pico ctfs rsa oracle

concept is like if i am encrypting "ashu" or any thing u type it enecrypts and decrypts and but if we are putting the given pass and i am getting something weired !!! here not enc or dec here!

insane@LAPTOP-V6HITT4P:~/picoctf$ nc titan.picoctf.net 55313
*****************************************
****************THE ORACLE***************
*****************************************
what should we do for you?
E --> encrypt D --> decrypt.
e
enter text to encrypt (encoded length must be less than keysize): ashu
ashu

encoded cleartext as Hex m: 61736875

ciphertext (m ^ e mod n) 3517841011285690826432124999096128484170052533807622875653565143803262008734237263929882610935358311546297187655151145744024317459418783452126778922443617

what should we do for you?
E --> encrypt D --> decrypt.
d
Enter text to decrypt: 3517841011285690826432124999096128484170052533807622875653565143803262008734237263929882610935358311546297187655151145744024317459418783452126778922443617
decrypted ciphertext as hex (c ^ d mod n): 61736875
decrypted ciphertext: ashu

what should we do for you?
E --> encrypt D --> decrypt.

below is the python script !!!

from pwn import *

context.log_level='critical'
p = remote("titan.picoctf.net", 61923)

p.recvuntil(b"decrypt.")

with open("password.enc") as file:
    c = int(file.read())

p.sendline(b"E")
p.recvuntil(b"keysize): ")
p.sendline(b"\x02")
p.recvuntil(b"mod n) ")

c_a = int(p.recvline())

p.sendline(b"D")
p.recvuntil(b"decrypt: ")
p.sendline(str(c_a*c).encode())
p.recvuntil(b"mod n): ")

password = int(p.recvline(), 16) // 2
password = password.to_bytes(len(str(password))-7, "big").decode("utf-8")

print("Password:", password)

openssl enc -aes-256-cbc -d -in secret.enc

and enter the pass we got by the python script and then upload it!!!

insane@LAPTOP-V6HITT4P:~/picoctf$ openssl enc -aes-256-cbc -d -in secret.enc
enter AES-256-CBC decryption password:
*** WARNING : deprecated key derivation used.
Using -iter or -pbkdf2 would be better.
picoCTF{su((3ss_(r@ck1ng_r3@_4955eb5d}insane@LAPTOP-V6HITT4P:~/picoctf$