我觉得我在这里服用了疯狂的药丸.通常，对于任何给定的任务，网络上总是有一百万个库和样本.我正在尝试通过使用 JSON Web 令牌 (JWT) 来使用 Google服务帐户"实现身份验证，如 这里.
但是，只有 PHP、Python 和 Java 中的客户端库.即使在 Google 的身份验证之外搜索 JWT 示例，关于 JWT 的概念也只有蟋蟀和草稿.这真的很新，而且可能是谷歌专有系统吗?
我能解释的最接近的 java 示例看起来非常密集且令人生畏.C# 中必须有一些我至少可以开始的东西.对此的任何帮助都会很棒！
解决方案谢谢大家.我找到了一个 Json Web Token 的基本实现，并用 Google 风格对其进行了扩展.我还没有完全解决它，但它已经完成了 97%.这个项目失去了动力，所以希望这将有助于其他人获得良好的开端:
注意:我对基本实现所做的更改(不记得我在哪里找到的)是:
However there is only client libraries in PHP, Python, and Java. Even searching for JWT examples outside of Google's authentication, there is only crickets and drafts on the JWT concept. Is this really so new and possibly a Google proprietary system?
The java sample which is the closest I could manage to interpret looks pretty intensive and intimidating. There's got to be something out there in C# that I could at least start with. Any help with this would be great!
解决方案Thanks everyone. I found a base implementation of a Json Web Token and expanded on it with the Google flavor. I still haven't gotten it completely worked out but it's 97% there. This project lost it's steam, so hopefully this will help someone else get a good head-start:
Note: Changes I made to the base implementation (Can't remember where I found it,) are:
public enum JwtHashAlgorithm { RS256, HS384, HS512 } public class JsonWebToken { private static Dictionary<JwtHashAlgorithm, Func<byte[], byte[], byte[]>> HashAlgorithms; static JsonWebToken() { HashAlgorithms = new Dictionary<JwtHashAlgorithm, Func<byte[], byte[], byte[]>> { { JwtHashAlgorithm.RS256, (key, value) => { using (var sha = new HMACSHA256(key)) { return sha.ComputeHash(value); } } }, { JwtHashAlgorithm.HS384, (key, value) => { using (var sha = new HMACSHA384(key)) { return sha.ComputeHash(value); } } }, { JwtHashAlgorithm.HS512, (key, value) => { using (var sha = new HMACSHA512(key)) { return sha.ComputeHash(value); } } } }; } public static string Encode(object payload, string key, JwtHashAlgorithm algorithm) { return Encode(payload, Encoding.UTF8.GetBytes(key), algorithm); } public static string Encode(object payload, byte[] keyBytes, JwtHashAlgorithm algorithm) { var segments = new List<string>(); var header = new { alg = algorithm.ToString(), typ = "JWT" }; byte[] headerBytes = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(header, Formatting.None)); byte[] payloadBytes = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(payload, Formatting.None)); //byte[] payloadBytes = Encoding.UTF8.GetBytes(@"{"iss":"761326798069-r5mljlln1rd4lrbhg75efgigp36m78j5@developer.gserviceaccount","scope":"www.googleapis/auth/prediction","aud":"accounts.google/o/oauth2/token","exp":1328554385,"iat":1328550785}"); segments.Add(Base64UrlEncode(headerBytes)); segments.Add(Base64UrlEncode(payloadBytes)); var stringToSign = string.Join(".", segments.ToArray()); var bytesToSign = Encoding.UTF8.GetBytes(stringToSign); byte[] signature = HashAlgorithms[algorithm](keyBytes, bytesToSign); segments.Add(Base64UrlEncode(signature)); return string.Join(".", segments.ToArray()); } public static string Decode(string token, string key) { return Decode(token, key, true); } public static string Decode(string token, string key, bool verify) { var parts = token.Split('.'); var header = parts[0]; var payload = parts[1]; byte[] crypto = Base64UrlDecode(parts[2]); var headerJson = Encoding.UTF8.GetString(Base64UrlDecode(header)); var headerData = JObject.Parse(headerJson); var payloadJson = Encoding.UTF8.GetString(Base64UrlDecode(payload)); var payloadData = JObject.Parse(payloadJson); if (verify) { var bytesToSign = Encoding.UTF8.GetBytes(string.Concat(header, ".", payload)); var keyBytes = Encoding.UTF8.GetBytes(key); var algorithm = (string)headerData["alg"]; var signature = HashAlgorithms[GetHashAlgorithm(algorithm)](keyBytes, bytesToSign); var decodedCrypto = Convert.ToBase64String(crypto); var decodedSignature = Convert.ToBase64String(signature); if (decodedCrypto != decodedSignature) { throw new ApplicationException(string.Format("Invalid signature. Expected {0} got {1}", decodedCrypto, decodedSignature)); } } return payloadData.ToString(); } private static JwtHashAlgorithm GetHashAlgorithm(string algorithm) { switch (algorithm) { case "RS256": return JwtHashAlgorithm.RS256; case "HS384": return JwtHashAlgorithm.HS384; case "HS512": return JwtHashAlgorithm.HS512; default: throw new InvalidOperationException("Algorithm not supported."); } } // from JWT spec 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; } // from JWT spec private static byte[] Base64UrlDecode(string input) { var output = input; output = output.Replace('-', '+'); // 62nd char of encoding output = output.Replace('_', '/'); // 63rd char of encoding switch (output.Length % 4) // Pad with trailing '='s { case 0: break; // No pad chars in this case case 2: output += "=="; break; // Two pad chars case 3: output += "="; break; // One pad char default: throw new System.Exception("Illegal base64url string!"); } var converted = Convert.FromBase64String(output); // Standard base64 decoder return converted; } }
And then my google specific JWT class:
public class GoogleJsonWebToken { public static string Encode(string email, string certificateFilePath) { 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; // Expiration time is up to 1 hour, but lets play on safe side var payload = new { iss = email, scope = "www.googleapis/auth/gan.readonly", aud = "accounts.google/o/oauth2/token", exp = exp, iat = iat }; var certificate = new X509Certificate2(certificateFilePath, "notasecret"); var privateKey = certificate.Export(X509ContentType.Cert); return JsonWebToken.Encode(payload, privateKey, JwtHashAlgorithm.RS256); } }
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C# 中是否有任何 JSON Web 令牌 (JWT) 示例?
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