Encrypting decrypted message result in different message from original

[johntiror]

Hi,

I'm having trouble changing the message content. I'm able to intercept the message and deprypt it. Once I modify the message (as in the video) I then press "Encrypt", I copy in the proxy, base64 decode it, but then the message does not appear in my web.whatsapp

I noticed that if I intercept a message, then decrypt and immediately encrypt (without any modification) if I compare the original message and the decrypted/encrypted one they are different. I expect them to be the same. Maybe there is a problem in the encryption?

Thanks

[romanzaikin]

@johntiror the message you write is in English?

Try to decrypt/encrypt same message and check if it works. Try to change 1 character, add characters or remove characters.

[johntiror]

Thanks for your feedback. The test I did were with random chars, but I guess it shouldn't be a problem, is it?

Here my test:

Message intercepted:

Message encoded in base64:

message copied to the whatsapp decoder:

message decrypted (it works!):

message encrypted without any modification: as you can see it's different than before the decryption

error message if I try to decrypt it again:

what can be the issue?

[c0d3x27]

@johntiror bro how did you get to decrypt it? i have the keys and the right ref but i keep getting error mine doesnt get decrypt.

[max194]

@Banginpadr before copying it you need to press ctrl + b, after pasting it you need to press ctrl + shift+ b (encoding and decoding as base64)

[c0d3x27]

@max194 max you are a good thank you so much. i just fix this problem to just find another one.. after i edit the messagge and crypt it again and past it to be send the message dont get send. the edit only happen in my cell not the person cell too

[romanzaikin]

@Banginpadr you can't send the message on behalf of someone else, you can just reply to it and everyone will see it or you can do other stuff as we wrote in our blog post.

[johntiror]

Why did you close it? My issue is still there as shown in the pictures

[c0d3x27]

@romanzaikin this is what im talking about. this is what i did. but in the replay the message is still the original

[romanzaikin]

@johntiror can you check now? I have fixed it in the new parser file

[ertza]

@romanzaikin Hi there, I'm still facing the exact same problem as faced by @johntiror. I have the latest code pulled and even without doing any modifications the encryption after decryption comes out to be different; and when this message is forwarded in burp suite proxy, nothing shows up in the Web WhatsApp. The encryption cannot be decrypted using the tool too so may be it is not encrypting the way it should?