plan9fox/sys/src/cmd/auth/httpauth.c

#include <u.h>
#include <libc.h>
#include <authsrv.h>

int
httpauth(char *name, char *password)
{
	int afd;
	Ticketreq tr;
	Ticket	t;
	Authkey key;

	afd = authdial(nil, nil);
	if(afd < 0)
		return -1;

	passtokey(&key, password);

	/* send ticket request to AS */
	memset(&tr, 0, sizeof(tr));
	strcpy(tr.uid, name);
	tr.type = AuthHttp;
	if(_asrequest(afd, &tr) < 0){
		close(afd);
		return -1;
	}
	_asgetresp(afd, &t, nil, &key);
	close(afd);
	if(t.num != AuthHr || strcmp(t.cuid, tr.uid) != 0)
		return -1;

	return 0;
}

void
usage(void)
{
	fprint(2, "Usage:\n\t%s user pass\n\t%s authorization\n", argv0, argv0);
	exits("usage");
}

void
main(int argc, char *argv[])
{
	char *a, *s;
	int n;

	ARGBEGIN {
	} ARGEND

	switch(argc){
	default:
		usage();
		return;
	case 2:
		s = argv[0];
		a = argv[1];
		break;
	case 1:
		a = argv[0];
		if(cistrncmp(a, "Basic ", 6) == 0)
			a += 6;
		n = strlen(a);
		if((s = malloc(n+1)) == nil)
			sysfatal("out of memory");
		if((n = dec64((uchar*)s, n, a, n)) <= 0)
			sysfatal("bad base64");
		s[n] = '\0';
		if((a = strchr(s, ':')) == nil)
			sysfatal("bad format");
		*a++ = '\0';
		break;
	}
	if(*s == '\0')
		sysfatal("empty username");
	if(httpauth(s, a))
		sysfatal("bad password");
	print("%s\n", s);
	exits(nil);
}