//変換テーブル
 const char B64[] ="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
 #define  Val(i)  ( buf[i] == '=' ? 0 : strchr(B64, buf[i]) - B64 )
 
 
 //デコード
 char * FromBase64(unsigned char *buf)
 {
     char *ReturnBuf = new char[strlen(buf)+1];
 
     int j=0;
     int l = strlen(buf);
     //4バイトずつ処理
     for (int i=0;i&l;l;i+=4){
         ReturnBuf[j]   =(char)( (Val(i) << 2) | ((Val(i+1) & 0x30) >> 4));
         ReturnBuf[j+1] =(char)( ((Val(i+1) & 0x0f) << 4) | ((Val(i+2) & 0x3c) >> 2));
         ReturnBuf[j+2] =(char)( ((Val(i+2) & 0x03) << 6) | (Val(i+3) & 0x3f));
         j += 3;
     }
 
     ReturnBuf[j] = NULL;
     return (ReturnBuf);
 }
 
 
 //エンコード
 char * ToBase64(unsigned char *buf)
 {
     char *ReturnBuf = new char[strlen(buf)*2];
     //一時的に保存するバッファ
     unsigned char *Buf = new char[strlen(buf)*2];
     memset(Buf,strlen(buf)*2,0);
     strcpy(Buf,buf);
     int j=0;
     int l = strlen(buf);
     //3バイトずつ処理
     for (int i=0;i&l;l;i+=3){
 	//2006.06.19 修正（池田様より情報提供頂きました。）
         //ReturnBuf[j]   =(char)(0==(Buf[i] >> 2))?'=':( B64[ Buf[i] >> 2 ]);
         //ReturnBuf[j+1] =(char)(0==((Buf[i] & 0x03)<<4 | (Buf[i+1]>>4)))?'=':( B64[ (Buf[i] & 0x03)<<4 | (Buf[i+1]>>4) ]);
         //ReturnBuf[j+2] =(char)(0==((Buf[i+1] & 0x0f)<<2 | (Buf[i+2] >>6)))?'=':( B64[ (Buf[i+1] & 0x0f)<<2 | (Buf[i+2] >>6)]);
         //ReturnBuf[j+3] =(char)(0==(Buf[i+2] & 0x3f))?'=':( B64[ Buf[i+2] & 0x3f]);
         ReturnBuf[j]   =(char)(0==(Buf[i] >> 2))?'A':( B64[ Buf[i] >> 2 ]);
         ReturnBuf[j+1] =(char)(0==((Buf[i] & 0x03)<<4 | (Buf[i+1]>>4)))?'A':( B64[ (Buf[i] & 0x03)<<4 | (Buf[i+1]>>4) ]);
         ReturnBuf[j+2] =(char)(0==((Buf[i+1] & 0x0f)<<2 | (Buf[i+2] >>6)))?'A':( B64[ (Buf[i+1] & 0x0f)<<2 | (Buf[i+2] >>6)]);
         ReturnBuf[j+3] =(char)(0==(Buf[i+2] & 0x3f))?'A':( B64[ Buf[i+2] & 0x3f]);
         j += 4;
     }
     ReturnBuf[j] = NULL;
     delete [] Buf;
     return (ReturnBuf);
 }