MySql Password Encoder

개인적으로 자주 사용하는 Spring Security Password Encoder 입니다.

MySql 의 password() 펑션 알고리즘 사용합니다.

import java.security.GeneralSecurityException;
import java.security.MessageDigest;

import org.springframework.security.crypto.password.PasswordEncoder;

public class MySqlPasswordEncoder implements PasswordEncoder {

	@Override
	public String encode(CharSequence rawPassword) {
		if (rawPassword == null) {
			throw new NullPointerException();
		}

		byte[] bpara = new byte[rawPassword.length()];

		byte[] rethash;
		int i;
		for (i = 0; i < rawPassword.length(); i++)
			bpara[i] = (byte) (rawPassword.charAt(i) & 0xff);
		try {
			MessageDigest sha1er = MessageDigest.getInstance("SHA1");
			rethash = sha1er.digest(bpara); // stage1
			rethash = sha1er.digest(rethash); // stage2
		} catch (GeneralSecurityException e) {
			throw new RuntimeException(e);
		}
		StringBuffer r = new StringBuffer(41);
		r.append("*");
		for (i = 0; i < rethash.length; i++) {
			String x = Integer.toHexString(rethash[i] & 0xff).toUpperCase();
			if (x.length() < 2)
				r.append("0");
			r.append(x);
		}

		return r.toString();
	}

	@Override
	public boolean matches(CharSequence rawPassword, String encodedPassword) {
		if (encodedPassword == null || rawPassword == null) {
			return false;
		}

		if (!encodedPassword.equals(encode(rawPassword))) {
			return false;
		}

		return true;
	}

}

적용 예시..

	<security:authentication-manager alias="authenticationManager">
		<security:authentication-provider user-service-ref="userService">
			<security:password-encoder ref="passwordEncoder" />
		</security:authentication-provider>
	</security:authentication-manager>

	<bean id="passwordEncoder" class="MySqlPasswordEncoder">