我正在尝试通过服务器到服务器方法与我的应用程序启用的BigQuery API进行通信。
我已经勾选了Google guide上的所有方框,以便在C#中尽可能地构建我的JWT。
我对Base64Url编码了所有必要的内容。
然而,我从谷歌获得的唯一回应是400 Bad Request
"error" : "invalid_request"
我从其他SO问题中确认了以下所有问题:
当我使用Fiddler时,我得到了相同的结果。错误消息令人沮丧地缺乏细节!我还能尝试什么?!这是我的代码:
class Program
{
static void Main(string[] args)
{
// certificate
var certificate = new X509Certificate2(@"<Path to my certificate>.p12", "notasecret");
// header
var header = new { typ = "JWT", alg = "RS256" };
// claimset
var times = GetExpiryAndIssueDate();
var claimset = new
{
iss = "<email address of the client id of my app>",
scope = "https://www.googleapis.com/auth/bigquery",
aud = "https://accounts.google.com/o/oauth2/token",
iat = times[0],
exp = times[1],
};
// encoded header
var headerSerialized = JsonConvert.SerializeObject(header);
var headerBytes = Encoding.UTF8.GetBytes(headerSerialized);
var headerEncoded = Base64UrlEncode(headerBytes);
// encoded claimset
var claimsetSerialized = JsonConvert.SerializeObject(claimset);
var claimsetBytes = Encoding.UTF8.GetBytes(claimsetSerialized);
var claimsetEncoded = Base64UrlEncode(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 = Base64UrlEncode(signatureBytes);
// jwt
var jwt = headerEncoded + "." + claimsetEncoded + "." + signatureEncoded;
Console.WriteLine(jwt);
var client = new HttpClient();
var uri = "https://accounts.google.com/o/oauth2/token";
var post = new Dictionary<string, string>
{
{"assertion", jwt},
{"grant_type", "urn%3Aietf%3Aparams%3Aoauth%3Agrant-type%3Ajwt-bearer"}
};
var content = new FormUrlEncodedContent(post);
var result = client.PostAsync(uri, content).Result;
Console.WriteLine(result);
Console.WriteLine(result.Content.ReadAsStringAsync().Result);
Console.ReadLine();
}
private static int[] GetExpiryAndIssueDate()
{
var utc0 = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
var issueTime = DateTime.Now;
var iat = (int)issueTime.Subtract(utc0).TotalSeconds;
var exp = (int)issueTime.AddMinutes(55).Subtract(utc0).TotalSeconds;
return new[]{iat, exp};
}
private static string Base64UrlEncode(byte[] input)
{
var output = Convert.ToBase64String(input);
output = output.Split('=')[0]; // Remove any trailing '='s
output = output.Replace('+', '-'); // 62nd char of encoding
output = output.Replace('/', '_'); // 63rd char of encoding
return output;
}
}
答案 0 :(得分:13)
看起来我在上面评论中的猜测是正确的。我通过更改代码来运行代码:
"urn%3Aietf%3Aparams%3Aoauth%3Agrant-type%3Ajwt-bearer"
为:
"urn:ietf:params:oauth:grant-type:jwt-bearer"
看起来你不小心对它进行了双重编码。
我现在得到的答案看起来像是:
{
"access_token" : "1/_5pUwJZs9a545HSeXXXXXuNGITp1XtHhZXXxxyyaacqkbc",
"token_type" : "Bearer",
"expires_in" : 3600
}
编辑注意:请确保您的服务器上有正确的日期/时间/时区/ dst配置。将时钟关闭几秒钟将导致invalid_grant
错误。 http://www.time.gov将给出美国政府的官方时间,包括UTC。
答案 1 :(得分:5)
请务必在GetExpiryAndIssueDate方法中使用DateTime.UtcNow而不是DateTime.Now。