X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=INSTALL;h=4ce6651b6b3422a549bbb0939f6e1725100fa4c6;hp=3c8548dd3b89104015d654f307d3fad11efead97;hb=56e0f123dc17cb99f50efbae4bbbab77f360818f;hpb=034d55cd5c82517418708a0b41b94f20911774c0 diff --git a/INSTALL b/INSTALL index 3c8548dd3b..4ce6651b6b 100644 --- a/INSTALL +++ b/INSTALL @@ -1,9 +1,9 @@ - OPENSSL INSTALLATION -------------------- This document describes installation on all supported operating - systems (the Linux/Unix family, OpenVMS and Windows) + systems (the Unix/Linux family (which includes Mac OS/X), OpenVMS, + and Windows). To install OpenSSL, you will need: @@ -22,6 +22,7 @@ * NOTES.VMS (OpenVMS) * NOTES.WIN (any supported Windows) * NOTES.DJGPP (DOS platform with DJGPP) + * NOTES.ANDROID (obviously Android [NDK]) Notational conventions in this document --------------------------------------- @@ -76,7 +77,7 @@ If you want to just get on with it, do: - on Unix: + on Unix (again, this includes Mac OS/X): $ ./config $ make @@ -144,8 +145,8 @@ 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 + discussed in corresponding Configurations/15-*.conf + files. 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 @@ -156,10 +157,12 @@ "--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. + name explicitly. Also, note that --openssldir refers + to target's file system, not one you are building on. --debug - Build OpenSSL with debugging symbols. + Build OpenSSL with debugging symbols and zero optimization + level. --libdir=DIR The name of the directory under the top of the installation @@ -208,12 +211,41 @@ 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. + 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. + + --with-rand-seed=seed1[,seed2,...] + A comma separated list of seeding methods which will be tried + by OpenSSL in order to obtain random input (a.k.a "entropy") + for seeding its cryptographically secure random number + generator (CSPRNG). The current seeding methods are: + + os: Use a trusted operating system entropy source. + This is the default method if such an entropy + source exists. + getrandom: Use the L or equivalent system + call. + devrandom: Use the the first device from the DEVRANDOM list + which can be opened to read random bytes. The + DEVRANDOM preprocessor constant expands to + "/dev/urandom","/dev/random","/dev/srandom" on + most unix-ish operating systems. + egd: Check for an entropy generating daemon. + rdcpu: Use the RDSEED or RDRAND command if provided by + the CPU. + librandom: Use librandom (not implemented yet). + none: Disable automatic seeding. This is the default + on some operating systems where no suitable + entropy source exists, or no support for it is + implemented yet. + + For more information, see the section 'Note on random number + generation' at the end of this document. + no-afalgeng Don't build the AFALG engine. This option will be forced if on a platform that does not support AFALG. @@ -226,8 +258,10 @@ no-shared option. no-asm - Do not use assembler code. On some platforms a small amount - of assembler code may still be used. + Do not use assembler code. This should be viewed as + debugging/trouble-shooting option rather than production. + On some platforms a small amount of assembler code may + still be used even with this option. no-async Do not build support for async operations. @@ -248,6 +282,10 @@ error strings. For a statically linked application this may be undesirable if small executable size is an objective. + no-autoload-config + Don't automatically load the default openssl.cnf file. + Typically OpenSSL will automatically load a system config + file which configures default ssl options. no-capieng Don't build the CAPI engine. This option will be forced if @@ -303,8 +341,13 @@ 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. + used NIST elliptic curves. + This is only supported on platforms: + - with little-endian storage of non-byte types + - that tolerate misaligned memory references + - where the compiler: + - supports the non-standard type __uint128_t + - defines the built-in macro __SIZEOF_INT128__ enable-egd Build support for gathering entropy from EGD (Entropy @@ -433,16 +476,6 @@ require additional system-dependent options! See "Note on multi-threading" below. - enable-tls13downgrade - TODO(TLS1.3): Make this enabled by default and remove the - option when TLSv1.3 is out of draft - TLSv1.3 offers a downgrade protection mechanism. This is - implemented but disabled by default. It should not typically - be enabled except for testing purposes. Otherwise this could - cause problems if a pre-RFC version of OpenSSL talks to an - RFC implementation (it will erroneously be detected as a - downgrade). - no-ts Don't build Time Stamping Authority support. @@ -509,9 +542,9 @@ Build without support for the specified algorithm, where is one of: aria, bf, blake2, camellia, cast, chacha, cmac, des, dh, dsa, ecdh, ecdsa, idea, md4, mdc2, ocb, - poly1305, rc2, rc4, rmd160, scrypt, seed, siphash, sm3, sm4 - or whirlpool. The "ripemd" algorithm is deprecated and if - used is synonymous with rmd160. + poly1305, rc2, rc4, rmd160, scrypt, seed, siphash, sm2, sm3, + sm4 or whirlpool. The "ripemd" algorithm is deprecated and + if used is synonymous with rmd160. -Dxxx, -Ixxx, -Wp, -lxxx, -Lxxx, -Wl, -rpath, -R, -framework, -static These system specific options will be recognised and @@ -536,7 +569,7 @@ these flags interact with those variables. VAR=value - Assignment if environment variable for Configure. These + Assignment of environment variable for Configure. These work just like normal environment variable assignments, but are supported on all platforms and are confined to the configuration scripts only. These assignments override @@ -561,12 +594,16 @@ CPPDEFINES List of CPP macro definitions, separated by a platform specific character (':' or space for Unix, ';' for Windows, ',' for - VMS). This can be used in place of -D. + VMS). This can be used instead of using + -D (or what corresponds to that on your + compiler) in CPPFLAGS. CPPINCLUDES List of CPP inclusion directories, separated the same way as for CPPDEFINES. This can - be used in place of -I. + be used instead of -I (or what corresponds + to that on your compiler) in CPPFLAGS. HASHBANGPERL Perl invocation to be inserted after '#!' - in public perl scripts. + in public perl scripts (only relevant on + Unix). LD The program linker (not used on Unix, $(CC) is used there). LDFLAGS Flags for the shared library, DSO and @@ -577,33 +614,33 @@ Windows, and as a comma separated list of libraries on VMS. RANLIB The library archive indexer. - RC The Windows resources manipulator. - RCFLAGS Flags for the Windows reources manipulator. + RC The Windows resource compiler. + RCFLAGS Flags for the Windows resource compiler. RM The command to remove files and directories. - These can be mixed with flags given on the command line. - Any variable assignment resets any corresponding flags - given before it, so for example: + These cannot be mixed with compiling / linking flags given + on the command line. In other words, something like this + isn't permitted. ./config -DFOO CPPFLAGS=-DBAR -DCOOKIE - Will end up having 'CPPFLAGS=-DBAR -DCOOKIE'. + Backward compatibility note: + + To be compatible with older configuration scripts, the + environment variables are ignored if compiling / linking + flags are given on the command line, except for these: - Here is how the flags documented above are collected as - augmentation of these variables: + AR, CC, CXX, CROSS_COMPILE, HASHBANGPERL, PERL, RANLIB, RC + and WINDRES - -Dxxx xxx is collected in CPPDEFINES - -Ixxx xxx is collected in CPPINCLUDES - -Wp,xxx collected in CPPFLAGS - -Lxxx collected in LDFLAGS - -lxxx collected in LDLIBS - -Wp,xxx collected in LDLIBS - -rpath xxx collected in LDLIBS - -R xxx collected in LDLIBS - -framework xxx collected in LDLIBS - -static collected in LDLIBS - -xxx collected in CFLAGS - +xxx collected in CFLAGS + For example, the following command will not see -DBAR: + + CPPFLAGS=-DBAR ./config -DCOOKIE + + However, the following will see both set variables: + + CC=gcc CROSS_COMPILE=x86_64-w64-mingw32- \ + ./config -DCOOKIE reconf reconfigure @@ -805,7 +842,7 @@ $ nmake TESTS='test_rsa test_dsa' test # Windows And of course, you can combine (Unix example shown): - + $ make VERBOSE=1 TESTS='test_rsa test_dsa' test You can find the list of available tests like this: @@ -878,7 +915,7 @@ command symbols. [.SYSTEST] Contains the installation verification procedure. [.HTML] Contains the HTML rendition of the manual pages. - + Additionally, install will add the following directories under OPENSSLDIR (the directory given with --openssldir or its default) @@ -932,7 +969,7 @@ BUILDFILE Use a different build file name than the platform default - ("Makefile" on Unixly platforms, "makefile" on native Windows, + ("Makefile" on Unix-like platforms, "makefile" on native Windows, "descrip.mms" on OpenVMS). This requires that there is a corresponding build file template. See Configurations/README for further information. @@ -1134,7 +1171,7 @@ part of the file name, i.e. for OpenSSL 1.1.x, 1.1 is somehow part of the name. - On most POSIXly platforms, shared libraries are named libcrypto.so.1.1 + On most POSIX platforms, shared libraries are named libcrypto.so.1.1 and libssl.so.1.1. on Cygwin, shared libraries are named cygcrypto-1.1.dll and cygssl-1.1.dll @@ -1159,10 +1196,22 @@ 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 + internal CSPRNG. If not properly seeded, the internal CSPRNG 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 a random seed. - Please check out the manual pages for RAND_add(), RAND_bytes(), RAND_egd(), - and the FAQ for more information. + The seeding method can be configured using the --with-rand-seed option, + which can be used to specify a comma separated list of seed methods. + However in most cases OpenSSL will choose a suitable default method, + so it is not necessary to explicitly provide this option. Note also + that not all methods are available on all platforms. + + I) On operating systems which provide a suitable randomness source (in + form of a system call or system device), OpenSSL will use the optimal + available method to seed the CSPRNG from the operating system's + randomness sources. This corresponds to the option --with-rand-seed=os. + + II) On systems without such a suitable randomness source, automatic seeding + and reseeding is disabled (--with-rand-seed=none) and it may be necessary + to install additional support software to obtain a random seed and reseed + the CSPRNG manually. Please check out the manual pages for RAND_add(), + RAND_bytes(), RAND_egd(), and the FAQ for more information.