We are evaluating Shiro for a custom Saas app that we are building. Seems like a great framework does does 90% of what we want, out of the box. My understanding of Shiro is basic, and here is what I am trying to accomplish.
- We have multiple clients, each with an identical database
- All authorization (Roles/Permissions) will be configured by the clients within their own dedicated database
- Each client will have a unique Virtual host eg. client1.mycompany.com, client2.mycompany.com etc
Scenario 1
Authentication done via LDAP (MS Active Directory)
Create unique users in LDAP, make app aware of LDAP users, and have client admins provision them into whatever roles..
Scenario 2
Authentication also done via JDBC Relam in their database
Questions:
Common to Sc 1 & 2 How can I tell Shiro which database to use? I realize it has to be done via some sort of custom authentication filter, but can someone guide me to the most logical way ? Plan to use the virtual host url to tell shiro and mybatis which DB to use.
Do I create one realm per client?
Sc 1 (User names are unique across clients due to LDAP) If user jdoe is shared by client1 and client2, and he is authenticated via client1 and tries to access a resource of client2, will Shiro permit or have him login again?
Sc 2 (User names unique within database only) If both client 1 and client 2 create a user called jdoe, then will Shiro be able to distinguish between jdoe in Client 1 and jdoe in Client 2 ?
My Solution based on Les's input..
public class MultiTenantAuthenticator extends ModularRealmAuthenticator {
@Override
protected AuthenticationInfo doAuthenticate(AuthenticationToken authenticationToken) throws AuthenticationException {
assertRealmsConfigured();
TenantAuthenticationToken tat = null;
Realm tenantRealm = null;
if (!(authenticationToken instanceof TenantAuthenticationToken)) {
throw new AuthenticationException("Unrecognized token , not a typeof TenantAuthenticationToken ");
} else {
tat = (TenantAuthenticationToken) authenticationToken;
tenantRealm = lookupRealm(tat.getTenantId());
}
return doSingleRealmAuthentication(tenantRealm, tat);
}
protected Realm lookupRealm(String clientId) throws AuthenticationException {
Collection<Realm> realms = getRealms();
for (Realm realm : realms) {
if (realm.getName().equalsIgnoreCase(clientId)) {
return realm;
}
}
throw new AuthenticationException("No realm configured for Client " + clientId);
}
}
New Type of token..
public final class TenantAuthenticationToken extends UsernamePasswordToken {
public enum TENANT_LIST {
CLIENT1, CLIENT2, CLIENT3
}
private String tenantId = null;
public TenantAuthenticationToken(final String username, final char[] password, String tenantId) {
setUsername(username);
setPassword(password);
setTenantId(tenantId);
}
public TenantAuthenticationToken(final String username, final String password, String tenantId) {
setUsername(username);
setPassword(password != null ? password.toCharArray() : null);
setTenantId(tenantId);
}
public String getTenantId() {
return tenantId;
}
public void setTenantId(String tenantId) {
try {
TENANT_LIST.valueOf(tenantId);
} catch (IllegalArgumentException ae) {
throw new UnknownTenantException("Tenant " + tenantId + " is not configured " + ae.getMessage());
}
this.tenantId = tenantId;
}
}
Modify my inherited JDBC Realm
public class TenantSaltedJdbcRealm extends JdbcRealm {
public TenantSaltedJdbcRealm() {
// Cant seem to set this via beanutils/shiro.ini
this.saltStyle = SaltStyle.COLUMN;
}
@Override
public boolean supports(AuthenticationToken token) {
return super.supports(token) && (token instanceof TenantAuthenticationToken);
}
And finally use the new token when logging in
// This value is set via an Intercepting Servlet Filter
String client = (String)request.getAttribute("TENANT_ID");
if (!currentUser.isAuthenticated()) {
TenantAuthenticationToken token = new TenantAuthenticationToken(user,pwd,client);
token.setRememberMe(true);
try {
currentUser.login(token);
} catch (UnknownAccountException uae) {
log.info("There is no user with username of " + token.getPrincipal());
} catch (IncorrectCredentialsException ice) {
log.info("Password for account " + token.getPrincipal() + " was incorrect!");
} catch (LockedAccountException lae) {
log.info("The account for username " + token.getPrincipal() + " is locked. "
+ "Please contact your administrator to unlock it.");
} // ... catch more exceptions here (maybe custom ones specific to your application?
catch (AuthenticationException ae) {
//unexpected condition? error?
ae.printStackTrace();
}
}
}
