86eee44d14
security: Implement MEDIUM priority security improvements
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MEDIUM Priority Security Features:
- Backup retention policy with automatic cleanup
- Connection rate limiting with exponential backoff
- Privilege level checks (warn if running as root)
- System resource limit awareness (ulimit checks)
New Security Modules (internal/security/):
- retention.go: Automated backup cleanup based on age and count
- ratelimit.go: Connection attempt tracking with exponential backoff
- privileges.go: Root/Administrator detection and warnings
- resources.go: System resource limit checking (file descriptors, memory)
Retention Policy Features:
- Configurable retention period in days (--retention-days)
- Minimum backup count protection (--min-backups)
- Automatic cleanup after successful backups
- Removes old archives with .sha256 and .meta files
- Reports freed disk space
Rate Limiting Features:
- Per-host connection tracking
- Exponential backoff: 1s, 2s, 4s, 8s, 16s, 32s, max 60s
- Automatic reset after successful connections
- Configurable max retry attempts (--max-retries)
- Prevents brute force connection attempts
Privilege Checks:
- Detects root/Administrator execution
- Warns with security recommendations
- Requires --allow-root flag to proceed
- Suggests dedicated backup user creation
- Platform-specific recommendations (Unix/Windows)
Resource Awareness:
- Checks file descriptor limits (ulimit -n)
- Monitors available memory
- Validates resources before backup operations
- Provides recommendations for limit increases
- Cross-platform support (Linux, BSD, macOS, Windows)
Configuration Integration:
- All features configurable via flags and .dbbackup.conf
- Security section in config file
- Environment variable support
- Persistent settings across sessions
Integration Points:
- All backup operations (cluster, single, sample)
- Automatic cleanup after successful backups
- Rate limiting on all database connections
- Privilege checks before operations
- Resource validation for large backups
Default Values:
- Retention: 30 days, minimum 5 backups
- Max retries: 3 attempts
- Allow root: disabled
- Resource checks: enabled
Security Benefits:
- Prevents disk space exhaustion from old backups
- Protects against connection brute force attacks
- Encourages proper privilege separation
- Avoids resource exhaustion failures
- Compliance-ready audit trail
Testing:
- All code compiles successfully
- Cross-platform compatibility maintained
- Ready for production deployment
2025-11-25 14:15:27 +00:00
a0e7fd71de
security: Implement HIGH priority security improvements
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HIGH Priority Security Features:
- Path sanitization with filepath.Clean() for all user paths
- Path traversal attack prevention in backup/restore operations
- Secure config file permissions (0600 instead of 0644)
- SHA-256 checksum generation for all backup archives
- Checksum verification during restore operations
- Comprehensive audit logging for compliance
New Security Module (internal/security/):
- paths.go: ValidateBackupPath() and ValidateArchivePath()
- checksum.go: ChecksumFile(), VerifyChecksum(), LoadAndVerifyChecksum()
- audit.go: AuditLogger with structured event tracking
Integration Points:
- Backup engine: Path validation, checksum generation
- Restore engine: Path validation, checksum verification
- All backup/restore operations: Audit logging
- Configuration saves: Audit logging
Security Enhancements:
- .dbbackup.conf now created with 0600 permissions (owner-only)
- All archive files get .sha256 checksum files
- Restore warns if checksum verification fails but continues
- Audit events logged for all administrative operations
- User tracking via $USER/$USERNAME environment variables
Compliance Features:
- Audit trail for backups, restores, config changes
- Structured logging with timestamps, users, actions, results
- Event details include paths, sizes, durations, errors
Testing:
- All code compiles successfully
- Cross-platform build verified
- Ready for integration testing
2025-11-25 12:03:21 +00:00
e80c16bf0e
Add reliability improvements and config persistence feature
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- Implement context cleanup with sync.Once and io.Closer interface
- Add regex-based error classification for robust error handling
- Create ProcessManager with thread-safe process tracking
- Add disk space caching with 30s TTL for performance
- Implement metrics collection with structured logging
- Add config persistence (.dbbackup.conf) for directory-local settings
- Auto-save/auto-load configuration with --no-config and --no-save-config flags
- Successfully tested with 42GB d7030 database (35K large objects, 36min backup)
- All cross-platform builds working (9/10 platforms)
2025-11-19 04:43:22 +00:00
