Android: JAVA和C# 3DES加密解密
最近 一个项目.net 要调用JAVA的WEB
SERVICE,数据采用3DES加密,涉及到两种语言3DES一致性的问题,
下面分享一下,
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
- /// <summary>
- /// DES3加密解密
- /// </summary>
- public class 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>
- public static byte[] 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 );
- return null;
- }
- }
- /// <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>
- public static byte[] 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 = new byte[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 );
- return null;
- }
- }
- #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>
- public static byte[] 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 );
- return null;
- }
- }
- /// <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>
- public static byte[] 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 = new byte[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 );
- return null;
- }
- }
- #endregion
- /// <summary>
- /// 类测试
- /// </summary>
- public static void Test()
- {
- System.Text.Encoding utf8 = System.Text.Encoding.UTF8;
- //key为abcdefghijklmnopqrstuvwx的Base64编码
- byte[] key = Convert.FromBase64String( "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4" );
- byte[] iv = new byte[] { 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 java.security.Key;
- 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;
- public class Des3 {
- public static void 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
- */
- public static byte[] 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
- */
- public static byte[] 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
- */
- public static byte[] 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
- */
- public static byte[] 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:
- public static void main(String[] args) throws Exception {
- 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"));
- }