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put all the dex swapping & resigning shenanigans in a function

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This commit is contained in:
Jean-Marie 'Histausse' Mineau 2024-02-01 17:09:12 +01:00
parent 86a028f0bd
commit cb34f76063
Signed by: histausse
GPG key ID: B66AEEDA9B645AD2
5 changed files with 160 additions and 73 deletions
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87
apk_frauder/src/main.rs
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@ -1,78 +1,19 @@
use apk_frauder::ZipFileReader;
use apk_frauder::ZipFileWriter;
use std::env;
use std::fs::File;
use std::process::Command;
fn main() {
// Remove previous generation
println!("Remove files from previous run");
Command::new("rm").arg("app-striped.apk").status().unwrap();
Command::new("rm")
.arg("app-instrumented.apk")
.status()
.unwrap();
Command::new("rm")
.arg("app-instrumented-signed.apk")
.status()
.unwrap();
Command::new("rm")
.arg("app-instrumented-aligned.apk")
.status()
.unwrap();
println!("Read the headers of the existing dex file and strip the apk signature and dex files");
let file = File::open("app-release.apk").expect("failed to open file");
let mut apk = ZipFileReader::new(file);
let mut file_info_ref = (*apk.get_classes_file_info().first().unwrap()).clone();
apk.unlink_signature_files();
apk.unlink_bytecode_files();
let out_file = File::create("app-striped.apk").expect("failed to create file");
let mut apk_out = ZipFileWriter::new(out_file, apk.zip64_end_of_central_directory.clone());
for f in apk.files.clone() {
apk_out.insert_file_from_zip(f, &mut apk);
}
apk_out.write_central_directory();
println!("Insert the dex file to the stripped apk with the header of the original dex file");
let file = File::open("app-striped.apk").expect("failed to open file");
let mut bytecodes = File::open("classes.dex").expect("failed to open file");
let mut apk = ZipFileReader::new(file);
let out_file = File::create("app-instrumented.apk").expect("failed to create file");
let mut apk_out = ZipFileWriter::new(out_file, apk.zip64_end_of_central_directory.clone());
for f in apk.files.clone() {
apk_out.insert_file_from_zip(f, &mut apk);
}
file_info_ref.set_name("classes.dex");
apk_out.insert_file(
&mut bytecodes,
file_info_ref.header,
Some(file_info_ref.local_header),
apk_frauder::replace_dex(
"app-release.apk",
"app-instrumented.apk",
&mut [File::open("classes.dex").expect("failed to open file")],
"my-release-key.jks",
Some(&format!(
"{}/Android/Sdk/build-tools/34.0.0/zipalign",
env::var("HOME").expect("$HOME not set")
)),
Some(&format!(
"{}/Android/Sdk/build-tools/34.0.0/apksigner",
env::var("HOME").expect("$HOME not set")
)),
);
apk_out.write_central_directory();
println!("Align the apk");
// This could probably be performed by ourself
Command::new("/home/histausse/Android/Sdk/build-tools/34.0.0/zipalign")
.arg("-v")
.arg("-p")
.arg("4")
.arg("app-instrumented.apk")
.arg("app-instrumented-aligned.apk")
.status()
.unwrap();
println!("Sign the apk");
Command::new("/home/histausse/Android/Sdk/build-tools/34.0.0/apksigner")
.arg("sign")
.arg("--ks")
.arg("/home/histausse/AndroidStudioProjects/TestApplication/my-release-key.jks")
.arg("--out")
.arg("app-instrumented-signed.apk")
.arg("app-instrumented-aligned.apk")
.status()
.unwrap();
}