public async Task<IEndpointResult> ProcessAsync(HttpContext context)
{
_logger.LogTrace("Processing discovery request.");
// validate HTTP
if (!HttpMethods.IsGet(context.Request.Method))
{
_logger.LogWarning("Discovery endpoint only supports GET requests");
return new StatusCodeResult(HttpStatusCode.MethodNotAllowed);
}
_logger.LogDebug("Start discovery request");
if (!_options.Endpoints.EnableDiscoveryEndpoint)
{
_logger.LogInformation("Discovery endpoint disabled. 404.");
return new StatusCodeResult(HttpStatusCode.NotFound);
}
var baseUrl = context.GetIdentityServerBaseUrl().EnsureTrailingSlash();
var issuerUri = context.GetIdentityServerIssuerUri();
// generate response
_logger.LogTrace("Calling into discovery response generator: {type}", _responseGenerator.GetType().FullName);
var response = await _responseGenerator.CreateDiscoveryDocumentAsync(baseUrl, issuerUri);
return new DiscoveryDocumentResult(response, _options.Discovery.ResponseCacheInterval);
}
/// <summary>
/// Creates the discovery document.
/// </summary>
/// <param name="baseUrl">The base URL.</param>
/// <param name="issuerUri">The issuer URI.</param>
public virtual async Task<Dictionary<string, object>> CreateDiscoveryDocumentAsync(string baseUrl, string issuerUri)
{
var entries = new Dictionary<string, object>
{
{ OidcConstants.Discovery.Issuer, issuerUri }
};
// jwks
if (Options.Discovery.ShowKeySet)
{
if ((await Keys.GetValidationKeysAsync()).Any())
{
entries.Add(OidcConstants.Discovery.JwksUri, baseUrl + Constants.ProtocolRoutePaths.DiscoveryWebKeys);
}
}
// endpoints
if (Options.Discovery.ShowEndpoints)
{
if (Options.Endpoints.EnableAuthorizeEndpoint)
{
entries.Add(OidcConstants.Discovery.AuthorizationEndpoint, baseUrl + Constants.ProtocolRoutePaths.Authorize);
}
if (Options.Endpoints.EnableTokenEndpoint)
{
entries.Add(OidcConstants.Discovery.TokenEndpoint, baseUrl + Constants.ProtocolRoutePaths.Token);
}
if (Options.Endpoints.EnableUserInfoEndpoint)
{
entries.Add(OidcConstants.Discovery.UserInfoEndpoint, baseUrl + Constants.ProtocolRoutePaths.UserInfo);
}
if (Options.Endpoints.EnableEndSessionEndpoint)
{
entries.Add(OidcConstants.Discovery.EndSessionEndpoint, baseUrl + Constants.ProtocolRoutePaths.EndSession);
}
if (Options.Endpoints.EnableCheckSessionEndpoint)
{
entries.Add(OidcConstants.Discovery.CheckSessionIframe, baseUrl + Constants.ProtocolRoutePaths.CheckSession);
}
if (Options.Endpoints.EnableTokenRevocationEndpoint)
{
entries.Add(OidcConstants.Discovery.RevocationEndpoint, baseUrl + Constants.ProtocolRoutePaths.Revocation);
}
if (Options.Endpoints.EnableIntrospectionEndpoint)
{
entries.Add(OidcConstants.Discovery.IntrospectionEndpoint, baseUrl + Constants.ProtocolRoutePaths.Introspection);
}
if (Options.Endpoints.EnableDeviceAuthorizationEndpoint)
{
entries.Add(OidcConstants.Discovery.DeviceAuthorizationEndpoint, baseUrl + Constants.ProtocolRoutePaths.DeviceAuthorization);
}
if (Options.MutualTls.Enabled)
{
var mtlsEndpoints = new Dictionary<string, string>();
if (Options.Endpoints.EnableTokenEndpoint)
{
mtlsEndpoints.Add(OidcConstants.Discovery.TokenEndpoint, baseUrl + Constants.ProtocolRoutePaths.MtlsToken);
}
if (Options.Endpoints.EnableTokenRevocationEndpoint)
{
mtlsEndpoints.Add(OidcConstants.Discovery.RevocationEndpoint, baseUrl + Constants.ProtocolRoutePaths.MtlsRevocation);
}
if (Options.Endpoints.EnableIntrospectionEndpoint)
{
mtlsEndpoints.Add(OidcConstants.Discovery.IntrospectionEndpoint, baseUrl + Constants.ProtocolRoutePaths.MtlsIntrospection);
}
if (Options.Endpoints.EnableDeviceAuthorizationEndpoint)
{
mtlsEndpoints.Add(OidcConstants.Discovery.DeviceAuthorizationEndpoint, baseUrl + Constants.ProtocolRoutePaths.MtlsDeviceAuthorization);
}
if (mtlsEndpoints.Any())
{
entries.Add(OidcConstants.Discovery.MtlsEndpointAliases, mtlsEndpoints);
}
}
}
// logout
if (Options.Endpoints.EnableEndSessionEndpoint)
{
entries.Add(OidcConstants.Discovery.FrontChannelLogoutSupported, true);
entries.Add(OidcConstants.Discovery.FrontChannelLogoutSessionSupported, true);
entries.Add(OidcConstants.Discovery.BackChannelLogoutSupported, true);
entries.Add(OidcConstants.Discovery.BackChannelLogoutSessionSupported, true);
}
// scopes and claims
if (Options.Discovery.ShowIdentityScopes ||
Options.Discovery.ShowApiScopes ||
Options.Discovery.ShowClaims)
{
var resources = await ResourceStore.GetAllEnabledResourcesAsync();
var scopes = new List<string>();
// scopes
if (Options.Discovery.ShowIdentityScopes)
{
scopes.AddRange(resources.IdentityResources.Where(x => x.ShowInDiscoveryDocument).Select(x => x.Name));
}
if (Options.Discovery.ShowApiScopes)
{
var apiScopes = from api in resources.ApiResources
from scope in api.Scopes
where scope.ShowInDiscoveryDocument
select scope.Name;
scopes.AddRange(apiScopes);
scopes.Add(IdentityServerConstants.StandardScopes.OfflineAccess);
}
if (scopes.Any())
{
entries.Add(OidcConstants.Discovery.ScopesSupported, scopes.ToArray());
}
// claims
if (Options.Discovery.ShowClaims)
{
var claims = new List<string>();
// add non-hidden identity scopes related claims
claims.AddRange(resources.IdentityResources.Where(x => x.ShowInDiscoveryDocument).SelectMany(x => x.UserClaims));
// add non-hidden api scopes related claims
foreach (var resource in resources.ApiResources)
{
claims.AddRange(resource.UserClaims);
foreach (var scope in resource.Scopes)
{
if (scope.ShowInDiscoveryDocument)
{
claims.AddRange(scope.UserClaims);
}
}
}
entries.Add(OidcConstants.Discovery.ClaimsSupported, claims.Distinct().ToArray());
}
}
// grant types
if (Options.Discovery.ShowGrantTypes)
{
var standardGrantTypes = new List<string>
{
OidcConstants.GrantTypes.AuthorizationCode,
OidcConstants.GrantTypes.ClientCredentials,
OidcConstants.GrantTypes.RefreshToken,
OidcConstants.GrantTypes.Implicit
};
if (!(ResourceOwnerValidator is NotSupportedResourceOwnerPasswordValidator))
{
standardGrantTypes.Add(OidcConstants.GrantTypes.Password);
}
if (Options.Endpoints.EnableDeviceAuthorizationEndpoint)
{
standardGrantTypes.Add(OidcConstants.GrantTypes.DeviceCode);
}
var showGrantTypes = new List<string>(standardGrantTypes);
if (Options.Discovery.ShowExtensionGrantTypes)
{
showGrantTypes.AddRange(ExtensionGrants.GetAvailableGrantTypes());
}
entries.Add(OidcConstants.Discovery.GrantTypesSupported, showGrantTypes.ToArray());
}
// response types
if (Options.Discovery.ShowResponseTypes)
{
entries.Add(OidcConstants.Discovery.ResponseTypesSupported, Constants.SupportedResponseTypes.ToArray());
}
// response modes
if (Options.Discovery.ShowResponseModes)
{
entries.Add(OidcConstants.Discovery.ResponseModesSupported, Constants.SupportedResponseModes.ToArray());
}
// misc
if (Options.Discovery.ShowTokenEndpointAuthenticationMethods)
{
var types = SecretParsers.GetAvailableAuthenticationMethods().ToList();
if (Options.MutualTls.Enabled)
{
types.Add(OidcConstants.EndpointAuthenticationMethods.TlsClientAuth);
types.Add(OidcConstants.EndpointAuthenticationMethods.SelfSignedTlsClientAuth);
}
entries.Add(OidcConstants.Discovery.TokenEndpointAuthenticationMethodsSupported, types);
}
var signingCredentials = await Keys.GetSigningCredentialsAsync();
if (signingCredentials != null)
{
var algorithm = signingCredentials.Algorithm;
entries.Add(OidcConstants.Discovery.IdTokenSigningAlgorithmsSupported, new[] { algorithm });
}
entries.Add(OidcConstants.Discovery.SubjectTypesSupported, new[] { "public" });
entries.Add(OidcConstants.Discovery.CodeChallengeMethodsSupported, new[] { OidcConstants.CodeChallengeMethods.Plain, OidcConstants.CodeChallengeMethods.Sha256 });
if (Options.Endpoints.EnableAuthorizeEndpoint)
{
entries.Add(OidcConstants.Discovery.RequestParameterSupported, true);
if (Options.Endpoints.EnableJwtRequestUri)
{
entries.Add(OidcConstants.Discovery.RequestUriParameterSupported, true);
}
}
if (Options.MutualTls.Enabled)
{
entries.Add(OidcConstants.Discovery.TlsClientCertificateBoundAccessTokens, true);
}
// custom entries
if (!Options.Discovery.CustomEntries.IsNullOrEmpty())
{
foreach (var customEntry in Options.Discovery.CustomEntries)
{
if (entries.ContainsKey(customEntry.Key))
{
Logger.LogError("Discovery custom entry {key} cannot be added, because it already exists.", customEntry.Key);
}
else
{
if (customEntry.Value is string customValueString)
{
if (customValueString.StartsWith("~/") && Options.Discovery.ExpandRelativePathsInCustomEntries)
{
entries.Add(customEntry.Key, baseUrl + customValueString.Substring(2));
continue;
}
}
entries.Add(customEntry.Key, customEntry.Value);
}
}
}
return entries;
}
然后是jwks描述信息的代码。关于加密的信息也是根据配置的SecuritKey去动态返回的。
public virtual async Task<IEnumerable<Models.JsonWebKey>> CreateJwkDocumentAsync()
{
var webKeys = new List<Models.JsonWebKey>();
foreach (var key in await Keys.GetValidationKeysAsync())
{
if (key.Key is X509SecurityKey x509Key)
{
var cert64 = Convert.ToBase64String(x509Key.Certificate.RawData);
var thumbprint = Base64Url.Encode(x509Key.Certificate.GetCertHash());
if (x509Key.PublicKey is RSA rsa)
{
var parameters = rsa.ExportParameters(false);
var exponent = Base64Url.Encode(parameters.Exponent);
var modulus = Base64Url.Encode(parameters.Modulus);
var rsaJsonWebKey = new Models.JsonWebKey
{
kty = "RSA",
use = "sig",
kid = x509Key.KeyId,
x5t = thumbprint,
e = exponent,
n = modulus,
x5c = new[] { cert64 },
alg = key.SigningAlgorithm
};
webKeys.Add(rsaJsonWebKey);
}
else if (x509Key.PublicKey is ECDsa ecdsa)
{
var parameters = ecdsa.ExportParameters(false);
var x = Base64Url.Encode(parameters.Q.X);
var y = Base64Url.Encode(parameters.Q.Y);
var ecdsaJsonWebKey = new Models.JsonWebKey
{
kty = "EC",
use = "sig",
kid = x509Key.KeyId,
x5t = thumbprint,
x = x,
y = y,
crv = CryptoHelper.GetCrvValueFromCurve(parameters.Curve),
x5c = new[] { cert64 },
alg = key.SigningAlgorithm
};
webKeys.Add(ecdsaJsonWebKey);
}
else
{
throw new InvalidOperationException($"key type: {x509Key.PublicKey.GetType().Name} not supported.");
}
}
else if (key.Key is RsaSecurityKey rsaKey)
{
var parameters = rsaKey.Rsa?.ExportParameters(false) ?? rsaKey.Parameters;
var exponent = Base64Url.Encode(parameters.Exponent);
var modulus = Base64Url.Encode(parameters.Modulus);
var webKey = new Models.JsonWebKey
{
kty = "RSA",
use = "sig",
kid = rsaKey.KeyId,
e = exponent,
n = modulus,
alg = key.SigningAlgorithm
};
webKeys.Add(webKey);
}
else if (key.Key is ECDsaSecurityKey ecdsaKey)
{
var parameters = ecdsaKey.ECDsa.ExportParameters(false);
var x = Base64Url.Encode(parameters.Q.X);
var y = Base64Url.Encode(parameters.Q.Y);
var ecdsaJsonWebKey = new Models.JsonWebKey
{
kty = "EC",
use = "sig",
kid = ecdsaKey.KeyId,
x = x,
y = y,
crv = CryptoHelper.GetCrvValueFromCurve(parameters.Curve),
alg = key.SigningAlgorithm
};
webKeys.Add(ecdsaJsonWebKey);
}
else if (key.Key is JsonWebKey jsonWebKey)
{
var webKey = new Models.JsonWebKey
{
kty = jsonWebKey.Kty,
use = jsonWebKey.Use ?? "sig",
kid = jsonWebKey.Kid,
x5t = jsonWebKey.X5t,
e = jsonWebKey.E,
n = jsonWebKey.N,
x5c = jsonWebKey.X5c?.Count == 0 ? null : jsonWebKey.X5c.ToArray(),
alg = jsonWebKey.Alg,
x = jsonWebKey.X,
y = jsonWebKey.Y
};
webKeys.Add(webKey);
}
}
return webKeys;
}
本文作者：HoldenGong