corim

Concise Reference Integrity Manifest (CoRIM) — Rust implementation of draft-ietf-rats-corim-10.

CBOR-native Rust types for the CoRIM / CoMID CDDL schema, a builder API, validation/appraisal logic, and signed CoRIM (COSE_Sign1) support for Remote Attestation (RATS) Endorsements and Reference Values.

Features

• Full CDDL coverage — corim-map, CoMID, CoTL, all 9 triple types, measurement-values-map with all fields
• Signed CoRIM (#6.18) — decode, validate, construct (attached + detached); no crypto dependency
• Zero-dependency CBOR — built-in encoder/decoder, deterministic per RFC 8949 §4.2.1
• no_std support — #![no_std] + alloc; std feature (default) adds SystemTime-based validation
• Builder API — ComidBuilder, CotlBuilder, CorimBuilder, SignedCorimBuilder. Opt-in environment catalog (declare_env / EnvRef / add_*_for) lets one EnvironmentMap be shared across triples without duplication, and strict_links adds a cross-triple env-anchoring lint.
• Validation & Appraisal — reference value matching (§9.3), conditional endorsement series (§9.3.4)
• Profile framework — Profile trait, ProfileRegistry, and a MatchContext for time-aware comparators let downstream crates plug in CoRIM profiles that define their own tags or measurement-values-map extras. The first-party Intel profile ships under the profile-intel feature flag.
• CoSWID — structured types per RFC 9393 with co-constraint validation
• Optional JSON — json feature gate for Value ↔ serde_json::Value conversion
• TCG / NVIDIA decode interop — accepts the legacy #6.500 / #6.502 outer wrappers, bare corim-map payloads, and TCG-style #6.506(map) CoMID nesting seen in real-world signed CoRIMs (notably NVIDIA NIC firmware). Decode-only; encoders always emit draft-10 wire format.

Quick start

use corim::builder::{ComidBuilder, CorimBuilder};
use corim::types::common::{TagIdChoice, MeasuredElement};
use corim::types::corim::CorimId;
use corim::types::environment::{ClassMap, EnvironmentMap};
use corim::types::measurement::{Digest, MeasurementMap, MeasurementValuesMap};
use corim::types::triples::ReferenceTriple;

let env = EnvironmentMap {
    class: Some(ClassMap {
        class_id: None,
        vendor: Some("ACME".into()),
        model: Some("Widget".into()),
        layer: None,
        index: None,
    }),
    instance: None,
    group: None,
};

let meas = MeasurementMap {
    mkey: Some(MeasuredElement::Text("firmware".into())),
    mval: MeasurementValuesMap {
        digests: Some(vec![Digest::new(7, vec![0xAA; 48])]),
        ..MeasurementValuesMap::default()
    },
    authorized_by: None,
};

let comid = ComidBuilder::new(TagIdChoice::Text("my-comid-tag".into()))
    .add_reference_triple(ReferenceTriple::new(env, vec![meas]))
    .build()
    .unwrap();

let bytes = CorimBuilder::new(CorimId::Text("my-corim".into()))
    .add_comid_tag(comid).unwrap()
    .build_bytes().unwrap();

let (_corim, _comids) = corim::validate::decode_and_validate(&bytes).unwrap();

Feature flags

For no_std, disable default features:

[dependencies]
corim = { version = "0.1", default-features = false }

Compliance

License

MIT