https://spring.io/spring-security: spring-security-crypto (spring.io)
  • Rob Winch
  • Joe Grandja 
/*
 * Copyright 2002-2017 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.security.crypto.factory;

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;
import org.springframework.security.crypto.scrypt.SCryptPasswordEncoder;

import java.util.HashMap;
import java.util.Map;


Used for creating PasswordEncoder instances 
Author:Rob Winch
Since:5.0
/**
 * Used for creating {@link PasswordEncoder} instances
 * @author Rob Winch
 * @since 5.0
 */
public class PasswordEncoderFactories {

	
Creates a DelegatingPasswordEncoder with default mappings. Additional mappings may be added and the encoding will be updated to conform with best practices. However, due to the nature of DelegatingPasswordEncoder the updates should not impact users. The mappings current are: 

Returns:the PasswordEncoder to use
/**
	 * Creates a {@link DelegatingPasswordEncoder} with default mappings. Additional
	 * mappings may be added and the encoding will be updated to conform with best
	 * practices. However, due to the nature of {@link DelegatingPasswordEncoder} the
	 * updates should not impact users. The mappings current are:
	 *
	 * <ul>
	 * <li>bcrypt - {@link BCryptPasswordEncoder} (Also used for encoding)</li>
	 * <li>ldap - {@link org.springframework.security.crypto.password.LdapShaPasswordEncoder}</li>
	 * <li>MD4 - {@link org.springframework.security.crypto.password.Md4PasswordEncoder}</li>
	 * <li>MD5 - {@code new MessageDigestPasswordEncoder("MD5")}</li>
	 * <li>noop - {@link org.springframework.security.crypto.password.NoOpPasswordEncoder}</li>
	 * <li>pbkdf2 - {@link Pbkdf2PasswordEncoder}</li>
	 * <li>scrypt - {@link SCryptPasswordEncoder}</li>
	 * <li>SHA-1 - {@code new MessageDigestPasswordEncoder("SHA-1")}</li>
	 * <li>SHA-256 - {@code new MessageDigestPasswordEncoder("SHA-256")}</li>
	 * <li>sha256 - {@link org.springframework.security.crypto.password.StandardPasswordEncoder}</li>
	 * </ul>
	 *
	 * @return the {@link PasswordEncoder} to use
	 */
	@SuppressWarnings("deprecation")
	public static PasswordEncoder createDelegatingPasswordEncoder() {
		String encodingId = "bcrypt";
		Map<String, PasswordEncoder> encoders = new HashMap<>();
		encoders.put(encodingId, new BCryptPasswordEncoder());
		encoders.put("ldap", new org.springframework.security.crypto.password.LdapShaPasswordEncoder());
		encoders.put("MD4", new org.springframework.security.crypto.password.Md4PasswordEncoder());
		encoders.put("MD5", new org.springframework.security.crypto.password.MessageDigestPasswordEncoder("MD5"));
		encoders.put("noop", org.springframework.security.crypto.password.NoOpPasswordEncoder.getInstance());
		encoders.put("pbkdf2", new Pbkdf2PasswordEncoder());
		encoders.put("scrypt", new SCryptPasswordEncoder());
		encoders.put("SHA-1", new org.springframework.security.crypto.password.MessageDigestPasswordEncoder("SHA-1"));
		encoders.put("SHA-256", new org.springframework.security.crypto.password.MessageDigestPasswordEncoder("SHA-256"));
		encoders.put("sha256", new org.springframework.security.crypto.password.StandardPasswordEncoder());

		return new DelegatingPasswordEncoder(encodingId, encoders);
	}

	private PasswordEncoderFactories() {}
}