Function deriveSigningKey

packages/filesystem/s3/client.ts:44–54

派生 AWS Signature V4 签名密钥

(
  secretKey: string,
  dateStamp: string,
  region: string,
  service: string
)

/** 派生 AWS Signature V4 签名密钥 */
async function deriveSigningKey(
  secretKey: string,
  dateStamp: string,
  region: string,
  service: string
): Promise<ArrayBuffer> {
  const kDate = await hmacSha256(new TextEncoder().encode(`AWS4${secretKey}`).buffer as ArrayBuffer, dateStamp);
  const kRegion = await hmacSha256(kDate, region);
  const kService = await hmacSha256(kRegion, service);
  return hmacSha256(kService, "aws4_request");
}

// ---- URI 编码 ----