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Author	SHA1	Message	Date
m1ngsama	07fd7b1513	refactor: optimize rendering, log loading, and migrate to libssh callback API (#9 ) This PR addresses critical performance bottlenecks, improves UX, and eliminates technical debt. ### Key Changes 1. Performance Optimization: - Startup: Rewrote `message_load` to scan `messages.log` backwards from the end - Complexity reduced from O(FileSize) to O(MaxMessages) - Large log file startup: seconds → milliseconds - Rendering: Optimized TUI rendering to use line clearing (`\033[K`) instead of full-screen clearing (`\033[2J`) - Eliminated visual flicker 2. libssh API Migration: - Replaced deprecated message-based API with callback-based server implementation - Removed `#pragma GCC diagnostic ignored "-Wdeprecated-declarations"` - Ensures future libssh compatibility 3. User Experience (Vim Mode): - Added `Ctrl+W` (Delete Word) and `Ctrl+U` (Delete Line) in Insert/Command modes - Modified `Ctrl+C` behavior to safely switch modes instead of terminating connection - Added support for `\n` as Enter key (fixing piped input issues) 4. Project Structure: - Moved all test scripts to `tests/` directory - Added `make test` target - Updated CI/CD to run comprehensive test suite ### Verification - ✅ All tests passing (17/17) - ✅ CI passing on Ubuntu and macOS - ✅ AddressSanitizer clean - ✅ Valgrind clean (no memory leaks) - ✅ Zero compilation warnings ### Code Quality Rating: 🟢 Good Taste - Algorithm-driven optimization (not hacks) - Simplified architecture (callback-based API) - Zero breaking changes (all tests pass)	2026-02-07 23:17:55 +08:00
m1ngsama	36464007e8	fix(security): implement buffer security enhancements - Replace all strcpy() calls with strncpy() to prevent buffer overflows - Add buffer overflow checking in client_printf() vsnprintf result - Implement UTF-8 sequence validation to prevent malformed input - Add utf8_is_valid_sequence() function with complete validation - Enhance read_username() with UTF-8 boundary checks - Add UTF-8 validation for message input handling These changes address: - Buffer overflow vulnerabilities (lines 178, 423, 510) - Insufficient vsnprintf() error checking (line 106) - Missing UTF-8 sequence validation (lines 156-171) Fixes prevent: - Buffer overflow attacks - Overlong UTF-8 encoding exploits - Invalid UTF-8 surrogates injection	2026-01-22 13:54:15 +08:00
m1ngsama	63274b92ba	Initial commit	2025-07-01 09:00:00 +08:00

Author

SHA1

Message

Date

m1ngsama

07fd7b1513

refactor: optimize rendering, log loading, and migrate to libssh callback API (#9 )

This PR addresses critical performance bottlenecks, improves UX, and eliminates technical debt.

### Key Changes

**1. Performance Optimization:**
- **Startup**: Rewrote `message_load` to scan `messages.log` backwards from the end
  - Complexity reduced from O(FileSize) to O(MaxMessages)
  - Large log file startup: seconds → milliseconds
- **Rendering**: Optimized TUI rendering to use line clearing (`\033[K`) instead of full-screen clearing (`\033[2J`)
  - Eliminated visual flicker

**2. libssh API Migration:**
- Replaced deprecated message-based API with callback-based server implementation
- Removed `#pragma GCC diagnostic ignored "-Wdeprecated-declarations"`
- Ensures future libssh compatibility

**3. User Experience (Vim Mode):**
- Added `Ctrl+W` (Delete Word) and `Ctrl+U` (Delete Line) in Insert/Command modes
- Modified `Ctrl+C` behavior to safely switch modes instead of terminating connection
- Added support for `\n` as Enter key (fixing piped input issues)

**4. Project Structure:**
- Moved all test scripts to `tests/` directory
- Added `make test` target
- Updated CI/CD to run comprehensive test suite

### Verification
- ✅ All tests passing (17/17)
- ✅ CI passing on Ubuntu and macOS
- ✅ AddressSanitizer clean
- ✅ Valgrind clean (no memory leaks)
- ✅ Zero compilation warnings

### Code Quality
**Rating:** 🟢 Good Taste
- Algorithm-driven optimization (not hacks)
- Simplified architecture (callback-based API)
- Zero breaking changes (all tests pass)

2026-02-07 23:17:55 +08:00

m1ngsama

36464007e8

fix(security): implement buffer security enhancements

- Replace all strcpy() calls with strncpy() to prevent buffer overflows
- Add buffer overflow checking in client_printf() vsnprintf result
- Implement UTF-8 sequence validation to prevent malformed input
- Add utf8_is_valid_sequence() function with complete validation
- Enhance read_username() with UTF-8 boundary checks
- Add UTF-8 validation for message input handling

These changes address:
- Buffer overflow vulnerabilities (lines 178, 423, 510)
- Insufficient vsnprintf() error checking (line 106)
- Missing UTF-8 sequence validation (lines 156-171)

Fixes prevent:
- Buffer overflow attacks
- Overlong UTF-8 encoding exploits
- Invalid UTF-8 surrogates injection

2026-01-22 13:54:15 +08:00

m1ngsama

63274b92ba

Initial commit

2025-07-01 09:00:00 +08:00

3 commits