java之php、Android、JAVA、C# 3DES加密解密
异常如下
1.javax.crypto.BadPaddingException: Given final block not properly padded
1)要确认下是否加密和解密都是使用相同的填充算法(也就是说,是否都是使用PKCS5Padding)2)确认下你要解密的字节数组是否正确。
javax.crypto.IllegalBlockSizeException:
Input length must be multiple of 8 when decrypting with padded cipher
输入长度必须是8的倍数时,解密密文
一、java中简单的加密解密过程
package mai.util;
import java.security.Security;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
public class ThreeDES {
private static final String Algorithm = "DESede"; //定义 加密算法,可用 DES,DESede,Blowfish
//keybyte为加密密钥,长度为24字节
//src为被加密的数据缓冲区(源)
public static byte[] encryptMode(byte[] keybyte, byte[] src) {
try {
//生成密钥
SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);
//加密
Cipher c1 = Cipher.getInstance(Algorithm);
c1.init(Cipher.ENCRYPT_MODE, deskey);
return c1.doFinal(src);
} catch (java.security.NoSuchAlgorithmException e1) {
e1.printStackTrace();
} catch (javax.crypto.NoSuchPaddingException e2) {
e2.printStackTrace();
} catch (java.lang.Exception e3) {
e3.printStackTrace();
}
return null;
}
//keybyte为加密密钥,长度为24字节
//src为加密后的缓冲区
public static byte[] decryptMode(byte[] keybyte, byte[] src) {
try {
//生成密钥
SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);
//解密
Cipher c1 = Cipher.getInstance(Algorithm);
c1.init(Cipher.DECRYPT_MODE, deskey);
return c1.doFinal(src);
} catch (java.security.NoSuchAlgorithmException e1) {
e1.printStackTrace();
} catch (javax.crypto.NoSuchPaddingException e2) {
e2.printStackTrace();
} catch (java.lang.Exception e3) {
e3.printStackTrace();
}
return null;
}
//转换成十六进制字符串
public static String byte2hex(byte[] b) {
String hs="";
String stmp="";
for (int n=0;n<b.length;n++) {
stmp=(java.lang.Integer.toHexString(b[n] & 0XFF));
if (stmp.length()==1) hs=hs+"0"+stmp;
else hs=hs+stmp;
if (n<b.length-1) hs=hs+":";
}
return hs.toUpperCase();
}
public static void main(String[] args)
{
//添加新安全算法,如果用JCE就要把它添加进去
Security.addProvider(new com.sun.crypto.provider.SunJCE());
final byte[] keyBytes = {0x11, 0x22, 0x4F, 0x58, (byte)0x88, 0x10, 0x40, 0x38
, 0x28, 0x25, 0x79, 0x51, (byte)0xCB, (byte)0xDD, 0x55, 0x66
, 0x77, 0x29, 0x74, (byte)0x98, 0x30, 0x40, 0x36, (byte)0xE2}; //24字节的密钥
String szSrc = "This is a 3DES test. 测试";
System.out.println("加密前的字符串:" + szSrc);
byte[] encoded = encryptMode(keyBytes, szSrc.getBytes());
System.out.println("加密后的字符串:" + new String(encoded));
byte[] srcBytes = decryptMode(keyBytes, encoded);
System.out.println("解密后的字符串:" + (new String(srcBytes)));
}
}
http://www.cnblogs.com/mailingfeng/archive/2011/07/29/2120507.html
二、Android: JAVA和C# 3DES加密解密
这里的KEY采用Base64编码,便用分发,因为Java的Byte范围为-128至127,c#的Byte范围是0-255
核心是确定Mode和Padding,关于这两个的意思可以搜索3DES算法相关文章
一个是C#采用CBC
Mode,PKCS7 Padding,Java采用CBC Mode,PKCS5Padding Padding,
另一个是C#采用ECB
Mode,PKCS7 Padding,Java采用ECB Mode,PKCS5Padding
Padding,
Java的ECB模式不需要IV
对字符加密时,双方采用的都是UTF-8编码
下面是C#代码
/// DES3加密解密
///</summary>
publicclass Des3
{
#region CBC模式**
///<summary>
/// DES3 CBC模式加密
///</summary>
///<param name="key">密钥</param>
///<param name="iv">IV</param>
///<param name="data">明文的byte数组</param>
///<returns>密文的byte数组</returns>
publicstaticbyte[] Des3EncodeCBC( byte[] key, byte[] iv, byte[] data )
{
//复制于MSDN
try
{
// Create a MemoryStream.
MemoryStream mStream = new MemoryStream();
TripleDESCryptoServiceProvider tdsp = new TripleDESCryptoServiceProvider();
tdsp.Mode = CipherMode.CBC; //默认值
tdsp.Padding = PaddingMode.PKCS7; //默认值
// Create a CryptoStream using the MemoryStream
// and the passed key and initialization vector (IV).
CryptoStream cStream = new CryptoStream( mStream,
tdsp.CreateEncryptor( key, iv ),
CryptoStreamMode.Write );
// Write the byte array to the crypto stream and flush it.
cStream.Write( data, 0, data.Length );
cStream.FlushFinalBlock();
// Get an array of bytes from the
// MemoryStream that holds the
// encrypted data.
byte[] ret = mStream.ToArray();
// Close the streams.
cStream.Close();
mStream.Close();
// Return the encrypted buffer.
return ret;
}
catch ( CryptographicException e )
{
Console.WriteLine( "A Cryptographic error occurred: {0}", e.Message );
returnnull;
}
}
///<summary>
/// DES3 CBC模式解密
///</summary>
///<param name="key">密钥</param>
///<param name="iv">IV</param>
///<param name="data">密文的byte数组</param>
///<returns>明文的byte数组</returns>
publicstaticbyte[] Des3DecodeCBC( byte[] key, byte[] iv, byte[] data )
{
try
{
// Create a new MemoryStream using the passed
// array of encrypted data.
MemoryStream msDecrypt = new MemoryStream( data );
TripleDESCryptoServiceProvider tdsp = new TripleDESCryptoServiceProvider();
tdsp.Mode = CipherMode.CBC;
tdsp.Padding = PaddingMode.PKCS7;
// Create a CryptoStream using the MemoryStream
// and the passed key and initialization vector (IV).
CryptoStream csDecrypt = new CryptoStream( msDecrypt,
tdsp.CreateDecryptor( key, iv ),
CryptoStreamMode.Read );
// Create buffer to hold the decrypted data.
byte[] fromEncrypt = newbyte[data.Length];
// Read the decrypted data out of the crypto stream
// and place it into the temporary buffer.
csDecrypt.Read( fromEncrypt, 0, fromEncrypt.Length );
//Convert the buffer into a string and return it.
return fromEncrypt;
}
catch ( CryptographicException e )
{
Console.WriteLine( "A Cryptographic error occurred: {0}", e.Message );
returnnull;
}
}
#endregion
#region ECB模式
///<summary>
/// DES3 ECB模式加密
///</summary>
///<param name="key">密钥</param>
///<param name="iv">IV(当模式为ECB时,IV无用)</param>
///<param name="str">明文的byte数组</param>
///<returns>密文的byte数组</returns>
publicstaticbyte[] Des3EncodeECB( byte[] key, byte[] iv, byte[] data )
{
try
{
// Create a MemoryStream.
MemoryStream mStream = new MemoryStream();
TripleDESCryptoServiceProvider tdsp = new TripleDESCryptoServiceProvider();
tdsp.Mode = CipherMode.ECB;
tdsp.Padding = PaddingMode.PKCS7;
// Create a CryptoStream using the MemoryStream
// and the passed key and initialization vector (IV).
CryptoStream cStream = new CryptoStream( mStream,
tdsp.CreateEncryptor( key, iv ),
CryptoStreamMode.Write );
// Write the byte array to the crypto stream and flush it.
cStream.Write( data, 0, data.Length );
cStream.FlushFinalBlock();
// Get an array of bytes from the
// MemoryStream that holds the
// encrypted data.
byte[] ret = mStream.ToArray();
// Close the streams.
cStream.Close();
mStream.Close();
// Return the encrypted buffer.
return ret;
}
catch ( CryptographicException e )
{
Console.WriteLine( "A Cryptographic error occurred: {0}", e.Message );
returnnull;
}
}
///<summary>
/// DES3 ECB模式解密
///</summary>
///<param name="key">密钥</param>
///<param name="iv">IV(当模式为ECB时,IV无用)</param>
///<param name="str">密文的byte数组</param>
///<returns>明文的byte数组</returns>
publicstaticbyte[] Des3DecodeECB( byte[] key, byte[] iv, byte[] data )
{
try
{
// Create a new MemoryStream using the passed
// array of encrypted data.
MemoryStream msDecrypt = new MemoryStream( data );
TripleDESCryptoServiceProvider tdsp = new TripleDESCryptoServiceProvider();
tdsp.Mode = CipherMode.ECB;
tdsp.Padding = PaddingMode.PKCS7;
// Create a CryptoStream using the MemoryStream
// and the passed key and initialization vector (IV).
CryptoStream csDecrypt = new CryptoStream( msDecrypt,
tdsp.CreateDecryptor( key, iv ),
CryptoStreamMode.Read );
// Create buffer to hold the decrypted data.
byte[] fromEncrypt = newbyte[data.Length];
// Read the decrypted data out of the crypto stream
// and place it into the temporary buffer.
csDecrypt.Read( fromEncrypt, 0, fromEncrypt.Length );
//Convert the buffer into a string and return it.
return fromEncrypt;
}
catch ( CryptographicException e )
{
Console.WriteLine( "A Cryptographic error occurred: {0}", e.Message );
returnnull;
}
}
#endregion
///<summary>
/// 类测试
///</summary>
publicstaticvoid Test()
{
System.Text.Encoding utf8 = System.Text.Encoding.UTF8;
//key为abcdefghijklmnopqrstuvwx的Base64编码
byte[] key = Convert.FromBase64String( "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4" );
byte[] iv = newbyte[] { 1, 2, 3, 4, 5, 6, 7, 8 }; //当模式为ECB时,IV无用
byte[] data = utf8.GetBytes( "中国ABCabc123" );
System.Console.WriteLine( "ECB模式:" );
byte[] str1 = Des3.Des3EncodeECB( key, iv, data );
byte[] str2 = Des3.Des3DecodeECB( key, iv, str1 );
System.Console.WriteLine( Convert.ToBase64String( str1 ) );
System.Console.WriteLine( System.Text.Encoding.UTF8.GetString( str2 ) );
System.Console.WriteLine();
System.Console.WriteLine( "CBC模式:" );
byte[] str3 = Des3.Des3EncodeCBC( key, iv, data );
byte[] str4 = Des3.Des3DecodeCBC( key, iv, str3 );
System.Console.WriteLine( Convert.ToBase64String( str3 ) );
System.Console.WriteLine( utf8.GetString( str4 ) );
System.Console.WriteLine();
}
}
接着是Java代码
import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
publicclass Des3 {
publicstaticvoid main(String[] args) throws Exception {
byte[] key=new BASE64Decoder().decodeBuffer("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4");
byte[] keyiv = { 1, 2, 3, 4, 5, 6, 7, 8 };
byte[] data="中国ABCabc123".getBytes("UTF-8");
System.out.println("ECB加密解密");
byte[] str3 = des3EncodeECB(key,data );
byte[] str4 = ees3DecodeECB(key, str3);
System.out.println(new BASE64Encoder().encode(str3));
System.out.println(new String(str4, "UTF-8"));
System.out.println();
System.out.println("CBC加密解密");
byte[] str5 = des3EncodeCBC(key, keyiv, data);
byte[] str6 = des3DecodeCBC(key, keyiv, str5);
System.out.println(new BASE64Encoder().encode(str5));
System.out.println(new String(str6, "UTF-8"));
}
/**
* ECB加密,不要IV
* @param key 密钥
* @param data 明文
* @return Base64编码的密文
* @throws Exception
*/
publicstaticbyte[] des3EncodeECB(byte[] key, byte[] data)
throws Exception {
Key deskey = null;
DESedeKeySpec spec = new DESedeKeySpec(key);
SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, deskey);
byte[] bOut = cipher.doFinal(data);
return bOut;
}
/**
* ECB解密,不要IV
* @param key 密钥
* @param data Base64编码的密文
* @return 明文
* @throws Exception
*/
publicstaticbyte[] ees3DecodeECB(byte[] key, byte[] data)
throws Exception {
Key deskey = null;
DESedeKeySpec spec = new DESedeKeySpec(key);
SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, deskey);
byte[] bOut = cipher.doFinal(data);
return bOut;
}
/**
* CBC加密
* @param key 密钥
* @param keyiv IV
* @param data 明文
* @return Base64编码的密文
* @throws Exception
*/
publicstaticbyte[] des3EncodeCBC(byte[] key, byte[] keyiv, byte[] data)
throws Exception {
Key deskey = null;
DESedeKeySpec spec = new DESedeKeySpec(key);
SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");
IvParameterSpec ips = new IvParameterSpec(keyiv);
cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);
byte[] bOut = cipher.doFinal(data);
return bOut;
}
/**
* CBC解密
* @param key 密钥
* @param keyiv IV
* @param data Base64编码的密文
* @return 明文
* @throws Exception
*/
publicstaticbyte[] des3DecodeCBC(byte[] key, byte[] keyiv, byte[] data)
throws Exception {
Key deskey = null;
DESedeKeySpec spec = new DESedeKeySpec(key);
SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");
IvParameterSpec ips = new IvParameterSpec(keyiv);
cipher.init(Cipher.DECRYPT_MODE, deskey, ips);
byte[] bOut = cipher.doFinal(data);
return bOut;
}
}
下面是运行结果
ECB模式:
rmWB4+r9Ug93WI0KAEuMig==
中国ABCabc123
CBC模式:
4aabWF8UFour/vNfnzJrjw==
中国ABCabc123
另外,android下要使用3DES可考虑将BASE64Encoder替换成Base64
代码如下:
byte[] key=Base64.decode("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4".getBytes(),Base64.DEFAULT);
byte[] keyiv = { 1, 2, 3, 4, 5, 6, 7, 8 };
byte[] data="中国ABCabc123".getBytes("UTF-8");
System.out.println("ECB加密解密");
byte[] str3 = des3EncodeECB(key,data );
byte[] str4 = ees3DecodeECB(key, str3);
System.out.println(new String(Base64.encode(str3, Base64.DEFAULT),"UTF-8"));
System.out.println(new String(str4, "UTF-8"));
System.out.println();
System.out.println("CBC加密解密");
byte[] str5 = des3EncodeCBC(key, keyiv, data);
byte[] str6 = des3DecodeCBC(key, keyiv, str5);
System.out.println(new String(Base64.encode(str5, Base64.DEFAULT),"UTF-8"));
System.out.println(new String(str6, "UTF-8"));
}
原文:http://www.byywee.com/page/M0/S544/544514.html
三、java和php对等的3DES加密算法
java代码:
package org.jamie.demo;
import java.security.NoSuchAlgorithmException;
import java.security.Security;
import java.util.Random;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;
@SuppressWarnings("restriction")
public class TripleDES {
static {
Security.addProvider(new com.sun.crypto.provider.SunJCE());
}
private static final String MCRYPT_TRIPLEDES = "DESede";
private static final String TRANSFORMATION = "DESede/CBC/PKCS5Padding";
public static byte[] decrypt(byte[] data, byte[] key, byte[] iv) throws Exception {
DESedeKeySpec spec = new DESedeKeySpec(key);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(MCRYPT_TRIPLEDES);
SecretKey sec = keyFactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance(TRANSFORMATION);
IvParameterSpec IvParameters = new IvParameterSpec(iv);
cipher.init(Cipher.DECRYPT_MODE, sec, IvParameters);
return cipher.doFinal(data);
}
public static byte[] encrypt(byte[] data, byte[] key, byte[] iv) throws Exception {
DESedeKeySpec spec = new DESedeKeySpec(key);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede");
SecretKey sec = keyFactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance(TRANSFORMATION);
IvParameterSpec IvParameters = new IvParameterSpec(iv);
cipher.init(Cipher.ENCRYPT_MODE, sec, IvParameters);
return cipher.doFinal(data);
}
public static byte[] generateSecretKey() throws NoSuchAlgorithmException {
KeyGenerator keygen = KeyGenerator.getInstance(MCRYPT_TRIPLEDES);
return keygen.generateKey().getEncoded();
}
public static byte[] randomIVBytes() {
Random ran = new Random();
byte[] bytes = new byte[8];
for (int i = 0; i < bytes.length; ++i) {
bytes[i] = (byte) ran.nextInt(Byte.MAX_VALUE + 1);
}
return bytes;
}
public static void main(String args[]) throws Exception {
String plainText = "a12*&1c中文";
final byte[] secretBytes = TripleDES.generateSecretKey();
final byte[] ivbytes = TripleDES.randomIVBytes();
System.out.println("plain text: " + plainText);
byte[] encrypt = TripleDES.encrypt(plainText.getBytes(), secretBytes, ivbytes);
System.out.println("cipher text: " + encrypt);
System.out.println("decrypt text: " + new String(TripleDES.decrypt(encrypt, secretBytes, ivbytes), "UTF-8"));
}
}
Php代码
<?php
class TripleDES {
public static function genIvParameter() {
return mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_TRIPLEDES,MCRYPT_MODE_CBC), MCRYPT_RAND);
}
private static function pkcs5Pad($text, $blocksize) {
$pad = $blocksize - (strlen($text) % $blocksize); // in php, strlen returns the bytes of $text
return $text . str_repeat(chr($pad), $pad);
}
private static function pkcs5Unpad($text) {
$pad = ord($text{strlen($text)-1});
if ($pad > strlen($text)) return false;
if (strspn($text, chr($pad), strlen($text) - $pad) != $pad) return false;
return substr($text, 0, -1 * $pad);
}
public static function encryptText($plain_text, $key, $iv) {
$padded = TripleDES::pkcs5Pad($plain_text, mcrypt_get_block_size(MCRYPT_TRIPLEDES, MCRYPT_MODE_CBC));
return mcrypt_encrypt(MCRYPT_TRIPLEDES, $key, $padded, MCRYPT_MODE_CBC, $iv);
}
public static function decryptText($cipher_text, $key, $iv) {
$plain_text = mcrypt_decrypt(MCRYPT_TRIPLEDES, $key, $cipher_text, MCRYPT_MODE_CBC, $iv);
return TripleDES::pkcs5Unpad($plain_text);
}
};
/*
function main() {
$iv = TripleDES::genIvParameter();
print "\$iv=$iv\n";
$plain_text="this is a test,包括中文";
$key="ABCDEFGHIJ0123456789ABCD";
$cipher_text = TripleDES::encryptText($plain_text, $key, $iv);
print "\$cipher_text=$cipher_text\n";
$plain_text = TripleDES::decryptText($cipher_text, $key, $iv);
print "\$plain_text=$plain_text\n";
}
main();
*/
?>
转载于:https://blog.51cto.com/4789781/1215585
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