3Des encryption and decryption C # --- & gt; Java,

3Des encryption and decryption C # ---> Java,

The Byte range of Java is-128 to 127, and the Byte range of c # is 0-255.
The core is to determine the Mode and Padding. You can search for articles related to the 3DES algorithm.

C #

/// <Summary> // DES3 encryption and decryption // </summary> public class Des3 {# region CBC mode ** // <summary> // DES3 CBC mode encryption /// </summary> /// <param name = "key"> key </param> /// <param name = "iv"> IV </param >/// <param name = "data"> plaintext byte array </param> /// <returns> ciphertext byte array </returns> public static byte [] Des3EncodeCBC (byte [] key, byte [] iv, byte [] data) {// copy to MSDN try {// Create a MemoryStream. memoryStream mStream = new MemoryStream (); TripleDESCryptoServiceProvider tdsp = new TripleDESCryptoServiceProvider (); tdsp. mode = CipherMode. CBC; // default value: tdsp. padding = PaddingMode. PKCS7; // default value // 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 mode decryption /// </summary> /// <param name = "key"> key </param> // <param name = "iv"> IV </param> // <param name = "data"> ciphertext byte array </param> // <returns> plaintext byte array </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 mode // <summary> // DES3 ECB mode encryption /// </summary> /// <param name = "key"> key </ param> // <param name = "iv"> IV (when the mode is ECB, IV useless) </param> /// <param name = "str"> plaintext byte array </param> /// <returns> ciphertext byte array </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 mode decryption /// </summary> /// <param name = "key"> key </param> // <param name = "iv"> IV (when the mode is ECB, IV useless) </param> /// <param name = "str"> ciphertext byte array </param> /// <returns> plaintext byte array </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> // class Test /// </summary> public static void Test () {System. text. encoding utf8 = System. text. encoding. UTF8; // The key is abcdefghijklmnopqrstuvwx Base64 encoded byte [] key = Convert. fromBase64String ("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4"); byte [] iv = new byte [] {1, 2, 3, 4, 5, 6, 7, 8 }; // when the mode is ECB, IV useless byte [] data = utf8.GetBytes ("China ABCabc123"); System. console. writeLine ("ECB mode:"); 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 mode:"); 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 ();}}

Java

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 ("bytes"); byte [] keyiv = {1, 2, 3, 4, 5, 6, 7, 8}; byte [] data = "China ABCabc123 ". getBytes ("UTF-8"); System. out. println ("ECB encryption and decryption"); 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 encryption and decryption"); 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 encrypted, do not IV * @ param key * @ param data plaintext * @ return Base64 encoded ciphertext * @ throws Exception */public static byte [] des3EncodeECB (byte [] key, byte [] data) throws Exception {Key secret ey = null; DESedeKeySpec spec = new DESedeKeySpec (key); SecretKeyFactory keyfactory = SecretKeyFactory. getInstance ("desede"); cipher ey = keyfactory. generateSecret (spec); Cipher cipher = Cipher. getInstance ("desede" + "/ECB/PKCS5Padding"); cipher. init (Cipher. ENCRYPT_MODE, cipher ey); byte [] bOut = cipher. doFinal (data); return bOut;}/*** ECB decryption, do not IV * @ param key * @ param data Base64 encoded ciphertext * @ return plaintext * @ throws Exception */public static byte [] ees3DecodeECB (byte [] key, byte [] data) throws Exception {Key secret ey = null; DESedeKeySpec spec = new DESedeKeySpec (key); SecretKeyFactory keyfactory = SecretKeyFactory. getInstance ("desede"); cipher ey = keyfactory. generateSecret (spec); Cipher cipher = Cipher. getInstance ("desede" + "/ECB/PKCS5Padding"); cipher. init (Cipher. DECRYPT_MODE, cipher ey); byte [] bOut = cipher. doFinal (data); return bOut ;} /*** CBC encryption ** @ param key * @ param keyiv * @ param data plaintext * @ return Base64 encoded ciphertext * @ throws Exception */public static byte [] des3EncodeCBC (byte [] key, byte [] keyiv, byte [] data) throws Exception {Key secret ey = null; DESedeKeySpec spec = new DESedeKeySpec (key); SecretKeyFactory keyfactory = SecretKeyFactory. getInstance ("desede"); cipher ey = keyfactory. generateSecret (spec); Cipher cipher = Cipher. getInstance ("desede" + "/CBC/PKCS5Padding"); IvParameterSpec ips = new IvParameterSpec (keyiv); cipher. init (Cipher. ENCRYPT_MODE, cipher ey, ips); byte [] bOut = cipher. doFinal (data); return bOut ;} /**** CBC decryption * @ param key * @ param keyiv IV * @ param data Base64 encoded ciphertext * @ return plaintext * @ throws Exception */public static byte [] des3DecodeCBC (byte [] key, byte [] keyiv, byte [] data) throws Exception {Key secret ey = null; DESedeKeySpec spec = new DESedeKeySpec (key); SecretKeyFactory keyfactory = SecretKeyFactory. getInstance ("desede"); cipher ey = keyfactory. generateSecret (spec); Cipher cipher = Cipher. getInstance ("desede" + "/CBC/PKCS5Padding"); IvParameterSpec ips = new IvParameterSpec (keyiv); cipher. init (Cipher. DECRYPT_MODE, cipher ey, ips); byte [] bOut = cipher. doFinal (data); return bOut ;}}