crypto.generateKey(type, options, callback)

• type: <string> 生成的密钥的预期用途。 当前接受的值为 'hmac' 和 'aes'。
• options: <Object>
  • length: <number> 要生成的密钥的位长。 这必须是一个大于 0 的值。
    • 如果 type 为 'hmac'，则最小为 8，最大长度为 2³¹-1。 如果该值不是 8 的倍数，则生成的密钥将被截断为 Math.floor(length / 8)。
    • 如果 type 是 'aes'，则长度必须是 128、192 或 256 之一。
• callback: <Function>
  • err: <Error>
  • key: <KeyObject>

异步生成给定 length 的新随机密钥。 type 将确定将在 length 上执行哪些验证。

const {
  generateKey
} = await import('node:crypto');

generateKey('hmac', { length: 64 }, (err, key) => {
  if (err) throw err;
  console.log(key.export().toString('hex'));  // 46e..........620
});const {
  generateKey,
} = require('node:crypto');

generateKey('hmac', { length: 64 }, (err, key) => {
  if (err) throw err;
  console.log(key.export().toString('hex'));  // 46e..........620
});

• type: <string> The intended use of the generated secret key. Currently accepted values are 'hmac' and 'aes'.
• options: <Object>
  • length: <number> The bit length of the key to generate. This must be a value greater than 0.
    • If type is 'hmac', the minimum is 8, and the maximum length is 2³¹-1. If the value is not a multiple of 8, the generated key will be truncated to Math.floor(length / 8).
    • If type is 'aes', the length must be one of 128, 192, or 256.
• callback: <Function>
  • err: <Error>
  • key: <KeyObject>

Asynchronously generates a new random secret key of the given length. The type will determine which validations will be performed on the length.

const {
  generateKey
} = await import('node:crypto');

generateKey('hmac', { length: 64 }, (err, key) => {
  if (err) throw err;
  console.log(key.export().toString('hex'));  // 46e..........620
});const {
  generateKey,
} = require('node:crypto');

generateKey('hmac', { length: 64 }, (err, key) => {
  if (err) throw err;
  console.log(key.export().toString('hex'));  // 46e..........620
});