/
cpython.rs
227 lines (209 loc) · 7.04 KB
/
cpython.rs
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use anyhow::{anyhow, Result};
use log::*;
use std::fs::{self, File};
use std::path::PathBuf;
use std::process::Command;
use goblin::elf::Elf;
use memmap::MmapOptions;
use regex::Regex;
use crate::async_command::run_async_process;
use crate::runtime::{ProbeCopy, ProbeState, ProbeStateInspect};
use crate::{process::ProcessInfo, settings};
pub struct CPythonProbeState {}
impl ProbeStateInspect for CPythonProbeState {
fn inspect_process(process_info: &ProcessInfo) -> Result<ProbeState> {
search_proc_map(process_info)
}
}
fn search_proc_map(process_info: &ProcessInfo) -> Result<ProbeState> {
let maps = procfs::process::Process::new(process_info.pid)?.maps()?;
for map in maps.iter() {
if let procfs::process::MMapPath::Path(p) = map.pathname.clone() {
let s = match p.into_os_string().into_string() {
Ok(s) => s,
Err(os) => {
warn!("convert osstr to string failed: {:?}", os);
continue;
}
};
if s.contains("python_loader") {
return Ok(ProbeState::Attached);
}
}
}
Ok(ProbeState::NotAttach)
}
pub struct CPythonProbe {}
impl ProbeCopy for CPythonProbe {
fn names() -> (Vec<String>, Vec<String>) {
(
[settings::RASP_PYTHON_LOADER()].to_vec(),
[settings::RASP_PYTHON_DIR()].to_vec(),
)
}
}
pub struct CPythonRuntime {}
impl CPythonRuntime {
pub fn python_inspect(process_info: &ProcessInfo) -> Option<String> {
match Self::libpython_inspect(process_info) {
Ok(s) => {
if s.is_some() {
return s;
}
}
Err(e) => {
warn!("inspect libpython failed: {}", e)
}
}
match Self::symbol_inspect(&process_info) {
Ok(s) => {
if s.is_some() {
return s;
}
}
Err(e) => {
warn!("inspect python symbol failed: {}", e)
}
}
None
}
pub fn libpython_inspect(process_info: &ProcessInfo) -> Result<Option<String>> {
let maps = procfs::process::Process::new(process_info.pid)?.maps()?;
let regex_str = r"libpython(\d\.\d+)\.so";
let regex = Regex::new(regex_str)?;
for map in maps.iter() {
if let procfs::process::MMapPath::Path(p) = map.pathname.clone() {
let s = match p.into_os_string().into_string() {
Ok(s) => s,
Err(os) => {
warn!("convert osstr to string failed: {:?}", os);
continue;
}
};
match regex.captures(&s) {
Some(c) => {
if let Some(version) = c.get(1) {
return Ok(Some(String::from(version.as_str())));
}
}
None => continue,
}
}
}
Ok(None)
}
pub fn symbol_inspect(process_info: &ProcessInfo) -> Result<Option<String>> {
let pid = process_info.pid.clone();
let exe_path = process_info.exe_path.clone().unwrap();
// /proc/<pid>/<exe_path> for process in container
let mut path = PathBuf::from(format!("/proc/{}/root/", pid));
let exe_path_buf = PathBuf::from(exe_path);
if !exe_path_buf.has_root() {
path.push(exe_path_buf);
} else {
for p in exe_path_buf.iter() {
if p == std::ffi::OsString::from("/") {
continue;
}
path.push(p);
}
}
let metadata = fs::metadata(path.clone())?;
let size = metadata.len();
if size >= (500 * 1024 * 1024) {
return Err(anyhow!("bin file oversize: {}", process_info.pid));
}
let file = File::open(path)?;
let bin = unsafe { MmapOptions::new().map(&file)? };
let elf = Elf::parse(&bin)?;
for dynsym in elf.dynsyms.iter() {
let name = elf.dynstrtab[dynsym.st_name].to_string();
if name == "PyRun_SimpleString" {
return Ok(Some("Unknow".to_string()));
}
}
for sym in elf.syms.iter() {
let name = elf.strtab[sym.st_name].to_string();
if name == "PyRun_SimpleString" {
return Ok(Some("Unknow".to_string()));
}
}
return Ok(None);
}
}
pub fn python_attach(pid: i32) -> Result<bool> {
debug!("python attach: {}", pid);
write_python_entry(pid)?;
let entry = settings::RASP_PYTHON_ENTRY();
// pangolin inject
pangolin_inject_file(pid, entry.as_str())
}
pub fn write_python_entry(pid: i32) -> Result<()> {
let content = format!(
r#"import os
import sys
name = 'rasp'
path = '{}/__init__.py'
if sys.version_info >= (3, 3):
from importlib.machinery import SourceFileLoader
SourceFileLoader(name, path).load_module()
elif sys.version_info >= (2, 7):
import imp
imp.load_module(name, None, os.path.dirname(path), ('', '', imp.PKG_DIRECTORY))
"#,
settings::RASP_PYTHON_DIR()
);
let path = settings::RASP_PYTHON_ENTRY();
let dest_dir = format!("/proc/{}/root{}", pid, path);
fs_extra::file::write_all(dest_dir, content.as_str())?;
Ok(())
}
pub fn pangolin_inject_file(pid: i32, file_path: &str) -> Result<bool> {
debug!("pangolin inject: {}", pid);
let python_loader = settings::RASP_PYTHON_LOADER();
let pangolin = settings::RASP_PANGOLIN();
let file = "--file";
let extra = "--";
let pid_string = pid.clone().to_string();
let args = &[
pid_string.as_str(),
extra,
python_loader.as_str(),
file,
file_path,
];
match run_async_process(Command::new(pangolin).args(args)) {
Ok((es, stdout, stderr)) => {
if stdout.len() != 0 {
info!("return code: {}\n{}", es.to_string(), &stdout);
}
if stderr.len() != 0 {
warn!("return code: {}\n{}", es.to_string(), &stderr);
}
let es_code = match es.code() {
Some(ec) => ec,
None => {
return Err(anyhow!("get status code failed: {}", pid));
}
};
if es_code == 0 {
Ok(true)
} else if es_code == 255 {
let msg = format!(
"python attach exit code 255: {} {} {} {}",
es_code, pid, &stdout, &stderr
);
error!("{}", msg);
Err(anyhow!("{}", msg))
} else {
let msg = format!(
"python attach exit code {} {} {} {}",
es_code, pid, &stdout, &stderr
);
error!("{}", msg);
Err(anyhow!("{}", msg))
}
}
Err(e) => Err(anyhow!(e.to_string())),
}
}