Node.js crypto.checkPrime()函数
crypto.checkPrime()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.checkPrime(candidate[, options, [callback]])
参数:此 API 将以下参数作为参数。
- 候选:它是一个缓冲区对象,表示任意长度的大端字节序列。
- option:任何其他会改变此 API 操作的选项。
- callback:是执行的回调函数,作为可选参数传递。
返回值:当且仅当候选是素数时,此 API 才返回 true。
示例 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")
})
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
示例 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:
https://nodejs.org/dist/latest-v15.x/docs/api/crypto.html#crypto_crypto_checkprime_candidate_options_callback