i try to write a code , whom encrypt my data , then i try to execute me code i get an error:
import base64
import boto3
from Crypto.Cipher import AES
PAD = lambda s: s + (32 - len(s) % 32) * ' '
def get_arn(aws_data):
return 'arn:aws:kms:{region}:{account_number}:key/{key_id}'.format(**aws_data)
def encrypt_data(aws_data, plaintext_message):
kms_client = boto3.client(
'kms',
region_name=aws_data['region'])
data_key = kms_client.generate_data_key(
KeyId=aws_data['key_id'],
KeySpec='AES_256')
cipher_text_blob = data_key.get('CiphertextBlob')
plaintext_key = data_key.get('Plaintext')
# Note, does not use IV or specify mode... for demo purposes only.
cypher = AES.new(plaintext_key, AES.MODE_EAX)
encrypted_data = base64.b64encode(cypher.encrypt(PAD(plaintext_message)))
# Need to preserve both of these data elements
return encrypted_data, cipher_text_blob
def main():
# Add your account number / region / KMS Key ID here.
aws_data = {
'region': 'eu-west-1',
'account_number': '70117777xxxx',
'key_id': 'xxxxxxx-83ac-4b5e-93d4-xxxxxxxx',
}
# And your super secret message to envelope encrypt...
plaintext = b'Hello, World!'
# Store encrypted_data & cipher_text_blob in your persistent storage. You will need them both later.
encrypted_data, cipher_text_blob = encrypt_data(aws_data, plaintext)
print(encrypted_data)
if __name__ == '__main__':
main()
this is an error:
PAD = lambda s: s + (32 - len(s) % 32) * ' ' TypeError: can't concat str to bytes maybe whom know where is a problem ? please suggest
Your function
PAD
is intended to work with astring
input and you call it with abytes
input (b'Hello, World!'
in your example).PAD('Hello, World!')
(without the leadingb
) works. One solution would be to pad the plaintext as astring
and convert it tobytes
afterwards, e.g.:plaintext = PAD('Hello, world!') plaintext_bytes = plaintext.encode('utf-8')
See this StackOverflow question for how to convert a
string
tobytes
.