codekingpro/portable-devtools

1Generate a signed URL for Amazon CloudFront2^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^3 4The following example shows how to generate a signed URL for Amazon CloudFront.5Note that you will need the ``cryptography`` `library <https://cryptography.io/en/latest/>`__ to follow this example::6 7    import datetime8 9    from cryptography.hazmat.backends import default_backend10    from cryptography.hazmat.primitives import hashes11    from cryptography.hazmat.primitives import serialization12    from cryptography.hazmat.primitives.asymmetric import padding13    from botocore.signers import CloudFrontSigner14 15 16    def rsa_signer(message):17        with open('path/to/key.pem', 'rb') as key_file:18            private_key = serialization.load_pem_private_key(19                key_file.read(),20                password=None,21                backend=default_backend()22            )23        return private_key.sign(message, padding.PKCS1v15(), hashes.SHA1())24 25    key_id = 'AKIAIOSFODNN7EXAMPLE'26    url = 'http://d2949o5mkkp72v.cloudfront.net/hello.txt'27    expire_date = datetime.datetime(2017, 1, 1)28 29    cloudfront_signer = CloudFrontSigner(key_id, rsa_signer)30 31    # Create a signed url that will be valid until the specific expiry date32    # provided using a canned policy.33    signed_url = cloudfront_signer.generate_presigned_url(34        url, date_less_than=expire_date)35    print(signed_url)36