| /* This is a simple example of using the base64 BIO to a memory BIO and then |
| * getting the data. |
| */ |
| #include <stdio.h> |
| #include <openssl/bio.h> |
| #include <openssl/evp.h> |
| |
| main() |
| { |
| int i; |
| BIO *mbio,*b64bio,*bio; |
| char buf[512]; |
| char *p; |
| |
| mbio=BIO_new(BIO_s_mem()); |
| b64bio=BIO_new(BIO_f_base64()); |
| |
| bio=BIO_push(b64bio,mbio); |
| /* We now have bio pointing at b64->mem, the base64 bio encodes on |
| * write and decodes on read */ |
| |
| for (;;) |
| { |
| i=fread(buf,1,512,stdin); |
| if (i <= 0) break; |
| BIO_write(bio,buf,i); |
| } |
| /* We need to 'flush' things to push out the encoding of the |
| * last few bytes. There is special encoding if it is not a |
| * multiple of 3 |
| */ |
| BIO_flush(bio); |
| |
| printf("We have %d bytes available\n",BIO_pending(mbio)); |
| |
| /* We will now get a pointer to the data and the number of elements. */ |
| /* hmm... this one was not defined by a macro in bio.h, it will be for |
| * 0.9.1. The other option is too just read from the memory bio. |
| */ |
| i=(int)BIO_ctrl(mbio,BIO_CTRL_INFO,0,(char *)&p); |
| |
| printf("%d\n",i); |
| fwrite("---\n",1,4,stdout); |
| fwrite(p,1,i,stdout); |
| fwrite("---\n",1,4,stdout); |
| |
| /* This call will walk the chain freeing all the BIOs */ |
| BIO_free_all(bio); |
| } |