clrmeta

ECMA-335 CLI/.NET metadata parsing library for Rust.

Installation

Add to your Cargo.toml:

[dependencies]
clrmeta = "0.1"

Features

• Parse BSJB metadata root and stream headers
• Access heaps: #Strings, #US, #GUID, #Blob
• Parse metadata tables: Module, TypeDef, TypeRef, MethodDef, Assembly, AssemblyRef, etc.
• High-level API for common queries (assembly info, types, methods)
• No PE dependency - works with raw metadata bytes

Usage

use clrmeta::Metadata;

// Parse metadata from raw bytes (e.g., from PE's CLR data directory)
let metadata = Metadata::parse(&metadata_bytes)?;

println!("Runtime version: {}", metadata.version());

if let Some(assembly) = metadata.assembly() {
    println!("Assembly: {} v{}.{}.{}.{}",
        assembly.name,
        assembly.version.0, assembly.version.1,
        assembly.version.2, assembly.version.3);
}

for type_def in metadata.types() {
    println!("Type: {}", type_def.full_name());
}

Integration with portex

This crate is designed to work with portex for parsing .NET assemblies from PE files:

use portex::PE;
use clrmeta::Metadata;

let pe = PE::from_file("example.exe")?;

if let Some(cli_header) = pe.cli_header()? {
    let metadata_bytes = pe.read_at_rva(
        cli_header.metadata_rva,
        cli_header.metadata_size as usize
    ).unwrap();
    
    let metadata = Metadata::parse(metadata_bytes)?;
    // ...
}

References

• ECMA-335 CLI Specification

License

MIT