Vevo sig changed again, please update for us! Thanks very much!

[mikeygao]

Is there any way to automatic the detecting and decrypting?

[vanilla38]

Confirmed, 83 length

[awojnowski]

Signature decryption algorithm (plug the encrypted signature into the hj function and it'll spit out the good signature):

function hj(a) {
    a = a.split("");
    a = a.reverse();
    a = a.slice(2);
    var b = a[0];
    a[0] = a[65 % a.length];
    a[65] = b;
    a = a.reverse();
    return a.join("")
};

[vanilla38]

really nice ! what do we dont implement it directly in the code instead of adding them manually ?
Thanks alot

[patrickslin]

Probably easier just to use the algo that @speedyapocalypse posted. :) New sig len 83 algo below anyway.

pairs:
9A61D36F6B2B3AE9AF4D1FDA56001BDFE4F285DD.A593443C93C5778C46676E05D8F5E8BA74E09A1818
9A61D36F6B2B3AE8AF4D1FDA56001BDFE4F285DD.A593443C93C5778C46676E05D8F5E8BA74E09A19

8F157756503C1118026EEE549D03EA4DF0642A2A.784F834B92CDC44CD9374C7A3E4FD0472E395DBABA
8F157756503C111A026EEE549D03EA4DF0642A2A.784F834B92CDC44CD9374C7A3E4FD0472E395DB8

python:
s[0:15] + s[80] + s[16:80] + s[15]

javascript
s.slice(0, 15).join('') + s[80] + s.slice(16, 80).join('') + s[15]

[vanilla38]

thanks alot btw, got any way to extract signatures ? in order to put in in this function ?

[mikeygao]

Great! It works again! Thank you so much for your wonderful done!

[AppliedEllipsis]

Pretty much a 1-1 conversion of speedyapocalypse's function for python, seems to work great.
Just replace the function in youtube.py

    def _decrypt_signature(self, s):
        """Turn the encrypted s field into a working signature"""
        s = list(s)
        s = s[::-1]
        s = s[2:]
        b = s[0]
        s[0] = s[65 % len(s)]
        s[65] = b
        return ''.join(s[::-1])

compressed a little

    def _decrypt_signature(self, s):
        """Turn the encrypted s field into a working signature"""
        s = list(s)[::-1][2:]
        b = s[0]
        s[0] = s[65 % len(s)]
        s[65] = b
        return ''.join(s[::-1])

or even

    def _decrypt_signature(self, s):
        """Turn the encrypted s field into a working signature"""
        s = list(s)[-3::-1]
        b = s[0]
        s[0] = s[65 % len(s)]
        s[65] = b
        return ''.join(s[::-1])

[jaimeMF]

Fixed, thanks for the report and for the algo.
@patrickslin thanks for the work. For other time, feel free to create a pull request, even if you just change the algo in _decrypt_signature, we'll update the signature tests and it will be much faster.