Hi, Does anyone know how to port this line of code to elixir ? :slight_smile: mcrypt_decrypt(MCRYPT_RIJNDAEL_256, "secret012345678901112131", base64_decode("EpbcxI+iu6kKVVDFUBSFc3EVGzS+dm9vMcVqImcCvEY="), MCRYPT_MODE_ECB) # result of this function is "test" I tried :crypto.crypto_one_time with di…

Looks like this will handle RIJNDAEL_256 cyphers: elixir-mcrypt/lib/mcrypt.ex at master · system76/elixir-mcrypt · GitHub , Its 6 years old though, probably only built to handle some forward porting of old code. It may still work it may not. Poking around it seems that MCRYPT_RIJNDAEL_256 is a non-s…

I tried a couple of combination while on a coffee break, but couldn’t find the right one, but I’ll leave here some hints that still may help: (nope) RIJNDAEL_256 in MODE_ECB should map to :aes_256_ecb AFAIK ← I was wrong, it is a variation, so this post is wrong! Sorry for that, I have been mislea…

[image] soup: Looks like this will handle RIJNDAEL_256 cyphers: elixir-mcrypt/mcrypt.ex at master · system76/elixir-mcrypt · GitHub , Its 6 years old though, probably only built to handle some forward porting of old code. It may still work it may not. According this issue block encoding does n…

[image] zoten: Will try again alter maybe, but let us know if you find a correct translation in the meantime! I will post a solution if I find one :wink:

[image] naytro: I also can’t change the encryption method or decrypt/re-encrypt existing data because data that was encrypted with this cypher is a cookies data If it is a cookie, is it not acceptable to lose the current data and start with a new algorithm in PHP and Elixir?

[image] lud: If it is a cookie, is it not acceptable to lose the current data and start with a new algorithm in PHP and Elixir? Unfortunately I cannot lose this data :frowning:

Pass-through to a PHP “”“micro service”“” to decode the cookie and pass it back to Elixir to re-negotiate. Probably what I’d do if pressed and really wanted to get the elixir app into production. Depends on your timeline, if 3 months is the cutoff, and you wont be in prod before then, just patch th…

Exactly, if you cannot lose this data then you have to convert to a new encrytption algorithm with PHP and start deploying elixir not before three months. This is the safe way. Hopefully you will find a way to do the conversion in Elixir directly.

I’d probably just embed a small php script in the elixir project and drive it with System.cmd or a port to encode data to something elixir understands and then reencode in a format more suited to elixir. Add some metric collection to see how often the fallback to php is actually needed and once it’s…

Yes, this is the way. Forgot you can just use php directly without other interface. This is pretty easy to deploy and manage while keeping your green fields … greenish.

Porting one function from php to elixir

Questions & Help Questions

naytro February 24, 2022, 3:48am 7

Unfortunately I cannot lose this data