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Copyrights
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
The names of the authors and copyright holders must not be used in advertising or otherwise to promote
the sale, use or other dealing in this Software without specific, written prior permission. Title to copyright
in this Software shall at all times remain with copyright holders.

Open SSH

The licences which components of this software fall under are as follows. First, we will summarize and say
that all components are under a BSD licence, or a licence more free than that.
OpenSSH contains no GPL code.
1)
Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland All rights reserved
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
7
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]
295

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