/**
* Computes OAuth Signature as per OAuth specification using signature
* Method. using the specified encoding scheme {@code enc}.
* <p>
*
* @return the Base64 encoded string.
* @throws OAuthException
* if invalid arguments.
*/
public string ComputeSignature()
{
if (ConsumerSecret == null || ConsumerSecret.Length == 0)
{
throw new OAuthException("Consumer Secret or key not set.");
}
if (Token == "" || TokenSecret.Length == 0 || RequestURI == "" ||
TokenTimestamp == "")
{
throw new OAuthException(
"AuthToken or TokenSecret or Request URI or Timestamp not set.");
}
string signature = "";
try
{
string consumerSec = System.Text.Encoding.GetEncoding(ENCODING_METHOD).GetString(ConsumerSecret);
//TODO: Why encode consumersecret twice?
string key = PayPalURLEncoder.Encode(consumerSec, ENCODING_METHOD);
key += PARAM_DELIMETER;
string tokenSec = System.Text.Encoding.GetEncoding(ENCODING_METHOD).GetString(TokenSecret);
key += PayPalURLEncoder.Encode(tokenSec, ENCODING_METHOD);
StringBuilder paramString = new StringBuilder();
ArrayList oAuthParams = QueryParams;
oAuthParams.Add(new Parameter("oauth_consumer_key", ConsumerKey));
oAuthParams.Add(new Parameter("oauth_version", OAUTH_VERSION));
oAuthParams.Add(new Parameter("oauth_signature_method", OAUTH_SIGNATURE_METHOD));
oAuthParams.Add(new Parameter("oauth_token", Token));
oAuthParams.Add(new Parameter("oauth_timestamp", TokenTimestamp));
oAuthParams.Sort();
int numParams = oAuthParams.Count - 1;
for (int counter = 0; counter <= numParams; counter++)
{
Parameter current = (Parameter)oAuthParams[counter];
paramString.Append(current.ParameterName).Append(PARAM_SEPERATOR).Append(current.ParameterValue);
if (counter < numParams)
{
paramString.Append(PARAM_DELIMETER);
}
}
string signatureBase = this.HttpMethod + PARAM_DELIMETER;
signatureBase += PayPalURLEncoder.Encode(RequestURI, ENCODING_METHOD) + PARAM_DELIMETER;
signatureBase += PayPalURLEncoder.Encode(paramString.ToString(), ENCODING_METHOD);
Encoding encoding = System.Text.Encoding.ASCII;
byte[] encodedKey = encoding.GetBytes(key);
using (HMACSHA1 keyDigest = new HMACSHA1(encodedKey))
{
Encoding encoding1 = System.Text.Encoding.ASCII;
byte[] SignBase = encoding1.GetBytes(signatureBase);
byte[] digest = keyDigest.ComputeHash(SignBase);
signature = System.Convert.ToBase64String(digest);
}
}
catch (System.Exception e)
{
throw new OAuthException(e.Message, e);
}
return(signature);
}
/// <summary>
/// Computes OAuth Signature as per OAuth specification using signature
/// </summary>
/// <returns></returns>
public string ComputeSignature()
{
if (consumerSecret == null || consumerSecret.Length == 0)
{
throw new OAuthException("Consumer Secret or key not set.");
}
if (token == string.Empty || tokenSecret.Length == 0 ||
requestURI == string.Empty || tokenTimestamp == string.Empty)
{
throw new OAuthException(
"AuthToken or TokenSecret or Request URI or Timestamp not set.");
}
string signature = string.Empty;
try
{
string consumerSec = System.Text.Encoding.GetEncoding(method).GetString(consumerSecret);
//TODO: Why encode consumersecret twice?
string key = PayPalURLEncoder.Encode(consumerSec, method);
key += delimiter;
string tokenSec = System.Text.Encoding.GetEncoding(method).GetString(tokenSecret);
key += PayPalURLEncoder.Encode(tokenSec, method);
StringBuilder paramString = new StringBuilder();
ArrayList oAuthParams = queryParameters;
oAuthParams.Add(new Parameter("oauth_consumer_key", consumerKey));
oAuthParams.Add(new Parameter("oauth_version", version));
oAuthParams.Add(new Parameter("oauth_signature_method", authentication));
oAuthParams.Add(new Parameter("oauth_token", token));
oAuthParams.Add(new Parameter("oauth_timestamp", tokenTimestamp));
oAuthParams.Sort();
int numParams = oAuthParams.Count - 1;
for (int counter = 0; counter <= numParams; counter++)
{
Parameter current = (Parameter)oAuthParams[counter];
paramString.Append(current.ParameterName).Append(separator).Append(current.ParameterValue);
if (counter < numParams)
{
paramString.Append(delimiter);
}
}
string signatureBase = this.methodHTTP + delimiter;
signatureBase += PayPalURLEncoder.Encode(requestURI, method) + delimiter;
signatureBase += PayPalURLEncoder.Encode(paramString.ToString(), method);
Encoding encoding = System.Text.Encoding.ASCII;
byte[] encodedKey = encoding.GetBytes(key);
using (HMACSHA1 keyDigest = new HMACSHA1(encodedKey))
{
Encoding encoding1 = System.Text.Encoding.ASCII;
byte[] SignBase = encoding1.GetBytes(signatureBase);
byte[] digest = keyDigest.ComputeHash(SignBase);
signature = System.Convert.ToBase64String(digest);
}
}
catch (System.Exception e)
{
throw new OAuthException(e.Message, e);
}
return(signature);
}
