support for unlocking with PIN code

src/services/constants.service.ts

@@ -18,6 +18,7 @@ export class ConstantsService {
     static readonly dontShowCardsCurrentTab: string = 'dontShowCardsCurrentTab';
     static readonly dontShowIdentitiesCurrentTab: string = 'dontShowIdentitiesCurrentTab';
     static readonly defaultUriMatch: string = 'defaultUriMatch';
+    static readonly pinProtectedKey: string = 'pinProtectedKey';
 
     readonly environmentUrlsKey: string = ConstantsService.environmentUrlsKey;
     readonly disableGaKey: string = ConstantsService.disableGaKey;
@@ -37,4 +38,5 @@ export class ConstantsService {
     readonly dontShowCardsCurrentTab: string = ConstantsService.dontShowCardsCurrentTab;
     readonly dontShowIdentitiesCurrentTab: string = ConstantsService.dontShowIdentitiesCurrentTab;
     readonly defaultUriMatch: string = ConstantsService.defaultUriMatch;
+    readonly pinProtectedKey: string = ConstantsService.pinProtectedKey;
 }

src/services/crypto.service.ts

@@ -266,6 +266,10 @@ export class CryptoService implements CryptoServiceAbstraction {
         return this.storageService.remove(Keys.encOrgKeys);
     }
 
+    clearPinProtectedKey(): Promise<any> {
+        return this.storageService.remove(ConstantsService.pinProtectedKey);
+    }
+
     clearKeys(): Promise<any> {
         return Promise.all([
             this.clearKey(),
@@ -273,6 +277,7 @@ export class CryptoService implements CryptoServiceAbstraction {
             this.clearOrgKeys(),
             this.clearEncKey(),
             this.clearKeyPair(),
+            this.clearPinProtectedKey(),
         ]);
     }
 
@@ -319,6 +324,11 @@ export class CryptoService implements CryptoServiceAbstraction {
         return [publicB64, privateEnc];
     }
 
+    async makePinKey(pin: string, salt: string): Promise<SymmetricCryptoKey> {
+        const pinKey = await this.makeKey(pin, salt, KdfType.PBKDF2_SHA256, 100000);
+        return await this.stretchKey(pinKey);
+    }
+
     async hashPassword(password: string, key: SymmetricCryptoKey): Promise<string> {
         if (key == null) {
             key = await this.getKey();

src/services/lock.service.ts

@@ -87,4 +87,9 @@ export class LockService implements LockServiceAbstraction {
         await this.storageService.save(ConstantsService.lockOptionKey, lockOption);
         await this.cryptoService.toggleKey();
     }
+
+    async isPinLockSet(): Promise<boolean> {
+        const pinProtectedKey = await this.storageService.get<string>(ConstantsService.pinProtectedKey);
+        return pinProtectedKey != null;
+    }
 }