#include <u.h>#include <libc.h>#include <bio.h>#include <mp.h>#include <libsec.h> voidusage(void){	fprint(2, "auth/pemdecode section [file]\n");	exits("usage");} voidmain(int argc, char **argv){	char *buf, *cbuf;	int fd;	long n, tot;	int len;	char *tag, *file; 	ARGBEGIN{	default:		usage();	}ARGEND 	if(argc != 1 && argc != 2)		usage(); 	tag = argv[0];	if(argc == 2)		file = argv[1];	else		file = "#d/0"; 	if((fd = open(file, OREAD)) < 0)		sysfatal("open %s: %r", file);	buf = nil;	tot = 0;	for(;;){		buf = realloc(buf, tot+8192);		if(buf == nil)			sysfatal("realloc: %r");		if((n = read(fd, buf+tot, 8192)) < 0)			sysfatal("read: %r");		if(n == 0)			break;		tot += n;	}	buf[tot] = 0;	cbuf = malloc(2*tot);	if(cbuf == nil)		sysfatal("malloc: %r");	len = enc64(cbuf, 2*tot, (uchar*)buf, tot);	print("-----BEGIN %s-----\n", tag);	while(len > 0){		print("%.64s\n", cbuf);		cbuf += 64;		len -= 64;	}	print("-----END %s-----\n", tag);	exits(0);}