2 Copyright (c) 1998-2018 The OpenSSL Project
3 Copyright (c) 1995-1998 Eric A. Young, Tim J. Hudson
9 The OpenSSL Project is a collaborative effort to develop a robust,
10 commercial-grade, fully featured, and Open Source toolkit implementing the
11 Transport Layer Security (TLS) protocols (including SSLv3) as well as a
12 full-strength general purpose cryptographic library.
14 OpenSSL is descended from the SSLeay library developed by Eric A. Young
17 The OpenSSL toolkit is licensed under the Apache License 2.0, which means
18 that you are free to get and use it for commercial and non-commercial
19 purposes as long as you fulfill its conditions.
24 The OpenSSL toolkit includes:
26 libssl (with platform specific naming):
27 Provides the client and server-side implementations for SSLv3 and TLS.
29 libcrypto (with platform specific naming):
30 Provides general cryptographic and X.509 support needed by SSL/TLS but
31 not logically part of it.
34 A command line tool that can be used for:
35 Creation of key parameters
36 Creation of X.509 certificates, CSRs and CRLs
37 Calculation of message digests
38 Encryption and decryption
39 SSL/TLS client and server tests
40 Handling of S/MIME signed or encrypted mail
46 See the appropriate file:
47 INSTALL Linux, Unix, Windows, OpenVMS, ...
48 NOTES.* INSTALL addendums for different platforms
53 See the OpenSSL website www.openssl.org for details on how to obtain
54 commercial technical support. Free community support is available through the
55 openssl-users email list (see
56 https://www.openssl.org/community/mailinglists.html for further details).
58 If you have any problems with OpenSSL then please take the following steps
61 - Download the latest version from the repository
62 to see if the problem has already been addressed
63 - Configure with no-asm
64 - Remove compiler optimization flags
66 If you wish to report a bug then please include the following information
67 and create an issue on GitHub:
69 - OpenSSL version: output of 'openssl version -a'
70 - Configuration data: output of 'perl configdata.pm --dump'
71 - OS Name, Version, Hardware platform
72 - Compiler Details (name, version)
73 - Application Details (name, version)
74 - Problem Description (steps that will reproduce the problem, if known)
75 - Stack Traceback (if the application dumps core)
77 Just because something doesn't work the way you expect does not mean it
78 is necessarily a bug in OpenSSL. Use the openssl-users email list for this type
81 HOW TO CONTRIBUTE TO OpenSSL
82 ----------------------------
89 A number of nations restrict the use or export of cryptography. If you
90 are potentially subject to such restrictions you should seek competent
91 professional legal advice before attempting to develop or distribute