29305 2009-09-16 10:44:12 -0700 Canvas drawn with data URL image raises SECURITY_ERR when toDataUrl() called. 2009-12-29 14:51:38 -0800 1 1 1 Unclassified WebKit DOM 528+ (Nightly build) All All RESOLVED FIXED P2 Normal --- 1 abarth webkit-unassigned annevk ap evan ian oliver sam webkit oldest_to_newest 147561 0 abarth 2009-09-16 10:44:12 -0700 Importing issue http://code.google.com/p/chromium/issues/detail?id=21847 Reported by btlee@google.com, Yesterday (36 hours ago) Chrome Version : 4.0.206.1 (Official Build 25376) URLs (if applicable) : http://members.shaw.ca/briantclee/canvas.html Other browsers tested: Add OK or FAIL after other browsers where you have tested this issue: Safari 4: FAIL. Firefox 3.x: OK Opera 10: OK IE 7: FAIL. Canvas not supported. IE 8: FAIL. Canvas not supported. What steps will reproduce the problem? 1. Have a webpage: 1. Create an Image from a data URL. 2. Create a canvas. 3. Draw the image to the canvas. 4. Call canvas.toDataURL(). 2. Launch the webpage. What is the expected result? toDataURL() returns a data URL for the image drawn to the canvas. What happens instead? Error in the console: "Uncaught Error: SECURITY_ERR: DOM Exception 18". Drawing from an image with source being a data URL seems to set the origin-clean flag false. I don't think this should be although it doesn't explicitly mention this in http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html 147593 1 sam 2009-09-16 13:08:46 -0700 We should make sure to test svg data urls to make sure they don't get through. 147700 2 abarth 2009-09-16 18:35:52 -0700 (In reply to comment #1) > We should make sure to test svg data urls to make sure they don't get through. You mean something like data:text/svg,<svg>... ? Why shouldn't that get through? 147733 3 oliver 2009-09-16 21:35:26 -0700 (In reply to comment #2) > (In reply to comment #1) > > We should make sure to test svg data urls to make sure they don't get through. > > You mean something like data:text/svg,<svg>... > ? > > Why shouldn't that get through? The specific issue i think is that you can do data:application/xml+svg,<svg><image src="evil.com"/></svg> or whatever. However i *think* we would catch that as being a multi-origin source. I think Sam's point was that we need to have a test that ensures the correct restrictions are in place. 148494 4 abarth 2009-09-19 08:57:52 -0700 This is fallout from our treatment of data URLs being different than required by the HTML5 spec: === If a Document or image was generated from a data: URL found in another Document or in a script The origin is the origin of the Document or script in which the data: URL was found. === We'll want to think carefully before adopting this requirement, but I think we can fix the canvas behavior independently. 148500 5 39820 abarth 2009-09-19 09:46:13 -0700 Created attachment 39820 Patch v1 148501 6 39820 oliver 2009-09-19 09:49:47 -0700 Comment on attachment 39820 Patch v1 r=me, we should fix tracking of data url origin as well i guess 148502 7 abarth 2009-09-19 09:56:34 -0700 Thanks for the review. I think Maciej has strong opinions about the data URL / noAccess thing. We'd definitely want to talk with him before changing it. 148503 8 evan 2009-09-19 09:59:11 -0700 + Test that drawing a data URL image onto a canvas behaves as expected. + Note the tricky case involving an data URL SVG image with an embedded + remote image. Typo: "an data URL". 148504 9 abarth 2009-09-19 10:06:15 -0700 > Typo: "an data URL". Thanks. I'll fix it on landing. 148505 10 abarth 2009-09-19 10:17:32 -0700 Committed r48556: <http://trac.webkit.org/changeset/48556> 148507 11 abarth 2009-09-19 10:19:38 -0700 *** Bug 17150 has been marked as a duplicate of this bug. *** 175697 12 webkit 2009-12-29 13:27:39 -0800 Hi. It seems this problem is back. Tested in nightly WebKit-r52593 on Windows. Given testcase does not show data url. Problem seems to be fixed in nightly Chrome build (r30453) though. 175702 13 abarth 2009-12-29 14:00:39 -0800 Can you file a new bug and CC the relevant folks? Odd that the test didn't catch the regression... 175716 14 webkit 2009-12-29 14:51:38 -0800 See Bug 33029 39820 2009-09-19 09:46:13 -0700 2009-09-19 09:49:47 -0700 Patch v1 bug-29305-20090919094611.patch text/plain 14879 abarth ZGlmZiAtLWdpdCBhL0xheW91dFRlc3RzL0NoYW5nZUxvZyBiL0xheW91dFRlc3RzL0NoYW5nZUxv ZwppbmRleCBhYjA1ODM0Li5mYjI1OGVmIDEwMDY0NAotLS0gYS9MYXlvdXRUZXN0cy9DaGFuZ2VM b2cKKysrIGIvTGF5b3V0VGVzdHMvQ2hhbmdlTG9nCkBAIC0xLDMgKzEsMjQgQEAKKzIwMDktMDkt MTkgIEFkYW0gQmFydGggIDxhYmFydGhAd2Via2l0Lm9yZz4KKworICAgICAgICBSZXZpZXdlZCBi eSBOT0JPRFkgKE9PUFMhKS4KKworICAgICAgICBDYW52YXMgZHJhd24gd2l0aCBkYXRhIFVSTCBp bWFnZSByYWlzZXMgU0VDVVJJVFlfRVJSIHdoZW4gdG9EYXRhVXJsKCkgY2FsbGVkLgorICAgICAg ICBodHRwczovL2J1Z3Mud2Via2l0Lm9yZy9zaG93X2J1Zy5jZ2k/aWQ9MjkzMDUKKworICAgICAg ICBUZXN0IHRoYXQgZHJhd2luZyBhIGRhdGEgVVJMIGltYWdlIG9udG8gYSBjYW52YXMgYmVoYXZl cyBhcyBleHBlY3RlZC4KKyAgICAgICAgTm90ZSB0aGUgdHJpY2t5IGNhc2UgaW52b2x2aW5nIGFu IGRhdGEgVVJMIFNWRyBpbWFnZSB3aXRoIGFuIGVtYmVkZGVkCisgICAgICAgIHJlbW90ZSBpbWFn 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