feat(pam): NTLM authentication for MSSQL proxy#241
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Gateway MSSQL proxy now supports NTLM (Windows Authentication) in addition to SQL auth. When AuthMethod is "ntlm", the proxy performs a 3-message NTLM handshake with the server (negotiate, challenge, authenticate) using go-ntlmssp, instead of sending SQL credentials in LOGIN7. The client-to-gateway leg is unchanged — clients always use SQL auth with dummy credentials, and the proxy injects the real NTLM auth on the server leg.
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💬 Discussion in Slack: #pr-review-cli-241-feat-pam-ntlm-authentication-for-mssql-proxy Posted by Review Police — reviews, comments, new commits, and CI failures will stream into this channel. |
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…x SSPI length sentinel Extract SSPI token before checking for error tokens — the NTLM challenge contains random binary that can match the 0xAA error byte. Also fix the SSPI length boundary: 0xFFFF is a sentinel per TDS spec, so use strict less-than.
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@claude review once |
go-ntlmssp uses splitNameForAuth to extract domain from the username. Without the DOMAIN\ prefix, the domain is empty in the NTLMv2 hash and authenticate message, which may fail on domain-member SQL Servers authenticating against a remote DC.
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Description 📣
Gateway MSSQL proxy can now perform NTLM authentication with the target SQL Server when the account is configured for Windows auth. Uses go-ntlmssp for the handshake; the client-to-gateway leg remains unchanged.
Infisical/infisical#6544
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Tests 🛠️
# Here's some code block to paste some code snippets