Node.js x509.checkPrivateKey()用法及代碼示例

x509.checkPrivateKey() 是加密模塊中 X509Certificate 類的內置應用程序編程接口，用於檢查該證書的公鑰是否與給定的私鑰一致。

用法:

const x509.checkPrivateKey(privateKey)

參數：該函數將私鑰對象作為參數。

返回值：當且僅當此證書的公鑰與給定的私鑰一致時，此函數才返回布爾值 true。

如何生成公共證書？

公用證書：打開記事本並使用copy-paste和以下 key 並將文件另存為public-cert.pem

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

範例1：

// Node.js program to demonstrate the  
// x509.checkPrivateKey() function
  
// Importing crypto module
const {X509Certificate,createPrivateKey} = require('crypto')
  
// Importing fs module
const fs = require('fs')
  
// getting object of a PEM encoded X509 Certificate. 
const x509 = new X509Certificate
             (fs.readFileSync('public-cert.pem'));
  
// getting private key object
const key = createPrivateKey
            (fs.readFileSync('private-key.pem'))
  
// checking if the public key is consistent or not
// by using x509.checkPrivateKey() function
const value = x509.checkPrivateKey(key)
  
// display the result
if(value)
console.log("public key is consistant")
else
console.log("public key is not consitant")

使用以下命令運行index.js文件：

node index.js

輸出：

public key is consistant

範例2：

// Node.js program to demonstrate the  
// x509.checkPrivateKey() function
  
// Importing crypto module
const {X509Certificate,createPrivateKey} = require('crypto')
  
// Importing fs module
const fs = require('fs')
  
// display the result
if((new X509Certificate(fs.readFileSync('public-cert.pem')))
    .checkPrivateKey(createPrivateKey(fs.readFileSync('private-key.pem'))))
  
console.log("public key is consistant")
else
console.log("public key is not consitant")

使用以下命令運行index.js文件：

node index.js

輸出：

public key is consistant

參考：https://nodejs.org/dist/latest-v15.x/docs/api/crypto.html#crypto_x509_checkprivatekey_privatekey