pf_dump/
pf_dump.rs

1//! Emit, as JSON, prefetch-core's decompressed-payload and parsed
2//! [`PrefetchInfo`] fields for each fixture — consumed by the external-oracle
3//! validation harness (`docs/validation.md`). One JSON object per line; also
4//! writes each decompressed payload to `<out_dir>/<name>.scca` for a
5//! byte-for-byte diff against an independent decompressor.
6#![allow(clippy::unwrap_used, clippy::expect_used)]
7use std::path::PathBuf;
8
9/// Minimal FNV-free SHA-256 via the `sha2`-free route is overkill here; instead
10/// emit a hex of the payload length + a simple checksum the harness can match.
11/// We print the raw length and a hex digest computed by the harness side, so
12/// here we only need the length and the parsed fields; for the byte-identity
13/// check we also dump the full decompressed bytes to a sibling .scca file.
14fn main() {
15    let mut root = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
16    root.pop();
17    let out_dir = std::env::args()
18        .nth(1)
19        .unwrap_or_else(|| "/tmp/pf_scca".to_string());
20    std::fs::create_dir_all(&out_dir).expect("mkdir out_dir");
21
22    for name in [
23        "COREUPDATER.EXE-157C54BB.pf",
24        "AUDIODG.EXE-AB22E9A6.pf",
25        "AM_DELTA.EXE-78CA83B0.pf",
26    ] {
27        let p = root.join("tests/data").join(name);
28        let raw = std::fs::read(&p).expect("read fixture");
29        let scca = prefetch_core::decompress(&raw).expect("decompress");
30        // Write the decompressed payload so the harness can diff it against its
31        // own (dissect.util) decompression byte-for-byte.
32        std::fs::write(PathBuf::from(&out_dir).join(format!("{name}.scca")), &scca)
33            .expect("write scca");
34
35        let info = prefetch_core::parse(&raw).expect("parse");
36        let files: Vec<String> = info.filenames.iter().map(|f| escape(f)).collect();
37        let vols: Vec<String> = info
38            .volumes
39            .iter()
40            .map(|v| {
41                format!(
42                    "{{\"serial\":{},\"device_path\":\"{}\",\"creation_time\":{}}}",
43                    v.serial,
44                    escape(&v.device_path),
45                    v.creation_time
46                )
47            })
48            .collect();
49        println!(
50            "{{\"file\":\"{}\",\"scca_len\":{},\"version\":{},\"executable\":\"{}\",\"run_count\":{},\"last_run_times\":{:?},\"filenames_count\":{},\"filenames\":[{}],\"volumes\":[{}]}}",
51            name,
52            scca.len(),
53            info.version,
54            escape(&info.executable),
55            info.run_count,
56            info.last_run_times,
57            info.filenames.len(),
58            files.iter().map(|f| format!("\"{f}\"")).collect::<Vec<_>>().join(","),
59            vols.join(",")
60        );
61    }
62}
63
64fn escape(s: &str) -> String {
65    s.replace('\\', "\\\\")
66}
pf_dump/pf_dump.rs

pf_dump/
pf_dump.rs
