远程开启硬件权限，会用到SSL证书。

以下是Win10系统下用OpenSSL生成测试用证书的步骤。

Step 1. 下载OpenSSL,一般选择64位的MSI

Win32/Win64 OpenSSL Installer for Windows - Shining Light Productions    

一路点下来，如果后续请你捐款，可以不选择。

win10下很可能的安装路径为: C:\Program Files\OpenSSL-Win64

Step 2. 将 C:\Program Files\OpenSSL-Win64\bin这个路径添加到系统环境变量中。

Step 3. 新建一个目录，例如我的: D:\dev\openssl\

新建一个文件夹是防止系统环境下有读写权限限制问题。

Step 4. 在这个目录下新建一个 openssl.cnf 文件保存为utf-8格式。

文件内容为:

# # OpenSSL configuration file. #  # Establish working directory.  dir                         = .  [ ca ] default_ca                  = CA_default  [ CA_default ] serial                      = $dir/serial database                    = $dir/certindex.txt new_certs_dir               = $dir/certs certificate                 = $dir/cacert.pem private_key                 = $dir/private/cakey.pem default_days                = 365 default_md                  = md5 preserve                    = no email_in_dn                 = no nameopt                     = default_ca certopt                     = default_ca policy                      = policy_match  [ policy_match ] countryName                 = match stateOrProvinceName         = match organizationName            = match organizationalUnitName      = optional commonName                  = supplied emailAddress                = optional  [ req ] default_bits                = 1024          # Size of keys default_keyfile             = key.pem       # name of generated keys default_md                  = md5               # message digest algorithm string_mask                 = nombstr       # permitted characters distinguished_name          = req_distinguished_name req_extensions              = v3_req  [ req_distinguished_name ] # Variable name             Prompt string #-------------------------    ---------------------------------- 0.organizationName          = Organization Name (company) organizationalUnitName      = Organizational Unit Name (department, division) emailAddress                = Email Address emailAddress_max            = 40 localityName                = Locality Name (city, district) stateOrProvinceName         = State or Province Name (full name) countryName                 = Country Name (2 letter code) countryName_min             = 2 countryName_max             = 2 commonName                  = Common Name (hostname, IP, or your name) commonName_max              = 64  # Default values for the above, for consistency and less typing. # Variable name             Value #------------------------     ------------------------------ 0.organizationName_default  = My Company localityName_default        = My Town stateOrProvinceName_default = State or Providence countryName_default         = US  [ v3_ca ] basicConstraints            = CA:TRUE subjectKeyIdentifier        = hash authorityKeyIdentifier      = keyid:always,issuer:always  [ v3_req ] basicConstraints            = CA:FALSE subjectKeyIdentifier        = hash

感谢: Unable to load config info from /usr/local/ssl/openssl.cnf on Windows - Stack Overflow

Step 5. 在新建的D:\dev\openssl\文件夹下，打开cmd窗口，设置openssl.cnf路径环境变量，命令如下:

set OPENSSL_CONF=D:\dev\openssl\openssl.cnf

如果没有正确指定这个环境变量，则会报如下错误:

Unable to load config info from /z/extlib/_openssl_/ssl/openssl.cnf

Step 6. 在命令行中创建privateKey.pem

openssl.exe genrsa -out privateKey.pem 4096

执行成功，打印如下:

Generating RSA private key, 4096 bit long modulus ..............................................................................................................................................++ ............................................................................++ e is 65537 (0x10001)

感谢: openssl - Unable to load Private Key. (PEM routines:PEM_read_bio:no start line:pem_lib.c:648:Expecting: ANY PRIVATE KEY) - Stack Overflow

Step7. 生成证书，命令如下:

openssl.exe req -new -x509 -nodes -days 3600 -key privateKey.pem -out caKey.pem

会提示你输入组织名称，email地址，联系地址、所属国家等信息，正常输入就ok了。

如果没有正确生成 privateKey.pem或者找不到这个文件，则会报错：

req: Can't open "privateKey.key" for writing, Permission denied

Step 8. 恭喜，搞定。

Step 9. 在用NodeJS写一个简单的https Server试试。代码如下:

// server.js const https = require('https'); const fs = require('fs');  const options = {   key: fs.readFileSync('privateKey.pem'),   cert: fs.readFileSync('caKey.pem') };  const app = function (req, res) {   res.writeHead(200);   res.end("hello world\n"); }  https.createServer(options, app).listen(9000);

Step 10. 在浏览器中输入 https://localhost:9000/就能访问。如果是chrome浏览器，会提示这是不安全链接，需要你在当前页面里点击高级，然后选择继续访问。成功访问的话，会在页面中显示:

hello world

Step 11. 再来一个功能更丰富的Sever。

const https = require('https'); const fs = require('fs'); const path = require('path');  const options = {   key: fs.readFileSync('privateKey.pem'),   cert: fs.readFileSync('./caKey.pem') }; var serverPort = 9100; https.createServer(options, (req, res) => {   const filePath = '.' + req.url;   const extname = path.extname(filePath);   let contentType = 'text/html';    switch (extname) {     case '.js':       contentType = 'text/javascript';       break;     case '.css':       contentType = 'text/css';       break;     case '.json':       contentType = 'application/json';       break;     case '.png':       contentType = 'image/png';       break;     case '.jpg':       contentType = 'image/jpg';       break;     case '.wav':       contentType = 'audio/wav';       break;   }    fs.readFile(filePath, (error, content) => {     if (error) {       if (error.code == 'ENOENT') {         fs.readFile('./404.html', (error, content) => {           res.writeHead(200, { 'Content-Type': contentType });           res.end(content, 'utf-8');         });       } else {         res.writeHead(500);         res.end('Sorry, check with the site admin for error: ' + error.code + ' ..\n');         res.end();       }     } else {       res.writeHead(200, { 'Content-Type': contentType });       res.end(content, 'utf-8');     }   });  }).listen(serverPort);  console.log(`Server running at https://127.0.0.1:${serverPort}/`);