spring boot Pbkf2PasswordEncoder 속도 빠르게 하기

방법 1. parameter만 바꾸기 (추천)

WebSecurityBeanFactory.java

import com.google.common.base.Charsets; import com.google.common.hash.Hashing; 
import org.springframework.beans.factory.annotation.Value; 
import org.springframework.context.annotation.Bean; 
import org.springframework.context.annotation.Configuration; 
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder; 
import org.springframework.security.crypto.password.DelegatingPasswordEncoder; 
import org.springframework.security.crypto.password.PasswordEncoder; 
import org.springframework.security.crypto.password.Pbkdf2PasswordEncoder;

@Configuration 
public class WebSecurityBeanFactory { 

    private String passwordSecret = "SECRET_KEY"; 

    @Bean 
    public PasswordEncoder passwordEncoder() {
        // encoding 기본형
        String idForEncode = "pbkdf2"; 
        Map<String, PasswordEncoder> encoders = new HashMap<>();

        // parameter - 시크릿키, iteration(기본: 185000, 숫자가 낮을 수록 빨라짐), 해쉬 길이 - 기본: 256 
        encoders.put("pbkdf2", new Pbkdf2PasswordEncoder(passwordSecret, 1, 256));
        return new DelegatingPasswordEncoder(idForEncode, encoders); 
    }
}

방법 2. 설정 새로 만들기

CustomPbkdf2PasswordEncoder.java

DEFAULT_ITERATIONS 185000 ==> 1 (낮을 수록 속도 빨라짐)

import java.security.GeneralSecurityException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Base64;

import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;

import org.springframework.security.crypto.codec.Hex;
import org.springframework.security.crypto.codec.Utf8;
import org.springframework.security.crypto.keygen.BytesKeyGenerator;
import org.springframework.security.crypto.keygen.KeyGenerators;
import org.springframework.security.crypto.password.PasswordEncoder;

import static org.springframework.security.crypto.util.EncodingUtils.concatenate;
import static org.springframework.security.crypto.util.EncodingUtils.subArray;

/**
 * A {@code PasswordEncoder} implementation that uses PBKDF2 with a configurable number of
 * iterations and a random 8-byte random salt value.
 * <p>
 * The width of the output hash can also be configured.
 * <p>
 * The algorithm is invoked on the concatenated bytes of the salt, secret and password.
 *
 * @author me
 * @author me
 * @since 4.1
 */
public class CustomPbkdf2PasswordEncoder implements PasswordEncoder {

    private static final int DEFAULT_HASH_WIDTH = 256;
    // private static final int DEFAULT_ITERATIONS = 185000;
    // custom: change iteration (딜레이 변경: 1초--> 딜레이 없음)
    private static final int DEFAULT_ITERATIONS = 1;

    private final BytesKeyGenerator saltGenerator = KeyGenerators.secureRandom();

    private final byte[] secret;
    private final int hashWidth;
    private final int iterations;
    private String algorithm = SecretKeyFactoryAlgorithm.PBKDF2WithHmacSHA1.name();
    private boolean encodeHashAsBase64;

    /**
     * Constructs a PBKDF2 password encoder with no additional secret value. There will be
     * {@value DEFAULT_ITERATIONS} iterations and a hash width of {@value DEFAULT_HASH_WIDTH}. The default is based upon aiming for .5
     * seconds to validate the password when this class was added.. Users should tune
     * password verification to their own systems.
     */
    public CustomPbkdf2PasswordEncoder() {
        this("");
    }

    /**
     * Constructs a standard password encoder with a secret value which is also included
     * in the password hash. There will be {@value DEFAULT_ITERATIONS} iterations and a hash width of {@value DEFAULT_HASH_WIDTH}.
     *
     * @param secret the secret key used in the encoding process (should not be shared)
     */
    public CustomPbkdf2PasswordEncoder(CharSequence secret) {
        this(secret, DEFAULT_ITERATIONS, DEFAULT_HASH_WIDTH);
    }

    /**
     * Constructs a standard password encoder with a secret value as well as iterations
     * and hash.
     *
     * @param secret the secret
     * @param iterations the number of iterations. Users should aim for taking about .5
     * seconds on their own system.
     * @param hashWidth the size of the hash
     */
    public CustomPbkdf2PasswordEncoder(CharSequence secret, int iterations, int hashWidth) {
        this.secret = Utf8.encode(secret);
        this.iterations = iterations;
        this.hashWidth = hashWidth;
    }

    /**
     * Sets the algorithm to use. See
     * <a href="https://docs.oracle.com/javase/8/docs/technotes/guides/security/StandardNames.html#SecretKeyFactory">SecretKeyFactory Algorithms</a>
     * @param secretKeyFactoryAlgorithm the algorithm to use (i.e.
     * {@code SecretKeyFactoryAlgorithm.PBKDF2WithHmacSHA1},
     * {@code SecretKeyFactoryAlgorithm.PBKDF2WithHmacSHA256},
     * {@code SecretKeyFactoryAlgorithm.PBKDF2WithHmacSHA512})
     * @since 5.0
     */
    public void setAlgorithm(SecretKeyFactoryAlgorithm secretKeyFactoryAlgorithm) {
        if (secretKeyFactoryAlgorithm == null) {
            throw new IllegalArgumentException("secretKeyFactoryAlgorithm cannot be null");
        }
        String algorithmName = secretKeyFactoryAlgorithm.name();
        try {
            SecretKeyFactory.getInstance(algorithmName);
        }
        catch (NoSuchAlgorithmException e) {
            throw new IllegalArgumentException("Invalid algorithm '" + algorithmName + "'.", e);
        }
        this.algorithm = algorithmName;
    }

    /**
     * Sets if the resulting hash should be encoded as Base64. The default is false which
     * means it will be encoded in Hex.
     * @param encodeHashAsBase64 true if encode as Base64, false if should use Hex
     * (default)
     */
    public void setEncodeHashAsBase64(boolean encodeHashAsBase64) {
        this.encodeHashAsBase64 = encodeHashAsBase64;
    }

    @Override
    public String encode(CharSequence rawPassword) {
        byte[] salt = this.saltGenerator.generateKey();
        byte[] encoded = encode(rawPassword, salt);
        return encode(encoded);
    }

    private String encode(byte[] bytes) {
        if (this.encodeHashAsBase64) {
            return Base64.getEncoder().encodeToString(bytes);
        }
        return String.valueOf(Hex.encode(bytes));
    }

    @Override
    public boolean matches(CharSequence rawPassword, String encodedPassword) {
        byte[] digested = decode(encodedPassword);
        byte[] salt = subArray(digested, 0, this.saltGenerator.getKeyLength());

        return MessageDigest.isEqual(digested, encode(rawPassword, salt));
    }

    private byte[] decode(String encodedBytes) {
        if (this.encodeHashAsBase64) {
            return Base64.getDecoder().decode(encodedBytes);
        }
        return Hex.decode(encodedBytes);
    }

    private byte[] encode(CharSequence rawPassword, byte[] salt) {
        try {
            PBEKeySpec spec = new PBEKeySpec(rawPassword.toString().toCharArray(),
                    concatenate(salt, this.secret), this.iterations, this.hashWidth);
            SecretKeyFactory skf = SecretKeyFactory.getInstance(this.algorithm);
            return concatenate(salt, skf.generateSecret(spec).getEncoded());
        }
        catch (GeneralSecurityException e) {
            throw new IllegalStateException("Could not create hash", e);
        }
    }

    /**
     * The Algorithm used for creating the {@link SecretKeyFactory}
     *
     * @since 5.0
     */
    public enum SecretKeyFactoryAlgorithm {
        PBKDF2WithHmacSHA1,
        PBKDF2WithHmacSHA256,
        PBKDF2WithHmacSHA512
    }
}

WebSecurityBeanFactory.java

import com.google.common.base.Charsets;
import com.google.common.hash.Hashing;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.DelegatingPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;




@Configuration
public class WebSecurityBeanFactory {

    private String passwordSecret = "SECRET_KEY";

    @Bean
    public PasswordEncoder passwordEncoder() {
        Map<String, PasswordEncoder> encoders = new HashMap<>();
        // encoding 기본형
        String idForEncode = "pbkdf2";

        encoders.put("pbkdf2", new CustomPbkdf2PasswordEncoder(passwordSecret));
        return new DelegatingPasswordEncoder(idForEncode, encoders);
    }