970 lines
32 KiB
TypeScript
970 lines
32 KiB
TypeScript
import * as bigInt from "big-integer";
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import { CryptoService as CryptoServiceAbstraction } from "../abstractions/crypto.service";
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import { CryptoFunctionService } from "../abstractions/cryptoFunction.service";
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import { LogService } from "../abstractions/log.service";
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import { PlatformUtilsService } from "../abstractions/platformUtils.service";
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import { StateService } from "../abstractions/state.service";
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import { EncryptionType } from "../enums/encryptionType";
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import { HashPurpose } from "../enums/hashPurpose";
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import { KdfType } from "../enums/kdfType";
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import { KeySuffixOptions } from "../enums/keySuffixOptions";
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import { sequentialize } from "../misc/sequentialize";
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import { Utils } from "../misc/utils";
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import { EEFLongWordList } from "../misc/wordlist";
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import { EncArrayBuffer } from "../models/domain/encArrayBuffer";
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import { EncString } from "../models/domain/encString";
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import { EncryptedObject } from "../models/domain/encryptedObject";
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import { SymmetricCryptoKey } from "../models/domain/symmetricCryptoKey";
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import { ProfileOrganizationResponse } from "../models/response/profileOrganizationResponse";
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import { ProfileProviderOrganizationResponse } from "../models/response/profileProviderOrganizationResponse";
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import { ProfileProviderResponse } from "../models/response/profileProviderResponse";
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export class CryptoService implements CryptoServiceAbstraction {
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constructor(
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private cryptoFunctionService: CryptoFunctionService,
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protected platformUtilService: PlatformUtilsService,
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protected logService: LogService,
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protected stateService: StateService
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) {}
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async setKey(key: SymmetricCryptoKey, userId?: string): Promise<any> {
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await this.stateService.setCryptoMasterKey(key, { userId: userId });
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await this.storeKey(key, userId);
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}
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async setKeyHash(keyHash: string): Promise<void> {
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await this.stateService.setKeyHash(keyHash);
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}
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async setEncKey(encKey: string): Promise<void> {
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if (encKey == null) {
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return;
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}
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await this.stateService.setDecryptedCryptoSymmetricKey(null);
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await this.stateService.setEncryptedCryptoSymmetricKey(encKey);
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}
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async setEncPrivateKey(encPrivateKey: string): Promise<void> {
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if (encPrivateKey == null) {
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return;
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}
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await this.stateService.setDecryptedPrivateKey(null);
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await this.stateService.setEncryptedPrivateKey(encPrivateKey);
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}
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async setOrgKeys(
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orgs: ProfileOrganizationResponse[],
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providerOrgs: ProfileProviderOrganizationResponse[]
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): Promise<void> {
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const orgKeys: any = {};
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orgs.forEach((org) => {
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orgKeys[org.id] = org.key;
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});
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for (const providerOrg of providerOrgs) {
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// Convert provider encrypted keys to user encrypted.
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const providerKey = await this.getProviderKey(providerOrg.providerId);
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const decValue = await this.decryptToBytes(new EncString(providerOrg.key), providerKey);
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orgKeys[providerOrg.id] = (await this.rsaEncrypt(decValue)).encryptedString;
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}
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await this.stateService.setDecryptedOrganizationKeys(null);
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return await this.stateService.setEncryptedOrganizationKeys(orgKeys);
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}
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async setProviderKeys(providers: ProfileProviderResponse[]): Promise<void> {
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const providerKeys: any = {};
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providers.forEach((provider) => {
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providerKeys[provider.id] = provider.key;
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});
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await this.stateService.setDecryptedProviderKeys(null);
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return await this.stateService.setEncryptedProviderKeys(providerKeys);
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}
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async getKey(keySuffix?: KeySuffixOptions, userId?: string): Promise<SymmetricCryptoKey> {
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const inMemoryKey = await this.stateService.getCryptoMasterKey({ userId: userId });
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if (inMemoryKey != null) {
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return inMemoryKey;
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}
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keySuffix ||= KeySuffixOptions.Auto;
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const symmetricKey = await this.getKeyFromStorage(keySuffix, userId);
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if (symmetricKey != null) {
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// TODO: Refactor here so get key doesn't also set key
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this.setKey(symmetricKey, userId);
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}
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return symmetricKey;
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}
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async getKeyFromStorage(
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keySuffix: KeySuffixOptions,
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userId?: string
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): Promise<SymmetricCryptoKey> {
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const key = await this.retrieveKeyFromStorage(keySuffix, userId);
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if (key != null) {
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const symmetricKey = new SymmetricCryptoKey(Utils.fromB64ToArray(key).buffer);
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if (!(await this.validateKey(symmetricKey))) {
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this.logService.warning("Wrong key, throwing away stored key");
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await this.clearSecretKeyStore(userId);
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return null;
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}
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return symmetricKey;
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}
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return null;
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}
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async getKeyHash(): Promise<string> {
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return await this.stateService.getKeyHash();
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}
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async compareAndUpdateKeyHash(masterPassword: string, key: SymmetricCryptoKey): Promise<boolean> {
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const storedKeyHash = await this.getKeyHash();
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if (masterPassword != null && storedKeyHash != null) {
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const localKeyHash = await this.hashPassword(
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masterPassword,
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key,
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HashPurpose.LocalAuthorization
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);
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if (localKeyHash != null && storedKeyHash === localKeyHash) {
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return true;
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}
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// TODO: remove serverKeyHash check in 1-2 releases after everyone's keyHash has been updated
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const serverKeyHash = await this.hashPassword(
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masterPassword,
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key,
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HashPurpose.ServerAuthorization
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);
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if (serverKeyHash != null && storedKeyHash === serverKeyHash) {
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await this.setKeyHash(localKeyHash);
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return true;
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}
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}
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return false;
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}
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@sequentialize(() => "getEncKey")
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getEncKey(key: SymmetricCryptoKey = null): Promise<SymmetricCryptoKey> {
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return this.getEncKeyHelper(key);
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}
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async getPublicKey(): Promise<ArrayBuffer> {
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const inMemoryPublicKey = await this.stateService.getPublicKey();
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if (inMemoryPublicKey != null) {
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return inMemoryPublicKey;
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}
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const privateKey = await this.getPrivateKey();
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if (privateKey == null) {
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return null;
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}
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const publicKey = await this.cryptoFunctionService.rsaExtractPublicKey(privateKey);
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await this.stateService.setPublicKey(publicKey);
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return publicKey;
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}
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async getPrivateKey(): Promise<ArrayBuffer> {
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const decryptedPrivateKey = await this.stateService.getDecryptedPrivateKey();
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if (decryptedPrivateKey != null) {
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return decryptedPrivateKey;
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}
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const encPrivateKey = await this.stateService.getEncryptedPrivateKey();
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if (encPrivateKey == null) {
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return null;
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}
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const privateKey = await this.decryptToBytes(new EncString(encPrivateKey), null);
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await this.stateService.setDecryptedPrivateKey(privateKey);
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return privateKey;
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}
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async getFingerprint(userId: string, publicKey?: ArrayBuffer): Promise<string[]> {
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if (publicKey == null) {
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publicKey = await this.getPublicKey();
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}
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if (publicKey === null) {
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throw new Error("No public key available.");
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}
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const keyFingerprint = await this.cryptoFunctionService.hash(publicKey, "sha256");
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const userFingerprint = await this.cryptoFunctionService.hkdfExpand(
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keyFingerprint,
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userId,
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32,
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"sha256"
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);
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return this.hashPhrase(userFingerprint);
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}
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@sequentialize(() => "getOrgKeys")
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async getOrgKeys(): Promise<Map<string, SymmetricCryptoKey>> {
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const orgKeys: Map<string, SymmetricCryptoKey> = new Map<string, SymmetricCryptoKey>();
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const decryptedOrganizationKeys = await this.stateService.getDecryptedOrganizationKeys();
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if (decryptedOrganizationKeys != null && decryptedOrganizationKeys.size > 0) {
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return decryptedOrganizationKeys;
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}
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const encOrgKeys = await this.stateService.getEncryptedOrganizationKeys();
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if (encOrgKeys == null) {
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return null;
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}
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let setKey = false;
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for (const orgId in encOrgKeys) {
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// eslint-disable-next-line
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if (!encOrgKeys.hasOwnProperty(orgId)) {
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continue;
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}
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const decValue = await this.rsaDecrypt(encOrgKeys[orgId]);
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orgKeys.set(orgId, new SymmetricCryptoKey(decValue));
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setKey = true;
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}
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if (setKey) {
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await this.stateService.setDecryptedOrganizationKeys(orgKeys);
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}
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return orgKeys;
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}
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async getOrgKey(orgId: string): Promise<SymmetricCryptoKey> {
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if (orgId == null) {
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return null;
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}
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const orgKeys = await this.getOrgKeys();
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if (orgKeys == null || !orgKeys.has(orgId)) {
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return null;
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}
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return orgKeys.get(orgId);
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}
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@sequentialize(() => "getProviderKeys")
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async getProviderKeys(): Promise<Map<string, SymmetricCryptoKey>> {
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const providerKeys: Map<string, SymmetricCryptoKey> = new Map<string, SymmetricCryptoKey>();
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const decryptedProviderKeys = await this.stateService.getDecryptedProviderKeys();
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if (decryptedProviderKeys != null && decryptedProviderKeys.size > 0) {
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return decryptedProviderKeys;
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}
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const encProviderKeys = await this.stateService.getEncryptedProviderKeys();
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if (encProviderKeys == null) {
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return null;
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}
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let setKey = false;
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for (const orgId in encProviderKeys) {
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// eslint-disable-next-line
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if (!encProviderKeys.hasOwnProperty(orgId)) {
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continue;
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}
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const decValue = await this.rsaDecrypt(encProviderKeys[orgId]);
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providerKeys.set(orgId, new SymmetricCryptoKey(decValue));
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setKey = true;
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}
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if (setKey) {
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await this.stateService.setDecryptedProviderKeys(providerKeys);
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}
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return providerKeys;
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}
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async getProviderKey(providerId: string): Promise<SymmetricCryptoKey> {
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if (providerId == null) {
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return null;
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}
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const providerKeys = await this.getProviderKeys();
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if (providerKeys == null || !providerKeys.has(providerId)) {
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return null;
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}
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return providerKeys.get(providerId);
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}
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async hasKey(): Promise<boolean> {
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return (
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(await this.hasKeyInMemory()) ||
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(await this.hasKeyStored(KeySuffixOptions.Auto)) ||
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(await this.hasKeyStored(KeySuffixOptions.Biometric))
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);
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}
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async hasKeyInMemory(userId?: string): Promise<boolean> {
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return (await this.stateService.getCryptoMasterKey({ userId: userId })) != null;
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}
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async hasKeyStored(keySuffix: KeySuffixOptions, userId?: string): Promise<boolean> {
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switch (keySuffix) {
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case KeySuffixOptions.Auto:
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return (await this.stateService.getCryptoMasterKeyAuto({ userId: userId })) != null;
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case KeySuffixOptions.Biometric:
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return (await this.stateService.hasCryptoMasterKeyBiometric({ userId: userId })) === true;
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default:
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return false;
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}
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}
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async hasEncKey(): Promise<boolean> {
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return (await this.stateService.getEncryptedCryptoSymmetricKey()) != null;
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}
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async clearKey(clearSecretStorage = true, userId?: string): Promise<any> {
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await this.stateService.setCryptoMasterKey(null, { userId: userId });
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await this.stateService.setLegacyEtmKey(null, { userId: userId });
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if (clearSecretStorage) {
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await this.clearSecretKeyStore(userId);
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}
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}
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async clearStoredKey(keySuffix: KeySuffixOptions) {
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keySuffix === KeySuffixOptions.Auto
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? await this.stateService.setCryptoMasterKeyAuto(null)
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: await this.stateService.setCryptoMasterKeyBiometric(null);
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}
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async clearKeyHash(userId?: string): Promise<any> {
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return await this.stateService.setKeyHash(null, { userId: userId });
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}
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async clearEncKey(memoryOnly?: boolean, userId?: string): Promise<void> {
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await this.stateService.setDecryptedCryptoSymmetricKey(null, { userId: userId });
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if (!memoryOnly) {
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await this.stateService.setEncryptedCryptoSymmetricKey(null, { userId: userId });
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}
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}
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async clearKeyPair(memoryOnly?: boolean, userId?: string): Promise<any> {
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const keysToClear: Promise<void>[] = [
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this.stateService.setDecryptedPrivateKey(null, { userId: userId }),
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this.stateService.setPublicKey(null, { userId: userId }),
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];
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if (!memoryOnly) {
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keysToClear.push(this.stateService.setEncryptedPrivateKey(null, { userId: userId }));
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}
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return Promise.all(keysToClear);
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}
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async clearOrgKeys(memoryOnly?: boolean, userId?: string): Promise<void> {
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await this.stateService.setDecryptedOrganizationKeys(null, { userId: userId });
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if (!memoryOnly) {
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await this.stateService.setEncryptedOrganizationKeys(null, { userId: userId });
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}
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}
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async clearProviderKeys(memoryOnly?: boolean, userId?: string): Promise<void> {
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await this.stateService.setDecryptedProviderKeys(null, { userId: userId });
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if (!memoryOnly) {
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await this.stateService.setEncryptedProviderKeys(null, { userId: userId });
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}
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}
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async clearPinProtectedKey(userId?: string): Promise<any> {
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return await this.stateService.setEncryptedPinProtected(null, { userId: userId });
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}
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async clearKeys(userId?: string): Promise<any> {
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await this.clearKey(true, userId);
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await this.clearKeyHash(userId);
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await this.clearOrgKeys(false, userId);
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await this.clearProviderKeys(false, userId);
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await this.clearEncKey(false, userId);
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await this.clearKeyPair(false, userId);
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await this.clearPinProtectedKey(userId);
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}
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async toggleKey(): Promise<any> {
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const key = await this.getKey();
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await this.setKey(key);
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}
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async makeKey(
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password: string,
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salt: string,
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kdf: KdfType,
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kdfIterations: number
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): Promise<SymmetricCryptoKey> {
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let key: ArrayBuffer = null;
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if (kdf == null || kdf === KdfType.PBKDF2_SHA256) {
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if (kdfIterations == null) {
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kdfIterations = 5000;
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} else if (kdfIterations < 5000) {
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throw new Error("PBKDF2 iteration minimum is 5000.");
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}
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key = await this.cryptoFunctionService.pbkdf2(password, salt, "sha256", kdfIterations);
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} else {
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throw new Error("Unknown Kdf.");
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}
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return new SymmetricCryptoKey(key);
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}
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async makeKeyFromPin(
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pin: string,
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salt: string,
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kdf: KdfType,
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kdfIterations: number,
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protectedKeyCs: EncString = null
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): Promise<SymmetricCryptoKey> {
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if (protectedKeyCs == null) {
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const pinProtectedKey = await this.stateService.getEncryptedPinProtected();
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if (pinProtectedKey == null) {
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throw new Error("No PIN protected key found.");
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}
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protectedKeyCs = new EncString(pinProtectedKey);
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}
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const pinKey = await this.makePinKey(pin, salt, kdf, kdfIterations);
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const decKey = await this.decryptToBytes(protectedKeyCs, pinKey);
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return new SymmetricCryptoKey(decKey);
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}
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async makeShareKey(): Promise<[EncString, SymmetricCryptoKey]> {
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const shareKey = await this.cryptoFunctionService.randomBytes(64);
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const publicKey = await this.getPublicKey();
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const encShareKey = await this.rsaEncrypt(shareKey, publicKey);
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return [encShareKey, new SymmetricCryptoKey(shareKey)];
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}
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async makeKeyPair(key?: SymmetricCryptoKey): Promise<[string, EncString]> {
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const keyPair = await this.cryptoFunctionService.rsaGenerateKeyPair(2048);
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const publicB64 = Utils.fromBufferToB64(keyPair[0]);
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const privateEnc = await this.encrypt(keyPair[1], key);
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return [publicB64, privateEnc];
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}
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async makePinKey(
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pin: string,
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salt: string,
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kdf: KdfType,
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kdfIterations: number
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): Promise<SymmetricCryptoKey> {
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const pinKey = await this.makeKey(pin, salt, kdf, kdfIterations);
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return await this.stretchKey(pinKey);
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}
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async makeSendKey(keyMaterial: ArrayBuffer): Promise<SymmetricCryptoKey> {
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const sendKey = await this.cryptoFunctionService.hkdf(
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keyMaterial,
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"bitwarden-send",
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"send",
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64,
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"sha256"
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);
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return new SymmetricCryptoKey(sendKey);
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}
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async hashPassword(
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password: string,
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key: SymmetricCryptoKey,
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hashPurpose?: HashPurpose
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): Promise<string> {
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if (key == null) {
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key = await this.getKey();
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}
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if (password == null || key == null) {
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throw new Error("Invalid parameters.");
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}
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const iterations = hashPurpose === HashPurpose.LocalAuthorization ? 2 : 1;
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const hash = await this.cryptoFunctionService.pbkdf2(key.key, password, "sha256", iterations);
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return Utils.fromBufferToB64(hash);
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}
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async makeEncKey(key: SymmetricCryptoKey): Promise<[SymmetricCryptoKey, EncString]> {
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const theKey = await this.getKeyForEncryption(key);
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const encKey = await this.cryptoFunctionService.randomBytes(64);
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return this.buildEncKey(theKey, encKey);
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}
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async remakeEncKey(
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key: SymmetricCryptoKey,
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encKey?: SymmetricCryptoKey
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): Promise<[SymmetricCryptoKey, EncString]> {
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if (encKey == null) {
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encKey = await this.getEncKey();
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}
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return this.buildEncKey(key, encKey.key);
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}
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async encrypt(plainValue: string | ArrayBuffer, key?: SymmetricCryptoKey): Promise<EncString> {
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if (plainValue == null) {
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return Promise.resolve(null);
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}
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let plainBuf: ArrayBuffer;
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|
if (typeof plainValue === "string") {
|
|
plainBuf = Utils.fromUtf8ToArray(plainValue).buffer;
|
|
} else {
|
|
plainBuf = plainValue;
|
|
}
|
|
|
|
const encObj = await this.aesEncrypt(plainBuf, key);
|
|
const iv = Utils.fromBufferToB64(encObj.iv);
|
|
const data = Utils.fromBufferToB64(encObj.data);
|
|
const mac = encObj.mac != null ? Utils.fromBufferToB64(encObj.mac) : null;
|
|
return new EncString(encObj.key.encType, data, iv, mac);
|
|
}
|
|
|
|
async encryptToBytes(plainValue: ArrayBuffer, key?: SymmetricCryptoKey): Promise<EncArrayBuffer> {
|
|
const encValue = await this.aesEncrypt(plainValue, key);
|
|
let macLen = 0;
|
|
if (encValue.mac != null) {
|
|
macLen = encValue.mac.byteLength;
|
|
}
|
|
|
|
const encBytes = new Uint8Array(1 + encValue.iv.byteLength + macLen + encValue.data.byteLength);
|
|
encBytes.set([encValue.key.encType]);
|
|
encBytes.set(new Uint8Array(encValue.iv), 1);
|
|
if (encValue.mac != null) {
|
|
encBytes.set(new Uint8Array(encValue.mac), 1 + encValue.iv.byteLength);
|
|
}
|
|
|
|
encBytes.set(new Uint8Array(encValue.data), 1 + encValue.iv.byteLength + macLen);
|
|
return new EncArrayBuffer(encBytes.buffer);
|
|
}
|
|
|
|
async rsaEncrypt(data: ArrayBuffer, publicKey?: ArrayBuffer): Promise<EncString> {
|
|
if (publicKey == null) {
|
|
publicKey = await this.getPublicKey();
|
|
}
|
|
if (publicKey == null) {
|
|
throw new Error("Public key unavailable.");
|
|
}
|
|
|
|
const encBytes = await this.cryptoFunctionService.rsaEncrypt(data, publicKey, "sha1");
|
|
return new EncString(EncryptionType.Rsa2048_OaepSha1_B64, Utils.fromBufferToB64(encBytes));
|
|
}
|
|
|
|
async rsaDecrypt(encValue: string, privateKeyValue?: ArrayBuffer): Promise<ArrayBuffer> {
|
|
const headerPieces = encValue.split(".");
|
|
let encType: EncryptionType = null;
|
|
let encPieces: string[];
|
|
|
|
if (headerPieces.length === 1) {
|
|
encType = EncryptionType.Rsa2048_OaepSha256_B64;
|
|
encPieces = [headerPieces[0]];
|
|
} else if (headerPieces.length === 2) {
|
|
try {
|
|
encType = parseInt(headerPieces[0], null);
|
|
encPieces = headerPieces[1].split("|");
|
|
} catch (e) {
|
|
this.logService.error(e);
|
|
}
|
|
}
|
|
|
|
switch (encType) {
|
|
case EncryptionType.Rsa2048_OaepSha256_B64:
|
|
case EncryptionType.Rsa2048_OaepSha1_B64:
|
|
case EncryptionType.Rsa2048_OaepSha256_HmacSha256_B64: // HmacSha256 types are deprecated
|
|
case EncryptionType.Rsa2048_OaepSha1_HmacSha256_B64:
|
|
break;
|
|
default:
|
|
throw new Error("encType unavailable.");
|
|
}
|
|
|
|
if (encPieces == null || encPieces.length <= 0) {
|
|
throw new Error("encPieces unavailable.");
|
|
}
|
|
|
|
const data = Utils.fromB64ToArray(encPieces[0]).buffer;
|
|
const privateKey = privateKeyValue ?? (await this.getPrivateKey());
|
|
if (privateKey == null) {
|
|
throw new Error("No private key.");
|
|
}
|
|
|
|
let alg: "sha1" | "sha256" = "sha1";
|
|
switch (encType) {
|
|
case EncryptionType.Rsa2048_OaepSha256_B64:
|
|
case EncryptionType.Rsa2048_OaepSha256_HmacSha256_B64:
|
|
alg = "sha256";
|
|
break;
|
|
case EncryptionType.Rsa2048_OaepSha1_B64:
|
|
case EncryptionType.Rsa2048_OaepSha1_HmacSha256_B64:
|
|
break;
|
|
default:
|
|
throw new Error("encType unavailable.");
|
|
}
|
|
|
|
return this.cryptoFunctionService.rsaDecrypt(data, privateKey, alg);
|
|
}
|
|
|
|
async decryptToBytes(encString: EncString, key?: SymmetricCryptoKey): Promise<ArrayBuffer> {
|
|
const iv = Utils.fromB64ToArray(encString.iv).buffer;
|
|
const data = Utils.fromB64ToArray(encString.data).buffer;
|
|
const mac = encString.mac ? Utils.fromB64ToArray(encString.mac).buffer : null;
|
|
const decipher = await this.aesDecryptToBytes(encString.encryptionType, data, iv, mac, key);
|
|
if (decipher == null) {
|
|
return null;
|
|
}
|
|
|
|
return decipher;
|
|
}
|
|
|
|
async decryptToUtf8(encString: EncString, key?: SymmetricCryptoKey): Promise<string> {
|
|
return await this.aesDecryptToUtf8(
|
|
encString.encryptionType,
|
|
encString.data,
|
|
encString.iv,
|
|
encString.mac,
|
|
key
|
|
);
|
|
}
|
|
|
|
async decryptFromBytes(encBuf: ArrayBuffer, key: SymmetricCryptoKey): Promise<ArrayBuffer> {
|
|
if (encBuf == null) {
|
|
throw new Error("no encBuf.");
|
|
}
|
|
|
|
const encBytes = new Uint8Array(encBuf);
|
|
const encType = encBytes[0];
|
|
let ctBytes: Uint8Array = null;
|
|
let ivBytes: Uint8Array = null;
|
|
let macBytes: Uint8Array = null;
|
|
|
|
switch (encType) {
|
|
case EncryptionType.AesCbc128_HmacSha256_B64:
|
|
case EncryptionType.AesCbc256_HmacSha256_B64:
|
|
if (encBytes.length <= 49) {
|
|
// 1 + 16 + 32 + ctLength
|
|
return null;
|
|
}
|
|
|
|
ivBytes = encBytes.slice(1, 17);
|
|
macBytes = encBytes.slice(17, 49);
|
|
ctBytes = encBytes.slice(49);
|
|
break;
|
|
case EncryptionType.AesCbc256_B64:
|
|
if (encBytes.length <= 17) {
|
|
// 1 + 16 + ctLength
|
|
return null;
|
|
}
|
|
|
|
ivBytes = encBytes.slice(1, 17);
|
|
ctBytes = encBytes.slice(17);
|
|
break;
|
|
default:
|
|
return null;
|
|
}
|
|
|
|
return await this.aesDecryptToBytes(
|
|
encType,
|
|
ctBytes.buffer,
|
|
ivBytes.buffer,
|
|
macBytes != null ? macBytes.buffer : null,
|
|
key
|
|
);
|
|
}
|
|
|
|
// EFForg/OpenWireless
|
|
// ref https://github.com/EFForg/OpenWireless/blob/master/app/js/diceware.js
|
|
async randomNumber(min: number, max: number): Promise<number> {
|
|
let rval = 0;
|
|
const range = max - min + 1;
|
|
const bitsNeeded = Math.ceil(Math.log2(range));
|
|
if (bitsNeeded > 53) {
|
|
throw new Error("We cannot generate numbers larger than 53 bits.");
|
|
}
|
|
|
|
const bytesNeeded = Math.ceil(bitsNeeded / 8);
|
|
const mask = Math.pow(2, bitsNeeded) - 1;
|
|
// 7776 -> (2^13 = 8192) -1 == 8191 or 0x00001111 11111111
|
|
|
|
// Fill a byte array with N random numbers
|
|
const byteArray = new Uint8Array(await this.cryptoFunctionService.randomBytes(bytesNeeded));
|
|
|
|
let p = (bytesNeeded - 1) * 8;
|
|
for (let i = 0; i < bytesNeeded; i++) {
|
|
rval += byteArray[i] * Math.pow(2, p);
|
|
p -= 8;
|
|
}
|
|
|
|
// Use & to apply the mask and reduce the number of recursive lookups
|
|
rval = rval & mask;
|
|
|
|
if (rval >= range) {
|
|
// Integer out of acceptable range
|
|
return this.randomNumber(min, max);
|
|
}
|
|
|
|
// Return an integer that falls within the range
|
|
return min + rval;
|
|
}
|
|
|
|
async validateKey(key: SymmetricCryptoKey) {
|
|
try {
|
|
const encPrivateKey = await this.stateService.getEncryptedPrivateKey();
|
|
const encKey = await this.getEncKeyHelper(key);
|
|
if (encPrivateKey == null || encKey == null) {
|
|
return false;
|
|
}
|
|
|
|
const privateKey = await this.decryptToBytes(new EncString(encPrivateKey), encKey);
|
|
await this.cryptoFunctionService.rsaExtractPublicKey(privateKey);
|
|
} catch (e) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// Helpers
|
|
protected async storeKey(key: SymmetricCryptoKey, userId?: string) {
|
|
if (await this.shouldStoreKey(KeySuffixOptions.Auto, userId)) {
|
|
await this.stateService.setCryptoMasterKeyAuto(key.keyB64, { userId: userId });
|
|
} else if (await this.shouldStoreKey(KeySuffixOptions.Biometric, userId)) {
|
|
await this.stateService.setCryptoMasterKeyBiometric(key.keyB64, { userId: userId });
|
|
} else {
|
|
await this.stateService.setCryptoMasterKeyAuto(null, { userId: userId });
|
|
await this.stateService.setCryptoMasterKeyBiometric(null, { userId: userId });
|
|
}
|
|
}
|
|
|
|
protected async shouldStoreKey(keySuffix: KeySuffixOptions, userId?: string) {
|
|
let shouldStoreKey = false;
|
|
if (keySuffix === KeySuffixOptions.Auto) {
|
|
const vaultTimeout = await this.stateService.getVaultTimeout({ userId: userId });
|
|
shouldStoreKey = vaultTimeout == null;
|
|
} else if (keySuffix === KeySuffixOptions.Biometric) {
|
|
const biometricUnlock = await this.stateService.getBiometricUnlock({ userId: userId });
|
|
shouldStoreKey = biometricUnlock && this.platformUtilService.supportsSecureStorage();
|
|
}
|
|
return shouldStoreKey;
|
|
}
|
|
|
|
protected async retrieveKeyFromStorage(keySuffix: KeySuffixOptions, userId?: string) {
|
|
return keySuffix === KeySuffixOptions.Auto
|
|
? await this.stateService.getCryptoMasterKeyAuto({ userId: userId })
|
|
: await this.stateService.getCryptoMasterKeyBiometric({ userId: userId });
|
|
}
|
|
|
|
private async aesEncrypt(data: ArrayBuffer, key: SymmetricCryptoKey): Promise<EncryptedObject> {
|
|
const obj = new EncryptedObject();
|
|
obj.key = await this.getKeyForEncryption(key);
|
|
obj.iv = await this.cryptoFunctionService.randomBytes(16);
|
|
obj.data = await this.cryptoFunctionService.aesEncrypt(data, obj.iv, obj.key.encKey);
|
|
|
|
if (obj.key.macKey != null) {
|
|
const macData = new Uint8Array(obj.iv.byteLength + obj.data.byteLength);
|
|
macData.set(new Uint8Array(obj.iv), 0);
|
|
macData.set(new Uint8Array(obj.data), obj.iv.byteLength);
|
|
obj.mac = await this.cryptoFunctionService.hmac(macData.buffer, obj.key.macKey, "sha256");
|
|
}
|
|
|
|
return obj;
|
|
}
|
|
|
|
private async aesDecryptToUtf8(
|
|
encType: EncryptionType,
|
|
data: string,
|
|
iv: string,
|
|
mac: string,
|
|
key: SymmetricCryptoKey
|
|
): Promise<string> {
|
|
const keyForEnc = await this.getKeyForEncryption(key);
|
|
const theKey = await this.resolveLegacyKey(encType, keyForEnc);
|
|
|
|
if (theKey.macKey != null && mac == null) {
|
|
this.logService.error("mac required.");
|
|
return null;
|
|
}
|
|
|
|
if (theKey.encType !== encType) {
|
|
this.logService.error("encType unavailable.");
|
|
return null;
|
|
}
|
|
|
|
const fastParams = this.cryptoFunctionService.aesDecryptFastParameters(data, iv, mac, theKey);
|
|
if (fastParams.macKey != null && fastParams.mac != null) {
|
|
const computedMac = await this.cryptoFunctionService.hmacFast(
|
|
fastParams.macData,
|
|
fastParams.macKey,
|
|
"sha256"
|
|
);
|
|
const macsEqual = await this.cryptoFunctionService.compareFast(fastParams.mac, computedMac);
|
|
if (!macsEqual) {
|
|
this.logService.error("mac failed.");
|
|
return null;
|
|
}
|
|
}
|
|
|
|
return this.cryptoFunctionService.aesDecryptFast(fastParams);
|
|
}
|
|
|
|
private async aesDecryptToBytes(
|
|
encType: EncryptionType,
|
|
data: ArrayBuffer,
|
|
iv: ArrayBuffer,
|
|
mac: ArrayBuffer,
|
|
key: SymmetricCryptoKey
|
|
): Promise<ArrayBuffer> {
|
|
const keyForEnc = await this.getKeyForEncryption(key);
|
|
const theKey = await this.resolveLegacyKey(encType, keyForEnc);
|
|
|
|
if (theKey.macKey != null && mac == null) {
|
|
return null;
|
|
}
|
|
|
|
if (theKey.encType !== encType) {
|
|
return null;
|
|
}
|
|
|
|
if (theKey.macKey != null && mac != null) {
|
|
const macData = new Uint8Array(iv.byteLength + data.byteLength);
|
|
macData.set(new Uint8Array(iv), 0);
|
|
macData.set(new Uint8Array(data), iv.byteLength);
|
|
const computedMac = await this.cryptoFunctionService.hmac(
|
|
macData.buffer,
|
|
theKey.macKey,
|
|
"sha256"
|
|
);
|
|
if (computedMac === null) {
|
|
return null;
|
|
}
|
|
|
|
const macsMatch = await this.cryptoFunctionService.compare(mac, computedMac);
|
|
if (!macsMatch) {
|
|
this.logService.error("mac failed.");
|
|
return null;
|
|
}
|
|
}
|
|
|
|
return await this.cryptoFunctionService.aesDecrypt(data, iv, theKey.encKey);
|
|
}
|
|
|
|
private async getKeyForEncryption(key?: SymmetricCryptoKey): Promise<SymmetricCryptoKey> {
|
|
if (key != null) {
|
|
return key;
|
|
}
|
|
|
|
const encKey = await this.getEncKey();
|
|
if (encKey != null) {
|
|
return encKey;
|
|
}
|
|
|
|
return await this.getKey();
|
|
}
|
|
|
|
private async resolveLegacyKey(
|
|
encType: EncryptionType,
|
|
key: SymmetricCryptoKey
|
|
): Promise<SymmetricCryptoKey> {
|
|
if (
|
|
encType === EncryptionType.AesCbc128_HmacSha256_B64 &&
|
|
key.encType === EncryptionType.AesCbc256_B64
|
|
) {
|
|
// Old encrypt-then-mac scheme, make a new key
|
|
let legacyKey = await this.stateService.getLegacyEtmKey();
|
|
if (legacyKey == null) {
|
|
legacyKey = new SymmetricCryptoKey(key.key, EncryptionType.AesCbc128_HmacSha256_B64);
|
|
await this.stateService.setLegacyEtmKey(legacyKey);
|
|
}
|
|
return legacyKey;
|
|
}
|
|
|
|
return key;
|
|
}
|
|
|
|
private async stretchKey(key: SymmetricCryptoKey): Promise<SymmetricCryptoKey> {
|
|
const newKey = new Uint8Array(64);
|
|
const encKey = await this.cryptoFunctionService.hkdfExpand(key.key, "enc", 32, "sha256");
|
|
const macKey = await this.cryptoFunctionService.hkdfExpand(key.key, "mac", 32, "sha256");
|
|
newKey.set(new Uint8Array(encKey));
|
|
newKey.set(new Uint8Array(macKey), 32);
|
|
return new SymmetricCryptoKey(newKey.buffer);
|
|
}
|
|
|
|
private async hashPhrase(hash: ArrayBuffer, minimumEntropy = 64) {
|
|
const entropyPerWord = Math.log(EEFLongWordList.length) / Math.log(2);
|
|
let numWords = Math.ceil(minimumEntropy / entropyPerWord);
|
|
|
|
const hashArr = Array.from(new Uint8Array(hash));
|
|
const entropyAvailable = hashArr.length * 4;
|
|
if (numWords * entropyPerWord > entropyAvailable) {
|
|
throw new Error("Output entropy of hash function is too small");
|
|
}
|
|
|
|
const phrase: string[] = [];
|
|
let hashNumber = bigInt.fromArray(hashArr, 256);
|
|
while (numWords--) {
|
|
const remainder = hashNumber.mod(EEFLongWordList.length);
|
|
hashNumber = hashNumber.divide(EEFLongWordList.length);
|
|
phrase.push(EEFLongWordList[remainder as any]);
|
|
}
|
|
return phrase;
|
|
}
|
|
|
|
private async buildEncKey(
|
|
key: SymmetricCryptoKey,
|
|
encKey: ArrayBuffer
|
|
): Promise<[SymmetricCryptoKey, EncString]> {
|
|
let encKeyEnc: EncString = null;
|
|
if (key.key.byteLength === 32) {
|
|
const newKey = await this.stretchKey(key);
|
|
encKeyEnc = await this.encrypt(encKey, newKey);
|
|
} else if (key.key.byteLength === 64) {
|
|
encKeyEnc = await this.encrypt(encKey, key);
|
|
} else {
|
|
throw new Error("Invalid key size.");
|
|
}
|
|
return [new SymmetricCryptoKey(encKey), encKeyEnc];
|
|
}
|
|
|
|
private async clearSecretKeyStore(userId?: string): Promise<void> {
|
|
await this.stateService.setCryptoMasterKeyAuto(null, { userId: userId });
|
|
await this.stateService.setCryptoMasterKeyBiometric(null, { userId: userId });
|
|
}
|
|
|
|
private async getEncKeyHelper(key: SymmetricCryptoKey = null): Promise<SymmetricCryptoKey> {
|
|
const inMemoryKey = await this.stateService.getDecryptedCryptoSymmetricKey();
|
|
if (inMemoryKey != null) {
|
|
return inMemoryKey;
|
|
}
|
|
|
|
const encKey = await this.stateService.getEncryptedCryptoSymmetricKey();
|
|
if (encKey == null) {
|
|
return null;
|
|
}
|
|
|
|
if (key == null) {
|
|
key = await this.getKey();
|
|
}
|
|
if (key == null) {
|
|
return null;
|
|
}
|
|
|
|
let decEncKey: ArrayBuffer;
|
|
const encKeyCipher = new EncString(encKey);
|
|
if (encKeyCipher.encryptionType === EncryptionType.AesCbc256_B64) {
|
|
decEncKey = await this.decryptToBytes(encKeyCipher, key);
|
|
} else if (encKeyCipher.encryptionType === EncryptionType.AesCbc256_HmacSha256_B64) {
|
|
const newKey = await this.stretchKey(key);
|
|
decEncKey = await this.decryptToBytes(encKeyCipher, newKey);
|
|
} else {
|
|
throw new Error("Unsupported encKey type.");
|
|
}
|
|
if (decEncKey == null) {
|
|
return null;
|
|
}
|
|
const symmetricCryptoKey = new SymmetricCryptoKey(decEncKey);
|
|
await this.stateService.setDecryptedCryptoSymmetricKey(symmetricCryptoKey);
|
|
return symmetricCryptoKey;
|
|
}
|
|
}
|