package com.zy.nc.util;
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import java.nio.charset.StandardCharsets;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.security.SecureRandom;
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public class SHA256Util {
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public static String getSHA256(String str, String key) {
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//����
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byte[] salt = new byte[16];
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try {
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SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
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random.setSeed(key.getBytes());
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random.nextBytes(salt);
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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}
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String salt_string = Base64Util.encryptBASE64(salt);
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System.out.println("salt_String::" + salt_string);
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return getSHA256(str + salt_string.replaceAll("\r|\n", ""));
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}
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private static String getSHA256(String str) {
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MessageDigest messageDigest;
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String encodestr = "";
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try {
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messageDigest = MessageDigest.getInstance("SHA-256");
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messageDigest.update(str.getBytes(StandardCharsets.UTF_8));
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encodestr = byte2Hex(messageDigest.digest());
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} catch (NoSuchAlgorithmException e) {
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throw new RuntimeException(e);
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}
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return encodestr;
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}
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private static String byte2Hex(byte[] bytes) {
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StringBuffer stringBuffer = new StringBuffer();
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String temp = null;
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for (int i = 0; i < bytes.length; i++) {
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temp = Integer.toHexString(bytes[i] & 0xFF);
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if (temp.length() == 1) {
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// 1得到�?��的进行补0操作
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stringBuffer.append("0");
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}
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stringBuffer.append(temp);
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}
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return stringBuffer.toString();
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}
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}
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