public string ToOAuthHeader()
{
var authHeader = new StringBuilder();
authHeader.Append(string.Format("{0} ", OAuthConstants.AUTHORIZATION_OAUTH));
if (!string.IsNullOrEmpty(RequestParameters[OAuthParameter.OAUTH_REALM]))
{
authHeader.Append(string.Format("{0}={1},", OAuthParameter.OAUTH_REALM, OAuthParameter.UrlEncode(RequestParameters[OAuthParameter.OAUTH_REALM])));
}
authHeader.Append(string.Format("{0}={1},", OAuthParameter.OAUTH_CONSUMER_KEY, OAuthParameter.UrlEncode(RequestParameters[OAuthParameter.OAUTH_CONSUMER_KEY])));
if (!string.IsNullOrEmpty(RequestParameters[OAuthParameter.OAUTH_TOKEN]))
{
authHeader.Append(string.Format("{0}={1},", OAuthParameter.OAUTH_TOKEN, OAuthParameter.UrlEncode(RequestParameters[OAuthParameter.OAUTH_TOKEN])));
}
authHeader.Append(string.Format("{0}={1},", OAuthParameter.OAUTH_SIGNATURE_METHOD, OAuthParameter.UrlEncode(RequestParameters[OAuthParameter.OAUTH_SIGNATURE_METHOD])));
authHeader.Append(string.Format("{0}={1},", OAuthParameter.OAUTH_SIGNATURE, OAuthParameter.UrlEncode(RequestParameters[OAuthParameter.OAUTH_SIGNATURE])));
authHeader.Append(string.Format("{0}={1},", OAuthParameter.OAUTH_TIMESTAMP, OAuthParameter.UrlEncode(RequestParameters[OAuthParameter.OAUTH_TIMESTAMP])));
authHeader.Append(string.Format("{0}={1}", OAuthParameter.OAUTH_NONCE, OAuthParameter.UrlEncode(RequestParameters[OAuthParameter.OAUTH_NONCE])));
if (!string.IsNullOrEmpty(RequestParameters[OAuthParameter.OAUTH_VERSION]))
{
authHeader.Append(string.Format(",{0}={1}", OAuthParameter.OAUTH_VERSION, OAuthParameter.UrlEncode(RequestParameters[OAuthParameter.OAUTH_VERSION])));
}
return(authHeader.ToString());
}
private static string GetSortedString(NameValueCollection list)
{
var sb = new StringBuilder();
var keys = list.AllKeys;
Array.Sort(keys);
foreach (var key in keys)
{
var valuesArray = list.GetValues(key);
if (valuesArray == null)
{
continue;
}
Array.Sort(valuesArray);
foreach (var myvalue in valuesArray)
{
sb.Append(OAuthParameter.UrlEncode(key)).Append('=');
sb.Append(OAuthParameter.UrlEncode(myvalue));
sb.Append('&');
}
}
if (sb.Length > 1)
{
sb.Remove(sb.Length - 1, 1);
}
return(sb.ToString());
}
public override string BuildSignature(WebRequest webRequest, IOAuthConsumer consumer, IOAuthToken ioAuthToken)
{
if (consumer == null)
{
throw new ArgumentNullException(ERROR_CONSUMER_NULL);
}
if (ioAuthToken == null)
{
throw new ArgumentNullException(ERROR_TOKEN_NULL);
}
var requestUri = string.Format("{0}://{1}{2}", webRequest.RequestUri.Scheme, webRequest.RequestUri.Authority, webRequest.RequestUri.AbsolutePath);
var request = WebRequest.Create(requestUri);
request.Method = webRequest.Method;
var key = string.Format(FORMAT_PARAMETER, OAuthParameter.UrlEncode(consumer.ConsumerSecret), OAuthParameter.UrlEncode(ioAuthToken.TokenSecret));
HashAlgorithm hashAlgorithm = new HMACSHA1(Encoding.UTF8.GetBytes(key));
var canonicalString = this.GetCanonicalString(request, consumer, ioAuthToken);
var encoded = Encoding.UTF8.GetBytes(canonicalString);
var result = Convert.ToBase64String(hashAlgorithm.ComputeHash(encoded));
return(result);
}
protected string GetCanonicalString(WebRequest webRequest, IOAuthConsumer consumer, IOAuthToken ioAuthToken)
{
if (string.IsNullOrEmpty(webRequest.Method))
{
throw new ArgumentNullException(ERROR_HTTP_METHOD);
}
var stringToSign = new StringBuilder();
stringToSign.Append(webRequest.Method.ToUpper().Trim());
stringToSign.Append(OAuthParameter.QUERYSTRING_SEPERATOR);
//TODO: check if querystring should be part of it
stringToSign.Append(OAuthParameter.UrlEncode(webRequest.RequestUri.AbsoluteUri));
stringToSign.Append(OAuthParameter.QUERYSTRING_SEPERATOR);
if (RequestParameters[OAuthParameter.OAUTH_REALM] != null)
{
RequestParameters.Remove(OAuthParameter.OAUTH_REALM);
}
if (RequestParameters[OAuthParameter.OAUTH_SIGNATURE] != null)
{
RequestParameters.Remove(OAuthParameter.OAUTH_SIGNATURE);
}
//TODO: input correct parameters
if (RequestParameters[OAuthParameter.OAUTH_SIGNATURE_METHOD] == null)
{
RequestParameters.Add(OAuthParameter.OAUTH_SIGNATURE_METHOD, GeneralUtil.SignatureMethodTypeToString(consumer.OAuthSignatureMethod));
}
if (RequestParameters[OAuthParameter.OAUTH_CONSUMER_KEY] == null)
{
RequestParameters.Add(OAuthParameter.OAUTH_CONSUMER_KEY, consumer.ConsumerKey);
}
if (RequestParameters[OAuthParameter.OAUTH_VERSION] == null)
{
RequestParameters.Add(OAuthParameter.OAUTH_VERSION, GeneralUtil.OAuthVersionTypeToString(consumer.OAuthVersion));
}
if (RequestParameters[OAuthParameter.OAUTH_TIMESTAMP] == null)
{
RequestParameters.Add(OAuthParameter.OAUTH_TIMESTAMP, GenerateTimeStamp());
}
if (RequestParameters[OAuthParameter.OAUTH_NONCE] == null)
{
RequestParameters.Add(OAuthParameter.OAUTH_NONCE, GenerateNonce());
}
if (RequestParameters[OAuthParameter.OAUTH_TOKEN] == null && !string.IsNullOrEmpty(ioAuthToken.TokenKey))
{
RequestParameters.Add(OAuthParameter.OAUTH_TOKEN, ioAuthToken.TokenKey);
}
stringToSign.Append(OAuthParameter.UrlEncode(GetNormalizedParameterString(RequestParameters).Trim()));
return(stringToSign.ToString());
}
public override string BuildSignature(WebRequest webRequest, IOAuthConsumer consumer, IOAuthToken ioAuthToken)
{
if (consumer == null)
{
throw new ArgumentNullException(ERROR_CONSUMER_NULL);
}
if (ioAuthToken == null)
{
throw new ArgumentNullException(ERROR_TOKEN_NULL);
}
var result = string.Format(FORMAT_PARAMETER, OAuthParameter.UrlEncode(consumer.ConsumerSecret), OAuthParameter.UrlEncode(ioAuthToken.TokenSecret));
return(result);
}
public override string BuildSignature(WebRequest webRequest, IOAuthConsumer consumer, IOAuthToken ioAuthToken)
{
if (consumer == null)
{
throw new ArgumentNullException(ERROR_CONSUMER_NULL);
}
if (ioAuthToken == null)
{
throw new ArgumentNullException(ERROR_TOKEN_NULL);
}
var key = string.Format(FORMAT_PARAMETER, OAuthParameter.UrlEncode(consumer.ConsumerSecret), OAuthParameter.UrlEncode(ioAuthToken.TokenSecret));
HashAlgorithm hashAlgorithm = new HMACSHA1(Encoding.UTF8.GetBytes(key));
var encoded = Encoding.UTF8.GetBytes(this.GetCanonicalString(webRequest, consumer, ioAuthToken));
var result = Convert.ToBase64String(hashAlgorithm.ComputeHash(encoded));
return(result);
}
public string ToQueryString()
{
return(string.Format(QUERYSTRING_FORMAT, OAUTH_TOKEN, OAuthParameter.UrlEncode(this.TokenKey), OAUTH_TOKEN_SECRET, OAuthParameter.UrlEncode(this.TokenSecret)));
}
