private async Task ProcessAsync(HttpPipelineMessage message, bool async)
{
string contentHash;
using (var alg = SHA256.Create())
{
using (var memoryStream = new MemoryStream())
using (var contentHashStream = new CryptoStream(memoryStream, alg, CryptoStreamMode.Write))
{
if (message.Request.Content != null)
{
if (async)
{
await message.Request.Content.WriteToAsync(contentHashStream, message.Cancellation);
}
else
{
message.Request.Content.WriteTo(contentHashStream, message.Cancellation);
}
}
}
contentHash = Convert.ToBase64String(alg.Hash);
}
using (var hmac = new HMACSHA256(_secret))
{
var uri = message.Request.UriBuilder.Uri;
var host = uri.Host;
var pathAndQuery = uri.PathAndQuery;
string method = HttpPipelineMethodConverter.ToString(message.Request.Method);
DateTimeOffset utcNow = DateTimeOffset.UtcNow;
var utcNowString = utcNow.ToString("r");
var stringToSign = $"{method}\n{pathAndQuery}\n{utcNowString};{host};{contentHash}";
var signature = Convert.ToBase64String(hmac.ComputeHash(Encoding.ASCII.GetBytes(stringToSign))); // Calculate the signature
string signedHeaders = "date;host;x-ms-content-sha256"; // Semicolon separated header names
// TODO (pri 3): should date header writing be moved out from here?
message.Request.Headers.Add("Date", utcNowString);
message.Request.Headers.Add("x-ms-content-sha256", contentHash);
message.Request.Headers.Add("Authorization", $"HMAC-SHA256 Credential={_credential}, SignedHeaders={signedHeaders}, Signature={signature}");
}
}
public static RecordEntry Deserialize(JsonElement element)
{
var record = new RecordEntry();
if (element.TryGetProperty(nameof(RequestMethod), out JsonElement property))
{
record.RequestMethod = HttpPipelineMethodConverter.Parse(property.GetString());
}
if (element.TryGetProperty(nameof(RequestUri), out property))
{
record.RequestUri = property.GetString();
}
if (element.TryGetProperty(nameof(RequestHeaders), out property))
{
DeserializeHeaders(record.RequestHeaders, property);
}
if (element.TryGetProperty(nameof(RequestBody), out property))
{
record.RequestBody = DeserializeBody(record.RequestHeaders, property);
}
if (element.TryGetProperty(nameof(StatusCode), out property) &&
property.TryGetInt32(out var statusCode))
{
record.StatusCode = statusCode;
}
if (element.TryGetProperty(nameof(ResponseHeaders), out property))
{
DeserializeHeaders(record.ResponseHeaders, property);
}
if (element.TryGetProperty(nameof(ResponseBody), out property))
{
record.ResponseBody = DeserializeBody(record.ResponseHeaders, property);
}
return(record);
}
