subtle.importKey(format, keyData, algorithm, extractable, keyUsages)

• format <string> 必须是 'raw'、'pkcs8'、'spki'、'jwk'、'raw-secret'⁴、'raw-public'⁴ 或 'raw-seed'⁴ 之一。
• keyData <ArrayBuffer> | <TypedArray> | <DataView> | <Buffer> | <Object>

• algorithm <string> | <RsaHashedImportParams> | <EcKeyImportParams> | <HmacImportParams>

• extractable <boolean>
• keyUsages <string[]> 见 主要用途。
• 返回：<Promise> 在成功时以 <CryptoKey> 完成。

此方法尝试将提供的 keyData 解释为给定的 format，使用提供的 algorithm、extractable 和 keyUsages 参数创建一个 <CryptoKey> 实例。如果导入成功，返回的 Promise 将会解析为键材料的 <CryptoKey> 表示。

【This method attempts to interpret the provided keyData as the given format to create a <CryptoKey> instance using the provided algorithm, extractable, and keyUsages arguments. If the import is successful, the returned promise will be resolved with a <CryptoKey> representation of the key material.】

如果导入 KDF 算法的密钥，extractable 必须为 false。

【If importing KDF algorithm keys, extractable must be false.】

目前支持的算法包括：

【The algorithms currently supported include:】

Supported Key Algorithm	'spki'	'pkcs8'	'jwk'	'raw'	'raw-secret'	'raw-public'	'raw-seed'
'AES-CBC'			✔	✔	✔
'AES-CTR'			✔	✔	✔
'AES-GCM'			✔	✔	✔
'AES-KW'			✔	✔	✔
'AES-OCB'4			✔		✔
'Argon2d'4					✔
'Argon2i'4					✔
'Argon2id'4					✔
'ChaCha20-Poly1305'4			✔		✔
'ECDH'	✔	✔	✔	✔		✔
'ECDSA'	✔	✔	✔	✔		✔
'Ed25519'	✔	✔	✔	✔		✔
'Ed448'5	✔	✔	✔	✔		✔
'HDKF'				✔	✔
'HMAC'			✔	✔	✔
'KMAC128'4			✔		✔
'KMAC256'4			✔		✔
'ML-DSA-44'4	✔	✔	✔			✔	✔
'ML-DSA-65'4	✔	✔	✔			✔	✔
'ML-DSA-87'4	✔	✔	✔			✔	✔
'ML-KEM-512'4	✔	✔				✔	✔
'ML-KEM-768'4	✔	✔				✔	✔
'ML-KEM-1024'4	✔	✔				✔	✔
'PBKDF2'				✔	✔
'RSA-OAEP'	✔	✔	✔
'RSA-PSS'	✔	✔	✔
'RSASSA-PKCS1-v1_5'	✔	✔	✔
'X25519'	✔	✔	✔	✔		✔
'X448'5	✔	✔	✔	✔		✔