Cisco Cisco MediaSense Release 9.1(1) Licensing Information

problems to some. This document attempts to describe what licenses libcurl and

the other libraries use and what possible dilemmas linking and mixing them all

can lead to for end users.

 

I am not a lawyer and this is not legal advice!

 

One common dilemma is that GPL[1]-licensed code is not allowed to be linked

with code licensed under the Original BSD license (with the announcement

clause). You may still build your own copies that use them all, but

distributing them as binaries would be to violate the GPL license - unless you

accompany your license with an exception[2]. This particular problem was

addressed when the Modified BSD license was created, which does not have the

announcement clause that collides with GPL.

 

libcurl http://curl.haxx.se/docs/copyright.html

 

       Uses an MIT (or Modified BSD)-style license that is as liberal as

       possible.  Some of the source files that deal with KRB4 have Original

       BSD-style announce-clause licenses. You may not distribute binaries

       with krb4-enabled libcurl that also link with GPL-licensed code!

 

OpenSSL http://www.openssl.org/source/license.html

 

       (May be used for SSL/TLS support) Uses an Original BSD-style license

       with an announcement clause that makes it "incompatible" with GPL. You

       are not allowed to ship binaries that link with OpenSSL that includes

       GPL code (unless that specific GPL code includes an exception for

       OpenSSL - a habit that is growing more and more common). If OpenSSL's

       licensing is a problem for you, consider using GnuTLS or yassl

       instead.

 

GnuTLS  http://www.gnutls.org/

 

       (May be used for SSL/TLS support) Uses the LGPL[3] license. If this is

       a problem for you, consider using OpenSSL instead. Also note that

       GnuTLS itself depends on and uses other libs (libgcrypt and

       libgpg-error) and they too are LGPL- or GPL-licensed.

 

yassl   http://www.yassl.com/

 

       (May be used for SSL/TLS support) Uses the GPL[1] license. If this is

       a problem for you, consider using OpenSSL or GnuTLS instead.

 

NSS     http://www.mozilla.org/projects/security/pki/nss/

 

       (May be used for SSL/TLS support) Is covered by the MPL[4] license,

       the GPL[1] license and the LGPL[3] license. You may choose to license

       the code under MPL terms, GPL terms, or LGPL terms. These licenses