openssl介绍
OpenSSL是功能强大的，商业级，功能齐全的工具包，可用于传输层安全性（TLS）和安全套接字（SSL）协议。
由于与很多软件保持依赖关系,所以很多情况需要安装它…
下载地址
https://www.openssl.org/source/
这里选择最新的tar.gz包
编译过程
#tar -zxvf 解压 后cd #常用参数,具体还是得根据需求裁剪 ./Configure linux-generic32 shared no-asm no-async no-tests no-comp no-cms no-ec no-cast no-bf \ no-dsa no-ec2m no-idea no-md2 no-ecdh no-rc5 no-ecdsa no-camellia \ no-rc2 no-mdc2 no-sse2 no-rfc3779 no-srp \ no-ocsp no-seed no-ssl2 \ --prefix=/armlib/openssl \ CROSS_COMPILE=/opt/vtcs_toolchain/vienna/usr/bin/arm-linux- \ CC=gcc CXX=g++ make make install
简单参数说明
no-asm : 不使用汇编程序(do not use assembler).
no-async : 不使用GNU的ucontext库,有些版本的编译器不提供GNU C的ucontext库.
no-tests : 不生成测试额外的测试程序
no-comp : 不建立对SSL / TLS压缩的支持。 如果这个选项启用（默认设置），则压缩只会如果还选择了zlib或zlib-dynamic选项，则可以正常工作。
no-cms : 不建立对CMS功能的支持
no-ec : 不建立对椭圆曲线的支持
no-ec2m : 不支持二进制椭圆曲线
no-arg: 不支持这些算法,aria, bf, blake2, camellia, cast, chacha,
cmac, des, dh, dsa, ecdh, ecdsa, idea, md4, mdc2, ocb,
poly1305, rc2, rc4, rmd160, scrypt, seed, siphash, sm2, sm3,
sm4 or whirlpool. The “ripemd” algorithm is deprecated and
if used is synonymous with rmd160.
no-ocsp : 不建立对OCSP的支持。
no-sse2 : 不建立对sse2的支持。
no-rfc3779 : 不建立对RFC3779（“用于IP的X.509扩展地址和AS标识符”）。
no-srp: 不建立对SRP或基于SRP的密码套件的支持。。
no-ocsp : 不建立对OCSP的支持。
–prefix: 用于OpenSSL安装的前缀,其中包含 ==bin, lib, include, share/man,
share/doc/openssl目录,默认的目录为***/ usr / local==***.
linux-generic32: 表示32位linux系统,如果不指定将默认按64位编译.
CROSS_COMPILE: 表示使用的交叉编译链
完整说明
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. This is a rather specialized option for developers. If you just intend to remove all deprecated APIs entirely (up to the current version), it is easier to add the 'no-deprecated' option instead (see 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/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 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. Also, note that --openssldir refers to target's file system, not one you are building on. --debug Build OpenSSL with debugging symbols and zero optimization level. --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] --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. --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<getrandom(2)> or equivalent system call. devrandom: Use 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. 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. 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. 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-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. enable-buildtest-c++ While testing, generate C++ buildtest files that simply check that the public OpenSSL header files are usable standalone with C++. Enabling this option demands extra care. For any compiler flag given directly as configuration option, you must ensure that it's valid for both the C and the C++ compiler. If not, the C++ build test will most likely break. As an alternative, you can use the language specific variables, CFLAGS and CXXFLAGS. 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. enable-devcryptoeng Build the /dev/crypto engine. It is automatically selected on BSD implementations, in which case it can be disabled with no-devcryptoeng. 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 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 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. 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-pinshared By default OpenSSL will attempt to stay in memory until the process exits. This is so that libcrypto and libssl can be properly cleaned up automatically via an "atexit()" handler. The handler is registered by libcrypto and cleans up both libraries. On some platforms the atexit() handler will run on unload of libcrypto (if it has been dynamically loaded) rather than at process exit. This option can be used to stop OpenSSL from attempting to stay in memory until the process exits. This could lead to crashes if either libcrypto or libssl have already been unloaded at the point that the atexit handler is invoked, e.g. on a platform which calls atexit() on unload of the library, and libssl is unloaded before libcrypto then a crash is likely to happen. Applications can suppress running of the atexit() handler at run time by using the OPENSSL_INIT_NO_ATEXIT option to OPENSSL_init_crypto(). See the man page for it for further details. 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 from 32-bit x86 assembly modules. 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 anything from the C header file "stdio.h" that makes use of the "FILE" type. 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-tests Don't build test programs or run any test. 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-console Don't build with the "UI" console method (i.e. the "UI" method that enables text based console 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 In 32-bit x86 builds, when generating assembly modules, use the 80386 instruction set only (the default x86 code is more efficient, but requires at least a 486). Note: This doesn't affect code generated by compiler, you're likely to complement configuration command line with suitable compiler-specific option. no-<prot> Don't build support for negotiating the specified SSL/TLS protocol (one of ssl, ssl3, tls, tls1, tls1_1, tls1_2, tls1_3, dtls, dtls1 or dtls1_2). If "no-tls" is selected then all of tls1, tls1_1, tls1_2 and tls1_3 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. Note that there is no "no-tls1_3-method" option because there is no application method for TLSv1.3. Using individual protocol methods directly is deprecated. Applications should use TLS_method() instead. 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: aria, bf, blake2, camellia, cast, chacha, cmac, des, dh, dsa, ecdh, ecdsa, idea, md4, mdc2, ocb, 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 passed through to the compiler to allow you to define preprocessor symbols, specify additional libraries, library directories or other compiler options. It might be worth noting that some compilers generate code specifically for processor the compiler currently executes on. This is not necessarily what you might have in mind, since it might be unsuitable for execution on other, typically older, processor. Consult your compiler documentation. Take note of the VAR=value documentation below and how these flags interact with those variables. -xxx, +xxx, /xxx Additional options that are not otherwise recognised are passed through as they are to the compiler as well. Unix-style options beginning with a '-' or '+' and Windows-style options beginning with a '/' are recognized. Again, consult your compiler documentation. If the option contains arguments separated by spaces, then the URL-style notation %20 can be used for the space character in order to avoid having to quote the option. For example, -opt%20arg gets expanded to -opt arg. In fact, any ASCII character can be encoded as %xx using its hexadecimal encoding. Take note of the VAR=value documentation below and how these flags interact with those variables. VAR=value 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 the corresponding value in the inherited environment, if there is one. The following variables are used as "make variables" and can be used as an alternative to giving preprocessor, compiler and linker options directly as configuration. The following variables are supported: AR The static library archiver. ARFLAGS Flags for the static library archiver. AS The assembler compiler. ASFLAGS Flags for the assembler compiler. CC The C compiler. CFLAGS Flags for the C compiler. CXX The C++ compiler. CXXFLAGS Flags for the C++ compiler. CPP The C/C++ preprocessor. CPPFLAGS Flags for the C/C++ preprocessor. CPPDEFINES List of CPP macro definitions, separated by a platform specific character (':' or space for Unix, ';' for Windows, ',' for 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 instead of -I (or what corresponds to that on your compiler) in CPPFLAGS. HASHBANGPERL Perl invocation to be inserted after '#!' 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 program linker. LDLIBS Extra libraries to use when linking. Takes the form of a space separated list of library specifications on Unix and Windows, and as a comma separated list of libraries on VMS. RANLIB The library archive indexer. RC The Windows resource compiler. RCFLAGS Flags for the Windows resource compiler. RM The command to remove files and directories.
