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https://issues.apache.org/jira/browse/CALCITE-7796?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated CALCITE-7796:
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Labels: pull-request-available (was: )
> Avatica: `hostname_verification=NONE` has no effect with Apache HttpClient
> 5.6+
> -------------------------------------------------------------------------------
>
> Key: CALCITE-7796
> URL: https://issues.apache.org/jira/browse/CALCITE-7796
> Project: Calcite
> Issue Type: Bug
> Components: avatica
> Affects Versions: avatica-1.28
> Reporter: Andreas Maechler
> Priority: Major
> Labels: pull-request-available
>
> With {{hostname_verification=NONE,}} the remote driver is supposed to skip
> TLS hostname verification. However, on Apache HttpClient >= 5.6 it doesn't
> anymore and we start seeing hostname verification failures again. Avatica
> 1.28.0 itself depends on HttpClient 5.5, where this still works, so the bug
> surfaces as soon as a consumer resolves HttpClient 5.6 through another
> dependency (in our case, a Quarkus BOM would pin 5.6.x since Quarkus 3.38).
> ---
> {{CommonsHttpClientPoolCache.createTlsSocketStrategy}} builds the TLS
> strategy as
> {code:java}
> new DefaultClientTlsStrategy(getSSLContext(config),
> getHostnameVerifier(config.hostnameVerification()));
> {code}
> and relies on the default {{HostnameVerificationPolicy}} (added in HttpClient
> 5.4 with the values {{{}CLIENT{}}}, {{BUILTIN}} and {{{}BOTH{}}}). The
> {{HostnameVerifier}} only controls HttpClient's own check after the
> handshake; whether the JSSE endpoint identification runs during the handshake
> is decided by the policy alone. Up to HttpClient 5.5 the two-argument
> constructor used {{{}CLIENT{}}}, so {{NoopHostnameVerifier}} was the only
> check. Since 5.6 ([this
> PR|https://github.com/apache/httpcomponents-client/pull/649]), the
> constructor passes no policy, and\{{ AbstractClientTlsStrategy}} resolves the
> default as {{BOTH}} when a verifier is supplied and {{BUILTIN}} when none is.
> Both delegate hostname verification to the JSSE provider by calling
> {{{}SSLParameters.setEndpointIdentificationAlgorithm("HTTPS"){}}}, so the
> check runs during the TLS handshake and fails it before the verifier is ever
> consulted. {{NONE}} therefore no longer disables anything.
>
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