Mirror/seaweedfs - seaweedfs - Gitea: Git with a cup of tea

Author	SHA1	Message	Date
Chris Lu	ee3813787e	feat(s3api): Implement S3 Policy Variables (#8039 ) * feat: Add AWS IAM Policy Variables support to S3 API Implements policy variables for dynamic access control in bucket policies. Supported variables: - aws:username - Extracted from principal ARN - aws:userid - User identifier (same as username in SeaweedFS) - aws:principaltype - IAMUser, IAMRole, or AssumedRole - jwt:* - Any JWT claim (e.g., jwt:preferred_username, jwt:sub) Key changes: - Added PolicyVariableRegex to detect ${...} patterns - Extended CompiledStatement with DynamicResourcePatterns, DynamicPrincipalPatterns, DynamicActionPatterns - Added Claims field to PolicyEvaluationArgs for JWT claim access - Implemented SubstituteVariables() for variable replacement from context and JWT claims - Implemented extractPrincipalVariables() for ARN parsing - Updated EvaluateConditions() to support variable substitution - Comprehensive unit and integration tests Resolves #8037 * feat: Add LDAP and PrincipalAccount variable support Completes future enhancements for policy variables: - Added ldap:* variable support for LDAP claims - ldap:username - LDAP username from claims - ldap:dn - LDAP distinguished name from claims - ldap:* - Any LDAP claim - Added aws:PrincipalAccount extraction from ARN - Extracts account ID from principal ARN - Available as ${aws:PrincipalAccount} in policies Updated SubstituteVariables() to check LDAP claims Updated extractPrincipalVariables() to extract account ID Added comprehensive tests for new variables * feat(s3api): implement IAM policy variables core logic and optimization * feat(s3api): integrate policy variables with S3 authentication and handlers * test(s3api): add integration tests for policy variables * cleanup: remove unused policy conversion files * Add S3 policy variables integration tests and path support - Add comprehensive integration tests for policy variables - Test username isolation, JWT claims, LDAP claims - Add support for IAM paths in principal ARN parsing - Add tests for principals with paths * Fix IAM Role principal variable extraction IAM Roles should not have aws:userid or aws:PrincipalAccount according to AWS behavior. Only IAM Users and Assumed Roles should have these variables. Fixes TestExtractPrincipalVariables test failures. * Security fixes and bug fixes for S3 policy variables SECURITY FIXES: - Prevent X-SeaweedFS-Principal header spoofing by clearing internal headers at start of authentication (auth_credentials.go) - Restrict policy variable substitution to safe allowlist to prevent client header injection (iam/policy/policy_engine.go) - Add core policy validation before storing bucket policies BUG FIXES: - Remove unused sid variable in evaluateStatement - Fix LDAP claim lookup to check both prefixed and unprefixed keys - Add ValidatePolicy call in PutBucketPolicyHandler These fixes prevent privilege escalation via header injection and ensure only validated identity claims are used in policy evaluation. * Additional security fixes and code cleanup SECURITY FIXES: - Fixed X-Forwarded-For spoofing by only trusting proxy headers from private/localhost IPs (s3_iam_middleware.go) - Changed context key from "sourceIP" to "aws:SourceIp" for proper policy variable substitution CODE IMPROVEMENTS: - Kept aws:PrincipalAccount for IAM Roles to support condition evaluations - Removed redundant STS principaltype override - Removed unused service variable - Cleaned up commented-out debug logging statements - Updated tests to reflect new IAM Role behavior These changes prevent IP spoofing attacks and ensure policy variables work correctly with the safe allowlist. * Add security documentation for ParseJWTToken Added comprehensive security comments explaining that ParseJWTToken is safe despite parsing without verification because: - It's only used for routing to the correct verification method - All code paths perform cryptographic verification before trusting claims - OIDC tokens: validated via validateExternalOIDCToken - STS tokens: validated via ValidateSessionToken Enhanced function documentation with clear security warnings about proper usage to prevent future misuse. * Fix IP condition evaluation to use aws:SourceIp key Fixed evaluateIPCondition in IAM policy engine to use "aws:SourceIp" instead of "sourceIP" to match the updated extractRequestContext. This fixes the failing IP-restricted role test where IP-based policy conditions were not being evaluated correctly. Updated all test cases to use the correct "aws:SourceIp" key. * Address code review feedback: optimize and clarify PERFORMANCE IMPROVEMENT: - Optimized expandPolicyVariables to use regexp.ReplaceAllStringFunc for single-pass variable substitution instead of iterating through all safe variables. This improves performance from O(nm) to O(m) where n is the number of safe variables and m is the pattern length. CODE CLARITY: - Added detailed comment explaining LDAP claim fallback mechanism (checks both prefixed and unprefixed keys for compatibility) - Enhanced TODO comment for trusted proxy configuration with rationale and recommendations for supporting cloud load balancers, CDNs, and complex network topologies All tests passing. Address Copilot code review feedback BUG FIXES: - Fixed type switch for int/int32/int64 - separated into individual cases since interface type switches only match the first type in multi-type cases - Fixed grammatically incorrect error message in types.go CODE QUALITY: - Removed duplicate Resource/NotResource validation (already in ValidateStatement) - Added comprehensive comment explaining isEnabled() logic and security implications - Improved trusted proxy NOTE comment to be more concise while noting limitations All tests passing. * Fix test failures after extractSourceIP security changes Updated tests to work with the security fix that only trusts X-Forwarded-For/X-Real-IP headers from private IP addresses: - Set RemoteAddr to 127.0.0.1 in tests to simulate trusted proxy - Changed context key from "sourceIP" to "aws:SourceIp" - Added test case for untrusted proxy (public RemoteAddr) - Removed invalid ValidateStatement call (validation happens in ValidatePolicy) All tests now passing. * Address remaining Gemini code review feedback CODE SAFETY: - Deep clone Action field in CompileStatement to prevent potential data races if the original policy document is modified after compilation TEST CLEANUP: - Remove debug logging (fmt.Fprintf) from engine_notresource_test.go - Remove unused imports in engine_notresource_test.go All tests passing. * Fix insecure JWT parsing in IAM auth flow SECURITY FIX: - Renamed ParseJWTToken to ParseUnverifiedJWTToken with explicit security warnings. - Refactored AuthenticateJWT to use the trusted SessionInfo returned by ValidateSessionToken instead of relying on unverified claims from the initial parse. - Refactored ValidatePresignedURLWithIAM to reuse the robust AuthenticateJWT logic, removing duplicated and insecure manual token parsing. This ensures all identity information (Role, Principal, Subject) used for authorization decisions is derived solely from cryptographically verified tokens. * Security: Fix insecure JWT claim extraction in policy engine - Refactored EvaluatePolicy to accept trusted claims from verified Identity instead of parsing unverified tokens - Updated AuthenticateJWT to populate Claims in IAMIdentity from verified sources (SessionInfo/ExternalIdentity) - Updated s3api_server and handlers to pass claims correctly - Improved isPrivateIP to support IPv6 loopback, link-local, and ULA - Fixed flaky distributed_session_consistency test with retry logic * fix(iam): populate Subject in STSSessionInfo to ensure correct identity propagation This fixes the TestS3IAMAuthentication/valid_jwt_token_authentication failure by ensuring the session subject (sub) is correctly mapped to the internal SessionInfo struct, allowing bucket ownership validation to succeed. * Optimized isPrivateIP * Create s3-policy-tests.yml * fix tests * fix tests * tests(s3/iam): simplify policy to resource-based \ (step 1) * tests(s3/iam): add explicit Deny NotResource for isolation (step 2) * fixes * policy: skip resource matching for STS trust policies to allow AssumeRole evaluation * refactor: remove debug logging and hoist policy variables for performance * test: fix TestS3IAMBucketPolicyIntegration cleanup to handle per-subtest object lifecycle * test: fix bucket name generation to comply with S3 63-char limit * test: skip TestS3IAMPolicyEnforcement until role setup is implemented * test: use weed mini for simpler test server deployment Replace 'weed server' with 'weed mini' for IAM tests to avoid port binding issues and simplify the all-in-one server deployment. This improves test reliability and execution time. * security: prevent allocation overflow in policy evaluation Add maxPoliciesForEvaluation constant to cap the number of policies evaluated in a single request. This prevents potential integer overflow when allocating slices for policy lists that may be influenced by untrusted input. Changes: - Add const maxPoliciesForEvaluation = 1024 to set an upper bound - Validate len(policies) < maxPoliciesForEvaluation before appending bucket policy - Use append() instead of make([]string, len+1) to avoid arithmetic overflow - Apply fix to both IsActionAllowed policy evaluation paths	3 weeks ago
Chris Lu	d6d893c8c3	s3: add s3:ExistingObjectTag condition support for bucket policies (#7677 ) * s3: add s3:ExistingObjectTag condition support in policy engine Add support for s3:ExistingObjectTag/<tag-key> condition keys in bucket policies, allowing access control based on object tags. Changes: - Add ObjectEntry field to PolicyEvaluationArgs (entry.Extended metadata) - Update EvaluateConditions to handle s3:ExistingObjectTag/<key> format - Extract tag value from entry metadata using X-Amz-Tagging-<key> prefix This enables policies like: { "Condition": { "StringEquals": { "s3:ExistingObjectTag/status": ["public"] } } } Fixes: https://github.com/seaweedfs/seaweedfs/issues/7447 * s3: update EvaluatePolicy to accept object entry for tag conditions Update BucketPolicyEngine.EvaluatePolicy to accept objectEntry parameter (entry.Extended metadata) for evaluating tag-based policy conditions. Changes: - Add objectEntry parameter to EvaluatePolicy method - Update callers in auth_credentials.go and s3api_bucket_handlers.go - Pass nil for objectEntry in auth layer (entry fetched later in handlers) For tag-based conditions to work, handlers should call EvaluatePolicy with the object's entry.Extended after fetching the entry from filer. * s3: add tests for s3:ExistingObjectTag policy conditions Add comprehensive tests for object tag-based policy conditions: - TestExistingObjectTagCondition: Basic tag matching scenarios - Matching/non-matching tag values - Missing tags, no tags, empty tags - Multiple tags with one matching - TestExistingObjectTagConditionMultipleTags: Multiple tag conditions - Both tags match - Only one tag matches - TestExistingObjectTagDenyPolicy: Deny policies with tag conditions - Default allow without tag - Deny when specific tag present * s3: document s3:ExistingObjectTag support and feature status Update policy engine documentation: - Add s3:ExistingObjectTag/<tag-key> to supported condition keys - Add 'Object Tag-Based Access Control' section with examples - Add 'Feature Status' section with implemented and planned features Planned features for future implementation: - s3:RequestObjectTag/<key> - s3:RequestObjectTagKeys - s3:x-amz-server-side-encryption - Cross-account access * Implement tag-based policy re-check in handlers - Add checkPolicyWithEntry helper to S3ApiServer for handlers to re-check policy after fetching object entry (for s3:ExistingObjectTag conditions) - Add HasPolicyForBucket method to policy engine for efficient check - Integrate policy re-check in GetObjectHandler after entry is fetched - Integrate policy re-check in HeadObjectHandler after entry is fetched - Update auth_credentials.go comments to explain two-phase evaluation - Update documentation with supported operations for tag-based conditions This implements 'Approach 1' where handlers re-check the policy with the object entry after fetching it, allowing tag-based conditions to be properly evaluated. * Add integration tests for s3:ExistingObjectTag conditions - Add TestCheckPolicyWithEntry: tests checkPolicyWithEntry helper with various tag scenarios (matching tags, non-matching tags, empty entry, nil entry) - Add TestCheckPolicyWithEntryNoPolicyForBucket: tests early return when no policy - Add TestCheckPolicyWithEntryNilPolicyEngine: tests nil engine handling - Add TestCheckPolicyWithEntryDenyPolicy: tests deny policies with tag conditions - Add TestHasPolicyForBucket: tests HasPolicyForBucket method These tests cover the Phase 2 policy evaluation with object entry metadata, ensuring tag-based conditions are properly evaluated. * Address code review nitpicks - Remove unused extractObjectTags placeholder function (engine.go) - Add clarifying comment about s3:ExistingObjectTag/<key> evaluation - Consolidate duplicate tag-based examples in README - Factor out tagsToEntry helper to package level in tests * Address code review feedback - Fix unsafe type assertions in GetObjectHandler and HeadObjectHandler when getting identity from context (properly handle type assertion failure) - Extract getConditionContextValue helper to eliminate duplicated logic between EvaluateConditions and EvaluateConditionsLegacy - Ensure consistent handling of missing condition keys (always return empty slice) * Fix GetObjectHandler to match HeadObjectHandler pattern Add safety check for nil objectEntryForSSE before tag-based policy evaluation, ensuring tag-based conditions are always evaluated rather than silently skipped if entry is unexpectedly nil. Addresses review comment from Copilot. * Fix HeadObject action name in docs for consistency Change 'HeadObject' to 's3:HeadObject' to match other action names. * Extract recheckPolicyWithObjectEntry helper to reduce duplication Move the repeated identity extraction and policy re-check logic from GetObjectHandler and HeadObjectHandler into a shared helper method. * Add validation for empty tag key in s3:ExistingObjectTag condition Prevent potential issues with malformed policies containing s3:ExistingObjectTag/ (empty tag key after slash).	2 months ago
Chris Lu	508d06d9a5	S3: Enforce bucket policy (#7471 ) * evaluate policies during authorization * cache bucket policy * refactor * matching with regex special characters * Case Sensitivity, pattern cache, Dead Code Removal * Fixed Typo, Restored []string Case, Added Cache Size Limit * hook up with policy engine * remove old implementation * action mapping * validate * if not specified, fall through to IAM checks * fmt * Fail-close on policy evaluation errors * Explicit `Allow` bypasses IAM checks * fix error message * arn:seaweed => arn:aws * remove legacy support * fix tests * Clean up bucket policy after this test * fix for tests * address comments * security fixes * fix tests * temp comment out	3 months ago
Chris Lu	69553e5ba6	convert error fromating to %w everywhere (#6995 )	7 months ago
Chris Lu	7cb1ca1308	Add policy engine (#6970 )	7 months ago