public void ValidateParameters(CallParameters parameters, string consumerTimeStamp, string consumerNonce)
{
if (string.IsNullOrEmpty(parameters.ConsumerKey))
{
ThrowAuthenticationException("Consumer Key must be provided");
}
if (string.IsNullOrEmpty(parameters.ConsumerSecret))
{
ThrowAuthenticationException("Consumer Secret must be provided");
}
if (parameters.HttpMethod == null)
{
ThrowAuthenticationException("Http Method must be provided");
}
if (string.IsNullOrEmpty(parameters.Url))
{
ThrowAuthenticationException("Url must be provided");
}
if (string.IsNullOrEmpty(consumerTimeStamp))
{
ThrowAuthenticationException("Consumer timestamp must be provided");
}
if (string.IsNullOrEmpty(consumerNonce))
{
ThrowAuthenticationException("Consumer nonce must be provided");
}
}
public string GetHashEncodedSignitureFor(CallParameters callParameters, string consumerTimeStamp, string nonce)
{
_oAuthValidator.ValidateParameters(callParameters, consumerTimeStamp, nonce);
var oAuthSigniture = _oAuthSignitureBuilder.Build(callParameters, consumerTimeStamp, nonce);
var hashAlgorithm = _hashAlgorithmBuilder.Build(callParameters.ConsumerSecret, callParameters.TokenSecret);
_oAuthValidator.ValidateSignitureAndAlgorithm(oAuthSigniture, hashAlgorithm);
return oAuthSigniture.ToBase64StringUsingHashAlgorithm(hashAlgorithm);
}
public OAuthSigniture Build(CallParameters callParameters, string consumerTimeStamp, string nonce)
{
var queryParameters = _queryParameterBuilder.Build(callParameters, consumerTimeStamp, nonce);
var normalizedUrl = callParameters.Url.ToNormalizedUrl();
var normalizedRequestParameters = queryParameters.ToNormalizedRequestParameters();
var oAuthSignitureValue = new StringBuilder();
oAuthSignitureValue.AppendFormat("{0}&", callParameters.HttpMethod.ToString().ToUpper());
oAuthSignitureValue.AppendFormat("{0}&", normalizedUrl.UrlEncode());
oAuthSignitureValue.AppendFormat("{0}", normalizedRequestParameters.UrlEncode());
return new OAuthSigniture { Value = oAuthSignitureValue.ToString() };
}
public AuthorizationHeader Build(CallParameters parameters)
{
var currentUnixTime = DateTime.Now - new DateTime(1970, 1, 1, 0, 0, 0, 0);
var consumerTimestamp = Convert.ToInt64(currentUnixTime.TotalSeconds).ToString(CultureInfo.InvariantCulture);
var consumerNonce = new Random().Next(123400, 9999999).ToString(CultureInfo.InvariantCulture);
var encodedOAuthSigniture = _oAuthSignitureProvider.GetHashEncodedSignitureFor(parameters, consumerTimestamp, consumerNonce).UrlEncode();
return new AuthorizationHeader
{
Value = string.Format(
"OAuth realm=\"http://www.opentable.com/, oauth_consumer_key=\"{0}\", oauth_signature_method=\"HMAC-SHA1\", oauth_signature=\"{1}\", oauth_timestamp=\"{2}\", oauth_token=\"\", oauth_nonce=\"{3}\", oauth_version=\"1.0\"",
parameters.ConsumerKey, encodedOAuthSigniture, consumerTimestamp, consumerNonce)
};
}
public IList<QueryParameter> Build(CallParameters callParameters, string consumerTimeStamp, string nonce)
{
var outcome = new List<QueryParameter>();
var queryStringParameters = callParameters.Url.ToApiQuerystringParameters();
if (!string.IsNullOrEmpty(queryStringParameters))
{
var p = queryStringParameters.Split('&');
foreach (var s in p)
{
if (!string.IsNullOrEmpty(s) && !s.StartsWith(OAuthConstants.OAuthParameterPrefix))
{
if (s.IndexOf('=') > -1)
{
var temp = s.Split('=');
outcome.Add(new QueryParameter(temp[0], temp[1]));
}
else
{
outcome.Add(new QueryParameter(s, string.Empty));
}
}
}
}
outcome.Add(new QueryParameter(OAuthConstants.OAuthVersionKey, OAuthConstants.OAuthVersion));
outcome.Add(new QueryParameter(OAuthConstants.OAuthNonceKey, nonce));
outcome.Add(new QueryParameter(OAuthConstants.OAuthTimestampKey, consumerTimeStamp));
outcome.Add(new QueryParameter(OAuthConstants.OAuthSignatureMethodKey, "HMAC-SHA1"));
outcome.Add(new QueryParameter(OAuthConstants.OAuthConsumerKeyKey, callParameters.ConsumerKey));
outcome.Add(new QueryParameter(OAuthConstants.OAuthTokenKey, callParameters.Token));
outcome.Sort(new QueryParameterComparer());
return outcome;
}