def validate_callback(self, service, pgturl, pgtid, pgtiou):
"""Verify the provided proxy callback URL."""
if not proxy_allowed(service):
raise UnauthorizedServiceProxy("%s is not authorized to use proxy authentication" % service)
if not is_scheme_https(pgturl):
raise InvalidProxyCallback("Proxy callback %s is not HTTPS" % pgturl)
if not proxy_callback_allowed(service, pgturl):
raise InvalidProxyCallback("%s is not an authorized proxy callback URL" % pgturl)
# Verify that the SSL certificate is valid
verify = os.environ.get('REQUESTS_CA_BUNDLE', True)
try:
requests.get(pgturl, verify=verify, timeout=5)
except requests.exceptions.SSLError:
raise InvalidProxyCallback("SSL certificate validation failed for proxy callback %s" % pgturl)
except requests.exceptions.RequestException as e:
raise InvalidProxyCallback(e)
# Callback certificate appears valid, so send the ticket strings
pgturl = add_query_params(pgturl, {'pgtId': pgtid, 'pgtIou': pgtiou})
try:
response = requests.get(pgturl, verify=verify, timeout=5)
except requests.exceptions.RequestException as e:
raise InvalidProxyCallback(e)
try:
response.raise_for_status()
except requests.exceptions.HTTPError as e:
raise InvalidProxyCallback("Proxy callback %s returned %s" % (pgturl, e))
def validate_callback(self, url, pgtid, pgtiou):
"""
Verify the provided proxy callback URL. This verification process
requires three steps:
1. The URL scheme must be HTTPS
2. The SSL certificate must be valid and its name must match that
of the service
3. The callback URL must respond with a 200 or 3xx response code
It is not required for validation that 3xx redirects be followed.
"""
# Ensure the scheme is HTTPS before proceeding
if not is_scheme_https(url):
raise InvalidProxyCallback("Proxy callback %s is not HTTPS" % url)
# Connect to proxy callback URL, checking the SSL certificate
url_params = add_query_params(url, {'pgtId': pgtid, 'pgtIou': pgtiou})
verify = os.environ.get('REQUESTS_CA_BUNDLE', True)
try:
r = requests.get(url_params, verify=verify, timeout=3.0)
except requests.exceptions.SSLError:
msg = "SSL cert validation failed for proxy callback %s" % url
raise InvalidProxyCallback(msg)
except requests.exceptions.ConnectionError:
msg = "Error connecting to proxy callback %s" % url
raise InvalidProxyCallback(msg)
except requests.exceptions.Timeout:
msg = "Timeout connecting to proxy callback %s" % url
raise InvalidProxyCallback(msg)
# Check the returned HTTP status code
try:
r.raise_for_status()
except requests.exceptions.HTTPError as e:
msg = "Proxy callback %s returned %s" % (url, e)
raise InvalidProxyCallback(msg)
def validate_callback(self, service, pgturl, pgtid, pgtiou):
"""Verify the provided proxy callback URL."""
if not can_proxy_authentication(service):
raise UnauthorizedServiceProxy(
"%s is not authorized to use proxy authentication" % service)
if not is_scheme_https(pgturl):
raise InvalidProxyCallback("Proxy callback %s is not HTTPS" %
pgturl)
if not is_valid_proxy_callback(service, pgturl):
raise InvalidProxyCallback(
"%s is not an authorized proxy callback URL" % pgturl)
# Check the proxy callback URL and SSL certificate
pgturl_params = add_query_params(pgturl, {
'pgtId': pgtid,
'pgtIou': pgtiou
})
verify = os.environ.get('REQUESTS_CA_BUNDLE', True)
try:
r = requests.get(pgturl_params, verify=verify, timeout=3.0)
except requests.exceptions.SSLError:
msg = "SSL cert validation failed for proxy callback %s" % pgturl
raise InvalidProxyCallback(msg)
except requests.exceptions.ConnectionError:
msg = "Error connecting to proxy callback %s" % pgturl
raise InvalidProxyCallback(msg)
except requests.exceptions.Timeout:
msg = "Timeout connecting to proxy callback %s" % pgturl
raise InvalidProxyCallback(msg)
# Check the returned HTTP status code
try:
r.raise_for_status()
except requests.exceptions.HTTPError as e:
msg = "Proxy callback %s returned %s" % (pgturl, e)
raise InvalidProxyCallback(msg)