官网 https://www.openssl.org/

    源代码获取

    1. git clone https://github.com/openssl/openssl

    源代码编译：

    1. mkdir /opt/openssl、
    2. git checkout OpenSSL_1_0_2-stable
    3. ./Configure --prefix=/opt/openssl darwin64-x86_64-cc -mmacosx-version-min=10.9
    4. make
    5. sudo make install