Java加密解密等操作的工具类

package com.unionpay.acp.sdk;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Signature;
import javax.crypto.Cipher;
import org.apache.commons.codec.binary.Base64;
import org.bouncycastle.crypto.digests.SM3Digest;
/**

• @Author 2285841929
• @ClassName SecureUtil
• @Description acpsdk安全算法工具类
• @date 2017-7-22 下午4:08:32

• */
  public class SecureUtil {
  /**

  • 算法常量： SHA1
    */
    private static final String ALGORITHM_SHA1 = "SHA-1";
    /**
  • 算法常量： SHA256
    */
    private static final String ALGORITHM_SHA256 = "SHA-256";
    /**
  • 算法常量：SHA1withRSA
    */
    private static final String BC_PROV_ALGORITHM_SHA1RSA = "SHA1withRSA";
    /**
  • 算法常量：SHA256withRSA
    */
    private static final String BC_PROV_ALGORITHM_SHA256RSA = "SHA256withRSA";

  /**

  • sm3计算后进行16进制转换
  • @param data
  • 待计算的数据
  • @param encoding
  • 编码
  • @return 计算结果
    */
    public static String sm3X16Str(String data, String encoding) {
    byte[] bytes = sm3(data, encoding);
    StringBuilder sm3StrBuff = new StringBuilder();
    for (int i = 0; i < bytes.length; i++) {
    if (Integer.toHexString(0xFF & bytes[i]).length() == 1) {
    sm3StrBuff.append("0").append(
    Integer.toHexString(0xFF & bytes[i]));
    } else {
    sm3StrBuff.append(Integer.toHexString(0xFF & bytes[i]));
    }
    }
    return sm3StrBuff.toString();
    }

  /**

  • sha1计算后进行16进制转换
  • @param data
  • 待计算的数据
  • @param encoding
  • 编码
  • @return 计算结果
    */
    public static byte[] sha1X16(String data, String encoding) {
    byte[] bytes = sha1(data, encoding);
    StringBuilder sha1StrBuff = new StringBuilder();
    for (int i = 0; i < bytes.length; i++) {
    if (Integer.toHexString(0xFF & bytes[i]).length() == 1) {
    sha1StrBuff.append("0").append(
    Integer.toHexString(0xFF & bytes[i]));
    } else {
    sha1StrBuff.append(Integer.toHexString(0xFF & bytes[i]));
    }
    }
    try {
    return sha1StrBuff.toString().getBytes(encoding);
    } catch (UnsupportedEncodingException e) {
    LogUtil.writeErrorLog(e.getMessage(), e);
    return null;
    }
    }

  /**

  • sha256计算后进行16进制转换
  • @param data
  • 待计算的数据
  • @param encoding
  • 编码
  • @return 计算结果
    */
    public static String sha256X16Str(String data, String encoding) {
    byte[] bytes = sha256(data, encoding);
    StringBuilder sha256StrBuff = new StringBuilder();
    for (int i = 0; i < bytes.length; i++) {
    if (Integer.toHexString(0xFF & bytes[i]).length() == 1) {
    sha256StrBuff.append("0").append(
    Integer.toHexString(0xFF & bytes[i]));
    } else {
    sha256StrBuff.append(Integer.toHexString(0xFF & bytes[i]));
    }
    }
    return sha256StrBuff.toString();
    }

  /**

  • sha256计算后进行16进制转换
  • @param data
  • 待计算的数据
  • @param encoding
  • 编码
  • @return 计算结果
    */
    public static byte[] sha256X16(String data, String encoding) {
    byte[] bytes = sha256(data, encoding);
    StringBuilder sha256StrBuff = new StringBuilder();
    for (int i = 0; i < bytes.length; i++) {
    if (Integer.toHexString(0xFF & bytes[i]).length() == 1) {
    sha256StrBuff.append("0").append(
    Integer.toHexString(0xFF & bytes[i]));
    } else {
    sha256StrBuff.append(Integer.toHexString(0xFF & bytes[i]));
    }
    }
    try {
    return sha256StrBuff.toString().getBytes(encoding);
    } catch (UnsupportedEncodingException e) {
    LogUtil.writeErrorLog(e.getMessage(), e);
    return null;
    }
    }

  /**

  • sha1计算.
  • @param datas
  • 待计算的数据
  • @return 计算结果
    */
    private static byte[] sha1(byte[] data) {
    MessageDigest md = null;
    try {
    md = MessageDigest.getInstance(ALGORITHM_SHA1);
    md.reset();
    md.update(data);
    return md.digest();
    } catch (Exception e) {
    LogUtil.writeErrorLog("SHA1计算失败", e);
    return null;
    }
    }

  /**

  • sha256计算.
  • @param datas
  • 待计算的数据
  • @return 计算结果
    */
    private static byte[] sha256(byte[] data) {
    MessageDigest md = null;
    try {
    md = MessageDigest.getInstance(ALGORITHM_SHA256);
    md.reset();
    md.update(data);
    return md.digest();
    } catch (Exception e) {
    LogUtil.writeErrorLog("SHA256计算失败", e);
    return null;
    }
    }

  /**

  • SM3计算.
  • @param datas
  • 待计算的数据
  • @return 计算结果
    */
    private static byte[] sm3(byte[] data) {
    SM3Digest sm3 = new SM3Digest();
    sm3.update(data, 0, data.length);
    byte[] result = new byte[sm3.getDigestSize()];
    sm3.doFinal(result, 0);
    return result;
    }

  /**

  • sha1计算
  • @param datas
  • 待计算的数据
  • @param encoding
  • 字符集编码
  • @return
    */
    private static byte[] sha1(String datas, String encoding) {
    try {
    return sha1(datas.getBytes(encoding));
    } catch (UnsupportedEncodingException e) {
    LogUtil.writeErrorLog("SHA1计算失败", e);
    return null;
    }
    }

  /**

  • sha256计算
  • @param datas
  • 待计算的数据
  • @param encoding
  • 字符集编码
  • @return
    */
    private static byte[] sha256(String datas, String encoding) {
    try {
    return sha256(datas.getBytes(encoding));
    } catch (UnsupportedEncodingException e) {
    LogUtil.writeErrorLog("SHA256计算失败", e);
    return null;
    }
    }

  /**

  • sm3计算
  • @param datas
  • 待计算的数据
  • @param encoding
  • 字符集编码
  • @return
    */
    private static byte[] sm3(String datas, String encoding) {
    try {
    return sm3(datas.getBytes(encoding));
    } catch (UnsupportedEncodingException e) {
    LogUtil.writeErrorLog("SM3计算失败", e);
    return null;
    }
    }

  /**

  • @param privateKey
  • @param data
  • @return
  • @throws Exception
    */
    public static byte[] signBySoft(PrivateKey privateKey, byte[] data)
    throws Exception {
    byte[] result = null;
    Signature st = Signature.getInstance(BC_PROV_ALGORITHM_SHA1RSA, "BC");
    st.initSign(privateKey);
    st.update(data);
    result = st.sign();
    return result;
    }

  /**

  • @param privateKey
  • @param data
  • @return
  • @throws Exception
    */
    public static byte[] signBySoft256(PrivateKey privateKey, byte[] data)
    throws Exception {
    byte[] result = null;
    Signature st = Signature.getInstance(BC_PROV_ALGORITHM_SHA256RSA, "BC");
    st.initSign(privateKey);
    st.update(data);
    result = st.sign();
    return result;
    }

  public static boolean validateSignBySoft(PublicKey publicKey,
  byte[] signData, byte[] srcData) throws Exception {
  Signature st = Signature.getInstance(BC_PROV_ALGORITHM_SHA1RSA, "BC");
  st.initVerify(publicKey);
  st.update(srcData);
  return st.verify(signData);
  }

  public static boolean validateSignBySoft256(PublicKey publicKey,
  byte[] signData, byte[] srcData) throws Exception {
  Signature st = Signature.getInstance(BC_PROV_ALGORITHM_SHA256RSA, "BC");
  st.initVerify(publicKey);
  st.update(srcData);
  return st.verify(signData);
  }

  /**

  • 对数据通过公钥进行加密，并进行base64计算
  • @param dataString
  • 待处理数据
  • @param encoding
  • 字符编码
  • @param key
  • 公钥
  • @return
    */
    public static String encryptData(String dataString, String encoding,
    PublicKey key) {
    / 使用公钥对密码加密 /
    byte[] data = null;
    try {
    data = encryptData(key, dataString.getBytes(encoding));
    return new String(SecureUtil.base64Encode(data), encoding);
    } catch (Exception e) {
    LogUtil.writeErrorLog(e.getMessage(), e);
    return "";
    }
    }

  /**

  • 对数据通过公钥进行加密，并进行base64计算
  • @param dataString
  • 待处理数据
  • @param encoding
  • 字符编码
  • @param key
  • 公钥
  • @return
    */
    public static String encryptPin(String accNo, String pin, String encoding,
    PublicKey key) {
    / 使用公钥对密码加密 /
    byte[] data = null;
    try {
    data = pin2PinBlockWithCardNO(pin, accNo);
    data = encryptData(key, data);
    return new String(SecureUtil.base64Encode(data), encoding);
    } catch (Exception e) {
    LogUtil.writeErrorLog(e.getMessage(), e);
    return "";
    }
    }

  /**

  • 通过私钥解密
  • @param dataString
  • base64过的数据
  • @param encoding
  • 编码
  • @param key
  • 私钥
  • @return 解密后的数据
    */
    public static String decryptData(String dataString, String encoding,
    PrivateKey key) {
    byte[] data = null;
    try {
    data = SecureUtil.base64Decode(dataString.getBytes(encoding));
    data = decryptData(key, data);
    return new String(data, encoding);
    } catch (Exception e) {
    LogUtil.writeErrorLog(e.getMessage(), e);
    return "";
    }
    }

  /**

  • BASE64解码
  • @param inputByte
  • 待解码数据
  • @return 解码后的数据
  • @throws IOException
    */
    public static byte[] base64Decode(byte[] inputByte) throws IOException {
    return Base64.decodeBase64(inputByte);
    }

  /**

  • BASE64编码
  • @param inputByte
  • 待编码数据
  • @return 解码后的数据
  • @throws IOException
    */
    public static byte[] base64Encode(byte[] inputByte) throws IOException {
    return Base64.encodeBase64(inputByte);
    }

  /**

  • 加密除pin之外的其他信息
  • @param publicKey
  • @param plainData
  • @return
  • @throws Exception
    */
    private static byte[] encryptData(PublicKey publicKey, byte[] plainData)
    throws Exception {
    try {
    Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding","BC");
    cipher.init(Cipher.ENCRYPT_MODE, publicKey);
    return cipher.doFinal(plainData);
    } catch (Exception e) {
    throw new Exception(e.getMessage());
    }
    }

  /**

  • @param privateKey
  • @param cryptPin
  • @return
  • @throws Exception
    */
    private static byte[] decryptData(PrivateKey privateKey, byte[] data)
    throws Exception {
    try {
    Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding","BC");
    cipher.init(Cipher.DECRYPT_MODE, privateKey);
    return cipher.doFinal(data);
    } catch (Exception e) {
    LogUtil.writeErrorLog("解密失败", e);
    }
    return null;
    }

  /**

  • @param aPin
  • @return
    */
    private static byte[] pin2PinBlock(String aPin) {
    int tTemp = 1;
    int tPinLen = aPin.length();

  byte[] tByte = new byte[8];
  try {

  /***

  • if (tPinLen > 9) { tByte[0] = (byte) Integer.parseInt(new
  • Integer(tPinLen) .toString(), 16); } else { tByte[0] = (byte)
  • Integer.parseInt(new Integer(tPinLen) .toString(), 10); }

  **/
  // tByte[0] = (byte) Integer.parseInt(new Integer(tPinLen).toString(),
  // 10);
  tByte[0] = (byte) Integer.parseInt(Integer.toString(tPinLen), 10);
  if (tPinLen % 2 == 0) {
  for (int i = 0; i < tPinLen;) {
  String a = aPin.substring(i, i + 2);
  tByte[tTemp] = (byte) Integer.parseInt(a, 16);
  if (i == (tPinLen - 2)) {
  if (tTemp < 7) {
  for (int x = (tTemp + 1); x < 8; x

  ++) {
  tByte[x] = (byte) 0xff;
  }
  }
  }
  tTemp++;
  i = i + 2;
  }
  } else {
  for (int i = 0; i < tPinLen - 1;) {
  String a;
  a = aPin.substring(i, i + 2);
  tByte[tTemp] = (byte) Integer.parseInt(a, 16);
  if (i == (tPinLen - 3)) {
  String b = aPin.substring(tPinLen - 1) +

  "F";
  tByte[tTemp + 1] = (byte) Integer.parseInt

  (b, 16);
  if ((tTemp + 1) < 7) {
  for (int x = (tTemp + 2); x < 8; x

  ++) {
  tByte[x] = (byte) 0xff;
  }
  }
  }
  tTemp++;
  i = i + 2;
  }
  }
  } catch (Exception e) {
  }

  return tByte;
  }

  /**

  • @param aPan
  • @return
    */
    private static byte[] formatPan(String aPan) {
    int tPanLen = aPan.length();
    byte[] tByte = new byte[8];
    ;
    int temp = tPanLen - 13;
    try {
    tByte[0] = (byte) 0x00;
    tByte[1] = (byte) 0x00;
    for (int i = 2; i < 8; i++) {
    String a = aPan.substring(temp, temp + 2);
    tByte[i] = (byte) Integer.parseInt(a, 16);
    temp = temp + 2;
    }
    } catch (Exception e) {
    }
    return tByte;
    }

  /**

  • @param aPin
  • @param aCardNO
  • @return
    */
    private static byte[] pin2PinBlockWithCardNO(String aPin, String aCardNO) {
    byte[] tPinByte = pin2PinBlock(aPin);
    if (aCardNO.length() == 11) {
    aCardNO = "00" + aCardNO;
    } else if (aCardNO.length() == 12) {
    aCardNO = "0" + aCardNO;
    }
    byte[] tPanByte = formatPan(aCardNO);
    byte[] tByte = new byte[8];
    for (int i = 0; i < 8; i++) {
    tByte[i] = (byte) (tPinByte[i] ^ tPanByte[i]);
    }
    return tByte;
    }

  /**

  • luhn算法
  • @param number
  • @return
    /
    public static int genLuhn(String number) {
    number = number + "0";
    int s1 = 0, s2 = 0;
    String reverse = new StringBuffer(number).reverse().toString();
    for (int i = 0; i < reverse.length(); i++) {
    int digit = Character.digit(reverse.charAt(i), 10);
    if (i % 2 == 0) {// this is for odd digits, they are 1-indexed in //
    // the algorithm
    s1 += digit;
    } else {// add 2 digit for 0-4, add 2 digit - 9 for 5-9
    s2 += 2 digit;
    if (digit >= 5) {
    s2 -= 9;
    }
    }
    }
    int check = 10 - ((s1 + s2) % 10);
    if (check == 10)
    check = 0;
    return check;
    }
    }

来源：51CTO

作者：跌底

链接：https://blog.51cto.com/13545923/2053288