/// <summary>
/// Add claims to the request context of the given request message
/// </summary>
/// <param name="wwwAuthenticateHeader">String representation of www Authenticate Header</param>
/// <param name="newRequest">Request message to add claims to</param>
private void AddClaimsToRequestContext(HttpRequestMessage newRequest, string wwwAuthenticateHeader)
{
int claimsStart = wwwAuthenticateHeader.IndexOf("claims=", StringComparison.OrdinalIgnoreCase);
if (claimsStart < 0)
{
return; // do nothing as there is no claims in www Authenticate Header
}
claimsStart += 8; // jump to the index after the opening quotation mark
// extract and decode the Base 64 encoded claims property
byte[] bytes = Convert.FromBase64String(wwwAuthenticateHeader.Substring(claimsStart, wwwAuthenticateHeader.Length - claimsStart - 1));
string claimsChallenge = Encoding.UTF8.GetString(bytes, 0, bytes.Length);
// Try to get the current options otherwise create new ones
AuthenticationHandlerOption authenticationHandlerOption = newRequest.GetMiddlewareOption <AuthenticationHandlerOption>() ?? AuthOption;
IAuthenticationProviderOption authenticationProviderOption = authenticationHandlerOption.AuthenticationProviderOption ?? new CaeAuthenticationProviderOption();
// make sure that there is no information loss due to casting by copying over the scopes information if necessary
CaeAuthenticationProviderOption caeAuthenticationProviderOption;
if (authenticationProviderOption is CaeAuthenticationProviderOption option)
{
caeAuthenticationProviderOption = option;
}
else
{
caeAuthenticationProviderOption = new CaeAuthenticationProviderOption(authenticationProviderOption);
}
// update the claims property in the options
caeAuthenticationProviderOption.Claims = claimsChallenge;
authenticationHandlerOption.AuthenticationProviderOption = caeAuthenticationProviderOption;
// update the request context with the updated options
GraphRequestContext requestContext = newRequest.GetRequestContext();
requestContext.MiddlewareOptions[typeof(AuthenticationHandlerOption).ToString()] = authenticationHandlerOption;
newRequest.Properties[typeof(GraphRequestContext).ToString()] = requestContext;
}
/// <summary>
/// Create instance of <see cref="CaeAuthenticationProviderOption"/> from an <see cref="IAuthenticationProviderOption"/> instance
/// </summary>
public CaeAuthenticationProviderOption(IAuthenticationProviderOption authenticationProviderOption)
{
this.Scopes = authenticationProviderOption?.Scopes;
}
