OsiamSecurityExpressionMethods.java

package org.osiam.security.authorization;

import com.google.common.base.Splitter;
import org.osiam.resources.scim.User;
import org.springframework.security.core.Authentication;
import org.springframework.security.oauth2.provider.expression.OAuth2ExpressionUtils;
import org.springframework.security.web.FilterInvocation;

import java.net.URI;
import java.net.URISyntaxException;
import java.util.List;
import java.util.Locale;

public class OsiamSecurityExpressionMethods {

    private final Authentication authentication;
    private final FilterInvocation filterInvocation;

    public OsiamSecurityExpressionMethods(Authentication authentication, FilterInvocation filterInvocation) {
        this.authentication = authentication;
        this.filterInvocation = filterInvocation;
    }

    public boolean hasScopeForHttpMethod() {
        return OAuth2ExpressionUtils.hasAnyScope(authentication, new String[]{getHttpMethod()});
    }

    private String getHttpMethod() {
        return filterInvocation.getRequest().getMethod().toUpperCase(Locale.ENGLISH);
    }

    public boolean isOwnerOfResource() {
        if (!(authentication.getPrincipal() instanceof User)) {
            return false;
        }

        final User user = (User) authentication.getPrincipal();
        final String userId = user.getId();
        final String requestUrl = filterInvocation.getRequestUrl();

        if (!requestUrl.startsWith("/Users")) {
            return false;
        }

        try {
            String path = new URI(requestUrl).getPath();
            List<String> pathSegments = Splitter.on('/').omitEmptyStrings().trimResults().splitToList(path);

            if (pathSegments.size() < 2) {
                return false;
            }

            String resourceId = pathSegments.get(1);

            if (userId.equals(resourceId)) {
                return true;
            }
        } catch (URISyntaxException e) {
            return false;
        }

        return false;
    }
}