did-common

A rust library for parsing Decentralized Identifiers (DIDs) following the DID specification by the W3C.

Usage: DID

Add this to your Cargo.toml:

[dependencies]
did_common = "^0.3"

and this to your crate root (if you're using Rust 2015):

extern crate did_common;

Here is how to to parse or validate a simple DID string:

use did_common::did::Did;

let did = Did::parse("did:example:123456789abcdefghi#keys-1").unwrap();

if Did::is_valid("did:ethr:0xf3beac30c498d9e26865f34fcaa57dbb935b0d74") {
  println!("DID is valid.");
}
// output: DID is valid.

You can also build a DID using a builder:

use did_common::did::DidBuilder;

let did =
  DidBuilder::new("example", "1234")
    .with_params(&[("service", Some("agent"))])
    .with_fragment("keys-1")
    .build();
println!("{}", did);
// output: did:example:1234;service=agent#keys-1

Usage: DID Document

Here is how to parse a DID Document:

use did_common::did_doc::DidDocument;
use did_common::json_parse;

let did_doc = DidDocument::parse(
  &json_parse(
  r#"
    {
      "@context": "https://www.w3.org/2019/did/v1",
      "id": "did:example:123456789abcdefghi",
      "created": "2002-10-10T17:00:00Z"
      "updated": "2002-10-10T17:00:00Z"
      "publicKey": [
        {
          "id": "did:example:123456789abcdefghi#keys-1",
          "type": "Secp256k1VerificationKey2018",
          "controller": "did:example:123456789abcdefghi",
          "publicKeyHex": "02b97c30de767f084ce3080168ee293053ba33b235d7116a3263d29f1450936b71"
        }
      ],
      "authentication": [
        {
          "id": "did:example:123456789abcdefghi#keys-2",
          "type": "Ed25519VerificationKey2018",
          "controller": "did:example:123456789abcdefghi",
          "publicKeyBase58": "H3C2AVvLMv6gmMNam3uVAjZpfkcJCwDwnZn6z3wXmqPV"
        }
      ]
      "service": [
        {
          "id": "did:example:123456789abcdefghi#openid",
          "type": "OpenIdConnectVersion1.0Service",
          "serviceEndpoint": "https://openid.example.com/"
        }
    }
  "#).unwrap()
);
println!("{}", did_doc.id());
// output: did:example:123456789abcdefghi

You can also build a DID Document using a builder:

use did_common::did_doc::DidDocumentBuilder;

let did_doc =
  DidDocumentBuilder::new("did:example:123456789abcdefghi")
    .with_pubkeys(vec![
        PublicKeyBuilder::new(
          "did:example:123456789abcdefghi#keys-1",
          PublicKeyType::EcdsaSecp256k1,
          "did:example:123456789abcdefghi"
        )
        .with_encoded_key(PublicKeyEncoded::Hex(
          "02b97c30de767f084ce3080168ee293053ba33b235d7116a3263d29f1450936b71"
        ))
        .build()
    ])
    .build();

let key = did_doc.pub_keys().first().unwrap();
println!("{}", key.id());
// output: did:example:123456789abcdefghi#keys-1

License

This project is licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.