source: https://github.com/jruby/jruby-openssl/blob/v0.9.21/LICENSE.txt

JRuby-OpenSSL is distributed under the same license as JRuby a tri EPL/GPL/LGPL
license. You can use it, redistribute it and/or modify it under the terms of the:

  Eclipse Public License version 1.0
  GNU General Public License version 2.0
  GNU Lesser General Public License version 2.1

The contents of this file are subject to the Common Public License Version 1.0
(the "License"); you may not use this file except in compliance with the License.
You may obtain a copy of the License at http://www.eclipse.org/legal/cpl-v10.html

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR APARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

  Copyright (C) 2007-2009 Ola Bini <ola.bini@gmail.com>
  Copyright (C) 2009-2017 The JRuby Team

Alternatively, the contents of this file may be used under the terms of
either of the GNU General Public License Version 2 or later (the "GPL"),
or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
in which case the provisions of the GPL or the LGPL are applicable instead
of those above. If you wish to allow use of your version of this file only
under the terms of either the GPL or the LGPL, and not to allow others to
use your version of this file under the terms of the EPL, indicate your
decision by deleting the provisions above and replace them with the notice
and other provisions required by the GPL or the LGPL. If you do not delete
the provisions above, a recipient may use your version of this file under
the terms of any one of the EPL, the GPL or the LGPL.


JRuby-OpenSSL includes software by The Legion of the Bouncy Castle Inc.
Please, visit (http://bouncycastle.org/license.html) for licensing details.