【Spring Boot】Spring Boot 2.x + Spring Security OAuth2 2.3.3 出现 bad client credentials 错误的踩坑记录

矫情吗；* 2022-04-03 15:50 530阅读 0赞

# 【Spring Boot】Spring Boot 2.x + Spring Security OAuth2 2.3.3 出现 bad client credentials 错误的踩坑记录 #

环境：

spring boot 2.0.4.RELEASE

spring security oauth 2.3.3.RELEASE

OAuth2的配置

`@Configuration`

`@EnableAuthorizationServer`

`public class OAuth2AuthorizationConfig extends AuthorizationServerConfigurerAdapter {`

`@Autowired`

`private AuthenticationManager authenticationManager;`

`@Autowired`

`private UserDetailsService userService;`

`@Override`

`public void configure(AuthorizationServerSecurityConfigurer security) throws Exception {`

`security.allowFormAuthenticationForClients();`

`}`

`@Override`

`public void configure(ClientDetailsServiceConfigurer clients) throws Exception {`

`clients.inMemory()`

`.withClient("client_1")`

`.secret("123456")`

`.authorizedGrantTypes("password", "refresh_token")`

`.scopes("read", "write")`

`.accessTokenValiditySeconds(10000)`

`.refreshTokenValiditySeconds(10000);`

`}`

`@Override`

`public void configure(AuthorizationServerEndpointsConfigurer endpoints){`

`endpoints.authenticationManager(authenticationManager)`

`.userDetailsService(userService);`

`}`

Spring Security配置

`@Configuration`

`public class SecurityConfig extends WebSecurityConfigurerAdapter {`

`@Autowired`

`UserDetailsService userDetailsService;`

`@Bean`

`public PasswordEncoder passwordEncoder() {`

`return new BCryptPasswordEncoder();`

`}`

`@Bean`

`@Override`

`public AuthenticationManager authenticationManagerBean() throws Exception {`

`return super.authenticationManagerBean();`

`}`

`@Override`

`protected void configure(AuthenticationManagerBuilder auth) throws Exception {`

`auth.userDetailsService(userDetailsService);`

`}`

`@Override`

`protected void configure(HttpSecurity http) throws Exception {`

`}`

使用postman进行请求时，会提示bad client credentials

![70][]

`{`

`"error": "invalid_client",`

`"error_description": "Bad client credentials"`

`}`

该请求甚至没有走到 UserDetailService 就已经被返回，很是诡异。

在网上搜索，查找相关技术博客，都无果。

其实问题出在 PasswordEncoder 身上，网上很多说明都没有写这个Bean的配置，如果不配置这个Bean的话AuthenticationManager 是直接初始化失败的，而Spring Security自带的这个Encoder，是对密码进行了一层加密，如果我们传铭文进去是会被直接报warn的log并且返回。

正确的使用姿势是：

`@Bean`

`public PasswordEncoder passwordEncoder() {`

`return new PasswordEncoder() {`

`@Override`

`public String encode(CharSequence charSequence) {`

`return charSequence.toString();`

`}`

`@Override`

`public boolean matches(CharSequence charSequence, String s) {`

`return Objects.equals(charSequence.toString(),s);`

`}`