a3d9ce19e6
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
57 lines
3.1 KiB
Markdown
57 lines
3.1 KiB
Markdown
# 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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