Stuart Douglas created WFLY-9136: ------------------------------------ Summary: Undertow is doubly URLDecoder.decode(ing) auth-method query parameters Key: WFLY-9136 URL: https://issues.jboss.org/browse/WFLY-9136 Project: WildFly Issue Type: Bug Components: Web (Undertow) Affects Versions: 10.1.0.Final Reporter: Scott Stark Assignee: Stuart Douglas I'm testing a custom authentication mechanism that is passing in a PEM encoded public key that has been URL.encoded. I have attached the web.xml I'm using, but I have also created a simple standalone unit test that illustrates the issue. The org.wildfly.extension.undertow.deployment.AuthMethodParser.parse method calls io.undertow.util.QueryParameterUtils.parseQueryString to handle the parsing of the query string passed in with the auth-method name. This detects if there is a need to decode a parameter and does so. The resulting map of query properties is then again unconditionally decodes the values again by this loop in AuthMethodParser: {code:java} for (Map.Entry<String, Deque<String>> entry : props.entrySet()) { Deque<String> val = entry.getValue(); if (val.isEmpty()) { authMethodConfig.getProperties().put(URLDecoder.decode(entry.getKey(), UTF_8), ""); } else { authMethodConfig.getProperties().put(URLDecoder.decode(entry.getKey(), UTF_8), URLDecoder.decode(val.getFirst(), UTF_8)); } } {code} since the original value is a PEM encoded public key, it may contains '+' characters, and these then are incorrectly transformed into space characters. I would suggest that this second decoding step simply be dropped. -- This message was sent by Atlassian JIRA (v7.2.3#72005)