private DaikinUniversityApiSignature GenerateRequestAPISessionSignature(HttpMethod method, string apiRelativeUrl, HttpRequestHeaders headers)
{
StringBuilder sbToSign = new StringBuilder();
// Get all the x-csod headers that we must include in signature except the signature itself
var csodHeaders = headers.Where(w => w.Key.StartsWith("x-csod-") &&
w.Key != "x-csod-signature")
.Select(sm => new
{
Key = sm.Key,
Value = sm.Value.Aggregate(string.Empty, (a, l) => a.Trim() + l.Trim())
})
.Distinct()
.OrderBy(o => o.Key);
sbToSign.Append(method);
foreach (var csodHeader in csodHeaders)
{
sbToSign.AppendFormat("\n{0}:{1}", csodHeader.Key, csodHeader.Value);
}
sbToSign.Append("\n").Append(apiRelativeUrl);
var signature = new DaikinUniversityApiSignature()
{
ApiSecret = SessionToken != null ? SessionToken.Secret : ConfigApiSecret,
RequestedSignature = sbToSign.ToString()
};
byte[] secretKeyBytes = Convert.FromBase64String(signature.ApiSecret);
byte[] inputBytes = Encoding.UTF8.GetBytes(sbToSign.ToString());
using (var hmac = new HMACSHA512(secretKeyBytes))
{
byte[] hashValue = hmac.ComputeHash(inputBytes);
signature.Signature = Convert.ToBase64String(hashValue);
}
return(signature);
}
private HttpRequestMessage GenerateRequestApplyAPISignature(HttpRequestMessage reqMsg, DaikinUniversityApiSignature signature)
{
reqMsg.Headers.Add("x-csod-signature", signature.Signature);
return(reqMsg);
}
