Skip to content

Fix proxy SPNego authentication to respect krb5.conf canonicalization settings. #541

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 2 commits into from
Nov 3, 2025
Merged

Fix proxy SPNego authentication to respect krb5.conf canonicalization settings. #541

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
d5918c1
Fix proxy canonical override
renaudhartert-db Oct 31, 2025
41a619b
Merge branch 'main' into renaud-hartert_data/proxy
renaudhartert-db Oct 31, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 2 additions & 0 deletions NEXT_CHANGELOG.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,8 @@

### Bug Fixes

* Fix proxy SPNego authentication to respect krb5.conf canonicalization settings instead of forcing hostname canonicalization. The SDK now defers to the Kerberos library configuration for hostname resolution. **Migration note**: If you experience new Kerberos authentication failures with proxy servers after upgrading, verify that your `krb5.conf` canonicalization settings (`rdns` and `dns_canonicalize_hostname`) are correctly configured for your environment.

### Security Vulnerabilities

### Documentation
Expand Down
5 changes: 4 additions & 1 deletion databricks-sdk-java/src/main/java/com/databricks/sdk/core/utils/ProxyUtils.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -128,7 +128,10 @@ public Principal getUserPrincipal() {
.setDefaultCredentialsProvider(credsProvider)
.setDefaultAuthSchemeRegistry(
RegistryBuilder.<AuthSchemeProvider>create()
.register(AuthSchemes.SPNEGO, new SPNegoSchemeFactory(true))
// Use SPNegoSchemeFactory with useCanonicalHostname=false to defer hostname
// canonicalization to the Kerberos library based on krb5.conf settings
// (rdns, dns_canonicalize_hostname) rather than forcing canonicalization.
.register(AuthSchemes.SPNEGO, new SPNegoSchemeFactory(true, false))
.build());
}

Expand Down
Loading