EdgeAuth-Token-Python: Akamai Edge Authorization Token for Python

EdgeAuth-Token-Python is Akamai Edge Authorization Token in the HTTP Cookie, Query String, and Header for a client. You can configure it in the Property Manager at https://control.akamai.com. It's a behavior which is Auth Token 2.0 Verification.

EdgeAuth-Token-Python supports Python 2.6–2.7 & 3.3–3.6 and runs great on PyPy.

Installation

To install Akamai Edge Authorization Token for Python:

$ pip install akamai-edgeauth

Example

from akamai.edgeauth import EdgeAuth, EdgeAuthError
import requests # just for this example

ET_HOSTNAME = 'edgeauth.akamaized.net'
ET_ENCRYPTION_KEY = 'YourEncryptionKey'
DEFAULT_WINDOW_SECONDS = 500 # seconds

• ET_ENCRYPTION_KEY must be hexadecimal digit string with even-length.
• Don't expose ET_ENCRYPTION_KEY on the public repository.

URL parameter option

# 1) Cookie
et = EdgeAuth(**{'key': ET_ENCRYPTION_KEY,
                  'window_seconds': DEFAULT_WINDOW_SECONDS})
token = et.generate_url_token("/akamai/edgeauth")
url = "http://{0}{1}".format(ET_HOSTNAME, "/akamai/edgeauth")
response = requests.get(url, cookies={et.token_name: token})
print(response) # Maybe not 403

# 2) Query string
token = et.generate_url_token("/akamai/edgeauth")
url = "http://{0}{1}?{2}={3}".format(ET_HOSTNAME, "/akamai/edgeauth", et.token_name, token)
response = requests.get(url)
print(response)

• 'Escape token input' option in the Property Manager corresponds to 'escape_early' in the code.

  Escape token input (on) == escape_early (True)

  Escape token input (off) == escape_early (False)

• In [Example 2] for Query String, it's only okay for 'Ignore query string' option (on).

• If you want to 'Ignore query string' option (off) using query string as your token, Please contact your Akamai representative.

ACL(Access Control List) parameter option

# 1) Header using *
et = EdgeAuth(**{'key': ET_ENCRYPTION_KEY,
                  'window_seconds': DEFAULT_WINDOW_SECONDS})
token = et.generate_acl_token("/akamai/edgeauth/list/*")
url = "http://{0}{1}".format(ET_HOSTNAME, "/akamai/edgeauth/list/something")
response = requests.get(url, headers={et.token_name: token})
print(response)

# 2) Cookie Delimited by '!'
acl_path = ["/akamai/edgeauth", "/akamai/edgeauth/list/*"]
token = et.generate_acl_token(acl_path)
# url = "http://{0}{1}".format(ET_HOSTNAME, "/akamai/edgeauth")
url = "http://{0}{1}".format(ET_HOSTNAME, "/akamai/edgeauth/list/something2")
response = requests.get(url, cookies={et.token_name: token})
print(response)

• ACL can use the wildcard(*, ?) in the path.
• Don't use '!' in your path because it's ACL Delimiter.
• Use 'escape_early=False' as default setting but it doesn't matter turning on/off 'Escape token input' option in the Property Manager

Usage

EdgeAuth Class

class EdgeAuth(token_type=None, token_name='__token__', key=None, algorithm='sha256',
               salt=None, ip=None, payload=None, session_id=None,
               start_time=None, end_time=None, window_seconds=None,
               field_delimiter='~', acl_delimiter='!', escape_early=False, verbose=False)

Parameter	Description
token_type	Select a preset. (Not Supported Yet)
token_name	Parameter name for the new token. [Default: '__token__']
key	Secret required to generate the token. It must be hexadecimal digit string with even-length.
algorithm	Algorithm to use to generate the token. ('sha1', 'sha256', or 'md5') [Default: 'sha256']
salt	Additional data validated by the token but NOT included in the token body. (It will be deprecated)
ip	IP Address to restrict this token to. (Troublesome in many cases (roaming, NAT, etc) so not often used)
payload	Additional text added to the calculated digest.
session_id	The session identifier for single use tokens or other advanced cases.
start_time	What is the start time? (Use string 'now' for the current time)
end_time	When does this token expire? end_time overrides window_seconds
window_seconds	How long is this token valid for?
field_delimiter	Character used to delimit token body fields. [Default: ~]
acl_delimiter	Character used to delimit acl. [ Default: ! ]
escape_early	Causes strings to be 'url' encoded before being used.
verbose	Print all parameters.

EdgeAuth's Method

def generate_url_token(url)
def generate_acl_token(acl)

# Returns the authorization token string.

Parameter	Description
url	Single URL path (String)
acl	Access Control List can use the wildcard(*, ?). It can be String (single path) or Array (multi paths)

Test

"/test" directory is only for the internal test.

Others

If you use the Segmented Media Protection behavior in AMD(Adaptive Media Delivery) Product, token_name should be 'hdnts'.

Command

$ python cms_edgeauth.py -k YourEncryptionKey -w 5000 -u /hello/world -x

Use -h or --help option for the detail.