Need to create oAuth2 token manually without password

Question

I have implemented oAuth2 with spring security and it is working fine for me. But Now I want to create user token from back-end manually without password. Because I have only us

Answer 1

Assign access token while signup process, Spring boot. Call getAccessToken(user) from anywhere in your app code.

public OAuth2AccessToken getAccessToken(User user) {
    HashMap authorizationParameters = new HashMap();
    authorizationParameters.put("scope", "read");
    authorizationParameters.put("username", user.getEmail());
    authorizationParameters.put("client_id", clientId);
    authorizationParameters.put("grant", "password");

    Set authorities = new HashSet();
    user.getRoles().forEach((role) -> {
        Role rol = roleRepository.findByName(role.getName());
        authorities.add(new SimpleGrantedAuthority(rol.getName()));
    });

    Set responseType = new HashSet();
    responseType.add("password");

    Set scopes = new HashSet();
    scopes.add("read");
    scopes.add("write");

    OAuth2Request authorizationRequest = new OAuth2Request(authorizationParameters, clientId, authorities, true,
            scopes, null, "", responseType, null);

    org.springframework.security.core.userdetails.User userPrincipal = new org.springframework.security.core.userdetails.User(
            user.getEmail(), user.getPassword(), authorities);
    UsernamePasswordAuthenticationToken authenticationToken = new UsernamePasswordAuthenticationToken(userPrincipal,
            null, authorities);

    OAuth2Authentication authenticationRequest = new OAuth2Authentication(authorizationRequest,
            authenticationToken);
    authenticationRequest.setAuthenticated(true);
    OAuth2AccessToken accessToken = tokenServices().createAccessToken(authenticationRequest);

    return accessToken;
}

@Bean
TokenEnhancerChain enhancerChain() {
    TokenEnhancerChain enhancerChain = new TokenEnhancerChain();
    enhancerChain.setTokenEnhancers(Arrays.asList(customTokenEnhancer, accessTokenConverter()));
    return enhancerChain;
}

@Bean
public JwtAccessTokenConverter accessTokenConverter() {
    JwtAccessTokenConverter converter = new JwtAccessTokenConverter();
    converter.setSigningKey(signingKey);
    return converter;
}

@Bean
public TokenStore tokenStore() {
    return new JwtTokenStore(accessTokenConverter());
}

@Bean
@Primary
public DefaultTokenServices tokenServices() {
    DefaultTokenServices defaultTokenServices = new DefaultTokenServices();
    defaultTokenServices.setTokenStore(tokenStore());
    defaultTokenServices.setSupportRefreshToken(true);
    defaultTokenServices.setTokenEnhancer(enhancerChain());
    return defaultTokenServices;
}