验证 JWT 签名时出现 SecurityTokenSignatureKeyNotFoundException [英] SecurityTokenSignatureKeyNotFoundException when validating JWT signature

问题描述

我正在尝试为我的组织实施 OpenID Connect 规范.我在测试依赖方应用程序中使用 Microsoft 的 OpenID Connect OWIN 实现来验证我的协议实现.

I'm trying to implement the OpenID Connect specification for my organisation. I'm using Microsoft's OWIN implementation of OpenID Connect in a test relying party application to verify my implementation of the protocol.

我公开了以下元数据文档:

I've exposed the following metadata document:

{
  "issuer": "https://acs.contoso.com/",
  "authorization_endpoint": "http://localhost:53615/oauth2/auth",
  "token_endpoint": "http://localhost:53615/oauth2/token",
  "userinfo_endpoint": "http://localhost:53615/connect/userinfo",
  "jwks_uri": "http://localhost:53615/connect/keys",
  "ui_locales_supported": [
    "en-GB"
  ]
}

签名密钥公开为该文档:

The signing key is exposed as this document:

{
  "keys": [
    {
      "n": "xpXxl3M-YkZlzQJdArO1TfOGT2no-UL4dbZ7WuSCNIsSfyGDaqUXjMMHNyq9yD3vp-NCyk8kmn7d5XqHufnceXJM8q4xTrhN3lvywdBSbR-dwXsA-B-MJVgfiK0d_z-mxP9ew2Hj9-KkWbWCzsswlWp3gZ4mB4RGutB1IRSzXVIbvZ-MtKUb6XUDU4LDb_c1xCEXWZxhR-o1a1dLfObH2hHJ-w5y6odGlKtOFx4i4h0u7-Oj5R6k5b2YXEHM0IuYeN0u0sQvrTecokntGzPrvhnKy69I7Z_az5rC5kgloh25D9lTbe4vcRU7FXlYCFYDZsT0_IkGIXRi7brOS4f1ow",
      "e": "AQAB",
      "kty": "RSA",
      "use": "sig",
      "alg": "RS256",
      "kid": "F8A59280B3D13777CC7541B3218480984F421450"
    }
  ]
}

正在使用 JwtSecurityToken 类及其关联的处理程序，使用 X509SigningCredentials 类.这段代码代表了令牌是如何构造的，并作为响应数据的参数返回给调用系统.

The identity token is being generated using the JwtSecurityToken class and its associated handler, using the X509SigningCredentials class. This code is representative of how the token is constructed and returned to the calling system as a parameter of the response data.

var credentials = new X509SigningCredentials(cert); // My certificate.
var issuedTime = DateTime.UtcNow;
var expiresTime = issuedTime.AddMinutes(5);
var epoch = new DateTime(1970, 01, 01, 0, 0, 0);

var claims = new[]
{
    new Claim("sub", Guid.NewGuid().ToString()),
    new Claim("iat" Math.Floor((issuedTime - epoch).TotalSeconds).ToString()),
    new Claim("nonce", nonce), // Value from client
}

var token = new JwtSecurityToken(
    "https://acs.contoso.com",
    client_id, // Value from client
    claims,
    new Lifetime(issuedTime, expiresTime),
    credentials);

var handler = new JwtSecurityTokenHandler();
parameters.Add("id_token", handler.WriteToken(token)); // Outgoing parameters.

当我尝试将签名的令牌传递回依赖方应用程序时，OWIN 中间件接受 POST 并尝试验证令牌的签名.这样做会引发以下异常:

When I attempt to pass the signed token back to the relying party application, the OWIN middleware accepts the POST and attempts to verify the signature of the token. In doing so, the following exception is thrown:

SecurityTokenSignatureKeyNotFoundException: IDX10500: 签名验证失败.无法解析 SecurityKeyIdentifier:'SecurityKeyIdentifier (IsReadOnly = False, Count = 1, Clause[0] =X509ThumbprintKeyIdentifierClause(哈希 =0xF8A59280B3D13777CC7541B3218480984F421450) ) '，令牌:'{"typ":"JWT","alg":"RS256","x5t":"-KWSgLPRN3fMdUGzIYSAmE9CFFA"}.{"iss":"https://test.accesscontrol.net/","aud":"test","nbf":1404917162,"exp":1404917462,"sub":"60eb55ec-0699-4068-bfa6-41666fc2b2e9","iat":"1404917162"}原始数据:eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsIng1dCI6Ii1LV1NnTFBSTjNmTWRVR3pJWVNBbUU5Q0ZGQSJ9.eyJpc3MiOiJodHRwczovL2Fjcy5zdXJlY2xvdWQuY29tLyIsImF1ZCI6InRlc3QiLCJuYmYiOjE0MDQ5MTcxNjIsImV4cCI6MTQwNDkxNzQ2Miwic3ViIjoiNjBlYjU1ZWMtMDY5OS00MDY4LWJmYTYtNDE2NjZmYzJiMmU5IiwiaWF0IjoiMTQwNDkxNzE2MiJ9.xkP0RwlX3CYfU0KhFsVvLJC94WK22DTqNTm71cfjiJ8VUHv3b2YhDqfq70N8mQEyiR8vTR6OQqnO6UqXqX4RXUs6ZkfK9Liv3n9NhCs97wJhP2jfefJYeScYtRmWcNNWSSL7vkm2JXQfwKOQTnOGp-ba04TtI6jVrjhOQXH43eCJ9vNuBUzdD-t8CAdmnbvH0nWpIB8kWbw5v8Sa0aQuxMjJYbLC_2Iw3X13dqnyVjp4fA7eSB8N7c1it0KEB-VKfUqiGD3VecyEZGGZbaGE8rvVet5QrY1lJ3V4yM8j6-xDc5Yndc4swOun0L3D6TYk-8gdVXUJDRjbv1ZuhZltsw".

SecurityTokenSignatureKeyNotFoundException: IDX10500: Signature validation failed. Unable to resolve SecurityKeyIdentifier: 'SecurityKeyIdentifier ( IsReadOnly = False, Count = 1, Clause[0] = X509ThumbprintKeyIdentifierClause(Hash = 0xF8A59280B3D13777CC7541B3218480984F421450) ) ', token: '{"typ":"JWT","alg":"RS256","x5t":"-KWSgLPRN3fMdUGzIYSAmE9CFFA"}.{"iss":"https://test.accesscontrol.net/","aud":"test","nbf":1404917162,"exp":1404917462,"sub":"60eb55ec-0699-4068-bfa6-41666fc2b2e9","iat":"1404917162"} RawData: eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsIng1dCI6Ii1LV1NnTFBSTjNmTWRVR3pJWVNBbUU5Q0ZGQSJ9.eyJpc3MiOiJodHRwczovL2Fjcy5zdXJlY2xvdWQuY29tLyIsImF1ZCI6InRlc3QiLCJuYmYiOjE0MDQ5MTcxNjIsImV4cCI6MTQwNDkxNzQ2Miwic3ViIjoiNjBlYjU1ZWMtMDY5OS00MDY4LWJmYTYtNDE2NjZmYzJiMmU5IiwiaWF0IjoiMTQwNDkxNzE2MiJ9.xkP0RwlX3CYfU0KhFsVvLJC94WK22DTqNTm71cfjiJ8VUHv3b2YhDqfq70N8mQEyiR8vTR6OQqnO6UqXqX4RXUs6ZkfK9Liv3n9NhCs97wJhP2jfefJYeScYtRmWcNNWSSL7vkm2JXQfwKOQTnOGp-ba04TtI6jVrjhOQXH43eCJ9vNuBUzdD-t8CAdmnbvH0nWpIB8kWbw5v8Sa0aQuxMjJYbLC_2Iw3X13dqnyVjp4fA7eSB8N7c1it0KEB-VKfUqiGD3VecyEZGGZbaGE8rvVet5QrY1lJ3V4yM8j6-xDc5Yndc4swOun0L3D6TYk-8gdVXUJDRjbv1ZuhZltsw'.

该组件仍处于预发布状态，因此这可能是实现中的一个缺陷，但我想在排除所有可能性之前假设这是我的错误.

The component is still pre-release, so this may be a flaw in the implementation, however I want to assume it's my error until all possibilities have been ruled out.

我在做什么显然是错误的，或者我应该做些什么来准确了解签名无法验证的原因?

Is there anything I'm doing which is obviously wrong, or is there something I should do to understand exactly why the signature is failing to be validated?

推荐答案

问题出在此处的异常信息中:

The problem is nestled in the exception message here:

Clause[0] = X509ThumbprintKeyIdentifierClause(Hash = 0xF8A59280B3D13777CC7541B3218480984F421450)

Clause[0] = X509ThumbprintKeyIdentifierClause(Hash = 0xF8A59280B3D13777CC7541B3218480984F421450)

令牌使用 X.509 证书的默认密钥标识符子句进行签名:其指纹.元数据仅公开 RSA 参数和名称标识符.当客户端检索元数据时，它使用此信息设置 RSA 密钥，而不是 X.509 指纹.

The token is signed with the default key identifier clause for an X.509 certificate: its thumbprint. The metadata is exposing just the RSA parameters and a name identifier. When the client retrieves the metadata, it sets up an RSA key using this information, not an X.509 thumbprint.

要更正此错误，必须更改签名凭据以包含正确的名称标识符:

To correct this error, the signing credentials have to be changed to include the correct name identifier:

var credentials = new X509CertificateCredentials(
    cert,
    new SecurityKeyIdentifier(
        new NamedKeySecurityKeyIdentifierClause(
            "kid",
            "F8A59280B3D13777CC7541B3218480984F421450")));

这在签名中包含了预期的标识符，并且签名验证成功.

This includes the expected identifier in the signature, and the signature is validated successfully.

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