/// <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>
/// Construct a new <see cref="AuthenticationHandler"/>
/// </summary>
/// <param name="authenticationProvider">An authentication provider to pass to <see cref="AuthenticationHandler"/> for authenticating requests.</param>
/// <param name="innerHandler">A HTTP message handler to pass to the <see cref="AuthenticationHandler"/> for sending requests.</param>
/// <param name="authOption">An OPTIONAL <see cref="Microsoft.Graph.AuthenticationHandlerOption"/> to configure <see cref="AuthenticationHandler"/></param>
public AuthenticationHandler(IAuthenticationProvider authenticationProvider, HttpMessageHandler innerHandler, AuthenticationHandlerOption authOption = null)
: this(authenticationProvider, authOption)
{
InnerHandler = innerHandler;
AuthenticationProvider = authenticationProvider;
}
/// <summary>
/// Construct a new <see cref="AuthenticationHandler"/>
/// <param name="authenticationProvider">An authentication provider to pass to <see cref="AuthenticationHandler"/> for authenticating requests.</param>
/// </summary>
/// <param name="authOption">An OPTIONAL <see cref="Microsoft.Graph.AuthenticationHandlerOption"/> to configure <see cref="AuthenticationHandler"/></param>
public AuthenticationHandler(IAuthenticationProvider authenticationProvider, AuthenticationHandlerOption authOption = null)
{
AuthenticationProvider = authenticationProvider;
AuthOption = authOption ?? new AuthenticationHandlerOption();
}