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RSAPadding: attempt

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This commit is contained in:
khanhduytran0 2020-07-27 15:56:11 +07:00
parent 6e0f5e819c
commit ede65a8c90
2 changed files with 47 additions and 46 deletions
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54
app/src/main/java/net/kdt/pojavlaunch/MainActivity.java
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@ -986,51 +986,20 @@ public class MainActivity extends AppCompatActivity implements OnTouchListener,
public void fixRSAPadding() throws Exception {
// welcome to the territory of YOLO; I'll be your tour guide for today.
System.out.println("Before: " + KeyFactory.getInstance("RSA") + " ; " + KeyFactory.getInstance("RSA").getProvider().toString());
try {
/*
System.out.println(Cipher.getInstance("RSA"));
System.out.println(Cipher.getInstance("RSA/ECB/PKCS1Padding"));
*/
if (android.os.Build.VERSION.SDK_INT > 23) { // Nougat
// GetInstance.getServices("KeyPairGenerator", algorithm);
// Since Android 7, it use sun.security.jca.GetInstance
Cipher rsaPkcs1Cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
Cipher rsaCipher = Cipher.getInstance("RSA");
/*
for (Provider.Service ser : rsaPkcs1Cipher.getProvider().getServices()) {
System.out.println(" - " + ser.getType() + ", " + ser.getAlgorithm());
}
*/
Provider.Service servicePkcs1 = rsaPkcs1Cipher.getProvider().getService("Cipher", "RSA/ECB/PKCS1Padding");
Provider rsaProvider = rsaCipher.getProvider();
Map pkcs1Map = new ArrayMap();
for (Map.Entry entry : servicePkcs1.getProvider().entrySet()) {
pkcs1Map.put(entry.getKey(), entry.getValue());
}
if (Build.VERSION.SDK_INT < 24) {
rsaProvider.putAll(pkcs1Map);
Class.forName("sun.security.jca.GetInstance")
.getDeclaredMethod("getServices", String.class, String.class)
.invoke(null, new Object[]{"Cipher", "RSA"});
} else {
// Method rsaMethod_clear = rsaProvider.getClass().getDeclaredMethod("implClear");
Method rsaMethod_putAll = rsaProvider.getClass().getDeclaredMethod("implPutAll", Map.class);
// rsaMethod_clear.setAccessible(true);
rsaMethod_putAll.setAccessible(true);
// rsaMethod_clear.invoke(rsaProvider);
rsaMethod_putAll.invoke(rsaProvider, pkcs1Map);
ArrayList<Provider.Service> rsaList = Services.getServices("Cipher.RSA");
ArrayList<Provider.Service> rsaPkcs1List = Services.getServices("Cipher.RSA/ECB/PKCS1PADDING");
rsaList.clear();
rsaList.addAll(rsaPkcs1List);
}
/*
if (android.os.Build.VERSION.SDK_INT >= 23) { // Marshmallow
// FUUUUU I DON'T KNOW FIXME
} else {
ArrayList<Provider.Service> rsaList = Services.getServices("Cipher.RSA");
ArrayList<Provider.Service> rsaPkcs1List = Services.getServices("Cipher.RSA/ECB/PKCS1PADDING");
rsaList.clear();
rsaList.addAll(rsaPkcs1List);
}
*/
} catch (Throwable th) {
th.printStackTrace();
@ -1059,9 +1028,6 @@ public class MainActivity extends AppCompatActivity implements OnTouchListener,
});
}
System.out.println("After: " + KeyFactory.getInstance("RSA") + " ; " + KeyFactory.getInstance("RSA").getProvider().toString());
/*
Provider provider = KeyFactory.getInstance("RSA").getProvider();
System.out.println("Before: " + provider.getService("KeyService", "RSA"));

35
app/src/main/java/net/kdt/pojavlaunch/Modifiable.java Normal file
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@ -0,0 +1,35 @@
package net.kdt.pojavlaunch;
import java.util.*;
import java.lang.reflect.*;
// This class simply get the modifiable original Collection from unmodifable one.
public class Modifiable
{
public static <E> Collection<E> modifyCollection(Collection<? extends E> collection) {
if (collection == null) {
throw new NullPointerException("collection == null");
} else if (collection.getClass().getSimpleName().startsWith("Unmodifiable")) {
Field collectionField = null;
try {
collectionField = Class.forName("java.util.Collections$UnmodifiableCollection").getDeclaredField("c");
} catch (Throwable th) {
th.printStackTrace();
}
if (collectionField != null) {
collectionField.setAccessible(true);
try {
return (Collection<E>) collectionField.get(collection);
} catch (Throwable th) {
th.printStackTrace();
}
}
}
return (Collection<E>) collection;
}
public static <E> Set<E> modifySet(Set<? extends E> set) {
return (Set<E>) modifyCollection(set);
}
}