method SubtleCrypto.signprivateSubtleCrypto.sign(algorithm: AlgorithmIdentifier | RsaPssParams | EcdsaParams,key: CryptoKey,data: BufferSource,): Promise<ArrayBuffer>DeprecatedParametersalgorithm: AlgorithmIdentifier | RsaPssParams | EcdsaParamskey: CryptoKeydata: BufferSourceReturn TypePromise<ArrayBuffer>