2 commits

Author	SHA1	Message	Date
Jeremie Fraeys	58c1a5fa58	feat(audit): Tamper-evident audit chain verification system ... Add ChainVerifier for cryptographic audit log verification: - VerifyLogFile(): Validates entire audit chain integrity - Detects tampering at specific event index (FirstTampered) - Returns chain root hash for external verification - GetChainRootHash(): Standalone hash computation - VerifyAndAlert(): Boolean tampering detection with logging Add audit-verifier CLI tool: - Standalone binary for audit chain verification - Takes log path argument and reports tampering Update audit logger for chain integrity: - Each event includes sequence number and hash chain - SHA-256 linking: hash_n = SHA-256(prev_hash || event_n) - Tamper detection through hash chain validation Add comprehensive test coverage: - Empty log handling - Valid chain verification - Tampering detection with modification - Root hash consistency - Alert mechanism tests Part of: V.7 audit verification from security plan	2026-02-23 19:43:50 -05:00
Jeremie Fraeys	fccced6bb3	test(security): add comprehensive security unit tests ... Adds 13 security tests across 4 files for hardening verification: **Path Traversal Tests (path_traversal_test.go):** - TestSecurePathValidator_ValidRelativePath - TestSecurePathValidator_PathTraversalBlocked - TestSecurePathValidator_SymlinkEscape - Tests symlink resolution and path boundary enforcement **File Type Validation Tests (filetype_test.go):** - TestValidateFileType_AllowedTypes - TestValidateFileType_DangerousTypesBlocked - TestValidateModelFile - Tests magic bytes validation and dangerous extension blocking **Secrets Management Tests (secrets_test.go):** - TestExpandSecrets_BasicExpansion - TestExpandSecrets_NestedAndMissingVars - TestValidateNoPlaintextSecrets_HeuristicDetection - Tests env variable expansion and plaintext secret detection with entropy **Audit Logging Tests (audit_test.go):** - TestAuditLogger_ChainIntegrity - TestAuditLogger_VerifyChain - TestAuditLogger_LogFileAccess - TestAuditLogger_Disabled - Tests tamper-evident chain hashing and file access logging	2026-02-23 18:00:45 -05:00