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import os
from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives.asymmetric import rsa
from cryptography.hazmat.primitives.serialization import (
Encoding,
PublicFormat,
PrivateFormat,
NoEncryption
)
from twilio.http.validation_client import ValidationClient
from twilio.rest import Client
ACCOUNT_SID = os.environ.get('TWILIO_ACCOUNT_SID')
AUTH_TOKEN = os.environ.get('TWILIO_AUTH_TOKEN')
def example():
"""
Example of using the ValidationClient for signed requests to Twilio.
This is only available to enterprise customers.
This will walkthrough creating an API Key, generating an RSA keypair, setting up a
ValidationClient with these values and making requests with the client.
"""
client = Client(ACCOUNT_SID, AUTH_TOKEN)
# Using Client Validation requires using API Keys for auth
# First create an API key using the standard account sid, auth token client
print('Creating new api key...')
api_key = client.new_keys.create(friendly_name='ClientValidationApiKey')
# Generate a new RSA Keypair
print('Generating RSA key pair...')
key_pair = rsa.generate_private_key(
public_exponent=65537,
key_size=2048,
backend=default_backend()
)
public_key = key_pair.public_key().public_bytes(Encoding.PEM, PublicFormat.SubjectPublicKeyInfo)
private_key = key_pair.private_bytes(Encoding.PEM, PrivateFormat.PKCS8, NoEncryption())
# Register the public key with Twilio
print('Registering public key with Twilio...')
credential = client.accounts.credentials.public_key.create(
public_key,
friendly_name='ClientValidationPublicKey'
)
# Create a new ValidationClient with the keys we created
validation_client = ValidationClient(
ACCOUNT_SID,
api_key.sid,
credential.sid,
private_key
)
# Create a REST Client using the validation_client
client = Client(api_key.sid, api_key.secret, ACCOUNT_SID, http_client=validation_client)
# Use the library as usual
print('Trying out client validation...')
messages = client.messages.list(limit=10)
for m in messages:
print('Message {}'.format(m.sid))
print('Client validation works!')
if __name__ == '__main__':
example()
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