enc probs

[Lee Melville]

I am trying to encrypt a file and have tried allsorts to get the thing
working.  What am i doing wrong?  It seems to corrupt within the while llop
that updates the encryption.

thanks in advance

Lee Melville

Here is the code

//--------------------------------------------------------------------------
---------
 OpenSSL_add_all_algorithms();

 char key[EVP_MAX_KEY_LENGTH];
 char iv[EVP_MAX_IV_LENGTH];
 EVP_CIPHER_CTX ctx;
 unsigned char out[512+8];
 int outl;
 char passwd[] = "password";
 EVP_CIPHER *ciph;
 //EVP_MD *md;
 int i;
 char buff[1024];

 CFile fileIn;
 fileIn.Open("A:\\test.txt", CFile::typeBinary | CFile::modeRead, NULL);
 CFile fileOut;
 fileOut.Open("A:\\test.enc", CFile::typeBinary | CFile::modeWrite, NULL);

 ciph = EVP_bf_cbc();
 EVP_BytesToKey(ciph,EVP_md5(),NULL,(unsigned char
*)passwd,strlen(passwd),1,(unsigned char *)key,(unsigned char *)iv);
 cout << "begin init:" << endl;
 EVP_EncryptInit(&ctx, ciph, (unsigned char *)key, (unsigned char *)iv);
 cout << "begin update:" << endl;

 i=0;
 //fileIn.Read(&buff,0);
 i++;
 while (i = (fileIn.Read(buff, sizeof buff)) != NULL){
  cout << "test: " << buff << " : " << outl << endl;
  EVP_EncryptUpdate(&ctx, out, &outl, (unsigned char *)buff, 512);
  fileOut.Write(&out, outl);
  i++;
 }

 EVP_EncryptFinal(&ctx, out, &outl);
 fileOut.Write(&out, outl);
 fileIn.Close();
 fileOut.Close();

//-------------------------------------------------------------

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