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|
OPENSSL INSTALLATION
--------------------
This document describes installation on all supported operating
systems (the Linux/Unix family, OpenVMS and Windows)
To install OpenSSL, you will need:
* A make implementation
* Perl 5 with core modules (please read NOTES.PERL)
* The perl module Text::Template (please read NOTES.PERL)
* an ANSI C compiler
* a development environment in the form of development libraries and C
header files
* a supported operating system
For additional platform specific requirements, solutions to specific
issues and other details, please read one of these:
* NOTES.VMS (OpenVMS)
* NOTES.WIN (any supported Windows)
* NOTES.DJGPP (DOS platform with DJGPP)
Notational conventions in this document
---------------------------------------
Throughout this document, we use the following conventions in command
examples:
$ command Any line starting with a dollar sign
($) is a command line.
{ word1 | word2 | word3 } This denotes a mandatory choice, to be
replaced with one of the given words.
A simple example would be this:
$ echo { FOO | BAR | COOKIE }
which is to be understood as one of
these:
$ echo FOO
- or -
$ echo BAR
- or -
$ echo COOKIE
[ word1 | word2 | word3 ] Similar to { word1 | word2 | word3 }
except it's optional to give any of
those. In addition to the examples
above, this would also be valid:
$ echo
{{ target }} This denotes a mandatory word or
sequence of words of some sort. A
simple example would be this:
$ type {{ filename }}
which is to be understood to use the
command 'type' on some file name
determined by the user.
[[ options ]] Similar to {{ target }}, but is
optional.
Note that the notation assumes spaces around {, }, [, ], {{, }} and
[[, ]]. This is to differentiate from OpenVMS directory
specifications, which also use [ and ], but without spaces.
Quick Start
-----------
If you want to just get on with it, do:
on Unix:
$ ./config
$ make
$ make test
$ make install
on OpenVMS:
$ @config
$ mms
$ mms test
$ mms install
on Windows (only pick one of the targets for configuration):
$ perl Configure { VC-WIN32 | VC-WIN64A | VC-WIN64I | VC-CE }
$ nmake
$ nmake test
$ nmake install
If any of these steps fails, see section Installation in Detail below.
This will build and install OpenSSL in the default location, which is:
Unix: normal installation directories under /usr/local
OpenVMS: SYS$COMMON:[OPENSSL-'version'...], where 'version' is the
OpenSSL version number with underscores instead of periods.
Windows: C:\Program Files\OpenSSL or C:\Program Files (x86)\OpenSSL
If you want to install it anywhere else, run config like this:
On Unix:
$ ./config --prefix=/opt/openssl --openssldir=/usr/local/ssl
On OpenVMS:
$ @config --prefix=PROGRAM:[INSTALLS] --openssldir=SYS$MANAGER:[OPENSSL]
Configuration Options
---------------------
There are several options to ./config (or ./Configure) to customize
the build (note that for Windows, the defaults for --prefix and
--openssldir depend in what configuration is used and what Windows
implementation OpenSSL is built on. More notes on this in NOTES.WIN):
--api=x.y.z
Don't build with support for deprecated APIs below the
specified version number. For example "--api=1.1.0" will
remove support for all APIS that were deprecated in OpenSSL
version 1.1.0 or below.
--cross-compile-prefix=PREFIX
The PREFIX to include in front of commands for your
toolchain. It's likely to have to end with dash, e.g.
a-b-c- would invoke GNU compiler as a-b-c-gcc, etc.
Unfortunately cross-compiling is too case-specific to
put together one-size-fits-all instructions. You might
have to pass more flags or set up environment variables
to actually make it work. Android and iOS cases are
discussed in corresponding Configurations/10-main.cf
sections. But there are cases when this option alone is
sufficient. For example to build the mingw64 target on
Linux "--cross-compile-prefix=x86_64-w64-mingw32-"
works. Naturally provided that mingw packages are
installed. Today Debian and Ubuntu users have option to
install a number of prepackaged cross-compilers along
with corresponding run-time and development packages for
"alien" hardware. To give another example
"--cross-compile-prefix=mipsel-linux-gnu-" suffices
in such case. Needless to mention that you have to
invoke ./Configure, not ./config, and pass your target
name explicitly.
--debug
Build OpenSSL with debugging symbols.
--libdir=DIR
The name of the directory under the top of the installation
directory tree (see the --prefix option) where libraries will
be installed. By default this is "lib". Note that on Windows
only ".lib" files will be stored in this location. dll files
will always be installed to the "bin" directory.
--openssldir=DIR
Directory for OpenSSL configuration files, and also the
default certificate and key store. Defaults are:
Unix: /usr/local/ssl
Windows: C:\Program Files\Common Files\SSL
or C:\Program Files (x86)\Common Files\SSL
OpenVMS: SYS$COMMON:[OPENSSL-COMMON]
--prefix=DIR
The top of the installation directory tree. Defaults are:
Unix: /usr/local
Windows: C:\Program Files\OpenSSL
or C:\Program Files (x86)\OpenSSL
OpenVMS: SYS$COMMON:[OPENSSL-'version']
--release
Build OpenSSL without debugging symbols. This is the default.
--strict-warnings
This is a developer flag that switches on various compiler
options recommended for OpenSSL development. It only works
when using gcc or clang as the compiler. If you are
developing a patch for OpenSSL then it is recommended that
you use this option where possible.
--with-zlib-include=DIR
The directory for the location of the zlib include file. This
option is only necessary if enable-zlib (see below) is used
and the include file is not already on the system include
path.
--with-zlib-lib=LIB
On Unix: this is the directory containing the zlib library.
If not provided the system library path will be used.
On Windows: this is the filename of the zlib library (with or
without a path). This flag must be provided if the
zlib-dynamic option is not also used. If zlib-dynamic is used
then this flag is optional and a default value ("ZLIB1") is
used if not provided.
On VMS: this is the filename of the zlib library (with or
without a path). This flag is optional and if not provided
then "GNV$LIBZSHR", "GNV$LIBZSHR32" or "GNV$LIBZSHR64" is
used by default depending on the pointer size chosen.
no-afalgeng
Don't build the AFALG engine. This option will be forced if
on a platform that does not support AFALG.
enable-asan
Build with the Address sanitiser. This is a developer option
only. It may not work on all platforms and should never be
used in production environments. It will only work when used
with gcc or clang and should be used in conjunction with the
no-shared option.
no-asm
Do not use assembler code. On some platforms a small amount
of assembler code may still be used.
no-async
Do not build support for async operations.
no-autoalginit
Don't automatically load all supported ciphers and digests.
Typically OpenSSL will make available all of its supported
ciphers and digests. For a statically linked application this
may be undesirable if small executable size is an objective.
This only affects libcrypto. Ciphers and digests will have to
be loaded manually using EVP_add_cipher() and
EVP_add_digest() if this option is used. This option will
force a non-shared build.
no-autoerrinit
Don't automatically load all libcrypto/libssl error strings.
Typically OpenSSL will automatically load human readable
error strings. For a statically linked application this may
be undesirable if small executable size is an objective.
no-capieng
Don't build the CAPI engine. This option will be forced if
on a platform that does not support CAPI.
no-cms
Don't build support for CMS features
no-comp
Don't build support for SSL/TLS compression. If this option
is left enabled (the default), then compression will only
work if the zlib or zlib-dynamic options are also chosen.
enable-crypto-mdebug
Build support for debugging memory allocated via
OPENSSL_malloc() or OPENSSL_zalloc().
enable-crypto-mdebug-backtrace
As for crypto-mdebug, but additionally provide backtrace
information for allocated memory.
TO BE USED WITH CARE: this uses GNU C functionality, and
is therefore not usable for non-GNU config targets. If
your build complains about the use of '-rdynamic' or the
lack of header file execinfo.h, this option is not for you.
ALSO NOTE that even though execinfo.h is available on your
system (through Gnulib), the functions might just be stubs
that do nothing.
no-ct
Don't build support for Certificate Transparency.
no-deprecated
Don't build with support for any deprecated APIs. This is the
same as using "--api" and supplying the latest version
number.
no-dgram
Don't build support for datagram based BIOs. Selecting this
option will also force the disabling of DTLS.
no-dso
Don't build support for loading Dynamic Shared Objects.
no-dynamic-engine
Don't build the dynamically loaded engines. This only has an
effect in a "shared" build
no-ec
Don't build support for Elliptic Curves.
no-ec2m
Don't build support for binary Elliptic Curves
enable-ec_nistp_64_gcc_128
Enable support for optimised implementations of some commonly
used NIST elliptic curves. This is only supported on some
platforms.
enable-egd
Build support for gathering entropy from EGD (Entropy
Gathering Daemon).
no-engine
Don't build support for loading engines.
no-err
Don't compile in any error strings.
enable-external-tests
Enable building of integration with external test suites.
This is a developer option and may not work on all platforms.
The only supported external test suite at the current time is
the BoringSSL test suite. See the file test/README.external
for further details.
no-filenames
Don't compile in filename and line number information (e.g.
for errors and memory allocation).
enable-fuzz-libfuzzer, enable-fuzz-afl
Build with support for fuzzing using either libfuzzer or AFL.
These are developer options only. They may not work on all
platforms and should never be used in production environments.
See the file fuzz/README.md for further details.
no-gost
Don't build support for GOST based ciphersuites. Note that
if this feature is enabled then GOST ciphersuites are only
available if the GOST algorithms are also available through
loading an externally supplied engine.
enable-heartbeats
Build support for DTLS heartbeats.
no-hw-padlock
Don't build the padlock engine.
no-makedepend
Don't generate dependencies.
no-multiblock
Don't build support for writing multiple records in one
go in libssl (Note: this is a different capability to the
pipelining functionality).
no-nextprotoneg
Don't build support for the NPN TLS extension.
no-ocsp
Don't build support for OCSP.
no-pic
Don't build with support for Position Independent Code.
no-posix-io
Don't use POSIX IO capabilities.
no-psk
Don't build support for Pre-Shared Key based ciphersuites.
no-rdrand
Don't use hardware RDRAND capabilities.
no-rfc3779
Don't build support for RFC3779 ("X.509 Extensions for IP
Addresses and AS Identifiers")
sctp
Build support for SCTP
no-shared
Do not create shared libraries, only static ones. See "Note
on shared libraries" below.
no-sock
Don't build support for socket BIOs
no-srp
Don't build support for SRP or SRP based ciphersuites.
no-srtp
Don't build SRTP support
no-sse2
Exclude SSE2 code paths. Normally SSE2 extension is
detected at run-time, but the decision whether or not the
machine code will be executed is taken solely on CPU
capability vector. This means that if you happen to run OS
kernel which does not support SSE2 extension on Intel P4
processor, then your application might be exposed to
"illegal instruction" exception. There might be a way
to enable support in kernel, e.g. FreeBSD kernel can be
compiled with CPU_ENABLE_SSE, and there is a way to
disengage SSE2 code paths upon application start-up,
but if you aim for wider "audience" running such kernel,
consider no-sse2. Both the 386 and no-asm options imply
no-sse2.
enable-ssl-trace
Build with the SSL Trace capabilities (adds the "-trace"
option to s_client and s_server).
no-static-engine
Don't build the statically linked engines. This only
has an impact when not built "shared".
no-stdio
Don't use any C "stdio" features. Only libcrypto and libssl
can be built in this way. Using this option will suppress
building the command line applications. Additionally since
the OpenSSL tests also use the command line applications the
tests will also be skipped.
no-threads
Don't try to build with support for multi-threaded
applications.
threads
Build with support for multi-threaded applications. Most
platforms will enable this by default. However if on a
platform where this is not the case then this will usually
require additional system-dependent options! See "Note on
multi-threading" below.
no-ts
Don't build Time Stamping Authority support.
enable-ubsan
Build with the Undefined Behaviour sanitiser. This is a
developer option only. It may not work on all platforms and
should never be used in production environments. It will only
work when used with gcc or clang and should be used in
conjunction with the "-DPEDANTIC" option (or the
--strict-warnings option).
no-ui
Don't build with the "UI" capability (i.e. the set of
features enabling text based prompts).
enable-unit-test
Enable additional unit test APIs. This should not typically
be used in production deployments.
enable-weak-ssl-ciphers
Build support for SSL/TLS ciphers that are considered "weak"
(e.g. RC4 based ciphersuites).
zlib
Build with support for zlib compression/decompression.
zlib-dynamic
Like "zlib", but has OpenSSL load the zlib library
dynamically when needed. This is only supported on systems
where loading of shared libraries is supported.
386
On Intel hardware, use the 80386 instruction set only
(the default x86 code is more efficient, but requires at
least a 486). Note: Use compiler flags for any other CPU
specific configuration, e.g. "-m32" to build x86 code on
an x64 system.
enable-tls1_3
TODO(TLS1.3): Make this enabled by default
Build support for TLS1.3. Note: This is a WIP feature and
does not currently interoperate with other TLS1.3
implementations! Use with caution!!
no-<prot>
Don't build support for negotiating the specified SSL/TLS
protocol (one of ssl, ssl3, tls, tls1, tls1_1, tls1_2, dtls,
dtls1 or dtls1_2). If "no-tls" is selected then all of tls1,
tls1_1 and tls1_2 are disabled. Similarly "no-dtls" will
disable dtls1 and dtls1_2. The "no-ssl" option is synonymous
with "no-ssl3". Note this only affects version negotiation.
OpenSSL will still provide the methods for applications to
explicitly select the individual protocol versions.
no-<prot>-method
As for no-<prot> but in addition do not build the methods for
applications to explicitly select individual protocol
versions.
enable-<alg>
Build with support for the specified algorithm, where <alg>
is one of: md2 or rc5.
no-<alg>
Build without support for the specified algorithm, where
<alg> is one of: bf, blake2, camellia, cast, chacha, cmac,
des, dh, dsa, ecdh, ecdsa, idea, md4, mdc2, ocb, poly1305,
rc2, rc4, rmd160, scrypt, seed or whirlpool. The "ripemd"
algorithm is deprecated and if used is synonymous with rmd160.
-Dxxx, -lxxx, -Lxxx, -fxxx, -mXXX, -Kxxx
These system specific options will be passed through to the
compiler to allow you to define preprocessor symbols, specify
|