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TNT's Not Tunnel
134 commits 10 branches 0 tags 360 KiB
C 80.9%
Shell 17%
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m1ngsama 325e524cee fix(security): implement SSH hardening improvements 
- Upgrade RSA key size from 2048 to 4096 bits for stronger encryption
- Fix key file permission time window with atomic generation:
  * Use umask(0077) before file creation
  * Generate key to temporary file first
  * Atomically rename to final location
- Add configurable bind address via TNT_BIND_ADDR environment variable
- Add configurable SSH log level via TNT_SSH_LOG_LEVEL (0-4)

These changes address:
- Weak 2048-bit RSA keys
- Permission race condition during key generation
- Hardcoded bind address limiting deployment flexibility
- Inflexible logging configuration

Environment variables:
- TNT_BIND_ADDR: Bind address (default: 0.0.0.0)
- TNT_SSH_LOG_LEVEL: SSH logging verbosity 0-4 (default: 1)
2026-01-22 13:57:32 +08:00
.github/workflows Add CI/CD and deployment automation 2025-12-02 12:47:15 +08:00
include Fix critical memory and concurrency bugs 2025-11-30 09:00:00 +08:00
src fix(security): implement SSH hardening improvements 2026-01-22 13:57:32 +08:00
.gitignore Add development and testing infrastructure 2025-12-02 10:00:00 +08:00
CHANGELOG.md Add developer documentation 2025-12-02 15:00:00 +08:00
CICD.md Add CI/CD and deployment automation 2025-12-02 12:47:15 +08:00
DEPLOYMENT.md Add CI/CD and deployment automation 2025-12-02 12:47:15 +08:00
HACKING Add developer documentation 2025-12-02 15:00:00 +08:00
install.sh Add CI/CD and deployment automation 2025-12-02 12:47:15 +08:00
LICENSE Initial commit 2025-07-01 09:00:00 +08:00
Makefile Add development and testing infrastructure 2025-12-02 10:00:00 +08:00
QUICKREF Add developer documentation 2025-12-02 15:00:00 +08:00
README Rewrite README in classic Unix style 2025-12-02 12:57:18 +08:00
README.md Rewrite README in classic Unix style 2025-12-02 12:57:18 +08:00
test_basic.sh Add development and testing infrastructure 2025-12-02 10:00:00 +08:00
test_stress.sh Add development and testing infrastructure 2025-12-02 10:00:00 +08:00
tnt.service Add CI/CD and deployment automation 2025-12-02 12:47:15 +08:00

README.md

TNT

Terminal chat server. Vim-style interface. SSH-based.

Install

curl -sSL https://raw.githubusercontent.com/m1ngsama/TNT/main/install.sh | sh

Or download from releases.

Run

tnt              # port 2222
tnt -p 3333      # custom port
PORT=3333 tnt    # env var

Connect: ssh -p 2222 localhost

Keys

INSERT (default)

  • ESC → NORMAL
  • Enter → send
  • Backspace → delete

NORMAL

  • i → INSERT
  • : → COMMAND
  • j/k → scroll
  • g/G → top/bottom
  • ? → help

COMMAND

  • :list → users
  • :help → commands
  • ESC → back

Build

make              # normal
make debug        # with symbols
make asan         # sanitizer
make check        # static analysis

Requires: libssh

Deploy

See DEPLOYMENT.md for systemd setup.

Files

messages.log      chat history
host_key          SSH key (auto-gen)
tnt.service       systemd unit

Test

./test_basic.sh         # functional
./test_stress.sh 50     # 50 clients

Docs

  • README - man page style
  • HACKING - dev guide
  • DEPLOYMENT.md - production
  • CICD.md - automation
  • QUICKREF - cheat sheet

License

MIT