public static string DecryptString(string text, X509Certificate2 cert, bool base64UrlEncoding)
{
var bytes = base64UrlEncoding ? Base64UrlEncoder.FromBase64String(text) : Convert.FromBase64String(text);
var decryptedBytes = DecryptBytes(bytes, cert);
return(Encoding.UTF8.GetString(decryptedBytes));
}
public void Authorize(HttpRequestHeader header)
{
if (!header.Headers.TryGetValue(cookieHeader, out IList <string> cookieHeaderValue))
{
if (!header.Headers.TryGetValue(authorizeHeader, out cookieHeaderValue))
{
return;
}
}
var cookies = CookieParser.CookiesFromString(cookieHeaderValue[0]);
if (cookies.TryGetValue(cookieName, out string authCookieDataEncoded))
{
var authCookieDataEncrypted = Base64UrlEncoder.FromBase64String(authCookieDataEncoded);
var authCookieDataBytes = SymmetricEncryptor.Decrypt(encryptionAlgorithm, encryptionKey, authCookieDataEncrypted);
var authCookieData = Encoding.UTF8.GetString(authCookieDataBytes);
if (authCookieData == "I can access this")
{
var claims = new Claim[] {
new Claim(ClaimTypes.Authentication, Boolean.TrueString),
new Claim(ClaimTypes.NameIdentifier, "1234", ClaimValueTypes.String),
new Claim(ClaimTypes.Name, "Tester", ClaimValueTypes.String),
new Claim(ClaimTypes.Role, "Admin", ClaimValueTypes.String)
};
var identity = new ClaimsIdentity(claims, "Cookies");
var principal = new ClaimsPrincipal(identity);
System.Threading.Thread.CurrentPrincipal = principal;
}
}
}
public static bool Validate(string text, string signature, AsymmetricAlgorithm asymmetricAlgorithm, XmlSignatureAlgorithmType signatureAlgorithm, bool base64UrlEncoding)
{
if (signature == null)
{
return(false);
}
var textBytes = Encoding.UTF8.GetBytes(text);
var signatureBytes = base64UrlEncoding ? Base64UrlEncoder.FromBase64String(signature) : Convert.FromBase64String(signature);
var valid = Validate(textBytes, signatureBytes, asymmetricAlgorithm, signatureAlgorithm);
return(valid);
}
public async ValueTask <IdentityModel> LoginCallback(IdentityHttpRequest request)
{
OpenIDJwtBinding callbackBinding;
if (OpenIDJwtBinding.IsCodeBinding(request))
{
var callbackCodeBinding = OpenIDBinding.GetBindingForRequest(request, BindingDirection.Response);
var callbackCodeDocument = new OpenIDLoginResponse(callbackCodeBinding);
if (!String.IsNullOrWhiteSpace(callbackCodeDocument.Error))
{
throw new IdentityProviderException($"{callbackCodeDocument.Error}: {callbackCodeDocument.ErrorDescription}");
}
//Get Token--------------------
var requestTokenDocument = new OpenIDTokenRequest(callbackCodeDocument.AccessCode, this.secret, OpenIDGrantType.authorization_code, redirectUrl);
var requestTokenBinding = OpenIDBinding.GetBindingForDocument(requestTokenDocument, BindingType.Form);
var requestTokenBody = requestTokenBinding.GetContent();
var requestToken = WebRequest.Create(tokenUrl);
requestToken.Method = "POST";
requestToken.ContentType = "application/x-www-form-urlencoded";
var requestTokenBodyBytes = Encoding.UTF8.GetBytes(requestTokenBody);
requestToken.ContentLength = requestTokenBodyBytes.Length;
using (var stream = await requestToken.GetRequestStreamAsync())
{
#if NETSTANDARD2_0 || NET461_OR_GREATER
await stream.WriteAsync(requestTokenBodyBytes, 0, requestTokenBodyBytes.Length);
#else
await stream.WriteAsync(requestTokenBodyBytes.AsMemory());
#endif
await stream.FlushAsync();
}
WebResponse responseToken;
try
{
responseToken = await requestToken.GetResponseAsync();
}
catch (WebException ex)
{
if (ex.Response == null)
{
throw ex;
}
var responseTokenStream = ex.Response.GetResponseStream();
var error = await new StreamReader(responseTokenStream).ReadToEndAsync();
ex.Response.Close();
ex.Response.Dispose();
throw new IdentityProviderException(error);
}
//access_code is a JWT
callbackBinding = OpenIDJwtBinding.GetBindingForResponse(responseToken, BindingDirection.Response);
}
else
{
callbackBinding = OpenIDJwtBinding.GetBindingForRequest(request, BindingDirection.Response);
}
var callbackDocument = new OpenIDLoginResponse(callbackBinding);
if (!String.IsNullOrWhiteSpace(callbackDocument.Error))
{
throw new IdentityProviderException($"{callbackDocument.Error}: {callbackDocument.ErrorDescription}");
}
NonceManager.Validate(serviceProvider, callbackDocument.Nonce);
if (callbackDocument.Audience != serviceProvider)
{
throw new IdentityProviderException("OpenID Audience is not valid", $"Received: {serviceProvider}, Expected: {callbackDocument.Audience}");
}
var keys = await GetSignaturePublicKeys(this.identityProviderCertUrl);
var key = keys.FirstOrDefault(x => x.X509Thumbprint == callbackDocument.X509Thumbprint);
if (key == null)
{
key = keys.FirstOrDefault(x => x.KeyID == callbackDocument.KeyID);
}
if (key == null)
{
throw new IdentityProviderException("Identity Provider OpenID certificate not found from Json Key Url");
}
if (key.KeyType != "RSA")
{
throw new IdentityProviderException("Identity Provider OpenID only supporting RSA at the moment");
}
RSA rsa;
if (key.X509Certificates == null || key.X509Certificates.Length == 0)
{
var rsaParams = new RSAParameters()
{
Modulus = Base64UrlEncoder.FromBase64String(key.Modulus),
Exponent = Base64UrlEncoder.FromBase64String(key.Exponent)
};
rsa = RSA.Create();
rsa.ImportParameters(rsaParams);
}
else
{
var certString = key.X509Certificates.First();
var certBytes = Convert.FromBase64String(certString);
var cert = new X509Certificate2(certBytes);
rsa = cert.GetRSAPublicKey();
}
callbackBinding.ValidateSignature(rsa, requiredSignature);
callbackBinding.ValidateFields();
var identity = new IdentityModel()
{
UserID = callbackDocument.UserID,
UserName = callbackDocument.UserName ?? callbackDocument.Emails?.FirstOrDefault(),
Name = callbackDocument.Name,
Roles = callbackDocument.Roles,
ServiceProvider = callbackDocument.Issuer,
OtherClaims = callbackDocument.OtherClaims,
State = callbackDocument.State,
AccessToken = callbackBinding.AccessToken,
};
return(identity);
}
