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