Initial commit

This commit is contained in:
Oystein Kristoffer Tveit 2024-12-12 21:58:58 +01:00
commit f266f31065
Signed by: oysteikt
GPG Key ID: 9F2F7D8250F35146
6 changed files with 521 additions and 0 deletions

1
.gitignore vendored Normal file

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/target

289
Cargo.lock generated Normal file

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9
Cargo.toml Normal file

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48
flake.lock generated Normal file

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{
"nodes": {
"nixpkgs": {
"locked": {
"lastModified": 1730785428,
"narHash": "sha256-Zwl8YgTVJTEum+L+0zVAWvXAGbWAuXHax3KzuejaDyo=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "4aa36568d413aca0ea84a1684d2d46f55dbabad7",
"type": "github"
},
"original": {
"owner": "NixOS",
"ref": "nixos-unstable",
"repo": "nixpkgs",
"type": "github"
}
},
"root": {
"inputs": {
"nixpkgs": "nixpkgs",
"rust-overlay": "rust-overlay"
}
},
"rust-overlay": {
"inputs": {
"nixpkgs": [
"nixpkgs"
]
},
"locked": {
"lastModified": 1731032894,
"narHash": "sha256-dQSyYPmrQiPr+PGEd+K8038rubFGz7G/dNXVeaGWE0w=",
"owner": "oxalica",
"repo": "rust-overlay",
"rev": "d52f2a4c103a0acf09ded857b9e2519ae2360e59",
"type": "github"
},
"original": {
"owner": "oxalica",
"repo": "rust-overlay",
"type": "github"
}
}
},
"root": "root",
"version": 7
}

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flake.nix Normal file

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{
inputs = {
nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
rust-overlay.url = "github:oxalica/rust-overlay";
rust-overlay.inputs.nixpkgs.follows = "nixpkgs";
};
outputs = { self, nixpkgs, rust-overlay }:
let
inherit (nixpkgs) lib;
systems = [
"x86_64-linux"
"aarch64-linux"
"x86_64-darwin"
"aarch64-darwin"
"armv7l-linux"
];
forAllSystems = f: lib.genAttrs systems (system: let
pkgs = import nixpkgs {
inherit system;
overlays = [
(import rust-overlay)
];
};
rust-bin = rust-overlay.lib.mkRustBin { } pkgs.buildPackages;
toolchain = rust-bin.stable.latest.default.override {
extensions = [ "rust-src" "rust-analyzer" "rust-std" ];
};
in f system pkgs toolchain);
in {
devShells = forAllSystems (system: pkgs: toolchain: {
default = pkgs.mkShell {
nativeBuildInputs = [
toolchain
];
RUST_SRC_PATH = "${toolchain}/lib/rustlib/src/rust/library";
};
});
};
}

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src/main.rs Normal file

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use anyhow::Result;
use core::str;
use std::path::PathBuf;
use clap::Parser;
#[derive(Parser, Debug)]
struct Args {
#[command(subcommand)]
command: Command,
}
#[derive(Parser, Debug, Clone)]
enum Command {
#[command()]
DiscoverLibs(DiscoverLibsArgs),
#[command()]
DetermineRustVersion(DetermineRustVersionArgs),
}
#[derive(Parser, Debug, Clone)]
#[command()]
struct DiscoverLibsArgs {
#[arg()]
file: PathBuf,
}
#[derive(Parser, Debug, Clone)]
struct DetermineRustVersionArgs {
#[arg()]
file: PathBuf,
}
fn main() -> Result<()> {
let args = Args::parse();
match args.command {
Command::DiscoverLibs(args) => {
let binary = std::fs::read(&args.file)?;
let strings = strings(&binary, 4);
let libs = discover_libraries(strings);
for lib in libs {
println!("{:?}", lib);
}
Ok(())
}
Command::DetermineRustVersion(args) => {
let binary = std::fs::read(&args.file)?;
let strings = strings(&binary, 4);
let version = determine_rust_version(strings);
println!("{:?}", version);
Ok(())
}
}
}
/// Scan through binary content and return a list of strings.
/// The threshold parameter is used to determine the minimum
/// amount of consecutive printable ascii characters that
/// should be considered a string.
fn strings<'a>(binary: &'a [u8], threshold: u32) -> Vec<&'a str> {
let mut strings = Vec::new();
let mut start_index: Option<usize> = None;
for (i, byte) in binary.iter().enumerate() {
if *byte >= 32 && *byte <= 126 {
if start_index.is_none() {
start_index = Some(i);
}
} else {
if let Some(start) = start_index {
if (i - start) as u32 >= threshold {
let string = std::str::from_utf8(&binary[start..i]).unwrap();
strings.push(string);
}
start_index = None;
}
}
}
strings
}
#[derive(Debug, Clone)]
struct Library<'a> {
name: &'a str,
version: &'a str,
hash: &'a str,
}
/// Scan through a compiled rust binary and return a list of
/// libraries that the binary assumingly depends on.
fn discover_libraries(strings: Vec<&str>) -> Vec<Library> {
let mut matches: Vec<Library> = Vec::new();
for string in strings.iter().filter(|s| s.contains("index.crates.io")) {
// TODO: Should we add support for dependencies from other sources?
let rgx =
regex::Regex::new(r"index.crates.io-([a-f0-9]{16})/([a-zA-Z0-9_-]+)-(\d+\.\d+\.\d+)/")
.unwrap();
let captures = match rgx.captures(string) {
Some(captures) => captures,
None => continue,
};
let hash = captures.get(1).unwrap().as_str();
let crate_name = captures.get(2).unwrap().as_str();
let crate_version = captures.get(3).unwrap().as_str();
matches.push(Library {
name: crate_name,
version: crate_version,
hash: hash,
});
}
return matches;
}
/// Scan through a compiled rust binary and return the version
/// of the rust compiler/stdlib that was used to compile the binary.
fn determine_rust_version(strings: Vec<&str>) -> Option<String> {
let mut matches: Vec<&str> = Vec::new();
for string in strings.iter().filter(|s| s.contains("/rustc/")) {
let rgx = regex::Regex::new(r"/rustc/([a-f0-9]{40})").unwrap();
let captures = match rgx.captures(string) {
Some(captures) => captures,
None => continue,
};
let rustc_version = captures.get(1).unwrap().as_str();
matches.push(rustc_version);
}
return matches.first().map(|s| s.to_string());
}