private async Task <HttpRequestMessage> BuildRequestMessage(HttpMethod method, Uri requestUri, HttpContent content,
IMacService rsaPublicService, string signatureKey, string aesKey, string aesIv)
{
var requestMessage = new HttpRequestMessage
{
Method = method,
RequestUri = requestUri,
Content = content
};
//Timestamp
var timestamp = (DateTime.UtcNow - SSLConstants.Timestamp_StartUtcDateTime).TotalMilliseconds;
var timestampStr = Convert.ToInt64(timestamp).ToString();
requestMessage.Headers.Add(SSLConstants.HttpHeaders_Timestamp, timestampStr);
//SignatureKey
var encryptSignatureKey = rsaPublicService.Encrypt(signatureKey);
requestMessage.Headers.Add(SSLConstants.HttpHeaders_SignatureKey, encryptSignatureKey);
var shaService = GetSHAService(signatureKey);
//Signature
var signature = CalcRequestSignature(requestMessage, timestampStr, shaService);
requestMessage.Headers.Add(SSLConstants.HttpHeaders_Signature, signature);
//Securitykey
var securityKey = $"{aesKey}||{aesIv}";
var encryptSecurityKey = rsaPublicService.Encrypt(securityKey);
requestMessage.Headers.Add(SSLConstants.HttpHeaders_SecurityKey, encryptSecurityKey);
//Encrypt Content
var aesService = GetAESService(aesKey, aesIv);
requestMessage.Content = await EncryptRequestContent(requestMessage, aesService);
return(requestMessage);
}
private static string CalcResponseSignature(HttpResponseMessage response, string timestamp, IMacService shaService)
{
var sourceStr = $"{(int)response.StatusCode} {timestamp}";
return(shaService.Encrypt(sourceStr));
}
private static string CalcRequestSignature(HttpRequestMessage request, string timestamp, IMacService shaService)
{
var sourceStr = $"{request.Method.Method.ToUpper()} {request.RequestUri.AbsolutePath} {timestamp}";
return(shaService.Encrypt(sourceStr));
}