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stop checking the method classloaders

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This commit is contained in:
Jean-Marie 'Histausse' Mineau 2025-05-28 15:33:45 +02:00
parent 79664a1cb4
commit 7b6f323756
Signed by: histausse
GPG key ID: B66AEEDA9B645AD2
2 changed files with 27 additions and 75 deletions
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84
patcher/src/reflection_patcher.rs
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@ -1,7 +1,7 @@
use androscalpel::SmaliName;
use androscalpel::{Code, IdMethod, IdMethodType, IdType, Instruction, Method};
use anyhow::{bail, Context, Result};
use log::{debug, error, warn};
use log::{debug, warn};
use std::collections::HashMap;
use std::hash::{DefaultHasher, Hash, Hasher};
@ -232,16 +232,10 @@ pub fn transform_method(
"Lcom/example/theseus/dynandref/Main;->factoryInterface(Landroid/app/Activity;Ljava/lang/Class;ZBSCIJFD[Ljava/lang/String;)V"
).unwrap()
{
error!(
"Patching instanciation of {}",
ref_data.constructor.class_.__str__()
);
let mut cl_id = Some(&ref_data.constructor_cl_id);
while let Some(id) = cl_id {
error!(" cl id : {id}");
let cl = runtime_data.classloaders.get(id);
if let Some(cl) = cl {
error!(" cl str: {}", cl.string_representation.as_str());
cl_id = cl.parent_id.as_ref();
} else {
cl_id = None
@ -260,26 +254,6 @@ pub fn transform_method(
)? {
new_insns.push(ins);
}
if ref_data.constructor
== IdMethod::from_smali(
"Lcom/example/theseus/dynandref/AReflectee;-><init>()V",
)
.unwrap()
&&
meth.descriptor == IdMethod::from_smali(
"Lcom/example/theseus/dynandref/Main;->factoryInterface(Landroid/app/Activity;Ljava/lang/Class;ZBSCIJFD[Ljava/lang/String;)V"
).unwrap()
{
let key = (ref_data.constructor.clone(), ref_data.constructor_cl_id.clone());
error!(
" tester method: {}",
tester_methods
.get(&key)
.unwrap()
.descriptor
.__str__()
);
}
}
} else {
panic!("Should not happen!")
@ -379,32 +353,6 @@ pub fn transform_method(
// Add the new code
code.insns.append(&mut new_insns);
code.registers_size += register_info.get_nb_added_reg();
if meth.descriptor
== IdMethod::from_smali(
"Lcom/example/theseus/dynandref/Main;->\
factoryInterface(\
Landroid/app/Activity;Ljava/lang/Class;ZBSCIJFD[Ljava/lang/String;\
)V",
)
.unwrap()
{
for ins in &code.insns {
let indent = if let Instruction::Label { .. } = &ins {
""
} else {
" "
};
error!(" {indent}{}", ins.__str__());
}
use androscalpel::MethodCFG;
println!("{}", MethodCFG::new(meth).unwrap().to_dot(true));
for (lab, refdatas) in ABORD_LABELS.lock().unwrap().iter() {
error!("label {lab}");
for refdata in refdatas {
error!(" {refdata}");
}
}
}
Ok(())
}
@ -414,7 +362,7 @@ fn gen_tester_method(
method_to_test: IdMethod,
is_constructor: bool,
classloader: Option<String>,
runtime_data: &RuntimeData,
_runtime_data: &RuntimeData,
) -> Result<Method> {
let mut hasher = DefaultHasher::new();
if let Some(ref id) = classloader {
@ -491,12 +439,13 @@ fn gen_tester_method(
const REG_TST_VAL: u8 = 2;
const REG_DEF_TYPE: u8 = 3;
const REG_CMP_VAL: u8 = 4;
const REG_CLASS_LOADER: u8 = 5;
const _REG_CLASS_LOADER: u8 = 5;
const REG_REGEX: u8 = 6;
const REG_REPLACE: u8 = 7;
const REG_IF_RES: u8 = 8;
const REG_REF_METHOD: u8 = 9;
/*
fn standardize_name(reg: u8, old_app_path: &str) -> Vec<Instruction> {
let tmp_reg = REG_IF_RES;
vec![
@ -565,7 +514,7 @@ fn gen_tester_method(
},
Instruction::MoveResultObject { to: reg },
]
}
}*/
// Check for arg type
let mut insns = if !is_constructor {
@ -723,6 +672,9 @@ fn gen_tester_method(
}
insns.push(Instruction::MoveResultObject { to: REG_DEF_TYPE });
/* Checking classloader is complicated: adding the classes to the appliction change the
* behavior of classloader, so this tst wont work. To make this work, all classes reinjected
* to the application would need to be renammed.
//Check the classloader
let mut current_classloader = classloader
.as_ref()
@ -848,6 +800,7 @@ fn gen_tester_method(
.find(|cl| cl.cname == *BOOT_CLASS_LOADER_TY)
};
}
*/
// Check Declaring Type
insns.append(&mut vec![
@ -1109,12 +1062,12 @@ fn gen_tester_method(
/// - `abort_label`: the label where to jump if the method does not match `id_method`.
/// - `tester_methods_class`: the class used to define the methods in `tester_methods`
/// - `tester_methods`: the methods used to test if a `java.lang.reflect.Method` is a specific method.
/// Methods are indexed by the IdMethod they detect, and have a name derived from the method
/// they detect.
/// Methods are indexed by the IdMethod they detect, and have a name derived from the method
/// they detect.
/// - `classloader`: is the runtime data of the classloader that loaded the class defining the
/// reflected method. If None, the classloader is not tested. Platform classes should probably
/// not be tested (the bootclassloader can be represented with a null reference, which may
/// lead to a null pointer exception).
/// reflected method. If None, the classloader is not tested. Platform classes should probably
/// not be tested (the bootclassloader can be represented with a null reference, which may
/// lead to a null pointer exception).
#[allow(clippy::too_many_arguments)]
fn test_method(
method_obj_reg: u16,
@ -1449,7 +1402,6 @@ fn get_cnstr_new_inst_block(
if ref_data.caller_method == IdMethod::from_smali("Lcom/example/theseus/dynandref/Main;->factoryInterface(Landroid/app/Activity;Ljava/lang/Class;ZBSCIJFD[Ljava/lang/String;)V").unwrap() {
ABORD_LABELS.lock().unwrap().entry(abort_label.clone()).or_default().push(ref_data.clone());
}
error!("abort_label: {abort_label}");
let classloader = if ref_data.constructor.class_.is_platform_class() {
None
@ -1510,11 +1462,11 @@ fn get_cnstr_new_inst_block(
/// - `abort_label`: the label where to jump if the method does not match `id_method`.
/// - `tester_methods_class`: the class used to define the methods in `tester_methods`
/// - `tester_methods`: the methods used to test if a `java.lang.reflect.Method` is a specific method.
/// Methods are indexed by the IdMethod they detect, and have a name derived from the method
/// they detect.
/// Methods are indexed by the IdMethod they detect, and have a name derived from the method
/// they detect.
/// - `classloader`: is the runtime data of the classloader that loaded the. If None, the classloader
/// is not tested. Platform classes should probably not be tested (the bootclassloader can be
/// represented with a null reference, which may lead to a null pointer exception).
/// is not tested. Platform classes should probably not be tested (the bootclassloader can be
/// represented with a null reference, which may lead to a null pointer exception).
#[allow(clippy::too_many_arguments)]
fn test_cnstr(
cnst_reg: u16,