Am I doing this right? (requesting decryption key from license server)

[rajhlinux]

Hello everyone, I an error when I use:

http://getwvkeys.cc/

The error is:

Wrong headers: mapping values are not allowed here in "<unicode string>", line 10, column 1784: ... t_auth_information="{\"backend\": \"udemy-auth\"\054 \"suggested ... ^

Here are the details for Key, PSSH and headers:

https://pastebin.com/nvmRShR1

I attached a pic.

Thanks

[lfer94]

Try only these request headers

accept-encoding:
accept-language:
content-length:
cookie:
origin: 
referer: 
user-agent: 
x-kl-ajax-request:

And add quotes to the value of content lenght

content-length: "4212"

[rajhlinux]

Thanks will try that.

[rajhlinux]

Try only these request headers

accept-encoding:
accept-language:
content-length:
cookie:
origin: 
referer: 
user-agent: 
x-kl-ajax-request:

And add quotes to the value of content lenght

content-length: "4212"

oh good lord lol

It worked, Thank You very much kind sir.

I got 3 keys which I assume are decryption keys.

I'll now use this opensource downloader tool, which supports downloading DRM content with decryption keys:

https://github.com/Puyodead1/udemy-downloader

Will let you know if it works...

Thanks again.

[rajhlinux]

What is the difference between:

Decryption Key ID and Decryption Key?

Is one of the the "KEY ID" which is found in the ".mpd" file used to obtain the PSSH?

Thanks.

[[ss]vegeta]

Decryption Key ID and Decryption Key?

Key ID is on the left from the colon :, decryption key is on the right of the colon

[mahdisky]

but not work for me
what is in cookie: ?

[[ss]vegeta]

what is in cookie: ?

Cookie stuff.

[mahdisky]

can u do it for sample "rajhlinux" first post?

[lfer94]

but not work for me
what is in cookie: ?

That depends on each website.

can u do it for sample "rajhlinux" first post?

Show us your case and maybe we can help you.

[mahdisky]

but not work for me
what is in cookie: ?

That depends on each website.

can u do it for sample "rajhlinux" first post?

Show us your case and maybe we can help you.

pssh:
AAAAMnBzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAABISEJZXEc Pmk0jZmB0ciU6zEhk=

[lomero]

again udemy ... this forum is full to this argument ...

[rajhlinux]

Decryption Key ID and Decryption Key?

Key ID is on the left from the colon :, decryption key is on the right of the colon

I'm a bit confused, I want to download a course, and there are 72 videos in that course.

From my understanding it true that I need 72 unique KEY ID and just 1 Decryption ID?

How can I manually download the encrypted video and decrypt it on my computer using bento tools or what not?

IDM downloader only downloads like 1MB or 20KB files... seems like these videos are split and encrypted into tiny pieces and are decrypted and stitched together on real time on the browser.

Generally do not like using scripts.

Thanks.

[rajhlinux]

I put the Key ID on the left and one out of the three Decryption Key on the right...

When I type this command:

C:\Users\Admin\Downloads\udemy\udemy-downloader-master>python main.py -c https://www.udemy.com/course/day-trading-strategies-day-trading-with-technical-analysis/learn/ -q 1080

I get the following:

Traceback (most recent call last):
File "C:\Users\Admin\Downloads\udemy\udemy-downloader-master\main.py", line 1939, in <module>
pre_run()
File "C:\Users\Admin\Downloads\udemy\udemy-downloader-master\main.py", line 269, in pre_run
keys = json.loads(keyfile.read())
File "C:\Users\Admin\AppData\Local\Programs\Python\Pyth on39\lib\json\__init__.py", line 346, in loads
return _default_decoder.decode(s)
File "C:\Users\Admin\AppData\Local\Programs\Python\Pyth on39\lib\json\decoder.py", line 337, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "C:\Users\Admin\AppData\Local\Programs\Python\Pyth on39\lib\json\decoder.py", line 353, in raw_decode
obj, end = self.scan_once(s, idx)
json.decoder.JSONDecodeError: Expecting property name enclosed in double quotes: line 2 column 3 (char 4)

[rajhlinux]

Ok seems like I put the keys wrong, needed to add the quotes to the keyfile.json----> " " : " "


But now I get this error:

C:\Users\Admin\Downloads\udemy\udemy-downloader-master>python main.py -c https://www.udemy.com/course/day-trading-strategies-day-trading-with-technical-analysis/learn/ -q 1080
[08:25:51] [udemy-downloader] [__init__:296] INFO: Login Success
[08:25:51] [udemy-downloader] [main:1661] INFO: > Fetching course information, this may take a minute...
[08:25:51] [udemy-downloader] [_subscribed_courses:619] CRITICAL: Udemy Says: 'latin-1' codec can't encode character '\u2026' in position 400: ordinal not in range(256) on https://www.udemy.com/api-2.0/users/me/subscribed-courses?fields[course]=id,url,title,published_title&page=1&page_size=500 &search=day-trading-strategies-day-trading-with-technical-analysis

[rajhlinux]

Ok, the creator knows it is bug, he never cared to get into it.

I guess I have to do things manually (which I prefer).

How can I download all of the little chunks of encrypted videos to a folder where all the videos are in synchronized order?

[dark125]

Ok, the creator knows it is bug, he never cared to get into it.

I guess I have to do things manually (which I prefer).

How can I download all of the little chunks of encrypted videos to a folder where all the videos are in synchronized order?

Looks like he already fixed it

[rajhlinux]

Looks like he already fixed it

Thanks for the reply.

I just downloaded the updated git and extracted it.

I get the same error.


[Attachment 64006 - Click to enlarge]

[kingsun8877]

Hello everyone, I an error when I use:

http://getwvkeys.cc/

The error is:

Wrong headers: mapping values are not allowed here in "<unicode string>", line 10, column 1784: ... t_auth_information="{\"backend\": \"udemy-auth\"\054 \"suggested ... ^

Here are the details for Key, PSSH and headers:

https://pastebin.com/nvmRShR1

I attached a pic.

Thanks

how to get PSSH from udemy? could you tell me how to get it ，Thank you very much!

[rajhlinux]

Alright I seem to got it working on downloading the encrypted video so that I can later decrypt it on computer:

I use this program called "yt-dlp".

This is the command I enter on CMD:

yt-dlp --allow-unplayable-formats --force-generic-extractor "https://www.udemy.com/assets/16986082/encrypted-files/out/v1/c16e00cbe8e74fd883cd35ee9a33c7bf/06c8dc12da2745f1b0b4e7c2c032dfef/842d4b8e2e014fbbb87c640ddc89d036/index.mpd?token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1Ni J9.eyJwYXRoIjoib3V0L3YxL2MxNmUwMGNiZThlNzRmZDg4M2N kMzVlZTlhMzNjN2JmLzA2YzhkYzEyZGEyNzQ1ZjFiMGI0ZTdjM mMwMzJkZmVmLzg0MmQ0YjhlMmUwMTRmYmJiODdjNjQwZGRjODl kMDM2LyIsImV4cCI6MTY0ODI4NjIxNX0.wReSM4Q72bdTgnD7X Gf8REQ3-QuDdXnVg0gjUOX1FrU&provider=cloudfront&v=1" -o output.mp4

Need to use "--force-generic-extractor" to get it working else it wont download anything.


Then I tried decrypting the video and audio using "shaka-packager".

This is the command I enter on CMD:

shaka-packager.exe input=C:\Users\Admin\Downloads\udemy\output.f10.mp 4,stream=video,output=C:\Users\Admin\Downloads\ude my\decrypttt.mp4.mp4 input=C:\Users\Admin\Downloads\udemy\output.f20.m4 a,stream=audio,output=C:\Users\Admin\Downloads\ude my\decryptt_audio.m4a --enable_raw_key_decryption --keys label=0:key_id=75175f4a6e1c40a597273c3b41339246:ke y=d4d019341ba95d60be4b560e6e877ebd:87651d63fa52676 672a714815c64f5d9


However both video and audio are not decrypted (same goes for using "bento mp4decrypt")...

This is the CDM I used: http://getwvkeys.cc/

Here is the ".mpd" file:
https://pastebin.com/UwwHJhTF

Here are the details for Key ID, PSSH and Headers:
https://pastebin.com/nvmRShR1

Here is the decrypt key: aefc537bda2a545a80d72d93824ffcc9:32fccf818a6e210d8 ef1acec269deb6d

Here are the encrypted video and audio file to inspect/test:
https://drive.google.com/drive/folders/1oR9kn3yTN6jRBo1HCvBvx-jH0GLOaQkP?usp=sharing

Thanks

[lomero]

many treads all with the same final answer ...

we all here hope you have solved, so as not to hear your boring cause on udemy anymore...

[mahdisky]

many treads all with the same final answer ...

we all here hope you have solved, so as not to hear your boring cause on udemy anymore...

can u help?

[lfer94]

Here are the details for Key ID, PSSH and Headers:
https://pastebin.com/nvmRShR1

These are supposed to be the KIDs:Keys

aefc537bda2a545a80d72d93824ffcc9:32fccf818a6e210d8ef1acec269deb6d
d4d019341ba95d60be4b560e6e877ebd:87651d63fa52676672a714815c64f5d9
32ef1e4098665cfbb042d712b6ec527f:33750ba44971a46f9318a5984eb74769

Here are the encrypted video and audio file to inspect/test:
https://drive.google.com/drive/folders/1oR9kn3yTN6jRBo1HCvBvx-jH0GLOaQkP?usp=sharing

But the default_KID (75175f4a6e1c40a597273c3b41339246) of those files does not match any of them. I have no idea what could be the problem.

[rajhlinux]

Here are the details for Key ID, PSSH and Headers:
https://pastebin.com/nvmRShR1

But the default_KID (75175f4a6e1c40a597273c3b41339246) of those files does not match any of them. I have no idea what could be the problem.

Thank You very much.

So from my understanding, the default key id should at least match one of the 3 key id given by the CDM?

Interesting, because I think I read on the 60 page thread somewhere on this forum that the decryption keys could be wrong in some cases.


CDM delivery shows:

License:https://widevine-proxy.appspot.com/proxy

But the actual license server is:

https://www.udemy.com/api-2.0/media-license-server/validate-auth-token?drm_type=widevi...j0MsK6fccskyGw

Does both license links needs to match as a status of good confirmation?


[Attachment 64022 - Click to enlarge]:


Thanks.

[masuma]

rajhlinux - I think you are using the wrong keys. I think the keys shown in the picture you have attached are from cache (that belongs to the default license url widevine-proxy). If you uncheck the "Cache" box, are you getting new keys or error? I am having the same problem for another site and I am getting ERROR after following this awesome url step by step -> https://streamable.com/umoszy

[ElCap]

CDM delivery shows:

License:https://widevine-proxy.appspot.com/proxy

But the actual license server is:

https://www.udemy.com/api-2.0/media-license-server/validate-auth-token?drm_type=widevi...j0MsK6fccskyGw

Does both license links needs to match as a status of good confirmation?

Thanks.

Those are keys cached by someone else. untick the Cache box to get the real response from the license server.
Yes, the license server urls should match to confirm that they are correct keys.
https://widevine-proxy.appspot.com/proxy is a demo license server which will respond with keys to any pssh, so it generates a lot of false positives.

[kingsun8877]

Try only these request headers

accept-encoding:
accept-language:
content-length:
cookie:
origin: 
referer: 
user-agent: 
x-kl-ajax-request:

And add quotes to the value of content lenght

content-length: "4212"

I check out many times but got the same error, I don't know what's wrong with it. could you help me? Thank you!

ERROR:
Wrong headers: mapping values are not allowed here in "<unicode string>", line 4, column 2013: ... t_auth_information="{\"backend\": \"udemy-auth\"\054 \"suggested ... ^

[Attachment 64033 - Click to enlarge]
PSSH and request headers:
https://pastebin.com/kPPSaNTq

[lfer94]

I check out many times but got the same error, I don't know what's wrong with it. could you help me? Thank you!

ERROR:
Wrong headers: mapping values are not allowed here in "<unicode string>", line 4, column 2013: ... t_auth_information="{\"backend\": \"udemy-auth\"\054 \"suggested ... ^

[Attachment 64033 - Click to enlarge]
PSSH and request headers:
https://pastebin.com/kPPSaNTq

Copy the rest of the request and response headers on pastebin and share it here

[kingsun8877]

I check out many times but got the same error, I don't know what's wrong with it. could you help me? Thank you!

ERROR:
Wrong headers: mapping values are not allowed here in "<unicode string>", line 4, column 2013: ... t_auth_information="{\"backend\": \"udemy-auth\"\054 \"suggested ... ^

[Attachment 64033 - Click to enlarge]
PSSH and request headers:
https://pastebin.com/kPPSaNTq

Copy the rest of the request and response headers on pastebin and share it here

the rest of the request and response headers:
https://pastebin.com/YTrWjmJY

Thank you!

[lfer94]

the rest of the request and response headers:
https://pastebin.com/YTrWjmJY

Thank you!

I thought there would be another header that might help, but no.

I tried several times but it gives the same error. I honestly don't know why. Sorry.