protected void SetupFlexibleChecksumStream(IWebResponseData responseData, Stream responseStream, long contentLength, IRequestContext requestContext)
{
var algorithm = ChecksumUtils.SelectChecksumForResponseValidation(requestContext?.OriginalRequest?.ChecksumResponseAlgorithms, responseData);
if (algorithm == CoreChecksumAlgorithm.NONE)
{
return;
}
ChecksumAlgorithm = algorithm;
ExpectedFlexibleChecksumResult = responseData.GetHeaderValue(ChecksumUtils.GetChecksumHeaderKey(algorithm));
var checksum = Convert.FromBase64String(ExpectedFlexibleChecksumResult);
switch (algorithm)
{
case CoreChecksumAlgorithm.CRC32C:
FlexibleChecksumStream = new HashStream <HashingWrapperCRC32C>(responseStream, checksum, contentLength);
break;
case CoreChecksumAlgorithm.CRC32:
FlexibleChecksumStream = new HashStream <HashingWrapperCRC32>(responseStream, checksum, contentLength);
break;
case CoreChecksumAlgorithm.SHA256:
FlexibleChecksumStream = new HashStream <HashingWrapperSHA256>(responseStream, checksum, contentLength);
break;
case CoreChecksumAlgorithm.SHA1:
FlexibleChecksumStream = new HashStream <HashingWrapperSHA1>(responseStream, checksum, contentLength);
break;
default:
throw new AmazonClientException($"Unsupported checksum algorithm {algorithm}");
}
}