AesCtr(byte[] keyArray, byte[] IVarray) throws Exception{
if ( ! BCinitialized)
initBCProvider();