Function deriveSigningKey

deriveSigningKey(
    secretAccessKey: string,
    dateStamp: string,
    region: string,
    service: string,
): Promise<Uint8Array<ArrayBufferLike>>
Derive the SigV4 signing key: HMAC(HMAC(HMAC(HMAC("AWS4" + secret, date), region), service), "aws4_request")

Uses TypedArrays to avoid creating temporary strings containing secrets in memory.
Parameters
- secretAccessKey: string
- dateStamp: string
- region: string
- service: string
Returns Promise<Uint8Array<ArrayBufferLike>>
- Defined in src/aws-sigv4.ts:669