base on TinySSH is small server (less than 100000 words of code) ### 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: <strike>ecdsa-sha2-nistp256, ecdh-sha2-nistp256, aes256-ctr, hmac-sha2-256</strike> removed in version 20190101 * Postquantum crypto: [email protected], [email protected] ### Project timelime ### * <strike>experimental: 2014.01.01 - 2014.12.31 (experimentation)</strike> * <strike>alpha(updated): 2015.01.01 - 2017.12.31 (not ready for production use, ready for testing)</strike> * 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 compile and install ### ~~~ make sudo make install ~~~ ### How-to run ### ~~~ mkdir -p /etc/tinyssh tinysshd-makekey /etc/tinyssh/sshkeydir ~~~ ~~~ 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 ~~~ ", Assign "at most 3 tags" to the expected json: {"id":"8845","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"