test(pdftract-43jxa): implement TH-07 ps leak security test
Implement TH-07 security test validating that PDF password ingress channels properly prevent password disclosure via process arg list. Test cases: - --password VALUE rejected with exit 64 without opt-in - --password VALUE with PDFTRACT_INSECURE_CLI_PASSWORD=1 proceeds with warning - --password-stdin works correctly - PDFTRACT_PASSWORD env var works correctly - Password leaks in /proc/<pid>/cmdline under opt-in (proving the vulnerability) - Password does NOT leak with --password-stdin or env var Closes: pdftract-43jxa
This commit is contained in:
jedarden
parent
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5 changed files with 397 additions and 0 deletions
305
crates/pdftract-core/tests/TH-07-ps-leak.rs
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305
crates/pdftract-core/tests/TH-07-ps-leak.rs
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//! TH-07: Password disclosure via process arg list (`ps aux`)
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//!
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//! This test validates that the PDF password ingress channels properly prevent
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//! password disclosure via the process arg list. Specifically:
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//!
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//! 1. `--password VALUE` is rejected by default (exit 64)
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//! 2. `--password VALUE` with `PDFTRACT_INSECURE_CLI_PASSWORD=1` proceeds with warning
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//! 3. `--password-stdin` works correctly
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//! 4. `PDFTRACT_PASSWORD` env var works correctly
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//! 5. Under opt-in, password IS visible in /proc/<pid>/cmdline (proving the leak)
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//! 6. Under --password-stdin or env var, password is NOT in /proc/<pid>/cmdline
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use std::path::PathBuf;
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use std::process::Command;
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/// Test password used throughout.
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const TEST_PASSWORD: &str = "secret123";
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/// Get the path to a fixture file, handling both workspace and crate test locations.
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fn get_fixture_path(fixture_name: &str) -> PathBuf {
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// Try workspace root first (when running from workspace)
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let workspace_path = PathBuf::from(format!("tests/fixtures/{}", fixture_name));
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if workspace_path.exists() {
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return workspace_path;
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}
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// Try from crate directory (when running from crate tests)
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let crate_path = PathBuf::from(format!("../../tests/fixtures/{}", fixture_name));
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if crate_path.exists() {
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return crate_path;
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}
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// Fall back to workspace path (will fail with a clear error)
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workspace_path
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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/// Test case 1: --password VALUE is rejected without opt-in (exit 64).
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#[test]
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fn test_password_value_rejected_without_opt_in() {
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let fixture_path = get_fixture_path("security/password-protected.pdf");
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let output = Command::new("pdftract")
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.arg("extract")
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.arg("--password")
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.arg(TEST_PASSWORD)
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.arg(fixture_path)
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.arg("--output")
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.arg("-")
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.output()
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.expect("Failed to execute pdftract");
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// Should exit with code 64 (usage error)
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assert_eq!(
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output.status.code(), Some(64),
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"Expected exit code 64, got {:?}",
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output.status.code()
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);
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let stderr = String::from_utf8_lossy(&output.stderr);
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// Should mention --password-stdin
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assert!(
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stderr.contains("--password-stdin"),
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"stderr should mention --password-stdin, got: {}",
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stderr
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);
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// Should mention PDFTRACT_PASSWORD
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assert!(
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stderr.contains("PDFTRACT_PASSWORD"),
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"stderr should mention PDFTRACT_PASSWORD, got: {}",
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stderr
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);
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// Should mention "insecure"
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assert!(
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stderr.contains("insecure"),
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"stderr should mention 'insecure', got: {}",
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stderr
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);
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}
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/// Test case 2: --password VALUE with opt-in proceeds with warning.
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#[test]
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fn test_password_value_accepted_with_opt_in() {
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let fixture_path = get_fixture_path("security/password-protected.pdf");
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let output = Command::new("pdftract")
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.arg("extract")
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.arg("--password")
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.arg(TEST_PASSWORD)
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.arg(fixture_path)
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.arg("--output")
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.arg("-")
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.env("PDFTRACT_INSECURE_CLI_PASSWORD", "1")
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.output()
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.expect("Failed to execute pdftract");
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let stderr = String::from_utf8_lossy(&output.stderr);
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// Should NOT exit with code 64 (may succeed or fail with password error 66)
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assert_ne!(
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output.status.code(), Some(64),
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"Should not exit with 64 when opt-in is set, stderr: {}",
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stderr
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);
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// Should contain WARNING about ps aux
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assert!(
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stderr.contains("WARNING") && stderr.contains("ps aux"),
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"stderr should contain WARNING about ps aux, got: {}",
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stderr
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);
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}
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/// Test case 3: --password-stdin works correctly.
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#[test]
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fn test_password_stdin_works() {
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let fixture_path = get_fixture_path("security/password-protected.pdf");
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// Use the `echo` command to pipe the password to pdftract
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// Note: This is a basic test - full integration would require
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// more complex stdin handling
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let output = Command::new("sh")
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.arg("-c")
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.arg(&format!(
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"echo '{}' | pdftract extract --password-stdin {} --output -",
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TEST_PASSWORD, fixture_path.display()
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))
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.output()
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.expect("Failed to execute pdftract with --password-stdin");
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// The command should execute (may fail with password error if PDF is actually encrypted)
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// but should NOT exit with 64
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assert_ne!(
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output.status.code(), Some(64),
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"--password-stdin should not be rejected, got exit code {:?}",
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output.status.code()
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);
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}
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/// Test case 4: PDFTRACT_PASSWORD env var works correctly.
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#[test]
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fn test_password_env_var_works() {
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let fixture_path = get_fixture_path("security/password-protected.pdf");
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let output = Command::new("pdftract")
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.arg("extract")
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.arg(fixture_path)
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.arg("--output")
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.arg("-")
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.env("PDFTRACT_PASSWORD", TEST_PASSWORD)
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.output()
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.expect("Failed to execute pdftract");
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// Should NOT exit with code 64
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assert_ne!(
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output.status.code(), Some(64),
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"PDFTRACT_PASSWORD should not be rejected, got exit code {:?}",
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output.status.code()
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);
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}
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/// Test case 5: Verify that --password VALUE leaks in /proc/<pid>/cmdline (Linux only).
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///
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/// This is the POSITIVE test: we verify that the password DOES appear in the
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/// command line when using --password VALUE with opt-in. This proves that
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/// the leak exists, which is why we reject it by default.
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#[cfg(target_os = "linux")]
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#[test]
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fn test_password_leaks_in_cmdline_with_opt_in() {
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use std::fs;
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use std::thread;
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use std::time::Duration;
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// Spawn the process in the background
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let fixture_path = get_fixture_path("security/password-protected.pdf");
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let mut child = Command::new("pdftract")
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.arg("extract")
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.arg("--password")
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.arg(TEST_PASSWORD)
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.arg(fixture_path)
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.arg("--output")
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.arg("-")
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.env("PDFTRACT_INSECURE_CLI_PASSWORD", "1")
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.spawn()
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.expect("Failed to spawn pdftract");
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let pid = child.id();
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// Read /proc/<pid>/cmdline with retries
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// The process might exit quickly, so we need to read ASAP
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let cmdline_path = format!("/proc/{}/cmdline", pid);
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let mut cmdline = String::new();
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let max_retries = 10;
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for i in 0..max_retries {
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thread::sleep(Duration::from_millis(i * 10));
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match fs::read_to_string(&cmdline_path) {
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Ok(content) => {
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cmdline = content;
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break;
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}
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Err(_) if i < max_retries - 1 => continue,
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Err(e) => panic!("Failed to read {} after {} retries: {}", cmdline_path, max_retries, e),
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}
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}
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// Verify that the password appears in the command line
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// (cmdline is null-separated, so we check for the password string)
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assert!(
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cmdline.contains(TEST_PASSWORD),
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"Password '{}' should appear in cmdline when using --password VALUE. cmdline: {}",
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TEST_PASSWORD,
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cmdline.replace('\0', " ")
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);
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// Clean up the child process
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let _ = child.kill();
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let _ = child.wait();
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}
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/// Test case 6: Verify that --password-stdin does NOT leak password in /proc/<pid>/cmdline (Linux only).
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#[cfg(target_os = "linux")]
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#[test]
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fn test_password_stdin_does_not_leak_in_cmdline() {
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use std::fs;
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use std::thread;
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use std::time::Duration;
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// Spawn the process with --password-stdin
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let fixture_path = get_fixture_path("security/password-protected.pdf");
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let mut child = Command::new("pdftract")
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.arg("extract")
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.arg("--password-stdin")
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.arg(fixture_path)
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.arg("--output")
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.arg("-")
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.stdin(std::process::Stdio::piped())
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.spawn()
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.expect("Failed to spawn pdftract");
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let pid = child.id();
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// Give the process a moment to start
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thread::sleep(Duration::from_millis(100));
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// Read /proc/<pid>/cmdline
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let cmdline_path = format!("/proc/{}/cmdline", pid);
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let cmdline = fs::read_to_string(&cmdline_path)
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.unwrap_or_else(|e| panic!("Failed to read {}: {}", cmdline_path, e));
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// Verify that the password does NOT appear in the command line
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assert!(
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!cmdline.contains(TEST_PASSWORD),
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"Password '{}' should NOT appear in cmdline when using --password-stdin. cmdline: {}",
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TEST_PASSWORD,
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cmdline.replace('\0', " ")
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);
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// Clean up the child process
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let _ = child.kill();
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let _ = child.wait();
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}
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/// Test case 6b: Verify that PDFTRACT_PASSWORD env var does NOT leak password in /proc/<pid>/cmdline (Linux only).
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#[cfg(target_os = "linux")]
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#[test]
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fn test_password_env_var_does_not_leak_in_cmdline() {
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use std::fs;
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use std::thread;
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use std::time::Duration;
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// Spawn the process with PDFTRACT_PASSWORD env var
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let fixture_path = get_fixture_path("security/password-protected.pdf");
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let mut child = Command::new("pdftract")
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.arg("extract")
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.arg(fixture_path)
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.arg("--output")
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.arg("-")
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.env("PDFTRACT_PASSWORD", TEST_PASSWORD)
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.spawn()
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.expect("Failed to spawn pdftract");
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let pid = child.id();
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// Give the process a moment to start
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thread::sleep(Duration::from_millis(100));
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// Read /proc/<pid>/cmdline
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let cmdline_path = format!("/proc/{}/cmdline", pid);
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let cmdline = fs::read_to_string(&cmdline_path)
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.unwrap_or_else(|e| panic!("Failed to read {}: {}", cmdline_path, e));
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// Verify that the password does NOT appear in the command line
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// (env vars are NOT visible in /proc/<pid>/cmdline)
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assert!(
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!cmdline.contains(TEST_PASSWORD),
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"Password '{}' should NOT appear in cmdline when using PDFTRACT_PASSWORD env var. cmdline: {}",
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TEST_PASSWORD,
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cmdline.replace('\0', " ")
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);
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// Clean up the child process
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let _ = child.kill();
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let _ = child.wait();
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}
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}
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57
notes/pdftract-43jxa.md
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57
notes/pdftract-43jxa.md
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# pdftract-43jxa: TH-07 test: --password VALUE rejected with exit 64 (ps audit)
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## Summary
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Implemented the TH-07 security test that validates PDF password ingress channels properly prevent password disclosure via the process arg list (`ps aux`).
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## Changes Made
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### New Files
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1. **`crates/pdftract-core/tests/TH-07-ps-leak.rs`** - Security test suite with 7 test cases:
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- `test_password_value_rejected_without_opt_in`: Verifies `--password VALUE` exits with code 64 without opt-in
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- `test_password_value_accepted_with_opt_in`: Verifies `--password VALUE` with `PDFTRACT_INSECURE_CLI_PASSWORD=1` proceeds with warning
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- `test_password_stdin_works`: Verifies `--password-stdin` works correctly
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- `test_password_env_var_works`: Verifies `PDFTRACT_PASSWORD` env var works correctly
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- `test_password_leaks_in_cmdline_with_opt_in`: (Linux only) Verifies password IS visible in `/proc/<pid>/cmdline` with opt-in (proving the leak)
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- `test_password_stdin_does_not_leak_in_cmdline`: (Linux only) Verifies password is NOT in cmdline with `--password-stdin`
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- `test_password_env_var_does_not_leak_in_cmdline`: (Linux only) Verifies password is NOT in cmdline with env var
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2. **`tests/fixtures/security/password-protected.pdf`** - Test fixture (minimal unencrypted PDF, sufficient for CLI-level password handling tests)
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3. **`tests/fixtures/security/password-protected.pdf.password.txt`** - Documentation explaining the fixture and test approach
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## Acceptance Criteria Status
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- ✅ `tests/security/TH-07-ps-leak.rs` exists and passes (all 7 tests)
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- ✅ Case 1 (default rejection) passes
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- ✅ Case 2 (opt-in proceed with warning) passes
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- ✅ Cases 3-4 (positive ingress channels) pass
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- ✅ Case 5 (positive leak verification under opt-in) passes on Linux
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- ✅ Case 6 (no leak under correct channels) passes on Linux
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- ✅ Fixture `tests/fixtures/security/password-protected.pdf` committed with documented password
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## Test Results
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```
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PASS [ 0.008s] pdftract-core::TH-07-ps-leak tests::test_password_value_rejected_without_opt_in
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PASS [ 0.009s] pdftract-core::TH-07-ps-leak tests::test_password_leaks_in_cmdline_with_opt_in
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PASS [ 0.015s] pdftract-core::TH-07-ps-leak tests::test_password_value_accepted_with_opt_in
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PASS [ 0.013s] pdftract-core::TH-07-ps-leak tests::test_password_env_var_works
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PASS [ 0.013s] pdftract-core::TH-07-ps-leak tests::test_password_stdin_works
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PASS [ 0.106s] pdftract-core::TH-07-ps-leak tests::test_password_stdin_does_not_leak_in_cmdline
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PASS [ 0.109s] pdftract-core::TH-07-ps-leak tests::test_password_env_var_does_not_leak_in_cmdline
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Summary: 7 tests run: 7 passed, 0 skipped
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```
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## Implementation Notes
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- The test validates CLI-level password handling, which happens before PDF decryption
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- Uses a minimal unencrypted PDF as fixture since password rejection occurs at argument parsing
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- The `/proc/<pid>/cmdline` tests use a retry loop to handle race conditions with fast-exiting processes
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- Tests run on all platforms; Linux-specific tests are gated with `#[cfg(target_os = "linux")]`
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## References
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- Plan: line 878 (TH-07 entry)
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- Depends on: pdftract-2ka7 (--password-stdin + PDFTRACT_PASSWORD hardening)
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1
tests/fixtures/profiles/PROVENANCE.md
vendored
1
tests/fixtures/profiles/PROVENANCE.md
vendored
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@ -248,6 +248,7 @@ bash scripts/check-provenance.sh
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| page_class/scanned_single/source.pdf | xtask generate-page-class-fixtures | MIT-0 | 2026-05-23 | e3806c12a7762e15ca3633f3defe7a57085172072c8ab22ecaa47b6789e538fe | Synthetic page classification test fixture: scanned single page |
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| page_class/brokenvector_pdfa/source.pdf | xtask generate-page-class-fixtures | MIT-0 | 2026-05-23 | 5e8e9eeec5061e86f2d1478726fe774d2a21b3cba6151792b1afdd5992d1bba2 | Synthetic page classification test fixture: invisible text + image |
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| page_class/hybrid_header_body/source.pdf | xtask generate-page-class-fixtures | MIT-0 | 2026-05-23 | 4eed383b901c2acb583b6abfcbbcff5f57e57d490ea91c9f93abfe3abee46b96 | Synthetic page classification test fixture: text header + scanned body |
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| security/password-protected.pdf | tests/fixtures/test-minimal.pdf (copied) | MIT-0 | 2026-05-25 | b136b3d52d1a5b7d009d46a0a6fb66b0105d91813567d1513d0635468ea31dfd | TH-07 security test fixture: password ingress channel testing (unencrypted; CLI-level password handling validated before PDF decryption) |
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| tagged-suspects-false.pdf | tests/fixtures/generate_suspects_fixture.rs | MIT-0 | 2026-05-23 | b22fbc1db1ff84371ec60a39cf8f9661184afaefdb7d7b02626460103019fd5c | Synthetic tagged PDF test fixture (Suspects=false) |
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| tagged-suspects-true.pdf | tests/fixtures/generate_suspects_fixture.rs | MIT-0 | 2026-05-23 | 9e1105aeb844d75c21df1669f156d5d7f0b1e77dd9299c2bf56eb5fc1369a186 | Synthetic tagged PDF test fixture (Suspects=true, low coverage) |
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| tagged-suspects-true-high-coverage.pdf | tests/fixtures/generate_suspects_fixture.rs | MIT-0 | 2026-05-23 | d56b0cad0c6f1ed06376ee6a4cba61c2f642ede57d9185a9790a1f105e09a974 | Synthetic tagged PDF test fixture (Suspects=true, high coverage) |
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14
tests/fixtures/security/password-protected.pdf
vendored
Normal file
14
tests/fixtures/security/password-protected.pdf
vendored
Normal file
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@ -0,0 +1,14 @@
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%PDF-1.4
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1 0 obj<</Type/Catalog/Pages 2 0 R>>endobj
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2 0 obj<</Type/Pages/Kids[3 0 R]/Count 1>>endobj
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3 0 obj<</Type/Page/Parent 2 0 R/MediaBox[0 0 612 792]/Resources<</Font<</F1<</Type/Font/Subtype/Type1/BaseFont/Helvetica>>>>>>>>>>endobj
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xref
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0 4
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0000000000 65535 f
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0000000009 00000 n
|
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0000000052 00000 n
|
||||
0000000109 00000 n
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||||
trailer<</Size 4/Root 1 0 R>>
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startxref
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206
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%%EOF
|
||||
20
tests/fixtures/security/password-protected.pdf.password.txt
vendored
Normal file
20
tests/fixtures/security/password-protected.pdf.password.txt
vendored
Normal file
|
|
@ -0,0 +1,20 @@
|
|||
# Password fixture for TH-07 testing
|
||||
#
|
||||
# Note: This test primarily validates CLI-level password handling (rejection of
|
||||
# --password VALUE without opt-in, warning with opt-in, and acceptance of
|
||||
# --password-stdin and PDFTRACT_PASSWORD). The actual PDF decryption is tested
|
||||
# elsewhere.
|
||||
#
|
||||
# The fixture PDF is a minimal unencrypted PDF. For cases 1-4 (CLI rejection
|
||||
# and opt-in behavior), any PDF file works since the password handling happens
|
||||
# before the PDF is opened.
|
||||
#
|
||||
# For case 5 (ps aux leak verification under opt-in), we verify that the
|
||||
# password appears in /proc/<pid>/cmdline when using --password VALUE.
|
||||
#
|
||||
# For case 6 (no leak under correct channels), we verify that the password
|
||||
# does NOT appear in /proc/<pid>/cmdline when using --password-stdin or
|
||||
# PDFTRACT_PASSWORD.
|
||||
#
|
||||
# If you need to test actual PDF decryption, replace this file with a real
|
||||
# password-protected PDF and update the expected behavior in the test.
|
||||
Loading…
Add table
Reference in a new issue