dag-jose-utils

This library provides utilities for using the DAG-JOSE IPLD codec. It uses DAG-CBOR to encode payloads and cleartexts to CIDs.

Installation

First install the package

$ npm i --save dag-jose-utils

Importing

import {
  encodePayload,
  prepareCleartext,
  decodeCleartext,
  encodeIdentityCID,
  decodeIdentityCID,
  toJWSPayload,
  toJWSStrings
} from 'dag-jose-utils'

API

EncodedPayload

interface EncodedPayload {
  cid: CID
  linkedBlock: Uint8Array
}

encodePayload(payload: Record<string, any>): Promise

Prepares a payload to be signed in a JWS. Note that you will need to encode the encodePayload.cid.bytes as base64url before signing.

prepareCleartext(cleartext: Record<string, any>, blockSize?: number): Uint8Array

Prepares a cleartext object to be encrypted in a JWE. By default the blockSize for padding is 24.

decodeCleartext(b: Uint8Array): Record<string, any>

Decode a decrypted cleartext to an ipld object.

encodeIdentityCID(obj: Record<string, any>): CID

Encode an ipld object as a CID that uses the identity hash.

decodeIdentityCID(cid: CID): Record<string, any>

Decode an ipld object from a CID that uses the identity hash.

toJWSPayload(payload: EncodedPayload | CID): string

Transform an EncodedPayload (from encodePayload()) or a CID into a JWS string for use with createJWS() in did-jwt. The string form is simply the Base64url encoded form of the CID's byte representation.

toJWSStrings(jose: any): string[]

Transform a DagJWS object from ipld-dag-jose into an array of strings for each signature in the object. The strings can then be verified using verifyJWS() in did-jwt.

Maintainer

Joel Thorstensson

License

MIT or APACHE