> Given a solid client library for JS, I think implicit flow is OK to use.
If you can, can you dig deeper here? What is it about this particular library that makes its use of the OAuth 2 implicit flow secure? Signed messages? Only supports registered clients? Something else? Aloha, Jim On 2/17/17 8:02 AM, Dominick Baier wrote: > Given a solid client library for JS, I think implicit flow is OK to use. > > But I agree that there are many “home grown” implementation out there > that are not secure - and the necessary JS code to write a good client > is not necessarily the “pit of success”. > > You should give this lib a go (it’s also a certified RP): > > https://github.com/IdentityModel/oidc-client-js > > Many people argue that handling the protocol and crypto pieces in JS > is problematic (and I agree if no proper lib is used for that) - but > at then end of the day the access token will end up in the browser - > and a sloppy developer (e.g. not using CSP) will always write bad code > that might lead to leaking a token. > > ------- > Dominick Baier > > On 17 February 2017 at 18:43:25, Adam Lewis > (adam.le...@motorolasolutions.com > <mailto:adam.le...@motorolasolutions.com>) wrote: > >> +1000 >> >> We are currently going through internal turmoil over the usage of >> implicit grant for ua-based apps. The webapp case is well understood >> and the WG has work in progress to define best practices for native >> apps. Having one for ua-based apps would be HUGELY beneficial >> >> >> >> On Fri, Feb 17, 2017 at 11:40 AM, Jim Manico <j...@manicode.com >> <mailto:j...@manicode.com>> wrote: >> >> Thank you to those answering my question on implicit for JS clients. >> >> The responses so far seem to represent what the security world is >> saying about the implicit grant - keep away from it other than >> for a few OIDC use cases. >> >> Does anyone think it would be valuable to author a brief RFC to >> give clear OAuth 2 recommendations for JavaScript client developers? >> >> I mean - the OAuth 2 body of work just needs a few more RFC's, >> right? :) >> >> Aloha, Jim >> >> >> >> On 2/17/17 6:03 AM, sebastian.ebl...@telekom.de >> <mailto:sebastian.ebl...@telekom.de> wrote: >>> >>> Same for Deutsche Telekom. Our javascript clients also use code >>> flow with CORS processing and of course redirect_uri validation. >>> >>> >>> >>> Best regards >>> >>> >>> >>> Sebastian >>> >>> >>> >>> *Von:* OAuth [mailto:oauth-boun...@ietf.org] *Im Auftrag von* >>> Bill Burke >>> *Gesendet:* Freitag, 17. Februar 2017 00:14 >>> *An:* oauth@ietf.org <mailto:oauth@ietf.org> >>> *Betreff:* Re: [OAUTH-WG] Google's use of Implicit Grant Flow >>> >>> >>> >>> For our IDP [1], our javascript library uses the auth code flow, >>> but requires a public client, redirect_uri validation, and also >>> does CORS checks and processing. We did not like Implicit Flow >>> because >>> >>> 1) access tokens would be in the browser history >>> >>> 2) short lived access tokens (seconds or minutes) would require >>> a browser redirect >>> >>> I'd be really curious to hear other's thoughts though. >>> >>> [1] http://keycloak.org >>> >>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__keycloak.org&d=DwMD-g&c=q3cDpHe1hF8lXU5EFjNM_A&r=hS3A5qzQnW1hxYBhPrxNW10ESeDiiiRwR8H84JHIXTI&m=IfM1P0zp986kOQNk7-NwlgfRZMq5MppK0kISXhIOF_s&s=YExyuyZO5YNpSvS3mEUG5pjKAjRXXVT8Xvk8hIb-Efw&e=> >>> >>> >>> >>> >>> >>> >>> >>> On 2/16/17 5:44 PM, Jim Manico wrote: >>> >>> Hello Folks, >>> >>> I noticed that Google supports the OAuth 2 Implicit flow for >>> third-party JavaScript applications. >>> >>> https://developers.google.com/identity/protocols/OAuth2UserAgent >>> >>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__developers.google.com_identity_protocols_OAuth2UserAgent&d=DwMD-g&c=q3cDpHe1hF8lXU5EFjNM_A&r=hS3A5qzQnW1hxYBhPrxNW10ESeDiiiRwR8H84JHIXTI&m=IfM1P0zp986kOQNk7-NwlgfRZMq5MppK0kISXhIOF_s&s=_Mig-zmCt1y9dZpCece1dqby3VmcZVOu2JPcmAwzwKU&e=> >>> >>> Isn't this generally discouraged from a security POV? *Is >>> there a better OAuth 2 flow for third party SPA applications?* >>> >>> Aloha, >>> >>> -- >>> >>> Jim Manico >>> >>> Manicode Security >>> >>> https://www.manicode.com >>> >>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.manicode.com&d=DwMD-g&c=q3cDpHe1hF8lXU5EFjNM_A&r=hS3A5qzQnW1hxYBhPrxNW10ESeDiiiRwR8H84JHIXTI&m=IfM1P0zp986kOQNk7-NwlgfRZMq5MppK0kISXhIOF_s&s=H8pXLA4TE27vW-gz5Sbr9VOUP-KZMmd-gQ-okH4ohMU&e=> >>> >>> >>> >>> >>> _______________________________________________ >>> >>> OAuth mailing list >>> >>> OAuth@ietf.org <mailto:OAuth@ietf.org> >>> >>> https://www.ietf.org/mailman/listinfo/oauth >>> >>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_mailman_listinfo_oauth&d=DwMD-g&c=q3cDpHe1hF8lXU5EFjNM_A&r=hS3A5qzQnW1hxYBhPrxNW10ESeDiiiRwR8H84JHIXTI&m=IfM1P0zp986kOQNk7-NwlgfRZMq5MppK0kISXhIOF_s&s=jAjifWdP3vqnDgWricLE62R9_d0BQReWRUitqM5S1JU&e=> >>> >>> >>> >>> _______________________________________________ >>> OAuth mailing list >>> OAuth@ietf.org <mailto:OAuth@ietf.org> >>> https://www.ietf.org/mailman/listinfo/oauth >>> >>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_mailman_listinfo_oauth&d=DwMD-g&c=q3cDpHe1hF8lXU5EFjNM_A&r=hS3A5qzQnW1hxYBhPrxNW10ESeDiiiRwR8H84JHIXTI&m=IfM1P0zp986kOQNk7-NwlgfRZMq5MppK0kISXhIOF_s&s=jAjifWdP3vqnDgWricLE62R9_d0BQReWRUitqM5S1JU&e=> >> -- >> Jim Manico >> Manicode Security >> https://www.manicode.com >> >> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.manicode.com&d=DwMD-g&c=q3cDpHe1hF8lXU5EFjNM_A&r=hS3A5qzQnW1hxYBhPrxNW10ESeDiiiRwR8H84JHIXTI&m=IfM1P0zp986kOQNk7-NwlgfRZMq5MppK0kISXhIOF_s&s=H8pXLA4TE27vW-gz5Sbr9VOUP-KZMmd-gQ-okH4ohMU&e=> >> >> _______________________________________________ OAuth mailing >> list OAuth@ietf.org <mailto:OAuth@ietf.org> >> https://www.ietf.org/mailman/listinfo/oauth >> <https://www.ietf.org/mailman/listinfo/oauth> >> >> _______________________________________________ OAuth mailing list >> OAuth@ietf.org <mailto:OAuth@ietf.org> >> https://www.ietf.org/mailman/listinfo/oauth -- Jim Manico Manicode Security https://www.manicode.com
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