TLDR;- RSA encryption/decryption oracle- The oracle gives the flag ciphertext and the public modulus- Just ask for the decryption of `c+n` where `c` is the flag ciphertext and `n` is the public modulus- Note: The server expects and sends all values as bytes with little endian ordering
[writeup](https://jsur.in/posts/2020-04-13-dawgctf-2020-writeups#cha-cha-real-smooth)