Bug 218479 – [WebAuthn] [iOS] WebAuthn process doesn't start on iOS devices

• Component: WebKit Misc.
• Status: RESOLVED FIXED

[Jiewen Tan]

WebAuthn process doesn't start on iOS devices.

[Jiewen Tan]

<rdar://problem/70560399>

[Jiewen Tan]

Created attachment 413004 [details]
Patch

[Brent Fulgham]

Comment on attachment 413004 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=413004&action=review

This initial sandbox is far too lax. You should pare it down before we land this.

I also expect to see macOS sandboxing for this process, is that happening in a separate bug?

> Source/WebKit/ChangeLog:12
> +        Copied from the GPU process. Will strip it down once the process is fully functional.

You will need a sandbox on macOS, too.

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:199
> +)

I'll bet we do not need media-remote at all.

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:219
> +)

I doubt we need media-capture at all.

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:230
> +)

We might need this if we are showing UI through this XPC service, but I suspect that authd actually does that, so we probably don't need this.

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:240
> +)

I doubt we need media-accessibility-support.

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:290
> +)

I don't we need the OpenGL support.

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:383
> +)

I doubt we need speech-synthesis-and-voiceover.

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:434
> +)

We probably do not need dictionary-support.

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:579
> +    (global-name "com.apple.tccd"))

I don't think we need this, but since it's generating telemetry you can keep it so we can double-check.

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:665
> +(play-media)

I doubt we need these.

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:668
> +(media-remote)

Delete this please.

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:674
> +    (global-name "com.apple.TextInput"))

I doubt we need this.

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:678
> +(speech-synthesis-and-voiceover)

Delete this please.

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:681
> +    (global-name "com.apple.audio.AudioComponentRegistrar"))

Delete this please.

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:688
> +    "/systemgroup.com.apple.nsurlstoragedresources/Library/dafsaData.bin")

Seems very unlikely we need this.

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:707
> +)

It seems very unlikely we need these.

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:724
> +    (global-name "com.apple.iconservices"))

It seems unlikely we need this stuff.

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:738
> +(dictionary-support)

Delete this, please.

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:748
> +(framebuffer-access)

Seems unlikely

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:751
> +(opengl)

Seems very unlikely

[Brent Fulgham]

Comment on attachment 413004 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=413004&action=review

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:544
> +           (extension "com.apple.security.exception.shared-preference.read-write"))

Please also remove this rule (see Bug 218594). We don't issue this extension to WebKit, ever.

[Brent Fulgham]

Comment on attachment 413004 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=413004&action=review

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:538
> +           (extension "com.apple.security.exception.iokit-user-client-class"))

Please also remove this rule (See Bug 218596). We don't issue this extension to WebKit, ever.

[Jiewen Tan]

Comment on attachment 413004 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=413004&action=review

Thanks Brent for reviewing this patch.

>> Source/WebKit/ChangeLog:12
>> +        Copied from the GPU process. Will strip it down once the process is fully functional.
> 
> You will need a sandbox on macOS, too.

The macOS process already has one.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:199
>> +)
> 
> I'll bet we do not need media-remote at all.

Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:219
>> +)
> 
> I doubt we need media-capture at all.

Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:230
>> +)
> 
> We might need this if we are showing UI through this XPC service, but I suspect that authd actually does that, so we probably don't need this.

Springboard will probably do that for us. Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:240
>> +)
> 
> I doubt we need media-accessibility-support.

Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:290
>> +)
> 
> I don't we need the OpenGL support.

Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:383
>> +)
> 
> I doubt we need speech-synthesis-and-voiceover.

Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:434
>> +)
> 
> We probably do not need dictionary-support.

Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:538
>> +           (extension "com.apple.security.exception.iokit-user-client-class"))
> 
> Please also remove this rule (See Bug 218596). We don't issue this extension to WebKit, ever.

Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:544
>> +           (extension "com.apple.security.exception.shared-preference.read-write"))
> 
> Please also remove this rule (see Bug 218594). We don't issue this extension to WebKit, ever.

Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:579
>> +    (global-name "com.apple.tccd"))
> 
> I don't think we need this, but since it's generating telemetry you can keep it so we can double-check.

Got you.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:665
>> +(play-media)
> 
> I doubt we need these.

Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:668
>> +(media-remote)
> 
> Delete this please.

Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:674
>> +    (global-name "com.apple.TextInput"))
> 
> I doubt we need this.

Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:678
>> +(speech-synthesis-and-voiceover)
> 
> Delete this please.

Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:681
>> +    (global-name "com.apple.audio.AudioComponentRegistrar"))
> 
> Delete this please.

Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:688
>> +    "/systemgroup.com.apple.nsurlstoragedresources/Library/dafsaData.bin")
> 
> Seems very unlikely we need this.

Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:707
>> +)
> 
> It seems very unlikely we need these.

Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:724
>> +    (global-name "com.apple.iconservices"))
> 
> It seems unlikely we need this stuff.

Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:738
>> +(dictionary-support)
> 
> Delete this, please.

Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:748
>> +(framebuffer-access)
> 
> Seems unlikely

Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:751
>> +(opengl)
> 
> Seems very unlikely

Removed.

[Jiewen Tan]

Created attachment 413264 [details]
Patch

[Jiewen Tan]

Created attachment 413387 [details]
Patch

[Brent Fulgham]

Comment on attachment 413387 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=413387&action=review

Can you please file a radar to audit the sandbox? I think both WebAuthn sandoxes contain tons of stuff we don't need, and we should clean that up before we turn this on for people. But r=me for this work in progress.

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:111
> +           (xpc-service-name "com.apple.audio.toolbox.reporting.service")))

I'll bet we don't need "play-audio"

> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:189
> +)

I'll bet we don't need this "play-media" bit at all.

[Jiewen Tan]

Comment on attachment 413387 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=413387&action=review

Thanks Brent for r+ this patch.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:111
>> +           (xpc-service-name "com.apple.audio.toolbox.reporting.service")))
> 
> I'll bet we don't need "play-audio"

Removed.

>> Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebAuthn.sb:189
>> +)
> 
> I'll bet we don't need this "play-media" bit at all.

Removed.

[Jiewen Tan]

Created attachment 413500 [details]
Patch for landing

[EWS]

Committed r269554: <https://trac.webkit.org/changeset/269554>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 413500 [details].