title: Google GetAccessToken : Bad Request 400
body: <p>I am using (OpenId+OAuth) hybrid protocol.</p>
  
  <p>After I redirect user to "https://www.google.com/accounts/o8/ud" with all openid and oauth extension parameters, user is able to see login screen and services I need to access. On successfull login I receive response as following:</p>
  
  <p><a href="http://muUrl.com/...&amp;openid.ns.ext2=http://specs.openid.net/extensions/oauth/1.0&amp;openid.ext2.scope=http://docs.google.com/feeds/" rel="nofollow">http://muUrl.com/...&amp;openid.ns.ext2=http://specs.openid.net/extensions/oauth/1.0&amp;openid.ext2.scope=http://docs.google.com/feeds/</a><strong>&amp;openid.ext2.request_token=4/8GCHDIvtxhbg8gVkfYro7QIFakoB</strong></p>
  
  <p>I understand user is properly logged in and text in bold is authorized token. Then I make call for obtaining access token with all parameters <strong>except oauth_verifier</strong> as that is not available in hybrid mode. I sign base string using HMAC-SHA1 with key as "consumersecret&amp;" (token secret is yet not available)</p>
  
  <p>I get 400 bad request with signature invalid. Any help or suggestion is highly appreciated to resolve this issue.</p>