private async Task<AccessTokenIntrospectionResult> IntrospectTokenOnlineAsync(string accessToken,
AccessTokenType accessTokenType, DiscoveryDocumentShortInfo discoveryDocument)
{
// TODO: This approach should be reconsidered in future.
/*
The solution below allows use "Orleans.Security" with IdentityServer4 v2.x and IdentityServer4 v3.x.
At the same time, DLR with Reflection in is a bad idea.
*/
const string fullyQualifiedNameOfType =
"IdentityModel.Client.HttpClientTokenIntrospectionExtensions, IdentityModel";
dynamic request =
Activator.CreateInstance(Type.GetType("IdentityModel.Client.TokenIntrospectionRequest, IdentityModel",
true));
request.Address = discoveryDocument.IntrospectionEndpoint;
request.ClientId = _identityServer4Info.ClientId;
request.Token = accessToken;
request.ClientSecret = _identityServer4Info.ClientSecret;
var cancellationToken = default(CancellationToken);
var param = new object[] { _httpClient,request, cancellationToken };
var introspectionResponse =
await RuntimeMethodBinder.InvokeAsync(fullyQualifiedNameOfType,
"IntrospectTokenAsync", param, 3);
// TODO: This should be used normally.
/*
var request = new TokenIntrospectionRequest
{
Address = discoveryDocument.IntrospectionEndpoint,
ClientId = _identityServer4Info.ClientId,
Token = accessToken,
ClientSecret = _identityServer4Info.ClientSecret,
};
var introspectionResponse = await _httpClient.IntrospectTokenAsync(request);
*/
var nameOfTokenType = accessTokenType == AccessTokenType.Jwt ? "JWT" : "Reference";
// ReSharper disable once ConvertIfStatementToReturnStatement
if (!introspectionResponse.IsError)
{
return new AccessTokenIntrospectionResult(accessTokenType, introspectionResponse.Claims,
introspectionResponse.IsActive);
}
_logger.LogTrace(LoggingEvents.AccessTokenValidationFailed,
$"{LoggingEvents.AccessTokenValidationFailed.Name} Token type: {nameOfTokenType} " +
$"Reason: {introspectionResponse.Error} " +
$"Token value: {accessToken}");
return new AccessTokenIntrospectionResult(accessTokenType, introspectionResponse.Claims, false);
}
internal static IEnumerable <Claim> Verify(string jwt, string audience,
DiscoveryDocumentShortInfo discoveryDocument)
{
var keys = new List <SecurityKey>();
foreach (var webKey in discoveryDocument.Keys)
{
var e = Base64Url.Decode(webKey.E);
var n = Base64Url.Decode(webKey.N);
var key = new RsaSecurityKey(new RSAParameters {
Exponent = e, Modulus = n
})
{
KeyId = webKey.Kid
};
keys.Add(key);
}
var parameters = new TokenValidationParameters
{
ValidIssuer = discoveryDocument.Issuer,
ValidAudience = audience,
IssuerSigningKeys = keys,
NameClaimType = JwtClaimTypes.Name,
RoleClaimType = JwtClaimTypes.Role,
RequireSignedTokens = true
};
var handler = new JwtSecurityTokenHandler();
handler.InboundClaimTypeMap.Clear();
var claimsPrincipal = handler.ValidateToken(jwt, parameters, out var validatedToken);
return(claimsPrincipal.Claims);
}