/// <summary>
/// Validates the endoints and jwks_uri according to the security policy.
/// </summary>
/// <param name="json">The json.</param>
/// <param name="policy">The policy.</param>
/// <returns></returns>
public string ValidateEndpoints(JObject json, DiscoveryPolicy policy)
{
// allowed hosts
var allowedHosts = new HashSet <string>(policy.AdditionalEndpointBaseAddresses.Select(e => new Uri(e).Authority))
{
new Uri(policy.Authority).Authority
};
// allowed authorities (hosts + base address)
var allowedAuthorities = new HashSet <string>(policy.AdditionalEndpointBaseAddresses)
{
policy.Authority
};
foreach (var element in json)
{
if (element.Key.EndsWith("endpoint", StringComparison.OrdinalIgnoreCase) ||
element.Key.Equals(OidcConstants.Discovery.JwksUri, StringComparison.OrdinalIgnoreCase) ||
element.Key.Equals(OidcConstants.Discovery.CheckSessionIframe, StringComparison.OrdinalIgnoreCase))
{
var endpoint = element.Value.ToString();
var isValidUri = Uri.TryCreate(endpoint, UriKind.Absolute, out Uri uri);
if (!isValidUri)
{
return($"Malformed endpoint: {endpoint}");
}
if (!DiscoveryEndpoint.IsValidScheme(uri))
{
return($"Malformed endpoint: {endpoint}");
}
if (!DiscoveryEndpoint.IsSecureScheme(uri, policy))
{
return($"Endpoint does not use HTTPS: {endpoint}");
}
if (policy.ValidateEndpoints)
{
// if endpoint is on exclude list, don't validate
if (policy.EndpointValidationExcludeList.Contains(element.Key))
{
continue;
}
bool isAllowed = false;
foreach (var host in allowedHosts)
{
if (string.Equals(host, uri.Authority))
{
isAllowed = true;
}
}
if (!isAllowed)
{
return($"Endpoint is on a different host than authority: {endpoint}");
}
IAuthorityValidationStrategy strategy = policy.AuthorityValidationStrategy ?? DiscoveryPolicy.DefaultAuthorityValidationStrategy;
AuthorityValidationResult endpointValidationResult = strategy.IsEndpointValid(endpoint, allowedAuthorities);
if (!endpointValidationResult.Success)
{
return(endpointValidationResult.ErrorMessage);
}
}
}
}
if (policy.RequireKeySet)
{
if (string.IsNullOrWhiteSpace(JwksUri))
{
return("Keyset is missing");
}
}
return(string.Empty);
}
protected DiscoveryPolicyTestsBase(IAuthorityValidationStrategy authorityValidationStrategy)
{
_authorityValidationStrategy = authorityValidationStrategy;
}
/// <summary>
/// Checks if the issuer matches the authority.
/// </summary>
/// <param name="issuer">The issuer.</param>
/// <param name="authority">The authority.</param>
/// <param name="validationStrategy">The strategy to use.</param>
/// <returns></returns>
private bool ValidateIssuerName(string issuer, string authority, IAuthorityValidationStrategy validationStrategy)
{
return(validationStrategy.IsIssuerNameValid(issuer, authority).Success);
}
