I'm trying to get access token to Authenticate Google Service Account using below code. This code is returning a token. I tried to access the APIs from Postman with the token I received, however getting error as "Invalid IAP credentials: Base64 decode failed on token:". Just FYI, I'm using Google's OAuth library for .NET.
This is the token I received
ya29.c.Ko4B4Act579buZYyeoPgvOwuKREoi981lSLUQxA03SzAPGQuPY9Z3CXSnkouFdO4wj1lRwhGJxCLlnLlVsmLBySYf1VWQIbtSf8wMbIzW5b7n6mXeQgb-xk8SXwNZsLqxHprGlj-Zr35YrvoBzQPE6_OEQSD7g90g3Y-3DDnkCqs1m_K-udBVIVVYJ3lDQ
Code
class Program
{
public const string SCOPE_READONLY = "https://www.googleapis.com/auth/userinfo.profile";
public const string KEYFILE_PATH_READONLY = @"../../keys/XXXjson";
public const string CLIENT_EMAIL_READONLY = "[email protected]";
static void Main(string[] args)
{
var token = GoogleServiceAccount.GetAccessTokenFromJSONKey(
KEYFILE_PATH_READONLY,
SCOPE_READONLY);
Console.WriteLine(token);
}
}
.
public class GoogleServiceAccount
{
/// <summary>
/// Get Access Token From JSON Key Async
/// </summary>
/// <param name="jsonKeyFilePath">Path to your JSON Key file</param>
/// <param name="scopes">Scopes required in access token</param>
/// <returns>Access token as string Task</returns>
public static async Task<string> GetAccessTokenFromJSONKeyAsync(string jsonKeyFilePath, params string[] scopes)
{
using (var stream = new FileStream(jsonKeyFilePath, FileMode.Open, FileAccess.Read))
{
return await GoogleCredential
.FromStream(stream) // Loads key file
.CreateScoped(scopes) // Gathers scopes requested
.UnderlyingCredential // Gets the credentials
.GetAccessTokenForRequestAsync("https://accounts.google.com/o/oauth2/auth"); // Gets the Access Token
}
}
/// <summary>
/// Get Access Token From JSON Key
/// </summary>
/// <param name="jsonKeyFilePath">Path to your JSON Key file</param>
/// <param name="scopes">Scopes required in access token</param>
/// <returns>Access token as string</returns>
public static string GetAccessTokenFromJSONKey(string jsonKeyFilePath, params string[] scopes)
{
return GetAccessTokenFromJSONKeyAsync(jsonKeyFilePath, scopes).Result;
}
}
