1 // Copyright 2021 Code Intelligence GmbH 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package com.example; 16 17 import com.code_intelligence.jazzer.api.FuzzedDataProvider; 18 import java.lang.annotation.ElementType; 19 import java.lang.annotation.Retention; 20 import java.lang.annotation.RetentionPolicy; 21 import java.lang.annotation.Target; 22 import javax.validation.*; 23 24 class UserData { UserData(String email)25 public UserData(String email) { 26 this.email = email; 27 } 28 29 @ValidEmailConstraint private String email; 30 } 31 32 @Constraint(validatedBy = InsecureEmailValidator.class) 33 @Target({ElementType.METHOD, ElementType.FIELD}) 34 @Retention(RetentionPolicy.RUNTIME) 35 @interface ValidEmailConstraint { message()36 String message() default "Invalid email address"; groups()37 Class<?>[] groups() default {}; payload()38 Class<? extends Payload>[] payload() default {}; 39 } 40 41 public class ExpressionLanguageInjection { 42 final private static Validator validator = 43 Validation.buildDefaultValidatorFactory().getValidator(); 44 fuzzerTestOneInput(FuzzedDataProvider data)45 public static void fuzzerTestOneInput(FuzzedDataProvider data) { 46 UserData uncheckedUserData = new UserData(data.consumeRemainingAsString()); 47 validator.validate(uncheckedUserData); 48 } 49 } 50