public HMACAuthrizationDelegatingHandler(IHashKeys hashKeys)
{
_hashKeys = hashKeys;
_signer = new Signer();
_authHeaderSerializer = new AuthorisationHeaderSerializer();
InnerHandler = new HttpClientHandler();
}
public string Sign(string requestUrl, string httpMethod, byte[] requestBody, IAuthorizationHeader authHeader, IHashKeys hashKeys)
{
var encodedContent = string.Empty;
var hash = ComputeHash(hashKeys.HashAlgorithm, requestBody);
if (hash != null)
{
encodedContent = Convert.ToBase64String(hash);
}
var data = $"{hashKeys.APPId}{httpMethod}{requestUrl}{authHeader.Epoch}{authHeader.Nonce}{encodedContent}";
var calcSignature = Encoding.UTF8.GetBytes(data);
using (var hmac = HMAC.Create(hashKeys.HmacAlgorithm))
{
hmac.Key = Convert.FromBase64String(hashKeys.ApiKey);
var signatureBytes = hmac.ComputeHash(calcSignature);
return(Convert.ToBase64String(signatureBytes));
}
}
public async Task <string> SignAsync(HttpRequestMessage request, IAuthorizationHeader authHeader, IHashKeys hashKeys)
{
var requestContentBase64String = string.Empty;
#if NETSTANDARD2_0
var requestUrl = System.Web.HttpUtility.UrlEncode(request.RequestUri.AbsoluteUri.ToLower());
#else
var requestUrl = System.Uri.EscapeDataString(request.RequestUri.AbsoluteUri.ToLower());
#endif
var httpMethod = request.Method.Method;
byte[] content = null;
if (request.Content != null)
{
content = await request.Content.ReadAsByteArrayAsync();
}
return(Sign(requestUrl, httpMethod, content, authHeader, hashKeys));
}