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463aa3a0fa
- Add CurrentCSSProperty context variable - Move Munge to its own class, derived off of SecureMunge. - Rename %URI.SecureMunge to %URI.Munge - Rename %URI.SecureMungeSecretKey to %URI.MungeSecretKey - Add extra substitutions for munge git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1803 48356398-32a2-884e-a903-53898d9a118a
30 lines
947 B
Plaintext
30 lines
947 B
Plaintext
URI.MungeSecretKey
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TYPE: string/null
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VERSION: 3.1.1
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DEFAULT: NULL
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--DESCRIPTION--
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<p>
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This directive enables secure checksum generation along with %URI.Munge.
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It should be set to a secure key that is not shared with anyone else.
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The checksum can be placed in the URI using %t. Use of this checksum
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affords an additional level of protection by allowing a redirector
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to check if a URI has passed through HTML Purifier with this line:
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</p>
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<pre>$checksum === sha1($secret_key . ':' . $url)</pre>
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<p>
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If the output is TRUE, the redirector script should accept the URI.
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</p>
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<p>
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Please note that it would still be possible for an attacker to procure
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secure hashes en-mass by abusing your website's Preview feature or the
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like, but this service affords an additional level of protection
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that should be combined with website blacklisting.
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</p>
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<p>
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Remember this has no effect if %URI.Munge is not on.
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</p>
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