pbkdf2&sha256加密验证算法 | 密码加密

喜欢ヅ旅行 2022-04-15 03:08 585阅读 1赞

# pbkdf2\_sha256加密验证算法 #

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最近在改由Java取代Python验证用户登录的加密方式。Python通过pbkdf2算法和sha256算法对用户的密码进行加密，由于业务需要，转由Java方式实现。弄了许久也是终于完成了Python和Java的无缝对接。

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###### 主要使用"getEncodedHash"方法和"encode"方法，具体的加密方式根据自己的需求而定，Python代码就不贴了，这里主要是给大家一个参考思路 ######

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### Java代码： ###

###### 具体参考 getEncodedHash 方法，因为返回有很多格式，这里列举了Base64和64位的十六进制 ######

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#### 下面贴代码： Pbkdf2Sha256 工具类 ####

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import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    import javax.crypto.SecretKey;
    import javax.crypto.SecretKeyFactory;
    import javax.crypto.spec.PBEKeySpec;
    import java.math.BigInteger;
    import java.nio.charset.Charset;
    import java.security.NoSuchAlgorithmException;
    import java.security.spec.InvalidKeySpecException;
    import java.security.spec.KeySpec;
    import java.util.Random;
    
    /** * PBKDF2_SHA256加密验证算法 * * @author 慌途L */
    
    public class Pbkdf2Sha256 { 
    
        private static final Logger logger = LoggerFactory.getLogger(Pbkdf2Sha256.class);
    
        /** * 盐的长度 */
        public static final int SALT_BYTE_SIZE = 16;
    
        /** * 生成密文的长度(例：64 * 4，密文长度为64) */
        public static final int HASH_BIT_SIZE = 64 * 4;
    
        /** * 迭代次数(默认迭代次数为 2000) */
        private static final Integer DEFAULT_ITERATIONS = 2000;
    
        /** * 算法名称 */
        private static final String algorithm = "PBKDF2&SHA256";
    
        /** * 获取密文 * @param password 密码明文 * @param salt 加盐 * @param iterations 迭代次数 * @return */
        public static String getEncodedHash(String password, String salt, int iterations) { 
            // Returns only the last part of whole encoded password
            SecretKeyFactory keyFactory = null;
            try { 
                keyFactory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");
            } catch (NoSuchAlgorithmException e) { 
                logger.error("Could NOT retrieve PBKDF2WithHmacSHA256 algorithm", e);
            }
            KeySpec keySpec = new PBEKeySpec(password.toCharArray(), salt.getBytes(Charset.forName("UTF-8")), iterations, HASH_BIT_SIZE);
            SecretKey secret = null;
            try { 
                secret = keyFactory.generateSecret(keySpec);
            } catch (InvalidKeySpecException e) { 
                logger.error("Could NOT generate secret key", e);
            }
    
            //使用Base64进行转码密文
    // byte[] rawHash = secret.getEncoded();
    // byte[] hashBase64 = Base64.getEncoder().encode(rawHash);
    // return new String(hashBase64);
    
            //使用十六进制密文
            return toHex(secret.getEncoded());
        }
    
        /** * 十六进制字符串转二进制字符串 * @param hex 十六进制字符串 * @return */
        private static byte[] fromHex(String hex) { 
            byte[] binary = new byte[hex.length() / 2];
            for (int i = 0; i < binary.length; i++) { 
                binary[i] = (byte) Integer.parseInt(hex.substring(2 * i, 2 * i + 2), 16);
            }
            return binary;
        }
    
        /** * 二进制字符串转十六进制字符串 * @param array 二进制数组 * @return */
        private static String toHex(byte[] array) { 
            BigInteger bi = new BigInteger(1, array);
            String hex = bi.toString(16);
            int paddingLength = (array.length * 2) - hex.length();
            if (paddingLength > 0)
                return String.format("%0" + paddingLength + "d", 0) + hex;
            else
                return hex;
        }
    
        /** * 密文加盐 (获取‘SALT_BYTE_SIZE’长度的盐值) * @return */
        public static String getsalt() { 
            //盐值使用ASCII表的数字加大小写字母组成
            int length = SALT_BYTE_SIZE;
            Random rand = new Random();
            char[] rs = new char[length];
            for (int i = 0; i < length; i++) { 
                int t = rand.nextInt(3);
                if (t == 0) { 
                    rs[i] = (char) (rand.nextInt(10) + 48);
                } else if (t == 1) { 
                    rs[i] = (char) (rand.nextInt(26) + 65);
                } else { 
                    rs[i] = (char) (rand.nextInt(26) + 97);
                }
            }
            return new String(rs);
        }
    
        /** * 获取密文 * 默认迭代次数：2000 * @param password 明文密码 * @return */
        public static String encode(String password) { 
            return encode(password, getsalt());
        }
    
        /** * 获取密文 * @param password 明文密码 * @param iterations 迭代次数 * @return */
        public static String encode(String password, int iterations) { 
            return encode(password, getsalt(), iterations);
        }
    
        /** * 获取密文 * 默认迭代次数：2000 * @param password 明文密码 * @param salt 盐值 * @return */
        public static String encode(String password, String salt) { 
            return encode(password, salt, DEFAULT_ITERATIONS);
        }
    
        /** * 最终返回的整串密文 * * 注：此方法返回密文字符串组成：算法名称+迭代次数+盐值+密文 * 不需要的直接用getEncodedHash方法返回的密文 * * @param password 密码明文 * @param salt 加盐 * @param iterations 迭代次数 * @return */
        public static String encode(String password, String salt, int iterations) { 
            // returns hashed password, along with algorithm, number of iterations and salt
            String hash = getEncodedHash(password, salt, iterations);
            return String.format("%s$%d$%s$%s", algorithm, iterations, salt, hash);
        }
    
        /** * 验证密码 * @param password 明文 * @param hashedPassword 密文 * @return */
        public static boolean verification(String password, String hashedPassword) { 
            //hashedPassword = 算法名称+迭代次数+盐值+密文;
            String[] parts = hashedPassword.split("\\$");
            if (parts.length != 4) { 
                return false;
            }
            //解析得到迭代次数和盐值进行盐值
            Integer iterations = Integer.parseInt(parts[1]);
            String salt = parts[2];
            String hash = encode(password, salt, iterations);
            return hash.equals(hashedPassword);
        }
    }

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#### Test测试类：通过密码和密文，验证Python密文是否和Java的一样 ####

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package com.huangtu.test;
    
    import java.io.IOException;
    
    public class TestCode { 
    
        public static void main(String[] args) throws IOException { 
    
            //获取密文（密码加盐）
            String salt = Pbkdf2Sha256.encode("123456");
            System.out.println("salt===" + salt);
            boolean verification = Pbkdf2Sha256.verification("123456", salt);
            System.out.println(verification);
    
    
            /** * Python生成的密码和密文 * admin123456 * PBKDF2&SHA256$2000$SzNgPdzz$50f22e207abec8e837bce97642a46f965f19d992217d7df9be496700b286345d * PBKDF2&SHA256$2000$VzmO4yOZ$71891148cfbdd9103aaa511d20dc52431c8947ce4a00d89708231ec76053f6f3 * PBKDF2&SHA256$2000$3xuRb8AR$6bff0310fd35c88572633b00d36e9039fef3e68c6e37b14204958946e8738e93 */
            String oldPassword7 = "PBKDF2&SHA256$2000$SzNgPdzz$50f22e207abec8e837bce97642a46f965f19d992217d7df9be496700b286345d";
            String oldPassword8 = "PBKDF2&SHA256$2000$VzmO4yOZ$71891148cfbdd9103aaa511d20dc52431c8947ce4a00d89708231ec76053f6f3";
            String oldPassword9 = "PBKDF2&SHA256$2000$3xuRb8AR$6bff0310fd35c88572633b00d36e9039fef3e68c6e37b14204958946e8738e93";
            boolean verification7 = Pbkdf2Sha256.verification("admin123456", oldPassword7);
            boolean verification8 = Pbkdf2Sha256.verification("admin123456", oldPassword8);
            boolean verification9 = Pbkdf2Sha256.verification("admin123456", oldPassword9);
            System.out.println(verification7);
            System.out.println(verification8);
            System.out.println(verification9);
        }
    }

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通过测试，用户在python注册加密密码后得到密文，即密码，在java以相同的方式去加密，然后对两个密文进行对比，相同则是密码一致，否则不一致

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#### 最后，希望对大家有所帮助！ ####

![在这里插入图片描述][2018112122224860.gif]

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##### 参考网址 #####

*  [https://howtodoinjava.com/security/how-to-generate-secure-password-hash-md5-sha-pbkdf2-bcrypt-examples/][https_howtodoinjava.com_security_how-to-generate-secure-password-hash-md5-sha-pbkdf2-bcrypt-examples]
 *  [https://blog.csdn.net/u014375869/article/details/46773995][https_blog.csdn.net_u014375869_article_details_46773995]
 *  [https://my.oschina.net/haopeng/blog/2873022][https_my.oschina.net_haopeng_blog_2873022]

[2018112122224860.gif]: /images/20220415/78ade09f02114a8a9d5dac29bc456492.png
[https_howtodoinjava.com_security_how-to-generate-secure-password-hash-md5-sha-pbkdf2-bcrypt-examples]: https://howtodoinjava.com/security/how-to-generate-secure-password-hash-md5-sha-pbkdf2-bcrypt-examples/
[https_blog.csdn.net_u014375869_article_details_46773995]: https://blog.csdn.net/u014375869/article/details/46773995
[https_my.oschina.net_haopeng_blog_2873022]: https://my.oschina.net/haopeng/blog/2873022