Administrator's Guide

Appendix E. License Conditions
that.
OpenSSH contains no GPL code.
1. Copyright (c) 1995 Tatu Ylonen <[e-mail]>, Espoo, Finland All rights re-
served
As far as I am concerned, the code I have written for this software can be used freely
for any purpose. Any derived versions of this software must be clearly marked as such,
and if the derived work is incompatible with the protocol description in the RFC file, it
must be called by a name other than "ssh" or "Secure Shell".
[Tatu continues]
However, I am not implying to give any licenses to any patents or copyrights held by
third parties, and the software includes parts that are not under my direct control. As
far as I know, all included source code is used in accordance with the relevant license
agreements and can be used freely for any purpose (the GNU license being the most
restrictive); see below for details.
[However, none of that term is relevant at this point in time. All of these restrictively
licenced software components which he talks about have been removed from OpenSSH,
i.e.,
• RSA is no longer included, found in the OpenSSL library
• IDEA is no longer included, its use is deprecated
• DES is now external, in the OpenSSL library
• GMP is no longer used, and instead we call BN code from OpenSSL
• Zlib is now external, in a library
• The make-ssh-known-hosts script is no longer included
• TSS has been removed
• MD5 is now external, in the OpenSSL library
• RC4 support has been replaced with ARC4 support from OpenSSL
• Blowfish is now external, in the OpenSSL library
[The licence continues]
Note that any information and cryptographic algorithms used in this software are pub-
licly available on the Internet and at any major bookstore, scientific library, and patent
office worldwide. More information can be found e.g. at http://www.cs.hut.fi/crypto.
The legal status of this program is some combination of all these permissions and re-
strictions. Use only at your own responsibility. You will be responsible for any legal
consequences yourself; I am not making any claims whether possessing or using this is
legal or not in your country, and I am not taking any responsibility on your behalf.
NO WARRANTY
BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO
WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLI-
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