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0 parents commit afd56985cea5e3f7d5affc7b43a9a7d084fc7c24 Martin Dietze committed Dec 4, 2011
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2,094 Configure

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965 FAQ

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350 INSTALL
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+
+ INSTALLATION ON THE UNIX PLATFORM
+ ---------------------------------
+
+ [Installation on DOS (with djgpp), Windows, OpenVMS, MacOS (before MacOS X)
+ and NetWare is described in INSTALL.DJGPP, INSTALL.W32, INSTALL.VMS,
+ INSTALL.MacOS and INSTALL.NW.
+
+ This document describes installation on operating systems in the Unix
+ family.]
+
+ To install OpenSSL, you will need:
+
+ * make
+ * Perl 5
+ * an ANSI C compiler
+ * a development environment in form of development libraries and C
+ header files
+ * a supported Unix operating system
+
+ Quick Start
+ -----------
+
+ If you want to just get on with it, do:
+
+ $ ./config
+ $ make
+ $ make test
+ $ make 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 (for
+ historical reasons) /usr/local/ssl. If you want to install it anywhere else,
+ run config like this:
+
+ $ ./config --prefix=/usr/local --openssldir=/usr/local/openssl
+
+
+ Configuration Options
+ ---------------------
+
+ There are several options to ./config (or ./Configure) to customize
+ the build:
+
+ --prefix=DIR Install in DIR/bin, DIR/lib, DIR/include/openssl.
+ Configuration files used by OpenSSL will be in DIR/ssl
+ or the directory specified by --openssldir.
+
+ --openssldir=DIR Directory for OpenSSL files. If no prefix is specified,
+ the library files and binaries are also installed there.
+
+ no-threads Don't try to build with support for multi-threaded
+ applications.
+
+ threads Build with support for multi-threaded applications.
+ This will usually require additional system-dependent options!
+ See "Note on multi-threading" below.
+
+ no-zlib Don't try to build with support for zlib compression and
+ decompression.
+
+ 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. This is the default choice.
+
+ no-shared Don't try to create shared libraries.
+
+ shared In addition to the usual static libraries, create shared
+ libraries on platforms where it's supported. See "Note on
+ shared libraries" below.
+
+ no-asm Do not use assembler code.
+
+ 386 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.
+
+ no-sse2 Exclude SSE2 code pathes. Normally SSE2 extention 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 pathes upon application start-up,
+ but if you aim for wider "audience" running such kernel,
+ consider no-sse2. Both 386 and no-asm options above imply
+ no-sse2.
+
+ no-<cipher> Build without the specified cipher (bf, cast, des, dh, dsa,
+ hmac, md2, md5, mdc2, rc2, rc4, rc5, rsa, sha).
+ The crypto/<cipher> directory can be removed after running
+ "make depend".
+
+ -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 additional libraries,
+ library directories or other compiler options.
+
+
+ Installation in Detail
+ ----------------------
+
+ 1a. Configure OpenSSL for your operation system automatically:
+
+ $ ./config [options]
+
+ This guesses at your operating system (and compiler, if necessary) and
+ configures OpenSSL based on this guess. Run ./config -t to see
+ if it guessed correctly. If you want to use a different compiler, you
+ are cross-compiling for another platform, or the ./config guess was
+ wrong for other reasons, go to step 1b. Otherwise go to step 2.
+
+ On some systems, you can include debugging information as follows:
+
+ $ ./config -d [options]
+
+ 1b. Configure OpenSSL for your operating system manually
+
+ OpenSSL knows about a range of different operating system, hardware and
+ compiler combinations. To see the ones it knows about, run
+
+ $ ./Configure
+
+ Pick a suitable name from the list that matches your system. For most
+ operating systems there is a choice between using "cc" or "gcc". When
+ you have identified your system (and if necessary compiler) use this name
+ as the argument to ./Configure. For example, a "linux-elf" user would
+ run:
+
+ $ ./Configure linux-elf [options]
+
+ If your system is not available, you will have to edit the Configure
+ program and add the correct configuration for your system. The
+ generic configurations "cc" or "gcc" should usually work on 32 bit
+ systems.
+
+ Configure creates the file Makefile.ssl from Makefile.org and
+ defines various macros in crypto/opensslconf.h (generated from
+ crypto/opensslconf.h.in).
+
+ 2. Build OpenSSL by running:
+
+ $ make
+
+ This will build the OpenSSL libraries (libcrypto.a and libssl.a) and the
+ OpenSSL binary ("openssl"). The libraries will be built in the top-level
+ directory, and the binary will be in the "apps" directory.
+
+ If "make" fails, look at the output. There may be reasons for
+ the failure that aren't problems in OpenSSL itself (like missing
+ standard headers). If it is a problem with OpenSSL itself, please
+ report the problem to <openssl-bugs@openssl.org> (note that your
+ message will be recorded in the request tracker publicly readable
+ via http://www.openssl.org/support/rt.html and will be forwarded to a
+ public mailing list). Include the output of "make report" in your message.
+ Please check out the request tracker. Maybe the bug was already
+ reported or has already been fixed.
+
+ [If you encounter assembler error messages, try the "no-asm"
+ configuration option as an immediate fix.]
+
+ Compiling parts of OpenSSL with gcc and others with the system
+ compiler will result in unresolved symbols on some systems.
+
+ 3. After a successful build, the libraries should be tested. Run:
+
+ $ make test
+
+ If a test fails, look at the output. There may be reasons for
+ the failure that isn't a problem in OpenSSL itself (like a missing
+ or malfunctioning bc). If it is a problem with OpenSSL itself,
+ try removing any compiler optimization flags from the CFLAG line
+ in Makefile.ssl and run "make clean; make". Please send a bug
+ report to <openssl-bugs@openssl.org>, including the output of
+ "make report" in order to be added to the request tracker at
+ http://www.openssl.org/support/rt.html.
+
+ 4. If everything tests ok, install OpenSSL with
+
+ $ make install
+
+ This will create the installation directory (if it does not exist) and
+ then the following subdirectories:
+
+ certs Initially empty, this is the default location
+ for certificate files.
+ man/man1 Manual pages for the 'openssl' command line tool
+ man/man3 Manual pages for the libraries (very incomplete)
+ misc Various scripts.
+ private Initially empty, this is the default location
+ for private key files.
+
+ If you didn't choose a different installation prefix, the
+ following additional subdirectories will be created:
+
+ bin Contains the openssl binary and a few other
+ utility programs.
+ include/openssl Contains the header files needed if you want to
+ compile programs with libcrypto or libssl.
+ lib Contains the OpenSSL library files themselves.
+
+ Package builders who want to configure the library for standard
+ locations, but have the package installed somewhere else so that
+ it can easily be packaged, can use
+
+ $ make INSTALL_PREFIX=/tmp/package-root install
+
+ (or specify "--install_prefix=/tmp/package-root" as a configure
+ option). The specified prefix will be prepended to all
+ installation target filenames.
+
+
+ NOTE: The header files used to reside directly in the include
+ directory, but have now been moved to include/openssl so that
+ OpenSSL can co-exist with other libraries which use some of the
+ same filenames. This means that applications that use OpenSSL
+ should now use C preprocessor directives of the form
+
+ #include <openssl/ssl.h>
+
+ instead of "#include <ssl.h>", which was used with library versions
+ up to OpenSSL 0.9.2b.
+
+ If you install a new version of OpenSSL over an old library version,
+ you should delete the old header files in the include directory.
+
+ Compatibility issues:
+
+ * COMPILING existing applications
+
+ To compile an application that uses old filenames -- e.g.
+ "#include <ssl.h>" --, it will usually be enough to find
+ the CFLAGS definition in the application's Makefile and
+ add a C option such as
+
+ -I/usr/local/ssl/include/openssl
+
+ to it.
+
+ But don't delete the existing -I option that points to
+ the ..../include directory! Otherwise, OpenSSL header files
+ could not #include each other.
+
+ * WRITING applications
+
+ To write an application that is able to handle both the new
+ and the old directory layout, so that it can still be compiled
+ with library versions up to OpenSSL 0.9.2b without bothering
+ the user, you can proceed as follows:
+
+ - Always use the new filename of OpenSSL header files,
+ e.g. #include <openssl/ssl.h>.
+
+ - Create a directory "incl" that contains only a symbolic
+ link named "openssl", which points to the "include" directory
+ of OpenSSL.
+ For example, your application's Makefile might contain the
+ following rule, if OPENSSLDIR is a pathname (absolute or
+ relative) of the directory where OpenSSL resides:
+
+ incl/openssl:
+ -mkdir incl
+ cd $(OPENSSLDIR) # Check whether the directory really exists
+ -ln -s `cd $(OPENSSLDIR); pwd`/include incl/openssl
+
+ You will have to add "incl/openssl" to the dependencies
+ of those C files that include some OpenSSL header file.
+
+ - Add "-Iincl" to your CFLAGS.
+
+ With these additions, the OpenSSL header files will be available
+ under both name variants if an old library version is used:
+ Your application can reach them under names like <openssl/foo.h>,
+ while the header files still are able to #include each other
+ with names of the form <foo.h>.
+
+
+ Note on multi-threading
+ -----------------------
+
+ For some systems, the OpenSSL Configure script knows what compiler options
+ are needed to generate a library that is suitable for multi-threaded
+ applications. On these systems, support for multi-threading is enabled
+ by default; use the "no-threads" option to disable (this should never be
+ necessary).
+
+ On other systems, to enable support for multi-threading, you will have
+ to specify at least two options: "threads", and a system-dependent option.
+ (The latter is "-D_REENTRANT" on various systems.) The default in this
+ case, obviously, is not to include support for multi-threading (but
+ you can still use "no-threads" to suppress an annoying warning message
+ from the Configure script.)
+
+
+ Note on shared libraries
+ ------------------------
+
+ Shared libraries have certain caveats. Binary backward compatibility
+ can't be guaranteed before OpenSSL version 1.0. The only reason to
+ use them would be to conserve memory on systems where several programs
+ are using OpenSSL.
+
+ For some systems, the OpenSSL Configure script knows what is needed to
+ build shared libraries for libcrypto and libssl. On these systems,
+ the shared libraries are currently not created by default, but giving
+ the option "shared" will get them created. This method supports Makefile
+ targets for shared library creation, like linux-shared. Those targets
+ can currently be used on their own just as well, but this is expected
+ to change in future versions of OpenSSL.
+
+ Note on random number generation
+ --------------------------------
+
+ Availability of cryptographically secure random numbers is required for
+ secret key generation. OpenSSL provides several options to seed the
+ internal PRNG. If not properly seeded, the internal PRNG will refuse
+ to deliver random bytes and a "PRNG not seeded error" will occur.
+ On systems without /dev/urandom (or similar) device, it may be necessary
+ to install additional support software to obtain random seed.
+ Please check out the manual pages for RAND_add(), RAND_bytes(), RAND_egd(),
+ and the FAQ for more information.
+
+ Note on support for multiple builds
+ -----------------------------------
+
+ OpenSSL is usually built in its source tree. Unfortunately, this doesn't
+ support building for multiple platforms from the same source tree very well.
+ It is however possible to build in a separate tree through the use of lots
+ of symbolic links, which should be prepared like this:
+
+ mkdir -p objtree/"`uname -s`-`uname -r`-`uname -m`"
+ cd objtree/"`uname -s`-`uname -r`-`uname -m`"
+ (cd $OPENSSL_SOURCE; find . -type f) | while read F; do
+ mkdir -p `dirname $F`
+ rm -f $F; ln -s $OPENSSL_SOURCE/$F $F
+ echo $F '->' $OPENSSL_SOURCE/$F
+ done
+ make -f Makefile.org clean
+
+ OPENSSL_SOURCE is an environment variable that contains the absolute (this
+ is important!) path to the OpenSSL source tree.
+
+ Also, operations like 'make update' should still be made in the source tree.
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+
+
+ INSTALLATION ON THE DOS PLATFORM WITH DJGPP
+ -------------------------------------------
+
+ OpenSSL has been ported to DJGPP, a Unix look-alike 32-bit run-time
+ environment for 16-bit DOS, but only with long filename support.
+ If you wish to compile on native DOS with 8+3 filenames, you will
+ have to tweak the installation yourself, including renaming files
+ with illegal or duplicate names.
+
+ You should have a full DJGPP environment installed, including the
+ latest versions of DJGPP, GCC, BINUTILS, BASH, etc. This package
+ requires that PERL and BC also be installed.
+
+ All of these can be obtained from the usual DJGPP mirror sites or
+ directly at "http://www.delorie.com/pub/djgpp". For help on which
+ files to download, see the DJGPP "ZIP PICKER" page at
+ "http://www.delorie.com/djgpp/zip-picker.html". You also need to have
+ the WATT-32 networking package installed before you try to compile
+ OpenSSL. This can be obtained from "http://www.bgnett.no/~giva/".
+ The Makefile assumes that the WATT-32 code is in the directory
+ specified by the environment variable WATT_ROOT. If you have watt-32
+ in directory "watt32" under your main DJGPP directory, specify
+ WATT_ROOT="/dev/env/DJDIR/watt32".
+
+ To compile OpenSSL, start your BASH shell, then configure for DJGPP by
+ running "./Configure" with appropriate arguments:
+
+ ./Configure no-threads --prefix=/dev/env/DJDIR DJGPP
+
+ And finally fire up "make". You may run out of DPMI selectors when
+ running in a DOS box under Windows. If so, just close the BASH
+ shell, go back to Windows, and restart BASH. Then run "make" again.
+
+ RUN-TIME CAVEAT LECTOR
+ --------------
+
+ Quoting FAQ:
+
+ "Cryptographic software needs a source of unpredictable data to work
+ correctly. Many open source operating systems provide a "randomness
+ device" (/dev/urandom or /dev/random) that serves this purpose."
+
+ As of version 0.9.7f DJGPP port checks upon /dev/urandom$ for a 3rd
+ party "randomness" DOS driver. One such driver, NOISE.SYS, can be
+ obtained from "http://www.rahul.net/dkaufman/index.html".
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