dpp-crypto

Cryptographic primitives for the Odal Node Digital Product Passport system: Ed25519 key management, JWS signing and verification, AES-256-GCM field-level encryption, did:web document builder, W3C Verifiable Credentials, and the ESPR Art. 10 access-tier policy engine.

When to use this crate

You need to sign or verify DPP data with Ed25519.
You are issuing or verifying W3C Verifiable Credentials for supply-chain actors.
You need to enforce read-access tiers (Public / Professional / Confidential) on passport fields per ESPR Article 10.
You are building a did:web identity for a manufacturer or operator.

Example

use dpp_crypto::credential::{CredentialBuilder, CredentialRole, DppCredentialSubject};
use chrono::Utc;

let subject = DppCredentialSubject {
    id: "did:web:repairer.greenfix.de".into(),
    name: "GreenFix Repair GmbH".into(),
    role: CredentialRole::AuthorisedRepairer,
    country: "DE".into(),
    sectors: vec!["textile".into()],
    product_categories: vec![],
};

let credential = CredentialBuilder::new(
    "did:web:authority.trade-registry.europa.eu".into(),
    subject,
)
.expires_in_days(365)
.build();

Relationship to other crates

Crate	Role
`dpp-domain`	Provides `AccessTier` and `IdentityPort` — required by this crate

Minimum Rust version

1.96 (MSRV is enforced in CI)

License