我在申请认证时使用shiro.我使用散列密码和盐,我将它们存储在我的数据库中,如下所示:
private User createUserWithHashedPassword(String inName,String inFirstName,String inLastName,String inPassword){ ByteSource salt = randomNumberGenerator.nextBytes(32); byte[] byteTabSalt = salt.getBytes(); String strSalt = byteArrayToHexString(byteTabSalt); String hashedPasswordBase64 = new Sha256Hash(inPassword,salt,1024).toBase64(); return new User(inName,inFirstName,inLastName,hashedPasswordBase64,strSalt); }
我在我的数据库中使用String存储salt.现在在我的领域我想从数据库中获取我的数据,我使用了一个transactionnal服务.但是我的salt是一个Strong,所以我希望它使用静态方法返回ByteSource类型:
ByteSource byteSourceSalt = Util.bytes(salt); //where the salt is a String
但是当我创建我的SaltedAuthenticationInfo时,它不会授权.
我认为我的问题来自我的转换方法:
private String byteArrayToHexString(byte[] bArray){ StringBuffer buffer = new StringBuffer(); for(byte b : bArray) { buffer.append(Integer.toHexString(b)); buffer.append(" "); } return buffer.toString().toUpperCase(); }
谢谢你的帮助.
解决方法
正如在优秀的答案
https://stackoverflow.com/a/20206115/603901中所提到的,Shiro的DefaultPasswordService已经为每个密码生成了唯一的salt.
但是,不需要实现自定义PasswordService来向每个用户的salt添加私有盐(有时称为“pepper”).私有盐可以在shiro.ini中配置:
[main] hashService = org.apache.shiro.crypto.hash.DefaultHashService hashService.hashIterations = 500000 hashService.hashAlgorithmName = SHA-256 hashService.generatePublicSalt = true # privateSalt needs to be base64-encoded in shiro.ini but not in the Java code hashService.privateSalt = myVERYSECRETBase64EncodedSalt passwordMatcher = org.apache.shiro.authc.credential.PasswordMatcher passwordService = org.apache.shiro.authc.credential.DefaultPasswordService passwordService.hashService = $hashService passwordMatcher.passwordService = $passwordService
DefaultHashService hashService = new DefaultHashService(); hashService.setHashIterations(HASH_ITERATIONS); // 500000 hashService.setHashAlgorithmName(Sha256Hash.ALGORITHM_NAME); hashService.setPrivateSalt(new SimpleByteSource(PRIVATE_SALT)); // Same salt as in shiro.ini,but NOT base64-encoded. hashService.setGeneratePublicSalt(true); DefaultPasswordService passwordService = new DefaultPasswordService(); passwordService.setHashService(hashService); String encryptedPassword = passwordService.encryptPassword("PasswordForThisUser");
生成的哈希看起来像这样:
$shiro1$SHA-256$500000$An4HRyqMJlZ58utACtyGDQ==$nKbIY9Nd9vC89G4SjdnDfka49mZiesjWgDsO/4Ly4Qs=
私有盐不存储在数据库中,如果攻击者获得对数据库转储的访问权限,则很难破解密码.
此示例是使用shiro-1.2.2创建的
感谢https://github.com/Multifarious/shiro-jdbi-realm/blob/master/src/test/resources/shiro.ini获取shiro.ini语法的帮助