Snapchat Image Decrypt - This Ruby script decrypts the blob received from the `bq/blob` endpoint. Many thanks to @kivikakk, @adamcaudill, @tlack, and @NeilHanlon for inspiration, code, guides, and of course, the encryption key.

snapchat_decrypt.rb

#!/usr/bin/env ruby

require 'openssl'

data = File.open('blob', 'r:ASCII-8BIT').read
c = OpenSSL::Cipher.new('AES-128-ECB')
c.decrypt
c.key = 'M02cnQ51Ji97vwT4'
o = ''.force_encoding('ASCII-8BIT')
data.bytes.each_slice(16) { |s| o += c.update(s.map(&:chr).join) }
o += c.final
File.open('blob.jpg', 'w') { |f| f.write(o) }

Any update for the latest version of Snapchat? I see there is a update on the python version that takes care of the new encryption implementation introduced in later version of Snapchat, md5, etc.

Updates? Did anyone solve the error?
`final': wrong final block length (OpenSSL::Cipher::CipherError)

This is no more working

M02cnQ51Ji97vwT4 is the old key
Need to find the new one

Any update on this?

snapchat_decrypt.rb Raw
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!/usr/bin/env ruby

require 'openssl'

data = File.open('blob', 'r:ASCII-8BIT').read
c = OpenSSL::Cipher.new('AES-128-ECB')
c.decrypt
c.key = 'M02cnQ51Ji97vwT4'
o = ''.force_encoding('ASCII-8BIT')
data.bytes.each_slice(16) { |s| o += c.update(s.map(&:chr).join) }
o += c.final
File.open('blob.jpg', 'w') { |f| f.write(o) }

Thank you for posting this code. I had a number of snapchat files to decrypt so added A loop
Snapchat = Dir["*.jpg.nomedia"]
Snapchat.each {joysantamaria
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!/usr/bin/env ruby

require 'openssl'

data = File.open('blob', 'r:ASCII-8BIT').read
c = OpenSSL::Cipher.new('AES-128-ECB')
c.decrypt
c.key = 'M02cnQ51Ji97vwT4'
o = ''.force_encoding('ASCII-8BIT')
data.bytes.each_slice(16) { |s| o += c.update(s.map(&:chr).join) }
o += c.final
File.open('blob.jpg', 'w') { |f| f.write(o) }

Can anyone walk me through this? From plugging in my phone into the computer(im guessing thats what youre supposed to (thats how lost I am)) to viewing the files. I'll give you a couple bucks through paypal if someone can do it and it works. Thanks!

key : M02cnQ51Ji97vwT4 is dead :'(

well, i would like that someone in this damn world teach this on video or something i just lost at least 28 photos of my story that couldn't be publicated still don't know why D: i'm so frustated right now... ): i tried everything D:

The blob files are no longer encrypted, you just have to add the extension .jpg

Please help me
I do not understand much about these matters
What should I do with this code?
@jamescmartinez