https://github.com/janmojzis/tinyssh

TinySSH is small server (less than 100000 words of code)
https://github.com/janmojzis/tinyssh

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TinySSH is small server (less than 100000 words of code)

• Host: GitHub
• URL: https://github.com/janmojzis/tinyssh
• Owner: janmojzis
• License: cc0-1.0
• Created: 2015-01-01T10:46:28.000Z (almost 10 years ago)
• Default Branch: master
• Last Pushed: 2024-01-15T14:18:47.000Z (11 months ago)
• Last Synced: 2024-02-15T15:31:46.336Z (10 months ago)
• Language: C
• Homepage:
• Size: 1.61 MB
• Stars: 990
• Watchers: 40
• Forks: 67
• Open Issues: 13
• Metadata Files:
  • Readme: README.md

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• favorite-link - TinySSH 是小型服务器 (少于 100000 字的代码)。

README

        
### Introduction ###

* tinysshd is a minimalistic SSH server which implements only a subset of SSHv2 features.

* tinysshd supports only secure cryptography (minimum 128-bit security, protected against cache-timing attacks)

* tinysshd doesn't implement older crypto (such as RSA, DSA, HMAC-MD5, HMAC-SHA1, 3DES, RC4, ...)

* tinysshd doesn't implement unsafe features (such as password or hostbased authentication)

* tinysshd doesn't have features such: SSH1 protocol, compression, port forwarding, agent forwarding, X11 forwarding ...

* tinysshd doesn't use dynamic memory allocation (no allocation failures, etc.)

### Crypto primitives ###

* State-of-the-art crypto: ssh-ed25519, curve25519-sha256, [email protected]

* Older standard: ecdsa-sha2-nistp256, ecdh-sha2-nistp256, aes256-ctr, hmac-sha2-256 removed in version 20190101

* Postquantum crypto: [email protected], [email protected]

### Project timelime ###

* experimental: 2014.01.01 - 2014.12.31 (experimentation)

* alpha(updated): 2015.01.01 - 2017.12.31 (not ready for production use, ready for testing)

* beta(updated): 2018.01.01 - ????.??.?? (ready for production use)

* stable: expected ????.??.?? - (ready for production use - including post-quantum crypto)

### Current release (20240101) ###

* has 63899 words of code

* beta release

### How-to run ###

~~~

       TCPSERVER

              tcpserver -HRDl0 0.0.0.0 22 /usr/sbin/tinysshd -v /etc/tinyssh/sshkeydir &

       BUSYBOX

              busybox tcpsvd 0 22 tinysshd -v /etc/tinyssh/sshkeydir &

       INETD

           /etc/inetd.conf:

               ssh stream tcp nowait root /usr/sbin/tinysshd tinysshd -l -v /etc/tinyssh/sshkeydir

       SYSTEMD

           tinysshd.socket:

               [Unit]

               Description=TinySSH server socket

               ConditionPathExists=!/etc/tinyssh/disable_tinysshd

               [Socket]

               ListenStream=22

               Accept=yes

               [Install]

               WantedBy=sockets.target

           [email protected]:

               [Unit]

               Description=Tiny SSH server

               After=network.target auditd.service

               [Service]

               ExecStartPre=-/usr/sbin/tinysshd-makekey -q /etc/tinyssh/sshkeydir

               EnvironmentFile=-/etc/default/tinysshd

               ExecStart=/usr/sbin/tinysshd ${TINYSSHDOPTS} -- /etc/tinyssh/sshkeydir

               KillMode=process

               SuccessExitStatus=111

               StandardInput=socket

               StandardError=journal

               [Install]

               WantedBy=multi-user.target

~~~