Node.js crypto.checkPrime()函数
原文:https://www . geesforgeks . org/node-js-crypto-check prime-function/
crypto.checkPrime() 是加密模块中加密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是 Prime。
语法:
const crypto.checkPrime(candidate[, options, [callback]])
参数:该 API 以以下参数为参数。
- Candidate: It is a buffer object that represents a big octet sequence of any length.
- Option: Any other option that will change the operation of the application programming interface.
- Callback: is an executed callback function, which is passed as an optional parameter.
返回值:当且仅当候选项为素数时，该 API 返回 true。
例 1:
index.js
// Node.js program to demonstrate the
// crypto.checkPrime() api
// Importing crypto module
const crypto = require('crypto')
// Creating and ini
tializing new
// ArrayBuffer object
const buffer = new ArrayBuffer(8)
// Checking if the buffer object is prime or not
// by using checkPrime() method
crypto.checkPrime(buffer, (err, val) => {
// Checking if any error is found
if (err) throw new Error('Uh oh!');
// 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
例 2:
index . js
// Node.js program to demonstrate the
// crypto.checkPrime() api
// Importing crypto module
const crypto = require('crypto')
// Creating and initializing new
// ArrayBuffer object
const buffer = BigInt("0o377777777777777777")
// Checking if the buffer object is prime or not
// by using checkPrime() method
crypto.checkPrime(buffer, (err, val) => {
// Checking if any error is found
if (err) throw new Error('Uh oh!');
// 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:
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