Android： JAVA和C# 3DES加密解密

时间：2024-09-22 21:06:26

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

  1. /// <summary>
  2. /// DES3加密解密
  3. /// </summary>
  4. public class Des3
  5. {
  6. #region CBC模式**
  7. /// <summary>
  8. /// DES3 CBC模式加密
  9. /// </summary>
  10. /// <param name="key">密钥</param>
  11. /// <param name="iv">IV</param>
  12. /// <param name="data">明文的byte数组</param>
  13. /// <returns>密文的byte数组</returns>
  14. public static byte[] Des3EncodeCBC( byte[] key, byte[] iv, byte[] data )
  15. {
  16. //复制于MSDN
  17. try
  18. {
  19. // Create a MemoryStream.
  20. MemoryStream mStream = new MemoryStream();
  21. TripleDESCryptoServiceProvider tdsp = new TripleDESCryptoServiceProvider();
  22. tdsp.Mode = CipherMode.CBC;             //默认值
  23. tdsp.Padding = PaddingMode.PKCS7;       //默认值
  24. // Create a CryptoStream using the MemoryStream
  25. // and the passed key and initialization vector (IV).
  26. CryptoStream cStream = new CryptoStream( mStream,
  27. tdsp.CreateEncryptor( key, iv ),
  28. CryptoStreamMode.Write );
  29. // Write the byte array to the crypto stream and flush it.
  30. cStream.Write( data, 0, data.Length );
  31. cStream.FlushFinalBlock();
  32. // Get an array of bytes from the
  33. // MemoryStream that holds the
  34. // encrypted data.
  35. byte[] ret = mStream.ToArray();
  36. // Close the streams.
  37. cStream.Close();
  38. mStream.Close();
  39. // Return the encrypted buffer.
  40. return ret;
  41. }
  42. catch ( CryptographicException e )
  43. {
  44. Console.WriteLine( "A Cryptographic error occurred: {0}", e.Message );
  45. return null;
  46. }
  47. }
  48. /// <summary>
  49. /// DES3 CBC模式解密
  50. /// </summary>
  51. /// <param name="key">密钥</param>
  52. /// <param name="iv">IV</param>
  53. /// <param name="data">密文的byte数组</param>
  54. /// <returns>明文的byte数组</returns>
  55. public static byte[] Des3DecodeCBC( byte[] key, byte[] iv, byte[] data )
  56. {
  57. try
  58. {
  59. // Create a new MemoryStream using the passed
  60. // array of encrypted data.
  61. MemoryStream msDecrypt = new MemoryStream( data );
  62. TripleDESCryptoServiceProvider tdsp = new TripleDESCryptoServiceProvider();
  63. tdsp.Mode = CipherMode.CBC;
  64. tdsp.Padding = PaddingMode.PKCS7;
  65. // Create a CryptoStream using the MemoryStream
  66. // and the passed key and initialization vector (IV).
  67. CryptoStream csDecrypt = new CryptoStream( msDecrypt,
  68. tdsp.CreateDecryptor( key, iv ),
  69. CryptoStreamMode.Read );
  70. // Create buffer to hold the decrypted data.
  71. byte[] fromEncrypt = new byte[data.Length];
  72. // Read the decrypted data out of the crypto stream
  73. // and place it into the temporary buffer.
  74. csDecrypt.Read( fromEncrypt, 0, fromEncrypt.Length );
  75. //Convert the buffer into a string and return it.
  76. return fromEncrypt;
  77. }
  78. catch ( CryptographicException e )
  79. {
  80. Console.WriteLine( "A Cryptographic error occurred: {0}", e.Message );
  81. return null;
  82. }
  83. }
  84. #endregion
  85. #region ECB模式
  86. /// <summary>
  87. /// DES3 ECB模式加密
  88. /// </summary>
  89. /// <param name="key">密钥</param>
  90. /// <param name="iv">IV(当模式为ECB时，IV无用)</param>
  91. /// <param name="str">明文的byte数组</param>
  92. /// <returns>密文的byte数组</returns>
  93. public static byte[] Des3EncodeECB( byte[] key, byte[] iv, byte[] data )
  94. {
  95. try
  96. {
  97. // Create a MemoryStream.
  98. MemoryStream mStream = new MemoryStream();
  99. TripleDESCryptoServiceProvider tdsp = new TripleDESCryptoServiceProvider();
  100. tdsp.Mode = CipherMode.ECB;
  101. tdsp.Padding = PaddingMode.PKCS7;
  102. // Create a CryptoStream using the MemoryStream
  103. // and the passed key and initialization vector (IV).
  104. CryptoStream cStream = new CryptoStream( mStream,
  105. tdsp.CreateEncryptor( key, iv ),
  106. CryptoStreamMode.Write );
  107. // Write the byte array to the crypto stream and flush it.
  108. cStream.Write( data, 0, data.Length );
  109. cStream.FlushFinalBlock();
  110. // Get an array of bytes from the
  111. // MemoryStream that holds the
  112. // encrypted data.
  113. byte[] ret = mStream.ToArray();
  114. // Close the streams.
  115. cStream.Close();
  116. mStream.Close();
  117. // Return the encrypted buffer.
  118. return ret;
  119. }
  120. catch ( CryptographicException e )
  121. {
  122. Console.WriteLine( "A Cryptographic error occurred: {0}", e.Message );
  123. return null;
  124. }
  125. }
  126. /// <summary>
  127. /// DES3 ECB模式解密
  128. /// </summary>
  129. /// <param name="key">密钥</param>
  130. /// <param name="iv">IV(当模式为ECB时，IV无用)</param>
  131. /// <param name="str">密文的byte数组</param>
  132. /// <returns>明文的byte数组</returns>
  133. public static byte[] Des3DecodeECB( byte[] key, byte[] iv, byte[] data )
  134. {
  135. try
  136. {
  137. // Create a new MemoryStream using the passed
  138. // array of encrypted data.
  139. MemoryStream msDecrypt = new MemoryStream( data );
  140. TripleDESCryptoServiceProvider tdsp = new TripleDESCryptoServiceProvider();
  141. tdsp.Mode = CipherMode.ECB;
  142. tdsp.Padding = PaddingMode.PKCS7;
  143. // Create a CryptoStream using the MemoryStream
  144. // and the passed key and initialization vector (IV).
  145. CryptoStream csDecrypt = new CryptoStream( msDecrypt,
  146. tdsp.CreateDecryptor( key, iv ),
  147. CryptoStreamMode.Read );
  148. // Create buffer to hold the decrypted data.
  149. byte[] fromEncrypt = new byte[data.Length];
  150. // Read the decrypted data out of the crypto stream
  151. // and place it into the temporary buffer.
  152. csDecrypt.Read( fromEncrypt, 0, fromEncrypt.Length );
  153. //Convert the buffer into a string and return it.
  154. return fromEncrypt;
  155. }
  156. catch ( CryptographicException e )
  157. {
  158. Console.WriteLine( "A Cryptographic error occurred: {0}", e.Message );
  159. return null;
  160. }
  161. }
  162. #endregion
  163. /// <summary>
  164. /// 类测试
  165. /// </summary>
  166. public static void Test()
  167. {
  168. System.Text.Encoding utf8 = System.Text.Encoding.UTF8;
  169. //key为abcdefghijklmnopqrstuvwx的Base64编码
  170. byte[] key = Convert.FromBase64String( "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4" );
  171. byte[] iv = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };      //当模式为ECB时，IV无用
  172. byte[] data = utf8.GetBytes( "中国ABCabc123" );
  173. System.Console.WriteLine( "ECB模式:" );
  174. byte[] str1 = Des3.Des3EncodeECB( key, iv, data );
  175. byte[] str2 = Des3.Des3DecodeECB( key, iv, str1 );
  176. System.Console.WriteLine( Convert.ToBase64String( str1 ) );
  177. System.Console.WriteLine( System.Text.Encoding.UTF8.GetString( str2 ) );
  178. System.Console.WriteLine();
  179. System.Console.WriteLine( "CBC模式:" );
  180. byte[] str3 = Des3.Des3EncodeCBC( key, iv, data );
  181. byte[] str4 = Des3.Des3DecodeCBC( key, iv, str3 );
  182. System.Console.WriteLine( Convert.ToBase64String( str3 ) );
  183. System.Console.WriteLine( utf8.GetString( str4 ) );
  184. System.Console.WriteLine();
  185. }
  186. }

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接着是Java代码

  1. import java.security.Key;
  2. import javax.crypto.Cipher;
  3. import javax.crypto.SecretKeyFactory;
  4. import javax.crypto.spec.DESedeKeySpec;
  5. import javax.crypto.spec.IvParameterSpec;
  6. import sun.misc.BASE64Decoder;
  7. import sun.misc.BASE64Encoder;
  8. public class Des3 {
  9. public static void main(String[] args) throws Exception {
  10. byte[] key=new BASE64Decoder().decodeBuffer("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4");
  11. byte[] keyiv = { 1, 2, 3, 4, 5, 6, 7, 8 };
  12. byte[] data="中国ABCabc123".getBytes("UTF-8");
  13. System.out.println("ECB加密解密");
  14. byte[] str3 = des3EncodeECB(key,data );
  15. byte[] str4 = ees3DecodeECB(key, str3);
  16. System.out.println(new BASE64Encoder().encode(str3));
  17. System.out.println(new String(str4, "UTF-8"));
  18. System.out.println();
  19. System.out.println("CBC加密解密");
  20. byte[] str5 = des3EncodeCBC(key, keyiv, data);
  21. byte[] str6 = des3DecodeCBC(key, keyiv, str5);
  22. System.out.println(new BASE64Encoder().encode(str5));
  23. System.out.println(new String(str6, "UTF-8"));
  24. }
  25. /**
  26. * ECB加密,不要IV
  27. * @param key 密钥
  28. * @param data 明文
  29. * @return Base64编码的密文
  30. * @throws Exception
  31. */
  32. public static byte[] des3EncodeECB(byte[] key, byte[] data)
  33. throws Exception {
  34. Key deskey = null;
  35. DESedeKeySpec spec = new DESedeKeySpec(key);
  36. SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
  37. deskey = keyfactory.generateSecret(spec);
  38. Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");
  39. cipher.init(Cipher.ENCRYPT_MODE, deskey);
  40. byte[] bOut = cipher.doFinal(data);
  41. return bOut;
  42. }
  43. /**
  44. * ECB解密,不要IV
  45. * @param key 密钥
  46. * @param data Base64编码的密文
  47. * @return 明文
  48. * @throws Exception
  49. */
  50. public static byte[] ees3DecodeECB(byte[] key, byte[] data)
  51. throws Exception {
  52. Key deskey = null;
  53. DESedeKeySpec spec = new DESedeKeySpec(key);
  54. SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
  55. deskey = keyfactory.generateSecret(spec);
  56. Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");
  57. cipher.init(Cipher.DECRYPT_MODE, deskey);
  58. byte[] bOut = cipher.doFinal(data);
  59. return bOut;
  60. }
  61. /**
  62. * CBC加密
  63. * @param key 密钥
  64. * @param keyiv IV
  65. * @param data 明文
  66. * @return Base64编码的密文
  67. * @throws Exception
  68. */
  69. public static byte[] des3EncodeCBC(byte[] key, byte[] keyiv, byte[] data)
  70. throws Exception {
  71. Key deskey = null;
  72. DESedeKeySpec spec = new DESedeKeySpec(key);
  73. SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
  74. deskey = keyfactory.generateSecret(spec);
  75. Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");
  76. IvParameterSpec ips = new IvParameterSpec(keyiv);
  77. cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);
  78. byte[] bOut = cipher.doFinal(data);
  79. return bOut;
  80. }
  81. /**
  82. * CBC解密
  83. * @param key 密钥
  84. * @param keyiv IV
  85. * @param data Base64编码的密文
  86. * @return 明文
  87. * @throws Exception
  88. */
  89. public static byte[] des3DecodeCBC(byte[] key, byte[] keyiv, byte[] data)
  90. throws Exception {
  91. Key deskey = null;
  92. DESedeKeySpec spec = new DESedeKeySpec(key);
  93. SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
  94. deskey = keyfactory.generateSecret(spec);
  95. Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");
  96. IvParameterSpec ips = new IvParameterSpec(keyiv);
  97. cipher.init(Cipher.DECRYPT_MODE, deskey, ips);
  98. byte[] bOut = cipher.doFinal(data);
  99. return bOut;
  100. }
  101. }

复制代码

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：

  1. public static void main(String[] args) throws Exception {
  2. byte[] key=Base64.decode("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4".getBytes(),Base64.DEFAULT);
  3. byte[] keyiv = { 1, 2, 3, 4, 5, 6, 7, 8 };
  4. byte[] data="中国ABCabc123".getBytes("UTF-8");
  5. System.out.println("ECB加密解密");
  6. byte[] str3 = des3EncodeECB(key,data );
  7. byte[] str4 = ees3DecodeECB(key, str3);
  8. System.out.println(new String(Base64.encode(str3,  Base64.DEFAULT),"UTF-8"));
  9. System.out.println(new String(str4, "UTF-8"));
  10. System.out.println();
  11. System.out.println("CBC加密解密");
  12. byte[] str5 = des3EncodeCBC(key, keyiv, data);
  13. byte[] str6 = des3DecodeCBC(key, keyiv, str5);
  14. System.out.println(new String(Base64.encode(str5,  Base64.DEFAULT),"UTF-8"));
  15. System.out.println(new String(str6, "UTF-8"));
  16. }

复制代码

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