RSA-PSS sha-256 modulusLength: 2048 用于签名和验证签名
private
initCryptoPair(force?: boolean)
sign(data: ArrayBuffer): Promise<ArrayBuffer>
verify(signature: ArrayBuffer,data: ArrayBuffer,): Promise<boolean>
parsePublickKey(publicKey: ArrayBuffer | Uint8Array): Promise<CryptoKey>
解析公钥
sign(privateKey: CryptoKey,data: ArrayBuffer,): Promise<ArrayBuffer>