private HttpRequestMessage PreparePutRequest(Stream stream, string filename)
{
AwsV4SignatureCalculator calculator = new AwsV4SignatureCalculator(_secretKey);
HttpRequestMessage requestMessage = new HttpRequestMessage(HttpMethod.Put, new Uri($"{_protocol}://{_endpoint}/{_bucketName}/{filename}"));
DateTime value = DateTime.UtcNow;
ByteArrayContent content;
if (stream is MemoryStream ms)
{
content = new ByteArrayContent(ms.ToArray());
}
else
{
using MemoryStream memoryStream = new MemoryStream();
stream.CopyTo(memoryStream);
content = new ByteArrayContent(memoryStream.ToArray());
}
requestMessage.Content = content;
stream.Dispose();
requestMessage.Headers.Add("Host", _endpoint);
requestMessage.Headers.Add("X-Amz-Content-Sha256", AwsV4SignatureCalculator.GetPayloadHash(requestMessage));
requestMessage.Headers.Add("X-Amz-Date", $"{value:yyyyMMddTHHmmssZ}");
string[] headers = { "host", "x-amz-content-sha256", "x-amz-date" };
string signature = calculator.CalculateSignature(requestMessage, headers, value);
string authHeader = $"AWS4-HMAC-SHA256 Credential={_accessKey}/{value:yyyyMMdd}/us-east-1/s3/aws4_request, SignedHeaders={string.Join(";", headers)}, Signature={signature}";
requestMessage.Headers.TryAddWithoutValidation("Authorization", authHeader);
return(requestMessage);
}
private HttpRequestMessage PrepareGetRequest(string filename)
{
AwsV4SignatureCalculator calculator = new AwsV4SignatureCalculator(_secretKey);
HttpRequestMessage requestMessage = new HttpRequestMessage(HttpMethod.Get, new Uri($"{_protocol}://{_endpoint}/{_bucketName}/{filename}"));
DateTime value = DateTime.UtcNow;
requestMessage.Headers.Add("Host", _endpoint);
requestMessage.Headers.Add("X-Amz-Content-Sha256", AwsV4SignatureCalculator.GetPayloadHash(requestMessage));
requestMessage.Headers.Add("X-Amz-Date", $"{value:yyyyMMddTHHmmssZ}");
string[] headers = { "host", "x-amz-content-sha256", "x-amz-date" };
string signature = calculator.CalculateSignature(requestMessage, headers, value);
string authHeader = $"AWS4-HMAC-SHA256 Credential={_accessKey}/{value:yyyyMMdd}/us-east-1/s3/aws4_request, SignedHeaders={string.Join(";", headers)}, Signature={signature}";
requestMessage.Headers.TryAddWithoutValidation("Authorization", authHeader);
return(requestMessage);
}