private string GetSignature(
Uri uri, string consumerSecret, string tokenSecret,
string joinedParam, OAuthSigType sigType,
string requestMethod)
{
switch (sigType)
{
case OAuthSigType.PlainText:
return HttpUtility.UrlEncode(consumerSecret + "&" + tokenSecret);
case OAuthSigType.Hmac_Sha1:
if (String.IsNullOrEmpty(requestMethod))
throw new ArgumentNullException("httpMethod");
//URLのフォーマット
var regularUrl = uri.Scheme + "://" + uri.Host;
if (!((uri.Scheme == "http" && uri.Port == 80) || (uri.Scheme == "https" && uri.Port == 443)))
regularUrl += ":" + uri.Port;
regularUrl += uri.AbsolutePath;
//シグネチャの生成
StringBuilder SigSource = new StringBuilder();
SigSource.Append(UrlEncode(requestMethod.ToUpper(), Encoding.UTF8, true) + "&");
SigSource.Append(UrlEncode(regularUrl, Encoding.UTF8, true) + "&");
SigSource.Append(UrlEncode(joinedParam, Encoding.UTF8, true));
//ハッシュの計算
using (HMACSHA1 hmacsha1 = new HMACSHA1())
{
hmacsha1.Key = Encoding.ASCII.GetBytes(string.Format("{0}&{1}", UrlEncode(consumerSecret, Encoding.UTF8, true), string.IsNullOrEmpty(tokenSecret) ? "" : UrlEncode(tokenSecret, Encoding.UTF8, true)));
return UrlEncode(ComputeHash(hmacsha1, SigSource.ToString()), Encoding.UTF8, false);
}
case OAuthSigType.Rsa_Sha1:
throw new NotImplementedException();
default:
throw new ArgumentException("Unknown signature type", "signatureType");
}
}
private IEnumerable<KeyValuePair<string, string>> AddOAuthParams(IEnumerable<KeyValuePair<string, string>> origParam,
string consumerKey, string token,
string timeStamp, string nonce, OAuthSigType sigType, string verifier)
{
if (String.IsNullOrEmpty(consumerKey))
throw new ArgumentNullException("consumerKey");
var np = new List<KeyValuePair<string, string>>();
if (origParam != null)
np.AddRange(origParam);
np.Add(new KeyValuePair<string, string>(VersionKey, Version));
np.Add(new KeyValuePair<string, string>(NonceKey, nonce));
np.Add(new KeyValuePair<string, string>(TimestampKey, timeStamp));
np.Add(new KeyValuePair<string, string>(SignatureMethodKey, sigType.GetString()));
np.Add(new KeyValuePair<string, string>(ConsumerKeyKey, consumerKey));
if (!String.IsNullOrEmpty(verifier))
np.Add(new KeyValuePair<string, string>(VerifierKey, verifier));
if (!String.IsNullOrEmpty(token))
np.Add(new KeyValuePair<string, string>(TokenKey, token));
return np;
}
