search

suculent / thinx-aes-lib

AES wrapper for ESP8266/ESP32/Arduino/nRF5x
Other
118 stars 37 forks source link

base64_IV example encrypt different at arduino and node.js #28

Closed castrofernando closed 4 years ago

castrofernando commented 4 years ago

Hi, I'm trying to use the library example base64_IV, but find hard time to make it encrypt/decrypt same value in both platform. I'm just using the examples provided, then:

AESKey = '2B7E151628AED2A6ABF7158809CF4F3C'; IV = = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }

Arduino message: plaintext: Looks like key but it's not me. Ciphertext: 3gyjVxuUxHITR/GpNuNOOf1BFQwoWwQFcNwndmVw5Bm0KHF2pFtgV4gBobdvnO6G decrypted: Looks like key but it's not me.

NodeJS message: plaintext: Looks like key but it's not me. ciphertext: j0RFVdlKjYrwx17qzHdt45miHZWoErdyOahKNKM6KTM= Decrypted message: Looks like key but it's not me.

Also trying in some online AES converters no luck.

Any idea what could be wrong? Btw, thanks for sharing!

suculent commented 4 years ago

It should boil down to OAEP padding, as far as I remember. Also, you should not use the base64 example for starters. Use the simple one.

suculent commented 4 years ago

There was a bug with padding, causing always using CMS padding instead of Zero padding. Fixed in 2.1.9 as well as in the node.js code.