@blockcerts/hashlink-verifier
Version:
Handling hashlinks in Blockcerts
169 lines (168 loc) • 6.6 kB
JavaScript
/*!
* Copyright (c) 2019 Digital Bazaar, Inc. All rights reserved.
*/
;
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if (k2 === undefined) k2 = k;
o[k2] = m[k];
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Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
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if (mod && mod.__esModule) return mod;
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if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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};
Object.defineProperty(exports, "__esModule", { value: true });
exports.MultibaseBase58btc = exports.MultihashBlake2b64 = exports.MultihashSha2256 = exports.Codec = void 0;
// @ts-expect-error not a TS package
const base58 = __importStar(require("base58-universal"));
const blakejs_1 = require("blakejs");
const crypto_1 = __importDefault(require("./crypto"));
const util_1 = require("./util");
class Codec {
}
exports.Codec = Codec;
class MultihashSha2256 extends Codec {
/**
* Creates a new MultihashSha2256 data codec.
*
* @returns {MultihashSha2256} A MultihashSha2256 used to encode and decode
* Multihash SHA-2 256-bit values.
*/
constructor() {
super();
this.identifier = new Uint8Array([0x12, 0x20]);
this.algorithm = 'mh-sha2-256';
this.name = 'sha2-256';
}
/**
* Encoder that takes a Uint8Array as input and performs a SHA-2
* cryptographic hash on the data and outputs a multihash-encoded value.
*
* @param {Uint8Array} input - The input for the encode function.
*
* @returns {Uint8Array} The output of the encode function.
*/
encode(input) {
return __awaiter(this, void 0, void 0, function* () {
const sha2256 = new Uint8Array(yield crypto_1.default.subtle.digest({ name: 'SHA-256' }, input));
const mhsha2256 = new Uint8Array(sha2256.byteLength + this.identifier.byteLength);
mhsha2256.set(this.identifier, 0);
mhsha2256.set(sha2256, this.identifier.byteLength);
return mhsha2256;
});
}
decode(input) {
return input.slice(this.identifier.length);
}
}
exports.MultihashSha2256 = MultihashSha2256;
class MultihashBlake2b64 extends Codec {
/**
* Creates a new MultihashBlake2b64 data codec.
*
* @returns {MultihashBlake2b64} A MultihashBlake2b64 used to encode and
* decode Multihash Blake2b 64-bit values.
*/
constructor() {
super();
this.identifier = new Uint8Array([0xb2, 0x08, 0x08]);
this.algorithm = 'mh-blake2b-64';
this.name = 'blake2b-64';
}
/**
* Encoder function that takes a Uint8Array as input and performs a blake2b
* cryptographic hash on the data and outputs a multihash-encoded value.
*
* @param {Uint8Array} input - The input for the encode function.
*
* @returns {Uint8Array} The output of the encode function.
*/
encode(input) {
return __awaiter(this, void 0, void 0, function* () {
const blake2b64 = (0, blakejs_1.blake2b)(input, null, 8);
const mhblake2b64 = new Uint8Array(blake2b64.byteLength + this.identifier.byteLength);
mhblake2b64.set(this.identifier, 0);
mhblake2b64.set(blake2b64, this.identifier.byteLength);
return mhblake2b64;
});
}
decode(input) {
return input.slice(this.identifier.length);
}
}
exports.MultihashBlake2b64 = MultihashBlake2b64;
class MultibaseBase58btc extends Codec {
/**
* Creates a new MultibaseBase58btc data codec.
*
* @returns {MultibaseBase58btc} A MultibaseBase58btc used to encode and
* decode Multibase base58btc values.
*/
constructor() {
super();
this.identifier = new Uint8Array([0x7a]);
this.algorithm = 'mb-base58-btc';
this.name = 'base58-btc';
}
/**
* Encoder function that takes a Uint8Array as input and performs a multibase
* base58btc encoding on the data.
*
* @param {Uint8Array} input - The input for the encode function.
*
* @returns {Uint8Array} The output of the encode function.
*/
encode(input) {
return __awaiter(this, void 0, void 0, function* () {
return new Uint8Array((0, util_1.stringToUint8Array)('z' + base58.encode(input)));
});
}
/**
* Decoder function that takes a Uint8Array as input and performs a multibase
* base58btc decode on the data.
*
* @param {Uint8Array} input - The input for the decode function.
*
* @returns {Uint8Array} The output of the decode function.
*/
decode(input) {
return base58.decode(new TextDecoder('utf-8').decode(input.slice(1)));
}
}
exports.MultibaseBase58btc = MultibaseBase58btc;