本人PHP一枚,最近对接JAVA,在使用3DES加密算法时发现加密的结果对不上,所以来请教一下。
相关代码
package com.test.utils;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import java.security.SecureRandom;
import java.security.spec.KeySpec;
/**
* Des3工具类
*/
public class Des3Utils {
/**
* @Description: DES3 解密
* @param key
* @param src
* @return String
*/
public static String decryptEde(String key, String src) {
String plainText = null;
try {
byte[] keyBytes = new byte[24];
asciiToBcdBytes(key, keyBytes, Math.min(32, key.length()) / 2);
for (int i = 0; i < 8; ++i)
keyBytes[16 + i] = keyBytes[i];
// 从原始密匙数据创建一个DESKeySpec对象
KeySpec dks = new DESedeKeySpec(keyBytes);
// 创建一个密匙工厂,然后用它把DESKeySpec对象转换成
// 一个SecretKey对象
SecretKey secKey = SecretKeyFactory.getInstance("DESede").generateSecret(dks);
// Cipher对象实际完成解密操作
Cipher cipher = Cipher.getInstance("DESede/ECB/NoPadding");
// DES算法要求有一个可信任的随机数源
SecureRandom sr = new SecureRandom();
// 用密匙初始化Cipher对象
cipher.init(Cipher.DECRYPT_MODE, secKey, sr);
int count = (src.length() + 1) / 2;
byte[] inputBytes = new byte[count];
asciiToBcdBytes(src, inputBytes, count);
// 正式执行解密操作
byte[] decryptBytes = cipher.doFinal(inputBytes);
int olen = decryptBytes.length - 1;
for (; decryptBytes[olen] == 0 && olen >= 0; --olen) {
}
plainText = new String(decryptBytes, 0, olen + 1);
} catch (Exception e) {
e.printStackTrace();
}
return plainText;
}
private static void asciiToBcdBytes(String str, byte[] hex, int count) {
byte[] inputBytes = str.getBytes();
for (int i = 0, j = 0; j < inputBytes.length && i < count; ++i) {
byte v = inputBytes[j];
++j;
if (v <= 0x39){
hex[i] = (byte) (v - 0x30);
} else {
hex[i] = (byte) (v - 0x41 + 10);
}
hex[i] <<= 4;
if (j >= inputBytes.length) {
break;
}
v = inputBytes[j];
++j;
if (v <= 0x39) {
hex[i] += (byte) (v - 0x30);
} else {
hex[i] += (byte) (v - 0x41 + 10);
}
}
}
/**
* @Description: DES3 加密
* @param key
* @param src
* @return String
*/
public static String encryptEde(String key, String src) {
String plainText = null;
try {
byte[] keyBytes = new byte[24];
asciiToBcdBytes(key, keyBytes, Math.min(32, key.length()) / 2);
for (int i = 0; i < 8; ++i)
keyBytes[16 + i] = keyBytes[i];
// 从原始密匙数据创建一个DESKeySpec对象
KeySpec dks = new DESedeKeySpec(keyBytes);
// 创建一个密匙工厂,然后用它把DESKeySpec对象转换成
// 一个SecretKey对象
SecretKey secKey = SecretKeyFactory.getInstance("DESede").generateSecret(dks);
// Cipher对象实际完成解密操作
Cipher cipher = Cipher.getInstance("DESede/ECB/NoPadding");
// DES算法要求有一个可信任的随机数源
SecureRandom sr = new SecureRandom();
// 用密匙初始化Cipher对象
cipher.init(Cipher.ENCRYPT_MODE, secKey, sr);
byte[] srcBytes = src.getBytes("UTF-8");
int srcLen = srcBytes.length;
int encLen = ((srcLen % 8) == 0) ? srcLen : ((srcLen / 8 + 1) * 8);
byte[] encBytes = new byte[encLen];
System.arraycopy(srcBytes, 0, encBytes, 0, srcLen);
// 正式执行解密操作
byte[] encryptBytes = cipher.doFinal(encBytes);
plainText = bcdBytesToAscii(encryptBytes, encLen);
} catch (Exception e) {
e.printStackTrace();
}
return plainText;
}
private static String bcdBytesToAscii(byte[] hex, int count) {
byte[] ascii = new byte[2 * count];
int t;
for (int i = 0; i < count; i++) {
t = hex[i] & 0xf0;
t = t >> 4;
if (t <= 9)
t += '0';
else if (t >= 10 && t <= 15)
t += 'A' - 10;
else
t = '0';
ascii[2 * i] = (byte) t;
t = hex[i] & 0x0f;
if (t <= 9)
t += '0';
else if (t >= 10 && t <= 15)
t += 'A' - 10;
else
t = '0';
ascii[2 * i + 1] = (byte) t;
}
return (new String(ascii));
}
}