commit a91233aa125dd7954b0565705b2afc5776879635 · victor.earth/memmut

.gitignore

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+14

Cargo.toml

···

       1
       +
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       4
       +
       edition = "2024"

     

       5
       +
       

     

       6
       +
       [dependencies]

     

       7
       +
       anyhow = "1.0.96"

     

       8
       +
       clap = {version = "4.5.31", features = ["derive"]}

     

       9
       +
       env_logger = "0.11.6"

     

       10
       +
       libc = "0.2.170"

     

       11
       +
       log = "0.4.26"

     

       12
       +
       rand = "0.9.0"

     

       13
       +
       rayon = "1.10.0"

     

       14
       +
       rustyline = "15.0.0"

+129

examples/pointers.rs

···

       1
       +
       use rand::Rng;

     

       2
       +
       use std::{

     

       3
       +
           io::{self, Read, Write},

     

       4
       +
           sync::mpsc,

     

       5
       +
           thread,

     

       6
       +
           time::Duration,

     

       7
       +
       };

     

       8
       +
       

     

       9
       +
       // This is a practice program to test if the main programs behaviour works fine

     

       10
       +
       // This program has been validated and confirmed to work as expected with scanmem

     

       11
       +
       

     

       12
       +
       // Structure to hold the "real" game state

     

       13
       +
       struct GameState {

     

       14
       +
           // Internal values that control the actual game state

     

       15
       +
           values: Vec<i32>,

     

       16
       +
       }

     

       17
       +
       

     

       18
       +
       // Structure to manage what's displayed on screen

     

       19
       +
       struct GameDisplay {

     

       20
       +
           // Pointers to copies of values shown to the player

     

       21
       +
           display_values: Vec<Box<i32>>,

     

       22
       +
       }

     

       23
       +
       

     

       24
       +
       impl GameState {

     

       25
       +
           fn new(count: usize, rng: &mut impl Rng) -> Self {

     

       26
       +
               let mut values = Vec::with_capacity(count);

     

       27
       +
               for _ in 0..count {

     

       28
       +
                   values.push(rng.gen_range(1..10));

     

       29
       +
               }

     

       30
       +
               Self { values }

     

       31
       +
           }

     

       32
       +
       

     

       33
       +
           fn get_value(&self, index: usize) -> i32 {

     

       34
       +
               self.values[index]

     

       35
       +
           }

     

       36
       +
       

     

       37
       +
           fn set_value(&mut self, index: usize, value: i32) {

     

       38
       +
               self.values[index] = value;

     

       39
       +
           }

     

       40
       +
       }

     

       41
       +
       

     

       42
       +
       impl GameDisplay {

     

       43
       +
           fn new(count: usize) -> Self {

     

       44
       +
               let mut display_values = Vec::with_capacity(count);

     

       45
       +
               for _ in 0..count {

     

       46
       +
                   display_values.push(Box::new(0));

     

       47
       +
               }

     

       48
       +
               Self { display_values }

     

       49
       +
           }

     

       50
       +
       

     

       51
       +
           fn update_from_state(&mut self, state: &GameState) {

     

       52
       +
               for (i, val) in state.values.iter().enumerate() {

     

       53
       +
                   *self.display_values[i] = *val;

     

       54
       +
               }

     

       55
       +
           }

     

       56
       +
       

     

       57
       +
           fn get_display_ptr(&self, index: usize) -> *const i32 {

     

       58
       +
               &*self.display_values[index] as *const i32

     

       59
       +
           }

     

       60
       +
       

     

       61
       +
           fn get_displayed_value(&self, index: usize) -> i32 {

     

       62
       +
               *self.display_values[index]

     

       63
       +
           }

     

       64
       +
       }

     

       65
       +
       

     

       66
       +
       fn main() {

     

       67
       +
           let mut rng = rand::thread_rng();

     

       68
       +
       

     

       69
       +
           const LEN: usize = 10;

     

       70
       +
       

     

       71
       +
           let mut game_state = GameState::new(LEN, &mut rng);

     

       72
       +
           let mut game_display = GameDisplay::new(LEN);

     

       73
       +
       

     

       74
       +
           game_display.update_from_state(&game_state);

     

       75
       +
       

     

       76
       +
           let (tx, rx) = mpsc::channel();

     

       77
       +
       

     

       78
       +
           thread::spawn(move || {

     

       79
       +
               let mut buffer = [0; 1];

     

       80
       +
               loop {

     

       81
       +
                   if let Ok(_) = io::stdin().read_exact(&mut buffer) {

     

       82
       +
                       let _ = tx.send(());

     

       83
       +
                   }

     

       84
       +
               }

     

       85
       +
           });

     

       86
       +
       

     

       87
       +
           let mut refresh_counter = 0;

     

       88
       +
       

     

       89
       +
           loop {

     

       90
       +
               print!("\x1B[2J\x1B[1;1H");

     

       91
       +
       

     

       92
       +
               refresh_counter += 1;

     

       93
       +
               if refresh_counter >= 3 {

     

       94
       +
                   refresh_counter = 0;

     

       95
       +
                   game_display.update_from_state(&game_state);

     

       96
       +
                   println!("(Display refreshed from game state)");

     

       97
       +
               }

     

       98
       +
       

     

       99
       +
               println!(

     

       100
       +
                   "Memory Scanner Target (Realistic Game Structure) - Press ENTER for new values, Ctrl+C to quit"

     

       101
       +
               );

     

       102
       +
               println!("Displayed values (what you see on screen):");

     

       103
       +
       

     

       104
       +
               for i in 0..LEN {

     

       105
       +
                   let display_value = game_display.get_displayed_value(i);

     

       106
       +
                   let display_ptr = game_display.get_display_ptr(i);

     

       107
       +
                   println!(

     

       108
       +
                       "Value {}: {} (displayed at {:p})",

     

       109
       +
                       i, display_value, display_ptr

     

       110
       +
                   );

     

       111
       +
               }

     

       112
       +
       

     

       113
       +
               println!("\nInternal game state (would be hidden in a real game):");

     

       114
       +
               for i in 0..LEN {

     

       115
       +
                   println!("Value {}: {}", i, game_state.get_value(i));

     

       116
       +
               }

     

       117
       +
       

     

       118
       +
               println!("\nPress ENTER to change all values...");

     

       119
       +
               io::stdout().flush().unwrap();

     

       120
       +
       

     

       121
       +
               if rx.recv_timeout(Duration::from_secs(1)).is_ok() {

     

       122
       +
                   for i in 0..LEN {

     

       123
       +
                       game_state.set_value(i, rng.gen_range(1..10));

     

       124
       +
                   }

     

       125
       +
                   game_display.update_from_state(&game_state);

     

       126
       +
                   refresh_counter = 0;

     

       127
       +
               }

     

       128
       +
           }

     

       129
       +
       }

+55

examples/simple.rs

···

       1
       +
       use rand::Rng;

     

       2
       +
       use std::{

     

       3
       +
           io::{self, Read, Write},

     

       4
       +
           sync::mpsc,

     

       5
       +
           thread,

     

       6
       +
           time::Duration,

     

       7
       +
       };

     

       8
       +
       

     

       9
       +
       // This is a practice program to test if the main programs behaviour works fine

     

       10
       +
       // This program has been validated and confirmed to work as expected with scanmem

     

       11
       +
       

     

       12
       +
       fn main() {

     

       13
       +
           let mut rng = rand::rng();

     

       14
       +
       

     

       15
       +
           // Create an array of 10 random numbers

     

       16
       +
           // const LEN: usize = 10_000_000;

     

       17
       +
           const LEN: usize = 1000;

     

       18
       +
       

     

       19
       +
           let mut numbers: Vec<i32> = vec![0; LEN];

     

       20
       +
       

     

       21
       +
           for i in 0..LEN {

     

       22
       +
               numbers[i] = rng.random_range(1..10);

     

       23
       +
           }

     

       24
       +
       

     

       25
       +
           let (tx, rx) = mpsc::channel();

     

       26
       +
       

     

       27
       +
           thread::spawn(move || {

     

       28
       +
               let mut buffer = [0; 1];

     

       29
       +
               loop {

     

       30
       +
                   if let Ok(_) = io::stdin().read_exact(&mut buffer) {

     

       31
       +
                       let _ = tx.send(());

     

       32
       +
                   }

     

       33
       +
               }

     

       34
       +
           });

     

       35
       +
       

     

       36
       +
           loop {

     

       37
       +
               print!("\x1B[2J\x1B[1;1H");

     

       38
       +
       

     

       39
       +
               println!("Memory Scanner Target - Press ENTER for new values, Ctrl+C to quit");

     

       40
       +
               println!("Current values:");

     

       41
       +
       

     

       42
       +
               for (i, &num) in numbers.iter().take(10).enumerate() {

     

       43
       +
                   println!("Index {}: {}", i, num);

     

       44
       +
               }

     

       45
       +
       

     

       46
       +
               println!("\nPress ENTER to generate new values...");

     

       47
       +
               io::stdout().flush().unwrap();

     

       48
       +
       

     

       49
       +
               if rx.recv_timeout(Duration::from_secs(1)).is_ok() {

     

       50
       +
                   for i in 0..LEN {

     

       51
       +
                       numbers[i] = rng.random_range(1..10);

     

       52
       +
                   }

     

       53
       +
               }

     

       54
       +
           }

     

       55
       +
       }

projectory.toml

···

       1
       +
       name = "memmut"

     

       2
       +
       description = "scanmem alternative with concurrent memory scanning"

     

       3
       +
       tags = ["cli", "utility"]

     

       4
       +
       langs = ["rust"]

+118

src/cli.rs

···

       1
       +
       use anyhow::Result;

     

       2
       +
       use rustyline::Editor;

     

       3
       +
       use rustyline::error::ReadlineError;

     

       4
       +
       

     

       5
       +
       use crate::process::Process;

     

       6
       +
       use crate::scanner::{MemoryScanner, ScanValueType};

     

       7
       +
       

     

       8
       +
       pub fn run_interactive_mode(process_name: &str) -> Result<()> {

     

       9
       +
           println!(

     

       10
       +
               "# Scanning for process \"{}\" like how pgrep -f works",

     

       11
       +
               process_name

     

       12
       +
           );

     

       13
       +
       

     

       14
       +
           let process = Process::find_by_name(process_name)?;

     

       15
       +
           let mut scanner = MemoryScanner::new(process)?;

     

       16
       +
       

     

       17
       +
           println!("Please enter current value, or \"help\" for other commands.");

     

       18
       +
       

     

       19
       +
           let mut rl = Editor::<(), rustyline::history::DefaultHistory>::new()?;

     

       20
       +
           let mut first_scan = true;

     

       21
       +
       

     

       22
       +
           loop {

     

       23
       +
               let prompt = if first_scan {

     

       24
       +
                   "> ".to_string()

     

       25
       +
               } else {

     

       26
       +
                   format!("{}> ", scanner.get_matches_count())

     

       27
       +
               };

     

       28
       +
       

     

       29
       +
               let readline = rl.readline(&prompt);

     

       30
       +
               match readline {

     

       31
       +
                   Ok(line) => {

     

       32
       +
                       let _ = rl.add_history_entry(&line);

     

       33
       +
                       let line = line.trim();

     

       34
       +
       

     

       35
       +
                       if line.is_empty() {

     

       36
       +
                           continue;

     

       37
       +
                       }

     

       38
       +
       

     

       39
       +
                       if line == "help" {

     

       40
       +
                           print_help();

     

       41
       +
                           continue;

     

       42
       +
                       }

     

       43
       +
       

     

       44
       +
                       if line == "exit" || line == "quit" {

     

       45
       +
                           break;

     

       46
       +
                       }

     

       47
       +
       

     

       48
       +
                       if line.starts_with("set ") {

     

       49
       +
                           handle_set_command(&mut scanner, line)?;

     

       50
       +
                           continue;

     

       51
       +
                       }

     

       52
       +
                       match parse_value(line) {

     

       53
       +
                           Ok(value) => {

     

       54
       +
                               if first_scan {

     

       55
       +
                                   match scanner.scan_for_value(value) {

     

       56
       +
                                       Ok(_) => first_scan = false,

     

       57
       +
                                       Err(e) => println!("Error scanning: {}", e),

     

       58
       +
                                   }

     

       59
       +
                               } else {

     

       60
       +
                                   match scanner.filter_matches(value) {

     

       61
       +
                                       Ok(_) => {}

     

       62
       +
                                       Err(e) => println!("Error filtering: {}", e),

     

       63
       +
                                   }

     

       64
       +
                               }

     

       65
       +
                           }

     

       66
       +
                           Err(e) => println!("Invalid value: {}", e),

     

       67
       +
                       }

     

       68
       +
                   }

     

       69
       +
                   Err(ReadlineError::Interrupted) | Err(ReadlineError::Eof) => {

     

       70
       +
                       println!("Exiting...");

     

       71
       +
                       break;

     

       72
       +
                   }

     

       73
       +
                   Err(err) => {

     

       74
       +
                       println!("Error: {}", err);

     

       75
       +
                       break;

     

       76
       +
                   }

     

       77
       +
               }

     

       78
       +
           }

     

       79
       +
       

     

       80
       +
           Ok(())

     

       81
       +
       }

     

       82
       +
       

     

       83
       +
       fn print_help() {

     

       84
       +
           println!("Available commands:");

     

       85
       +
           println!("  <value>      - Search for value or narrow down existing results");

     

       86
       +
           println!("  set <idx> <value> - Set value at the memory address at index <idx>");

     

       87
       +
           println!("  help         - Show this help message");

     

       88
       +
           println!("  exit/quit    - Exit the program");

     

       89
       +
       }

     

       90
       +
       

     

       91
       +
       fn handle_set_command(scanner: &mut MemoryScanner, command: &str) -> Result<()> {

     

       92
       +
           let parts: Vec<&str> = command.split_whitespace().collect();

     

       93
       +
           if parts.len() != 3 {

     

       94
       +
               anyhow::bail!("Invalid set command format. Use: set <idx> <value>");

     

       95
       +
           }

     

       96
       +
       

     

       97
       +
           let idx = match parts[1].parse::<usize>() {

     

       98
       +
               Ok(idx) => idx,

     

       99
       +
               Err(_) => anyhow::bail!("Invalid index: {}", parts[1]),

     

       100
       +
           };

     

       101
       +
       

     

       102
       +
           let value = match parse_value(parts[2])? {

     

       103
       +
               ScanValueType::I32(val) => val,

     

       104
       +
               _ => anyhow::bail!("Only i32 values are currently supported for setting"),

     

       105
       +
           };

     

       106
       +
       

     

       107
       +
           scanner.set_value(idx, value)

     

       108
       +
       }

     

       109
       +
       

     

       110
       +
       fn parse_value(value_str: &str) -> Result<ScanValueType> {

     

       111
       +
           if let Ok(val) = value_str.parse::<i32>() {

     

       112
       +
               return Ok(ScanValueType::I32(val));

     

       113
       +
           }

     

       114
       +
       

     

       115
       +
           // TODO missing implementation for all the other types

     

       116
       +
       

     

       117
       +
           anyhow::bail!("Could not parse '{}' as a valid number", value_str)

     

       118
       +
       }

+28

src/main.rs

···

       1
       +
       mod cli;

     

       2
       +
       mod memory;

     

       3
       +
       mod process;

     

       4
       +
       mod scanner;

     

       5
       +
       

     

       6
       +
       use anyhow::Result;

     

       7
       +
       use clap::Parser;

     

       8
       +
       use log::error;

     

       9
       +
       

     

       10
       +
       #[derive(Parser)]

     

       11
       +
       #[command(author, version, about, long_about = None)]

     

       12
       +
       struct Args {

     

       13
       +
           /// Process name to attach to

     

       14
       +
           process_name: String,

     

       15
       +
       }

     

       16
       +
       

     

       17
       +
       fn main() -> Result<()> {

     

       18
       +
           env_logger::init();

     

       19
       +
           let args = Args::parse();

     

       20
       +
       

     

       21
       +
           match cli::run_interactive_mode(&args.process_name) {

     

       22
       +
               Ok(_) => Ok(()),

     

       23
       +
               Err(e) => {

     

       24
       +
                   error!("Error: {}", e);

     

       25
       +
                   Err(e)

     

       26
       +
               }

     

       27
       +
           }

     

       28
       +
       }

+83

src/memory.rs

···

       1
       +
       use anyhow::Result;

     

       2
       +
       use libc::{c_void, iovec, process_vm_readv, process_vm_writev};

     

       3
       +
       use log::info;

     

       4
       +
       

     

       5
       +
       use crate::process::{MemoryRegion, Process};

     

       6
       +
       

     

       7
       +
       pub struct MemoryReader {

     

       8
       +
           process: Process,

     

       9
       +
       }

     

       10
       +
       

     

       11
       +
       impl MemoryReader {

     

       12
       +
           pub fn new(process: Process) -> Self {

     

       13
       +
               Self { process }

     

       14
       +
           }

     

       15
       +
       

     

       16
       +
           pub fn read_memory(&self, address: usize, size: usize) -> Result<Vec<u8>> {

     

       17
       +
               let mut buffer = vec![0u8; size];

     

       18
       +
       

     

       19
       +
               let local_iov = iovec {

     

       20
       +
                   iov_base: buffer.as_mut_ptr() as *mut c_void,

     

       21
       +
                   iov_len: size,

     

       22
       +
               };

     

       23
       +
       

     

       24
       +
               let remote_iov = iovec {

     

       25
       +
                   iov_base: address as *mut c_void,

     

       26
       +
                   iov_len: size,

     

       27
       +
               };

     

       28
       +
       

     

       29
       +
               let result = unsafe {

     

       30
       +
                   process_vm_readv(

     

       31
       +
                       self.process.pid as libc::pid_t,

     

       32
       +
                       &local_iov,

     

       33
       +
                       1,

     

       34
       +
                       &remote_iov,

     

       35
       +
                       1,

     

       36
       +
                       0,

     

       37
       +
                   )

     

       38
       +
               };

     

       39
       +
       

     

       40
       +
               if result == -1 {

     

       41
       +
                   let err = std::io::Error::last_os_error();

     

       42
       +
                   anyhow::bail!("Failed to read memory at 0x{:x}: {}", address, err);

     

       43
       +
               }

     

       44
       +
       

     

       45
       +
               Ok(buffer)

     

       46
       +
           }

     

       47
       +
       

     

       48
       +
           pub fn write_memory(&self, address: usize, data: &[u8]) -> Result<()> {

     

       49
       +
               let local_iov = iovec {

     

       50
       +
                   iov_base: data.as_ptr() as *mut c_void,

     

       51
       +
                   iov_len: data.len(),

     

       52
       +
               };

     

       53
       +
       

     

       54
       +
               let remote_iov = iovec {

     

       55
       +
                   iov_base: address as *mut c_void,

     

       56
       +
                   iov_len: data.len(),

     

       57
       +
               };

     

       58
       +
       

     

       59
       +
               let result = unsafe {

     

       60
       +
                   process_vm_writev(

     

       61
       +
                       self.process.pid as libc::pid_t,

     

       62
       +
                       &local_iov,

     

       63
       +
                       1,

     

       64
       +
                       &remote_iov,

     

       65
       +
                       1,

     

       66
       +
                       0,

     

       67
       +
                   )

     

       68
       +
               };

     

       69
       +
       

     

       70
       +
               if result == -1 {

     

       71
       +
                   let err = std::io::Error::last_os_error();

     

       72
       +
                   anyhow::bail!("Failed to write memory at 0x{:x}: {}", address, err);

     

       73
       +
               }

     

       74
       +
       

     

       75
       +
               info!("setting *0x{:x} to {:?}...", address, data);

     

       76
       +
               Ok(())

     

       77
       +
           }

     

       78
       +
       

     

       79
       +
           pub fn read_region(&self, region: &MemoryRegion) -> Result<Vec<u8>> {

     

       80
       +
               let size = region.end_addr - region.start_addr;

     

       81
       +
               self.read_memory(region.start_addr, size)

     

       82
       +
           }

     

       83
       +
       }

+109

src/process.rs

···

       1
       +
       use anyhow::Result;

     

       2
       +
       use log::info;

     

       3
       +
       use std::fs;

     

       4
       +
       use std::path::Path;

     

       5
       +
       use std::str::FromStr;

     

       6
       +
       

     

       7
       +
       pub struct Process {

     

       8
       +
           pub pid: i32,

     

       9
       +
           #[allow(dead_code)]

     

       10
       +
           pub name: String,

     

       11
       +
       }

     

       12
       +
       

     

       13
       +
       #[derive(Debug, Clone)]

     

       14
       +
       pub struct MemoryRegion {

     

       15
       +
           pub start_addr: usize,

     

       16
       +
           pub end_addr: usize,

     

       17
       +
           #[allow(dead_code)]

     

       18
       +
           pub permissions: String,

     

       19
       +
           #[allow(dead_code)]

     

       20
       +
           pub offset: usize,

     

       21
       +
           #[allow(dead_code)]

     

       22
       +
           pub pathname: String,

     

       23
       +
       }

     

       24
       +
       

     

       25
       +
       impl Process {

     

       26
       +
           pub fn find_by_name(name: &str) -> Result<Self> {

     

       27
       +
               // Search for process using pgrep-like functionality

     

       28
       +
               let proc_dir = Path::new("/proc");

     

       29
       +
               let mut found_pid = None;

     

       30
       +
       

     

       31
       +
               for entry in fs::read_dir(proc_dir)? {

     

       32
       +
                   let entry = entry?;

     

       33
       +
                   let path = entry.path();

     

       34
       +
       

     

       35
       +
                   if !path.is_dir() {

     

       36
       +
                       continue;

     

       37
       +
                   }

     

       38
       +
       

     

       39
       +
                   let file_name = path.file_name().unwrap().to_string_lossy();

     

       40
       +
                   if !file_name.chars().all(|c| c.is_digit(10)) {

     

       41
       +
                       continue;

     

       42
       +
                   }

     

       43
       +
       

     

       44
       +
                   let pid = i32::from_str(&file_name)?;

     

       45
       +
                   let cmdline_path = path.join("cmdline");

     

       46
       +
       

     

       47
       +
                   if !cmdline_path.exists() {

     

       48
       +
                       continue;

     

       49
       +
                   }

     

       50
       +
       

     

       51
       +
                   let cmdline = fs::read_to_string(cmdline_path)?;

     

       52
       +
                   if cmdline.contains(name) {

     

       53
       +
                       println!("Process found with PID: {}", pid);

     

       54
       +
                       found_pid = Some(pid);

     

       55
       +
                       break;

     

       56
       +
                   }

     

       57
       +
               }

     

       58
       +
       

     

       59
       +
               match found_pid {

     

       60
       +
                   Some(pid) => Ok(Process {

     

       61
       +
                       pid,

     

       62
       +
                       name: name.to_string(),

     

       63
       +
                   }),

     

       64
       +
                   None => anyhow::bail!("Process '{}' not found", name),

     

       65
       +
               }

     

       66
       +
           }

     

       67
       +
       

     

       68
       +
           pub fn get_memory_maps(&self) -> Result<Vec<MemoryRegion>> {

     

       69
       +
               let maps_path = format!("/proc/{}/maps", self.pid);

     

       70
       +
               info!("maps file located at {} opened.", maps_path);

     

       71
       +
       

     

       72
       +
               let maps_content = fs::read_to_string(&maps_path)?;

     

       73
       +
               let mut regions = Vec::new();

     

       74
       +
       

     

       75
       +
               for line in maps_content.lines() {

     

       76
       +
                   let parts: Vec<&str> = line.split_whitespace().collect();

     

       77
       +
                   if parts.len() < 5 {

     

       78
       +
                       continue;

     

       79
       +
                   }

     

       80
       +
       

     

       81
       +
                   let addr_range: Vec<&str> = parts[0].split('-').collect();

     

       82
       +
                   if addr_range.len() != 2 {

     

       83
       +
                       continue;

     

       84
       +
                   }

     

       85
       +
       

     

       86
       +
                   let start_addr = usize::from_str_radix(addr_range[0], 16)?;

     

       87
       +
                   let end_addr = usize::from_str_radix(addr_range[1], 16)?;

     

       88
       +
                   let permissions = parts[1].to_string();

     

       89
       +
       

     

       90
       +
                   // Only add regions with read permission

     

       91
       +
                   if permissions.contains('r') {

     

       92
       +
                       regions.push(MemoryRegion {

     

       93
       +
                           start_addr,

     

       94
       +
                           end_addr,

     

       95
       +
                           permissions,

     

       96
       +
                           offset: usize::from_str_radix(parts[2], 16)?,

     

       97
       +
                           pathname: if parts.len() > 5 {

     

       98
       +
                               parts[5..].join(" ")

     

       99
       +
                           } else {

     

       100
       +
                               String::new()

     

       101
       +
                           },

     

       102
       +
                       });

     

       103
       +
                   }

     

       104
       +
               }

     

       105
       +
       

     

       106
       +
               info!("{} suitable regions found.", regions.len());

     

       107
       +
               Ok(regions)

     

       108
       +
           }

     

       109
       +
       }

+207

src/scanner.rs

···

       1
       +
       use anyhow::Result;

     

       2
       +
       use log::{debug, info};

     

       3
       +
       use rayon::prelude::*;

     

       4
       +
       use std::sync::{Arc, Mutex};

     

       5
       +
       

     

       6
       +
       use crate::memory::MemoryReader;

     

       7
       +
       use crate::process::{MemoryRegion, Process};

     

       8
       +
       

     

       9
       +
       #[derive(Clone, Debug)]

     

       10
       +
       pub enum ScanValueType {

     

       11
       +
           #[allow(dead_code)]

     

       12
       +
           U8(u8),

     

       13
       +
           #[allow(dead_code)]

     

       14
       +
           U16(u16),

     

       15
       +
           #[allow(dead_code)]

     

       16
       +
           U32(u32),

     

       17
       +
           #[allow(dead_code)]

     

       18
       +
           U64(u64),

     

       19
       +
           #[allow(dead_code)]

     

       20
       +
           I8(i8),

     

       21
       +
           #[allow(dead_code)]

     

       22
       +
           I16(i16),

     

       23
       +
           I32(i32),

     

       24
       +
           #[allow(dead_code)]

     

       25
       +
           I64(i64),

     

       26
       +
           #[allow(dead_code)]

     

       27
       +
           F32(f32),

     

       28
       +
           #[allow(dead_code)]

     

       29
       +
           F64(f64),

     

       30
       +
       }

     

       31
       +
       

     

       32
       +
       #[derive(Clone, Debug)]

     

       33
       +
       pub struct MemoryMatch {

     

       34
       +
           pub address: usize,

     

       35
       +
           #[allow(dead_code)]

     

       36
       +
           pub value_type: ScanValueType,

     

       37
       +
       }

     

       38
       +
       

     

       39
       +
       pub struct MemoryScanner {

     

       40
       +
           reader: MemoryReader,

     

       41
       +
           regions: Vec<MemoryRegion>,

     

       42
       +
           matches: Vec<MemoryMatch>,

     

       43
       +
       }

     

       44
       +
       

     

       45
       +
       impl MemoryScanner {

     

       46
       +
           pub fn new(process: Process) -> Result<Self> {

     

       47
       +
               let regions = process.get_memory_maps()?;

     

       48
       +
               let reader = MemoryReader::new(process);

     

       49
       +
       

     

       50
       +
               println!(

     

       51
       +
                   "Successfully attached to process. Found {} readable memory regions.",

     

       52
       +
                   regions.len()

     

       53
       +
               );

     

       54
       +
       

     

       55
       +
               Ok(Self {

     

       56
       +
                   reader,

     

       57
       +
                   regions,

     

       58
       +
                   matches: Vec::new(),

     

       59
       +
               })

     

       60
       +
           }

     

       61
       +
       

     

       62
       +
           pub fn scan_for_value(&mut self, value: ScanValueType) -> Result<()> {

     

       63
       +
               let matches = Arc::new(Mutex::new(Vec::new()));

     

       64
       +
       

     

       65
       +
               self.regions

     

       66
       +
                   .par_iter()

     

       67
       +
                   .enumerate()

     

       68
       +
                   .for_each(|(idx, region)| {

     

       69
       +
                       println!(

     

       70
       +
                           "{:02}/{:03} searching {:x} - {:x}...",

     

       71
       +
                           idx + 1,

     

       72
       +
                           self.regions.len(),

     

       73
       +
                           region.start_addr,

     

       74
       +
                           region.end_addr

     

       75
       +
                       );

     

       76
       +
       

     

       77
       +
                       match self.scan_region(region, &value) {

     

       78
       +
                           Ok(region_matches) => {

     

       79
       +
                               let mut matches_guard = matches.lock().unwrap();

     

       80
       +
                               matches_guard.extend(region_matches);

     

       81
       +
                           }

     

       82
       +
                           Err(e) => {

     

       83
       +
                               debug!(

     

       84
       +
                                   "Error scanning region {:x}-{:x}: {}",

     

       85
       +
                                   region.start_addr, region.end_addr, e

     

       86
       +
                               );

     

       87
       +
                           }

     

       88
       +
                       }

     

       89
       +
       

     

       90
       +
                       print!("........ok\n");

     

       91
       +
                   });

     

       92
       +
       

     

       93
       +
               self.matches = Arc::try_unwrap(matches)

     

       94
       +
                   .expect("Failed to unwrap Arc")

     

       95
       +
                   .into_inner()

     

       96
       +
                   .expect("Failed to unlock Mutex");

     

       97
       +
       

     

       98
       +
               info!("we currently have {} matches.", self.matches.len());

     

       99
       +
               Ok(())

     

       100
       +
           }

     

       101
       +
       

     

       102
       +
           pub fn get_matches_count(&self) -> usize {

     

       103
       +
               self.matches.len()

     

       104
       +
           }

     

       105
       +
       

     

       106
       +
           fn scan_region(

     

       107
       +
               &self,

     

       108
       +
               region: &MemoryRegion,

     

       109
       +
               value: &ScanValueType,

     

       110
       +
           ) -> Result<Vec<MemoryMatch>> {

     

       111
       +
               // Basic implementation that scans a single region for matches

     

       112
       +
               let mut region_matches = Vec::new();

     

       113
       +
       

     

       114
       +
               match self.reader.read_region(region) {

     

       115
       +
                   Ok(memory) => {

     

       116
       +
                       // Simple implementation searching for i32 values

     

       117
       +
                       if let ScanValueType::I32(target) = value {

     

       118
       +
                           let target_bytes = target.to_ne_bytes();

     

       119
       +
       

     

       120
       +
                           for i in (0..memory.len().saturating_sub(4)).step_by(4) {

     

       121
       +
                               let mut matches = true;

     

       122
       +
                               for j in 0..4 {

     

       123
       +
                                   if memory[i + j] != target_bytes[j] {

     

       124
       +
                                       matches = false;

     

       125
       +
                                       break;

     

       126
       +
                                   }

     

       127
       +
                               }

     

       128
       +
       

     

       129
       +
                               if matches {

     

       130
       +
                                   region_matches.push(MemoryMatch {

     

       131
       +
                                       address: region.start_addr + i,

     

       132
       +
                                       value_type: value.clone(),

     

       133
       +
                                   });

     

       134
       +
                               }

     

       135
       +
                           }

     

       136
       +
                       }

     

       137
       +
                       // TODO missing handlers for all other types

     

       138
       +
                   }

     

       139
       +
                   Err(e) => {

     

       140
       +
                       println!(

     

       141
       +
                           "Error reading region {:x}-{:x}: {}",

     

       142
       +
                           region.start_addr, region.end_addr, e

     

       143
       +
                       );

     

       144
       +
                   }

     

       145
       +
               }

     

       146
       +
       

     

       147
       +
               Ok(region_matches)

     

       148
       +
           }

     

       149
       +
           pub fn filter_matches(&mut self, value: ScanValueType) -> Result<()> {

     

       150
       +
               let old_matches = std::mem::take(&mut self.matches);

     

       151
       +
       

     

       152
       +
               for m in old_matches {

     

       153
       +
                   let addr = m.address;

     

       154
       +
       

     

       155
       +
                   let data = match &value {

     

       156
       +
                       ScanValueType::I32(_) => {

     

       157
       +
                           match self.reader.read_memory(addr, 4) {

     

       158
       +
                               Ok(data) => data,

     

       159
       +
                               Err(_) => continue, // Skip if we can't read

     

       160
       +
                           }

     

       161
       +
                       }

     

       162
       +
                       _ => continue,

     

       163
       +
                   };

     

       164
       +
       

     

       165
       +
                   let matched = match &value {

     

       166
       +
                       ScanValueType::I32(target) => {

     

       167
       +
                           if data.len() >= 4 {

     

       168
       +
                               let value_bytes = target.to_ne_bytes();

     

       169
       +
                               data[0] == value_bytes[0]

     

       170
       +
                                   && data[1] == value_bytes[1]

     

       171
       +
                                   && data[2] == value_bytes[2]

     

       172
       +
                                   && data[3] == value_bytes[3]

     

       173
       +
                           } else {

     

       174
       +
                               false

     

       175
       +
                           }

     

       176
       +
                       }

     

       177
       +
                       _ => false,

     

       178
       +
                   };

     

       179
       +
       

     

       180
       +
                   if matched {

     

       181
       +
                       self.matches.push(MemoryMatch {

     

       182
       +
                           address: addr,

     

       183
       +
                           value_type: value.clone(),

     

       184
       +
                       });

     

       185
       +
                   }

     

       186
       +
               }

     

       187
       +
       

     

       188
       +
               println!("..........ok");

     

       189
       +
               info!("we currently have {} matches.", self.matches.len());

     

       190
       +
               Ok(())

     

       191
       +
           }

     

       192
       +
       

     

       193
       +
           pub fn set_value(&self, index: usize, value: i32) -> Result<()> {

     

       194
       +
               if index >= self.matches.len() {

     

       195
       +
                   anyhow::bail!(

     

       196
       +
                       "Index {} out of range (have {} matches)",

     

       197
       +
                       index,

     

       198
       +
                       self.matches.len()

     

       199
       +
                   );

     

       200
       +
               }

     

       201
       +
       

     

       202
       +
               let address = self.matches[index].address;

     

       203
       +
               let data = value.to_ne_bytes();

     

       204
       +
       

     

       205
       +
               self.reader.write_memory(address, &data)

     

       206
       +
           }

     

       207
       +
       }