sencrypt
========

Description
-----------

sencrypt and sdecrypt are utilities for encrypting and decrypting data with the
AES, DES, 3DES, and RC4 algorithms. It can read keys from files or ask for a
passphrase and use that together with a salt to derive a key using the PBKDF2
key derivation function.

sencrypt and sdecrypt are portable and compatible reimplementations of the
encrypt and decrypt utilities in Solaris/Illumos-based operating systems.

Build Instructions
------------------

sencrypt requires a POSIX:2004 compatible operating system, it has been tested
to work on Linux distributions, FreeBSD, Solaris and Illumos-derived
distributions, UnixWare, OpenServer, and AIX.  The following tools and shared
libraries are required to build sencrypt:

- GNU make >= 3.81
- GNU or BSD install
- OpenSSL

Rebuilding the man pages additionally requires the xsltproc tool from libxml2.

Before building sencrypt check the commented macros in the Makefile for any
macros you may need to override depending on the used toolchain and operating
system.

By default, all files will be installed under the "/usr/local" directory, a
different installation path prefix can be set via the `prefix` macro.  In
addition, a second path prefix can be specified via the `DESTDIR` macro which
will be prepended to any path, incuding the `prefix` macro path prefix.  In
contrast to `prefix`, the path specified via the `DESTDIR` macro will only be
prepended to paths during installation and not be used for constructing
internal paths.

The following instructions assume that `make` is GNU make, on some platforms
it may be installed under a different name or a non-default path.  In order to
start the build process run `make all`.  After a successful build, run `make
install` to install the program, any associated data files and the
documentation.

Previously built binaries, object files, generated data files and
documentation can be removed by running `make clean`, any additional,
generated files which are not removed by the `clean` target can be removed by
running `make clobber`.

Contact
-------

Please send any feedback, translations or bug reports via email to
<guido+sencrypt@berhoerster.name>.

Bug Reports
-----------

When sending bug reports, please always mention the exact version of sencrypt
with which the issue occurs as well as the version of the operating system you
are using and make sure that you provide sufficient information to reproduce
the issue and include any input, output, any error messages.

In case of build issues, please also specify the implementations and versions
of the tools and shared libraries used to build the program, in particular the
compiler.

In case of crashes, please generate a stack trace with a suitable debugger
such as gdb, lldb, dbx, or debug after a crash has occurred either by
examining the resulting core file or by running the program from the debugger
and attach it to the bug report.  In order to generate a meaningful stack
trace the program as well as any dynamically linked libraries need to be built
with debugging information, see the documentation of the used compiler for the
required compiler flags.  If any of the dynamically linked shared libraries do
not contain debugging information, please either install debugging information
for these libraries using mechanisms provided by your operating system or
rebuild the libraries accordingly.  Please refer to the documentation of the
debugger for detailed instructions on generating backtraces.

License
-------

Except otherwise noted, all files are Copyright (C) 2014 Guido Berhoerster and
distributed under the following license terms:

Copyright (C) 2014 Guido Berhoerster <guido+sencrypt@berhoerster.name>

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

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 A PARTICULAR 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.