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@@ -0,0 +1,194 @@
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+package com.sky.ioc.tool;
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+
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+import org.slf4j.Logger;
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+import org.slf4j.LoggerFactory;
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+
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+import javax.crypto.SecretKey;
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+import javax.crypto.SecretKeyFactory;
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+import javax.crypto.spec.PBEKeySpec;
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+import java.math.BigInteger;
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+import java.nio.charset.Charset;
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+import java.security.NoSuchAlgorithmException;
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+import java.security.spec.InvalidKeySpecException;
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+import java.security.spec.KeySpec;
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+import java.util.Random;
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+
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+/**
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+ * PBKDF2_SHA256加密验证算法
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+ */
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+public class Pbkdf2Sha256Digest {
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+
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+ private static final Logger logger = LoggerFactory.getLogger(Pbkdf2Sha256Digest.class);
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+
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+ /**
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+ * 盐的长度
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+ */
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+ private static final int SALT_BYTE_SIZE = 16;
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+
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+ /**
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+ * 生成密文的长度(例:64 * 4,密文长度为64)
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+ */
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+ private static final int HASH_BIT_SIZE = 64 * 4;
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+
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+ /**
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+ * 迭代次数(默认迭代次数为 2000)
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+ */
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+ private static final Integer DEFAULT_ITERATIONS = 260000;
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+
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+ /**
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+ * 算法名称
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+ */
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+ private static final String algorithm = "pbkdf2:sha256";
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+
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+ /**
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+ * 获取密文
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+ * @param password 密码明文
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+ * @param salt 加盐
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+ * @param iterations 迭代次数
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+ * @return
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+ */
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+ private static String getEncodedHash(String password, String salt, int iterations) {
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+ SecretKeyFactory keyFactory = null;
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+ try {
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+ keyFactory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");
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+ } catch (NoSuchAlgorithmException e) {
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+ logger.error("Could NOT retrieve PBKDF2WithHmacSHA256 algorithm", e);
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+ }
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+ KeySpec keySpec = new PBEKeySpec(password.toCharArray(), salt.getBytes(Charset.forName("UTF-8")), iterations, HASH_BIT_SIZE);
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+ SecretKey secret = null;
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+ try {
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+ secret = keyFactory.generateSecret(keySpec);
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+ } catch (InvalidKeySpecException e) {
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+ logger.error("Could NOT generate secret key", e);
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+ }
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+
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+ //使用Base64进行转码密文
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+ // byte[] rawHash = secret.getEncoded();
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+ // byte[] hashBase64 = Base64.getEncoder().encode(rawHash);
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+ // return new String(hashBase64);
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+
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+ //使用十六进制密文
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+ return toHex(secret.getEncoded());
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+ }
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+
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+ /**
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+ * 十六进制字符串转二进制字符串
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+ * @param hex 十六进制字符串
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+ * @return
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+ */
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+ private static byte[] fromHex(String hex) {
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+ byte[] binary = new byte[hex.length() / 2];
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+ for (int i = 0; i < binary.length; i++) {
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+ binary[i] = (byte) Integer.parseInt(hex.substring(2 * i, 2 * i + 2), 16);
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+ }
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+ return binary;
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+ }
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+
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+ /**
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+ * 二进制字符串转十六进制字符串
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+ * @param array 二进制数组
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+ * @return
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+ */
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+ private static String toHex(byte[] array) {
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+ BigInteger bi = new BigInteger(1, array);
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+ String hex = bi.toString(16);
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+ int paddingLength = (array.length * 2) - hex.length();
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+ if (paddingLength > 0) {
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+ return String.format("%0" + paddingLength + "d", 0) + hex;
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+ } else {
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+ return hex;
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+ }
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+ }
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+
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+ /**
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+ * 密文加盐 (获取‘SALT_BYTE_SIZE’长度的盐值)
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+ * @return
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+ */
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+ private static String getsalt() {
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+ //盐值使用ASCII表的数字加大小写字母组成
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+ int length = SALT_BYTE_SIZE;
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+ Random rand = new Random();
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+ char[] rs = new char[length];
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+ for (int i = 0; i < length; i++) {
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+ int t = rand.nextInt(3);
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+ if (t == 0) {
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+ rs[i] = (char) (rand.nextInt(10) + 48);
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+ } else if (t == 1) {
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+ rs[i] = (char) (rand.nextInt(26) + 65);
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+ } else {
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+ rs[i] = (char) (rand.nextInt(26) + 97);
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+ }
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+ }
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+ return new String(rs);
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+ }
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+
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+ /**
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+ * 获取密文
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+ * 默认迭代次数:2000
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+ * @param password 明文密码
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+ * @return
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+ */
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+ public static String encode(String password) {
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+ return encode(password, getsalt());
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+ }
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+
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+ /**
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+ * 获取密文
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+ * @param password 明文密码
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+ * @param iterations 迭代次数
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+ * @return
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+ */
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+ private static String encode(String password, int iterations) {
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+ return encode(password, getsalt(), iterations);
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+ }
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+
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+ /**
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+ * 获取密文
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+ * 默认迭代次数:2000
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+ * @param password 明文密码
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+ * @param salt 盐值
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+ * @return
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+ */
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+ private static String encode(String password, String salt) {
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+ return encode(password, salt, DEFAULT_ITERATIONS);
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+ }
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+
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+ /**
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+ * 最终返回的整串密文
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+ *
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+ * 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
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+ * 不需要的直接用getEncodedHash方法返回的密文
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+ *
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+ * @param password 密码明文
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+ * @param salt 加盐
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+ * @param iterations 迭代次数
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+ * @return
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+ */
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+ private static String encode(String password, String salt, int iterations) {
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+ // returns hashed password, along with algorithm, number of iterations and salt
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+ String hash = getEncodedHash(password, salt, iterations);
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+ return String.format("%s:%d$%s$%s", algorithm, iterations, salt, hash);
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+ }
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+
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+ /**
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+ * 验证密码
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+ * @param password 明文
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+ * @param hashedPassword 密文
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+ * @return
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+ */
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+ public static boolean verification(String password, String hashedPassword) {
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+ //hashedPassword = 算法名称+迭代次数+盐值+密文;
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+ String[] parts = hashedPassword.split("\\$");
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+ if (parts.length != 3) {
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+ return false;
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+ }
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+ String[] params = parts[0].split(":");
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+ //解析得到迭代次数和盐值进行盐值
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+ Integer iterations = Integer.parseInt(params[2]);
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+ String salt = parts[1];
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+ String hash = encode(password, salt, iterations);
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+ return hash.equals(hashedPassword);
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+ }
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+
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+}
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+
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