mirror of
https://github.com/bitwarden/browser.git
synced 2024-12-13 15:06:51 +01:00
79e6d012c5
* Create UserService for Api Keys * Limit scope request for organization keys * Expose necessary services for org key-based auth service * Linter fixes * Add public import models Since public import is tied tightly to the private api, constructors are provided to maintain coupling in case of changes * Do not parallelize file access This storage is sometims backed by lowdb files. Parallel writes can cause issues. * Match file name to class * Serialize storageService promises * Prefer multiple awaits to .then chains * Linter fixes
767 lines
27 KiB
TypeScript
767 lines
27 KiB
TypeScript
import * as bigInt from 'big-integer';
|
|
|
|
import { EncryptionType } from '../enums/encryptionType';
|
|
import { KdfType } from '../enums/kdfType';
|
|
|
|
import { EncArrayBuffer } from '../models/domain/encArrayBuffer';
|
|
import { EncryptedObject } from '../models/domain/encryptedObject';
|
|
import { EncString } from '../models/domain/encString';
|
|
import { SymmetricCryptoKey } from '../models/domain/symmetricCryptoKey';
|
|
import { ProfileOrganizationResponse } from '../models/response/profileOrganizationResponse';
|
|
|
|
import { CryptoService as CryptoServiceAbstraction } from '../abstractions/crypto.service';
|
|
import { CryptoFunctionService } from '../abstractions/cryptoFunction.service';
|
|
import { LogService } from '../abstractions/log.service';
|
|
import { PlatformUtilsService } from '../abstractions/platformUtils.service';
|
|
import { StorageService } from '../abstractions/storage.service';
|
|
|
|
import { ConstantsService } from './constants.service';
|
|
|
|
import { sequentialize } from '../misc/sequentialize';
|
|
import { Utils } from '../misc/utils';
|
|
import { EEFLongWordList } from '../misc/wordlist';
|
|
|
|
const Keys = {
|
|
key: 'key', // Master Key
|
|
encOrgKeys: 'encOrgKeys',
|
|
encPrivateKey: 'encPrivateKey',
|
|
encKey: 'encKey', // Generated Symmetric Key
|
|
keyHash: 'keyHash',
|
|
};
|
|
|
|
export class CryptoService implements CryptoServiceAbstraction {
|
|
private key: SymmetricCryptoKey;
|
|
private encKey: SymmetricCryptoKey;
|
|
private legacyEtmKey: SymmetricCryptoKey;
|
|
private keyHash: string;
|
|
private publicKey: ArrayBuffer;
|
|
private privateKey: ArrayBuffer;
|
|
private orgKeys: Map<string, SymmetricCryptoKey>;
|
|
|
|
constructor(private storageService: StorageService, private secureStorageService: StorageService,
|
|
private cryptoFunctionService: CryptoFunctionService, private platformUtilService: PlatformUtilsService,
|
|
private logService: LogService) {
|
|
}
|
|
|
|
async setKey(key: SymmetricCryptoKey): Promise<any> {
|
|
this.key = key;
|
|
|
|
if (!await this.shouldStoreKey()) {
|
|
return;
|
|
}
|
|
|
|
return this.secureStorageService.save(Keys.key, key.keyB64);
|
|
}
|
|
|
|
setKeyHash(keyHash: string): Promise<{}> {
|
|
this.keyHash = keyHash;
|
|
return this.storageService.save(Keys.keyHash, keyHash);
|
|
}
|
|
|
|
async setEncKey(encKey: string): Promise<{}> {
|
|
if (encKey == null) {
|
|
return;
|
|
}
|
|
|
|
await this.storageService.save(Keys.encKey, encKey);
|
|
this.encKey = null;
|
|
}
|
|
|
|
async setEncPrivateKey(encPrivateKey: string): Promise<{}> {
|
|
if (encPrivateKey == null) {
|
|
return;
|
|
}
|
|
|
|
await this.storageService.save(Keys.encPrivateKey, encPrivateKey);
|
|
this.privateKey = null;
|
|
}
|
|
|
|
setOrgKeys(orgs: ProfileOrganizationResponse[]): Promise<{}> {
|
|
const orgKeys: any = {};
|
|
orgs.forEach(org => {
|
|
orgKeys[org.id] = org.key;
|
|
});
|
|
|
|
this.orgKeys = null;
|
|
return this.storageService.save(Keys.encOrgKeys, orgKeys);
|
|
}
|
|
|
|
async getKey(): Promise<SymmetricCryptoKey> {
|
|
if (this.key != null) {
|
|
return this.key;
|
|
}
|
|
|
|
const key = await this.secureStorageService.get<string>(Keys.key);
|
|
if (key != null) {
|
|
if (!await this.shouldStoreKey()) {
|
|
this.logService.warning('Throwing away stored key since settings have changed');
|
|
this.secureStorageService.remove(Keys.key);
|
|
return null;
|
|
}
|
|
|
|
const symmetricKey = new SymmetricCryptoKey(Utils.fromB64ToArray(key).buffer);
|
|
|
|
if (!await this.validateKey(symmetricKey)) {
|
|
this.logService.warning('Wrong key, throwing away stored key');
|
|
this.secureStorageService.remove(Keys.key);
|
|
return null;
|
|
}
|
|
|
|
this.key = symmetricKey;
|
|
}
|
|
|
|
return key == null ? null : this.key;
|
|
}
|
|
|
|
async getKeyHash(): Promise<string> {
|
|
if (this.keyHash != null) {
|
|
return this.keyHash;
|
|
}
|
|
|
|
const keyHash = await this.storageService.get<string>(Keys.keyHash);
|
|
if (keyHash != null) {
|
|
this.keyHash = keyHash;
|
|
}
|
|
|
|
return keyHash == null ? null : this.keyHash;
|
|
}
|
|
|
|
@sequentialize(() => 'getEncKey')
|
|
async getEncKey(key: SymmetricCryptoKey = null): Promise<SymmetricCryptoKey> {
|
|
if (this.encKey != null) {
|
|
return this.encKey;
|
|
}
|
|
|
|
const encKey = await this.storageService.get<string>(Keys.encKey);
|
|
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;
|
|
}
|
|
this.encKey = new SymmetricCryptoKey(decEncKey);
|
|
return this.encKey;
|
|
}
|
|
|
|
async getPublicKey(): Promise<ArrayBuffer> {
|
|
if (this.publicKey != null) {
|
|
return this.publicKey;
|
|
}
|
|
|
|
const privateKey = await this.getPrivateKey();
|
|
if (privateKey == null) {
|
|
return null;
|
|
}
|
|
|
|
this.publicKey = await this.cryptoFunctionService.rsaExtractPublicKey(privateKey);
|
|
return this.publicKey;
|
|
}
|
|
|
|
async getPrivateKey(): Promise<ArrayBuffer> {
|
|
if (this.privateKey != null) {
|
|
return this.privateKey;
|
|
}
|
|
|
|
const encPrivateKey = await this.storageService.get<string>(Keys.encPrivateKey);
|
|
if (encPrivateKey == null) {
|
|
return null;
|
|
}
|
|
|
|
this.privateKey = await this.decryptToBytes(new EncString(encPrivateKey), null);
|
|
return this.privateKey;
|
|
}
|
|
|
|
async getFingerprint(userId: string, publicKey?: ArrayBuffer): Promise<string[]> {
|
|
if (publicKey == null) {
|
|
publicKey = await this.getPublicKey();
|
|
}
|
|
if (publicKey === null) {
|
|
throw new Error('No public key available.');
|
|
}
|
|
const keyFingerprint = await this.cryptoFunctionService.hash(publicKey, 'sha256');
|
|
const userFingerprint = await this.cryptoFunctionService.hkdfExpand(keyFingerprint, userId, 32, 'sha256');
|
|
return this.hashPhrase(userFingerprint);
|
|
}
|
|
|
|
@sequentialize(() => 'getOrgKeys')
|
|
async getOrgKeys(): Promise<Map<string, SymmetricCryptoKey>> {
|
|
if (this.orgKeys != null && this.orgKeys.size > 0) {
|
|
return this.orgKeys;
|
|
}
|
|
|
|
const encOrgKeys = await this.storageService.get<any>(Keys.encOrgKeys);
|
|
if (encOrgKeys == null) {
|
|
return null;
|
|
}
|
|
|
|
const orgKeys: Map<string, SymmetricCryptoKey> = new Map<string, SymmetricCryptoKey>();
|
|
let setKey = false;
|
|
|
|
for (const orgId in encOrgKeys) {
|
|
if (!encOrgKeys.hasOwnProperty(orgId)) {
|
|
continue;
|
|
}
|
|
|
|
const decValue = await this.rsaDecrypt(encOrgKeys[orgId]);
|
|
orgKeys.set(orgId, new SymmetricCryptoKey(decValue));
|
|
setKey = true;
|
|
}
|
|
|
|
if (setKey) {
|
|
this.orgKeys = orgKeys;
|
|
}
|
|
|
|
return this.orgKeys;
|
|
}
|
|
|
|
async getOrgKey(orgId: string): Promise<SymmetricCryptoKey> {
|
|
if (orgId == null) {
|
|
return null;
|
|
}
|
|
|
|
const orgKeys = await this.getOrgKeys();
|
|
if (orgKeys == null || !orgKeys.has(orgId)) {
|
|
return null;
|
|
}
|
|
|
|
return orgKeys.get(orgId);
|
|
}
|
|
|
|
async hasKey(): Promise<boolean> {
|
|
return (await this.getKey()) != null;
|
|
}
|
|
|
|
async hasEncKey(): Promise<boolean> {
|
|
const encKey = await this.storageService.get<string>(Keys.encKey);
|
|
return encKey != null;
|
|
}
|
|
|
|
clearKey(): Promise<any> {
|
|
this.key = this.legacyEtmKey = null;
|
|
return this.secureStorageService.remove(Keys.key);
|
|
}
|
|
|
|
clearKeyHash(): Promise<any> {
|
|
this.keyHash = null;
|
|
return this.storageService.remove(Keys.keyHash);
|
|
}
|
|
|
|
clearEncKey(memoryOnly?: boolean): Promise<any> {
|
|
this.encKey = null;
|
|
if (memoryOnly) {
|
|
return Promise.resolve();
|
|
}
|
|
return this.storageService.remove(Keys.encKey);
|
|
}
|
|
|
|
clearKeyPair(memoryOnly?: boolean): Promise<any> {
|
|
this.privateKey = null;
|
|
this.publicKey = null;
|
|
if (memoryOnly) {
|
|
return Promise.resolve();
|
|
}
|
|
return this.storageService.remove(Keys.encPrivateKey);
|
|
}
|
|
|
|
clearOrgKeys(memoryOnly?: boolean): Promise<any> {
|
|
this.orgKeys = null;
|
|
if (memoryOnly) {
|
|
return Promise.resolve();
|
|
}
|
|
return this.storageService.remove(Keys.encOrgKeys);
|
|
}
|
|
|
|
clearPinProtectedKey(): Promise<any> {
|
|
return this.storageService.remove(ConstantsService.pinProtectedKey);
|
|
}
|
|
|
|
async clearKeys(): Promise<any> {
|
|
await this.clearEncKey();
|
|
await this.clearKeyHash();
|
|
await this.clearOrgKeys();
|
|
await this.clearEncKey();
|
|
await this.clearKeyPair();
|
|
await this.clearPinProtectedKey();
|
|
}
|
|
|
|
async toggleKey(): Promise<any> {
|
|
const key = await this.getKey();
|
|
const option = await this.storageService.get(ConstantsService.vaultTimeoutKey);
|
|
const biometric = await this.storageService.get(ConstantsService.biometricUnlockKey);
|
|
if ((!biometric && this.platformUtilService.supportsSecureStorage()) && (option != null || option === 0)) {
|
|
// if we have a lock option set, clear the key
|
|
await this.clearKey();
|
|
this.key = key;
|
|
return;
|
|
}
|
|
|
|
await this.setKey(key);
|
|
}
|
|
|
|
async makeKey(password: string, salt: string, kdf: KdfType, kdfIterations: number):
|
|
Promise<SymmetricCryptoKey> {
|
|
let key: ArrayBuffer = null;
|
|
if (kdf == null || kdf === KdfType.PBKDF2_SHA256) {
|
|
if (kdfIterations == null) {
|
|
kdfIterations = 5000;
|
|
} else if (kdfIterations < 5000) {
|
|
throw new Error('PBKDF2 iteration minimum is 5000.');
|
|
}
|
|
key = await this.cryptoFunctionService.pbkdf2(password, salt, 'sha256', kdfIterations);
|
|
} else {
|
|
throw new Error('Unknown Kdf.');
|
|
}
|
|
return new SymmetricCryptoKey(key);
|
|
}
|
|
|
|
async makeKeyFromPin(pin: string, salt: string, kdf: KdfType, kdfIterations: number,
|
|
protectedKeyCs: EncString = null):
|
|
Promise<SymmetricCryptoKey> {
|
|
if (protectedKeyCs == null) {
|
|
const pinProtectedKey = await this.storageService.get<string>(ConstantsService.pinProtectedKey);
|
|
if (pinProtectedKey == null) {
|
|
throw new Error('No PIN protected key found.');
|
|
}
|
|
protectedKeyCs = new EncString(pinProtectedKey);
|
|
}
|
|
const pinKey = await this.makePinKey(pin, salt, kdf, kdfIterations);
|
|
const decKey = await this.decryptToBytes(protectedKeyCs, pinKey);
|
|
return new SymmetricCryptoKey(decKey);
|
|
}
|
|
|
|
async makeShareKey(): Promise<[EncString, SymmetricCryptoKey]> {
|
|
const shareKey = await this.cryptoFunctionService.randomBytes(64);
|
|
const publicKey = await this.getPublicKey();
|
|
const encShareKey = await this.rsaEncrypt(shareKey, publicKey);
|
|
return [encShareKey, new SymmetricCryptoKey(shareKey)];
|
|
}
|
|
|
|
async makeKeyPair(key?: SymmetricCryptoKey): Promise<[string, EncString]> {
|
|
const keyPair = await this.cryptoFunctionService.rsaGenerateKeyPair(2048);
|
|
const publicB64 = Utils.fromBufferToB64(keyPair[0]);
|
|
const privateEnc = await this.encrypt(keyPair[1], key);
|
|
return [publicB64, privateEnc];
|
|
}
|
|
|
|
async makePinKey(pin: string, salt: string, kdf: KdfType, kdfIterations: number): Promise<SymmetricCryptoKey> {
|
|
const pinKey = await this.makeKey(pin, salt, kdf, kdfIterations);
|
|
return await this.stretchKey(pinKey);
|
|
}
|
|
|
|
async makeSendKey(keyMaterial: ArrayBuffer): Promise<SymmetricCryptoKey> {
|
|
const sendKey = await this.cryptoFunctionService.hkdf(keyMaterial, 'bitwarden-send', 'send', 64, 'sha256');
|
|
return new SymmetricCryptoKey(sendKey);
|
|
}
|
|
|
|
async hashPassword(password: string, key: SymmetricCryptoKey): Promise<string> {
|
|
if (key == null) {
|
|
key = await this.getKey();
|
|
}
|
|
if (password == null || key == null) {
|
|
throw new Error('Invalid parameters.');
|
|
}
|
|
|
|
const hash = await this.cryptoFunctionService.pbkdf2(key.key, password, 'sha256', 1);
|
|
return Utils.fromBufferToB64(hash);
|
|
}
|
|
|
|
async makeEncKey(key: SymmetricCryptoKey): Promise<[SymmetricCryptoKey, EncString]> {
|
|
const theKey = await this.getKeyForEncryption(key);
|
|
const encKey = await this.cryptoFunctionService.randomBytes(64);
|
|
return this.buildEncKey(theKey, encKey);
|
|
}
|
|
|
|
async remakeEncKey(key: SymmetricCryptoKey, encKey?: SymmetricCryptoKey): Promise<[SymmetricCryptoKey, EncString]> {
|
|
if (encKey == null) {
|
|
encKey = await this.getEncKey();
|
|
}
|
|
return this.buildEncKey(key, encKey.key);
|
|
}
|
|
|
|
async encrypt(plainValue: string | ArrayBuffer, key?: SymmetricCryptoKey): Promise<EncString> {
|
|
if (plainValue == null) {
|
|
return Promise.resolve(null);
|
|
}
|
|
|
|
let plainBuf: ArrayBuffer;
|
|
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): 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) { }
|
|
}
|
|
|
|
switch (encType) {
|
|
case EncryptionType.Rsa2048_OaepSha256_B64:
|
|
case EncryptionType.Rsa2048_OaepSha1_B64:
|
|
// HmacSha256 types are deprecated
|
|
case EncryptionType.Rsa2048_OaepSha256_HmacSha256_B64:
|
|
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 = 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
|
|
// tslint:disable-next-line
|
|
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.storageService.get<string>(Keys.encPrivateKey);
|
|
if (encPrivateKey == null) {
|
|
return false;
|
|
}
|
|
|
|
const encKey = await this.getEncKey(key);
|
|
const privateKey = await this.decryptToBytes(new EncString(encPrivateKey), encKey);
|
|
await this.cryptoFunctionService.rsaExtractPublicKey(privateKey);
|
|
} catch (e) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// Helpers
|
|
|
|
private async shouldStoreKey() {
|
|
const vaultTimeout = await this.storageService.get<number>(ConstantsService.vaultTimeoutKey);
|
|
const biometricUnlock = await this.storageService.get<boolean>(ConstantsService.biometricUnlockKey);
|
|
|
|
const biometricsEnabled = biometricUnlock && this.platformUtilService.supportsSecureStorage();
|
|
const noVaultTimeout = vaultTimeout == null;
|
|
|
|
return noVaultTimeout || biometricsEnabled;
|
|
}
|
|
|
|
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 = 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 = 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 resolveLegacyKey(encType: EncryptionType, key: SymmetricCryptoKey): SymmetricCryptoKey {
|
|
if (encType === EncryptionType.AesCbc128_HmacSha256_B64 &&
|
|
key.encType === EncryptionType.AesCbc256_B64) {
|
|
// Old encrypt-then-mac scheme, make a new key
|
|
if (this.legacyEtmKey == null) {
|
|
this.legacyEtmKey = new SymmetricCryptoKey(key.key, EncryptionType.AesCbc128_HmacSha256_B64);
|
|
}
|
|
return this.legacyEtmKey;
|
|
}
|
|
|
|
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: number = 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];
|
|
}
|
|
}
|