deal with all broken variants (#292)

* remove variant code for arm32

* deal with all broken variants

app/src/main/cpp/monerujo.cpp

@@ -698,18 +698,23 @@ Java_com_m2049r_xmrwallet_model_Wallet_isSynchronized(JNIEnv *env, jobject insta
 //void cn_slow_hash(const void *data, size_t length, char *hash); // from crypto/hash-ops.h
 JNIEXPORT jbyteArray JNICALL
 Java_com_m2049r_xmrwallet_util_KeyStoreHelper_slowHash(JNIEnv *env, jobject clazz,
-                                                       jbyteArray data, jboolean broken) {
+                                                       jbyteArray data, jint brokenVariant) {
     char hash[HASH_SIZE];
     jsize size = env->GetArrayLength(data);
-    if (broken && (size < 200 /*sizeof(union hash_state)*/)) {
+    if ((brokenVariant > 0) && (size < 200 /*sizeof(union hash_state)*/)) {
         return nullptr;
     }
 
     jbyte *buffer = env->GetByteArrayElements(data, NULL);
-    if (broken) {
-        slow_hash_broken(buffer, hash);
-    } else {
-        slow_hash(buffer, (size_t) size, hash);
+    switch (brokenVariant) {
+        case 1:
+            slow_hash_broken(buffer, hash, 1);
+            break;
+        case 2:
+            slow_hash_broken(buffer, hash, 0);
+            break;
+        default: // not broken
+            slow_hash(buffer, (size_t) size, hash);
     }
     env->ReleaseByteArrayElements(data, buffer, JNI_ABORT); // do not update java byte[]
     jbyteArray result = env->NewByteArray(HASH_SIZE);

app/src/main/cpp/monerujo.h

@@ -66,8 +66,8 @@ inline void slow_hash(const void *data, const size_t length, char *hash) {
     cn_slow_hash(data, length, hash, 0 /* variant */, 0/*prehashed*/);
 }
 
-inline void slow_hash_broken(const void *data, char *hash) {
-    cn_slow_hash(data, 200 /*sizeof(union hash_state)*/, hash, 1 /* variant */, 1 /*prehashed*/);
+inline void slow_hash_broken(const void *data, char *hash, int variant) {
+    cn_slow_hash(data, 200 /*sizeof(union hash_state)*/, hash, variant, 1 /*prehashed*/);
 }
 
 #ifdef __cplusplus

app/src/main/java/com/m2049r/xmrwallet/util/Helper.java

@@ -361,10 +361,16 @@ public class Helper {
             return crazyPass;
         }
 
-        // or maybe it is a broken CrAzYpass?
-        String brokenCrazyPass = KeyStoreHelper.getBrokenCrazyPass(context, password);
-        if (WalletManager.getInstance().verifyWalletPassword(walletPath, brokenCrazyPass, true)) {
-            return brokenCrazyPass;
+        // or maybe it is a broken CrAzYpass? (of which we have two variants)
+        String brokenCrazyPass2 = KeyStoreHelper.getBrokenCrazyPass(context, password, 2);
+        if ((brokenCrazyPass2 != null)
+                && WalletManager.getInstance().verifyWalletPassword(walletPath, brokenCrazyPass2, true)) {
+            return brokenCrazyPass2;
+        }
+        String brokenCrazyPass1 = KeyStoreHelper.getBrokenCrazyPass(context, password, 1);
+        if ((brokenCrazyPass1 != null)
+                && WalletManager.getInstance().verifyWalletPassword(walletPath, brokenCrazyPass1, true)) {
+            return brokenCrazyPass1;
         }
 
         return null;

app/src/main/java/com/m2049r/xmrwallet/util/KeyStoreHelper.java

@@ -61,17 +61,17 @@ public class KeyStoreHelper {
         System.loadLibrary("monerujo");
     }
 
-    public static native byte[] slowHash(byte[] data, boolean broken);
+    public static native byte[] slowHash(byte[] data, int brokenVariant);
 
     static final private String RSA_ALIAS = "MonerujoRSA";
 
-    private static String getCrazyPass(Context context, String password, boolean broken) {
+    private static String getCrazyPass(Context context, String password, int brokenVariant) {
         byte[] data = password.getBytes(StandardCharsets.UTF_8);
         byte[] sig = null;
         try {
             KeyStoreHelper.createKeys(context, RSA_ALIAS);
             sig = KeyStoreHelper.signData(RSA_ALIAS, data);
-            byte[] hash = slowHash(sig, broken);
+            byte[] hash = slowHash(sig, brokenVariant);
             if (hash == null) {
                 throw new IllegalStateException("Slow Hash is null!");
             }
@@ -84,19 +84,16 @@ public class KeyStoreHelper {
     }
 
     public static String getCrazyPass(Context context, String password) {
-        return getCrazyPass(context, password, false);
+        return getCrazyPass(context, password, 0);
     }
 
-    public static String getBrokenCrazyPass(Context context, String password) {
+    public static String getBrokenCrazyPass(Context context, String password, int brokenVariant) {
         // due to a link bug in the initial implementation, some crazypasses were built with
         // prehash & variant == 1
         // since there are wallets out there, we need to keep this here
-
-        // arm32 variant code is broken in monero-core
-        // (raises "signal 7 (SIGBUS), code 1 (BUS_ADRALN)" in cn_slow_hash())
-        if (isArm32()) return "";
-
-        return getCrazyPass(context, password, true);
+        // yes, it's a mess
+        if (isArm32() && (brokenVariant != 2)) return null;
+        return getCrazyPass(context, password, brokenVariant);
     }
 
     private static Boolean isArm32 = null;