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Developer(s)John Safranek
Initial releaseJuly 20, 2016 (2016-07-20)[1]
Written inC language
Operating systemMulti-platform
TypeSecurity library
LicenseGNU General Public License or Commercial Distribution License

wolfSSH is a small, portable, embedded SSH library targeted for use by embedded systems developers. It is an open-source implementation of SSH written in the C language. It includes SSH client libraries and an SSH server implementation. It allows for password and public key authentication.


wolfSSH is currently available for Win32/64, Linux, macOS, Solaris, Threadx, VxWorks, FreeBSD, NetBSD, OpenBSD, embedded Linux, WinCE, Haiku, OpenWrt, iPhone, Android, Nintendo Wii and Gamecube through DevKitPro support, QNX, MontaVista, Tron variants, NonStop, OpenCL, Micrium's MicroC/OS-II, FreeRTOS, SafeRTOS, Freescale MQX, Nucleus, TinyOS, TI-RTOS, HP-UX, uTasker, and embOS.


The wolfSSH lightweight SSH library implements the SSHv2 protocol.


wolfSSH uses the cryptographic services provided by wolfCrypt.[2] wolfCrypt Provides RSA, ECC, Diffie–Hellman, AES (CBC, GCM), Random Number Generation, Large Integer support, and base 16/64 encoding/decoding.

Key Exchange[edit]

  • diffie-hellman-group1-sha1
  • diffie-hellman-group14-sha1
  • diffie-hellman-group-exchange-sha256
  • ecdh-sha2-nistp256
  • ecdh-sha2-nistp384
  • ecdh-sha2-nistp521

Public Key[edit]

  • ssh-rsa
  • ecdsa-sha2-nistp256
  • ecdsa-sha2-nistp384
  • ecdsa-sha2-nistp521


  • hmac-sha1
  • hmac-sha1-96
  • hmac-sha2-256


  • aes128-cbc
  • aes128-gcm (OpenSSH compatible)


wolfSSH is open source, licensed under the GNU General Public License GPLv3.[3]

See also[edit]


  1. ^ "wolfSSH ChangeLog".
  2. ^ wolfCrypt Usage Reference
  3. ^ GNU License

External links[edit]