[whatwg] DOMCrypt update: July 14 Meeting Report

David Dahl ddahl at mozilla.com
Tue Jul 26 12:59:20 PDT 2011

Hello All:

Just a quick report on a DOMCrypt meeting that took place Thursday, 2011-07-14 at Mozilla in Mountain View.


    DOMCrypt is a high-level API that should be usable by web developers after a short period of study
    DOMCrypt will be designed and implemented so that it is difficult to "do the wrong thing"
    HASH and HMAC methods may be implemented first
    The Public Key API is the most useful, so it should be implemented before the symmetric encryption API
        Keypairs must be generated on a per-origin basis
        The Keypair for a specific origin cannot be used in another origin 
    No private or wrapped key material will be accessible to content scripts
    Each implementation will provide a mechanism to clear keys
    A "Key ID" will be used to tell the decrypt method which (content inaccessible) private key to use to decrypt data
    The returned encrypted object format will be a raw ArrayBuffer
    The public key format will be a raw ArrayBuffer
        **We agreed to "have all the inputs and outputs be raw, unformatted ArrayBuffers, letting higher-level pure JS wrappers deal with conversion to application data formats until we understand better what higher-level formats would be useful"
    HASH and HMAC methods should be synchronous to make them simpler
        HASH and HMAC methods should be constructors 
    We may implement the HASH and HMAC APIs first then the PublicKey API

A wiki page with more detail is here: https://wiki.mozilla.org/Privacy/Features/DOMCryptAPISpec/Meeting-2011-07-14

The DOMCrypt Spec is here: https://wiki.mozilla.org/Privacy/Features/DOMCryptAPISpec/Latest 

Any comments and discussion will be most welcome.


David Dahl

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