k čemu v Adblocku Plus je sitekey funkčnost?
Zajímalo by mě, jaké má využití v Adblock Plus toto. Nějak nechápu, k čemu to jako má být dobré a pro koho a a kdo z toho má mít prospěch
Sitekey restrictions: The option sitekey=abcdsitekeydcba means that the filter should only be applied on pages that provide a public key and a signature which can be verified by that very same public key that is also contained in the filter (but without the trailing =). Multiple sitekeys can be specified using "|" as separator: with the option sitekey=abcdsitekeydcba|bcdesitekeyedcb the filter will only be applied on pages providing either sitekey "abcdsitekeydcba" or "bcdesitekeyedcb". This is similar to domain restrictions but allows covering scenarios where a single filter should apply to a very large number of domains. Note that sitekey restrictions require modifications on the server-side.
---Implementace na serveru
For a sitekey-restricted filter to apply, a webpage needs to return base64-encoded versions of the public key and a signature which Adblock Plus can validate. Currently, this means including them in both the HTTP response header (X-Adblock-Key: abcdpublickeydcba_abcdsignaturedcba) and the root tag of the document (<html data-adblockkey="abcdpublickeydcba_abcdsignaturedcba">).First you need to create a private RSA key (preferably 512 bit to keep the transfer volume low) and then a DER representation of the public key.
The data used for creating the signature is a concatenated list of request variables (namely URI, host and user agent) separated by the NUL character "\0". For example:
/index.html?q=foo\0www.example.com\0Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:30.0) Gecko/20100101 Firefox/30.0
Finally, generate the signature for this string by using the signature algorithm SEC_OID_ISO_SHA_WITH_RSA_SIGNATURE (default when using OpenSSL).