fix(encrypt): fix 'shareWithUsers' argument alteration

Author: JMounier

packages/core/src/DataProtection/DataProtector.ts

@@ -218,8 +218,12 @@ export class DataProtector {
   }
 
   async _getTransparentSession(encryptionOptions: Omit<EncryptionOptions, 'paddingStep'>): Promise<SessionResult> {
-    const shareWithUsers = encryptionOptions.shareWithUsers || [];
-    const shareWithGroups = encryptionOptions.shareWithGroups || [];
+    const shareWithUsers = [
+      ...encryptionOptions.shareWithUsers || [],
+    ];
+    const shareWithGroups = [
+      ...encryptionOptions.shareWithGroups || [],
+    ];
 
     if (encryptionOptions.shareWithSelf) {
       const selfIdentity = _serializeIdentity(this._handleShareWithSelf([], encryptionOptions.shareWithSelf)[0]!);

packages/functional-tests/src/encryption.ts

@@ -197,6 +197,15 @@ export const generateEncryptionTests = (args: TestArgs) => {
     });
 
     describe('share at encryption time', () => {
+      it('does not alter sharing options', async () => {
+        const options = {
+          shareWithUsers: [alicePublicIdentity],
+        };
+        await expect(bobLaptop.encrypt(clearText, options)).to.be.fulfilled;
+
+        expect(options.shareWithUsers.length).to.equal(1);
+      });
+
       it('encrypts and shares with a permanent identity', async () => {
         const encrypted = await bobLaptop.encrypt(clearText, { shareWithUsers: [alicePublicIdentity] });
         await expectDecrypt([aliceLaptop], clearText, encrypted);