Function getPayloadSha256

plugins/origin_server_auth/aws_auth_v4.cc:266–279

* @brief: Payload SHA 256 = Hex(SHA256Hash( ) (no new-line char at end) * * @todo support for signing of PUSH, POST content / payload * @param signPayload specifies whether the content / payload should be signed * @return signature of the content or "UNSIGNED-PAYLOAD" to mark that the payload is not signed */

 * @return signature of the content or "UNSIGNED-PAYLOAD" to mark that the payload is not signed
 */
String
getPayloadSha256(bool signPayload)
{
  static const String UNSIGNED_PAYLOAD("UNSIGNED-PAYLOAD");

  if (!signPayload) {
    return UNSIGNED_PAYLOAD;
  }

  unsigned char payloadHash[SHA256_DIGEST_LENGTH];
  SHA256(reinterpret_cast<const unsigned char *>(""), 0, payloadHash); /* empty content */

  return base16Encode(reinterpret_cast<char *>(payloadHash), SHA256_DIGEST_LENGTH);
}

/**
 * @brief Get Canonical Uri SHA256 Hash