@tanglelabs/resolver-did-key
Version:
Fork of Sphereon did:key resolver with BBS+/BLS and EBSI support.
88 lines • 3.57 kB
JavaScript
;
// Brent Shambaugh <brent.shambaugh@gmail.com>. 2021.
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.keyToDidDoc = keyToDidDoc;
exports.pubKeyBytesToXY = pubKeyBytesToXY;
var u8a = __importStar(require("uint8arrays"));
var nist_weierstrauss = __importStar(require("nist-weierstrauss"));
/**
* Constructs the document based on the method key
*/
function keyToDidDoc(_a) {
var pubKeyBytes = _a.pubKeyBytes, fingerprint = _a.fingerprint;
var did = "did:key:".concat(fingerprint);
var keyId = "".concat(did, "#").concat(fingerprint);
var key = pubKeyBytesToXY(pubKeyBytes);
return {
id: did,
verificationMethod: [
{
id: keyId,
type: 'JsonWebKey2020',
controller: did,
publicKeyJwk: {
kty: 'EC',
crv: 'P-521',
x: key.xm,
y: key.ym,
},
},
],
authentication: [keyId],
assertionMethod: [keyId],
capabilityDelegation: [keyId],
capabilityInvocation: [keyId],
};
}
/**
*
* @param pubKeyBytes - public key as compressed with 0x02 prefix if even and 0x03 prefix if odd.
* @returns point x,y with coordinates as multibase encoded base64urls
*
* See the the did:key specification: https://w3c-ccg.github.io/did-method-key/#p-521.
* For compression see: https://tools.ietf.org/id/draft-jivsov-ecc-compact-05.html#rfc.section.3
* @throws TypeError: input cannot be null or undefined.
* @throws Error: Unexpected pubKeyBytes
* @internal
*/
function pubKeyBytesToXY(pubKeyBytes) {
if (!nist_weierstrauss.nist_weierstrauss_common.testUint8Array(pubKeyBytes)) {
throw new TypeError('input must be a Uint8Array');
}
var publicKeyHex = nist_weierstrauss.nist_weierstrauss_common.pubKeyBytesToHex(pubKeyBytes);
// compressed p-521 key, SEC format
// publicKeyHex.length / 2.0 = 67.0 bytes
if (132 <= publicKeyHex.length && publicKeyHex.length <= 134) {
if (publicKeyHex.slice(0, 2) == '03' || publicKeyHex.slice(0, 2) == '02') {
var publicKey = u8a.fromString(publicKeyHex, 'base16');
var point = nist_weierstrauss.secp521r1.ECPointDecompress(publicKey);
return nist_weierstrauss.nist_weierstrauss_common.publicKeyIntToXY(point);
}
}
throw new Error('Unexpected pubKeyBytes');
}
exports.default = { keyToDidDoc: keyToDidDoc };
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