[英]Validate JWT (ES256) Token with ---PUBLIC KEY--- in c#
我有一個由我的 AWS ALB 使用 OpenID 連接器創建的 JWT。 我需要在我的 c# 應用程序中驗證令牌。 但我很難讓它發揮作用。
AWS 在此處描述了令牌驗證: https : //docs.aws.amazon.com/elasticloadbalancing/latest/application/listener-authenticate-users.html?icmpid=docs_elbv2_console
它應該分 3 個步驟工作:
(https://public-keys.auth.elb.' + region + '.amazonaws.com/' + key id)
這是我得到的 JWT:
eyJ0eXAiOiJKV1QiLCJraWQiOiJjODE4ZTcxNi01OTAxLTQzOWQtOWFlZC1lYmRmODAyYjZkYTkiLCJhbGciOiJFUzI1NiIsImlzcyI6Imh0dHBzOi8vc2llbWVucy1xYS0wMDA2OS5ldS5hdXRoMC5jb20vIiwiY2xpZW50IjoiMndsS3k0YlRXbGpZWm9KYXZRSVFqVTE3OUprVG4zNDAiLCJzaWduZXIiOiJhcm46YXdzOmVsYXN0aWNsb2FkYmFsYW5jaW5nOmV1LWNlbnRyYWwtMTo0ODU2ODM0ODcxOTY6bG9hZGJhbGFuY2VyL2FwcC9maW5kLXRlc3QtYWxiLzU3YzBmMWYzZjg0YzZjMjEiLCJleHAiOjE1NzU1NDMwMzN9.eyJzdWIiOiJvYXV0aDJ8bWFpbi10ZW5hbnQtb2lkY3xzYW1scHxTaWVtZW5zfFowMDJFSk5VIiwiZ2l2ZW5fbmFtZSI6IlJhcGhhZWwiLCJmYW1pbHlfbmFtZSI6IlNjaG5haXRsIiwibmlja25hbWUiOiJSYXBoYWVsIiwibmFtZSI6IlJhcGhhZWwgU2NobmFpdGwiLCJwaWN0dXJlIjoiaHR0cHM6Ly9zLmdyYXZhdGFyLmNvbS9hdmF0YXIvODkzNWVlY2QzMDc2ZTAyMTQ5ODE2MTZmZjBkZTRkZjI_cz00ODAmcj1wZyZkPWh0dHBzJTNBJTJGJTJGY2RuLmF1dGgwLmNvbSUyRmF2YXRhcnMlMkZyYS5wbmciLCJ1cGRhdGVkX2F0IjoiMjAxOS0xMi0wNVQxMDo0ODozMy4wNjhaIiwiZXhwIjoxNTc1NTQzMDMzLCJpc3MiOiJodHRwczovL3NpZW1lbnMtcWEtMDAwNjkuZXUuYXV0aDAuY29tLyJ9.M39aPefXmaDGzaDd0qHcQHMhvugTVN4i4pyvGJ-7fayewU9vZdtKvSzFF9rVal8GEz7HKTr_auqMw9HemOWyag ==
因此,密鑰 ID 是: c818e716-5901-439d-9aed-ebdf802b6da9
公鑰:
-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAENARdEGaEpfgHph3440UodVsQdqxi
PYz+l1aEcz+Bivr6emXDnor1nET94dbPqYxk+vtUHGkgOb44VPEZUe4ijQ==
-----END PUBLIC KEY-----
我嘗試使用以下方法驗證代碼:
System.IdentityModel.Tokens.Jwt
命名空間。 但是我無法將公鑰作為字符串提供給 ValidationParameters。 我遵循了這個答案https://stackoverflow.com/a/51866939/2250672的類似方法。 感覺很復雜,容易出錯。 由於一整天后我無法讓它工作,我決定繼續使用提供相同功能的 nuget 軟件包之一。 Jose.JWT.Decode(__token, publicKeyPem, Jose.JwsAlgorithm.ES256)
收到以下錯誤:
錯誤:腳本執行失敗。 [ArgumentException] EcdsaUsingSha 算法要求密鑰為 CngKey 或 ECDsa 類型。
如何在 C# 中簡單地從 AWS ALB 驗證 JWT?
公鑰在https://siemens-qa-00069.eu.auth0.com/.well-known/openid-configuration上不可用。 因此,您可以嘗試手動方法:
private static ECDsa LoadPublicKey(byte[] key)
{
byte[] pubKeyX = key.Skip(27).Take(32).ToArray();
byte[] pubKeyY = key.Skip(59).Take(32).ToArray();
return ECDsa.Create(new ECParameters
{
Curve = ECCurve.NamedCurves.nistP256,
Q = new ECPoint
{
X = pubKeyX,
Y = pubKeyY
}
});
}
string key = "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAENARdEGaEpfgHph3440UodVsQdqxiPYz+l1aEcz+Bivr6emXDnor1nET94dbPqYxk+vtUHGkgOb44VPEZUe4ijQ==";
ECDsa ecdsa = LoadPublicKey(Convert.FromBase64String(key));
string authorizationDomain = "https://siemens-qa-00069.eu.auth0.com/";
string jwt = "eyJ0eXAiOiJKV1QiLCJraWQiOiJjODE4ZTcxNi01OTAxLTQzOWQtOWFlZC1lYmRmODAyYjZkYTkiLCJhbGciOiJFUzI1NiIsImlzcyI6Imh0dHBzOi8vc2llbWVucy1xYS0wMDA2OS5ldS5hdXRoMC5jb20vIiwiY2xpZW50IjoiMndsS3k0YlRXbGpZWm9KYXZRSVFqVTE3OUprVG4zNDAiLCJzaWduZXIiOiJhcm46YXdzOmVsYXN0aWNsb2FkYmFsYW5jaW5nOmV1LWNlbnRyYWwtMTo0ODU2ODM0ODcxOTY6bG9hZGJhbGFuY2VyL2FwcC9maW5kLXRlc3QtYWxiLzU3YzBmMWYzZjg0YzZjMjEiLCJleHAiOjE1NzU1NDMwMzN9.eyJzdWIiOiJvYXV0aDJ8bWFpbi10ZW5hbnQtb2lkY3xzYW1scHxTaWVtZW5zfFowMDJFSk5VIiwiZ2l2ZW5fbmFtZSI6IlJhcGhhZWwiLCJmYW1pbHlfbmFtZSI6IlNjaG5haXRsIiwibmlja25hbWUiOiJSYXBoYWVsIiwibmFtZSI6IlJhcGhhZWwgU2NobmFpdGwiLCJwaWN0dXJlIjoiaHR0cHM6Ly9zLmdyYXZhdGFyLmNvbS9hdmF0YXIvODkzNWVlY2QzMDc2ZTAyMTQ5ODE2MTZmZjBkZTRkZjI_cz00ODAmcj1wZyZkPWh0dHBzJTNBJTJGJTJGY2RuLmF1dGgwLmNvbSUyRmF2YXRhcnMlMkZyYS5wbmciLCJ1cGRhdGVkX2F0IjoiMjAxOS0xMi0wNVQxMDo0ODozMy4wNjhaIiwiZXhwIjoxNTc1NTQzMDMzLCJpc3MiOiJodHRwczovL3NpZW1lbnMtcWEtMDAwNjkuZXUuYXV0aDAuY29tLyJ9.M39aPefXmaDGzaDd0qHcQHMhvugTVN4i4pyvGJ-7fayewU9vZdtKvSzFF9rVal8GEz7HKTr_auqMw9HemOWyag==";
TokenValidationParameters tokenValidationParameters = new TokenValidationParameters
{
ValidIssuer = authorizationDomain,
ValidateAudience = false,
IssuerSigningKey = new ECDsaSecurityKey(ecdsa)
};
try
{
JwtSecurityTokenHandler jwtSecurityTokenHandler = new JwtSecurityTokenHandler();
jwtSecurityTokenHandler.ValidateToken(jwt, tokenValidationParameters, out _);
return true;
}
catch (SecurityTokenException)
{
return false;
}
問題是我無法測試它,因為在我的機器上(Windows 10 + .NET Core 2.1)我收到這個錯誤:
System.PlatformNotSupportedException: 指定的曲線“nistP256”或其參數對於此平台無效。 ---> Internal.Cryptography.CryptoThrowHelper+WindowsCryptographicException:參數不正確
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