Help! How to compare between String method with our Monostring input

[VounderS]

i really want to know this is correct way to do unlink with String get_name ? I try to hook this method but it doesnt work

I use this MonoString

typedef struct _monoString
{
    void* klass;
    void* monitor;
    int length;
    char chars[1];

    int getLength()
    {
        return length;
    }
    char* getChars()
    {
        return chars;
    }
}monoString;

monoString *CreateString(const char *str) {
    monoString *(*CreateString)(void *_this, const char *str, int start, int length) = (monoString *(*)(void *, const char *, int, int))IL2CPP_H::Il2CppGetMethodOffset(OBFUSCATE("mscorlib.dll"), OBFUSCATE("System"), OBFUSCATE("String"), OBFUSCATE("CreateString"), 3);
    int length = (int)strlen(str);
    return CreateString(NULL, str, 0, length);

}

This is how i hook it

monoString *(*get_name)(void *inst);
void (*org_EntityListUpdate)(void *object);
void new_EntityListUpdate(void *object) {
    if(player != NULL){
        auto name = get_name(object);
        if(name == CreateString("purple_coin_8")){
            if (!objectFind(object))
            {
                objectList.push_back(object);
            }
        }

    }
    org_EntityListUpdate(object);
}

//hack thread
get_name = (monoString *(*)(void *))IL2CPP_H::Il2CppGetMethodOffset(OBFUSCATE("Scripts.dll"), OBFUSCATE("Oak"), OBFUSCATE("FieldObject"), OBFUSCATE("get_Name"), 0);
DobbyHook((void *)IL2CPP_H::Il2CppGetMethodOffset(OBFUSCATE("Scripts.dll"), OBFUSCATE("Oak"), OBFUSCATE("FieldObject") , OBFUSCATE("get_FieldObjectStatsBehaviour"), 0), (void *) new_EntityListUpdate , (void **) &org_EntityListUpdate);

 

[Slushball]

== is checking the Pointer values not the string itself. make a function pointer to the string Equals method located in the string class hope this helps!

 

[VounderS]

== is checking the Pointer values not the string itself. make a function pointer to the string Equals method located in the string class hope this helps!

Hi ty for reply me, im really new for this can you show me some example, Thank you

 

[VounderS]

== is checking the Pointer values not the string itself. make a function pointer to the string Equals method located in the string class hope this helps!

Solve thx mate it work

 

[libModz]

Solve thx mate it work

How did you solve it?

 

[VounderS]

How did you solve it?

by using equals function

bool (*get_equals)(monoString *a, monoString *b, int type);

bool (*old_IsSubUnit)(void *instance);
bool new_IsSubUnit(void *instance)
{
    if(instance != NULL)
    {
        monoString *a = CreateString("Evan");
        monoString *b = get_name(instance);
        if(get_equals(a,b, 5)){
            LOGD("Equals");
        }else{
            LOGD("Not Equals");
        }
    }
    return old_IsSubUnit(instance);
}


//hack thread
get_equals = (bool (*)(monoString *, monoString *, int))Il2CppGetMethodOffset(OBFUSCATE("mscorlib.dll"), OBFUSCATE("System"), OBFUSCATE("String"), OBFUSCATE("Equals"), 3);

oh yeah you can also just hook Equals that has 2 param (string a, string b) i hook this equals cause il2cppgenerator hook diffrent equals

 

[libModz]

by using equals function

bool (*get_equals)(monoString *a, monoString *b, int type);

bool (*old_IsSubUnit)(void *instance);
bool new_IsSubUnit(void *instance)
{
    if(instance != NULL)
    {
        monoString *a = CreateString("Evan");
        monoString *b = get_name(instance);
        if(get_equals(a,b, 5)){
            LOGD("Equals");
        }else{
            LOGD("Not Equals");
        }
    }
    return old_IsSubUnit(instance);
}


//hack thread
get_equals = (bool (*)(monoString *, monoString *, int))Il2CppGetMethodOffset(OBFUSCATE("mscorlib.dll"), OBFUSCATE("System"), OBFUSCATE("String"), OBFUSCATE("Equals"), 3);

oh yeah you can also just hook Equals that has 2 param (string a, string b) i hook this equals cause il2cppgenerator hook diffrent equals

What is the number 5 int *type parameter for?

 

[VounderS]

What is the number 5 int *type parameter for?

its enum class to comparisontype

public enum StringComparison
{
    // Fields
    public Int32 value__; // 0x10
    public const StringComparison CurrentCulture = 0; // 0x0
    public const StringComparison CurrentCultureIgnoreCase = 1; // 0x0
    public const StringComparison InvariantCulture = 2; // 0x0
    public const StringComparison InvariantCultureIgnoreCase = 3; // 0x0
    public const StringComparison Ordinal = 4; // 0x0
    public const StringComparison OrdinalIgnoreCase = 5; // 0x0

}

like i said if u using absoluteaddress or BNM that has paramtype just hook Equals(String a, String b) but when i use il2cppgenerator i shoul hook this equals cause it have different param

 

[libModz]

its enum class to comparisontype

public enum StringComparison
{
    // Fields
    public Int32 value__; // 0x10
    public const StringComparison CurrentCulture = 0; // 0x0
    public const StringComparison CurrentCultureIgnoreCase = 1; // 0x0
    public const StringComparison InvariantCulture = 2; // 0x0
    public const StringComparison InvariantCultureIgnoreCase = 3; // 0x0
    public const StringComparison Ordinal = 4; // 0x0
    public const StringComparison OrdinalIgnoreCase = 5; // 0x0

}

like i said if u using absoluteaddress or BNM that has paramtype just hook Equals(String a, String b) but when i use il2cppgenerator i shoul hook this equals cause it have different param

Okay thanks

 

[VounderS]

Okay thanks

sureman thx for the createstring