didself 2.1

A did:self implementation

A python implementation of did:self

This is a python implementation of the did:self method

Usage

This library can be used for Creating, Reading, or Updating a did:self DID. These operations are supported by an auxiliary script called the self registry.

Self registry preparation

Before any operation, a did:self a self registry must be configured with the user's key pair, encoded in JWK. An example of registry initialization is the following

# Generate DID and initial secret key
did_key = jwk.JWK.generate(kty='EC', crv='P-256')
# Initialize registry
owner_registry = registry.DIDSelfRegistry(did_key)

Create

A did:self DID is is the thumbprint of a JWK as defined in RFC 7638. In order to create a did:self DID, a user must generate the corresponding key-pair, create a DID document, and invoke the create method of the DID registry. An example of this process follows

did_key_dict = did_key.export_public(as_dict=True)
did = "did:self:" + did_key.thumbprint()
did_document = {
    'id': did,
    'authentication': [{
        'id': '#key1',
        'type': "JsonWebKey2020",
        'publicKeyJwk': did_key_dict
    }],  
}

owner_registry.create(did_document)

Read

By invoking the read operation of the registry a user obtains the DID document and the proof.

Update

A DID document can be simply updated by invoking the update method of the registry, providing as input the new DID document. For example:

authentication_jwk = jwk.JWK.generate(kty='OKP', crv='Ed25519')
did_document = {
    'id': did,
    'authentication': [{
        'id': did + '#key2',
        'type': "JsonWebKey2020",
        'publicKeyJwk': authentication_jwk.export_public(as_dict=True)
    }]
}
owner_registry.update(did_document)