Visual C++ did not complain nor did it error out when it ran, but you are
correct it does take a BUF_MEM structure. I also added another BIO method to
the code. I also read that section in the book you suggested. I also made
the code simple, but it appears that it still does not give me the base64
encoding. Any suggestions...
int main()
{
BIO *bmem, *b64;
char message[] = "Hello World \n";
int written = 0;
b64 = BIO_new(BIO_f_base64());
bmem = BIO_new(BIO_s_mem());
bmem = BIO_push(b64, bmem);
written = BIO_write(b64, message, strlen(message));
cout << written << endl;
BIO_flush(b64);
BIO_free_all(b64);
}
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Joseph Oreste Bruni
Sent: Thursday, October 13, 2005 2:46 PM
To: openssl-users@openssl.org
Subject: Re: Base64 Help
"b64" is a filter BIO, it won't hold on to your data. You need to append a
"memory BIO" to the back end of the filter bio so that your output can be
accumulated.
There are samples on how to do this in the OpenSSL book as well as a rather
lengthy discussion on BIO's in general.
Also "BIO_get_mem_ptr()" gives you a pointer to BUF_MEM structure, not a
char*. Your compiler should have yelled at you for that.
On Oct 13, 2005, at 12:41 PM, Adam Jones wrote:
> Below is the code I am using to try and test the base64 encode in
> openssl. I am using rand to generate a binary and then encoding that
> to base64. Instead of using a file, I want to use memory to output the
> base64 encoded buffer. This code compiles and runs, but my output
> buffer is all 0. Any help would be appreciated. What have I missed?
>
> The variable written does show 16 like it should......help!
>
> #include <iostream>
> #include <memory.h>
> #include "evp.h"
> #include "rand.h"
> #include "bio.h"
>
> using namespace std;
>
> int main()
> {
> BIO *b64;
> unsigned char *pbuffer = new unsigned char [16]; unsigned char
> *pOutput = new unsigned char [100]; int written;
>
> memset(pOutput, '0', 100);
> RAND_bytes(pbuffer, 16);
> b64 = BIO_new(BIO_f_base64());
> written = BIO_write(b64, pbuffer, 16);
>
> cout << written << endl;
>
> BIO_get_mem_ptr(b64, pOutput);
>
> for ( int nLoop = 0; nLoop< 16; nLoop++) { cout << pOutput[nLoop];
> } cout << "\n" << endl;
>
> BIO_free_all(b64);
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