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HTTP Basic: opt-in UTF-8 credentials (RFC 7617), read token68 challenges - #1616
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- New opt-in, disabled by default: with the system property org.restlet.engine.security.basic.utf8=true a Basic challenge advertises charset="UTF-8", a server decodes the credentials as UTF-8 (falling back to ISO-8859-1) and a client answering such a challenge encodes UTF-8. Issue #1455. - A WWW-Authenticate challenge made of a token68 ending with "=" (Negotiate) was dropped with the whole header. Issue #191. Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
RFC 9110 section 11.2 makes auth-param names case-insensitive. "Realm=" was ignored (null realm) and "Charset=" was not seen by the client. Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Another test of the suite can leave a Restlet engine without the Basic authenticator helper (seen on CI, depending on the test order): the new tests now register a complete engine first. Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
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The aim
Fixes #1455. Fixes #191.
charset="UTF-8"only if set by hand, so UTF-8 logins and passwords cannot work (RFC 7617 section 2.1).WWW-Authenticate: Negotiate <base64>==, Basic realm="a": the=padding of a token68 (RFC 9110 section 11.2) made the reader throw, and the whole header was dropped.The solution
Opt-in, disabled by default (no behavior change): with the system property
org.restlet.engine.security.basic.utf8=true(HttpBasicHelper.UTF8_PROPERTY):ChallengeAuthenticatoradvertisescharset="UTF-8";ChallengeResponsebuilt from a challenge request copies itscharset, so the client encodes UTF-8.Bug fixes:
ChallengeRequestReaderreads a token68 ending with=.realmandcharsetparameters of a Basic challenge are matched case-insensitively (RFC 9110 section 11.2);Realm=used to give a null realm.3.0 makes the UTF-8 behavior the default. Credentials are read at header parse time, before the authenticator is known, hence a global switch.
Reproduction
ChallengeRequestReader("Negotiate YIIabc==, Basic realm=\"a\"").readValues()is empty before the fix. For Basic: start the JVM with-Dorg.restlet.engine.security.basic.utf8=trueand call with loginzoë/ passwordp€ss.Check-list
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