Reworked Program To Support Analysing The "Cryptexes" Partition

Starting with macOS Ventura (13), Apple has made some changes to where the sharedcache is located. As a result, the program has been rewritten to support obtain symbols from multiple locations. A nice consequence of this change is that we now grab the symbols for DriverKit as well.

For anyone interested in more details about the cryptexes, i recommend readling the following article: https://threedots.ovh/blog/2022/06/a-quick-look-at-macos-rapid-security-response/

.gitignore

@@ -9,7 +9,7 @@ Cargo.lock
 # These are backup files generated by rustfmt
 **/*.rs.bk
 
-temp/
+tmp/
 
 #
 # macOS GitIgnore

src/argument.rs

@@ -1,46 +0,0 @@
-use std::path::{Path,PathBuf};
-use clap::{Parser};
-
-#[derive(Debug)]
-pub struct Arguments {
-    pub results_path: String,
-    pub base_path: String
-}
-
-#[derive(Parser)]
-#[command(version, author = "Thomas A.", about = "Extracts library symbols from Apple's framework")]
-struct RawArguments {
-    /// The normal root directory in macOS, iOS, etc.
-    /// If no argument is provided, the root path will be used.
-    #[arg(long, value_name = "PATH")]
-    standard_path: Option<String>,
-    /// Where the symbols will be saved at.
-    #[arg(value_name = "RESULT FOLDER")]
-    results_path: String
-}
-
-impl Arguments {
-    pub fn new() -> Arguments {
-        let raw_arguments = RawArguments::parse();
-        Self::into_arguments(raw_arguments)
-    }
-
-    fn into_arguments(raw_arguments: RawArguments) -> Arguments {
-        let base_path = raw_arguments.standard_path.unwrap_or(String::from("/"));
-
-        Arguments { 
-            results_path: raw_arguments.results_path, 
-            base_path
-        }
-    }
-
-    pub fn path_from_base<P: AsRef<Path>>(&self, location: P) -> PathBuf {
-        let base_path = Path::new(self.base_path.as_str());
-        base_path.join(location)
-    }
-
-    pub fn path_from_results<P: AsRef<Path>>(&self, location: P) -> PathBuf {
-        let results_path = Path::new(self.results_path.as_str());
-        results_path.join(location)
-    }
-}

src/arguments.rs

@@ -0,0 +1 @@
+pub mod cli;

src/arguments/cli.rs

@@ -0,0 +1,65 @@
+use std::path::{Path,PathBuf};
+use clap::{Parser};
+
+#[derive(Debug)]
+pub struct CliArguments {
+    pub results_path: PathBuf,
+    pub base_path: PathBuf,
+    pub cryptexes_os_path: Option<PathBuf>,
+}
+
+#[derive(Parser)]
+#[command(version, author = "Thomas A.", about = "Extracts library symbols from Apple's framework/libraries")]
+struct RawArguments {
+    /// The normal root directory in macOS, iOS, etc.
+    /// If no argument is provided, the root path will be used.
+    #[arg(long, value_name = "PATH")]
+    standard_path: Option<String>,
+    /// Path to cryptexes OS directory.
+    /// If no argument is provided, the program will first check
+    /// if "/System/Cryptexes/OS" exists, if it doesn't exist, the
+    /// option will be ignored.
+    #[arg(long, value_name = "PATH")]
+    cryptexes_os_path: Option<String>,
+    /// Where the symbols will be saved at.
+    #[arg(value_name = "RESULT FOLDER")]
+    results_path: String,
+}
+
+impl CliArguments {
+    pub fn new() -> CliArguments {
+        let raw_arguments = RawArguments::parse();
+        Self::into_arguments(raw_arguments)
+    }
+
+    fn into_arguments(raw_arguments: RawArguments) -> CliArguments {
+        let base_path = raw_arguments.standard_path.unwrap_or_else(|| {
+            println!("Standard path not provided. Falling back to root directory ('/')");
+            String::from("/")
+        });
+
+        let cryptexes_os_path = raw_arguments.cryptexes_os_path.or_else(|| {
+            let temp = String::from("/System/Cryptexes/OS");
+            let temp_path = Path::new(temp.as_str());
+
+            println!("Cryptexes OS path not provided. Checking if path '{}' exists", temp);
+            if temp_path.exists() {
+                println!("Found '{}' path", temp);
+                Some(temp)
+            } else {
+                println!("Unable to find '{}' path", temp);
+                None
+            }
+        });
+
+        let results_path =  PathBuf::from(raw_arguments.results_path);
+        let base_path = PathBuf::from(&base_path);
+        let cryptexes_os_path = cryptexes_os_path.map(|path| { PathBuf::from(path) });
+
+        CliArguments {
+            results_path, 
+            base_path,
+            cryptexes_os_path,
+        }
+    }
+}

src/clean.rs

@@ -2,18 +2,14 @@ use std::fs::remove_dir_all;
 
 use crate::location::ResultsLocation;
 
-pub struct Cleanup {}
-
-impl Cleanup {
-    pub fn remove_saved_symbols(results_locations: &ResultsLocation) {
-        if let Ok(_) = remove_dir_all(&results_locations.unique_version_path) {
-            println!("Deleted {:?}", results_locations.unique_version_path);
-        }
+pub fn remove_saved_symbols(results_locations: &ResultsLocation) {
+    if let Ok(_) = remove_dir_all(&results_locations.os_version_path) {
+        println!("Deleted {:?}", results_locations.os_version_path);
     }
+}
 
-    pub fn remove_temp(results_locations: &ResultsLocation) {
+pub fn remove_temp(results_locations: &ResultsLocation) {
     if let Ok(_) = remove_dir_all(&results_locations.temp_path) {
         println!("Cleaned up temp data");
     }
-    }
 }

src/location.rs

@@ -1,9 +1,11 @@
+pub mod system;
+
 use std::fs::{read_dir, ReadDir};
 use std::iter::Enumerate;
 use std::path::{Path,PathBuf};
 
-use crate::argument::Arguments;
-use crate::program::SystemVersionDefaults;
+use crate::arguments::cli::{CliArguments};
+use crate::program::{SystemVersionDefaults};
 
 pub(crate) fn walk_directory<P: AsRef<Path>>(location: P, valid_file: fn(&PathBuf) -> bool) -> Vec<PathBuf> {
     let mut current_directory: Vec<Enumerate<ReadDir>> = Vec::new();
@@ -40,53 +42,25 @@ pub(crate) fn walk_directory<P: AsRef<Path>>(location: P, valid_file: fn(&PathBu
 }
 
 
-#[derive(Debug)]
-pub struct BaseLocation {
-    pub system_version_path: PathBuf,
-    pub dyld_shardcache_macos_path: PathBuf,
-    pub dyld_shardcache_iphoneos_path: PathBuf,
-}
-
-impl BaseLocation {
-    pub fn new(arguments: &Arguments) -> BaseLocation {     
-        let system_version_path = Path::new("System/Library/CoreServices/SystemVersion");
-        let dyld_shardcache_macos =  Path::new("System/Library/dyld");
-        let dyld_shardcache_iphoneos = Path::new("System/Library/Caches/com.apple.dyld");
-
-        BaseLocation {
-            system_version_path: arguments.path_from_base(system_version_path),
-            dyld_shardcache_macos_path: arguments.path_from_base(dyld_shardcache_macos),
-            dyld_shardcache_iphoneos_path: arguments.path_from_base(dyld_shardcache_iphoneos),
-        }
-    }
-}
-
 #[derive(Debug)]
 pub struct ResultsLocation {
-    pub shared_cache_path: PathBuf,
-    pub unique_version_path: PathBuf,
+    pub os_version_path: PathBuf,
     pub temp_path: PathBuf,
-    pub temp_shared_cache_path: PathBuf
 }
 
 impl ResultsLocation {
-    pub fn new(arguments: &Arguments, system_version: &SystemVersionDefaults) -> ResultsLocation {
-        const SHARED_CACHE_DIR: &str = "shared_cache";
-        const TEMP_DIR: &str = "temp";
+    pub fn new(arguments: &CliArguments, system_version: SystemVersionDefaults) -> ResultsLocation {
+        const TEMP_DIR: &str = "tmp";
 
         let version_folder = format!("{} ({})", system_version.product_version, system_version.product_build_version);
         let system_version = &system_version.product_name;
-        let unique_version_path = arguments.path_from_results(Path::new(system_version.as_str())).join(version_folder);
-        let shared_cache_path = unique_version_path.join(SHARED_CACHE_DIR);
         
-        let temp_path =  unique_version_path.join(TEMP_DIR);
-        let temp_shared_cache_path = temp_path.join(SHARED_CACHE_DIR);
+        let os_version_path = arguments.results_path.as_path().join(system_version).join(version_folder);
+        let temp_path =  os_version_path.join(TEMP_DIR);
 
-        ResultsLocation {
-            shared_cache_path,
-            unique_version_path,
+        Self {
+            os_version_path,
             temp_path,
-            temp_shared_cache_path
         }
     }
 }

src/location/system.rs

@@ -0,0 +1,174 @@
+use std::{path::{PathBuf, Path}, fs::{read_dir, ReadDir}, collections::{VecDeque}};
+
+use crate::{arguments::cli::CliArguments, program::DyldSharedCacheExtractor};
+
+use super::ResultsLocation;
+
+const SYSTEM_FOLDER_BLACKLIST: [&str; 5] = ["Cryptexes","Library","Developer","Applications","Volumes"];
+
+// where we searched for the library files (either directly on the filesystem
+// or extracted from a sharedcache container).
+pub const STANDARD_DIR: &str = "standard";
+pub const SHAREDCACHE_DIR: &str = "sharedcache";
+#[derive(Debug)]
+pub enum SymbolsLocationType {
+    Standard,
+    SharedCache,
+    Unknown
+}
+
+// The filesystem for where we will start the search.
+const ROOT_DIR: &str = "root";
+const CRYPTEXES_DIR: &str = "cryptexes";
+#[derive(Debug)]
+pub enum VolumeType {
+    Root,
+    Cryptexes,
+    Unknown
+}
+
+#[derive(Debug)]
+pub struct SystemPathParser {
+    pub save_path: PathBuf,
+    pub symbol_folders: Vec<PathBuf>,
+}
+
+impl SystemPathParser {
+    pub fn new(arguments: &CliArguments, results_location: &ResultsLocation) -> Vec<SystemPathParser> {
+        let mut parser_paths: Vec<SystemPathParser> = Vec::new();
+
+        parser_paths.append(&mut Self::new_from_filesystem(ROOT_DIR,results_location,&arguments.base_path));
+        if let Some(cryptexes_os_path) = &arguments.cryptexes_os_path {
+            parser_paths.append(&mut Self::new_from_filesystem(CRYPTEXES_DIR,results_location,cryptexes_os_path));
+        }
+
+        parser_paths
+    }
+
+    pub fn breakdown_save_path(&self) -> (SymbolsLocationType,VolumeType) {
+        let mut components = self.save_path.components();
+
+        let symbol_location = if let Some(symbol_location_path) = components.next() {
+            let symbol_location_path = symbol_location_path.as_os_str();
+            if symbol_location_path == STANDARD_DIR {
+                SymbolsLocationType::Standard
+            } else if symbol_location_path == SHAREDCACHE_DIR {
+                SymbolsLocationType::SharedCache
+            } else {
+                SymbolsLocationType::Unknown
+            }
+        } else { SymbolsLocationType::Unknown };
+
+        let volume = if let Some(volume_path) = components.next() {
+            let volume_path = volume_path.as_os_str();
+            if volume_path == ROOT_DIR {
+                VolumeType::Root
+            } else if volume_path == CRYPTEXES_DIR {
+                VolumeType::Cryptexes
+            } else {
+                VolumeType::Unknown
+            }
+        } else { VolumeType::Unknown };
+
+        (symbol_location,volume)
+    }
+
+    fn new_from_filesystem<P: AsRef<Path>>(filesystem_identifier: &str, results_location: &ResultsLocation, filesystem_path: &P) -> Vec<SystemPathParser> {
+        let mut parser_paths: Vec<SystemPathParser> = Vec::new();
+        let save_path = Path::new(STANDARD_DIR).join(filesystem_identifier);
+        let mut paths_to_sharedcache = Self::create_system_path_parser(&mut parser_paths,filesystem_path,save_path);
+
+        while !paths_to_sharedcache.is_empty() {
+            if let Some(sharedcache_folder) = paths_to_sharedcache.pop_front() {
+                
+                if let Ok(relative_path) = sharedcache_folder.strip_prefix(&filesystem_path) {
+                    let system_identifier = 
+                        if relative_path.starts_with("System/DriverKit") {"driverkit"}
+                        else if relative_path.starts_with("System/Library") {"library"}
+                        else { panic!("Unexpected filepath {:?}", relative_path) };
+
+                    let save_path = Path::new(SHAREDCACHE_DIR).join(filesystem_identifier).join(system_identifier);
+                    let sharedcache_extracted_path = results_location.temp_path.join(save_path.as_os_str());
+                    let dyld_shared_cache_extractor = DyldSharedCacheExtractor::new(&sharedcache_extracted_path, &sharedcache_folder);
+        
+                    for extracted_path in dyld_shared_cache_extractor.extracted_paths {
+                        let save_path = save_path.join(extracted_path.as_path().file_name().unwrap());
+                        let unexpected_sharedcache_locations = Self::create_system_path_parser(&mut parser_paths,&extracted_path,save_path);
+                        assert!(unexpected_sharedcache_locations.is_empty(),"Unexpected sharedcache files");
+                    }
+
+                }
+
+            }
+        }
+
+        parser_paths
+    }
+
+    fn create_system_path_parser<P: AsRef<Path>>(parser_paths: &mut Vec<SystemPathParser>, filesystem_path: &P, save_path: PathBuf) ->  VecDeque<PathBuf>{
+        let mut paths_to_sharedcache: VecDeque<PathBuf> = VecDeque::new();
+        
+        let mut paths_to_analyse: VecDeque<PathBuf> = VecDeque::new();
+        let mut symbol_folders: Vec<PathBuf> = Vec::new();
+        paths_to_analyse.push_back(PathBuf::from(filesystem_path.as_ref()));
+        while !paths_to_analyse.is_empty() {
+            if let Some(path) = paths_to_analyse.pop_front() {
+                Self::append_path_if_exists(&mut symbol_folders,&path,"usr/lib");
+
+                let system_path = path.join("System");
+                if system_path.exists() {
+                    Self::append_path_if_exists(&mut symbol_folders,&system_path,"Library/Frameworks");
+                    Self::append_path_if_exists(&mut symbol_folders,&system_path,"Library/PrivateFrameworks");
+    
+                    let system_folders = read_dir(&system_path).unwrap();
+                    Self::analyse_system_subfolders(system_folders,&mut paths_to_analyse);
+
+                    if let Some(sharedcache_folder) = Self::determine_sharedcache_folder(&system_path) {
+                        paths_to_sharedcache.push_back(sharedcache_folder)
+                    };
+                }
+            }
+        }
+
+        
+        parser_paths.push(SystemPathParser { save_path, symbol_folders });
+
+        return paths_to_sharedcache;
+    }
+
+    fn append_path_if_exists<P: AsRef<Path>>(list_of_path: &mut Vec<PathBuf>, path: &P, path_to_append: &str) {
+        let evaluate_path = path.as_ref().join(path_to_append);
+        if evaluate_path.exists() { list_of_path.push(evaluate_path) }
+    }
+
+    fn determine_sharedcache_folder<P: AsRef<Path>>(path: &P) -> Option<PathBuf> {
+        let mut dyld_shardcache_path: Option<PathBuf> = None;
+        let dyld_shardcache_macos =  path.as_ref().join(Path::new("Library/dyld"));
+        let dyld_shardcache_iphoneos = path.as_ref().join(Path::new("Library/Caches/com.apple.dyld"));
+
+        let mut found_paths: u8 = 0;
+        found_paths += if dyld_shardcache_macos.exists() {1} else {0};
+        found_paths += if dyld_shardcache_iphoneos.exists() {1} else {0};
+        assert!(found_paths <= 1, "Both {dyld_shardcache_macos:?} and {dyld_shardcache_iphoneos:?} exist");
+
+        if dyld_shardcache_macos.exists() {
+            dyld_shardcache_path = Some(dyld_shardcache_macos)
+        } else if dyld_shardcache_iphoneos.exists() {
+            dyld_shardcache_path = Some(dyld_shardcache_iphoneos)
+        }
+        
+        return dyld_shardcache_path;
+    }
+
+    fn analyse_system_subfolders(system_folders: ReadDir, paths_to_sharedcache: &mut VecDeque<PathBuf>) {
+        for system_folder in system_folders {
+            let system_folder = system_folder.unwrap();
+            let folder_name = system_folder.file_name();
+            let file_type = system_folder.file_type().unwrap();
+
+            if !SYSTEM_FOLDER_BLACKLIST.contains(&folder_name.to_str().unwrap()) && file_type.is_dir() {
+                paths_to_sharedcache.push_back(system_folder.path());
+            }
+        }
+    }
+}

src/main.rs

@@ -1,48 +1,96 @@
-mod argument;
+mod arguments;
 mod clean;
 mod location;
 mod program;
 mod symbols;
 
-use std::path::Path;
+use std::{path::{Path, PathBuf}, fs::{File, create_dir_all}, io::Write};
 
-fn analyse_system_path<P: AsRef<Path>,Q: AsRef<Path>>(path: &P, whoami_username: &program::WhoAmIUserName, result_location: &Q, unique_folder :Option<&str>) {
-    let parse_filesystem_symbols_list = symbols::ParseBaseFilesystem::new(path);
-    for parse_filesystem_symbols in parse_filesystem_symbols_list {
-        parse_filesystem_symbols.traverse(result_location, unique_folder, path, &whoami_username);
+use location::system::SystemPathParser;
+
+#[derive(Debug)]
+struct GlobalMainVariables {
+    arguments: arguments::cli::CliArguments,
+    system_path_parser: Vec<location::system::SystemPathParser>,
+    results_location: location::ResultsLocation,
+    whoami_username: program::WhoAmIUserName,
+}
+
+impl GlobalMainVariables {
+    pub fn new() -> GlobalMainVariables {
+        let arguments = arguments::cli::CliArguments::new();
+        let system_version_path = arguments.base_path.join(Path::new("System/Library/CoreServices/SystemVersion.plist"));
+
+        assert!(system_version_path.exists(), "Unable to find SystemVersion.plist");
+        
+        let system_version = program::SystemVersionDefaults::new(system_version_path.to_str().unwrap());
+        let whoami_username = program::WhoAmIUserName::new();
+        let results_location = location::ResultsLocation::new(&arguments, system_version);
+
+        clean::remove_saved_symbols(&results_location);
+
+        let system_path_parser = location::system::SystemPathParser::new(&arguments, &results_location);
+
+        GlobalMainVariables { 
+            arguments,
+            system_path_parser,
+            results_location,
+            whoami_username,
+        }
+    }
+
+    pub fn parse_for_symbols(&self) {
+        for path_to_parse in &self.system_path_parser {
+            let filesystem_path = Self::determine_filesystem_path(&self, path_to_parse);
+            for symbol_folder in &path_to_parse.symbol_folders {
+                let macho_executables = location::walk_directory(symbol_folder, symbols::macho::is_file_macho);
+                for macho_executable in macho_executables {
+                    let relative_path = macho_executable.strip_prefix(&filesystem_path).unwrap().parent().unwrap();
+                    let macho_executable_file_name = format!{"{}.symboldir",macho_executable.file_name().unwrap().to_str().unwrap()};
+                    let macho_executable_dir = self.results_location.os_version_path.join(&path_to_parse.save_path).join(relative_path).join(macho_executable_file_name);
+                    create_dir_all(&macho_executable_dir).unwrap();
+
+                    let nm_program = program::NmLibrarySymbols::new(&macho_executable);
+                    let mut nm_output_file = File::create(macho_executable_dir.join("nm.txt")).unwrap();
+                    nm_output_file.write_all(nm_program.raw_output.as_bytes()).expect("Unable to save `nm` output");
+
+                    let otool_program = program::OtoolLibrarySymbols::new(&macho_executable, &self.whoami_username);
+                    let mut otool_output_file = File::create(macho_executable_dir.join("otool.txt")).unwrap();
+                    otool_output_file.write_all(otool_program.raw_output.as_bytes()).expect("Unable to save `otool` output");
+                }
+            }
+        }
+    }
+
+    fn determine_filesystem_path(&self, path_to_parse: &SystemPathParser) -> PathBuf{
+        let (symbol_location,volume) = path_to_parse.breakdown_save_path();
+
+        let arguments = &self.arguments;
+        let results_location = &self.results_location;
+        let starting_path = match symbol_location {
+            location::system::SymbolsLocationType::Standard => {
+                match volume {
+                    location::system::VolumeType::Root => { arguments.base_path.clone() }
+                    location::system::VolumeType::Cryptexes => { arguments.cryptexes_os_path.clone().unwrap() }
+                    location::system::VolumeType::Unknown => { panic!("Unknown volumn location detected"); }
+                }
+            }
+            location::system::SymbolsLocationType::SharedCache => { 
+                results_location.temp_path.join(&path_to_parse.save_path)
+            }
+            location::system::SymbolsLocationType::Unknown => { panic!("Unknown symbol location detected"); }
+        };
+
+        starting_path
+    }
+
+    pub fn clean(&self) {
+        clean::remove_temp(&self.results_location);
     }
 }
 
 fn main() {
-    let arguments = argument::Arguments::new();
-    let base_locations = location::BaseLocation::new(&arguments);
-
-    let system_version = program::SystemVersionDefaults::new(base_locations.system_version_path.to_str().unwrap());
-    let results_location = location::ResultsLocation::new(&arguments, &system_version);
-    let whoami_username = program::WhoAmIUserName::new();
-
-    clean::Cleanup::remove_saved_symbols(&results_location);
-
-    let dyld_shared_cache_extractor = program::DyldSharedCacheExtractor::new(&base_locations, &results_location);
-    
-    for path in dyld_shared_cache_extractor.extracted_paths.iter() {
-        let shared_cache_folder = path.as_path().file_name().expect("Unable to obtain shared cache folder name").to_str();
-        analyse_system_path(path,&whoami_username,&results_location.shared_cache_path,shared_cache_folder);
-    }
-    clean::Cleanup::remove_temp(&results_location);
-
-    {
-        let path = Path::new(arguments.base_path.as_str());
-        let unique_folder = Some("standard");
-        analyse_system_path(&path,&whoami_username,&results_location.unique_version_path,unique_folder);
-        clean::Cleanup::remove_temp(&results_location);
-    }
-
-
-    println!{"{:#?}",arguments}
-    println!{"{:#?}",system_version}
-    println!{"{:#?}",base_locations}
-    println!{"{:#?}",results_location}
-    println!{"{:#?}",dyld_shared_cache_extractor}
-    println!("{:#?}",whoami_username)
+    let execution: GlobalMainVariables = GlobalMainVariables::new();
+    execution.parse_for_symbols();
+    execution.clean();
 }

src/program.rs

@@ -1,6 +1,6 @@
-use std::{process::{Command, Output}, fs::{read_dir, ReadDir, File}, path::{Path, PathBuf}, io::Read};
+use std::{process::{Command, Output}, fs::{read_dir, ReadDir}, path::{Path, PathBuf}};
 
-use crate::location::{BaseLocation, ResultsLocation};
+use crate::{symbols::macho::is_file_dyld_sharedcache};
 
 fn parse_stdout(output: Output) -> Vec<String> {
     let raw_string = String::from_utf8(output.stdout).expect("Unable to save output");
@@ -53,36 +53,31 @@ pub struct DyldSharedCacheExtractor {
 }
 
 impl DyldSharedCacheExtractor {
-    pub fn new(base_location: &BaseLocation, results_location: &ResultsLocation) -> DyldSharedCacheExtractor {
+    pub fn new<P: AsRef<Path>, Q: AsRef<Path>>(sharedcache_extracted_path: &Q, dyld_sharedcache_folder: &P) -> DyldSharedCacheExtractor {
         let mut instance =  DyldSharedCacheExtractor {
             extracted_paths: Vec::new()
         };
 
-        if let Ok(read_dir) = read_dir(&base_location.dyld_shardcache_macos_path) {
-            println!("Inspecting {:?} for shared cache", base_location.dyld_shardcache_macos_path);
-            instance.extract_shared_library(results_location,read_dir);
-        }
-
-        if let Ok(read_dir) = read_dir(&base_location.dyld_shardcache_iphoneos_path) {
-            println!("Inspecting {:?} for shared cache", base_location.dyld_shardcache_iphoneos_path);
-            instance.extract_shared_library(results_location,read_dir);
+        if let Ok(sharedcache_readdir) = read_dir(dyld_sharedcache_folder) {
+            println!("Inspecting {:?} directory for shared cache", dyld_sharedcache_folder.as_ref());
+            instance.extract_shared_library(sharedcache_extracted_path,sharedcache_readdir);
         }
 
         instance
     }
 
-    fn extract_shared_library(&mut self, results_location: &ResultsLocation, read_dir: ReadDir) {
-        for dir_entry in read_dir {
-            let dir_entry = dir_entry.unwrap();
-            let file_path = dir_entry.path();
+    fn extract_shared_library<P: AsRef<Path>>(&mut self, sharedcache_extracted_path: &P, sharedcache_readdir: ReadDir) {
+        for sharedcache_direntry in sharedcache_readdir {
+            let sharedcache_direntry = sharedcache_direntry.unwrap();
+            let sharedcache_file_path = sharedcache_direntry.path();
 
-            if self.is_shared_cache_file(file_path.as_path()) {
-                let filename = file_path.as_path().file_name().expect("Unable to get file name");
-                let temp_path = results_location.temp_shared_cache_path.join(filename);
-                DyldSharedCacheExtractor::launch_program(file_path.as_path(), &temp_path);
+            if is_file_dyld_sharedcache(sharedcache_file_path.as_path()) {
+                let file_name = sharedcache_file_path.file_name().unwrap();
+                let temp_path = sharedcache_extracted_path.as_ref().join(&format!("{}.dir",file_name.to_str().unwrap()));
 
                 // If the path doesn't exist after `dyld-shared-cache-extractor` finishes executing, it means that
                 // the application was not able to extract anything from it.
+                DyldSharedCacheExtractor::launch_program(sharedcache_file_path.as_path(), &temp_path);
                 if temp_path.is_dir() {
                     self.extracted_paths.push(temp_path);
                 }
@@ -90,19 +85,6 @@ impl DyldSharedCacheExtractor {
         }
     }
 
-    fn is_shared_cache_file(&self, file_path: &Path) -> bool {
-        if file_path.is_file() {
-            if let Ok(mut file) = File::open(file_path) {
-                let mut magic: [u8; 5] = [0; 5];
-                if let Ok(_) = file.read(&mut magic) {
-                    return [b'd',b'y',b'l',b'd',b'_'] == magic;
-                }
-            }
-        }
-
-        return false
-    }
-
     fn launch_program(shared_cache_path: &Path, temp_path: &Path) {
         let _ = Command::new("dyld-shared-cache-extractor")
             .args([shared_cache_path, temp_path])

src/symbols.rs

@@ -1,110 +1 @@
-use std::{path::{PathBuf, Path}, fs::{File, self}, io::{Read, Write}};
-
-use crate::{location, program};
-
-const SYSTEM_LIBRARY_FRAMEWORK_PATH: &str = "System/Library/Frameworks";
-const SYSTEM_LIBRARY_PRIVATEFRAMEWORK_PATH: &str = "System/Library/PrivateFrameworks";
-const USR_LIB_PATH: &str = "usr/lib";
-const SYSTEM_IOSSUPPORT: &str = "System/iOSSupport";
-
-const MACHO_32BIT_MH_MAGIC: u32 = 0xfeedface;
-const MACHO_32BIT_MH_CIGAM: u32 = 0xcefaedfe;
-const MACHO_64BIT_MH_MAGIC: u32 = 0xfeedfacf;
-const MACHO_64BIT_MH_CIGAM: u32 = 0xcffaedfe;
-const MACHO_FAT_MAGIC: u32 = 0xcafebabe;
-const MACHO_FAT_CIGAM: u32 = 0xbebafeca;
-
-fn is_file_macho(path: &PathBuf) -> bool {
-    if !path.is_file() {
-        return false
-    }
-
-    let macho_filetype: u32;
-    if let Ok(mut file) = File::open(path) {
-        let mut temp_buf: [u8; 4] = [0; 4];
-        if let Ok(size) = file.read(&mut temp_buf) {
-            if size != 4 { return false; }
-        }
-        macho_filetype = u32::from_le_bytes(temp_buf);
-    } else {
-        return false;
-    }
-
-    let macho_32bit: bool;
-    let macho_64bit: bool;
-    let macho_fat: bool;
-
-    macho_32bit = macho_filetype == MACHO_32BIT_MH_MAGIC 
-        || macho_filetype == MACHO_32BIT_MH_CIGAM;
-    macho_64bit = macho_filetype == MACHO_64BIT_MH_MAGIC 
-        || macho_filetype == MACHO_64BIT_MH_CIGAM;
-    macho_fat = macho_filetype == MACHO_FAT_MAGIC 
-        || macho_filetype == MACHO_FAT_CIGAM;
-
-    macho_32bit || macho_64bit || macho_fat
-}
-
-pub struct ParseBaseFilesystem {
-    framework_path: PathBuf,
-    privateframework_path: PathBuf,
-    usr_lib_path: PathBuf
-}
-
-const NM_TEXTFILE_NAME: &str = "nm.txt";
-const OTOOL_TEXTFILE_NAME: &str = "otool.txt";
-
-impl ParseBaseFilesystem {
-    pub fn new<P: AsRef<Path>>(location: &P) -> Vec<ParseBaseFilesystem> {
-        let mut base_filesystems: Vec<ParseBaseFilesystem> = Vec::new();
-        base_filesystems.push(ParseBaseFilesystem::build_parse_base_filesystem(location));
-        
-        let iossupport_path = location.as_ref().join(SYSTEM_IOSSUPPORT);
-        if iossupport_path.is_dir() {
-            println!("Found iOSSupport Directory");
-            base_filesystems.push(ParseBaseFilesystem::build_parse_base_filesystem(iossupport_path));
-        }
-
-        base_filesystems
-    }
-
-    fn build_parse_base_filesystem<P: AsRef<Path>>(location: P) -> ParseBaseFilesystem {
-        let framework_path = location.as_ref().join(SYSTEM_LIBRARY_FRAMEWORK_PATH);
-        let privateframework_path = location.as_ref().join(SYSTEM_LIBRARY_PRIVATEFRAMEWORK_PATH);
-        let usr_lib_path = location.as_ref().join(USR_LIB_PATH);
-
-        ParseBaseFilesystem {
-            framework_path,
-            privateframework_path,
-            usr_lib_path
-        }
-    }
-
-    pub fn traverse<P: AsRef<Path>, Q: AsRef<Path>>(&self, result_location: P, unique_folder: Option<&str>, base_location: Q, whoami: &program::WhoAmIUserName) {
-        let mut macho_paths: Vec<PathBuf> = Vec::new();
-        macho_paths.append(&mut location::walk_directory(&self.framework_path, is_file_macho));
-        macho_paths.append(&mut location::walk_directory(&self.privateframework_path, is_file_macho));
-        macho_paths.append(&mut location::walk_directory(&self.usr_lib_path, is_file_macho));
-
-        let macho_paths = macho_paths;
-        for macho_path in macho_paths.iter() {
-            let relative_location = macho_path.strip_prefix(base_location.as_ref()).unwrap();
-            let result_dir: PathBuf = if let Some(unique_folder) = unique_folder {
-                result_location.as_ref().join(unique_folder).join(relative_location)
-            } else {
-                result_location.as_ref().join(relative_location)
-            };
-
-            println!("Parsing {:?}", macho_path);
-            fs::create_dir_all(&result_dir).expect("Unable to create directory");
-
-            let mut nm_textfile = File::create(result_dir.as_path().join(NM_TEXTFILE_NAME)).expect("Unable to create file");
-            let nm = program::NmLibrarySymbols::new(&macho_path);
-            nm_textfile.write(nm.raw_output.as_bytes()).expect("Unable to save log information into file");
-
-            let mut otool_textfile = File::create(result_dir.as_path().join(OTOOL_TEXTFILE_NAME)).expect("Unable to create file");
-            let otool = program::OtoolLibrarySymbols::new(&macho_path,whoami);
-            otool_textfile.write(otool.raw_output.as_bytes()).expect("Unable to save log information into file");
-
-        }
-    }
-}
+pub mod macho;

src/symbols/macho.rs

@@ -0,0 +1,54 @@
+use std::{path::Path, fs::File, io::Read};
+
+const MACHO_32BIT_MH_MAGIC: u32 = 0xfeedface;
+const MACHO_32BIT_MH_CIGAM: u32 = 0xcefaedfe;
+const MACHO_64BIT_MH_MAGIC: u32 = 0xfeedfacf;
+const MACHO_64BIT_MH_CIGAM: u32 = 0xcffaedfe;
+const MACHO_FAT_MAGIC: u32 = 0xcafebabe;
+const MACHO_FAT_CIGAM: u32 = 0xbebafeca;
+
+pub(crate) fn is_file_macho<P: AsRef<Path>>(path: &P) -> bool {
+    let path = path.as_ref();
+
+    if !path.is_file() {
+        return false
+    }
+
+    let macho_filetype: u32;
+    if let Ok(mut file) = File::open(path) {
+        let mut temp_buf: [u8; 4] = [0; 4];
+        if let Ok(size) = file.read(&mut temp_buf) {
+            if size != 4 { return false; }
+        }
+        macho_filetype = u32::from_le_bytes(temp_buf);
+    } else {
+        return false;
+    }
+
+    let macho_32bit: bool;
+    let macho_64bit: bool;
+    let macho_fat: bool;
+
+    macho_32bit = macho_filetype == MACHO_32BIT_MH_MAGIC 
+        || macho_filetype == MACHO_32BIT_MH_CIGAM;
+    macho_64bit = macho_filetype == MACHO_64BIT_MH_MAGIC 
+        || macho_filetype == MACHO_64BIT_MH_CIGAM;
+    macho_fat = macho_filetype == MACHO_FAT_MAGIC 
+        || macho_filetype == MACHO_FAT_CIGAM;
+
+    macho_32bit || macho_64bit || macho_fat
+}
+
+pub(crate) fn is_file_dyld_sharedcache(file_path: &Path) -> bool {
+    if file_path.is_file() {
+        if let Ok(mut file) = File::open(file_path) {
+            let mut magic: [u8; 5] = [0; 5];
+            if let Ok(_) = file.read(&mut magic) {
+                // The magic header for sharedcache is "dyld_"
+                return [b'd',b'y',b'l',b'd',b'_'] == magic;
+            }
+        }
+    }
+
+    return false
+}