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Today, I will talk to you about the decryption of the encryption parameters of the FaceBook dynamic list, which may not be well understood by many people. in order to make you understand better, the editor has summarized the following contents for you. I hope you can get something according to this article.

The js of facebook encapsulates all functions in the fixed format _ d (), and then through the fixed function, by passing the function name parameter, calls the

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Call the function with fixed passing parameters:

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Https://www.facebook.com/pages_reaction_units/more/?page_id=7619396355&cursor=%7B%22card_id%22%3A%22videos%22%2C%22has_next_page%22%3Atrue%7D&surface=www_pages_home&unit_count=8&referrer&fb_dtsg_ag&__user=0&__a=1&__dyn=7AgNe5Gmawgrolg9odoyGzEy4QjFwn8S2Sq5UO5U4e1qzEjyQdxK5WAx-bxWUW16whoS2S4ogU9A3mcw8258e8hwj82oG7Elw86l0DwLwxw-KEdEnwho4a11zU4K1dx278-0CUrx62WUry8465o-cBKm1UwiE9E4aawDKi8wGwFyFE-1kwOwnolwBgK7o88vwlo2kwLwKG2q4U2IzUuxy5po5e1dw&__csr=&__req=b&__beoa=0&__pc=PHASED%3ADEFAULT&dpr=1&__rev=1001802011&__s=yjxmip % 3Av22nxa%3Adsen9l&__hsi=6801018320680499016-0&__comet_req=0&__spin_r=1001802011&__spin_b=trunk&__spin_t=1583485473

Among these parameters, _ dyn and _ _ s need to be cracked, and the other parameters can be obtained when you get the user's home page.

The encryption position of the _ dyn parameter, function.

The position of this parameter is a little disgusting. It appears as _ dyn in URL, but when you actually look for it, you will find that only one jsmod_key can be found.

Find the direct break point here, step by step, you will find that it is useless, click for a long time has not found anything.

This is the way to point for half a day is useless. If you encounter this, go straight to F 8. It will come out, and when you come out, you continue to click on F11.

Repeat this until you see the function getLoadedModuleHash above. OK! It worked. This is the entrance to encryption. Click F11 again. You will find the following way.

Put the breakpoint directly at return, and after one step, you will find that this is the value of _ dyn.

Note that if you have been unable to enter the getLoadedModuleHash method, it is recommended to refresh the page directly. The judgment logic here does not enter when the parameter _ dyn has a value.

_ _ s parameter decryption

It is spliced by three parameters generated by js.

The middle b is fixed after generation, and each user will generate a different b. If the one you've been crawling is this user, you don't have to refresh it. These values are Session in LocalSorage and TabId in Session Storage

After reading the above, do you have any further understanding of the decryption of FaceBook dynamic list encryption parameters? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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