protected override async Task ProcessRequestAsync(HttpWebRequest request, Dictionary <string, object> payload)
{
if (payload == null || PrivateApiKey == null || PublicApiKey == null || !payload.ContainsKey("nonce"))
{
await CryptoUtility.WritePayloadFormToRequestAsync(request, payload);
}
else
{
string nonce = payload["nonce"].ToStringInvariant();
payload.Remove("nonce");
string form = CryptoUtility.GetFormForPayload(payload);
// nonce must be first on Kraken
form = "nonce=" + nonce + (string.IsNullOrWhiteSpace(form) ? string.Empty : "&" + form);
using (SHA256 sha256 = SHA256Managed.Create())
{
string hashString = nonce + form;
byte[] sha256Bytes = sha256.ComputeHash(Encoding.UTF8.GetBytes(hashString));
byte[] pathBytes = Encoding.UTF8.GetBytes(request.RequestUri.AbsolutePath);
byte[] sigBytes = new byte[sha256Bytes.Length + pathBytes.Length];
pathBytes.CopyTo(sigBytes, 0);
sha256Bytes.CopyTo(sigBytes, pathBytes.Length);
byte[] privateKey = System.Convert.FromBase64String(CryptoUtility.ToUnsecureString(PrivateApiKey));
using (System.Security.Cryptography.HMACSHA512 hmac = new System.Security.Cryptography.HMACSHA512(privateKey))
{
string sign = System.Convert.ToBase64String(hmac.ComputeHash(sigBytes));
request.Headers.Add("API-Sign", sign);
}
}
request.Headers.Add("API-Key", CryptoUtility.ToUnsecureString(PublicApiKey));
await CryptoUtility.WriteToRequestAsync(request, form);
}
}
protected override async Task ProcessRequestAsync(HttpWebRequest request, Dictionary <string, object> payload)
{
if (CanMakeAuthenticatedRequest(payload))
{
if (string.IsNullOrWhiteSpace(CustomerId))
{
throw new APIException("Customer ID is not set for Bitstamp");
}
// messageToSign = nonce + customer_id + api_key
string apiKey = PublicApiKey.ToUnsecureString();
string messageToSign = payload["nonce"].ToStringInvariant() + CustomerId + apiKey;
string signature = CryptoUtility.SHA256Sign(messageToSign, PrivateApiKey.ToUnsecureString()).ToUpperInvariant();
payload["signature"] = signature;
payload["key"] = apiKey;
await CryptoUtility.WritePayloadFormToRequestAsync(request, payload);
}
}