import os
from cryptography.hazmat.primitives.ciphers.modes import CBC
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
from cryptography.hazmat.primitives import padding
import base64
import binascii

def bin2hex(binStr):
    return binascii.hexlify(binStr)

def hex2bin(hexStr):
    return binascii.unhexlify(hexStr)

iv = hex2bin("6e657665726d696e647468656e66756b")
key = hex2bin("6e6565726d666e646e6565726d666e64")

mode = CBC(iv)

cipher = Cipher(algorithms.AES(key), mode)

encryptor = cipher.encryptor()

padder = padding.PKCS7(128).padder()

payload_string = """{"public_key":"-----BEGIN PUBLIC KEY-----\\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzJN9ALFoUHE8SigFhtql
\\n+GPI6dIVHDCfAFXe6DU131yXoL14imBRBb5SevMou5WGiL7XBTdtlRaY8+dkNdFz\\nWEMhPoe++/GvV3u6Mq6UAJMjuiJj838NbJVl+83+NEP66htXpqidTIdr
7syaRU1T\\n0PfgvVYdNkwiWkTVtwveRchGtUwp2iZePMSF1+vtKKDvzXgZuwrKBhwBFXz6ApSZ\\n+eGkWhK1pW6TRTSENlySwb/DEg5PckzOzApLTTQqi4uu+sHU
D+McAtOP9pNILwst\\nG87LxNEO0roFqUaDIhRolgkF8jol2BUZmKChdy84XX+L6jpqDvPsxuTUpIghr0Jq\\nvQIDAQAB\\n-----END PUBLIC KEY-----","st
udent_id":"e223795","passwd":"pmcTCKox99NFsqp"}"""

byte_guys = str.encode(payload_string)
padded_data = padder.update(byte_guys)

ct = encryptor.update(padded_data) + encryptor.finalize()

c = base64.b64encode(ct)

import Crypto
from Crypto.Cipher import PKCS1_OAEP
from Crypto.PublicKey import RSA

gradecoin_key = """-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyGuqiCPGcguy+Y9TH7Bl
7XlEsalyqb9bYlzpbV0dnqZ3lPkEPkuOhkN+GcuiV6iXtSwyh7nB+xTRXKJFRUBO
/jbN8jfcxVwBu0JxjF3v1YRBxbOHhz2A295mbKD9xHQCKxkfYBNkUXxj8gd+GaDv
QiSW5NdrX/lEkvqfGtdEX1m2+HdcG0+3YW24Xg0znhCwLr+sorLuJaDy9Xa0Uo+D
PWGC5s001U/BxkCIWJ+eJQCb7Bv+9vXb8BGRK/ecMb/fb6h5O+8fgB64RCHMgcc2
v+Q/dPt8kHX1OJdMuYUrUJGACppMQY3W6e1HdlRIBcZKL2LMZ2CrIB/2D5LiJhPT
hQIDAQAB
-----END PUBLIC KEY-----"""

publickey = RSA.import_key(gradecoin_key)

asy_cipher = PKCS1_OAEP.new(publickey, hashAlgo=Crypto.Hash.SHA256)
ciphertext = asy_cipher.encrypt(key)

key = base64.b64encode(ciphertext)