subtle.sign(algorithm, key, data)

• algorithm：<AlgorithmIdentifier> | <RsaPssParams> | <EcdsaParams> | <Ed448Params>

• key：<CryptoKey>

• data：<ArrayBuffer> | <TypedArray> | <DataView> | <Buffer>

• 返回：<Promise> 满足 <ArrayBuffer>

  ¥Returns: <Promise> Fulfills with an <ArrayBuffer>

使用 algorithm 给出的方法和参数以及 key 提供的密钥材料，subtle.sign() 尝试生成 data 的加密签名。如果成功，返回的 promise 将使用包含生成的签名的 <ArrayBuffer> 进行解析。

¥Using the method and parameters given by algorithm and the keying material provided by key, subtle.sign() attempts to generate a cryptographic signature of data. If successful, the returned promise is resolved with an <ArrayBuffer> containing the generated signature.

目前支持的算法包括：

¥The algorithms currently supported include:

• 'RSASSA-PKCS1-v1_5'

• 'RSA-PSS'

• 'ECDSA'

• 'Ed25519'

• 'Ed448' ¹

• 'HMAC'