使用 Spring 数据 REST 的密码编码

Password encoding with Spring Data REST

我应该如何使用 Spring 数据 REST 自动编码我实体提交的普通密码字段?

我正在使用 BCrypt 编码器,当客户端通过 POST、PUT 和 PATCH 发送请求时,我想自动对请求的密码字段进行编码。

@Entity
public class User {
  @NotNull
  private String username;
  @NotNull
  private String passwordHash;
  ...
  getters/setters/etc
  ...
}

首先,我尝试使用@HandleBeforeCreate 和@HandleBeforeSave 事件侦听器来解决,但是它的参数中的用户已经合并,所以我无法区分用户的新密码或旧密码哈希:

@HandleBeforeSave
protected void onBeforeSave(User user) {
    if (user.getPassword() != null) {
        account.setPassword(passwordEncoder.encode(account.getPassword()));
    }
    super.onBeforeSave(account);
}

是否可以在 setter 方法上使用 @Projection 和 SpEL?

密码字段修改setter方法即可,如下图:

public void setPassword(String password) {
        PasswordEncoder encoder = new BCryptPasswordEncoder();
        this.password = encoder.encode(password);
    }

参考: https://github.com/charybr/spring-data-rest-acl/blob/master/bookstore/src/main/java/sample/sdr/auth/bean/UserEntity.java

您可以实施 Jackson JsonDeserializer:

public class BCryptPasswordDeserializer extends JsonDeserializer<String> {

    public String deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException {
        ObjectCodec oc = jsonParser.getCodec();
        JsonNode node = oc.readTree(jsonParser);
        BCryptPasswordEncoder encoder = new BCryptPasswordEncoder();
        String encodedPassword = encoder.encode(node.asText());
        return encodedPassword;
    }
}

并将其应用于您的 JPA 实体 属性:

// The value of the password will always have a length of 
// 60 thanks to BCrypt
@Size(min = 60, max = 60)
@Column(name="password", nullable = false, length = 60)
@JsonDeserialize(using = BCryptPasswordDeserializer.class )
private String password;

对@robgmills 的一些增强 JsonDeserializer 解决方案:

  • 中Spring5介绍DelegatingPasswordEncoder。它更灵活,参见spring docs
  • 不需要每次反序列化时都创建PasswordEncoder
  • 一个大项目可能有几个 JsonDeserializer - 最好将它们放在内部 类.
  • 通常为获取请求隐藏编码密码。我用过@JsonProperty(access = JsonProperty.Access.WRITE_ONLY),见

对于 Spring 引导代码如下所示:

public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

    public static final PasswordEncoder PASSWORD_ENCODER = PasswordEncoderFactories.createDelegatingPasswordEncoder();

    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
       auth.userDetailsService(userDetailsService()).passwordEncoder(PASSWORD_ENCODER);
    }
    ....

public class JsonDeserializers {
    public static class PasswordDeserializer extends JsonDeserializer<String> {
        public String deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException {
            ObjectCodec oc = jsonParser.getCodec();
            JsonNode node = oc.readTree(jsonParser);
            String rawPassword = node.asText();
            return WebSecurityConfig.PASSWORD_ENCODER.encode(rawPassword);
        }
    }
    ...

@Entity
public class User ...

    @Column(name = "password")
    @Size(max = 256)
    @JsonProperty(access = JsonProperty.Access.WRITE_ONLY)
    @JsonDeserialize(using = JsonDeserializers.PasswordDeserializer.class)
    private String password;
    ...