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Adding role based scope issuing for exchange grant #13053

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Adding role based scope issuing for exchange grant #13053

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55 changes: 51 additions & 4 deletions ...bon.apimgt.impl/src/main/java/org/wso2/carbon/apimgt/impl/issuers/SystemScopesIssuer.java
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Original file line number Diff line number Diff line change
Expand Up @@ -337,14 +337,21 @@ public List<String> getScopes(OAuthTokenReqMessageContext tokReqMsgCtx) {
String isSAML2Enabled = System.getProperty(APIConstants.SystemScopeConstants.CHECK_ROLES_FROM_SAML_ASSERTION);
String isRetrieveRolesFromUserStoreForScopeValidation = System
.getProperty(APIConstants.SystemScopeConstants.RETRIEVE_ROLES_FROM_USERSTORE_FOR_SCOPE_VALIDATION);
if (GrantType.SAML20_BEARER.toString().equals(grantType) && Boolean.parseBoolean(isSAML2Enabled)) {
if (APIConstants.OAuthConstants.TOKEN_EXCHANGE.equals(grantType)) {
configureForJWTGrantOrExchangeGrant(tokReqMsgCtx, true);
Map<ClaimMapping, String> userAttributes = authenticatedUser.getUserAttributes();
if (tokReqMsgCtx.getProperty(APIConstants.SystemScopeConstants.ROLE_CLAIM) != null) {
userRoles = getRolesFromUserAttribute(userAttributes,
tokReqMsgCtx.getProperty(APIConstants.SystemScopeConstants.ROLE_CLAIM).toString());
}
} else if (GrantType.SAML20_BEARER.toString().equals(grantType) && Boolean.parseBoolean(isSAML2Enabled)) {
authenticatedUser.setUserStoreDomain("FEDERATED");
tokReqMsgCtx.setAuthorizedUser(authenticatedUser);
Assertion assertion = (Assertion) tokReqMsgCtx.getProperty(APIConstants.SystemScopeConstants.SAML2_ASSERTION);
userRoles = getRolesFromAssertion(assertion);
} else if (APIConstants.SystemScopeConstants.OAUTH_JWT_BEARER_GRANT_TYPE.equals(grantType) && !(Boolean
.parseBoolean(isRetrieveRolesFromUserStoreForScopeValidation))) {
configureForJWTGrant(tokReqMsgCtx);
configureForJWTGrantOrExchangeGrant(tokReqMsgCtx, false);
Map<ClaimMapping, String> userAttributes = authenticatedUser.getUserAttributes();
if (tokReqMsgCtx.getProperty(APIConstants.SystemScopeConstants.ROLE_CLAIM) != null) {
userRoles = getRolesFromUserAttribute(userAttributes,
Expand Down Expand Up @@ -559,13 +566,18 @@ protected String[] getRolesFromAssertion(Assertion assertion) {
return SystemScopeUtils.getRolesFromAssertion(assertion);
}

protected void configureForJWTGrant(OAuthTokenReqMessageContext tokReqMsgCtx) {
protected void configureForJWTGrantOrExchangeGrant(OAuthTokenReqMessageContext tokReqMsgCtx,
boolean isExchangeGrant) {

SignedJWT signedJWT = null;
JWTClaimsSet claimsSet = null;
String[] roles = null;
try {
signedJWT = getSignedJWT(tokReqMsgCtx);
if (isExchangeGrant) {
signedJWT = getSignedJWTFromSubjectToken(tokReqMsgCtx);
} else {
signedJWT = getSignedJWT(tokReqMsgCtx);
}
} catch (IdentityOAuth2Exception e) {
log.error("Couldn't retrieve signed JWT", e);
}
Expand Down Expand Up @@ -658,6 +670,41 @@ private SignedJWT getSignedJWT(OAuthTokenReqMessageContext tokReqMsgCtx) throws
return signedJWT;
}

/**
* Method to parse the subject token and retrieve the signed JWT
*
* @param tokReqMsgCtx request
* @return SignedJWT object
* @throws IdentityOAuth2Exception exception thrown due to a parsing error
*/
private SignedJWT getSignedJWTFromSubjectToken(OAuthTokenReqMessageContext tokReqMsgCtx) throws IdentityOAuth2Exception {

RequestParameter[] params = tokReqMsgCtx.getOauth2AccessTokenReqDTO().getRequestParameters();
String subjectToken = null;
SignedJWT signedJWT;
for (RequestParameter param : params) {
if (param.getKey().equals(APIConstants.OAuthConstants.SUBJECT_TOKEN)) {
subjectToken = param.getValue()[0];
break;
}
}
if (StringUtils.isEmpty(subjectToken)) {
String errorMessage = "Error while retrieving subjectToken";
throw new IdentityOAuth2Exception(errorMessage);
}

try {
signedJWT = SignedJWT.parse(subjectToken);
if (log.isDebugEnabled()) {
log.debug(signedJWT);
}
} catch (ParseException e) {
String errorMessage = "Error while parsing the JWT.";
throw new IdentityOAuth2Exception(errorMessage, e);
}
return signedJWT;
}

/**
* Method to retrieve claims from the JWT
*
Expand Down
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