cc4ea5e000
Create a new hashtable that is more efficient than the existing LHASH_OF implementation. the new ossl_ht api offers several new features that improve performance opportunistically * A more generalized hash function. Currently using fnv1a, provides a more general hash function, but can still be overridden where needed * Improved locking and reference counting. This hash table is internally locked with an RCU lock, and optionally reference counts elements, allowing for users to not have to create and manage their own read/write locks * Lockless operation. The hash table can be configured to operate locklessly on the read side, improving performance, at the sacrifice of the ability to grow the hash table or delete elements from it * A filter function allowing for the retrieval of several elements at a time matching a given criteria without having to hold a lock permanently * a doall_until iterator variant, that allows callers which need to iterate over the entire hash table until a given condition is met (as defined by the return value of the iterator callback). This allows for callers attempting to do expensive cache searches for a small number of elements to terminate the iteration early, saving cpu cycles * Dynamic type safety. The hash table provides operations to set and get data of a specific type without having to define a type at the instatiation point * Multiple data type storage. The hash table can store multiple data types allowing for more flexible usage * Ubsan safety. Because the API deals with concrete single types (HT_KEY and HT_VALUE), leaving specific type casting to the call recipient with dynamic type validation, this implementation is safe from the ubsan undefined behavior warnings that require additional thunking on callbacks. Testing of this new hashtable with an equivalent hash function, I can observe approximately a 6% performance improvement in the lhash_test Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/23671) |
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| Configurations | ||
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| cloudflare-quiche@7ab6a55cfe | ||
| crypto | ||
| demos | ||
| dev | ||
| doc | ||
| engines | ||
| exporters | ||
| external/perl | ||
| fuzz | ||
| gost-engine@ede3886cc5 | ||
| include | ||
| krb5@aa9b4a2a64 | ||
| ms | ||
| oqs-provider@8c746d7e29 | ||
| os-dep | ||
| providers | ||
| pyca-cryptography@7e33b0e773 | ||
| python-ecdsa@4de8d5bf89 | ||
| ssl | ||
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| tlsfuzzer@dbd56c1490 | ||
| tlslite-ng@771e9f59d6 | ||
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| wycheproof@2196000605 | ||
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| ACKNOWLEDGEMENTS.md | ||
| AUTHORS.md | ||
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| CONTRIBUTING.md | ||
| Configure | ||
| HACKING.md | ||
| INSTALL.md | ||
| LICENSE.txt | ||
| NEWS.md | ||
| NOTES-ANDROID.md | ||
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| README-ENGINES.md | ||
| README-FIPS.md | ||
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| README-QUIC.md | ||
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README.md
Welcome to the OpenSSL Project
OpenSSL is a robust, commercial-grade, full-featured Open Source Toolkit for the TLS (formerly SSL), DTLS and QUIC (currently client side only) protocols.
The protocol implementations are based on a full-strength general purpose cryptographic library, which can also be used stand-alone. Also included is a cryptographic module validated to conform with FIPS standards.
OpenSSL is descended from the SSLeay library developed by Eric A. Young and Tim J. Hudson.
The official Home Page of the OpenSSL Project is www.openssl.org.
Table of Contents
Overview
The OpenSSL toolkit includes:
-
libssl an implementation of all TLS protocol versions up to TLSv1.3 (RFC 8446), DTLS protocol versions up to DTLSv1.2 (RFC 6347) and the QUIC (currently client side only) version 1 protocol (RFC 9000).
-
libcrypto a full-strength general purpose cryptographic library. It constitutes the basis of the TLS implementation, but can also be used independently.
-
openssl the OpenSSL command line tool, a swiss army knife for cryptographic tasks, testing and analyzing. It can be used for
- creation of key parameters
- creation of X.509 certificates, CSRs and CRLs
- calculation of message digests
- encryption and decryption
- SSL/TLS/DTLS and client and server tests
- QUIC client tests
- handling of S/MIME signed or encrypted mail
- and more...
Download
For Production Use
Source code tarballs of the official releases can be downloaded from www.openssl.org/source. The OpenSSL project does not distribute the toolkit in binary form.
However, for a large variety of operating systems precompiled versions of the OpenSSL toolkit are available. In particular, on Linux and other Unix operating systems, it is normally recommended to link against the precompiled shared libraries provided by the distributor or vendor.
We also maintain a list of third parties that produce OpenSSL binaries for various Operating Systems (including Windows) on the Binaries page on our wiki.
For Testing and Development
Although testing and development could in theory also be done using the source tarballs, having a local copy of the git repository with the entire project history gives you much more insight into the code base.
The official OpenSSL Git Repository is located at git.openssl.org. There is a GitHub mirror of the repository at github.com/openssl/openssl, which is updated automatically from the former on every commit.
A local copy of the Git Repository can be obtained by cloning it from the original OpenSSL repository using
git clone git://git.openssl.org/openssl.git
or from the GitHub mirror using
git clone https://github.com/openssl/openssl.git
If you intend to contribute to OpenSSL, either to fix bugs or contribute new features, you need to fork the OpenSSL repository openssl/openssl on GitHub and clone your public fork instead.
git clone https://github.com/yourname/openssl.git
This is necessary because all development of OpenSSL nowadays is done via GitHub pull requests. For more details, see Contributing.
Build and Install
After obtaining the Source, have a look at the INSTALL file for detailed instructions about building and installing OpenSSL. For some platforms, the installation instructions are amended by a platform specific document.
- Notes for UNIX-like platforms
- Notes for Android platforms
- Notes for Windows platforms
- Notes for the DOS platform with DJGPP
- Notes for the OpenVMS platform
- Notes on Perl
- Notes on Valgrind
Specific notes on upgrading to OpenSSL 3.x from previous versions can be found in the ossl-guide-migration(7ossl) manual page.
Documentation
README Files
There are some README.md files in the top level of the source distribution containing additional information on specific topics.
- Information about the OpenSSL QUIC protocol implementation
- Information about the OpenSSL Provider architecture
- Information about using the OpenSSL FIPS validated module
- Information about the legacy OpenSSL Engine architecture
The OpenSSL Guide
There are some tutorial and introductory pages on some important OpenSSL topics within the OpenSSL Guide.
Manual Pages
The manual pages for the master branch and all current stable releases are available online.
Demos
The are numerous source code demos for using various OpenSSL capabilities in the demos subfolder.
Wiki
There is a Wiki at wiki.openssl.org which is currently not very active. It contains a lot of useful information, not all of which is up-to-date.
License
OpenSSL is licensed under the Apache License 2.0, which means that you are free to get and use it for commercial and non-commercial purposes as long as you fulfill its conditions.
See the LICENSE.txt file for more details.
Support
There are various ways to get in touch. The correct channel depends on your requirement. See the SUPPORT file for more details.
Contributing
If you are interested and willing to contribute to the OpenSSL project, please take a look at the CONTRIBUTING file.
Legalities
A number of nations restrict the use or export of cryptography. If you are potentially subject to such restrictions, you should seek legal advice before attempting to develop or distribute cryptographic code.
Copyright
Copyright (c) 1998-2024 The OpenSSL Project Authors
Copyright (c) 1995-1998 Eric A. Young, Tim J. Hudson
All rights reserved.