public void LoadFromFile(String cacheId)
{
try
{
System.Reflection.Assembly asm = System.Reflection.Assembly.GetAssembly(this.GetType());
String tokenFile = Path.GetFullPath(asm.Location) + "-" + cacheId + ".gToken";
if (!File.Exists(tokenFile))
{
return;
}
String jData = File.ReadAllText(tokenFile, Encoding.UTF8);
GoogleAccessToken item = JSON.Deserialize <GoogleAccessToken>(jData);
this.access_token = item.access_token;
this.token_type = item.token_type;
this.create_time = item.create_time;
this.error = item.error;
this.expires_in = item.expires_in;
this.customer_id = item.customer_id;
}
catch {
return;
}
}
public static GoogleAccessToken GetAccessToken(String base64CertData, String clientIdEMail, String scope, String adminDelegatedEmail, JSON.DebugMessage dbg)
{
try
{
if ((base64CertData == null) || (base64CertData == ""))
{
throw new Exception("Certificate data is empty");
}
// certificate
var certificate = new X509Certificate2(Convert.FromBase64String(base64CertData), "notasecret");
// header
var header = new { typ = "JWT", alg = "RS256" };
// claimset
var times = GetExpiryAndIssueDate(dbg);
var claimset = new
{
iss = clientIdEMail,
prn = adminDelegatedEmail, //Ver comentário abaixo
scope = scope,
aud = "https://accounts.google.com/o/oauth2/token",
iat = times[0],
exp = times[1],
};
if (dbg != null)
{
try { dbg("iat", times[0].ToString() + " ==> " + new DateTime(1970, 1, 1, 0, 0, 0, 0).AddSeconds(times[0]).ToString("yyyy-MM-dd HH:mm:ss")); }
catch { }
}
;
if (dbg != null)
{
try { dbg("exp", times[1].ToString() + " ==> " + new DateTime(1970, 1, 1, 0, 0, 0, 0).AddSeconds(times[1]).ToString("yyyy-MM-dd HH:mm:ss")); }
catch { }
}
;
/* The email address of the user for which the application is requesting delegated access.
* Sem colocar este parâmetro o Token é gerado, porém ao listar os usuário apresenta o erro:
* (403) - Not Authorized to access this resource/api
*/
JavaScriptSerializer ser = new JavaScriptSerializer();
// encoded header
var headerSerialized = ser.Serialize(header);
var headerBytes = Encoding.UTF8.GetBytes(headerSerialized);
var headerEncoded = Convert.ToBase64String(headerBytes);
// encoded claimset
var claimsetSerialized = ser.Serialize(claimset);
var claimsetBytes = Encoding.UTF8.GetBytes(claimsetSerialized);
var claimsetEncoded = Convert.ToBase64String(claimsetBytes);
// input
var input = headerEncoded + "." + claimsetEncoded;
var inputBytes = Encoding.UTF8.GetBytes(input);
// signiture
var rsa = certificate.PrivateKey as RSACryptoServiceProvider;
var cspParam = new CspParameters
{
KeyContainerName = rsa.CspKeyContainerInfo.KeyContainerName,
KeyNumber = rsa.CspKeyContainerInfo.KeyNumber == KeyNumber.Exchange ? 1 : 2
};
var aescsp = new RSACryptoServiceProvider(cspParam)
{
PersistKeyInCsp = false
};
var signatureBytes = aescsp.SignData(inputBytes, "SHA256");
var signatureEncoded = Convert.ToBase64String(signatureBytes);
// jwt
var jwt = headerEncoded + "." + claimsetEncoded + "." + signatureEncoded;
var client = new WebClient();
client.Encoding = Encoding.UTF8;
var uri = "https://accounts.google.com/o/oauth2/token";
var content = new NameValueCollection();
content["assertion"] = jwt;
content["grant_type"] = "urn:ietf:params:oauth:grant-type:jwt-bearer";
string jData = "";
if (dbg != null)
{
try { dbg("JWT", jwt); }
catch { }
}
;
try
{
jData = Encoding.UTF8.GetString(client.UploadValues(uri, "POST", content));
if (dbg != null)
{
try{ dbg("Return", jData); } catch {}
}
;
}
catch (Exception ex)
{
if (dbg != null)
{
try { dbg("Error: " + ex.Message, ""); }
catch { }
}
;
try
{
if (ex is WebException)
{
using (WebResponse response = ((WebException)ex).Response)
{
HttpWebResponse httpResponse = (HttpWebResponse)response;
using (Stream data = response.GetResponseStream())
using (var reader = new StreamReader(data))
{
jData = reader.ReadToEnd();
}
}
}
}
catch {
GoogleAccessToken err = new GoogleAccessToken();
err.error = ex.Message;
jData = JSON.Serialize <GoogleAccessToken>(err);
}
}
if (dbg != null)
{
try { dbg("Return", jData); }
catch { }
}
;
return(JSON.Deserialize <GoogleAccessToken>(jData));
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("Erro on GetAccessToken: " + ex.Message);
throw ex;
}
}