104 lines
2.9 KiB
TypeScript
104 lines
2.9 KiB
TypeScript
import { CryptoService } from "jslib-common/abstractions/crypto.service";
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import { LogService } from "jslib-common/abstractions/log.service";
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import { StorageService } from "jslib-common/abstractions/storage.service";
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import { Utils } from "jslib-common/misc/utils";
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import { SymmetricCryptoKey } from "jslib-common/models/domain/symmetricCryptoKey";
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export class NodeEnvSecureStorageService implements StorageService {
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constructor(
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private storageService: StorageService,
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private logService: LogService,
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private cryptoService: () => CryptoService
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) {}
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async get<T>(key: string): Promise<T> {
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const value = await this.storageService.get<string>(this.makeProtectedStorageKey(key));
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if (value == null) {
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return null;
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}
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const obj = await this.decrypt(value);
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return obj as any;
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}
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async has(key: string): Promise<boolean> {
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return (await this.get(key)) != null;
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}
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async save(key: string, obj: any): Promise<any> {
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if (obj == null) {
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return this.remove(key);
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}
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if (obj !== null && typeof obj !== "string") {
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throw new Error("Only string storage is allowed.");
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}
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const protectedObj = await this.encrypt(obj);
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await this.storageService.save(this.makeProtectedStorageKey(key), protectedObj);
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}
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remove(key: string): Promise<any> {
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return this.storageService.remove(this.makeProtectedStorageKey(key));
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}
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private async encrypt(plainValue: string): Promise<string> {
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const sessionKey = this.getSessionKey();
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if (sessionKey == null) {
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throw new Error("No session key available.");
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}
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const encValue = await this.cryptoService().encryptToBytes(
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Utils.fromB64ToArray(plainValue).buffer,
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sessionKey
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);
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if (encValue == null) {
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throw new Error("Value didn't encrypt.");
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}
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return Utils.fromBufferToB64(encValue.buffer);
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}
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private async decrypt(encValue: string): Promise<string> {
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try {
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const sessionKey = this.getSessionKey();
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if (sessionKey == null) {
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return null;
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}
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const decValue = await this.cryptoService().decryptFromBytes(
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Utils.fromB64ToArray(encValue).buffer,
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sessionKey
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);
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if (decValue == null) {
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this.logService.info("Failed to decrypt.");
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return null;
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}
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return Utils.fromBufferToB64(decValue);
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} catch (e) {
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this.logService.info("Decrypt error.");
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return null;
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}
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}
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private getSessionKey() {
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try {
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if (process.env.BW_SESSION != null) {
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const sessionBuffer = Utils.fromB64ToArray(process.env.BW_SESSION).buffer;
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if (sessionBuffer != null) {
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const sessionKey = new SymmetricCryptoKey(sessionBuffer);
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if (sessionBuffer != null) {
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return sessionKey;
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}
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}
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}
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} catch (e) {
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this.logService.info("Session key is invalid.");
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}
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return null;
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}
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private makeProtectedStorageKey(key: string) {
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return "__PROTECTED__" + key;
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}
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}
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