Support chained IndexReader wrappers for extensible custom features like Field Masking #130982
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💚 CLA has been signed |
elasticsearchmachine
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ttfcfc
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…ity, Document-Level Security, and custom features like Field Masking
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PeteGillinElastic
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:Security/Security
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Pinging @elastic/es-security (Team:Security) |
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This pull request introduces a flexible mechanism to chain multiple IndexReader wrappers inside Elasticsearch's security plugin. This allows custom extensions—such as field-level data masking (field desensitization)—to be implemented cleanly at the Lucene layer.
Elasticsearch natively supports FLS and DLS by wrapping Lucene DirectoryReader instances to filter unauthorized fields and documents per user roles. However, existing implementations have limited extensibility for other security-related features like field masking.
Adds a method to chain multiple CheckedFunction<DirectoryReader, DirectoryReader, IOException> wrappers that can be applied sequentially to the index reader.
Integrates this chaining mechanism into the security plugin’s index reader wrapping flow.
Provides a public API for SecurityExtension implementations to contribute custom reader wrappers, allowing third-party plugins to implement additional security or masking logic at the Lucene layer.
Ensures compatibility with existing DLS and FLS implementations.