how to authenticate user in spring security with password encryption - spring-mvc

Question

i m using spring security in my application.in my database .the password is in encrypted form.so in login when i m sending the password,that password should be converted to the encrypted form then i should be able to compare the password which i m sending and the password which is present in the database.if it matches,successful login should occur.
this is my spring-security.xml
<authentication-manager">
<authentication-provider >
<password-encoder ref="encoder"/>
<jdbc-user-service data-source-ref="dataSource"
users-by-username-query="select email,password from user where email=?"
/>
</authentication-provider>
</authentication-manager>
<beans:bean id="encoder" class="org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder"/>
and here is my user table which contains email,password,contactno,address.
any help how can i check the encrypted password value for the password which user entering and how to check whether it matechs or not?

Answer 1

You can write your own PasswordEncoder to transfer you user to spring secure.
#Component("PasswordEncoder")
public class PasswordEncoderimpl implements PasswordEncoder{
#Override
public String encodePassword(String rawPass, Object salt) {
//it is the algorithm the transfer password to encrypted password
}
#Override
public boolean isPasswordValid(String encPass, String rawPass, Object salt) {
//encPass is the password in your database
//rawPass is the password user entering
//then you can write it like
return encPass.euqals(encodePassword(rawPass));
}
}
Then your spring-security.xml will be:
<authentication-manager>
<authentication-provider>
<password-encoder ref="PasswordEncoder">
</password-encoder>
</authentication-provider>
</authentication-manager>