java_加密解密

来源：互联网发布：linux自动化运维编辑：程序博客网时间：2024/05/23 20:06
    /**      * 加密解密（使用方法直接看最下面的main方法）      * @author liupeng      *      */      public class LiupengEnDe      {          private static final String liupengKey = "lp_294333475";          private static boolean InitRC4(byte[] pRC4Table, byte[] pKeyTable)          {              int i;              int b=0;              int Temp;              int KeyLen = pKeyTable.length;              //置初值              for(i=0;i<256;i++){                  pRC4Table[i]= (byte)i;              }              //变值              for(i=0;i<256;i++)              {                  b = (b + (pRC4Table[i]& 0x0FF) + (pKeyTable[i % KeyLen]& 0x0ff)) % 256;                  Temp = (int)pRC4Table[i];                  pRC4Table[i] = pRC4Table[b];                  pRC4Table[b] = (byte)Temp;              }              return true;          }          private static boolean InitBase64(byte[] pDecodeTable, byte[] pBase64Tab)          {              byte[] tDecodeTable ={                      (byte)255, (byte)255, (byte)255, (byte)255, (byte)255,                       (byte)255, (byte)255, (byte)255, (byte)255, (byte)255,                      (byte)255, (byte)255, (byte)255, (byte)255, (byte)255,                       (byte)255, (byte)255, (byte)255, (byte)255, (byte)255,                      (byte)255, (byte)255, (byte)255, (byte)255, (byte)255,                       (byte)255, (byte)255, (byte)255, (byte)255, (byte)255,                      (byte)255, (byte)255, (byte)255, (byte)255, (byte)255,                       (byte)255, (byte)255, (byte)255, (byte)255, (byte)255,                      (byte)255, (byte)255, (byte)255, 62 , (byte)255, (byte)255,                       (byte)255, 63 , 52 , 53 ,                      54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , (byte)255, (byte)255,                      (byte)255, 64 , (byte)255, (byte)255, (byte)255, 0  , 1  , 2  , 3  , 4  ,                      5  , 6  , 7  , 8  , 9  , 10 , 11 , 12 , 13 , 14 ,                      15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ,                      25 , (byte)255, (byte)255, (byte)255, (byte)255, (byte)255,                       (byte)255, 26 , 27 , 28 ,                      29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ,                      39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 ,                      49 , 50 , 51 , (byte)255, (byte)255, (byte)255, (byte)255,                       (byte)255, (byte)255, (byte)255,                      (byte)255, (byte)255, (byte)255, (byte)255, (byte)255, (byte)255,                       (byte)255, (byte)255, (byte)255, (byte)255,                      (byte)255, (byte)255, (byte)255,(byte)255, (byte)255, (byte)255,                       (byte)255, (byte)255, (byte)255, (byte)255,                      (byte)255, (byte)255, (byte)255, (byte)255, (byte)255, (byte)255,                      (byte)255,(byte)255, (byte)255, (byte)255,                      (byte)255, (byte)255, (byte)255, (byte)255, (byte)255, (byte)255,                       (byte)255, (byte)255, (byte)255, (byte)255,                      (byte)255, (byte)255, (byte)255, (byte)255, (byte)255, (byte)255,                      (byte)255, (byte)255, (byte)255, (byte)255,                      (byte)255, (byte)255, (byte)255, (byte)255, (byte)255, (byte)255,                       (byte)255, (byte)255, (byte)255, (byte)255,                      (byte)255, (byte)255, (byte)255, (byte)255, (byte)255, (byte)255,                       (byte)255, (byte)55, (byte)255, (byte)255,                      (byte)255, (byte)255, (byte)255, (byte)255, (byte)255, (byte)255,                       (byte)255, (byte)255, (byte)255, (byte)255,                      (byte)255, (byte)255, (byte)255, (byte)255, (byte)255, (byte)255,                       (byte)255, (byte)255, (byte)255, (byte)255,                      (byte)255, (byte)255, (byte)255, (byte)255, (byte)255, (byte)255,                       (byte)255, (byte)255, (byte)255, (byte)255,                      (byte)255, (byte)255, (byte)255, (byte)255};                  int iLoop;                  for(iLoop=0;iLoop<234;iLoop++)                      pDecodeTable[iLoop] = tDecodeTable[iLoop];                  for(iLoop=65;iLoop<=90;iLoop++)                      pBase64Tab[iLoop - 65] = (byte)iLoop;                  for(iLoop=97;iLoop<=122;iLoop++)                      pBase64Tab[iLoop - 71] = (byte)iLoop;                  for(iLoop=0;iLoop<=9;iLoop++)                      pBase64Tab[iLoop + 52] =(byte)(48+iLoop);                  pBase64Tab[62] = 43;                  pBase64Tab[63] = 47;              return true;          }          public static byte[] Base64EncryptByte(byte[] DataIn)          {              byte[] Base64Tab=new byte[64];              byte[] DecodeTable=new byte[234];              InitBase64(DecodeTable,Base64Tab);              byte[] DataTemp = new byte[4];              int iTemp=0;              int iLoop=0;              int BytesDataIn=0;              int BytesDataOut=0;              int ExtraBytes=0;              byte[] DataOut = null;      //      BytesDataIn = _mbslen(DataIn);              BytesDataIn = DataIn.length;              ExtraBytes = BytesDataIn % 3;              if(ExtraBytes == 0)                BytesDataOut = (BytesDataIn / 3) * 4;              else                BytesDataOut = ((int)(BytesDataIn / 3) + 1) * 4;              DataOut = new byte[BytesDataOut];              for(iLoop = 0;iLoop<=(BytesDataIn - ExtraBytes - 1);iLoop+=3)              {                  DataOut[iTemp] = Base64Tab[((int)((DataIn[iLoop] & 0x0ff) / 4) & 0x03F)];                  DataOut[iTemp + 1] = Base64Tab[(DataIn[iLoop] & 0x003) * 16 | ((int)((DataIn[iLoop + 1]&0x0ff) / 16)) & 0x0F];                  DataOut[iTemp + 2] = Base64Tab[(DataIn[iLoop + 1] & 0x00F) * 4 | ((int)((DataIn[iLoop + 2]&0x0ff) / 64)) & 0x03];                  DataOut[iTemp + 3] = Base64Tab[DataIn[iLoop + 2] & 0x03F];                  iTemp += 4;              }              if(ExtraBytes == 1)              {                  DataTemp[0] = DataIn[BytesDataIn-1];                  DataTemp[1] = 0;                  DataTemp[2] = 0;                  DataOut[BytesDataOut - 4] = Base64Tab[(int)((DataTemp[0]& 0x0ff) / 4) & 0x3F];                  DataOut[BytesDataOut - 3] = Base64Tab[(DataTemp[0] & 0x003) * 16 | (int)((DataTemp[1] & 0x0ff) / 16) & 0x0F];                  DataOut[BytesDataOut - 2] = 61;                  DataOut[BytesDataOut - 1] = 61;              }              else if (ExtraBytes == 2)              {                  DataTemp[0] = DataIn[BytesDataIn - 2];                  DataTemp[1] = DataIn[BytesDataIn - 1];                  DataTemp[2] = 0;                  DataOut[BytesDataOut - 4] = Base64Tab[(int)((DataTemp[0]&0x0ff)/ 4) & 0x3F];                  DataOut[BytesDataOut - 3] = Base64Tab[(DataTemp[0] & 0x003) * 16 | (int)((DataTemp[1] & 0x0ff) / 16) & 0x0F];                  DataOut[BytesDataOut - 2] = Base64Tab[(DataTemp[1] & 0x00F) * 4 | (int)((DataTemp[2]&0x0ff) / 64) & 0x03];                  DataOut[BytesDataOut - 1] = 61;              }              return DataOut;          }           public static byte[] Base64DecryptByte(byte[] DataIn) throws Exception           {              byte[] Base64Tab=new byte[64];              byte[] DecodeTable=new byte[234];              byte[] DataOut = null;              InitBase64(DecodeTable,Base64Tab);              byte[] DataTemp = new byte[4];              int iTemp=0;              int iLoop=0;              int BytesDataIn=0;              int ExtraBytes=0;              BytesDataIn = DataIn.length;              if(DataIn[BytesDataIn-1] == 61){                  ExtraBytes = 1;                  if(DataIn[BytesDataIn-2] == 61)                      ExtraBytes = 2;              }              int BytesDataOut = (int)((BytesDataIn * 0.75) - ExtraBytes);              DataOut = new byte[BytesDataOut];              try{                  for(iLoop = 0;iLoop<(BytesDataIn - 5);iLoop+=4){                      //DataTemp[0] = DecodeTable[DataIn[iLoop]];                      DataTemp[1] = DecodeTable[DataIn[iLoop + 1]];                      DataTemp[2] = DecodeTable[DataIn[iLoop + 2]];                      //DataTemp[3] = DecodeTable[DataIn[iLoop + 3]];                       DataOut[iTemp] = (byte) ((DecodeTable[DataIn[iLoop]] * 4) | ((int)(DataTemp[1] / 16) & 0x03));                      DataOut[iTemp + 1] = (byte) (((DataTemp[1] & 0x0F) * 16) | ((int)(DataTemp[2] / 4) & 0x0F));                      DataOut[iTemp + 2] = (byte) (((DataTemp[2] & 0x03) * 64) | DecodeTable[DataIn[iLoop + 3]]);                      iTemp += 3;                  }              } catch (Exception e){                  throw new Exception("It is not BASE64 encode string");              }              DataTemp[0] = DecodeTable[DataIn[iLoop]];              DataTemp[1] = DecodeTable[DataIn[iLoop + 1]];              DataTemp[2] = DecodeTable[DataIn[iLoop + 2]];              DataTemp[3] = DecodeTable[DataIn[iLoop + 3]];              if(DataTemp[3] == 64 || DataTemp[2] == 64){                  if(DataTemp[3] == 64 && DataTemp[2] != 64){                      DataTemp[0] = DecodeTable[DataIn[iLoop]];                      DataTemp[1] = DecodeTable[DataIn[iLoop + 1]];                      DataTemp[2] = DecodeTable[DataIn[iLoop + 2]];                      DataOut[iTemp] = (byte) ((DataTemp[0] * 4) | ((int)(DataTemp[1] / 16) & 0x03));                      DataOut[iTemp + 1] = (byte) (((DataTemp[1] & 0x0F) * 16) | ((int)(DataTemp[2] / 4) & 0x0F));                      return DataOut;                  }else if(DataTemp[2] == 64){                      DataTemp[0] = DecodeTable[DataIn[iLoop]];                      DataTemp[1] = DecodeTable[DataIn[iLoop + 1]];                      DataOut[iTemp] = (byte) ((DataTemp[0] * 4) | ((int)(DataTemp[1] / 16) & 0x03));                      return DataOut;                  }              }              DataOut[iTemp] = (byte) ((DataTemp[0] * 4) | ((int)(DataTemp[1] / 16) & 0x03));              DataOut[iTemp + 1] = (byte) (((DataTemp[1] & 0x0F) * 16) | ((int)(DataTemp[2] / 4) & 0x0F));              DataOut[iTemp + 2] = (byte) (((DataTemp[2] & 0x03) * 64) | DataTemp[3]);              return DataOut;           }           public static boolean RC4EnDecryptByte(byte[] Key, byte[] EnDecryptData)           {              //初始化              byte[] pRC4Table=new byte[256];              InitRC4(pRC4Table,Key);              int i,j;              int iLoop;              int Temp;              int EnDecryptDataLen = EnDecryptData.length;              //加密数据              i=0;              j=0;              for(iLoop=0;iLoop<(int)EnDecryptDataLen;iLoop++) {                  i = (i + 1) % 256;                  j = (j + pRC4Table[i] & 0x0ff) % 256;                  Temp = (int)pRC4Table[i];                  pRC4Table[i]=pRC4Table[j];                  pRC4Table[j]=(byte)Temp;                  EnDecryptData[iLoop]=(byte)( EnDecryptData[iLoop] ^ (pRC4Table[((pRC4Table[i] & 0x0ff) + (pRC4Table[j] & 0x0ff)) % 256]));              }              return true;           }           public static String LiupengEncryptString(String dataIn)           {               byte[] dataInBytes = dataIn.getBytes();               RC4EnDecryptByte(liupengKey.getBytes(), dataInBytes);               byte[] base64Bytes = Base64EncryptByte(dataInBytes);               String retString = new String(base64Bytes);               return retString;            }           public static String LiupengEncryptBytes(byte[] dataIn)           {               RC4EnDecryptByte(liupengKey.getBytes(), dataIn);               byte[] base64Bytes = Base64EncryptByte(dataIn);               String retString = new String(base64Bytes);               return retString;            }           public static String LiupengDecryptString(String dataIn) throws Exception           {               byte[] dataInBase64 = Base64DecryptByte(dataIn.getBytes());               RC4EnDecryptByte(liupengKey.getBytes(), dataInBase64);               String retString = new String(dataInBase64);               return retString;           }           public static byte[] LiupengDecryptToBytes(String dataIn) throws Exception           {               byte[] dataInBase64 = Base64DecryptByte(dataIn.getBytes());               RC4EnDecryptByte(liupengKey.getBytes(), dataInBase64);               return dataInBase64;           }           public static String LiupengEncryptString(String dataIn, String userKey)           {               byte[] dataInBytes = dataIn.getBytes();               StringBuilder sb = new StringBuilder();               sb.append(userKey).append(liupengKey).append(userKey);               RC4EnDecryptByte(sb.toString().getBytes(), dataInBytes);               byte[] base64Bytes = Base64EncryptByte(dataInBytes);               String retString = new String(base64Bytes);               return retString;            }           public static String LiupengDecryptString(String dataIn, String userKey) throws Exception           {               byte[] dataInBase64 = Base64DecryptByte(dataIn.getBytes());               StringBuilder sb = new StringBuilder();               sb.append(userKey).append(liupengKey).append(userKey);               RC4EnDecryptByte(sb.toString().getBytes(), dataInBase64);               String retString = new String(dataInBase64);               return retString;           }           public static void main(String[] args) throws Exception{               String JPwd = LiupengEnDe.LiupengEncryptString("1234", "liupeng");                  System.out.println(JPwd);//eI8snA==                  String OPwd = LiupengEnDe.LiupengDecryptString("eI8snA==", "liupeng");                  System.out.println(OPwd);//1234                  String test = LiupengEnDe.LiupengEncryptString("1234");                  System.out.println(test);//WOGKxg==                  String test1 = LiupengEnDe.LiupengDecryptString("WOGKxg==");                  System.out.println(test1);//1234           }      }
0 0