After RSA public key encryption, I am unable to decrypt it. It shows an error message: 'Error: Expected a value of type 'ASN1Integer', but got one of type 'ASN1Sequence'.

[hardgit]

Hey! I found that I couldn't parse the encrypted information given to me by the Java backend using your plugin. When I tried to decrypt it, I kept getting an error message that says: Error: Expected a value of type 'ASN1Integer', but got one of type 'ASN1Sequence'.

publicKey
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCEwyQppT7udd86Oa7nKll+sKziM6CIXBbxPMgp+2Pg9de+ZZ1c0BFlAZ8C6kcr9Lfhjw/+Hyg88VeZBS1J1rtO6LOeBmvNQIBmt37xpFJMORSpJiIP3wh+beSxjVVqJ+DPM9kot7qtj7aT6klNR+LHiMbx5iYwu4xF/XEK3CM4hwIDAQAB

privateKey
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

The encrypted string：
Gu9pld1y6XdkebQ+LWDheABBwpCnWalT1hoiYeltPD5Bkxp0aN908WBtRzsf3Z5Uo9FwoPAdcOsU7dHY6zbV8SG5+Rm6PUrkXd/3lWfERBxQNtcz+b1Z9GPcrqulSvdrfJhS6MeBUDvZwpaMRewuru5Co/otytkJmZyBnDgI888=

error：
Unhandled exception: type 'ASN1Sequence' is not a subtype of type 'ASN1Integer' in type cast #0 RSAKeyParser._parsePrivate (package:encrypt/src/algorithms/rsa.dart:240:43) #1 RSAKeyParser.parse (package:encrypt/src/algorithms/rsa.dart:222:14) #2 parseKeyFromFile (package:encrypt/encrypt_io.dart:10:17) <asynchronous suspension> #3 main (package:slvers/rsa.dart:11:19) <asynchronous suspension>

Can you tell me how to successfully decrypt it?

[rayone08]

from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_v1_5
from base64 import b64decode

The RSA private key (provided)

private_key_pem = """-----BEGIN PRIVATE KEY-----
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
-----END PRIVATE KEY-----"""

encrypted_string_b64 = "Gu9pld1y6XdkebQ+LWDheABBwpCnWalT1hoiYeltPD5Bkxp0aN908WBtRzsf3Z5Uo9FwoPAdcOsU7dHY6zbV8SG5+Rm6PUrkXd/3lWfERBxQNtcz+b1Z9GPcrqulSvdrfJhS6MeBUDvZwpaMRewuru5Co/otytkJmZyBnDgI888="

try:
encrypted_data = b64decode(encrypted_string_b64)
except Exception as e:
print(f"Error during base64 decoding: {e}")
encrypted_data = None

if encrypted_data:
private_key = RSA.import_key(private_key_pem)
cipher = PKCS1_v1_5.new(private_key)

try:
    # Decrypt the message
    decrypted_data = cipher.decrypt(encrypted_data, None)  
    print("Decrypted Message:", decrypted_data.decode('utf-8'))
except ValueError as e:
    print(f"Error during decryption: {e}")
    
    #Decrypted Message: qwerty   
    #incorrect Padding Scheme, use  PKCS1_v1_5