A local copy of OpenSSL from GitHub
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Bodo Möller dcba2534fa
Avoid leaking memory in thread_hash (and enable memory leak detection
23 years ago
MacOS MacOS pseudo-random entropy collector. 23 years ago
VMS Changes to synchronise with Unix. 23 years ago
apps Stylistic changes: Don't use a macro for the malloc'ed length since it 23 years ago
bugs Fix for Netscape "hang" bug. 23 years ago
certs Fix a bug in the modified purpose code: it wasn't updated to use the 24 years ago
crypto Avoid leaking memory in thread_hash (and enable memory leak detection 23 years ago
demos Modernise 'selfsign.c' to use new X509_NAME code 23 years ago
doc Correction. 23 years ago
include Add include dir 25 years ago
ms Don't generate asm files for no-asm. 23 years ago
perl Remove obsolete files. 24 years ago
rsaref Preserve reason strings in automatically build tables. 23 years ago
shlib A couple of corrections concerning HPUX 10 and shared libraries. 23 years ago
ssl "make update" 23 years ago
test Small bugs in the test scripts removed. 23 years ago
times Submitted by: 24 years ago
tools mk1mf.pl and mkdef.pl read OPTIONS from toplevel Makefile. 24 years ago
util linux-elf bugfix 23 years ago
.cvsignore The selftest sometimes lacked important information 23 years ago
CHANGES Avoid leaking memory in thread_hash (and enable memory leak detection 23 years ago
CHANGES.SSLeay *** empty log message *** 25 years ago
Configure I forgot about $openssl_other_defines ... should probably do this 23 years ago
FAQ Extend entry on ERR_print_errors. 23 years ago
INSTALL Explain configuration options more completely. 23 years ago
INSTALL.MacOS Further work on MacOS port. See INSTALL.MacOS for details. 24 years ago
INSTALL.VMS OpenVMS often has problems with files with more than on period in it. 23 years ago
INSTALL.W32 Mingw32 can now use assembler. 23 years ago
LICENSE Increase the year by one. 23 years ago
Makefile.org This commit ties the new DSO code (crypto/dso/) into the build for a 23 years ago
NEWS Mention the bug fixes. 23 years ago
README Version and name changes, and a last minute changelog 23 years ago
STATUS New function ERR_error_string_n. 23 years ago
TABLE "make update" for DSO additions. 23 years ago
config Added configuration support for Linux/IA64 23 years ago
e_os.h ssize_t for Ultrix 23 years ago
e_os2.h Some pre-POSIX systems don't have unistd.h (but e.g. lib.c). 24 years ago
install.com Make sure installed files are world readable 24 years ago
makevms.com Make it possible top build just a part of the crypto library. 23 years ago
openssl.doxy Add functions to add certs to stacks, used for CA file/path stuff in servers. 24 years ago


OpenSSL 0.9.5a 1 Apr 2000

Copyright (c) 1998-2000 The OpenSSL Project
Copyright (c) 1995-1998 Eric A. Young, Tim J. Hudson
All rights reserved.


The OpenSSL Project is a collaborative effort to develop a robust,
commercial-grade, fully featured, and Open Source toolkit implementing the
Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1)
protocols as well as a full-strength general purpose cryptography library.
The project is managed by a worldwide community of volunteers that use the
Internet to communicate, plan, and develop the OpenSSL toolkit and its
related documentation.

OpenSSL is based on the excellent SSLeay library developed from Eric A. Young
and Tim J. Hudson. The OpenSSL toolkit is licensed under a dual-license (the
OpenSSL license plus the SSLeay license) situation, which basically means
that you are free to get and use it for commercial and non-commercial
purposes as long as you fulfill the conditions of both licenses.


The OpenSSL toolkit includes:

Implementation of SSLv2, SSLv3, TLSv1 and the required code to support
both SSLv2, SSLv3 and TLSv1 in the one server and client.

General encryption and X.509 v1/v3 stuff needed by SSL/TLS but not
actually logically part of it. It includes routines for the following:

libdes - EAY's libdes DES encryption package which has been floating
around the net for a few years. It includes 15
'modes/variations' of DES (1, 2 and 3 key versions of ecb,
cbc, cfb and ofb; pcbc and a more general form of cfb and
ofb) including desx in cbc mode, a fast crypt(3), and
routines to read passwords from the keyboard.
RC4 encryption,
RC2 encryption - 4 different modes, ecb, cbc, cfb and ofb.
Blowfish encryption - 4 different modes, ecb, cbc, cfb and ofb.
IDEA encryption - 4 different modes, ecb, cbc, cfb and ofb.

MD5 and MD2 message digest algorithms, fast implementations,
SHA (SHA-0) and SHA-1 message digest algorithms,
MDC2 message digest. A DES based hash that is popular on smart cards.

Public Key
RSA encryption/decryption/generation.
There is no limit on the number of bits.
DSA encryption/decryption/generation.
There is no limit on the number of bits.
Diffie-Hellman key-exchange/key generation.
There is no limit on the number of bits.

X.509v3 certificates
X509 encoding/decoding into/from binary ASN1 and a PEM
based ascii-binary encoding which supports encryption with a
private key. Program to generate RSA and DSA certificate
requests and to generate RSA and DSA certificates.

The normal digital envelope routines and base64 encoding. Higher
level access to ciphers and digests by name. New ciphers can be
loaded at run time. The BIO io system which is a simple non-blocking
IO abstraction. Current methods supported are file descriptors,
sockets, socket accept, socket connect, memory buffer, buffering, SSL
client/server, file pointer, encryption, digest, non-blocking testing
and null.

Data structures
A dynamically growing hashing system
A simple stack.
A Configuration loader that uses a format similar to MS .ini files.

A command line tool that can be used for:
Creation of RSA, DH and DSA key parameters
Creation of X.509 certificates, CSRs and CRLs
Calculation of Message Digests
Encryption and Decryption with Ciphers
SSL/TLS Client and Server Tests
Handling of S/MIME signed or encrypted mail


Various companies hold various patents for various algorithms in various
locations around the world. _YOU_ are responsible for ensuring that your use
of any algorithms is legal by checking if there are any patents in your
country. The file contains some of the patents that we know about or are
rumoured to exist. This is not a definitive list.

RSA Data Security holds software patents on the RSA and RC5 algorithms. If
their ciphers are used used inside the USA (and Japan?), you must contact RSA
Data Security for licensing conditions. Their web page is

RC4 is a trademark of RSA Data Security, so use of this label should perhaps
only be used with RSA Data Security's permission.

The IDEA algorithm is patented by Ascom in Austria, France, Germany, Italy,
Japan, Netherlands, Spain, Sweden, Switzerland, UK and the USA. They should
be contacted if that algorithm is to be used, their web page is


To install this package under a Unix derivative, read the INSTALL file. For
a Win32 platform, read the INSTALL.W32 file. For OpenVMS systems, read

For people in the USA, it is possible to compile OpenSSL to use RSA Inc.'s
public key library, RSAREF, by configuring OpenSSL with the option "rsaref".

Read the documentation in the doc/ directory. It is quite rough, but it
lists the functions, you will probably have to look at the code to work out
how to used them. Look at the example programs.


If you have any problems with OpenSSL then please take the following steps

- Download the current snapshot from ftp://ftp.openssl.org/snapshot/
to see if the problem has already been addressed
- Remove ASM versions of libraries
- Remove compiler optimisation flags

If you wish to report a bug then please include the following information in
any bug report:

- On Unix systems:
Self-test report generated by 'make report'
- On other systems:
OpenSSL version: output of 'openssl version -a'
OS Name, Version, Hardware platform
Compiler Details (name, version)
- Application Details (name, version)
- Problem Description (steps that will reproduce the problem, if known)
- Stack Traceback (if the application dumps core)

Report the bug to the OpenSSL project at:


Note that mail to openssl-bugs@openssl.org is forwarded to a public
mailing list. Confidential mail may be sent to openssl-security@openssl.org
(PGP key available from the key servers).


Development is coordinated on the openssl-dev mailing list (see
http://www.openssl.org for information on subscribing). If you
would like to submit a patch, send it to openssl-dev@openssl.org with
the string "[PATCH]" in the subject. Please be sure to include a
textual explanation of what your patch does.

The preferred format for changes is "diff -u" output. You might
generate it like this:

# cd openssl-work
# [your changes]
# ./Configure dist; make clean
# cd ..
# diff -urN openssl-orig openssl-work > mydiffs.patch