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ClientSecretBasicAuthenticationConverter.java
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ClientSecretBasicAuthenticationConverter.java
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/*
* Copyright 2020-2022 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.security.oauth2.server.authorization.web.authentication;
import java.net.URLDecoder;
import java.nio.charset.StandardCharsets;
import java.util.Base64;
import jakarta.servlet.http.HttpServletRequest;
import org.springframework.http.HttpHeaders;
import org.springframework.lang.Nullable;
import org.springframework.security.core.Authentication;
import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
import org.springframework.security.oauth2.core.OAuth2AuthenticationException;
import org.springframework.security.oauth2.core.OAuth2Error;
import org.springframework.security.oauth2.core.OAuth2ErrorCodes;
import org.springframework.security.oauth2.server.authorization.authentication.OAuth2ClientAuthenticationToken;
import org.springframework.security.oauth2.server.authorization.web.OAuth2ClientAuthenticationFilter;
import org.springframework.security.web.authentication.AuthenticationConverter;
import org.springframework.util.StringUtils;
/**
* Attempts to extract HTTP Basic credentials from {@link HttpServletRequest}
* and then converts to an {@link OAuth2ClientAuthenticationToken} used for authenticating the client.
*
* @author Patryk Kostrzewa
* @author Joe Grandja
* @since 0.0.1
* @see AuthenticationConverter
* @see OAuth2ClientAuthenticationToken
* @see OAuth2ClientAuthenticationFilter
*/
public final class ClientSecretBasicAuthenticationConverter implements AuthenticationConverter {
@Nullable
@Override
public Authentication convert(HttpServletRequest request) {
String header = request.getHeader(HttpHeaders.AUTHORIZATION);
if (header == null) {
return null;
}
String[] parts = header.split("\\s");
if (!parts[0].equalsIgnoreCase("Basic")) {
return null;
}
if (parts.length != 2) {
throw new OAuth2AuthenticationException(OAuth2ErrorCodes.INVALID_REQUEST);
}
byte[] decodedCredentials;
try {
decodedCredentials = Base64.getDecoder().decode(
parts[1].getBytes(StandardCharsets.UTF_8));
} catch (IllegalArgumentException ex) {
throw new OAuth2AuthenticationException(new OAuth2Error(OAuth2ErrorCodes.INVALID_REQUEST), ex);
}
String credentialsString = new String(decodedCredentials, StandardCharsets.UTF_8);
String[] credentials = credentialsString.split(":", 2);
if (credentials.length != 2 ||
!StringUtils.hasText(credentials[0]) ||
!StringUtils.hasText(credentials[1])) {
throw new OAuth2AuthenticationException(OAuth2ErrorCodes.INVALID_REQUEST);
}
String clientID;
String clientSecret;
try {
clientID = URLDecoder.decode(credentials[0], StandardCharsets.UTF_8.name());
clientSecret = URLDecoder.decode(credentials[1], StandardCharsets.UTF_8.name());
} catch (Exception ex) {
throw new OAuth2AuthenticationException(new OAuth2Error(OAuth2ErrorCodes.INVALID_REQUEST), ex);
}
return new OAuth2ClientAuthenticationToken(clientID, ClientAuthenticationMethod.CLIENT_SECRET_BASIC, clientSecret,
OAuth2EndpointUtils.getParametersIfMatchesAuthorizationCodeGrantRequest(request));
}
}