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使用OWIN JWT承载认证验证RS256签名的JWT令牌

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我们有几个使用OWIN设置身份验证的.NET Framework 4.6.1 MVC应用程序 . 我们想要使用带有使用RS256签名的JWT令牌的UseJwtBearerAuthentication选项 .

我们还拥有验证JWT令牌所需的公钥 . 它由API调用检索,并作为JSON Web Key Set(JWKS)JSON字符串接收 .

来自https://auth0.com/docs/jwks的样品JWKS

{
"keys": [
{
"alg": "RS256",
"kty": "RSA",
"use": "sig",
"x5c": [
  "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"
],
"n": "yeNlzlub94YgerT030codqEztjfU_S6X4DbDA_iVKkjAWtYfPHDzz_sPCT1Axz6isZdf3lHpq_gYX4Sz-cbe4rjmigxUxr-FgKHQy3HeCdK6hNq9ASQvMK9LBOpXDNn7mei6RZWom4wo3CMvvsY1w8tjtfLb-yQwJPltHxShZq5-ihC9irpLI9xEBTgG12q5lGIFPhTl_7inA1PFK97LuSLnTJzW0bj096v_TMDg7pOWm_zHtF53qbVsI0e3v5nmdKXdFf9BjIARRfVrbxVxiZHjU6zL6jY5QJdh1QCmENoejj_ytspMmGW7yMRxzUqgxcAqOBpVm0b-_mW3HoBdjQ",
"e": "AQAB",
"kid": "NjVBRjY5MDlCMUIwNzU4RTA2QzZFMDQ4QzQ2MDAyQjVDNjk1RTM2Qg",
"x5t": "NjVBRjY5MDlCMUIwNzU4RTA2QzZFMDQ4QzQ2MDAyQjVDNjk1RTM2Qg"
}
]}

我想使用OWIN框架与UseJwtBearerAuthentication选项进行身份验证 . 我发现这个示例代码在startup.cs文件中应该有效,但我无法弄清楚如何将JWKS转换为新X509Certificate2对象的构造函数之一 .

app.UseJwtBearerAuthentication(
  new JwtBearerAuthenticationOptions
  {
    AuthenticationMode = AuthenticationMode.Active,
    AllowedAudiences = new[] { audience },
    IssuerSecurityTokenProviders = new IIssuerSecurityTokenProvider[]
    {
      new X509CertificateSecurityTokenProvider(issuer, new X509Certificate2("PATH_TO_YOUR_PUBLIC_CERTIFICATE.cer")),
    }
  });

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