Awesome

Decentralized Identifier client CLI (did-cli)

A command line client for managing DIDs, VCs, zCaps, and corresponding cryptographic key pairs.

Background
Install
Usage
Contribute
Commercial Support
License

Background

Features

Create and store Ed25519 cryptographic key pairs (useful for DIDs, VCs, zCaps and more).
Generate secret key seeds (for easier storage and management).
Create and store Decentralized Identifiers (DIDs) v1.0. Supported DID methods:
- did:key
- did:web
- Coming Soon: Veres One did:v (capybara testnet)
Generate Anchored Resources (hashlinks)
Generate and delegate Authorization Capabilities (zCaps)

File System Backed Wallet Included

Just as your SSH keys are typically stored in your ~/.ssh/ folder, did-cli stores your keys and DID Documents in ~/.wallet/ (by default).

Install

Requires Node.js >= v14.

Install in a development directory:

npm install did-cli
./node_modules/.bin/did ...

Install globally:

npm install -g did-cli
did ...

Run from npx:

npx did-cli ...

Usage

Help is available with the --help/-h command line option:

./did -h
./did COMMAND -h

Storage / Wallet Commands

Add a --save argument to any generate/create command, to save the created object (key pair, DID Document, zCap, etc) to your local file-based storage (stored in ~/.wallet/ folder).

For example, to generate a new did:web DID Document (and corresponding key pairs), and save it locally:

./did id generate --method web --save

Decentralized Identifiers (DIDs)

`did:key` Method

To generate a new did:key DID:

./did id create

./did id generate

Options:

method - Supported methods: 'key' (did:key). Default: 'key'.

Examples:

./did id generate
{
  "id": "did:key:z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR",
  "secretKeySeed": "z1AZK4h5w5YZkKYEgqtcFfvSbWQ3tZ3ZFgmLsXMZsTVoeK7",
  "didDocument": {
    "@context": [
      "https://www.w3.org/ns/did/v1",
      "https://w3id.org/security/suites/ed25519-2020/v1",
      "https://w3id.org/security/suites/x25519-2020/v1"
    ],
    "id": "did:key:z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR",
    "verificationMethod": [
      {
        "id": "did:key:z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR#z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR",
        "type": "Ed25519VerificationKey2020",
        "controller": "did:key:z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR",
        "publicKeyMultibase": "z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR"
      }
    ],
    "authentication": [
      "did:key:z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR#z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR"
    ],
    "assertionMethod": [
      "did:key:z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR#z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR"
    ],
    "capabilityDelegation": [
      "did:key:z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR#z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR"
    ],
    "capabilityInvocation": [
      "did:key:z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR#z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR"
    ],
    "keyAgreement": [
      {
        "id": "did:key:z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR#z6LSiMBrnXGbSJ6ZGQ3yRu8F8y75oR85fpq6NBrxHUjB4M3A",
        "type": "X25519KeyAgreementKey2020",
        "controller": "did:key:z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR",
        "publicKeyMultibase": "z6LSiMBrnXGbSJ6ZGQ3yRu8F8y75oR85fpq6NBrxHUjB4M3A"
      }
    ]
  }
}

If you have a secret key seed already, set the SECRET_KEY_SEED env variable, and the DID will be deterministically generated from it:

SECRET_KEY_SEED=z1AZK4h5w5YZkKYEgqtcFfvSbWQ3tZ3ZFgmLsXMZsTVoeK7 ./did id generate
// same as previous example

`did:web` Method

To create a new did:web DID Document that is intended to live at https://example.com/.well-known/did.json:

./did id generate --method web --url https://example.com
{
  "id": "did:web:example.com",
  "didDocument": {
    "@context": [
      "https://www.w3.org/ns/did/v1",
      "https://w3id.org/security/suites/ed25519-2020/v1",
      "https://w3id.org/security/suites/x25519-2020/v1"
    ],
    "id": "did:web:example.com",
    "assertionMethod": [
      {
        "id": "did:web:example.com#z6Mkmu3vV9Ncct2Y7Pfuf6s2uUkKmhPkzFttVbeD2HsfrtGp",
        "type": "Ed25519VerificationKey2020",
        "controller": "did:web:example.com",
        "publicKeyMultibase": "z6Mkmu3vV9Ncct2Y7Pfuf6s2uUkKmhPkzFttVbeD2HsfrtGp"
      }
    ]
  }
}

Note that by default, only one key pair is generated as part of DID Document creation, and is assigned to the assertionMethod verification relationship.

To add authorization for additional key usage (for example, to add an authentication section), the easiest way currently is to edit the DID Doc manually. For example, you can edit the initial DID Document generated above, and add support for authentication to the same key that's used for signing VCs (assertionMethod).

{
    "@context": [
      "https://www.w3.org/ns/did/v1",
      "https://w3id.org/security/suites/ed25519-2020/v1",
      "https://w3id.org/security/suites/x25519-2020/v1"
    ],
    "id": "did:web:example.com",
    "assertionMethod": [
      {
        "id": "did:web:example.com#z6Mkmu3vV9Ncct2Y7Pfuf6s2uUkKmhPkzFttVbeD2HsfrtGp",
        "type": "Ed25519VerificationKey2020",
        "controller": "did:web:example.com",
        "publicKeyMultibase": "z6Mkmu3vV9Ncct2Y7Pfuf6s2uUkKmhPkzFttVbeD2HsfrtGp"
      }
    ],
    "authentication": [
      "did:web:example.com#z6Mkmu3vV9Ncct2Y7Pfuf6s2uUkKmhPkzFttVbeD2HsfrtGp",
    ]
}

zCaps (Authorization Capabilities)

Creating a Root zCap

To create a root zcap that allows all actions to for the https://example.com/api URL:

ZCAP_CONTROLLER_KEY_SEED=z1AZK4h5w5YZkKYEgqtcFfvSbWQ3tZ3ZFgmLsXMZsTVoeK7 \
  ./did zcap create \
  --controller 'did:key:z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR' \
  --url 'https://example.com/api'
{
  "rootCapability": {
    "@context": [
      "https://w3id.org/zcap/v1",
      "https://w3id.org/security/suites/ed25519-2020/v1"
    ],
    "id": "urn:zcap:root:https%3A%2F%2Fexample.com%2Fapi",
    "controller": "did:key:z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR",
    "invocationTarget": "https://example.com/api"
  },
  "encoded": "zDWWVahKWhXpe9vYhuSeaRYDZradgnuhfJUnQGAGdbsXRPbD16AsJq6no2b9iHjZGqRfKSWRz9gGer1uJfwG5awKshKhWVuBK5fRJTwN54G4MRAhbMJsUKvwC1VYto5gkNEcoNqvFWNSgucumD4vzarDfDfyXG6BXFbk2SN314p5vgPPEkxkWkqyWdMcWAoFDJcYFK5WGdwKxs2xsZazJgPk8aJrtPRKvSVVQUb2i5qLguZn21JNuk6sNrC4SPhcskkbsEEctMzpxVr75qLX9zWGEaJwgCdZDPGwS4YKuvgHbRW6jU7wVUoTcFNSzevhK3hAswXDzNZp7kmAxJMZBtaBhoeTV9tG75DX1ek"
}

Note that root capabilities do not have an allowedAction property -- all actions are allowed for root zcaps.

Delegating a zCap

To delegate an authorization capability:

export ADMIN_DID=did:key:z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR
export ADMIN_SECRET_KEY_SEED=z1AZK4h5w5YZkKYEgqtcFfvSbWQ3tZ3ZFgmLsXMZsTVoeK7
export TEACHER_DID=did:key:z6MknBxrctS4KsfiBsEaXsfnrnfNYTvDjVpLYYUAN6PX2EfG

ZCAP_CONTROLLER_KEY_SEED=$ADMIN_SECRET_KEY_SEED ./did zcap delegate \
  --delegatee $TEACHER_DID \
  --url https://example.com/documents \
  --controller $ADMIN_DID \
  --allow read
{
  "delegatedCapability": {
    "@context": [
      "https://w3id.org/zcap/v1",
      "https://w3id.org/security/suites/ed25519-2020/v1"
    ],
    "id": "urn:zcap:delegated:z9gLKoFmKHwhxCzmo91Ywnh",
    "parentCapability": "urn:zcap:root:https%3A%2F%2Fexample.com%2Fdocuments",
    "invocationTarget": "https://example.com/documents",
    "controller": "did:key:z6MknBxrctS4KsfiBsEaXsfnrnfNYTvDjVpLYYUAN6PX2EfG",
    "expires": "2022-11-28T20:53:06Z",
    "allowedAction": [
      "read"
    ],
    "proof": {
      "type": "Ed25519Signature2020",
      "created": "2021-11-28T20:53:06Z",
      "verificationMethod": "did:key:z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR#z6Mkfeco2NSEPeFV3DkjNSabaCza1EoS3CmqLb1eJ5BriiaR",
      "proofPurpose": "capabilityDelegation",
      "capabilityChain": [
        "urn:zcap:root:https%3A%2F%2Fexample.com%2Fdocuments"
      ],
      "proofValue": "z244yxzRuFMyGfK85QcE6UewEZ3JpGDDTCvBKuxNiwdnxF3AmsSAoVYTBPLvFpYV7SeeWB4tUBGMGTF7pka6xR3av"
    }
  },
  "encoded": "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"
}

# Further delegation (a teacher can delegate the previous zCap to a student, 
# for example)
export TEACHER_DID=did:key:z6MknBxrctS4KsfiBsEaXsfnrnfNYTvDjVpLYYUAN6PX2EfG
export TEACHER_SECRET_KEY_SEED=z1AWjKsCFB3kjcMVyuau6cg9bDeDTnKYnrkriGen6x3t7rF
export STUDENT_DID=did:key:z6MksBBhHUrjje3rLoLdJozNo7y29vTBCLL3TUvKP7peEtgC

ZCAP_CONTROLLER_KEY_SEED=$TEACHER_SECRET_KEY_SEED ./did zcap delegate \
--delegatee $STUDENT_DID --invocationTarget 'https://example.com/documents/chemistry/101' \
--controller $TEACHER_DID --allow read \
--capability 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

{
  "delegatedCapability": {
    "@context": [
      "https://w3id.org/zcap/v1",
      "https://w3id.org/security/suites/ed25519-2020/v1"
    ],
    "id": "urn:zcap:delegated:zDdT5FfnQnpifMEJf8v3enk",
    "parentCapability": "urn:zcap:delegated:z9gLKoFmKHwhxCzmo91Ywnh",
    "invocationTarget": "https://example.com/documents/chemistry/101",
    "controller": "did:key:z6MksBBhHUrjje3rLoLdJozNo7y29vTBCLL3TUvKP7peEtgC",
    "expires": "2022-11-28T21:05:46Z",
    "allowedAction": [
      "read"
    ],
    "proof": {
      "type": "Ed25519Signature2020",
      "created": "2021-11-28T21:05:46Z",
      "verificationMethod": "did:key:z6MknBxrctS4KsfiBsEaXsfnrnfNYTvDjVpLYYUAN6PX2EfG#z6MknBxrctS4KsfiBsEaXsfnrnfNYTvDjVpLYYUAN6PX2EfG",
      "proofPurpose": "capabilityDelegation",
      "capabilityChain": [
        "urn:zcap:root:https%3A%2F%2Fexample.com%2Fdocuments",
        "urn:zcap:delegated:z9gLKoFmKHwhxCzmo91Ywnh"
      ],
      "proofValue": "zzMhvR6puq3ma3HrVag9mvh2VQokogT9D54BaXB93J3TM8CDhMxk67FpfReJrNNeMEucndoxwB7pF9bM59qgPAqB"
    }
  },
  "encoded": "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"
}

Key Pairs

Generating a Key Pair

To generate a new public/private key pair:

 ./did key create
{
  "secretKeySeed": "z1AhV1bADy7RepJ64mvH7Kk7htFNGc7EA1WA5nGzLSTWc6o",
  "keyPair": {
    "type": "Ed25519VerificationKey2020",
    "@context": "https://w3id.org/security/suites/ed25519-2020/v1",
    "publicKeyMultibase": "z6MkmDMjfkjs9XPCN1LfoQQRHz1mJ8PEdiVYC66XKhj3wGyB",
    "privateKeyMultibase": "zrv3wmB9AVHitGUTEf9MVMB6afscXMmzGY7hwuYL5gZZdspFr2DDrTA97qzZS6T1MsJM4mTKVWQWkjY5asc8FBppKt9"
  }
}

If you have a secret key seed already, set the SECRET_KEY_SEED env variable, and the key pair will be deterministically generated from it:

SECRET_KEY_SEED=z1Ajrg3wpDYiKS1EKAZKDd8qwR5mG3wKvh6gYi5YEz9T89P ./did key create
{
  "secretKeySeed": "z1Ajrg3wpDYiKS1EKAZKDd8qwR5mG3wKvh6gYi5YEz9T89P",
  "keyPair": {
    "type": "Ed25519VerificationKey2020",
    "@context": "https://w3id.org/security/suites/ed25519-2020/v1",
    "publicKeyMultibase": "z6Mkf9XLrKqb6kch96MU61aciKrnQwQmBnFw9MGpyqHor81V",
    "privateKeyMultibase": "zrv4ef4DVKCmCzy9733LKCnghDP1mytArm7Jddtnq54M1sVThc95bxJ2H4TiuWXRChjGHWtocqKciPrnqUBAatLUKqq"
  }
}

Anchored Resources

Parameters:

Input: Either pass in a --file parameter, pipe something in via stdin, or provide a --url parameter (which will be fetched).
--file, -f - Optional input file containing the resource to be anchored/hashed.
--canonicalize - Optional canonicalizationAlgorithm value. The resource to be anchored will first be canonicalized with this algorithm. For JSON or JSON-LD type resources, the default algorithm is jcs.
url - Optional URL parameter for the anchored resource. If no input --file or stin value is specified, the CLI will attempt to retrieve the resource at the url.
Id: If a url param is provided, it will be used as the anchoredResource.id. Otherwise, the CLI will use the id property of the input resource. If neither exists (or if the resource is not a JSON object), no id will be used.

Creating an `anchoredResource`

To create an anchored resource (which includes a content hash and a canonicalization algorithm):

./did anchor create -f example-vc.json --canonicalize jcs
{
  "anchoredResource": {
    "id": "<id of the object in example-vc.json>",
    "contentHash": {
      "digestMultibase": "zQmZAhmdLBtYKEwWe5zTXx2NL4oQPKtZdRAyXAm5ThAD3Kw"
      "canonicalizationAlgorithm": "jcs"
    }
  }
}

From URL:

./did anchor create --url 'https://w3id.org/security/v1'
{
  "anchoredResource": {
    "id": "https://w3id.org/security/v1",
    "contentHash": {
      "digestMultibase": "zQmdfTbBqBPQ7VNxZEYEj14VmRuZBkqFbiwReogJgS1zR1n",
      "canonicalizationAlgorithm": "jcs"
    }
  }
}

# hashing an image
./did anchor create --url 'https://via.placeholder.com/300.png'
{
  "anchoredResource": {
    "id": "https://via.placeholder.com/300.png",
    "contentHash": {
      "digestMultibase": "zQmZAhmdLBtYKEwWe5zTXx2NL4oQPKtZdRAyXAm5ThAD3Kw"
    }
  }
}

From stdin:

cat package.json | ./did anchor create
{
  "anchoredResource": {
    "contentHash": {
      "digestMultibase": "zQmdfTbBqBPQ7VNxZEYEj14VmRuZBkqFbiwReogJgS1zR1n",
      "canonicalizationAlgorithm": "jcs"
    }
  }
}

Verifying an `anchoredResource`

./did anchor verify -f example-vc.json --contentHash z1Aaj5A4UCsdMpXwdYAReXa4bxWYiKJtdAvB1zMzCHtCbtD
{
  "verified": true
}
# or
{
  "verified": false,
  "error": "Provided content hash does not match the hash of the resource."
}

Contribute

See the contribute file!

PRs accepted.

If editing the Readme, please conform to the standard-readme specification.

Commercial Support

Commercial support for this library is available upon request from Digital Bazaar: support@digitalbazaar.com