subtle.deriveBits(algorithm, baseKey[, length])

• algorithm <EcdhKeyDeriveParams> | <HkdfParams> | <Pbkdf2Params>

• baseKey <CryptoKey>

• length <number> | <null> 默认值:null

  \length <number> | <null> Default: null

• 返回:<Promise> 成功后使用 <ArrayBuffer> 完成。

  \Returns: <Promise> Fulfills with an <ArrayBuffer> upon success.

使用 algorithm 中指定的方法和参数以及 baseKey 提供的密钥材料,subtle.deriveBits() 尝试生成 length 位。

\Using the method and parameters specified in algorithm and the keying material provided by baseKey, subtle.deriveBits() attempts to generate length bits.

当未提供 length 或 null 时,将生成给定算法的最大位数。这适用于 'ECDH'、'X25519' 和 'X448' 算法,对于其他算法,length 必须为数字。

\When length is not provided or null the maximum number of bits for a given algorithm is generated. This is allowed for the 'ECDH', 'X25519', and 'X448' algorithms, for other algorithms length is required to be a number.

如果成功,返回的 promise 将使用包含生成数据的 <ArrayBuffer> 进行解析。

\If successful, the returned promise will be resolved with an <ArrayBuffer> containing the generated data.

目前支持的算法包括:

\The algorithms currently supported include:

• 'ECDH'

• 'X25519'

• 'X448' ¹

• 'HKDF'

• 'PBKDF2'