npm错误无法在本地获取颁发者证书，如何从证书捆绑包和该捆绑包生成.pem文件？

使用Webstorm和Node.js，我试图通过npm安装

ursa

模块。我需要这个模块，因为它是另一个模块的先决条件

当我安装时，节点gyp rebuild上的安装失败

控制台输出如下所示：

C:\Users\{Me}>npm install ursa --save
> ursa@0.9.4 install C:\Users\{Me}\node_modules\ursa
> node-gyp rebuild

C:\Users\Me\node_modules\ursa>if not defined npm_config_node_gyp 
(node "C:\Program Files\nodejs\node_modules\npm\bin\node-gyp-bin\\..
\..\node_modules\node-gyp\bin\node-gyp.js" rebuild )  else (node "" rebuild )
gyp WARN install got an error, rolling back install
gyp ERR! configure error
gyp ERR! stack Error: unable to get local issuer certificate
gyp ERR! stack     at Error (native)
gyp ERR! stack     at TLSSocket.<anonymous> (_tls_wrap.js:1092:38)
gyp ERR! stack     at emitNone (events.js:86:13)
gyp ERR! stack     at TLSSocket.emit (events.js:185:7)
gyp ERR! stack     at TLSSocket._finishInit (_tls_wrap.js:610:8)
gyp ERR! stack     at TLSWrap.ssl.onhandshakedone (_tls_wrap.js:440:38)
gyp ERR! System Windows_NT 6.1.7601
gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" 
"C:\\Program Files\\nodejs\\node_modules\\npm\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild"
gyp ERR! cwd C:\Users\{Me}\node_modules\ursa
gyp ERR! node -v v6.11.0
gyp ERR! node-gyp -v v3.4.0
gyp ERR! not ok
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@^1.0.0 (node_modules\chokidar\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.1: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm ERR! Windows_NT 6.1.7601
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "install" "ursa" "--save"
npm ERR! node v6.11.0
npm ERR! npm  v3.10.10
npm ERR! code ELIFECYCLE

npm ERR! ursa@0.9.4 install: `node-gyp rebuild`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the ursa@0.9.4 install script 'node-gyp rebuild'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the ursa package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node-gyp rebuild
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs ursa
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls ursa
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR! C:\Users\p704644d\{Me}\npm-debug.log

C:\Users\{Me}>npm安装ursa——保存
> ursa@0.9.4安装C:\Users\{Me}\node\u模块\ursa
>节点gyp重建
C:\Users\Me\node\u modules\ursa>如果未定义npm\u config\u node\u gyp
（节点“C:\Program Files\nodejs\node\U modules\npm\bin\node gyp bin\\。。
\..\node\u modules\node gyp\bin\node gyp.js“重建）else（node“重建）
gyp WARN安装出错，正在回滚安装
哎呀！配置错误
哎呀！堆栈错误：无法获取本地颁发者证书
哎呀！堆栈出错（本机）
哎呀！在TLSSocket堆叠

$openssl x509-通知der-in/path/to/the.crt-out/path/to/the/file.pem

问题是，如何知道安装失败的证书，以及如何生成.pem文件？我应该在哪里找到我的证书，以及如何捆绑它们以获得一个.pem文件？（在Win 7上）
如果您位于使用SSL检查交换SSL证书的公司防火墙后面，请向您的网络管理员索取证书文件。否则，您可以通过连接任何交换证书的网站，使用Firefox或Chrome下载证书。然后您可以使用
NODE\u EXTRA\u CA\u CERTS
将证书文件提供给NODE.js，正如我在中所回答的那样