Dropbear (software)
| Dropbear | |
|---|---|
| Developer | Matt Johnston |
| Release | April 2003, 06 |
| Stable release | |
| Written in | C |
| Operating system | Unix-like |
| Type | Remote access |
| License | MIT license |
| Website | matt |
| Repository | |
Dropbear is a software package written by Matt Johnston that provides a Secure Shell-compatible server and client.[2] 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.
Technology
[edit]Dropbear implements version 2 of the Secure Shell (SSH) protocol.[3]
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.[4]
Features
[edit]Dropbear implements the complete SSH version 2 protocol in both the client and the server.[5][6] 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.[7] SFTP support relies on a binary file which can be provided by OpenSSH or similar programs.[citation needed] FISH works in any case and is supported by Konqueror.
Dropbear supports elliptic curve cryptography for key exchange, as of version 2013.61test and beyond.[8]
See also
[edit]
- Lsh – GNU Project's implementation of ssh
- Comparison of SSH clients
- Comparison of SSH servers
References
[edit]- ↑ "Dropbear SSH".
- ↑ "VA Technical Reference Model v 24.4. Dropbear Secure Shell (SSH) Server". oit.va.gov. 2019-09-04. Archived from the original on 2024-06-15. Retrieved 2024-06-27.
- ↑ "dropbear(8)". Ubuntu. Archived from the original on 2021-12-01. Retrieved 2020-05-23.
- ↑ Matt Johnston. "Dropbear SSH". Archived from the original on 2018-03-30. Retrieved 2020-05-23.
PTY handling code is taken from OpenSSH
- ↑ Liu, Dale (2011-04-18). Next Generation SSH2 Implementation: Securing Data in Motion. Syngress. ISBN 978-0-08-057000-6.
- ↑ Aufranc, Jean-Luc (October 6, 2011). "Dropbear: Lightweight SSH Server". CodingHW. Archived from the original on 2024-06-27. Retrieved 2024-06-27.
- ↑ Matt Johnston (2004-06-01). "Makefile.in contains updated files required". Retrieved 2020-05-23.[permanent dead link]
- ↑ "CHANGES". 14 November 2013. Archived from the original on 2018-03-23. Retrieved 2020-05-23.
ECC (elliptic curve) support. Supports ECDSA hostkeys (requires new keys to be generated) and ECDH for setting up encryption keys[...]
External links
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