Use managed NTLM on RHEL 8 to fix NegotiateAuthentication test failures#129468
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Use managed NTLM on RHEL 8 to fix NegotiateAuthentication test failures#129468medhatiwari wants to merge 1 commit into
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Summary
RHEL 8 ships
gss-ntlmssp 1.2.0built against OpenSSL 1.1.1. Unlike RHEL 9/10 (which use OpenSSL 3.x), this combination causes gssntlmssp to fail when producing NTLM Type 3 (Authenticate) messages,GetOutgoingBlobreturnsGenericFailurewhen processing a server challenge.This is the same class of issue already handled for Ubuntu 24/26 and openSUSE 16 (which ship a broken
gss-ntlmssp 1.2). The fix adds RHEL 8 to theUseManagedNtlmcondition usingPlatformDetection.IsRedHatFamily && !PlatformDetection.IsOpenSsl3, which enables the managed NTLM implementation only on RHEL versions with OpenSSL < 3 (i.e., RHEL 8). RHEL 9 and 10 (OpenSSL 3.x) are unaffected.Verification
Tested on a RHEL 8.10 s390x machine (
gssntlmssp-1.2.0-1.el8_8, OpenSSL 1.1.1k):GenericFailure— gssntlmssp cannot produce an Authenticate message.DOTNET_System_Net_Security_UseManagedNtlm=1): Full NTLM handshake completes successfully — valid Type 3 message (356 bytes,status=Completed).This resolves 11 NegotiateAuthentication test failures seen in CI on RHEL 8.