介绍
有些时间，我们可能需要使用到openssl新版本的功能，但是centos的源目前没有提供那么新的版本，就需要自己更新了。
我这里就是需要使用openssl生成sm2的公钥私钥，需要升级到1.1.1。
升级方法
[root@node-21-243 deploy]# openssl version
OpenSSL 1.0.2k-fips 26 Jan 2017
[root@node-21-243 deploy]# cd /usr/local/src
[root@node-21-243 src]# wget https://github.com/openssl/openssl/archive/OpenSSL_1_1_1c.tar.gz
[root@node-21-243 src]tar xzvf ./OpenSSL_1_1_1c.tar.gz
[root@node-21-243 src]# cd openssl-OpenSSL_1_1_1c/
[root@node-21-243 openssl-OpenSSL_1_1_1c]# ./config
Operating system: x86_64-whatever-linux2
Configuring OpenSSL version 1.1.1c (0x1010103fL) for linux-x86_64
Using os-specific seed configuration
Creating configdata.pm
Creating Makefile
**********************************************************************
*** ***
*** OpenSSL has been successfully configured ***
*** ***
*** If you encounter a problem while building, please open an ***
*** issue on GitHub <https://github.com/openssl/openssl/issues> ***
*** and include the output from the following command: ***
*** ***
*** perl configdata.pm --dump ***
*** ***
*** (If you are new to OpenSSL, you might want to consult the ***
*** 'Troubleshooting' section in the INSTALL file first) ***
*** ***
**********************************************************************
[root@node-21-243 openssl-OpenSSL_1_1_1c]# make
[root@node-21-243 openssl-OpenSSL_1_1_1c]# make install
[root@node-21-243 openssl-OpenSSL_1_1_1c]# mv /usr/bin/openssl /usr/bin/oldopenssl
[root@node-21-243 openssl-OpenSSL_1_1_1c]# ln -s /usr/local/bin/openssl /usr/bin/openssl
[root@node-21-243 openssl-OpenSSL_1_1_1c]# ln -s /usr/local/lib64/libssl.so.1.1 /usr/lib64/
[root@node-21-243 openssl-OpenSSL_1_1_1c]# ln -s /usr/local/lib64/libcrypto.so.1.1 /usr/lib64/
[root@node-21-243 openssl-OpenSSL_1_1_1c]# openssl version
OpenSSL 1.1.1c 28 May 2019
注意
执行./config命令会检查相关依赖，根据返回的信息，安装相关依赖即可。如果不缺少依赖的话，会返回上面的输出。