tys.py

from cryptography.hazmat.primitives import serialization, hashes
from cryptography.hazmat.primitives.asymmetric import rsa, padding
from cryptography.hazmat.backends import default_backend
import base64

# Your provided RSA parameters
e = 0x10001
n = 0xa8b99ec36a68336cb4fbac235a48d3b8c764ab8f215173d23fa9bcaf6ec11213a8ce08e2806bd40aa0c9daf35e12d78ebb86366475680c60cd125988831b193a1180c8ef70905480f21dad5c2306eb60c73a53c44312f2baf0cf5dd48dcd117287bfaf4ed3890c7adc8136f9b08158e2208d50262bd5d6b1ade2b86362de2021
private_d = 0xb4cb8764482f3f6d75ae0fd29d352360b40f74a9c1cd0c1dfdc07e7f6d7b95aa4e8d23085d7f7ef42587b51e6829878476b1cbe8434bf5e7528a369b255f727225b6af5ca7072acd027a19ea17d5bd25624a3947fcd956c11a97cc3707e32c2cb75c2aaf30089e3270327a9fb08a9eac83e5466f6ebe1d2ad5125efb71aad9 

ciphertext_b64 = "NLWFPYBfdl28jBYZm9ouVUTVmtpMu+d5VXZnEJqOJv1NYZEDOkZd1N/5y22h6I9vep2GRdaLK3N0BTo6U29zLDtTZHWQyMqCROac6WIp+8tpn13FtjNhNdRZFdF+OINmnrzmPAdnOgErDDnB/XRz3CR1uRNZ8ATV+zjgSqazDn8AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=="
ciphertext_bytes = base64.b64decode(ciphertext_b64)

private_key = rsa.RSAPrivateNumbers(
    p=None,  # Not required for decryption
    q=None,  # Not required for decryption
    d=private_d,
    dmp1=None,  # Not required for decryption
    dmq1=None,  # Not required for decryption
    iqmp=None,  # Not required for decryption
    public_numbers=rsa.RSAPublicNumbers(e=e, n=n)
).private_key(default_backend())

try:
    decrypted_message_pkcs = private_key.decrypt(
        ciphertext_bytes,
        padding.PKCS1v15()
    )
    print("Decrypted with PKCS1v1.5:", decrypted_message_pkcs.decode('utf-8'))
except Exception as e:
    print("Error with PKCS1v1.5:", str(e))

try:
    decrypted_message_oaep = private_key.decrypt(
        ciphertext_bytes,
        padding.OAEP(
            mgf=padding.MGF1(algorithm=hashes.SHA256()),
            algorithm=hashes.SHA256(),
            label=None
        )
    )
    print("Decrypted with OAEP:", decrypted_message_oaep.decode('utf-8'))
except Exception as e:
    print("Error with OAEP:", str(e))