4 The OpenSSL Project is a collaborative effort to develop a robust,
5 commercial-grade, fully featured, and Open Source toolkit implementing the
6 Transport Layer Security (TLS) protocols (including SSLv3) as well as a
7 full-strength general purpose cryptographic library.
9 OpenSSL is descended from the SSLeay library developed by Eric A. Young
12 The OpenSSL toolkit is licensed under the Apache License 2.0, which means
13 that you are free to get and use it for commercial and non-commercial
14 purposes as long as you fulfill its conditions.
19 The OpenSSL toolkit includes:
22 Provides the client and server-side implementations for SSLv3 and TLS.
25 Provides general cryptographic and X.509 support needed by SSL/TLS but
26 not logically part of it.
29 A command line tool that can be used for:
30 Creation of key parameters
31 Creation of X.509 certificates, CSRs and CRLs
32 Calculation of message digests
33 Encryption and decryption
34 SSL/TLS client and server tests
35 Handling of S/MIME signed or encrypted mail
41 See the appropriate file:
43 * [INSTALL](INSTALL): General installation instructions for all platforms
44 * Additional instructions for specific platforms
45 * [NOTES.ANDROID](NOTES.ANDROID)
46 * [NOTES.DJGPP](NOTES.DJGPP)
47 * [NOTES.PERL](NOTES.PERL)
48 * [NOTES.UNIX](NOTES.UNIX)
49 * [NOTES.VALGRIND](NOTES.VALGRIND)
50 * [NOTES.VMS](NOTES.VMS)
51 * [NOTES.WIN](NOTES.WIN)
56 See the OpenSSL website www.openssl.org for details on how to obtain
57 commercial technical support. Free community support is available through the
58 openssl-users email list (see
59 https://www.openssl.org/community/mailinglists.html for further details).
61 If you have any problems with OpenSSL then please take the following steps
64 - Download the latest version from the repository
65 to see if the problem has already been addressed
66 - Configure with no-asm
67 - Remove compiler optimization flags
69 If you wish to report a bug then please include the following information
70 and create an issue on GitHub:
72 - OpenSSL version: output of 'openssl version -a'
73 - Configuration data: output of 'perl configdata.pm --dump'
74 - OS Name, Version, Hardware platform
75 - Compiler Details (name, version)
76 - Application Details (name, version)
77 - Problem Description (steps that will reproduce the problem, if known)
78 - Stack Traceback (if the application dumps core)
80 Just because something doesn't work the way you expect does not mean it
81 is necessarily a bug in OpenSSL. Use the openssl-users email list for this type
84 How to contribute to OpenSSL
85 ============================
87 See [CONTRIBUTING](CONTRIBUTING.md)
92 A number of nations restrict the use or export of cryptography. If you
93 are potentially subject to such restrictions you should seek competent
94 professional legal advice before attempting to develop or distribute
101 Copyright (c) 1998-2018 The OpenSSL Project
103 Copyright (c) 1995-1998 Eric A. Young, Tim J. Hudson