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XTS AES - remove deprecated BouncyCastle methods usage

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This commit is contained in:
Dmitry Isaenko 2023-01-21 14:17:50 +03:00
parent 6e4e4dd3e7
commit 394bc8f226
3 changed files with 25 additions and 33 deletions
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6
src/main/java/libKonogonka/xtsaes/XTSAESCipher.java
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@ -34,10 +34,8 @@ import java.util.function.LongFunction;
* XTS-AES cipher with arbitrary (non 128-bit aligned) data unit lengths.
*
* @author Ahseya
*/
/**
* Updated for special usage by Dmitry Isaenko.
*
* Class updated for NCAs usage.
* */
@NotThreadSafe
public class XTSAESCipher {

12
src/main/java/libKonogonka/xtsaes/XTSCore.java
View file

@ -26,7 +26,7 @@ package libKonogonka.xtsaes;
import net.jcip.annotations.NotThreadSafe;
import org.bouncycastle.crypto.BlockCipher;
import org.bouncycastle.crypto.DataLengthException;
import org.bouncycastle.crypto.engines.AESFastEngine;
import org.bouncycastle.crypto.engines.AESEngine;
import org.bouncycastle.crypto.params.KeyParameter;
import java.util.Arrays;
@ -36,10 +36,8 @@ import java.util.Objects;
* XTS core functions.
*
* @author Ahseya
*/
/**
* Updated for special usage by Dmitry Isaenko.
*
* Class updated for NCAs usage.
* */
@NotThreadSafe
class XTSCore {
@ -56,7 +54,7 @@ class XTSCore {
}
XTSCore(XTSTweak tweak) {
this(new AESFastEngine(), tweak);
this(new AESEngine(), tweak);
}
XTSCore(boolean isDefault) {
@ -64,7 +62,7 @@ class XTSCore {
}
XTSCore init(boolean forEncryption, KeyParameter key) throws IllegalArgumentException {
byte[] k = ((KeyParameter) key).getKey();
byte[] k = key.getKey();
if (k.length != 32 && k.length != 64) {
throw new IllegalArgumentException("bad key length: " + k.length);
}

40
src/main/java/libKonogonka/xtsaes/XTSTweak.java
View file

@ -26,7 +26,7 @@ package libKonogonka.xtsaes;
import net.jcip.annotations.NotThreadSafe;
import org.bouncycastle.crypto.BlockCipher;
import org.bouncycastle.crypto.DataLengthException;
import org.bouncycastle.crypto.engines.AESFastEngine;
import org.bouncycastle.crypto.engines.AESEngine;
import org.bouncycastle.crypto.params.KeyParameter;
import org.bouncycastle.util.Pack;
@ -38,29 +38,11 @@ import java.util.function.LongFunction;
* XTS tweak with pluggable tweak function.
*
* @author Ahseya
*/
/**
* Updated for special usage by Dmitry Isaenko.
*
* Class updated for NCAs usage.
* */
@NotThreadSafe
class XTSTweak {
static byte[] nintTweakFunction(long tweakValue) {
byte[] bs = new byte[BLOCK_SIZE];
byte[] twk = Pack.longToBigEndian(tweakValue);
int j = BLOCK_SIZE - twk.length;
for (byte b: twk){
bs[j++] = b;
}
return bs;
}
static byte[] defaultTweakFunction(long tweakValue) {
byte[] bs = Pack.longToLittleEndian(tweakValue);
bs = Arrays.copyOfRange(bs, 0, BLOCK_SIZE);
return bs;
}
private static final long FDBK = 0x87;
private static final long MSB = 0x8000000000000000L;
private static final int BLOCK_SIZE = 16;
@ -84,7 +66,7 @@ class XTSTweak {
}
XTSTweak(LongFunction<byte[]> tweakFunction) {
this(new AESFastEngine(), tweakFunction);
this(new AESEngine(), tweakFunction);
}
XTSTweak(boolean isDefault) {
@ -92,6 +74,20 @@ class XTSTweak {
? XTSTweak::defaultTweakFunction
: XTSTweak::nintTweakFunction);
}
static byte[] defaultTweakFunction(long tweakValue) {
byte[] bs = Pack.longToLittleEndian(tweakValue);
bs = Arrays.copyOfRange(bs, 0, BLOCK_SIZE);
return bs;
}
static byte[] nintTweakFunction(long tweakValue) {
byte[] bs = new byte[BLOCK_SIZE];
byte[] twk = Pack.longToBigEndian(tweakValue);
int j = BLOCK_SIZE - twk.length;
for (byte b: twk){
bs[j++] = b;
}
return bs;
}
XTSTweak init(KeyParameter key) throws IllegalArgumentException {
cipher.init(true, key);