📜  Node.js crypto.checkPrimeSync()函数

📅  最后修改于: 2022-05-13 01:56:23.594000             🧑  作者: Mango

Node.js crypto.checkPrimeSync()函数

checkPrimeSync()是加密模块中 Crypto 类的内置应用程序编程接口,用于检查传递的缓冲区对象是否为素数。

句法:

const crypto.checkPrimeSync(candidate[, options])

参数:此函数将以下参数作为参数。

  • 候选:这是一个缓冲区对象,表示任意长度的大端字节序列。
  • 选项:将改变此函数操作的选项。

返回值:当且仅当候选是素数时,此函数才返回 true。

示例 1:

index.js
// Node.js program to demonstrate the  
// crypto.checkPrimeSync() function
  
// Importing crypto module
const crypto = require('crypto')
  
// creating and initializing new 
// ArrayBuffer object
const buffer = new ArrayBuffer(8)
  
// checking if the buffer object is prime or not
// by using checkPrimeSync() method
const val = crypto.checkPrimeSync(buffer)
  
//display the result
if(val)
console.log("candidate is a prime")
else
console.log("candidate is not a prime")


index.js
// Node.js program to demonstrate the  
// crypto.checkPrimeSync() function
  
// Importing crypto module
const crypto = require('crypto')
  
// creating and initializing new 
// BigInt object
const buffer = BigInt("0o377777777777777777")
  
// checking if the buffer object is prime or not
// by using checkPrimeSync() method
const val = crypto.checkPrimeSync(buffer)
  
//display the result
if(val)
console.log("candidate is a prime")
else
console.log("candidate is not a prime")


使用以下命令运行 index.js 文件:

node index.js

输出:

candidate is not a prime

示例 2:

index.js

// Node.js program to demonstrate the  
// crypto.checkPrimeSync() function
  
// Importing crypto module
const crypto = require('crypto')
  
// creating and initializing new 
// BigInt object
const buffer = BigInt("0o377777777777777777")
  
// checking if the buffer object is prime or not
// by using checkPrimeSync() method
const val = crypto.checkPrimeSync(buffer)
  
//display the result
if(val)
console.log("candidate is a prime")
else
console.log("candidate is not a prime")

使用以下命令运行 index.js 文件:

node index.js

输出:

candidate is not a prime

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