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arturjanc's profile
Artur Janc
Artur Janc
Artur Janc
@arturjanc

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Artur Janc

@arturjanc

Making the web platform more secure one Twitter flamewar at a time.

Zurich, Switzerland
Joined February 2012

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    1. Scott Helme‏Verified account @Scott_Helme 9 Sep 2016
      Replying to @ndm @fugueish @metromoxie

      I thought all the cool kids were doing it these days? No? :(

      2 replies 0 retweets 1 like
    2. Lil' Oreo‏ @ndm 9 Sep 2016
      Replying to @Scott_Helme

      doubt it. Although it has been years since I've even tried. Was a shit show. Not sure how it would have improved.

      1 reply 0 retweets 0 likes
    3. Joel Weinberger‏ @metromoxie 9 Sep 2016
      Replying to @ndm @Scott_Helme

      Ah, yes, that's prob the issue. We should improve the error message in that case since a hash isn't going to help.

      1 reply 0 retweets 0 likes
    4. Scott Helme‏Verified account @Scott_Helme 9 Sep 2016
      Replying to @metromoxie @ndm

      https://www.w3.org/TR/CSP2/#style-src-hash-usage …

      2 replies 0 retweets 0 likes
    5. Artur Janc‏ @arturjanc 9 Sep 2016
      Replying to @Scott_Helme @metromoxie @ndm

      The CSP spec allows hashes for <style> elements, but not style="" attributes.

      1 reply 0 retweets 0 likes
    6. Artur Janc‏ @arturjanc 9 Sep 2016
      Replying to @arturjanc @Scott_Helme and

      It's similar to how you can use hashes for <script> blocks but not for event handlers (onclick, etc.)

      2 replies 0 retweets 0 likes
    7. Joel Weinberger‏ @metromoxie 9 Sep 2016
      Replying to @arturjanc @Scott_Helme @ndm

      @mikewest I thought that was added in CSP3? Am I mistaken?

      2 replies 0 retweets 0 likes
    8. Artur Janc‏ @arturjanc 9 Sep 2016
      Replying to @metromoxie @Scott_Helme @ndm

      CSP3 has 'unsafe-hashed-attributes' for this, but I expect @mikewest will take it out b/c of backcompat issues

      1 reply 0 retweets 0 likes
    9. Scott Helme‏Verified account @Scott_Helme 9 Sep 2016
      Replying to @arturjanc @metromoxie and

      oh, what's the prob?

      1 reply 0 retweets 0 likes
    10. Artur Janc‏ @arturjanc 9 Sep 2016
      Replying to @Scott_Helme @metromoxie and

      If you use style= or onclick= and set 'u-h-a' to allow them, this will break in UAs without 'u-h-a'

      1 reply 0 retweets 0 likes
      Artur Janc‏ @arturjanc 9 Sep 2016
      Replying to @arturjanc @Scott_Helme and

      Because they will see a hash and ignore 'unsafe-inline', so they will reject these attributes.

      2:06 PM - 9 Sep 2016
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Scott Helme‏Verified account @Scott_Helme 9 Sep 2016
          Replying to @arturjanc @metromoxie and

          so there will be no way to enable style="" if I want to use a nonce or a hash?

          1 reply 0 retweets 0 likes
        3. Artur Janc‏ @arturjanc 9 Sep 2016
          Replying to @Scott_Helme @metromoxie and

          The current proposal has problems so it depends on whether Mike finds a way to fix them. Maybe? :)

          1 reply 0 retweets 0 likes
        4. Artur Janc‏ @arturjanc 9 Sep 2016
          Replying to @arturjanc @Scott_Helme and

          FWIW in our apps we don't restrict style-src. Sec risk of inline styles is much less than of scripts

          0 replies 0 retweets 2 likes
        5. End of conversation

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