Base64 encoding with BIO_new_mem_buf

[k b]

Hi,

I'm trying to use BIO to do base64 encoding.
but here's the problem
in the sample code below,
if I comment out like <<<< 1 (which uses mem bio) and uncomment <<<<2 (one 
that uses file bio)
everything works and the encoded string is written the std out.
Which is good as it tells me that things are working fine.

But what i really want is the encoded string in a char buffer.
And so i comment out <<<< 2 and use <<<< 1 instead. As its suppose to write 
the encoded string into a buffer,
but the problem here is pEncBuf is empty even though bytesWritten says it 
wrote 4 bytes.
And i can't explain why it won't work.

So to sum it up
file Bio works and mem bio doesn't.

If any one of you have any ideas please let me know.

thanks  !


/// code
int b64encode(const char *pPlainText, int pSize, char *pEncBuf, unsigned int 
*pEncSize);

int main(int argc, char *argv[])
{
 char ch[] = "adsf";
 char enc[128];
 int encSize= 0;
 b64encode(ch, strlen(ch), enc, &encSize);
 printf("[%s]", enc);
}

int b64encode(const char *pPlainText, int pSize, char *pEncBuf, unsigned int 
*pEncSize)
{
   BIO *bio, *b64;

   b64 = BIO_new(BIO_f_base64 ());

   bio = BIO_new_mem_buf(pEncBuf, *pEncSize); <<<<< 1
  //bio = BIO_new_fp (stdout, BIO_NOCLOSE);    <<<<<  2

   BIO_push (b64, bio);

   int bytesWritten = BIO_write(b64, pPlainText, pSize);
   printf("Bytes Written %d, %s\n", bytesWritten, *pEncBuf);

   BIO_flush (bio);

   BIO_free_all (bio);
   return bytesWritten;
}
/// code ends

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