/// <summary>
/// Adds a SHA 256 signature to the <paramref name="body"/> and adds it to the <paramref name="request"/> as an
/// HTTP header to the <see cref="HttpRequestMessage"/> along with the entity body.
/// </summary>
/// <param name="workItem">The current <see cref="WebHookWorkItem"/>.</param>
/// <param name="request">The request to add the signature to.</param>
/// <param name="body">The body to sign and add to the request.</param>
protected virtual void SignWebHookRequest(WebHookWorkItem workItem, HttpRequestMessage request, JObject body)
{
if (workItem == null)
{
throw new ArgumentNullException("workItem");
}
if (workItem.WebHook == null)
{
string msg = string.Format(CustomResource.Sender_BadWorkItem, this.GetType().Name, "WebHook");
throw new ArgumentException(msg, "workItem");
}
if (request == null)
{
throw new ArgumentNullException("request");
}
if (body == null)
{
throw new ArgumentNullException("body");
}
byte[] secret = Encoding.UTF8.GetBytes(workItem.WebHook.Secret);
using (var hasher = new HMACSHA256(secret))
{
string serializedBody = body.ToString();
request.Content = new StringContent(serializedBody, Encoding.UTF8, "application/json");
byte[] data = Encoding.UTF8.GetBytes(serializedBody);
byte[] sha256 = hasher.ComputeHash(data);
string headerValue = string.Format(CultureInfo.InvariantCulture, SignatureHeaderValueTemplate, EncodingUtilities.ToHex(sha256));
request.Headers.Add(SignatureHeaderName, headerValue);
}
}
/// <summary>
/// Adds a SHA 256 signature to the <paramref name="body"/> and adds it to the <paramref name="request"/> as an
/// HTTP header to the <see cref="HttpRequestMessage"/> along with the entity body.
/// </summary>
/// <param name="workItem">The current <see cref="WebHookWorkItem"/>.</param>
/// <param name="request">The request to add the signature to.</param>
/// <param name="body">The body to sign and add to the request.</param>
protected virtual void SignWebHookRequest(WebHookWorkItem workItem, HttpRequestMessage request, JObject body)
{
if (workItem == null)
{
throw new ArgumentNullException(nameof(workItem));
}
if (workItem.WebHook == null)
{
var message = $"Invalid '{GetType().Name}' instance: '{"WebHook"}' cannot be null.";
throw new ArgumentException(message, "workItem");
}
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
if (body == null)
{
throw new ArgumentNullException(nameof(body));
}
var secret = Encoding.UTF8.GetBytes(workItem.WebHook.Secret);
using (var hasher = new HMACSHA256(secret))
{
var serializedBody = body.ToString();
request.Content = new StringContent(serializedBody, Encoding.UTF8, "application/json");
var data = Encoding.UTF8.GetBytes(serializedBody);
var sha256 = hasher.ComputeHash(data);
var headerValue = string.Format(CultureInfo.InvariantCulture, SignatureHeaderValueTemplate, EncodingUtilities.ToHex(sha256));
request.Headers.Add(SignatureHeaderName, headerValue);
}
}
/// <summary>
/// Adds a SHA 256 signature to the <paramref name="body"/> and adds it to the <paramref name="request"/> as an
/// HTTP header to the <see cref="HttpRequestMessage"/> along with the entity body.
/// </summary>
/// <param name="workItem">The current <see cref="WebHookWorkItem"/>.</param>
/// <param name="request">The request to add the signature to.</param>
/// <param name="body">The body to sign and add to the request.</param>
protected virtual void SignWebHookRequest(WebHookWorkItem workItem, HttpRequestMessage request, Stream body)
{
if (workItem == null)
{
throw new ArgumentNullException(nameof(workItem));
}
if (workItem.WebHook == null)
{
var message = string.Format(CultureInfo.CurrentCulture, CustomResources.Sender_BadWorkItem, GetType().Name, "WebHook");
throw new ArgumentException(message, "workItem");
}
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
if (body == null)
{
throw new ArgumentNullException(nameof(body));
}
var secret = Encoding.UTF8.GetBytes(workItem.WebHook.Secret);
using var hasher = new HMACSHA256(secret);
var sha256 = hasher.ComputeHash(body);
var headerValue = string.Format(CultureInfo.InvariantCulture, SignatureHeaderValueTemplate, EncodingUtilities.ToHex(sha256));
request.Headers.Add(SignatureHeaderName, headerValue);
body.Seek(0, SeekOrigin.Begin);
var content = new StreamContent(body);
content.Headers.ContentType = ApplicationJson;
request.Content = content;
}
