crypto.scryptSync(password, salt, keylen[, options])

• password <string> | <Buffer> | <TypedArray> | <DataView>
• salt <string> | <Buffer> | <TypedArray> | <DataView>
• keylen <number>
• options <Object>
  • cost <number> CPU/内存成本参数。 必须是大于 1 的 2 的幂。 默认值: 16384。
  • blockSize <number> 块大小参数。 默认值: 8。
  • parallelization <number> 并行化参数。 默认值: 1。
  • N <number> cost 的别名。 只能指定两者之一。
  • r <number> blockSize 的别名。 只能指定两者之一。
  • p <number> parallelization 的别名。 只能指定两者之一。
  • maxmem <number> 内存上限。 当（大约）128 * N * r > maxmem 时，则为错误。 默认值: 32 * 1024 * 1024。
• 返回: <Buffer>

提供同步的 scrypt 实现。 Scrypt 是一个基于密码的密钥派生函数，其设计在计算和内存方面都非常昂贵，以使蛮力攻击毫无回报。

salt 应该尽可能唯一。 建议盐是随机的，长度至少为 16 字节。 有关详细信息，请参阅 NIST SP 800-132。

当密钥派生失败时抛出异常，否则派生的密钥作为 Buffer 返回。

当任何输入参数指定无效值或类型时，将抛出异常。

const crypto = require('crypto');
// 使用出厂默认设置。
const key1 = crypto.scryptSync('password', 'salt', 64);
console.log(key1.toString('hex'));  // '3745e48...08d59ae'
// 使用自定义 N 参数。必须是二的幂。
const key2 = crypto.scryptSync('password', 'salt', 64, { N: 1024 });
console.log(key2.toString('hex'));  // '3745e48...aa39b34'

• password <string> | <Buffer> | <TypedArray> | <DataView>
• salt <string> | <Buffer> | <TypedArray> | <DataView>
• keylen <number>
• options <Object>
  • cost <number> CPU/memory cost parameter. Must be a power of two greater than one. Default: 16384.
  • blockSize <number> Block size parameter. Default: 8.
  • parallelization <number> Parallelization parameter. Default: 1.
  • N <number> Alias for cost. Only one of both may be specified.
  • r <number> Alias for blockSize. Only one of both may be specified.
  • p <number> Alias for parallelization. Only one of both may be specified.
  • maxmem <number> Memory upper bound. It is an error when (approximately) 128 * N * r > maxmem. Default: 32 * 1024 * 1024.
• Returns: <Buffer>

Provides a synchronous scrypt implementation. Scrypt is a password-based key derivation function that is designed to be expensive computationally and memory-wise in order to make brute-force attacks unrewarding.

The salt should be as unique as possible. It is recommended that a salt is random and at least 16 bytes long. See NIST SP 800-132 for details.

An exception is thrown when key derivation fails, otherwise the derived key is returned as a Buffer.

An exception is thrown when any of the input arguments specify invalid values or types.

const crypto = require('crypto');
// Using the factory defaults.
const key1 = crypto.scryptSync('password', 'salt', 64);
console.log(key1.toString('hex'));  // '3745e48...08d59ae'
// Using a custom N parameter. Must be a power of two.
const key2 = crypto.scryptSync('password', 'salt', 64, { N: 1024 });
console.log(key2.toString('hex'));  // '3745e48...aa39b34'