Use Cases and Requirements for Web Packages
draft-yasskin-wpack-use-cases-00

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Network Working Group                                         J. Yasskin
Internet-Draft                                                    Google
Intended status: Informational                          October 30, 2019
Expires: May 2, 2020

              Use Cases and Requirements for Web Packages
                    draft-yasskin-wpack-use-cases-00

Abstract

   This document lists use cases for signing and/or bundling collections
   of web pages, and extracts a set of requirements from them.

Note to Readers

   Discussion of this draft takes place on the ART area mailing list
   (art@ietf.org), which is archived at
   https://mailarchive.ietf.org/arch/search/?email_list=art [1].

   The source code and issues list for this draft can be found in
   https://github.com/WICG/webpackage [2].

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

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   This Internet-Draft will expire on May 2, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of

Yasskin                    Expires May 2, 2020                  [Page 1]
Internet-Draft Use Cases and Requirements for Web Packages  October 2019

   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Use cases . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Essential . . . . . . . . . . . . . . . . . . . . . . . .   4
       2.1.1.  Offline installation  . . . . . . . . . . . . . . . .   4
       2.1.2.  Offline browsing  . . . . . . . . . . . . . . . . . .   5
       2.1.3.  Save and share a web page . . . . . . . . . . . . . .   6
       2.1.4.  Privacy-preserving prefetch . . . . . . . . . . . . .   6
     2.2.  Nice-to-have  . . . . . . . . . . . . . . . . . . . . . .   7
       2.2.1.  Packaged Web Publications . . . . . . . . . . . . . .   7
       2.2.2.  Avoiding Censorship . . . . . . . . . . . . . . . . .   8
       2.2.3.  Third-party security review . . . . . . . . . . . . .   9
       2.2.4.  Building packages from multiple libraries . . . . . .   9
       2.2.5.  Cross-CDN Serving . . . . . . . . . . . . . . . . . .  10
       2.2.6.  Pre-installed applications  . . . . . . . . . . . . .  11
       2.2.7.  Protecting Users from a Compromised Frontend  . . . .  11
       2.2.8.  Installation from a self-extracting executable  . . .  12
       2.2.9.  Packages in version control . . . . . . . . . . . . .  13
       2.2.10. Subresource bundling  . . . . . . . . . . . . . . . .  13
       2.2.11. Archival  . . . . . . . . . . . . . . . . . . . . . .  14
   3.  Requirements  . . . . . . . . . . . . . . . . . . . . . . . .  14
     3.1.  Essential . . . . . . . . . . . . . . . . . . . . . . . .  14
       3.1.1.  Indexed by URL  . . . . . . . . . . . . . . . . . . .  14
       3.1.2.  Request headers . . . . . . . . . . . . . . . . . . .  15
       3.1.3.  Response headers  . . . . . . . . . . . . . . . . . .  15
       3.1.4.  Signing as an origin  . . . . . . . . . . . . . . . .  15
       3.1.5.  Random access . . . . . . . . . . . . . . . . . . . .  15
       3.1.6.  Resources from multiple origins in a package  . . . .  16
       3.1.7.  Cryptographic agility . . . . . . . . . . . . . . . .  16
       3.1.8.  Unsigned content  . . . . . . . . . . . . . . . . . .  16
       3.1.9.  Certificate revocation  . . . . . . . . . . . . . . .  16
       3.1.10. Downgrade prevention  . . . . . . . . . . . . . . . .  16
       3.1.11. Metadata  . . . . . . . . . . . . . . . . . . . . . .  16
       3.1.12. Implementations are hard to get wrong . . . . . . . .  16
     3.2.  Nice to have  . . . . . . . . . . . . . . . . . . . . . .  17
       3.2.1.  Streamed loading  . . . . . . . . . . . . . . . . . .  17
       3.2.2.  Signing without origin trust  . . . . . . . . . . . .  17