qt qsslsocket linux,Qt-network.ssl QSslSocket:TLS初始化失败等等问题

在使用QML的时候运行程序的时候遇到了好几次类似以下问题：

qt.network.ssl: QSslSocket::connectToHostEncrypted: TLS initialization failed

qt.network.ssl: QSslSocket: cannot resolve DTLSv1_2_server_method

qt.network.ssl: QSslSocket: cannot resolve DTLSv1_2_client_method

qt.network.ssl: QSslSocket: cannot resolve SSL_CONF_CTX_new

qt.network.ssl: QSslSocket: cannot resolve SSL_CONF_CTX_free

qt.network.ssl: QSslSocket: cannot resolve SSL_CONF_CTX_set_ssl_ctx

qt.network.ssl: QSslSocket: cannot resolve SSL_CONF_CTX_set_flags

qt.network.ssl: QSslSocket: cannot resolve SSL_CONF_CTX_finish

qt.network.ssl: QSslSocket: cannot resolve SSL_CONF_cmd

qt.network.ssl: QSslSocket: cannot resolve SSL_set_alpn_protos

qt.network.ssl: QSslSocket: cannot resolve SSL_CTX_set_alpn_select_cb

qt.network.ssl: QSslSocket: cannot resolve SSL_get0_alpn_selected

qt.network.ssl: QSslSocket: cannot resolve DTLS_server_method

qt.network.ssl: QSslSocket: cannot resolve DTLS_client_method

qt.network.ssl: QSslSocket: cannot call unresolved function DTLS_client_method

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重点来了：最后总结了一下大概可以从以下方法解决：

1、对于Qt mingw版本用户来说

一般在：

C:\Qt\Qt 5.xx.x\Tools\mingw730_32\opt\bin(32位)

或者：

C:\Qt\Qt 5.xx.x\Tools\mingw730_32\opt\bin(64位)

目录(以实际安装路径为准)可以找到  libeay32.dll ssleay32.dll 两个文件

1)复制这两个文件到Qt工程生成可执行文件的目录(即exe文件同目录下)中去，再次运行，错误消失

2)复制这两个文件到C:\Qt\Qt 5.xx.x\Qt 5.xx.x\mingwxxx_xx\bin的目录下，再次运行，错误消失

上方式一般对于mingw版本来说基本可以解决

2、对于Qt MSVC版本用户来说

A、可以随便一个Qt C++工程中打印出openssl版本信息

#include

qDebug()<<:ssllibrarybuildversionstring>

5.12.3版本为例，执行打印出  OpenSSL 1.1.1b 26 Feb 2019

B、根据相应版本去下载OpenSSL的二进制文件，当然也可以选择自己编译，只不过有点麻烦

我下载的是Win64 OpenSSL v1.1.1d Light，完了之后安装

C、安装好后在安装目录找到libcrypto-1_1-x64.dll libssl-1_1-x64.dll两个文件 ，然后粘贴到

C:\Qt\Qt5.13.0\5.13.0\msvc2017_64\bin目录再次运行，错误消失，完美解决