libssh
- Homepage: https://www.libssh.org/
- First release: 2003-09-03
- Latest release: 0.12.0 (2026-02-10)
- Version history: https://git.libssh.org/projects/libssh.git/tree/CHANGELOG?h=libssh-0.12.0
- Source repository: https://git.libssh.org/projects/libssh.git
- License: LGPL 2.1
- Client: true
- Server: true
Remarks
- Mulitplatform C library for clients and servers.
- Not to be confused with the unrelated libssh2
Supported protocols
Ciphers: chacha20-poly1305@openssh.com, aes256-gcm@openssh.com, aes128-gcm@openssh.com, aes256-ctr, aes192-ctr, aes128-ctr, aes256-cbc, aes192-cbc, aes128-cbc, blowfish-cbc, 3des-cbc
Compression formats: zlib, zlib@openssh.com, none
Hostkey formats: ssh-ed25519, ssh-ed25519-cert-v01@openssh.com, ecdsa-sha2-nistp256, ecdsa-sha2-nistp384, ecdsa-sha2-nistp521, ecdsa-sha2-nistp256-cert-v01@openssh.com, ecdsa-sha2-nistp384-cert-v01@openssh.com, ecdsa-sha2-nistp521-cert-v01@openssh.com, rsa-sha2-256, rsa-sha2-512, rsa-sha2-512-cert-v01@openssh.com, rsa-sha2-256-cert-v01@openssh.com, ssh-rsa, ssh-rsa-cert-v01@openssh.com, sk-ssh-ed25519@openssh.com, sk-ssh-ed25519-cert-v01@openssh.com, sk-ecdsa-sha2-nistp256@openssh.com, sk-ecdsa-sha2-nistp256-cert-v01@openssh.com
Key exchange protocols: curve25519-sha256, curve25519-sha256@libssh.org, ecdh-sha2-nistp521, ecdh-sha2-nistp384, ecdh-sha2-nistp256, diffie-hellman-group18-sha512, diffie-hellman-group16-sha512, diffie-hellman-group14-sha256, diffie-hellman-group-exchange-sha256, diffie-hellman-group-exchange-sha1, diffie-hellman-group14-sha1, diffie-hellman-group1-sha1, gss-curve25519-sha256-*, gss-group14-sha256-*, gss-group16-sha512-*, gss-nistp256-sha256-*, mlkem768nistp256-sha256, mlkem768x25519-sha256, mlkem1024nistp384-sha384, sntrup761x25519-sha512, sntrup761x25519-sha512@openssh.com, ext-info-c, kex-strict-c-v00@openssh.com, kex-strict-s-v00@openssh.com
Message authentication codes (MACs): hmac-sha2-512-etm@openssh.com, hmac-sha2-256-etm@openssh.com, hmac-sha1-etm@openssh.com, hmac-md5-etm@openssh.com, hmac-sha2-512, hmac-sha2-256, hmac-sha1, hmac-md5
User authentication methods: password, publickey, hostbased, keyboard-interactive, gssapi-keyex, gssapi-with-mic, publickey-hostbound-v00@openssh.com
Protocol extensions: publickey-hostbound@openssh.com, server-sig-algs