node . js diffihellman . set private key()方法
原文:https://www . geesforgeks . org/node-js-diffihellman-set private key-method/
DiffieHellman . SetPrivatKey()方法是加密模块内类 DiffieHellman (dh)的内置应用编程接口，用于设置 dh 对象的私钥。
语法:
diffieHellman.setPrivateKey(privateKey[, encoding])
参数:该方法接受以下两个参数:
- Private key: is used to represent the private key.
- code: code used to represent private key . If the code is provided, the private key should be a string; otherwise, it is a buffer, type data or data view.
例 1:
index . js
// Node.js program to demonstrate the
// diffieHellman.setPrivateKey() Method
const crypto = require('crypto')
// Generate DH Key pair
crypto.generateKeyPair('dh',
{
primeLength: 512,
publicKeyEncoding: {
type: 'spki',
format: 'der'
},
privateKeyEncoding: {
type: 'pkcs8',
format: 'der'
}
},
cb
)
function cb(err, publicKey, privateKey){
// Create Diffie-Hellman instance
const dh = crypto.createDiffieHellman(512)
// Set the dh's privateKey
dh.setPrivateKey(privateKey)
if( privateKey.equals(dh.getPrivateKey()) )
console.log("DH private Key is set successfully")
}
使用以下命令运行 index.js 文件
node index.js
输出:
DH private Key is set successfully
例 2:
index . js
// Node.js program to demonstrate the
// diffieHellman.setPrivateKey() Method
const crypto = require( 'crypto' )
crypto.generateKeyPair(
'dh',
{ primeLength: 512 },
cb
)
function cb( err, publicKey, privateKey ){
// Export key from KeyObject
privateKey = privateKey.export( {type: 'pkcs8', format: 'der'} )
// Encode key in base64
privateKey = privateKey.toString('base64');
// Create Diffie-Hellman instance
const dh = crypto.createDiffieHellman( 512 )
// Set the dh's privateKey
dh.setPrivateKey( privateKey, 'base64' )
if( privateKey === dh.getPrivateKey('base64') )
console.log( "DH private Key is set successfully" )
}
使用以下命令运行 index.js 文件
node index.js
输出:
DH private Key is set successfully
参考:https://nodejs . org/API/crypto . html # crypt _ ecdh _ setprivtekey _ private key _ encoding
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