def generate_signature()

in ec2stack/helpers.py [0:0]

• 17 lines of code
• 3 McCabe index (conditional complexity)

def generate_signature(data=None, method=None, host=None, path=None):
    """
    Generates a signature.

    @param data: Data of the request.
    @param method: HTTP method used.
    @param host: HTTP post.
    @param path: HTTP hort.
    @return: A signature.
    """
    if data is None:
        data = request.form

    signature_type = get('SignatureMethod', data)

    secretkey = get_secretkey(data)
    request_string = _get_request_string(data, method, host, path)

    if signature_type == 'HmacSHA1':
        digestmod = hashlib.sha1
    else:
        digestmod = hashlib.sha256

    signature = hmac.new(
        key=secretkey,
        msg=bytes(request_string),
        digestmod=digestmod
    ).digest()

    signature = b64encode(signature)

    return signature