SSL/TLS cryptography library Also known as: openssl@1.0
This formula is keg-only.

Current version

Revision: 1

openssl requires the following formula to be installed:
makedepend 1.0.5 Creates dependencies in makefiles

Reverse dependencies

The following formulae require openssl to be installed:
avfs 1.0.2 Virtual file system that facilitates looking inside archives
encfs 1.9.1 Encrypted pass-through FUSE file system
ori 0.8.1_1 Secure distributed file system
s3-backer 1.4.3 FUSE-based single file backing store via Amazon S3
freerdp 1.0.2 X11 implementation of the Remote Desktop Protocol (RDP)
robot-framework 3.0.1 Open source test framework for acceptance testing
x3270 3.5ga9 IBM 3270 terminal emulator for the X Window System and Windows
libewf 20140608_1 Library for support of the Expert Witness Compression Format
tarsnap 1.0.39 Online backups for the truly paranoid
megatools 1.9.98 Command-line client for
libcapn 2.0.0 C library to send push notifications to Apple devices
libexosip 4.1.0_1 Toolkit for eXosip2
libfreefare 0.4.0_1 API for MIFARE card manipulations
liboauth 1.0.3_1 C library for the OAuth Core RFC 5849 standard
libopkele 2.0.4_1 C++ implementation of OpenID decentralized identity system
gloox 1.0.20 C++ Jabber/XMPP library that handles the low-level protocol
monkeysphere 0.41 Use the OpenPGP web of trust to verify ssh connections
lynx 2.8.8rel.2_1 Text-based web browser
rabbitmq-c 0.8.0 RabbitMQ C client
fetchmail 6.3.26 Fetch mail from a POP, IMAP, ETRN, or ODMR-capable server
shairport 1.1.1 Airtunes emulator
ekg2 0.3.1_2 Multiplatform, multiprotocol, plugin-based instant messenger
tlsdate 0.0.13 Secure rdate replacement
pwsafe 0.2.0_2 Generate passwords and manage encrypted password databases
ngircd 24 Next generation IRC daemon
ettercap 0.8.2_1 Multipurpose sniffer/interceptor/logger for switched LAN
nut 2.7.4 Network UPS Tools: Support for various power devices
opensc 0.17.0 Tools and libraries for smart cards
osslsigncode 1.7.1 Authenticode signing of PE(EXE/SYS/DLL/etc), CAB and MSI files
ldapvi 1.7_3 Update LDAP entries with a text editor
luvit 2.14.2 Asynchronous I/O for Lua
ipmitool 1.8.18_2 Utility for IPMI control with kernel driver or LAN interface
kore 2.0.0 Web application framework for writing web APIs in C
frag_find 1.0.0_1 Hash-based carver tool (formerly 'NPS Bloom Filter package')
ftimes 3.11.0_1 System baselining and evidence collection tool
x11vnc 0.9.13_1 VNC server for real X displays
xaric 0.13.7 IRC client
csup 20120305_1 Rewrite of CVSup in C
msmtp 1.6.6 SMTP client that can be used as an SMTP plugin for Mutt
avfs 1.0.5 Virtual file system that facilitates looking inside archives
jose 10 C-language implementation of Javascript Object Signing and Encryption
libopendkim 2.10.3 Implementation of Domain Keys Identified Mail authentication
xar-mackyle 1.6.1 eXtensible ARchiver
thc-pptp-bruter 0.1.4 Brute force program against PPTP VPN endpoints (TCP port 1723)
profanity 0.5.1 Console based XMPP client
gpac 0.7.1 Multimedia framework for research and academic purposes
ori 0.8.1_1 Secure distributed file system
ncrack 0.6.0 Network authentication cracking tool
blat 36 Genomic sequence search tool
tcpdump 4.9.2 Command-line packet analyzer
elinks 0.11.7_2 Text mode web browser
erlang@17 Programming language for highly scalable real-time systems
isync 1.3.0 Synchronize a maildir with an IMAP server
libmowgli 2.1.3 Core framework for Atheme applications
libssh 0.7.5 C library SSHv1/SSHv2 client and server protocols
libssh2 1.8.0 C library implementing the SSH2 protocol
makepkg 5.0.2 Compile and build packages suitable for installation with pacman
mysql-cluster 7.5.7 Shared-nothing clustering and auto-sharding for MySQL
pincaster 0.6_1 Nosql database with a HTTP/JSON interface
sblim-sfcc 2.2.8 Project to enhance the manageability of GNU/Linux system
scrypt 1.2.1 Encrypt and decrypt files using memory-hard password function
siege 4.0.4 HTTP regression testing and benchmarking utility
skipfish 2.10b_1 Web application security scanner
mosquitto 1.4.14_2 Message broker implementing the MQTT protocol
bibtexconv 1.1.11 BibTeX file converter
center-im 4.22.10_1 Text-mode multi-protocol instant messaging client
zbackup 1.4.4_6 Globally-deduplicating backup tool (based on ideas in rsync)
lighttpd 1.4.48 Small memory footprint, flexible web-server
opusfile 0.10 API for decoding and seeking in .opus files
opensaml 2.6.1 Library for Security Assertion Markup Language
monit 5.25.1 Manage and monitor processes, files, directories, and devices
nginx-full 1.12.2 HTTP(S) server, reverse proxy, IMAP/POP3 proxy server
slrn 1.0.3a Powerful console-based newsreader
ucsc-genome-browser 338 Mirror of the UCSC Genome Browser
git-crypt 0.6.0 Enable transparent encryption/decryption of files in a git repo
yubico-piv-tool 1.5.0 Command-line tool for the YubiKey NEO PIV applet
mupdf 1.12.0 Lightweight PDF and XPS viewer
h2o 2.2.4 HTTP server with support for HTTP/1.x and HTTP/2
libtins 4.0 C++ network packet sniffing and crafting library
uftp 4.9.5 Secure, reliable, efficient multicast file transfer program
alpine 2.21 News and email agent
nrpe 3.2.1 Nagios remote plugin executor
qca 2.1.3_2 Qt Cryptographic Architecture (QCA)
monitoring-plugins 2.2 Plugins for nagios compatible monitoring systems
pure-ftpd 1.0.47 Secure and efficient FTP server
urweb 20170720 Ur/Web programming language
cfengine 3.11.0 Help manage and understand IT infrastructure
cppcms 1.2.0 Free High Performance Web Development Framework
ttyd 1.4.0 Command-line tool for sharing terminal over the web
heimdal 7.5.0 Free Kerberos 5 implementation
libzdb 3.1_5 Database connection pool library
wrk 4.1.0 HTTP benchmarking tool
mariadb-connector-c 3.0.3 MariaDB database connector for C applications
ldns 1.7.0_1 DNS library written in C
socat netcat on steroids
wget 1.19.4_1 Internet file retriever
w3m 0.5.3_5 Pager/text based browser
mariadb-connector-odbc 3.0.2 Database driver using the industry standard ODBC API
encfs 1.9.4 Encrypted pass-through FUSE file system
wimlib 1.12.0 Library to create, extract, and modify Windows Imaging files
cpprestsdk 2.10.2 C++ libraries for cloud-based client-server communication
sslsplit 0.5.2 Man-in-the-middle attacks against SSL encrypted network connections
exim 4.90.1 Complete replacement for sendmail
swi-prolog 7.6.4 ISO/Edinburgh-style Prolog interpreter
s3-backer 1.4.4 FUSE-based single file backing store via Amazon S3
libav 12.3 Audio and video processing tools
bro 2.5.3 Network security monitor
irssi 1.1.1 Modular IRC client
bareos-client 17.2.5 Client for Bareos (Backup Archiving REcovery Open Sourced)
phantomjs 2.1.1 Headless WebKit scriptable with a JavaScript API
mongodb@3.0 3.0.15 High-performance document-oriented database
libstrophe 0.9.2 XMPP library for C
gwenhywfar 4.20.0 Utility library required by aqbanking and related software
liblacewing 0.5.4_1 Cross-platform, high-level C/C++ networking library
postgresql@9.5 9.5.12 Object-relational database system
postgresql@9.6 9.6.8 Object-relational database system
libpq 10.3 Postgres C API library
postgresql 10.3 Object-relational database system
postgres-xc 1.0.4_1 PostgreSQL cluster based on shared-nothing architecture
telegram-cli 1.3.1_1 Command-line interface for Telegram
radare2 2.4.0 Reverse engineering framework
scamper 20180309 Advanced traceroute and network measurement utility
burp 2.1.30 Network backup and restore
molecule 1.25.1_3 Automated testing for Ansible roles
subversion@1.8 1.8.19 Version control system
nopoll 0.4.6.b400 Open-source C WebSocket toolkit
u-boot-tools 2018.03 Universal boot loader
ansible-lint 3.4.21_1 Checks ansible playbooks for practices and behaviour
sccache 0.2.6 Used as a compiler wrapper and avoids compilation when possible
lastpass-cli 1.3.0 LastPass command-line interface tool
percona-toolkit 3.0.8 Percona Toolkit for MySQL
spdylay 1.4.0_1 Experimental implementation of SPDY protocol versions 2, 3, and 3.1
asdf 0.4.3 Extendable version manager with support for Ruby, Node.js, Erlang & more
libp11 0.2.8_1 PKCS#11 wrapper library in C
pulseaudio 11.1 Sound system for POSIX OSes
duo_unix 1.10.3 Two-factor authentication for SSH
dcmtk 3.6.3 OFFIS DICOM toolkit command-line utilities
gkrellm 2.3.10_1 Extensible GTK system monitoring application
sylpheed 3.7.0_1 Simple, lightweight email-client
httpd 2.4.33 Apache HTTP server
openrct2 0.1.2 Open source re-implementation of RollerCoaster Tycoon 2
neomutt 20180323 E-mail reader with support for Notmuch, NNTP and much more
cnats 1.7.6 C client for the NATS messaging system
httperf 0.9.0_1 Tool for measuring webserver performance
sagittarius-scheme 0.9.1 Free Scheme implementation supporting R6RS and R7RS
libxmlsec1 1.2.25 XML security library
mariadb@10.1 10.1.32 Drop-in replacement for MySQL
librdkafka 0.11.4 The Apache Kafka C/C++ library
ruby 2.5.1 Powerful, clean, object-oriented scripting language
ruby@2.2 2.2.10 Powerful, clean, object-oriented scripting language
tarantool In-memory database and Lua application server
tectonic 0.1.7_3 Modernized, complete, self-contained TeX/LaTeX engine
pdnsrec 4.1.2 Non-authoritative/recursing DNS server
rust 1.25.0 Safe, concurrent, practical language
psqlodbc 10.02.0000 Official PostgreSQL ODBC driver
monetdb 11.29.3 Column-store database
ejabberd 18.03 XMPP application server
xmount 0.7.6 Convert between multiple input & output disk image types
qpid-proton 0.22.0 High-performance, lightweight AMQP 1.0 messaging library
openssh 7.7p1 OpenBSD freely-licensed SSH connectivity tools
unbound 1.7.0 Validating, recursive, caching DNS resolver
passenger 5.2.3 Server for Ruby, Python, and Node.js apps via Apache/NGINX
certbot 0.23.0 Tool to obtain certs from Let's Encrypt and autoenable HTTPS
ssh-permit-a38 0.1.0 Central management and deployment for SSH keys
libcouchbase 2.8.6 C library for Couchbase
ansible@1.9 1.9.6_1 Automate deployment, configuration, and upgrading
duplicity 0.7.17 Bandwidth-efficient encrypted backup
fabric 1.14.0 Library and command-line tool for SSH
node 9.11.1 Platform built on V8 to build network applications
node@6 6.14.1 Platform built on V8 to build network applications
ooniprobe 2.3.0 Network interference detection tool
osc 0.162.1 The command-line interface to work with an Open Build Service
pwntools 3.12.0 CTF framework used by Gallopsled in every CTF
termius 1.2.10 CLI tool for (aka
uwsgi 2.0.17 Full stack for building hosting services
yara 3.7.1 Malware identification and classification tool
robot-framework 3.0.3 Open source test framework for acceptance testing
zabbix 3.4.8 Availability and monitoring solution
srt 1.3.0 Secure Reliable Transport
gst-plugins-bad 1.14.0_1 GStreamer plugins less supported, not fully tested
azure-cli 2.0.31 Microsoft Azure CLI 2.0
gdcm 2.8.6 Grassroots DICOM library and utilities for medical files
saltstack 2018.3.0 Dynamic infrastructure communication bus
conan 1.2.3 Distributed, open source, package manager for C/C++
svtplay-dl 1.9.11 Download videos from
nginx 1.13.12 HTTP(S) server and reverse proxy, and IMAP/POP3 proxy server
grpc 1.11.0 Next generation open source RPC library and framework
asio 1.12.1 Cross-platform C++ Library for asynchronous programming
links 2.15 Lynx-like WWW browser that supports tables, menus, etc.
mutt 1.9.5 Mongrel of mail user agents (part elm, pine, mush, mh, etc.)
poco 1.9.0_1 C++ class libraries for building network and internet-based applications
ykman 0.6.1 Tool for managing your YubiKey configuration
clamav 0.100.0_1 Anti-virus software
mariadb 10.2.14 Drop-in replacement for MySQL
folly 2018.04.16.00_1 Collection of reusable C++ library artifacts developed at Facebook
php@7.1 7.1.16_1 General-purpose scripting language
ansible 2.5.1 Automate deployment, configuration, and upgrading
monero Official monero wallet and cpu miner
mysql@5.5 5.5.60 Open source relational database management system
haproxy 1.8.8 Reliable, high performance TCP/HTTP load balancer
erlang 20.3.4 Programming language for highly scalable real-time systems

Recent formula history

FX Coudert openssl: configure with no-ssl3 no-comp no-zlib
Alex Gaynor openssl 1.0.2o
Mike McQuaid openssl: use *_by_macos.
Alex Gaynor openssl 1.0.2n
Alex Gaynor openssl 1.0.2m

Formula code at GitHub