|Initial release||April 2003, 06|
2022.83 / 14 November 2022
Dropbear is a software package written by Matt Johnston that provides a Secure Shell-compatible server and client. It is designed as a replacement for standard OpenSSH for environments with low memory and processor resources, such as embedded systems. It is a core component of OpenWrt and other router distributions.
Dropbear was originally released in April 2003.
Dropbear implements version 2 of the Secure Shell (SSH) protocol.
The cryptographic algorithms are implemented using third-party cryptographic libraries like LibTomCrypt included internally in the Dropbear distribution. It derives some parts from OpenSSH to handle BSD-style pseudo terminals.
Dropbear implements the complete SSH version 2 protocol in both the client and the server. It does not support SSH version 1 backwards-compatibility in order to save space and resources, and to avoid the inherent security vulnerabilities in SSH version 1. SCP is also implemented. SFTP support relies on a binary file which can be provided by OpenSSH or similar programs. FISH works in any case and is supported by Konqueror.
- "Release Dropbear 2022.83".
- "dropbear(8)". Ubuntu. Retrieved 2020-05-23.
- Matt Johnston. "Dropbear SSH". Retrieved 2020-05-23.
PTY handling code is taken from OpenSSH
- Matt Johnston (2004-06-01). "Makefile.in contains updated files required". Retrieved 2020-05-23.
- "CHANGES". 14 November 2013. Retrieved 2020-05-23.
ECC (elliptic curve) support. Supports ECDSA hostkeys (requires new keys to be generated) and ECDH for setting up encryption keys[...]