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通过Java重写flask
项目中werkzeug 库的enerate_password_hash
, check_password_hash
两个函数来实现加密密码和验证密码。
备注:代码来源网上,亲测可用,进仅供参考学习。
package com.zju.manager_svr.util; 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; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.PBEKeySpec; import lombok.extern.slf4j.Slf4j; /** * pbkdf2_sha256 from: * modify from https://blog.csdn.net/qq_25112523/article/details/84308134 */ @Slf4j public class HashUtil { /** * 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 260000) */ private static final Integer DEFAULT_ITERATIONS = 260000; /** * 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) { log.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) { log.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:260000 * * @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:260000 * * @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 != 3) { return false; } String[] parts2 = parts[0].split(":"); if (parts2.length != 3) { return false; } // 解析得到迭代次数和盐值进行盐值 Integer iterations = Integer.parseInt(parts2[2]); String salt = parts[1]; String hash = encode(password, salt, iterations); return hash.equals(hashedPassword); } }
注意:加密后的密码输出是十六进制还是base64。
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