1/* This is a simple example of using the base64 BIO to a memory BIO and then
2 * getting the data.
3 */
4#include <stdio.h>
5#include <openssl/bio.h>
6#include <openssl/evp.h>
7
8main()
9	{
10	int i;
11	BIO *mbio,*b64bio,*bio;
12	char buf[512];
13	char *p;
14
15	mbio=BIO_new(BIO_s_mem());
16	b64bio=BIO_new(BIO_f_base64());
17
18	bio=BIO_push(b64bio,mbio);
19	/* We now have bio pointing at b64->mem, the base64 bio encodes on
20	 * write and decodes on read */
21
22	for (;;)
23		{
24		i=fread(buf,1,512,stdin);
25		if (i <= 0) break;
26		BIO_write(bio,buf,i);
27		}
28	/* We need to 'flush' things to push out the encoding of the
29	 * last few bytes.  There is special encoding if it is not a
30	 * multiple of 3
31	 */
32	BIO_flush(bio);
33
34	printf("We have %d bytes available\n",BIO_pending(mbio));
35
36	/* We will now get a pointer to the data and the number of elements. */
37	/* hmm... this one was not defined by a macro in bio.h, it will be for
38	 * 0.9.1.  The other option is too just read from the memory bio.
39	 */
40	i=(int)BIO_ctrl(mbio,BIO_CTRL_INFO,0,(char *)&p);
41
42	printf("%d\n",i);
43	fwrite("---\n",1,4,stdout);
44	fwrite(p,1,i,stdout);
45	fwrite("---\n",1,4,stdout);
46
47	/* This call will walk the chain freeing all the BIOs */
48	BIO_free_all(bio);
49	}
50