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POGoogle OAuth from Windows Phone invalid signature
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  1. POGoogle OAuth from Windows Phone invalid signature
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    copied!<p>I've spent the past couple nights on this, and it's driving me mad. Hopefully someone can shed some light on this.</p> <p>I'm trying to write a Windows Phone 7 app to connect to Google. The OAuth routine is really giving me trouble.</p> <p>I've seen quite a few twitter examples, but nothing specific to Google. The code is below - every time I make the request, Google says 'invalid signature.' The base URLs match, everything seems kosher - but it refuses to take it.</p> <pre><code>string baseReqUrl = "https://www.google.com/accounts/OAuthGetRequestToken"; string oauth_consumer_key = "CONSUMER_KEY"; string oauth_consumer_secret = "CONSUMER_SECRET"; string oauth_nonce = OAuthLibrary.OAuth.CreateNonce(); string oauth_signature_method = "HMAC-SHA1"; long oauth_timestamp = OAuthLibrary.OAuth.CreateTimestamp(); //string scope = "https%3A%2F%2Fwww.google.com%2Fanalytics%2Ffeeds%2F"; string scope = "https://www.google.com/analytics/feeds/"; string oauth_callback = "oob"; List&lt;string&gt; sig = new List&lt;string&gt;(); sig.Add(baseReqUrl); sig.Add("oauth_callback=" + oauth_callback); sig.Add("oauth_conusmer_key=" + oauth_consumer_key); sig.Add("oauth_nonce=" + oauth_nonce); sig.Add("oauth_signature_method=" + oauth_signature_method); sig.Add("oauth_timestamp=" + oauth_timestamp.ToString()); sig.Add("scope=" + scope); string baseReq = "GET"; int i = 0; foreach (string s in sig) { if (i == 1) { baseReq = baseReq + "?" + s; } else { baseReq = baseReq + "&amp;" + s; } i++; } HMACSHA1 h = new HMACSHA1(Encoding.UTF8.GetBytes(oauth_consumer_secret)); OAuth.OAuthBase b = new OAuth.OAuthBase(); string normalizedUrl = string.Empty; string normalizedRequestParameters = string.Empty; string sigBase = b.GenerateSignatureBase(new Uri(baseReq.Substring(4)), oauth_consumer_key, null, null, "GET", oauth_timestamp.ToString(), oauth_nonce, "HMAC-SHA1", out normalizedUrl, out normalizedRequestParameters); string signature = b.GenerateSignatureUsingHash(sigBase, h); string reqUrl = normalizedUrl + "?" + normalizedRequestParameters + "&amp;oauth_signature=" + signature; GetUrl(reqUrl); //this line just makes the request </code></pre>
 

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