openssl Linux安装

If you want to install it anywhere else, run config like this:

  On Unix:

    $ ./config --prefix=/opt/openssl --openssldir=/usr/local/ss
           

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-deprecated
                   Don't build with support for any deprecated APIs. This is the
                   same as using "--api" and supplying the latest version

no-dso
                   Don't build support for loading Dynamic Shared Objects.

zlib
                   Build with support for zlib compression/decompression.

           

编译openssl时使用：./config --prefix=/usr/local/openssl enable-deprecated zlib-dynamic enable-crypto-mdebug enable-crypto-mdebug-backtrace 加入上面的选项

make install

sudo mv /usr/bin/openssl /usr/bin/openssl.bak

sudo mv /usr/include/openssl /usr/include/openssl.bak

sudo ln -s /usr/local/openssl/bin/openssl /usr/bin/openssl

sudo ln -s /usr/local/openssl/include/openssl /usr/include/openssl

实测应用程序需要绝对路径包含

sudo sh -c "echo '/usr/local/openssl/lib ’ >> /etc/ld.so.conf

实测应用程序需要-L 指定路径编译

sudo ldconfig -v

sudo cp /usr/local/openssl/include/openssl/* /usr/include/openssl/

sudo cp -r /usr/local/openssl/lib/* /usr/lib/openssh/

sudo cp /usr/local/openssl/bin/openssl /usr/bin/openssl

验证：

openssl version

OpenSSL 1.1.1g 21 Apr 2020

编译应用程序时指定库

sudo gcc -o lash1 lhash.c -L /usr/lib/openssh/ -lcrypto