bank-client-js/lib/crypto-forge.js

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const bs58_1 = __importDefault(require("bs58"));
const node_forge_1 = require("node-forge");
function byteBufferToNumericArray(digested) {
    const count = digested.length();
    const arr = [];
    for (let i = 0; i < count; i++) {
        arr.push(digested.getByte());
    }
    return arr;
}
class CryptoForge {
    generateRsaKeyPair(bits) {
        return new Promise((resolve, reject) => {
            node_forge_1.pki.rsa.generateKeyPair({ bits, workers: 2 }, (err, { privateKey, publicKey }) => {
                if (err) {
                    reject(err);
                    return;
                }
                this.export(privateKey, publicKey).then(generated => {
                    // tslint:disable-next-line:no-console
                    console.log('generated keypair', generated);
                });
                resolve({
                    export: () => this.export(privateKey, publicKey),
                    getPublicHash: () => this.getPublicHash(publicKey),
                    getPublicKey: () => this.getPublicKey(publicKey),
                    sign: (data) => this.sign(privateKey, data),
                });
            });
        });
    }
    sign(privateKeyObj, dataHexBytes) {
        return __awaiter(this, void 0, void 0, function* () {
            const sha256 = node_forge_1.md.sha256.create();
            const buf = node_forge_1.util.hexToBytes(dataHexBytes);
            sha256.update(buf);
            const signature = privateKeyObj.sign(sha256);
            const hexed = node_forge_1.util.bytesToHex(signature);
            return hexed;
        });
    }
    importRsaKeyPair(serialized) {
        return __awaiter(this, void 0, void 0, function* () {
            const { privateKey, publicKey } = JSON.parse(bs58_1.default.decode(serialized).toString('utf-8'));
            const privateKeyObj = node_forge_1.pki.privateKeyFromPem(privateKey);
            const publicKeyObj = node_forge_1.pki.publicKeyFromPem(publicKey);
            return {
                export: () => this.export(privateKeyObj, publicKeyObj),
                getPublicHash: () => this.getPublicHash(publicKeyObj),
                getPublicKey: () => this.getPublicKey(publicKeyObj),
                sign: (data) => this.sign(privateKeyObj, data),
            };
        });
    }
    getPublicHash(publicKeyObj) {
        const publicKeyHexString = this.getPublicKey(publicKeyObj);
        const sha256 = node_forge_1.md.sha256.create();
        const buf = node_forge_1.util.hexToBytes(publicKeyHexString);
        sha256.update(buf);
        const digested = sha256.digest();
        const arr = byteBufferToNumericArray(digested);
        const pubHash = bs58_1.default.encode(arr);
        return pubHash;
    }
    getPublicKey(publicKeyObj) {
        const pk = node_forge_1.asn1.toDer(node_forge_1.pki.publicKeyToAsn1(publicKeyObj)).toHex();
        return pk;
    }
    export(privateKeyObj, publicKeyObj) {
        return __awaiter(this, void 0, void 0, function* () {
            const privateKey = node_forge_1.pki.privateKeyToPem(privateKeyObj);
            const publicKey = node_forge_1.pki.publicKeyToPem(publicKeyObj);
            const jsonString = JSON.stringify({ privateKey, publicKey });
            const uint8Array = node_forge_1.util.text.utf8.encode(jsonString);
            return bs58_1.default.encode(uint8Array);
        });
    }
}
exports.default = CryptoForge;
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