// access_token 처리, refresh_token 처리
// grant_type이 password 와 client_credentials 인 경우는 if 문 블럭만 작성하였음. 추후 작성해야 함.
@RequestMapping(value = "token")
public String accessToken(RequestAccessTokenVO ratVO, Model model, HttpServletRequest request)
throws OAuth2Exception {
String json = "";
// grant type이 무엇이냐에 따라 각기 다른 처리
// password, client_credential은 미구현.. 추후 구현 요망됨.
System.out.println("### token flow 1");
System.out.println("### grant_type : " + ratVO.getGrant_type());
if (ratVO.getGrant_type().equals(OAuth2Constant.GRANT_TYPE_AUTHORIZATION_CODE)) {
ResponseAccessTokenVO resVO = accessTokenServerFlow(ratVO, request);
json = OAuth2Util.getJSONFromObject(resVO);
} else if (ratVO.getGrant_type().equals(OAuth2Constant.GRANT_TYPE_PASSWORD)) {
// 차후 구현할 것
throw new OAuth2Exception(500, OAuth2ErrorConstant.UNSUPPORTED_RESPONSE_TYPE);
} else if (ratVO.getGrant_type().equals(OAuth2Constant.GRANT_TYPE_CLIENT_CREDENTIALS)) {
// 차후 구현할 것
throw new OAuth2Exception(500, OAuth2ErrorConstant.UNSUPPORTED_RESPONSE_TYPE);
} else if (ratVO.getGrant_type().equals(OAuth2Constant.GRANT_TYPE_REFRESH_TOKEN)) {
// refresh token 사용 여부에 따라 값이 달라짐.
if (OAuth2Constant.USE_REFRESH_TOKEN) {
ResponseAccessTokenVO resVO = refreshTokenFlow(ratVO, request);
json = OAuth2Util.getJSONFromObject(resVO);
} else {
throw new OAuth2Exception(500, OAuth2ErrorConstant.UNSUPPORTED_RESPONSE_TYPE);
}
} else {
throw new OAuth2Exception(500, OAuth2ErrorConstant.UNSUPPORTED_RESPONSE_TYPE);
}
model.addAttribute("json", json);
return "json/json";
}
// grant_type이 authorization_code일 때
private ResponseAccessTokenVO refreshTokenFlow(
RequestAccessTokenVO ratVO, HttpServletRequest request) throws OAuth2Exception {
// 1. 전달된 refresh Token과
// GET 방식일 때는 Client ID와 Client Secret은 Authorization Header를 통해 전달되어야 함.
if (request.getMethod().equalsIgnoreCase("GET")) {
String authHeader = (String) request.getHeader("Authorization");
if (authHeader == null || authHeader.equals("")) {
throw new OAuth2Exception(400, OAuth2ErrorConstant.INVALID_PARAMETER);
}
// Basic 인증 헤더 파싱
OAuth2Util.parseBasicAuthHeader(authHeader, ratVO);
}
// 2. ClientID, Secret 모두 전달되었는지 여부 --> 존재 여부 확인
if (ratVO.getClient_id() == null || ratVO.getClient_secret() == null) {
throw new OAuth2Exception(400, OAuth2ErrorConstant.INVALID_PARAMETER);
}
// 3. clientID 와 client_secret의 일치여부
ClientVO cVOTemp = new ClientVO();
cVOTemp.setClient_id(ratVO.getClient_id());
ClientVO cVO = null;
try {
cVO = dao.getClientOne(cVOTemp);
} catch (Exception e) {
throw new OAuth2Exception(500, OAuth2ErrorConstant.SERVER_ERROR);
}
if (cVO == null) {
throw new OAuth2Exception(500, OAuth2ErrorConstant.UNAUTHORIZED_CLIENT);
}
if (ratVO.getClient_secret() != null
&& !cVO.getClient_secret().equals(ratVO.getClient_secret())) {
throw new OAuth2Exception(500, OAuth2ErrorConstant.UNAUTHORIZED_CLIENT);
}
// 4. refresh token의 일치 여부
if (ratVO.getRefresh_token() == null) {
throw new OAuth2Exception(400, OAuth2ErrorConstant.INVALID_PARAMETER);
}
TokenVO tVOTemp = new TokenVO();
tVOTemp.setRefresh_token(ratVO.getRefresh_token());
TokenVO tVO = null;
try {
tVO = dao.selectRefreshToken(tVOTemp);
} catch (Exception e) {
e.printStackTrace();
throw new OAuth2Exception(500, OAuth2ErrorConstant.SERVER_ERROR);
}
if (tVO == null) {
throw new OAuth2Exception(400, OAuth2ErrorConstant.INVALID_TOKEN);
}
// 5. TokenVO의 accessToken 갱신 --> DB 업데이트 -->
// --> refreshToken 값 없이 ResponseAccessTokenVO객체 생성 --> JSON 포맷으로 응답
tVO.setAccess_token(OAuth2Util.generateToken());
tVO.setCreated_at(OAuth2Util.getCurrentTimeStamp());
try {
dao.updateAccessToken(tVO);
} catch (Exception e) {
e.printStackTrace();
throw new OAuth2Exception(500, OAuth2ErrorConstant.SERVER_ERROR);
}
ResponseAccessTokenVO resVO =
new ResponseAccessTokenVO(
tVO.getAccess_token(),
tVO.getToken_type(),
tVO.getExpires_in(),
null,
ratVO.getState(),
tVO.getCreated_at());
return resVO;
}
// grant_type이 authorization_code일 때
private ResponseAccessTokenVO accessTokenServerFlow(
RequestAccessTokenVO ratVO, HttpServletRequest request) throws OAuth2Exception {
// GET 방식일 때는 Client ID와 Client Secret은 Authorization Header를 통해 전달되어야 함.
System.out.println("### token flow 2");
if (request.getMethod().equalsIgnoreCase("GET")) {
String authHeader = (String) request.getHeader("Authorization");
if (authHeader == null || authHeader.equals("")) {
throw new OAuth2Exception(400, OAuth2ErrorConstant.INVALID_PARAMETER);
}
// Basic 인증 헤더 파싱
OAuth2Util.parseBasicAuthHeader(authHeader, ratVO);
}
// 1. ClientID, Secret 모두 전달되었는지 여부 --> 존재 여부 확인
System.out.println("### token flow 3");
if (ratVO.getClient_id() == null || ratVO.getClient_secret() == null) {
throw new OAuth2Exception(400, OAuth2ErrorConstant.INVALID_PARAMETER);
}
ClientVO cVOTemp = new ClientVO();
cVOTemp.setClient_id(ratVO.getClient_id());
cVOTemp.setClient_secret(ratVO.getClient_secret());
ClientVO cVO = null;
try {
cVO = dao.getClientOne(cVOTemp);
} catch (Exception e) {
e.printStackTrace();
throw new OAuth2Exception(500, OAuth2ErrorConstant.SERVER_ERROR);
}
// 1.2 client 존재 여부 확인
System.out.println("### token flow 4");
if (cVO == null) {
throw new OAuth2Exception(401, OAuth2ErrorConstant.UNAUTHORIZED_CLIENT);
}
// 2. redirect_uri 일치 여부 확인
System.out.println("### token flow 5");
if (!ratVO.getRedirect_uri().equals(cVO.getRedirect_uri())) {
throw new OAuth2Exception(400, OAuth2ErrorConstant.NOT_MATCH_REDIRECT_URI);
}
// 3. code값 일치 여부 확인
System.out.println("### token flow 6");
if (ratVO.getCode() == null) {
throw new OAuth2Exception(400, OAuth2ErrorConstant.INVALID_PARAMETER);
}
TokenVO tVOTemp = new TokenVO();
tVOTemp.setCode(ratVO.getCode());
TokenVO tVO = null;
try {
tVO = dao.selectTokenByCode(tVOTemp);
} catch (Exception e) {
e.printStackTrace();
throw new OAuth2Exception(500, OAuth2ErrorConstant.SERVER_ERROR);
}
if (tVO == null) {
throw new OAuth2Exception(400, OAuth2ErrorConstant.INVALID_CODE);
}
// 4. expire되었는지 여부 확인, refresh token 사용 여부에 따라 결정함.
if (OAuth2Constant.USE_REFRESH_TOKEN) {
System.out.println("### token flow 7");
long expires = tVO.getCreated_at() + tVO.getExpires_in();
if (System.currentTimeMillis() > expires) {
// 토큰 생성되고 한참 뒤에 code로 access token을 요청하는 것은 금지
throw new OAuth2Exception(400, OAuth2ErrorConstant.EXPIRED_TOKEN);
}
}
// 5. 전달받은 state값 그대로 전달(CSRF 공격 방지용)
// 6. ResponseAccessToken객체 생성 --> json 포맷 응답
System.out.println("### token flow 9");
ResponseAccessTokenVO resVO = new ResponseAccessTokenVO();
resVO.setIssued_at(tVO.getCreated_at());
resVO.setState(ratVO.getState());
resVO.setToken_type(tVO.getToken_type());
if (OAuth2Constant.USE_REFRESH_TOKEN) {
resVO.setAccess_token(tVO.getAccess_token());
resVO.setExpires_in(tVO.getExpires_in());
resVO.setRefresh_token(tVO.getRefresh_token());
} else {
// 6.1. password를 확보하기 위해 UserVO 객체 획득
// ResponsToken을 생성하고 나면 token 테이블의 레코드 삭제
UserVO uVOTemp = new UserVO();
uVOTemp.setUserid(tVO.getUserid());
UserVO uVO = null;
try {
uVO = dao.getUserInfo(uVOTemp);
} catch (Exception e) {
e.printStackTrace();
throw new OAuth2Exception(500, OAuth2ErrorConstant.SERVER_ERROR);
}
if (uVO == null) {
throw new OAuth2Exception(500, OAuth2ErrorConstant.INVALID_USER);
}
// token 테이블 레코드 삭제
try {
dao.deleteToken(tVO);
} catch (Exception e) {
e.printStackTrace();
throw new OAuth2Exception(500, OAuth2ErrorConstant.SERVER_ERROR);
}
resVO.setAccess_token(
this.tokenService.generateAccessToken(
cVO.getClient_id(), cVO.getClient_secret(), uVO.getUserid(), uVO.getPassword()));
}
return resVO;
}