is this correct?CBCencryption and decryption

[David Wong]

hello, everyone, I am trying to write some codes to encrypt and decrypt one small string plaintext using symmetric algorithms. the crypto++ version is 4.1, the following is my source codes. for encryption, I can get some result, but for decryption, always get nothing, seems wrong code. after I get hex result from encryption, I use the hex encryption result as input to decrypt. thanks       encryption:   char INPUTBUF[BUFSIZE],OUTPUTBUF[BUFSIZE];        byte key[16], iv[16];      HexEncoder hexEncoder;      AutoSeededRandomPool rng;      rng.GenerateBlock(key, 16);        rng.GenerateBlock(iv, 16);      AESEncryption aesEncryption(key, 16);     CBCPaddedEncryptor cbcEncryptor(aesEncryption, iv, new HexEncoder);     cbcEncryptor.Put((byte*)INPUTBUF, (unsigned int) strlen(INPUTBUF));     cbcEncryptor.MessageEnd();       unsigned int outputLength = cbcEncryptor.MaxRetrieveable();     char *outstr = new char[outputLength+1];     cbcEncryptor.Get((byte *)outstr, outputLength);     outstr[outputLength] = '\0';     strcpy((char*)OUTPUTBUF,(char*)outstr);     delete[] outstr;       decryption:      byte key[16], iv[16];  AutoSeededRandomPool rng;   rng.GenerateBlock(key, 16);   rng.GenerateBlock(iv, 16);     AESDecryption aesDecryption(key, 16);   CBCPaddedDecryptor cbcDecryptor(aesDecryption, iv, new HexDecoder);   cbcDecryptor.Put((byte *)INPUTBUF, (unsigned int) strlen(INPUTBUF));   cbcDecryptor.MessageEnd();     unsigned int outputLength =cbcDecryptor.MaxRetrieveable(); (//note: the outputLength is always 0, do not know why???)   char *outstr = new char[outputLength+1];    cbcDecryptor.Get((byte *)outstr, outputLength);   outstr[outputLength] = '\0';    strcpy((char*)OUTPUTBUF,(char*)outstr);   delete[] outstr;