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Merge pull request #7067 from matrix-org/babolivier/saml_error_moar

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Move the default SAML2 error HTML to a dedicated file
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Brendan Abolivier 2020-03-13 19:53:19 +00:00 committed by GitHub
commit d8d91983bc
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4 changed files with 90 additions and 28 deletions
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1
changelog.d/7067.feature Normal file
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@ -0,0 +1 @@
Render a configurable and comprehensible error page if something goes wrong during the SAML2 authentication process.

22
docs/sample_config.yaml
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@ -1360,12 +1360,24 @@ saml2_config:
# #
#grandfathered_mxid_source_attribute: upn #grandfathered_mxid_source_attribute: upn
# Path to a file containing HTML content to serve in case an error happens # Directory in which Synapse will try to find the template files below.
# when the user gets redirected from the SAML IdP back to Synapse. # If not set, default templates from within the Synapse package will be used.
# If no file is provided, this defaults to some minimalistic HTML telling the
# user that something went wrong and they should try authenticating again.
# #
#error_html_path: /path/to/static/content/saml_error.html # DO NOT UNCOMMENT THIS SETTING unless you want to customise the templates.
# If you *do* uncomment it, you will need to make sure that all the templates
# below are in the directory.
#
# Synapse will look for the following templates in this directory:
#
# * HTML page to display to users if something goes wrong during the
# authentication process: 'saml_error.html'.
#
# This template doesn't currently need any variable to render.
#
# You can see the default templates at:
# https://github.com/matrix-org/synapse/tree/master/synapse/res/templates
#
#template_dir: "res/templates"

46
synapse/config/saml2_config.py
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@ -15,6 +15,9 @@
# limitations under the License. # limitations under the License.
import logging import logging
import os
import pkg_resources
from synapse.python_dependencies import DependencyException, check_requirements from synapse.python_dependencies import DependencyException, check_requirements
from synapse.util.module_loader import load_module, load_python_module from synapse.util.module_loader import load_module, load_python_module
@ -27,18 +30,6 @@ DEFAULT_USER_MAPPING_PROVIDER = (
"synapse.handlers.saml_handler.DefaultSamlMappingProvider" "synapse.handlers.saml_handler.DefaultSamlMappingProvider"
) )
SAML2_ERROR_DEFAULT_HTML = """
<html>
<body>
<p>Oops! Something went wrong</p>
<p>
Try logging in again from your Matrix client and if the problem persists
please contact the server's administrator.
</p>
</body>
</html>
"""
def _dict_merge(merge_dict, into_dict): def _dict_merge(merge_dict, into_dict):
"""Do a deep merge of two dicts """Do a deep merge of two dicts
@ -172,12 +163,13 @@ class SAML2Config(Config):
saml2_config.get("saml_session_lifetime", "5m") saml2_config.get("saml_session_lifetime", "5m")
) )
if "error_html_path" in config: template_dir = saml2_config.get("template_dir")
if not template_dir:
template_dir = pkg_resources.resource_filename("synapse", "res/templates",)
self.saml2_error_html_content = self.read_file( self.saml2_error_html_content = self.read_file(
config["error_html_path"], "saml2_config.error_html_path", os.path.join(template_dir, "saml_error.html"), "saml2_config.saml_error",
) )
else:
self.saml2_error_html_content = SAML2_ERROR_DEFAULT_HTML
def _default_saml_config_dict( def _default_saml_config_dict(
self, required_attributes: set, optional_attributes: set self, required_attributes: set, optional_attributes: set
@ -345,12 +337,24 @@ class SAML2Config(Config):
# #
#grandfathered_mxid_source_attribute: upn #grandfathered_mxid_source_attribute: upn
# Path to a file containing HTML content to serve in case an error happens # Directory in which Synapse will try to find the template files below.
# when the user gets redirected from the SAML IdP back to Synapse. # If not set, default templates from within the Synapse package will be used.
# If no file is provided, this defaults to some minimalistic HTML telling the
# user that something went wrong and they should try authenticating again.
# #
#error_html_path: /path/to/static/content/saml_error.html # DO NOT UNCOMMENT THIS SETTING unless you want to customise the templates.
# If you *do* uncomment it, you will need to make sure that all the templates
# below are in the directory.
#
# Synapse will look for the following templates in this directory:
#
# * HTML page to display to users if something goes wrong during the
# authentication process: 'saml_error.html'.
#
# This template doesn't currently need any variable to render.
#
# You can see the default templates at:
# https://github.com/matrix-org/synapse/tree/master/synapse/res/templates
#
#template_dir: "res/templates"
""" % { """ % {
"config_dir_path": config_dir_path "config_dir_path": config_dir_path
} }

45
synapse/res/templates/saml_error.html Normal file
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@ -0,0 +1,45 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>SSO error</title>
</head>
<body>
<p>Oops! Something went wrong during authentication<span id="errormsg"></span>.</p>
<p>
If you are seeing this page after clicking a link sent to you via email, make
sure you only click the confirmation link once, and that you open the
validation link in the same client you're logging in from.
</p>
<p>
Try logging in again from your Matrix client and if the problem persists
please contact the server's administrator.
</p>
<script type="text/javascript">
// Error handling to support Auth0 errors that we might get through a GET request
// to the validation endpoint. If an error is provided, it's either going to be
// located in the query string or in a query string-like URI fragment.
// We try to locate the error from any of these two locations, but if we can't
// we just don't print anything specific.
let searchStr = "";
if (window.location.search) {
// window.location.searchParams isn't always defined when
// window.location.search is, so it's more reliable to parse the latter.
searchStr = window.location.search;
} else if (window.location.hash) {
// Replace the # with a ? so that URLSearchParams does the right thing and
// doesn't parse the first parameter incorrectly.
searchStr = window.location.hash.replace("#", "?");
}
// We might end up with no error in the URL, so we need to check if we have one
// to print one.
let errorDesc = new URLSearchParams(searchStr).get("error_description")
if (errorDesc) {
document.getElementById("errormsg").innerText = ` ("${errorDesc}")`;
}
</script>
</body>
</html>