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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Setting navigationDelegate breaks WebCrypto API"
href="https://bugs.webkit.org/show_bug.cgi?id=156553">156553</a>
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<th>Summary</th>
<td>Setting navigationDelegate breaks WebCrypto API
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>Safari 9
</td>
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<th>Hardware</th>
<td>iOS
</td>
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<th>OS</th>
<td>iOS 9.3
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Normal
</td>
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<th>Priority</th>
<td>P2
</td>
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<th>Component</th>
<td>New Bugs
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>trygve.hardersen@gmail.com
</td>
</tr></table>
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<pre>I'm encountering strange behaviour in the WebCrypto API when setting the navigationDelegate of a WKWebView on iOS. After setting the delegate I can no longer store asymmetric keys from JavaScript as I'm getting a DataCloneError (25).
After looking through the source code I believe this is caused by this code in NavigationState.mm
m_navigationDelegateMethods.webCryptoMasterKeyForWebView = [delegate respondsToSelector:@selector(_webCryptoMasterKeyForWebView:)];
I can work around the issue by implementing this method in by navigationDelegate class:
- (NSData *)_webCryptoMasterKeyForWebView:(WKWebView *)sender {
return [NSData dataWithBytes:"\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f" length:16];
}
I've provided a sample key above. Obviously I would not like to rely on this private API.</pre>
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