bank-client-js/lib/crypto-node.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());
    });
};
Object.defineProperty(exports, "__esModule", { value: true });
const { generateKeyPair, createPublicKey, createPrivateKey, createHash, createSign } = require('crypto');
const bs58 = require('bs58');
class CryptoNode {
    generateRsaKeyPair(bits) {
        return new Promise((resolve, reject) => {
            generateKeyPair('rsa', {
                modulusLength: bits,
                privateKeyEncoding: {
                    format: 'pem',
                    type: 'pkcs1',
                },
                publicKeyEncoding: {
                    format: 'pem',
                    type: 'spki',
                },
            }, (err, publicKey, privateKey) => {
                if (err) {
                    reject(err);
                    return;
                }
                resolve({
                    export: () => this.export(privateKey, publicKey),
                    getPublicHash: () => this.getPublicHash(publicKey),
                    getPublicKey: () => this.getPublicKey(publicKey),
                    sign: (data) => this.sign(privateKey, data),
                });
            });
        });
    }
    sign(privateKeyText, data) {
        return __awaiter(this, void 0, void 0, function* () {
            const privateKey = createPrivateKey(privateKeyText);
            const sign = createSign('SHA256');
            sign.write(data);
            sign.end();
            const signature = sign.sign(privateKey, 'hex');
            return signature;
        });
    }
    importRsaKeyPair(serialized) {
        return __awaiter(this, void 0, void 0, function* () {
            const { privateKey, publicKey } = JSON.parse(bs58.decode(serialized));
            return {
                export: () => this.export(privateKey, publicKey),
                getPublicHash: () => this.getPublicHash(publicKey),
                getPublicKey: () => this.getPublicKey(publicKey),
                sign: (data) => this.sign(privateKey, data),
            };
        });
    }
    getPublicHash(publicKeyText) {
        const publicKey = createPublicKey(publicKeyText);
        const derBytes = publicKey.export({
            type: 'spki',
            format: 'der'
        });
        const sha256 = createHash('sha256');
        sha256.update(derBytes);
        const pubHash = bs58.encode(sha256.digest());
        return pubHash;
    }
    getPublicKey(publicKeyText) {
        const publicKey = createPublicKey(publicKeyText);
        const derBytes = publicKey.export({
            type: 'spki',
            format: 'der'
        });
        return derBytes.toString('hex');
    }
    export(privateKey, publicKey) {
        return __awaiter(this, void 0, void 0, function* () {
            const jsonString = JSON.stringify({ privateKey, publicKey });
            return bs58.encode(Buffer.from(jsonString, 'utf-8'));
        });
    }
}
exports.CryptoNode = CryptoNode;
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